Agricultural grain harvesting assisting mechanism for combined harvester and large-sized combined harvester equipped with the same

Abstract

To provide an agricultural grain reaping auxiliary mechanism capable of harvesting a large amount of beans such as adzuki beans cultivated in a large number of ridges at a time while remarkably reducing harvest loss regardless of seeding in various ridge widths, remarkably improving harvest work efficiency and remarkably shortening harvest time.SOLUTION: The air blowing device includes an air blowing pipe 4 having a plurality of sets of a pair of branch pipe 4a parts connected to a main pipe 4b part, a structure for freely adjusting an inclination and a height position to a cutting blade 22 of the tip part 4b1 part of the branch pipe, and a structure for adjusting an interval between the respective branch pipes connected to the main pipe and a substantially horizontal direction of the tip part of the branch pipe. The distal end portions of the branch pipes are narrowed in the vertical direction of the pipe line so as to eject air in a carpet shape, and have a slit-shaped ejection hole 4b1a opened forward and laterally, and each pair of branch pipes is arranged in a direction in which the distal end portions approach each other so that the air ejected in the carpet shape from the slit-shaped ejection hole intersects at the distal end position of the cutting blade.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an agricultural grain harvesting assist mechanism for assisting the harvesting of agricultural grain by the harvesting section of a large combine harvester, which is equipped with a harvesting section that harvests agricultural grain, a pair of reel support arms for attaching a raking reel, and a position adjustment means for the raking reel, and the harvesting section has a cutting blade on the front lower edge of the platform, and a large combine harvester equipped with the same. [Background technology]

[0002] Conventionally, large combine harvesters have been equipped with a running section 10 that runs the main body, a reaping section 20 that harvests agricultural grain, a transporting section 30 equipped with a conveyor 31 that transports the harvested agricultural grain, a threshing section 40 that threshes the transported agricultural grain, a sorting section 50 that sorts the threshed grains, and a straw waste processing section 60 that shreds the straw discharged by the threshing section 40, as shown in Figures 26 and 27.

[0003] The harvesting section 20 of this type of large combine harvester includes, for example, a platform 21, a cutting blade 22 for harvesting agricultural grain, a scraping reel 23 for scraping the agricultural grain toward the cutting blade 22, and a cross-feed auger 24 for sending the agricultural grain harvested by the cutting blade 22 to the conveying section 30, as shown in Figures 28 and 29. The cutting blade 22 is configured as a clipper-shaped blade extending in the left-right direction, and is provided on the front lower edge of the platform 21. The take-in reel 23 includes a pair of reel support arms 23a, a reel spindle 23b disposed between the tips of the reel support arms 23a, reel forming arms 23c extending radially from the left and right ends of the reel spindle 23b, connecting pieces 23d connecting the reel forming arms 23c, a tine bar 23e disposed between the tips of the reel forming arms 23c, tines 23f suspended at predetermined intervals from the tine bar 23e, a rotation drive means (reference numeral omitted) for rotating the reel spindle 23b, and a position adjustment means (reference numeral omitted) for adjusting its position up, down, front, and back. The take-in reel 23 is positioned above the platform 21 so that it can take in agricultural grain toward the cutting blade 22. The lateral feed auger 24 has a pair of spiral members 24b arranged symmetrically on the outer periphery of a cylindrical member 24a, and has raking fingers 24c arranged radially, and is configured to rotate by a rotary drive means (symbol omitted) to lateral feed the agricultural grain cut by the cutting blade 22 to the area where the conveying section 30 is provided. In addition, a grass-dividing member 25 is attached to both ends of the front side of the platform 21 to divide the agricultural grains in the harvesting range in the field.

[0004] When harvesting agricultural grain, this type of large combine travels via the traveling section 10, divides the agricultural grain within the cutting range with the dividing members 25, and then uses the rotating raking reel 23 to rake the agricultural grain within the cutting range that has been divided by the dividing members 25 toward the cutting blades 22, which then cuts the base of the stalks of the raked agricultural grain. A pair of rotating lateral feed augers 24 feeds the cut agricultural grain laterally to an area where the conveying section 30 is provided, and the conveyor 31 of the conveying section 30 transports the fed agricultural grain to the threshing section 40, where the sorting section 50 sorts the threshed grain, and the straw discharged by the threshing section 40 is shredded by the straw waste processing section 60 and discharged to the outside. Such combine harvesters are disclosed in the following Patent Documents 1 and 2.

[0005] Furthermore, some conventional large combine harvesters have a structure in which the reaping section 20 is provided with an air ejection device in addition to the reaping blade 22 and the raking reel 23, as shown in FIG. In this type of large combine harvester, for example, as shown in FIG. 31, the air ejection device includes a main pipe 4a and a number of elongated branch pipes 4b. The main pipe 4a is configured by connecting a hose and a pipe, and one end is connected to the centrifugal blower 3. The main pipe 4a has a portion 4a1 that is disposed in front of and above the cutting blade 22 and is generally parallel to the cutting blade 22. The other end of the main pipe 4a is closed by a lid (reference number omitted). The branch pipes 4b are connected at predetermined intervals to portions 4a1 of the main pipe 4a that are arranged substantially parallel to the cutting blade 22. The branch pipes 4b are bent near their distal ends 4b1 toward the cutting blade 22, which is located rearward and below. The branch pipes 4b are configured to eject air from the distal end 4b1 toward the cutting blade 22 in a substantially horizontal direction. Such a large combine harvester is disclosed in the following non-patent document 1. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-171851 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-171917 [Non-patent literature]

[0007] [Non-Patent Document 1] Auger heads, [online], https: / / awsairbar.com / products / auger-heads / Summary of the Invention [Problem to be solved by the invention]

[0008] Conventionally, when harvesting beans such as adzuki beans, there has been a problem in that the weight of the beans and pods themselves when they are harvested, or the impact of contact with the cutting blade or the tines of the raking reel, causes the beans and pods to pop out of the pods, causing them to fall below the platform instead of being sent to the lateral feed auger at the rear of the platform, which can easily result in a loss of harvest volume. In order to send the harvested beans and pods to the horizontal feed auger at the rear of the platform, As in the large combine harvester equipped with the air ejection device shown in Figure 30 and Figure 31, it is necessary to eject air from the front toward the cutting blade.

[0009] However, the single branch pipe installed on large combine harvesters does not provide enough airflow to send the beans and pods to the rear after harvesting without them falling. Furthermore, large combine harvesters equipped with an air ejection device that ejects air from the front toward the cutting blade, as shown in Figures 30 and 31, are designed for mass harvesting of wheat crops, and the spacing of the branch pipes does not match the standard row width for common beans such as adzuki beans, making it easy for the branch pipes to collide with the beans and cause them to fall just before harvesting. For this reason, it is difficult to harvest beans such as adzuki beans without loss using a large combine harvester equipped with an air ejection device that ejects air from the front toward the cutting blade, as shown in Figures 30 and 31, and to date, there have been no large combine harvesters that have been able to harvest beans such as adzuki beans without loss.

[0010] The present invention has been made in consideration of the above problems, and provides a large combine harvester equipped with a reaping section for reaping agricultural grains, the reaping section comprising a reaping blade, a raking reel and an air jetting device, the air jetting device comprising a main pipe and a number of branch pipes each connected to the main pipe at a predetermined interval and jetting air from its tip towards the reaping blade, the present invention being capable of preventing the branch pipes from colliding with the beans and pods immediately before reaping pulses such as soybeans and adzuki beans, regardless of whether the sowing is done with various row widths, and of controlling the weight of the beans and pods when reaping, and the tines of the raking reel when reaping pulses such as soybeans and adzuki beans, by adjusting the weight of the beans and pods when reaping, and the tines of the raking reel when reaping. To provide an agricultural grain harvesting auxiliary mechanism for a large combine harvester and a large combine harvester equipped with the same, which reduces the falling of beans and pods due to the beans popping out due to the impact when touched, sprays air so that the harvested beans such as adzuki beans can be reliably sent to a lateral feed auger at the rear of the platform, greatly reduces loss of harvest yield, harvests a large amount of beans such as adzuki beans cultivated on many ridges at once, greatly improves harvesting work efficiency, greatly shortens harvesting time, and also enables good harvesting of wheat. [Means for solving the problem]

[0011] In order to achieve the above object, the present invention provides a large combine harvester with a crop harvesting assist mechanism, which is equipped with a traveling section, a reaping section that reaps crops while being moved by the traveling section, a pair of reel support arms for mounting a raking reel, and a raking reel position adjustment means, and the reaping section is provided with a cutting blade that reaps crops and is mounted on the front lower edge of a platform. The reaping assist mechanism is provided on a large combine harvester and assists the reaping section in reaping crops by the reaping section, a centrifugal blower driven by rotation of the shaft member; a main pipe connected to an outlet of the centrifugal blower and having a portion disposed substantially parallel to the cutting blade in front of and above the cutting blade; and a plurality of pairs of branch pipes connected at predetermined intervals to the portion of the main pipe disposed substantially parallel to the cutting blade, the branch pipes being arranged adjacent to each other in adjacent pairs, The pipe bends toward the cutting blade located rearward and downward, and the tip of each branch pipe is formed with a narrowed pipe in the vertical direction so that air is sprayed in a carpet-like manner toward a predetermined range that covers a portion of the divided areas divided in the width direction of the area where the cutting blade is provided according to the number of branch pipes, and has slit-shaped outlet holes that open to the front and sides. The pair of branch pipes in each set are arranged so that their tips approach each other so that the air sprayed in a carpet-like manner from the slit-shaped outlet holes at their respective tips intersect at the tip of the cutting blade. The system is further characterized by the provision of a branch pipe inclination / position adjustment structure for freely adjusting the inclination and height position of the tip of the branch pipe relative to the cutting blade within a predetermined range from a height position near the cutting blade to 100 cm above the blade, and a branch pipe orientation / spacing adjustment structure for adjusting the spacing between the branch pipes connected to the main pipe and the approximately horizontal orientation of the tip of the branch pipe.

[0012] Furthermore, in the agricultural grain harvesting auxiliary mechanism for a large combine harvester of the present invention, it is preferable that the reel support arm and the ventilation pipe support member that supports the ventilation pipe are attached to different members on the platform, and that the adjustment of the tilt and height position of the tip of the branch pipe relative to the cutting blade using the branch pipe tilt / position adjustment structure, the adjustment of the spacing between the branch pipes connected to the main pipe and the approximately horizontal orientation of the tip of the branch pipe using the branch pipe orientation / spacing adjustment structure, and the adjustment of the position of the take-up reel using the take-up reel position adjustment means can be performed independently of one another.

[0013] Furthermore, in the agricultural grain harvesting auxiliary mechanism for a large combine harvester of the present invention, it is preferable that the tilt and position adjustment structure of the branch pipe is further configured so that the distance between the tip of the branch pipe and the cutting blade can be freely adjusted.

[0014] Furthermore, in the agricultural grain harvesting auxiliary mechanism for a large combine harvester of the present invention, it is preferable that the inclination and position adjustment structure of the branch pipe has an automatic branch pipe tip / cutting blade distance adjustment means that automatically adjusts the distance between the tip of the branch pipe and the cutting blade.

[0015] Furthermore, the agricultural grain harvesting auxiliary mechanism for a large combine harvester of the present invention is preferably configured so that the approximately horizontal orientation of the tip ends of all pairs of branch pipes can be adjusted simultaneously.

[0016] a centrifugal type air blower driven by rotation of the shaft member; a main pipe connected to an outlet of the centrifugal type air blower and having a portion disposed substantially parallel to the cutting blade in front of and above the cutting blade; and a plurality of pairs of branch pipes connected at a predetermined interval to the portion of the main pipe disposed substantially parallel to the cutting blade, the branch pipes being arranged adjacent to each other in adjacent pairs; The tips of the pipes are formed so that the pipe is narrowed in the vertical direction so that air is sprayed in a carpet-like manner toward a predetermined range that covers some of the divided areas divided in the width direction of the area where the cutting blade is provided according to the number of branch pipes, and have slit-shaped nozzles that open to the front and sides, and the pair of branch pipes in each set are arranged so that the tips of the branch pipes approach each other so that the air sprayed in a carpet-like manner from the slit-shaped nozzles at the respective tip ends intersect at the tip of the cutting blade, and the agricultural grain harvesting assist mechanism is further characterized by comprising a branch pipe inclination / position adjustment structure for freely adjusting the inclination and height position of the tip of the branch pipe relative to the cutting blade within a predetermined range from a height position near the cutting blade to 100 cm above the blade, and a branch pipe orientation / spacing adjustment structure for adjusting the spacing between the branch pipes connected to the main pipe and the approximately horizontal orientation of the tip of the branch pipe.

[0017] Furthermore, in the large combine harvester of the present invention, it is preferable that the agricultural grain harvesting auxiliary mechanism is configured so that the reel support arm and the ventilation pipe support member that supports the ventilation pipe are attached to different members on the platform, and that the tilt and height position of the tip of the branch pipe relative to the cutting blade can be adjusted using the branch pipe tilt / position adjustment structure, the spacing between the branch pipes connected to the main pipe and the approximately horizontal orientation of the tip of the branch pipe can be adjusted using the branch pipe orientation / spacing adjustment structure, and the position of the take-up reel can be adjusted using the take-up reel position adjustment means, all independently of one another.

[0018] Furthermore, in the large combine harvester of the present invention, it is preferable that the agricultural grain harvesting auxiliary mechanism is configured so that the tilt and position adjustment structure of the branch pipe can further freely adjust the distance between the tip of the branch pipe and the cutting blade.

[0019] Furthermore, in the large combine harvester of the present invention, it is preferable that the agricultural grain harvesting auxiliary mechanism has an automatic branch pipe tip / blade spacing adjustment means for automatically adjusting the spacing between the tip of the branch pipe and the cutting blade.

[0020] In the large combine harvester of the present invention, it is preferable that the surface of the front lower edge of the platform having the cutting blade in the cutting section is formed into a flat surface from the cutting blade toward the lateral feed auger.

[0021] In addition, the large combine harvester of the present invention has a conveying section equipped with a conveyor for transporting the agricultural grain harvested by the harvesting section, a threshing section equipped with a thresher for threshing the transported agricultural grain, a sorting section arranged below the threshing section for shaking the agricultural grain transported by the conveying section and threshed in the threshing section to separate it into grains and other waste, and a feed pan arranged between the conveying section and the sorting section for receiving the threshed agricultural grain and removing husks and waste with air blown in by a cleaning fan, and it is preferable that the feed pan is configured so that it has a surface that slopes gently downward from the side end of the conveying section to a predetermined position toward the sorting section.

[0022] Furthermore, in the large combine harvester of the present invention, it is preferable that the agricultural grain harvesting auxiliary mechanism is configured so that the branch pipe direction / spacing adjustment structure can simultaneously adjust the approximately horizontal direction of the tip ends of all pairs of branch pipes.

[0023] In addition, the large combine of the present invention is equipped with a conveying section equipped with a conveyor that transports the agricultural grain harvested by the harvesting section, a threshing section equipped with a thresher that threshes the transported agricultural grain, a sorting section arranged below the threshing section that shakes the agricultural grain transported by the conveying section and threshed in the threshing section to separate it into grains and other waste, and a straw waste processing section that shreds the straw waste discharged by the threshing section, and it is preferable that the covers covering the sides and rear of the combine are removable, exposing the drive mechanism and piping, and that each of the conveying section, threshing section, sorting section and straw waste processing section is equipped with a window of a predetermined size and shape that allows the internal processing status to be observed from the outside and that allows work to be performed from the outside to resolve blockages, malfunctions and other internal problems.

[0024] In addition, in the large combine of the present invention, it is preferable that the surfaces of each component present inside the conveying section, the threshing section, the sorting section, and the straw disposal section are coated with an antistatic film or an anti-adhesion film. [Effects of the Invention]

[0025] According to the present invention, in a large combine harvester equipped with a reaping section for reaping agricultural grains, the reaping section having a reaping blade, a raking reel, and an air ejection device, the air ejection device having a main pipe and a number of branch pipes each connected to the main pipe at a predetermined interval and ejecting air from the tip toward the reaping blade, regardless of whether sowing is performed with various row widths, the branch pipes do not collide with the beans and pods immediately before reaping beans such as soybeans and adzuki beans, and the weight of the beans and pods when reaped and the tines of the raking reel do not come into contact with the reaping blade or the tines of the raking reel when reaping beans such as soybeans and adzuki beans. The present invention provides a large combine harvester equipped with an agricultural grain harvesting auxiliary mechanism that reduces the falling of beans and pods due to the beans popping out due to impact when harvesting, ejects air so that the harvested beans such as adzuki beans can be reliably sent to the horizontal feed auger at the rear of the platform, and harvests a large amount of beans such as adzuki beans cultivated on many ridges at once while significantly reducing loss of harvest yield, significantly improves harvesting work efficiency, significantly shortens harvesting time, and is also capable of successfully harvesting wheat. [Brief explanation of the drawings]

[0026] [Figure 1] 1A and 1B are explanatory diagrams showing the configuration of the devices and components related to air ejection provided in the agricultural grain harvesting auxiliary mechanism of a large combine harvester according to the first embodiment of the present invention, in which (a) is a schematic diagram showing the arrangement of multiple pairs of branch pipes connected to the main pipe using the branch pipe direction / spacing adjustment structure of the first configuration example, and (b) is a schematic diagram seen from the side. [Figure 2] 1 is an explanatory diagram showing the configuration of the tip of a branch pipe provided in the agricultural grain harvesting auxiliary mechanism of a large combine harvester of the first embodiment, where (a) is a side view with the cutting blade side on the right side of the page, (b) is a partially enlarged cross-sectional view, (c) is a partially enlarged view as seen from diagonally above, and (d) is a front view of the tip of the branch pipe. [Figure 3] FIG. 10 is a partial perspective view showing a state in which a branch pipe is attached to a main pipe using a branch pipe direction / spacing adjustment structure of a first configuration example provided in the agricultural grain reaping auxiliary mechanism of a large combine harvester of the first embodiment. [Figure 4]1 is an explanatory diagram showing the schematic configuration of the main parts of the branch pipe direction / spacing adjustment structure of the first configuration example provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester of the first embodiment, (a) shows the plate belt provided in the branch pipe connecting / fixing member in the branch pipe direction / spacing adjustment structure of the first configuration example from the side where it is attached to the main pipe, and is also a diagram showing the shape of the end of the branch pipe on the connection side to the main pipe, (b) is a diagram showing the configuration of the U-shaped bolt provided in the branch pipe connecting / fixing member, and (c) is a partially enlarged cross-sectional view showing the fitting state of the plate belt and branch pipes and the fitting state of the branch pipe with the mounting hole of the main pipe when the plate belt with the branch pipe fitted in it is attached to the main pipe. [Figure 5] FIG. 10 is a schematic diagram illustrating the arrangement of multiple pairs of branch pipes connected to a main pipe using a branch pipe direction / spacing adjustment structure of a second configuration example provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester according to the first embodiment. [Figure 6] 10 is an explanatory diagram showing a schematic configuration of a main part of a branch pipe direction / spacing adjustment structure of a second configuration example provided in the agricultural grain reaping auxiliary mechanism of the large combine harvester of the first embodiment; FIG. [Figure 7] 10A and 10B are explanatory diagrams showing the main pipe and the main components of the branch pipe in the branch pipe direction and spacing adjustment structure of the second configuration example provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester of the first embodiment, in which (a) is a partial plan view showing the side where the branch pipe of the main pipe is attached, (b) is an enlarged cross-sectional view taken along line AA of (a), (c) is a view of one branch pipe from the side, and (d) is an enlarged cross-sectional view taken along line BB of (c). [Figure 8] 10A and 10B are explanatory diagrams showing the configuration of a plate-shaped base member provided in a branch pipe connection unit in a branch pipe direction / spacing adjustment structure of a second configuration example provided in the agricultural grain harvesting auxiliary mechanism of a large combine harvester of the first embodiment, where (a) is a plan view and (b) is a CC cross-sectional view of (a). [Figure 9]10A and 10B are explanatory diagrams showing the configuration of the annular member provided in the branch pipe connection unit in the branch pipe direction / spacing adjustment structure of the second configuration example provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester of the first embodiment, where (a) is a plan view, (b) is a side view, (c) is a diagram showing the state in which a pair of annular members are provided on the plate-shaped base member in the DD cross section of (a), and (d) is a cross section showing the first female screw portion in the state in which the branch pipe is screwed. [Figure 10] 10A and 10B are explanatory diagrams showing the configuration of the annular member fixing member provided in the branch pipe connection unit in the branch pipe direction / spacing adjustment structure of the second configuration example provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester of the first embodiment, where (a) is a plan view showing the positional relationship of the rotation amount adjustment part of the annular member with respect to the guide hole, and (b) is a cross-sectional view showing the positional relationship with the annular member provided on the plate-shaped base member. [Figure 11] 10A and 10B are explanatory diagrams showing the configuration of the branch pipe connection unit fixing member in the branch pipe direction / spacing adjustment structure of the second configuration example provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester of the first embodiment, where (a) is a diagram showing the configuration of the plate belt, and (b) is a diagram showing the configuration of the U-bolt. [Figure 12] 1A and 1B are explanatory diagrams showing the main parts of the branch pipe tilt / position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester of the first embodiment, in which (a) is a schematic diagram showing the positional relationship between a pair of reel support arms and a ventilation pipe support member that supports the ventilation pipe, as viewed from the front side of the platform, and (b) is a schematic diagram as viewed from the side. [Figure 13] FIG. 10 is a partial explanatory diagram showing, from a diagonal front view, the positional relationship between a pair of reel support arms and a ventilation pipe support member that supports the ventilation pipe in the branch pipe tilt / position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester of the first embodiment. [Figure 14] 10A and 10B are explanatory diagrams showing the main parts of the branch pipe tilt / position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism of a large combine harvester according to a second embodiment of the present invention, in which (a) is a schematic diagram showing the positional relationship between a pair of reel support arms and a ventilation pipe support member that supports the ventilation pipe, as viewed from the front side of the platform, and (b) is a schematic diagram as viewed from the side. [Figure 15]FIG. 10 is a partial explanatory view showing, from a diagonal front view, the positional relationship between a pair of reel support arms and an air supply pipe support member that supports the air supply pipe in the branch pipe tilt / position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism of a large combine harvester of the second embodiment. [Figure 16] FIG. 10 is an explanatory diagram showing the main parts of the branch pipe tilt / position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism of a large combine harvester according to the third embodiment of the present invention, and is a partial explanatory diagram showing the configuration of the ventilation pipe support member that supports the ventilation pipe from an oblique front view. [Figure 17] 10 is a partially enlarged view showing the configuration of an air blowing pipe support member that supports an air blowing pipe in a branch pipe tilt / position adjustment structure provided in an agricultural grain reaping auxiliary mechanism of a large combine harvester according to a third embodiment. FIG. [Figure 18] 10A and 10B are explanatory diagrams showing the main parts of the tilt and position adjustment structure of the branch pipes provided in the agricultural grain harvesting auxiliary mechanism of a large combine harvester according to a fourth embodiment of the present invention, where (a) is a partially enlarged view, and (b) is a cross-sectional view showing the internal configuration. [Figure 19] 10 is an explanatory diagram showing the main parts of a branch pipe direction and spacing adjustment structure provided in a farm grain reaping auxiliary mechanism of a large combine harvester according to a fifth embodiment of the present invention. FIG. [Figure 20] 10 is an explanatory diagram showing the main parts of the branch pipe direction / spacing adjustment structure provided in the agricultural grain harvesting auxiliary mechanism of a large combine harvester according to a fifth embodiment of the present invention, in which (a) is a partial plan view from below of a state in which a branch pipe mounting tubular member having a flange-shaped member fixed thereto is attached to a base plate, (b) is a partial plan view from below of (a) in which a first connecting member has been attached, (c) is a partial plan view from below of (a) in which a second connecting member has been attached, (d) is a partial plan view from below of the branch pipe direction / spacing adjustment structure, and (e) is a partial front view of the branch pipe direction / spacing adjustment structure as seen from the front. [Figure 21] FIG. 10 is an explanatory diagram showing the configuration of the main parts of a large combine harvester according to a sixth embodiment of the present invention. [Figure 22] FIG. 13 is an explanatory diagram showing a schematic side view of the configuration of a main part in a sixth embodiment. [Figure 23] FIG. 1 is an explanatory diagram showing the configuration of a feed pan in an existing large combine harvester from diagonally above. [Figure 24] An explanatory diagram showing the configuration of the feed pan of a large combine harvester according to the seventh embodiment of the present invention in comparison with an existing large combine harvester, where (a) is an explanatory diagram showing a schematic side view of the configuration of the feed pan of an existing large combine harvester, and (b) is an explanatory diagram showing a schematic side view of the configuration of the feed pan of a large combine harvester according to the seventh embodiment. [Figure 25] FIG. 13 is an explanatory diagram showing an example of the configuration of the main parts of a large combine harvester according to an eighth embodiment of the present invention. [Figure 26] FIG. 1 is a side view showing an example of the overall configuration of a conventional large combine harvester. [Figure 27] FIG. 27 is a top view of the large combine harvester of FIG. [Figure 28] FIG. 27 is a plan view showing an example of the configuration of the reaping section of the large combine harvester of FIG. 26. [Figure 29] FIG. 29 is a side view of the reaping section of the large combine harvester of FIG. 28. [Figure 30] FIG. 1 is a perspective view showing an example of the overall configuration of a large combine harvester equipped with a conventional air ejection device that ejects air from the front toward the cutting blade. [Figure 31] 31A and 31B are explanatory diagrams showing an example of the configuration of an air ejection device in the large combine of FIG. 30, in which (a) is a schematic diagram showing the overall schematic configuration, and (b) is a schematic diagram seen from the side. [Figure 32] This is an explanatory diagram showing an example of the configuration of an agricultural grain harvesting assist mechanism that the present inventors derived, considered, and examined during the process of consideration and investigation that led to the invention. (a) is a top view showing the entire constituent parts, and (b) is a schematic view from the side. [Figure 33] 33 is a partial explanatory view showing the main configuration of the agricultural grain reaping auxiliary mechanism of FIG. 32 from an oblique front view. FIG. [Figure 34] 33 is a partial explanatory diagram showing the configuration of components arranged near the cutting blade of the cutting unit in the agricultural grain cutting assist mechanism of FIG. 32, as viewed from the side. FIG. [Figure 35]32A and 32B are explanatory diagrams showing the configuration of the air ejection member provided in the agricultural grain harvesting auxiliary mechanism, in which (a) is a view from diagonally above the cutting blade side, (b) is a partially enlarged cross-sectional view, and (c) is an enlarged view of the ejection part.

[0027] Before describing the embodiments, the circumstances under which the present invention was derived and the effects of the present invention will be described. 1. How the present invention was derived (1) Problems with harvesting beans such as adzuki beans As mentioned above, in the past, when harvesting beans such as adzuki beans, there was a problem in that the weight of the beans and pods themselves when they were harvested, or the impact of coming into contact with the cutting blade or the tines of the scraping reel, caused the beans and pods to pop out of the pods, causing them to fall below the platform instead of being sent to the lateral feed auger at the rear of the platform, which was likely to result in a loss of harvest volume.

[0028] More specifically, unlike barley, wheat, and the like, legumes such as soybeans and adzuki beans have characteristics such as low pod height and susceptibility to lodging, tendency to bear fruit close to the ground even if they are not lodged, individual fruits being large and heavy, and needing to be dried before harvesting. For this reason, when harvesting beans such as soybeans and adzuki beans using a conventional combine harvester, the weight of the beans and pods when they are cut by the cutting blade, or the impact of contact with the cutting blade or the tines of the raking reel, can cause the beans to pop out of the pods, and the cut beans and pods can fall below the platform instead of being sent to the lateral feed auger at the rear of the platform, which can easily result in a loss of harvest volume. Furthermore, weeds are likely to grow in fields where beans such as soybeans and adzuki beans are grown. When a conventional combine harvester is used to harvest beans such as soybeans and adzuki beans in a field where weeds have grown, the weeds can block the path of the beans and pods cut by the blade from the position of the blade toward the lateral feed auger at the rear of the platform, causing them to easily fall below the platform, potentially resulting in even greater losses in the harvest yield.

[0029] For this reason, it is difficult to reduce losses in the harvest yield with the large combine harvesters of the types described in Patent Documents 1 and 2 shown in FIGS. In order to send the harvested beans and pods to the cross-feed auger at the rear of the platform, it is necessary to spray air from the front toward the cutting blade, as in the large combine harvester equipped with an air spray device shown in Figures 30 and 31.

[0030] (2) Problems with large combine harvesters equipped with an air jet device that jets air from the front toward the cutting blade However, in large combine harvesters of the type shown in Figures 30 and 31, which are equipped with an air ejection device that ejects air from the front toward the cutting blade, the spacing of the branch pipes does not match the standard row width for common beans such as adzuki beans, and the branch pipes are likely to collide with the beans such as adzuki beans and cause them to fall just before harvesting. In addition, the single branch pipe installed on large combine harvesters does not provide enough airflow to send the beans and pods to the rear after harvesting without them falling. For this reason, it has been difficult to harvest beans such as adzuki beans without loss using large combine harvesters equipped with an air ejection device that ejects air from the front toward the cutting blade, as shown in Figures 30 and 31, and there have been no large combine harvesters that have made it possible to harvest beans such as adzuki beans without loss.

[0031] (3) A trial and error process to achieve loss-free harvesting of beans such as adzuki beans using a large combine harvester equipped with an air jet device that jets air from the front toward the cutting blade. Considering the current situation of Japanese farms, the agricultural workforce is steadily declining due to factors such as a declining birthrate and a lack of successors, while the area under cultivation per farm household is increasing. In other words, there is a shift from the traditional system of many farmers harvesting on small areas to a system of fewer farmers harvesting on large areas. As a result, there is a demand for combine harvesters for harvesting agricultural grains that are compatible with large areas rather than the traditional system of small areas. However, in Japan, foreign-made combine harvesters such as those shown in Non-Patent Document 1 are used to handle large-scale cultivated areas. However, large foreign-made combine harvesters are designed to be suitable for harvesting grains such as wheat, and are not suitable for harvesting beans. For this reason, as mentioned above, it has traditionally been thought to be difficult to harvest azuki beans using large combine harvesters equipped with an air ejection device that ejects air from the front toward the cutting blade, and it has not been possible to harvest azuki beans and other legumes without loss using this type of large combine harvester.

[0032] However, the inventors of the present invention decided to take on the challenge of realizing the loss-free harvesting of beans such as adzuki beans using a large combine harvester equipped with an air ejection device that ejects air from the front toward the cutting blade, as shown in Figures 30 and 31, which had not been possible in the past. However, such trial and error was criticized by experienced farmers, agricultural cooperatives, agricultural machinery manufacturers, and other experts, who said that such trial and error was pointless, and the company was also abandoned by officials from the manufacturer of the large combine harvester in question, so it was unable to obtain any support for its trial and error efforts. For this reason, the inventors decided to conduct repeated trial and error on their own.

[0033] (3-1) Confirmation of yield loss when harvesting adzuki beans sown and cultivated with standard ridge width using a large combine harvester equipped with an air jetting device that jets air from the front toward the cutting blade. First, the inventors prepared a large combine harvester equipped with an air jetting device that jets air from the front toward the cutting blade, as shown in Figures 30 and 31. Furthermore, in the test field, seeds were sown with a conventional standard 67 cm row spacing and cultivated. Adzuki beans grown in Tokachi, Hokkaido, are typically sown with a 67 cm row spacing, and the tractor, seed drill, cultivator, and harvesting machine are all generally designed to fit this 67 cm row spacing. On the other hand, in the large combine harvester type shown in Figures 30 and 31, which is equipped with an air jet device that jets air from the front toward the cutting blade, the attachment width of the branch pipes to the main pipe is designed to be 30 cm, which does not match the width of the adzuki bean rows, 67 cm. As a result, it was predicted that the branch pipes would collide with many of the adzuki bean pods during harvesting, resulting in a large loss of harvest volume. The inventors then used the large combine harvester they had purchased to harvest the adzuki beans that had been sown and cultivated in a test field with a generally standard ridge width. During actual test harvesting, it was confirmed that the branch pipe collided with many azuki bean pods, causing the pods to burst open and fall, resulting in a large loss of harvested yield.

[0034] (3-2) Harvesting test of adzuki beans sown and cultivated with standard ridge width using a large combine harvester equipped with an air injection device whose branch pipe installation position was modified to fit the standard ridge width. The following year, the inventors removed the branch pipes attached to the main pipe of the large combine harvester, welded together the holes that had been drilled in the main pipe at 30 cm intervals, drilled new holes at 67 cm intervals, and attached branch pipes in the positions of the new holes. Then, using a large combine harvester with the branch pipe attachment position modified as described above, a harvest test was conducted on adzuki beans that had been sown and cultivated at the conventional general standard of 67 cm. When harvesting, one branch pipe was positioned at one end of one ridge in the width direction, and air was sprayed in a carpet-like pattern over the entire width of the ridge, while ensuring that the branch pipe did not collide with the adzuki beans grown in the center. The harvesting test results showed that the branch pipes could be prevented from hitting the adzuki bean pods during harvesting. However, with one branch pipe per ridge, the amount of air blown from the branch pipe toward the cutting blade that cuts the adzuki beans was insufficient in the area far from the branch pipe in the width direction of the ridge, and the beans and pods fell after being cut by the cutting blade, and could not be sent backward.

[0035] (3-3) Consideration and examination of measures to increase the volume of air blown from the branch pipe toward the cutting blade that cuts the azuki beans Therefore, the inventors of the present invention have considered and researched measures to increase the volume of air that is sprayed from the branch pipe toward the cutting blade that cuts the azuki beans when cutting soybeans, adzuki beans, and other pulses, and have come up with the following agricultural grain cutting assistance mechanism.

[0036] The agricultural grain harvesting assist mechanism that the present inventors have arrived at in the course of their intermediate consideration and investigation is a harvesting assist mechanism for a combine that is provided on a large combine harvester and assists the harvesting of agricultural grain by the harvesting section, and is equipped with a traveling section, a harvesting section that harvests agricultural grain while being moved by the traveling section, a pair of reel support arms for attaching a raking reel, and a position adjustment means for the raking reel, and the harvesting section is provided with a cutting blade that harvests agricultural grain on the front lower edge of the platform. As shown in Figure 32, the combine harvester includes a shaft member 2 connected to a predetermined rotary drive shaft provided on a large combine harvester, a centrifugal type blower 3 driven by the rotation of the shaft member 2, a main pipe 4a connected to the outlet of the centrifugal type blower 3 and a blower pipe 4 having a plurality of branch pipes 4b branching off from the main pipe 4a, a plurality of air ejection members 5 that eject air from the plurality of branch pipes 4b toward the cutting blade side, and an air ejection member support member 6 that supports the air ejection member 5. Each air ejection member 5 has an ejection part 5a and a communication part 5b, as shown in, for example, FIGS. The ejection part 5a has an ejection hole 5a1 on the cutting blade 22 side of the air ejection member 5. The ejection hole 5a1 is formed in the shape of a slit of a predetermined length that ejects air into a predetermined range that covers a portion of the divided areas that are divided in the width direction of the area where the cutting blade 22 is provided according to the number of branch pipes 4b. The ejection portion 5a is formed in a generally fan-like shape with its width increasing toward the ejection holes 5a1 and its thickness decreasing toward the ejection holes 5a1. The communicating portion 5b is composed of a tubular member having one end connected to the outlet of each branch pipe 4b and the other end 5b1 bent toward the cutting blade 22 and connected to the end 5a2 opposite the ejection hole 5a1 of the ejection portion 5a. Each air ejection member 5 is supported by an air ejection member support member 6 and is arranged such that the slit-shaped ejection holes 5a1 are oriented parallel to the width direction of the area in which the cutting blade 22 is provided. The air blowing member support member 6 is made of an elongated member arranged parallel to the widthwise side of the area where the cutting blade 22 is provided at the front lower end of the platform 21, and supports the communication parts 5b of each air blowing member 5 on the surface facing the cutting blade 22, and is supported by a pair of reel support arms 23a for attaching the take-up reel shown in Figures 28 and 29. The take-up reel 23 shown in Figures 28 and 29 is provided with conventionally known position adjustment means (not shown) on each of the pair of reel support arms 23a that can adjust the position up, down, front, and back. The agricultural grain harvesting assist mechanism 1 shown in Figures 32 to 35, which was derived by the inventors of the present invention, is configured to freely change the inclination and height position of the air ejection member to eject air from the ejection holes within a predetermined range from a height position near the cutting blade (a height position within a predetermined range of 0 to several cm above the cutting blade) to 100 cm above the cutting blade, via a pair of reel support arms 23a and an air ejection member support member 6 supported by the pair of reel support arms 23a.

[0037] According to the agricultural grain harvesting assist mechanism 1 shown in Figures 32 to 35, which was developed by the inventors, when beans such as soybeans and adzuki beans are ejected from the pods due to the impact when they are harvested by the cutting blade 22, and when the beans and pods tend to fall due to their own weight, the area of ​​the ejection area is narrowed and the air is ejected from the ejection hole 5a1 of the ejection section 5a of the air ejection member 5 toward a height position near the cutting blade (a height position in a predetermined range of 0 to several cm above the cutting blade 22), and the strong wind pressure of the air makes it easier for them to be sent to the cross-feed auger at the rear of the platform without falling below the platform. Furthermore, since the ejection portion 5a of the air ejection member 5 is formed in an approximately fan-shaped shape with a width that widens toward the ejection hole 5a1 side, it becomes easier to eject air with strong wind pressure from the ejection hole 5a1 of the air ejection member 5 even toward positions toward the cutting blade 22 between the individual air ejection members 5 divided according to the number of branch pipes 4b. This significantly reduces harvest losses due to leftover soybeans, adzuki beans, and other legumes that have fallen over and not been lifted, as well as losses in yield due to beans and pods falling when harvesting soybeans, adzuki beans, and other legumes, resulting in a significant increase in harvest yield. Furthermore, when harvesting beans such as soybeans and adzuki beans in a field where weeds are still present, even if the beans and pods cut by the cutting blade 22 are blocked by the cut weeds from moving from the position of the cutting blade 22 toward the lateral feed auger at the rear of the platform, the powerful wind pressure of the air that is sprayed from the outlet 5a1 of the outlet portion 5a of the air jetting member 5 at a height that can be freely changed in inclination and height within a predetermined range from a height position near the cutting blade 22 (a height position in a predetermined range of 0 to several cm above the cutting blade 22) to 100 cm above the cutting blade 22 makes it easier for the cut beans and pods to be sent to the lateral feed auger at the rear of the platform without falling below the platform. Therefore, the agricultural grain harvesting assist mechanism 1 shown in Figures 32 to 35, which was developed by the inventors of the present invention, does not require a raking reel and can harvest pulses such as soybeans and adzuki beans even when weeds remain in the field, while significantly reducing harvest loss due to falling beans and pods compared to a configuration equipped with a raking reel. However, the inventors of the present invention have confirmed that the agricultural grain harvesting assist mechanism 1 shown in Figures 32 to 35 has a problem in that the air ejection member 5 connected to the outlet of the branch pipe 4b has a shape that extends horizontally, which interferes with the harvesting of beans.

[0038] (3-4) A harvest test of adzuki beans sown and cultivated with a standard ridge width was conducted using a large combine harvester equipped with an air injection device modified so that the branch pipe installation position was adapted to the standard ridge width and air was injected from two branch pipes per ridge. Next, the inventors welded the holes drilled in the main pipe of the large combine harvester shut, drilled a pair of new holes 67 cm apart, and attached branch pipes to the holes. When attaching the branch pipes to the holes in the main pipe, the tips of the branch pipes were oriented horizontally so that air could be sprayed from the tips of the branch pipes attached to the holes 67 cm apart toward the adzuki beans grown in one row, and the branch pipes were then fixed to the main pipe. Then, the branch pipes were attached at positions consistent with the standard ridge width, and a large combine harvester was modified so that air was sprayed from two branch pipes per ridge, and a harvest test was conducted on adzuki beans that had been sown and cultivated at the conventional standard 67 cm distance. Furthermore, instead of connecting the air spray element 5, which has a horizontally extending shape as shown in Figures 32 to 35, to the branch pipe attached to the main pipe, slit-shaped spray holes that open forward and to the sides were formed at the tip of the branch pipe. Harvesting tests showed that the branch pipes were able to prevent the adzuki bean pods from colliding with the branch pipes during harvesting. Moreover, by arranging two branch pipes per ridge, the amount of air sprayed from the branch pipes toward the cutting blades that cut the adzuki beans was sufficient, forming an air carpet (air bed) around the entire harvest inlet, and allowing the beans and pods cut by the cutting blades to be sent to the rear without falling. In this way, the large combine equipped with the agricultural grain harvesting assistance mechanism prototyped by the inventors makes it possible to harvest beans such as adzuki beans grown on multiple rows at once, while significantly reducing harvest losses that were previously not possible due to pods popping off when contacted with the machine and impact of the harvesting blade during harvesting, thereby greatly improving harvesting efficiency and significantly shortening harvesting time.

[0039] (4) Examination and consideration of the problems inherent in the prototype large combine equipped with the agricultural grain harvesting assist mechanism developed by the present inventors Furthermore, the inventors of the present invention further studied and considered the prototype of the large combine harvester they had created. As a result, they discovered that the prototype had the following inherent problems. In recent years, in order to improve productivity, there has been active development of improved varieties of beans such as adzuki beans, and experimental cultivation has been carried out with sowing widths that differ from the conventional standard row width. Therefore, in the future, it is expected that beans such as adzuki beans will be sown with various row widths that differ from the conventional standard row width. However, the prototype large combine harvester developed by the inventors has a different arrangement of branch pipes connected to the main pipe by closing existing holes in the main pipe and drilling new holes, making it impossible to freely and easily change the connection positions of the branch pipes attached to the main pipe. As a result, it is difficult to harvest beans, such as adzuki beans, that are sown in various row widths without loss using the prototype large combine harvester developed by the inventors.

[0040] Therefore, the inventors of the present invention conducted further research, consideration, and trial and error to find a way to easily harvest beans sown in various row widths without loss using a large combine harvester. Furthermore, the inventors have also conducted extensive research, consideration, and trial and error into the issues that need to be improved, from the perspective of easily eliminating problems such as clogging and breakdowns that can occur during transportation, threshing, sorting, and discharge of beans after harvesting, as a measure to further reduce harvest losses when harvesting beans using large combine harvesters. As a result, in a large combine harvester equipped with a reaping section for reaping agricultural grains, the reaping section having a reaping blade, a raking reel, and an air jetting device, the air jetting device having a main pipe and a number of branch pipes each connected to the main pipe at a predetermined interval and jetting air from the tip toward the reaping blade, regardless of whether the sowing was done in various row widths, the branch pipes do not collide with the beans and pods immediately before reaping beans such as soybeans and adzuki beans, and the weight of the beans and pods when reaping, or the tines of the raking reel come into contact with the reaping blade or the tines of the raking reel when reaping beans such as soybeans and adzuki beans. This reduces the falling of beans and pods caused by the beans being ejected due to the impact of the wind, and sprays air to ensure that the harvested beans, such as adzuki beans, are sent to the horizontal feed auger at the rear of the platform, significantly reducing harvest loss while harvesting large quantities of adzuki beans and other beans grown on many ridges at once. This greatly improves harvesting efficiency and significantly shortens harvesting time, and it has been possible to successfully harvest wheat as well. This has led to the development of an agricultural grain harvesting assist mechanism for a large combine harvester and a large combine harvester equipped with this mechanism.

[0041] The agricultural grain reaping assist mechanism for a large combine of the present invention is equipped with a traveling section, a reaping section that reaps agricultural grain while being traveled by the traveling section, a pair of reel support arms for attaching a raking reel, and a raking reel position adjustment means, and the reaping section is provided with a cutting blade that reaps agricultural grain and is provided at the front lower edge of the platform, and is a reaping assist mechanism that assists the reaping section in reaping agricultural grain, and is provided on the large combine. a centrifugal air blower driven by rotation of the shaft member; a main pipe connected to an outlet of the centrifugal air blower and having a portion disposed substantially parallel to the cutting blade in front of and above the cutting blade; and a plurality of pairs of branch pipes connected at predetermined intervals to the portion of the main pipe disposed substantially parallel to the cutting blade, the branch pipes being arranged adjacent to each other in adjacent pairs, The branch pipes are bent toward the cutting blade located rearward and downward, and the tip end of each branch pipe is formed with a narrowed pipe in the vertical direction so that air is sprayed in a carpet-like manner toward a predetermined range that covers some of the divided areas divided in the width direction of the area where the cutting blade is provided according to the number of branch pipes, and has slit-shaped outlet holes that open to the front and sides. The pair of branch pipes in each set are arranged so that their tips approach each other so that the air sprayed in a carpet-like manner from the slit-shaped outlet holes at their respective tip ends intersect at the tip of the cutting blade. The main pipe further includes a branch pipe inclination / position adjustment structure for freely adjusting the inclination and height position of the tip end of the branch pipe with respect to the cutting blade within a predetermined range from a height position near the cutting blade to 100 cm above the cutting blade, and a branch pipe orientation / spacing adjustment structure for adjusting the interval between the branch pipes connected to the main pipe and the approximately horizontal orientation of the tip end of the branch pipe.

[0042] The agricultural grain harvesting auxiliary mechanism for a large combine harvester of the present invention is provided with a main pipe connected to the outlet of a centrifugal type air blower and having a portion disposed substantially parallel to the cutting blade in front of and above the cutting blade, and a plurality of pairs of branch pipes each connected at a predetermined interval to the portion of the main pipe disposed substantially parallel to the cutting blade, and adjacent branch pipes in adjacent pairs are disposed close to each other, and each branch pipe is bent toward the cutting blade located rearward and below, and the tip of each branch pipe is formed so that the pipe is narrowed in the vertical direction and has slit-shaped openings in the front and sides so that air is sprayed in a carpet-like manner toward a predetermined range that covers a portion of the divided areas divided in the width direction of the area where the cutting blade is provided according to the number of branch pipes. If the pair of branch pipes in each set have slit-shaped nozzles at their tips and the pair of branch pipes in each set are arranged so that the air sprayed in a carpet-like manner from the slit-shaped nozzles at their respective tips intersects at the tip of the cutting blade, beans that are ejected from the pods by the impact when soybeans, adzuki beans, and other beans are cut by the cutting blade, and beans and pods that tend to fall under their own weight will be sprayed in a carpet-like manner from the slit-shaped nozzles at the tips of the pair of branch pipes in each set toward a predetermined range that covers a portion of the divided area that is divided in the width direction of the area where the cutting blade is located according to the number of branch pipes, and the strong wind pressure of the air that intersects at the tip of the cutting blade will make it easier for them to be sent to the cross-feed auger at the rear of the platform without falling below the platform. Furthermore, if the pair of branch pipes in each set are arranged so that their tips face in the direction that they approach each other so that the air sprayed out in a carpet-like manner from the slit-shaped outlet holes at the tip of each set intersects at the tip of the cutting blade, as the cutting blade approaches the beans during cutting, the part of the pair of branch pipes in each set that bends toward the cutting blade located at the rear and below will press diagonally against the area near the base of the beans, guiding them to a predetermined cutting position on the cutting blade where the air sprayed out in a carpet-like manner intersects.At this time, the pair of branch pipes hardly collide with the beans and pods of the adzuki beans in each ridge, and the force of collision with the beans and pods is weakened by passing through both sides of the beans or by oblique pressure from the parts of the branch pipes that are bent toward the cutting blade, so that beans hardly pop out of the pods of the adzuki beans cultivated in each ridge.

[0043] Furthermore, if the agricultural grain harvesting auxiliary mechanism for a large combine harvester of the present invention is configured with a branch pipe tilt / position adjustment structure that allows the tilt and height position of the branch pipe tips to be freely adjusted relative to the blade within a specified range from a height position near the blade to 100 cm above the blade, when harvesting pulses such as soybeans and adzuki beans in a field where weeds are still present, even if the beans and pods cut by the blades are blocked by the cut weeds from moving from the blades toward the lateral feed auger at the rear of the platform, the cut beans and pods will be sprayed out in a carpet-like manner from the slit-shaped outlet holes at the tips of the pair of branch pipes at a height position near the blades (a specified height position of 0 to several cm above the blades) to 100 cm above the blades, and the strong wind pressure of the air that intersects at the tips of the blades will make it easier for them to be sent to the lateral feed auger at the rear of the platform without falling below. Therefore, without equipping a raking reel, it is possible to harvest beans such as soybeans and adzuki beans even when weeds remain in the field, while significantly reducing harvest loss due to falling beans and pods compared to a configuration equipped with a raking reel.

[0044] Furthermore, by configuring the large combine harvester of the present invention with a branch pipe direction / spacing adjustment structure for adjusting the spacing between each branch pipe connected to the main pipe and the approximately horizontal orientation of the tip of the branch pipe, as in the agricultural grain harvesting assistance mechanism, it is possible to prevent the branch pipes from colliding with the beans and pods just before harvesting, regardless of the variety of row widths used for sowing. The branch pipes are attached so that air from a pair of branch pipes sprays out in a carpet shape and intersects with the tips of the cutting blades over beans such as azuki beans sown and cultivated in a single furrow. By adjusting the direction of the tips, regardless of the furrow width of the sowed beans, it is possible to reduce the falling of beans and pods when harvesting, such as when beans pop out of the pods due to their own weight or the impact of contact with the cutting blades or the tines of the raking reel. It is also possible to send air so that the harvested beans, such as azuki beans, are more reliably sent to the horizontal feed auger at the rear of the platform, significantly reducing harvest loss. Furthermore, a large combine harvester can harvest large amounts of beans, such as azuki beans, at once, significantly reducing working time and significantly increasing harvesting efficiency.

[0045] Furthermore, in the agricultural grain harvesting auxiliary mechanism for a large combine harvester of the present invention, the reel support arm and the ventilation pipe support member that supports the ventilation pipe are preferably attached to different members on the platform, and the following can be performed independently of one another: adjustment of the tilt and height position of the tip of the branch pipe relative to the cutting blade using the branch pipe tilt / position adjustment structure; adjustment of the spacing between the branch pipes connected to the main pipe and the approximately horizontal orientation of the tip of the branch pipe using the branch pipe orientation / spacing adjustment structure; and adjustment of the position of the take-up reel using the take-up reel position adjustment means.

[0046] The inventors conducted further tests on the agricultural grain harvesting assistance mechanism of large combine harvesters and found that if the raking reel support arm and the ventilation pipe support member that supports the ventilation pipe are attached integrally to the same member on the platform, when the position of the raking reel is adjusted using the raking reel position adjustment means, the inclination and height position of the tip of the branch pipe relative to the cutting blade also changes, making it difficult to adjust both the raking reel and the branch pipe to the optimal positions, which is an issue that needs improvement. However, in the agricultural grain harvesting assist mechanism for a large combine harvester of the present invention, the reel support arm and the ventilation pipe support member that supports the ventilation pipe are attached to different members on the platform, and the adjustment of the tilt and height position of the tip of the branch pipe relative to the cutting blade using the branch pipe tilt / position adjustment structure, the adjustment of the spacing between each branch pipe connected to the main pipe and the approximately horizontal orientation of the tip of the branch pipe using the branch pipe orientation / spacing adjustment structure, and the adjustment of the position of the scooping reel using the scooping reel position adjustment means can be performed independently of one another.This means that even if the position of the scooping reel is adjusted using the scooping reel position adjustment means, the tilt and height position of the tip of the branch pipe relative to the cutting blade do not change, and so the scooping reel and branch pipe can be adjusted to optimal positions for each harvest depending on the agricultural grain to be harvested, such as pulses such as soybeans and adzuki beans, or wheat.

[0047] Furthermore, in the agricultural grain harvesting auxiliary mechanism for a large combine harvester of the present invention, the tilt and position adjustment structure of the branch pipe is preferably further configured to enable free adjustment of the distance between the tip of the branch pipe and the cutting blade. Depending on the width of the rows of the crops to be harvested, such as soybeans, adzuki beans, and other beans, or wheat, it may be necessary to adjust the distance between the tips of the branch pipes and the cutting blade in order to adjust the spacing between the branch pipes and the approximately horizontal orientation of the tips of the branch pipes so that the air from the pair of branch pipes sprays out in a carpet-like pattern and intersects with the adzuki beans, etc., sown and cultivated in one row, at the tip of the cutting blade. However, in the agricultural grain harvesting auxiliary mechanism for a large combine harvester of the present invention, if the branch pipe tilt / position adjustment structure is configured so that the distance between the tip of the branch pipe and the cutting blade can be freely adjusted, the distance between the tip of the branch pipe and the cutting blade can be adjusted to an optimum distance when harvesting depending on the row width of the agricultural grain to be harvested, such as beans such as soybeans and adzuki beans, or wheat, and the distance between the branch pipes and the approximately horizontal orientation of the tip of the branch pipe can be adjusted to an optimum distance and orientation.

[0048] Furthermore, in the agricultural grain harvesting auxiliary mechanism for a large combine harvester of the present invention, the branch pipe tilt / position adjustment structure preferably has an automatic branch pipe tip / cutting blade distance adjustment means that automatically adjusts the distance between the tip of the branch pipe and the cutting blade. In order to adjust the distance between the tip of the branch pipe and the cutting blade, it is necessary to adjust the position of the support member that supports the air supply pipe relative to the platform, but this work is a heavy burden. However, in the agricultural grain harvesting auxiliary mechanism of the large combine of the present invention, if the branch pipe tilt / position adjustment structure is configured to have an automatic branch pipe tip / blade spacing adjustment means that automatically adjusts the spacing between the tip of the branch pipe and the cutting blade, the workload for adjusting the spacing between the branch pipe tip and the cutting blade can be significantly reduced.

[0049] Furthermore, the agricultural grain harvesting auxiliary mechanism for a large combine harvester of the present invention is preferably configured so that the approximately horizontal orientation of the tip ends of all pairs of branch pipes can be adjusted simultaneously. The work of adjusting the approximately horizontal orientation of each branch pipe requires a lot of time and effort. Furthermore, to harvest a large amount of beans such as adzuki beans at once using a large combine harvester without loss, it is necessary to adjust the approximately horizontal orientation of the tips of many pairs of branch pipes corresponding to many ridges, which makes the work burden of adjusting the approximately horizontal orientation of the branch pipes extremely large. However, if the agricultural grain harvesting auxiliary mechanism of the large combine of the present invention is configured so that the approximately horizontal orientation of the tip ends of all pairs of branch pipes can be adjusted simultaneously, the workload for adjusting the approximately horizontal orientation of the tip ends of the branch pipes can be significantly reduced.

[0050] The large combine harvester of the present invention is a large combine harvester equipped with a traveling section, a reaping section that reaps agricultural grain while being traveled by the traveling section, a pair of reel support arms for attaching a raking reel, and a raking reel position adjustment means, the reaping section having a cutting blade that is provided on the front lower edge of a platform and that reaps agricultural grain, the large combine harvester also comprising: a shaft member that connects to a predetermined rotary drive shaft provided on the large combine harvester; a centrifugal type air blower that is driven by rotation of the shaft member; and air blowing piping that is connected to an outlet of the centrifugal type air blower and has a main pipe that has a portion that is arranged in front of and above the cutting blade and is generally parallel to the cutting blade, and has a plurality of pairs of branch pipes that are connected to the portions of the main pipe that are arranged generally parallel to the cutting blade at a predetermined interval, and adjacent branch pipes in adjacent pairs are arranged close to each other, and each of the branch pipes bends toward the cutting blade that is located rearward and below, and each of the The tips of the branch pipes are formed with a narrower pipe in the vertical direction so that air is sprayed in a carpet-like manner toward a predetermined range that covers some of the divided areas divided in the width direction of the area where the cutting blade is provided according to the number of branch pipes, and have slit-shaped nozzles that open to the front and sides. The pair of branch pipes in each set are arranged so that their tips approach each other so that the air sprayed in a carpet-like manner from the slit-shaped nozzles at their respective tips intersect at the tip of the cutting blade. The agricultural grain harvesting assist mechanism further includes a branch pipe inclination / position adjustment structure for freely adjusting the inclination and height position of the tip of the branch pipe with respect to the cutting blade within a predetermined range from a height position near the cutting blade to 100 cm above the blade, and a branch pipe orientation / spacing adjustment structure for adjusting the spacing between the branch pipes connected to the main pipe and the approximately horizontal orientation of the tip of the branch pipe.

[0051] Like the large combine harvester of the present invention, the large combine harvester is equipped with a main pipe connected to the outlet of the centrifugal type air blower and having a portion disposed substantially parallel to the cutting blade in front of and above the cutting blade, and a plurality of pairs of branch pipes each connected at a predetermined interval to the portion of the main pipe disposed substantially parallel to the cutting blade, and adjacent branch pipes in adjacent pairs are disposed close to each other, and each branch pipe is bent toward the cutting blade located rearward and below, and the tip of each branch pipe is formed so that the pipe is narrowed in the vertical direction so that air is sprayed in a carpet-like manner toward a predetermined range that covers a portion of the divided areas divided in the width direction of the area where the cutting blade is provided according to the number of branch pipes, and has slit-shaped ejection holes that open to the front and sides. Furthermore, if the pair of branch pipes in each set are configured so that their tips face each other in a direction that allows the air sprayed in a carpet-like manner from the slit-shaped nozzles at their respective tips to intersect at the tip of the cutting blade, beans that are ejected from the pods due to the impact when soybeans, adzuki beans, and other beans are cut by the cutting blade 22, and beans and pods that tend to fall under their own weight will be sprayed in a carpet-like manner from the slit-shaped nozzles at the tips of the pair of branch pipes in each set toward a predetermined range that covers a portion of the divided area that is divided in the width direction of the area where the cutting blade is located according to the number of branch pipes, and the strong wind pressure of the air that intersects at the tip of the cutting blade will make it easier for them to be sent to the cross-feed auger at the rear of the platform without falling below the platform. Furthermore, if the pair of branch pipes in each set are arranged so that their tips face in the direction that they approach each other so that the air sprayed out in a carpet-like manner from the slit-shaped outlet holes at the tip of each set intersects at the tip of the cutting blade, as the cutting blade approaches the beans during cutting, the part of the pair of branch pipes in each set that bends toward the cutting blade located at the rear and below will press diagonally against the area near the base of the beans, guiding them to a predetermined cutting position on the cutting blade where the air sprayed out in a carpet-like manner intersects.At this time, the pair of branch pipes hardly collide with the beans and pods of the adzuki beans in each ridge, and the force of collision with the beans and pods is weakened by passing through both sides of the beans or by oblique pressure from the parts of the branch pipes that are bent toward the cutting blade, so that beans hardly pop out of the pods of the adzuki beans cultivated in each ridge.

[0052] Furthermore, if the large combine harvester of the present invention is configured with a branch pipe tilt / position adjustment structure that allows the tilt and height position of the branch pipe tips relative to the cutting blade to be freely adjusted within a specified range from a height position near the cutting blade to 100 cm above the cutting blade, when harvesting pulses such as soybeans and adzuki beans in a field where weeds are still present, even if the beans and pods cut by the cutting blades are blocked by the cut weeds from moving from the position of the cutting blades toward the lateral feed auger at the rear of the platform, the cut beans and pods will be sprayed out in a carpet-like manner from the slit-shaped outlet holes at the tips of the pair of branch pipes at a height position near the cutting blades (a specified height position of 0 to several cm above the cutting blades) to 100 cm above the cutting blades, and the strong wind pressure of the air that intersects at the tips of the cutting blades will make it easier for them to be sent to the lateral feed auger at the rear of the platform without falling below the platform. Therefore, without equipping a raking reel, it is possible to harvest beans such as soybeans and adzuki beans even when weeds remain in the field, while significantly reducing harvest loss due to falling beans and pods compared to a configuration equipped with a raking reel.

[0053] Furthermore, by configuring the large combine harvester of the present invention with a branch pipe direction / spacing adjustment structure for adjusting the spacing between each branch pipe connected to the main pipe and the approximately horizontal orientation of the tip of the branch pipe, it is possible to prevent the branch pipes from colliding with the beans and pods just before harvesting, regardless of the variety of row widths used for sowing. In addition, by attaching the branch pipes and adjusting the direction of the tips so that air is sprayed in a carpet shape from a pair of branch pipes and intersects with the tips of the cutting blades on beans such as azuki beans sown and cultivated in one furrow, regardless of the sowing width, it is possible to reduce the falling of beans and pods when harvesting, such as when beans pop out of the pods due to their own weight or the impact of contact with the cutting blades or the tines of the raking reel, and it is possible to send air so that the harvested beans, such as azuki beans, are more reliably sent to the lateral feed auger at the rear of the platform, making it possible to significantly reduce harvest loss.Furthermore, large quantities of beans, such as azuki beans, can be harvested at once with a large combine harvester, significantly reducing working time and greatly improving harvesting efficiency.

[0054] Furthermore, in the large combine harvester of the present invention, the agricultural grain harvesting auxiliary mechanism is preferably configured so that the reel support arm and the ventilation pipe support member that supports the ventilation pipe are attached to different members on the platform, and the branch pipe tilt / position adjustment structure can adjust the tilt and height position of the tip of the branch pipe relative to the cutting blade, the branch pipe orientation / spacing adjustment structure can adjust the spacing between the branch pipes connected to the main pipe and the approximately horizontal orientation of the tip of the branch pipe, and the scavenging reel position adjustment means can adjust the position of the scavenging reel independently of one another. With this configuration, even if the position of the raking reel is adjusted using the raking reel position adjustment means, the inclination or height position of the tip of the branch pipe relative to the cutting blade does not change, so the raking reel and branch pipe can be adjusted to the optimal positions when harvesting depending on the agricultural grain to be harvested, such as beans such as soybeans and adzuki beans, or wheat.

[0055] Furthermore, in the large combine harvester of the present invention, the agricultural grain harvesting auxiliary mechanism is preferably configured so that the tilt and position adjustment structure of the branch pipe can further freely adjust the distance between the tip of the branch pipe and the cutting blade. With this configuration, the distance between the tip of the branch pipe and the cutting blade can be adjusted to an optimum distance when cutting depending on the crop to be harvested, such as beans such as soybeans and adzuki beans, or wheat, and the distance between the branch pipes and the approximately horizontal orientation of the tips of the branch pipes can be adjusted to an optimum distance and orientation.

[0056] Furthermore, in the large combine harvester of the present invention, the agricultural grain harvesting auxiliary mechanism preferably has an automatic branch pipe tip / blade spacing adjustment means in which the branch pipe tilt / position adjustment structure automatically adjusts the spacing between the tip of the branch pipe and the cutting blade. With this configuration, the workload for adjusting the distance between the tip of the branch pipe and the cutting blade can be significantly reduced.

[0057] In the large combine harvester of the present invention, the surface of the front lower edge of the platform having the cutting blade in the cutting section is preferably formed as a flat surface from the cutting blade toward the lateral feed auger. In existing large combine harvesters, there is a step of about 1 to several centimeters between the surface of the platform immediately behind the reaping section and the surface of the platform behind it. When harvesting wheat, the stalks are quite long, so when the base of the stalk is cut with the cutting blade, the cut stalk easily overcomes the step and is sent to the cross-feed auger, so no problems occur. However, when harvesting beans, when the pods and stems containing the pods are cut with the cutting blade, some pods are unable to overcome the step because the cut pods and stems containing the pods are short, and the pods collide with the step, causing the beans to pop out of the pods, or they fall without being sent to the horizontal feed auger, resulting in a loss of harvest. However, in the large combine of the present invention, if the surface of the front lower edge of the platform equipped with the cutting blade in the cutting section is formed into a flat surface from the cutting blade toward the cross-feed auger, when harvesting beans, when the pods and stem portions containing the pods are cut with the cutting blade, the cut pods can be avoided from colliding with steps and can be easily sent to the cross-feed auger, thereby further reducing harvest loss.

[0058] In addition, the large combine harvester of the present invention preferably has a conveying section equipped with a conveyor for transporting the agricultural grain harvested by the harvesting section, a threshing section equipped with a thresher for threshing the transported agricultural grain, a sorting section arranged below the thresher for shaking the agricultural grain transported by the conveying section and threshed in the threshing section to separate it into grains and other debris, and a feed pan arranged between the conveying section and the sorting section for receiving the threshed agricultural grain and removing husks and debris with air blown in by a cleaning fan, the feed pan being configured to have a surface that slopes gently downward from the end of the conveying section to a predetermined position toward the sorting section. The feed pans in existing large combine harvesters have an upward slope from the conveying section to the sorting section, and when threshing azuki beans, grains and debris tend to accumulate near the end of the feed pan on the conveying section side.If excessive accumulation occurs, problems such as breakdowns can easily occur in the rocking means that rocks the feed pan or in the conveying section. However, in the large combine of the present invention, if the feed pan is configured to have a gently downward sloping surface between the end of the conveying section and a predetermined position toward the sorting section, even when threshing azuki beans, grains and debris are less likely to accumulate at the end of the conveying section of the feed pan, thereby preventing malfunctions.

[0059] Furthermore, in the large combine harvester of the present invention, the agricultural grain harvesting auxiliary mechanism is preferably configured such that the branch pipe direction / spacing adjustment structure is capable of simultaneously adjusting the approximately horizontal direction of the tip ends of all pairs of branch pipes. With this configuration, the workload for adjusting the orientation of the tip end of the branch pipe in the substantially horizontal direction can be significantly reduced.

[0060] In addition, the large combine of the present invention preferably comprises a transport section equipped with a conveyor for transporting the agricultural grain harvested by the harvesting section, a threshing section equipped with a thresher for threshing the transported agricultural grain, a sorting section arranged below the threshing section for shaking the agricultural grain transported by the transport section and threshed in the threshing section to separate it into grains and other waste, and a straw waste processing section for shredding the straw discharged by the threshing section, and the covers covering the sides and rear of the combine can be removed, exposing the drive mechanism and piping, and each of the transport section, threshing section, sorting section and straw waste processing section is equipped with a window of a predetermined size and shape that allows the internal processing status to be observed from the outside and that allows work to be performed from the outside to resolve blockages, malfunctions and other internal problems. After beans such as adzuki beans are harvested in the harvesting section, mechanical malfunctions can occur in the conveying section, threshing section, sorting section, and straw removal section due to clogging with pods or beans, which can result in harvest losses and reduced harvesting efficiency. Some conventional large combine harvesters are equipped with imaging means for capturing images of the interior spaces of the walls surrounding the conveying section, threshing section, sorting section, etc., allowing the processing status to be observed from a monitor in the driver's seat, but none allow observation from the outside. Furthermore, in conventional large combine harvesters, even if a problem such as a blockage in the conveying section, threshing section, sorting section, etc. can be confirmed from the monitor in the driver's seat, it is necessary to remove large components to resolve the problem, which requires a lot of work and time. However, in the large combine of the present invention, the covers covering the sides and rear of the combine can be removed, exposing the drive mechanism and piping, and each of the conveying section, threshing section, sorting section, and straw disposal section is equipped with windows of a predetermined size and shape that allow the internal processing status to be observed from the outside, and that allow work to be done from the outside to resolve blockages, malfunctions, and other internal malfunctions.This means that internal malfunctions can be discovered from the outside, and malfunctions such as blockages can be dealt with from the outside without the need to remove large components, preventing harvest loss and a deterioration in harvesting efficiency, and significantly reducing the workload and time required to resolve blockages, malfunctions, and other internal malfunctions.

[0061] In addition, in the large combine of the present invention, the surfaces of each component present inside the conveying section, the threshing section, the sorting section, and the straw disposal section are preferably coated with an antistatic film or an anti-adhesion film. When harvesting various types of agricultural grains, including soybeans, adzuki beans, wheat, and buckwheat, and when switching from harvesting one type of grain to another, it is necessary to clean the components inside the conveying section, threshing section, sorting section, and straw disposal section to prevent residue from the previously harvested grain from getting mixed in. With conventional large combine harvesters, cleaning the components inside the conveying section, threshing section, sorting section, and straw disposal section required the removal of large components, which was labor-intensive and time-consuming. However, in the large combine harvester of the present invention, if the surfaces of each component inside the conveying section, threshing section, sorting section, and straw waste processing section are coated with an antistatic film, grains, straw waste, other dust, and other particles are less likely to become statically charged. As a result, they are less likely to adhere to the surfaces of each component, and problems caused by the accumulation of particles can be suppressed. Furthermore, even if grains, straw waste, other dust, and other particles adhere to the surfaces of each component, the particles can be easily removed by spraying air from the above-mentioned window using the air blowing device, without the need for the complicated removal of components. Furthermore, if the surfaces of each component inside the conveying section, threshing section, sorting section, and straw disposal section are coated with an anti-adhesion film, even if grains, straw, or other dust particles adhere to the surface of each component, the particles can be easily removed by washing them with water using a water washing device through the window described above, without having to remove any major components. Therefore, by configuring the large combine harvester of the present invention, the workload and time required for cleaning the various components inside the conveying section, threshing section, sorting section, and straw disposal section can be significantly reduced when switching from harvesting one type of agricultural grain to harvesting another type of agricultural grain.

[0062] Therefore, according to the present invention, in a large combine harvester equipped with a reaping section for reaping agricultural grains, the reaping section having a reaping blade, a raking reel, and an air jetting device, the air jetting device having a main pipe and a number of branch pipes each connected to the main pipe at a predetermined interval and jetting air from the tip thereof toward the reaping blade, regardless of whether sowing is performed with various row widths, the branch pipes do not collide with the beans and pods immediately before reaping beans such as soybeans and adzuki beans, and the weight of the beans and pods when reaped and the tines of the raking reel when reaping beans such as soybeans and adzuki beans are not connected to the tines of the reaping blade or the raking reel. The present invention provides a large combine harvester equipped with an agricultural grain harvesting auxiliary mechanism that reduces the falling of beans and pods due to the beans popping out due to the impact when touched, ejects air so that the harvested beans such as adzuki beans can be reliably sent to the horizontal feed auger at the rear of the platform, and harvests a large amount of beans such as adzuki beans grown on many ridges at once while significantly reducing loss of harvest yield, significantly improves harvesting work efficiency, significantly shortens harvesting time, and is also capable of successfully harvesting wheat.

[0063] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First embodiment FIG. 1 is an explanatory diagram showing the configuration of devices and components related to air ejection provided in a crop harvesting auxiliary mechanism for a large combine harvester according to a first embodiment of the present invention. (a) is a schematic diagram showing the arrangement of multiple pairs of branch pipes connected to a main pipe using a branch pipe direction / spacing adjustment structure according to a first configuration example, and (b) is a schematic diagram viewed from the side. FIG. 2 is an explanatory diagram showing the configuration of the tip of a branch pipe provided in a crop harvesting auxiliary mechanism for a large combine harvester according to the first embodiment. (a) is a side view with the cutting blade side on the right side of the page, (b) is a partially enlarged cross-sectional view, (c) is a partially enlarged view as viewed from diagonally above, and (d) is a front view of the tip of the branch pipe. FIG. 3 is a partial perspective view showing a state in which a branch pipe is attached to a main pipe using a branch pipe direction / spacing adjustment structure according to a first configuration example provided in a crop harvesting auxiliary mechanism for a large combine harvester according to the first embodiment. Figure 4 is an explanatory diagram showing the schematic configuration of the main parts of the branch pipe direction / spacing adjustment structure of the first configuration example provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester of the first embodiment, (a) shows the plate belt provided on the branch pipe connecting / fixing member in the branch pipe direction / spacing adjustment structure of the first configuration example from the side where it is attached to the main pipe, and is also a diagram showing a schematic view of the shape of the end of the branch pipe on the connection side to the main pipe, (b) is a diagram showing the configuration of the U-shaped bolt provided on the branch pipe connecting / fixing member, and (c) is a partially enlarged cross-sectional view showing the fitting state of the plate belt and branch pipes and the fitting state of the branch pipe with the mounting hole of the main pipe when the plate belt with the branch pipe fitted in it is attached to the main pipe.

[0064] Fig. 5 is a schematic diagram showing the arrangement of multiple pairs of branch pipes connected to a main pipe using a branch pipe direction / spacing adjustment structure of a second configuration example provided in the agricultural grain harvesting auxiliary mechanism of a large combine harvester according to the first embodiment. Fig. 6 is an explanatory diagram showing the general configuration of a main part of a branch pipe direction / spacing adjustment structure of a second configuration example provided in the agricultural grain harvesting auxiliary mechanism of a large combine harvester according to the first embodiment. Fig. 7 is an explanatory diagram showing the main part configuration of the main pipe and the branch pipes in the branch pipe direction / spacing adjustment structure of a second configuration example provided in the agricultural grain harvesting auxiliary mechanism of a large combine harvester according to the first embodiment, where (a) is a partial plan view showing the side where the branch pipe of the main pipe is attached, (b) is an enlarged AA cross-sectional view of (a), (c) is a side view of one branch pipe, and (d) is an enlarged BB cross-sectional view of (c). Fig. 8 is an explanatory diagram showing the configuration of a plate-shaped base member provided in a branch pipe connection unit in a branch pipe direction / spacing adjustment structure of a second configuration example provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester of the first embodiment, (a) is a plan view, and (b) is a CC cross-sectional view of (a). Fig. 9 is an explanatory diagram showing the configuration of an annular member provided in a branch pipe connection unit in a branch pipe direction / spacing adjustment structure of a second configuration example provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester of the first embodiment, (a) is a plan view, (b) is a side view, (c) is a view showing a state in which a pair of annular members are provided on the plate-shaped base member in the DD cross-section of (a), and (d) is a cross-sectional view showing a first female screw portion in a state in which a branch pipe is screwed. Fig. 10 is an explanatory diagram showing the configuration of an annular member fixing member provided in a branch pipe connection unit in a branch pipe direction / spacing adjustment structure of a second configuration example provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester of the first embodiment, (a) is a plan view showing the positional relationship of the rotation amount adjustment portion of the annular member with respect to the guide hole, and (b) is a cross-sectional view showing the positional relationship with the annular member provided on the plate-shaped base member. Fig. 11 is an explanatory diagram showing the configuration of a branch pipe connection unit fixing member in a branch pipe direction / spacing adjustment structure of a second configuration example provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester of the first embodiment, (a) is a diagram showing the configuration of the plate belt, and (b) is a diagram showing the configuration of the U-bolt.Fig. 12 is an explanatory diagram showing the main parts of the branch pipe tilt / position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester of the first embodiment, (a) is a schematic diagram showing the positional relationship between a pair of reel support arms and a ventilation pipe support member that supports the ventilation pipe from the front side of the platform, and (b) is a schematic diagram seen from the side. Fig. 13 is a partial explanatory diagram showing the positional relationship between a pair of reel support arms and a ventilation pipe support member that supports the ventilation pipe from an oblique front view in the branch pipe tilt / position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism of the large combine harvester of the first embodiment. For convenience, the same components as those in the large combine harvester shown in FIGS. 26 to 31 are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0065] Devices and components related to air ejection in the first embodiment The agricultural grain reaping assist mechanism 1 of a large combine harvester according to the first embodiment includes, for example, a shaft member 2, a centrifugal type air blower 3, and air blowing piping 4, as shown in FIG. The shaft member 2 is connected to a boss X1 provided at the end of a predetermined rotating drive shaft X that transmits power from the engine of the combine to a predetermined power transmission mechanism (not shown) for driving the clipper-shaped cutting blades. The centrifugal blower 3 includes a rotational force transmission mechanism including pulleys 3a1-3a4 and belts 3b1 and 3b2, an impeller (not shown) configured to draw in air from the axial direction by rotation and discharge it in a predetermined centrifugal direction (here, the direction of outlet 3c1), a case 3c that covers the impeller and has outlet 3c1 in the centrifugal direction, and an intake unit 3d that draws in air from the outside. The centrifugal blower 3 is provided behind the platform 21 of the reaping unit 20 and is fixed by a fixing member (not shown). The centrifugal blower 3 is configured to be driven by the rotation of the shaft member. The rotational force transmission mechanism of the centrifugal blower 3 may be configured in any way as long as it can rotate the impeller (not shown) in a direction that draws in air from the axial direction through the intake section 3d and discharges it in a predetermined centrifugal direction (here, the direction of the exhaust port 3c1) by rotating the shaft member 2. Furthermore, the impeller (not shown) in the case 3c may have any shape as long as it takes in air from the axial direction and discharges it in a predetermined centrifugal direction (here, the direction of the discharge port 3c1).

[0066] The air supply piping 4 has a main piping 4a formed by connecting a hose and a pipe, and a pair of branch pipes 4b each branching from the main piping 4a.

[0067] One end of the main pipe 4a is connected to the outlet 3c1 of the centrifugal blower 3. The other end of the main pipe 4a is closed by, for example, a lid 4c. The lid 4c is formed with a fixing portion 4c1 for fixing the lid 4c to a predetermined position behind the platform 21 of the reaping unit 20 of the combine. The main pipe 4a is disposed in front of and above the cutting blade 22 and has a portion 4a1 disposed substantially parallel to the cutting blade 22.

[0068] The multiple pairs of branch pipes 4b are each connected at a predetermined interval to a portion 4a1 of the main pipe 4a that is arranged approximately parallel to the cutting blade 22, and adjacent branch pipes 4b in adjacent pairs are arranged close to each other. Each branch pipe 4b is bent toward the cutting blade 22 located rearward and downward. Also, for example, as shown in FIG. 2, the tip 4b1 of each branch pipe 4b is narrowed in the vertical direction of the pipe so that air is sprayed in a carpet-like manner toward a predetermined range that covers a portion of the divided area divided in the width direction of the area where the cutting blade 22 is provided according to the number of branch pipes, and has slit-shaped ejection holes 4b1a that open to the front and sides. In addition, the pair of branch pipes 4b in each set are arranged so that their tips approach each other so that the air ejected in a carpet-like manner from the slit-shaped outlet holes 4b1a of each tip 4b1 intersects at the tip position of the cutting blade 22, as shown in Figure 1(a), for example.

[0069] Branch pipe direction / spacing adjustment structure of first configuration example in first embodiment Moreover, the agricultural grain reaping auxiliary mechanism 1 of the large combine harvester of the first embodiment is provided with the branch pipe direction and spacing adjustment structure of the first configuration example. The branch pipe direction / spacing adjustment structure of the first configuration example has, for example, as shown in Figures 3 and 4, a branch pipe connecting / fixing member 91 having a male screw portion 4b2-1 provided on each branch pipe 4b and a female screw portion 91a3 to which the branch pipe 4b can be attached and detached, and is configured so that the spacing between each branch pipe 4b connected to the main pipe 4a and the approximately horizontal orientation of the tip portion 4b1 of the branch pipe 4b can be adjusted.

[0070] The male screw portion 4b2-1 is provided on an end portion 4b2 of each branch pipe 4b on the side where the branch pipe 4b is connected to the main pipe 4a, as shown in FIG. 4(a), for example. The branch pipe connecting and fixing member 91 has, for example, a plate belt 91a and a U-bolt 91b as shown in Figures 4(a) and 4(b), and is configured to fix each branch pipe 4b in a state in which it communicates with a mounting hole (reference numeral omitted) of the main pipe 4a as shown in Figure 4(c).

[0071] In detail, as shown in FIG. 4(a), the plate-shaped belt 91a has, in the longitudinal center, a female screw portion 91a3 formed to a predetermined size corresponding to the pipe diameter of the end portion 4b2 of the branch pipe 4b on the connection side (with the main pipe 4a).

[0072] The U-bolt 91b is configured to join both ends 91a1, 91a2 of the plate belt 91a, thereby keeping the plate belt 91a, to which the branch pipe 4b is attached, fixed to the main pipe 4a. Among the mounting holes for attaching the branch pipe 4b provided on the main pipe 4a, the mounting holes (reference numerals omitted) that are not the mounting target are configured to be able to be covered with a predetermined cover member (not shown).

[0073] The branch pipe 4b can be connected and fixed to the mounting hole (numeral omitted) of the main pipe 4a using the branch pipe connecting and fixing member 91 by aligning the plate belt 91a, with the male screw portion 4b2-1 of the branch pipe 4b screwed into the female screw portion 91a3, so that it communicates with the mounting hole (numeral omitted) of the main pipe 4a, and wrapping it around the main pipe 4a, and then screwing and joining the U-bolt 91b to both ends 91a1, 91a2 of the plate belt 91a via a nut (not shown).

[0074] Branch pipe direction and spacing adjustment structure of second configuration example in first embodiment Furthermore, the agricultural grain reaping auxiliary mechanism 1 of the large combine harvester of the first embodiment may be configured to include the branch pipe direction and spacing adjustment structure of the second configuration example. The agricultural grain harvesting assist mechanism 1 of the large combine harvester of the first embodiment equipped with the branch pipe direction / spacing adjustment structure of the second configuration example is equipped with a traveling section (reference numeral omitted) and a harvesting section 20 that harvests agricultural grain while being moved by the traveling section, as shown in Figures 30 and 31, for example, and the harvesting section 20 is equipped with a cutting blade 22, a raking reel 23, and air supply piping 4, and as shown in Figure 5, for example, the air supply piping 4 is connected to a centrifugal type air blower 3, and has a main pipe 4a having a portion 4a1 that is arranged in front of and above the cutting blade 22 and approximately parallel to the cutting blade, and a number of elongated branch pipes 4b that are connected to the portion 4a1 of the main pipe 4a that is arranged approximately parallel to the cutting blade 22 at predetermined intervals, bent near the tip portion 4b1 toward the cutting blade 22 located rearward and below, and spray air in an approximately horizontal direction from the tip portion 4b1 toward the cutting blade 22. The configuration of the tip 4b1 of the branch pipe 4b is substantially the same as that in the first configuration example shown in FIGS. The branch pipe direction / spacing adjustment structure of the second configuration example, as shown in Figure 6, has an elongated hole portion 4a1-1 formed in the main pipe 4a, a first male thread portion 4b2-1 provided on each branch pipe 4b, a plurality of branch pipe connection units 100 to which a pair of branch pipes 4b can be attached and detached, and a branch pipe connection unit fixing member 101, and is configured so that the spacing between each branch pipe 4b connected to the main pipe 4a and the approximately horizontal orientation of the tip portions 4b1 of the branch pipes 4b can be adjusted.

[0075] The long hole portion 4a1-1 is formed in a portion 4a1 of the main pipe 4a that is arranged parallel to the cutting blade (not shown), as shown in Figures 7(a) and 7(b), and is large enough to surround the connection portions of a number of branch pipes 4b that are connected to each other at predetermined intervals.

[0076] The first male screw portion 4b2-1 is provided on an end portion 4b2 of each branch pipe 4b on the side where the branch pipe 4b is connected to the main pipe 4a, as shown in, for example, FIGS. 7(c) and 7(d).

[0077] The branch pipe connection unit 100 is configured to include a plate-shaped base member 100a, a pair of annular members 100b, and an annular member fixing member 100c.

[0078] 8(a) and 8(b), the plate-shaped base member 100a has an outer shape large enough to cover a portion of the elongated hole 4a1-1 formed in the main pipe 4a. The plate-shaped base member 100a has a pair of holes 100a1 formed in the longitudinal center thereof with a predetermined size corresponding to the pipe diameter of the end 4b2 of the branch pipe 4b on the connection side (with the main pipe 4a). Furthermore, the plate-like base member 100a has a predetermined distance of about 40 to 50 cm from the longitudinal center position to each of the longitudinal edge portions.

[0079] 9(a) to 9(c), the pair of annular members 100b are configured to have a cylindrical portion 100b1 and flange portions 100b2 on both ends of the cylindrical portion 100b1, and are rotatably and non-detachably provided in respective holes 100a1 formed in the respective plate-like base members 100a. Also, as shown in FIG. 9(d), for example, the pair of annular members 100b have a pair of first female screw portions 100b3 on the inner periphery that can screw into first male screw portions 4b2-1 provided on the end portion 4b2 of the branch pipe 4b on the connection side (with the main pipe 4a). Furthermore, the pair of annular members 100b are provided at their upper edges with rotation amount adjustment portions 100b4. The rotation amount adjustment portions 100b4 have arc-shaped guide holes 100b4-1 formed at predetermined positions on a circle concentric with the rotation path of the annular members 100b.

[0080] 10(a) and 10(b), the annular member fixing member 100c includes a second female screw portion 100c1 provided on the track of the guide hole 100b4-1 of the rotation amount adjustment portion 100b4 of each annular member 100b in each plate-shaped base member 100a, a second male screw portion 100c2 that screws into the second female screw portion 100c1, and a head portion 100c3 provided at the base of the second male screw portion 100c2. The annular member 100b is fixed to the plate-shaped base member 100a by tightening the rotation amount adjustment portion 100b4 via the head portion 100c3.

[0081] The branch pipe connection unit fixing member 101 has, for example, a plate belt 101a and a U-bolt 101b, as shown in Figures 11(a) and 11(b), and is configured so that each branch pipe connection unit 100 can be fixed to the main pipe 4a. The plate belt 101a is used to wrap and fix the plate-shaped base member 100a of the branch pipe connection unit 100 around the main pipe 4a. The U-bolt 101b is used to connect to both ends 101a1 and 101a2 of the plate belt 101a, thereby maintaining the branch pipe connection unit 100 fixed to the main pipe 4a. The branch pipe connection unit 100 can be fixed to the main pipe 4a using the branch pipe connection unit fixing member 101 by wrapping the plate belt 101 around the main pipe 4a so as to hold down the overlapping portions of the plate-shaped base members 100a of adjacent branch pipe connection units 100, which are arranged to cover the long hole portions 4a1-1 of the main pipe 4a, and then screwing and joining the U-shaped bolts 101b to both ends 101a1 and 101a2 of the plate belt 101a via nuts (not shown).

[0082] Branch pipe tilt / position adjustment structure in the first embodiment Moreover, the agricultural grain reaping auxiliary mechanism 1 of the large combine harvester of the first embodiment is provided with a structure for adjusting the inclination and position of the branch pipes. 12 and 13, the branch pipe tilt / position adjustment structure is such that both lower sides of a portion 4a1 of the main pipe 4a in the air supply pipe 4 that is disposed in front of and above the cutting blade 22 and generally parallel to the cutting blade are supported by, for example, a pair of reel support arms 23a for attaching the take-up reel shown in Figures 28 and 29 via a pair of air supply pipe support members 111. The take-up reel 23 shown in Figures 28 and 29 is provided with position adjustment means (not shown) on each of the pair of reel support arms 23a that can adjust the position up, down, front, and back using a conventionally known hydraulic cylinder or the like.

[0083] The branch pipe tilt / position adjustment structure is configured so that the tilt and height position of the tip 4b1 of the branch pipe 4b connected to the main pipe 4a, which is supported by a pair of reel support arms 23a via a pair of air supply pipe support members 111, can be freely adjusted to change the tilt and height position relative to the cutting blade 22 within a predetermined range from a height position near the cutting blade 22 (a height position in a predetermined range of 0 to several cm above the cutting blade 22) to 100 cm above the cutting blade 22, allowing air to be sprayed from the spray hole 4b1a.

[0084] Operation procedure for adjusting the direction, spacing, inclination, and position of branch pipes using the agricultural grain reaping auxiliary mechanism 1 of the large combine harvester of the first embodiment The following describes the procedure for adjusting the spacing between the multiple branch pipes 4b connected to the main pipe 4a and the approximately horizontal orientation of the tip end 4b1 of each branch pipe 4b using the agricultural grain harvesting auxiliary mechanism 1 of the large combine of the first embodiment configured in this manner. In the branch pipe direction / spacing adjustment structure of the first configuration example, first, the male thread portion 4b2-1 of the branch pipe 4b is screwed into the female thread portion 91a3. Next, the plate belt 91a, with the male thread portion 4b2-1 of the branch pipe 4b screwed into the female thread portion 91a3, is positioned so that it communicates with a desired mounting hole (reference numeral omitted) in the main pipe 4a and is wound around the main pipe 4a. Next, U-bolts 91b are screwed into both end portions 91a1 and 91a2 of the plate belt 91a via nuts (not shown) to join them. This operation is repeated until all the mounting holes provided at the mounting positions of the branch pipes 4b in the main pipe 4a are mounted. Furthermore, a predetermined cover member (not shown) is used to close the mounting holes (reference numerals omitted) in the main pipe 4a that are not the mounting target. This allows the intervals between the branch pipes 4b connected to the main pipe 4a to be adjusted to desired intervals. Next, the direction of the tip end 4b1 of each branch pipe 4b connected to the main pipe 4a is adjusted to be approximately horizontal. Next, a predetermined fixing member (not shown) is used to fix the state in which the male screw portion 4b2-1 of the branch pipe 4b, whose tip portion 4b1 has been adjusted to be in the substantially horizontal direction, is screwed into the female screw portion 91a3. This allows the approximately horizontal orientation of the tip 4b1 of the branch pipe 4b connected to the main pipe 4a to be adjusted to a desired orientation.

[0085] In addition, in the branch pipe direction / spacing adjustment structure of the second configuration example, first, the first male screw portion 4b2-1 of the branch pipe 4b is screwed into the first female screw portion 100b3 of a pair of annular members 100b that are rotatably and non-detachably provided on the plate-shaped base member 100a of each branch pipe connection unit 100. Next, a plurality of branch pipe connection units 100, each having the first male screw portion 4b2-1 of the branch pipe 4b screwed onto the first female screw portion 100b3 of the annular member 100b so as to close a predetermined region of the elongated hole 4a1-1 formed in the main pipe 4a, are stacked so that the first female screw portions 100b3 of adjacent branch pipe connection units 100 are spaced apart at a desired interval. Then, the branch pipe connection units 100 are fixed to the main pipe 4a via branch pipe connection unit fixing members 101. These steps are repeated until the entire area of ​​the elongated hole 4a1-1 formed in the main pipe 4a is blocked. At this time, there is a predetermined interval of about 40 to 50 cm from the longitudinal center position of the plate-like base member 100a to each longitudinal edge. Therefore, by attaching the branch pipe connection units 100 to the plate-like base members 100a of adjacent ones, the spacing between the branch pipes 4b connected to the main pipe 4a can be adjusted to any desired spacing, including 50 cm and 67 cm. Next, the rotation amount adjustment parts 100b4 of each branch pipe connection unit 100 fixed to the main pipe 4a are rotated a desired amount, and the annular members 100b are fixed via the annular member fixing members 100c. This makes it possible to adjust the orientation of the tip ends 4b1 of the branch pipes 4b connected to the main pipe 4a while attached to the plate-like base members 100a of adjacent branch pipe connection units 100 to a desired substantially horizontal orientation (an orientation that optimizes the amount of air sprayed from the tip ends 4b1 of the pair of branch pipes 4b in each set onto beans such as adzuki beans sown and cultivated in one furrow).

[0086] Flow of harvesting process of agricultural grain using the agricultural grain harvesting auxiliary mechanism 1 of the large combine of the first embodiment When the agricultural grain harvesting assist mechanism 1 of the first embodiment configured in this manner is mounted on the harvesting section of a large combine harvester as shown in Figures 26 to 31 and the engine is driven, the shaft member 2 connected to a boss X1 provided at the end of a predetermined rotary drive shaft X that transmits power to a predetermined power transmission mechanism (not shown) for driving the clipper-shaped cutting blades 22 rotates in synchronization with the rotary drive shaft X. Then, the rotation of the shaft member 2 drives the centrifugal type blower 3 via the rotational force transmission mechanism having a pulley and belt, causing the impeller (not shown) to rotate in a direction that draws in air from the axial direction through the suction portion 3d and discharges it in a predetermined centrifugal direction, thereby discharging the air from the discharge port 3c1. The air discharged from the centrifugal blower 3 passes through the air supply pipe 4 and branches from the main pipe 4a into multiple pairs of branch pipes 4b. The air passing through each pair of branch pipes 4b is ejected under increased air pressure from slit-shaped outlet holes 4b1a at the tip 4b1 of the branch pipe 4b, which are formed by narrowing the pipe in the vertical direction and opening to the front and sides. The air is then ejected in a carpet-like manner toward a predetermined range that covers a portion of the divided areas divided in the width direction of the area where the cutting blade 22 is provided, depending on the number of branch pipes. At this time, the carpet-like air ejected from the slit-shaped outlet holes 4b1a at the tip 4b1 of the pair of branch pipes 4b in each set intersects at the tip of the cutting blade 22. At this time, the inclination and height of the tip 4b1 of the branch pipe 4b connected to the main pipe 4a relative to the cutting blade 22 can be freely changed via the main pipe 4a, which is supported via a pair of air supply pipe support members 111 on a pair of reel support arms 23a for attaching the pick-up reel, which are equipped with position adjustment means (not shown) that can adjust the position up, down, front, and back using a conventionally known hydraulic cylinder or the like, from a height position near the cutting blade 22 (a height position in a predetermined range of 0 to several cm above the cutting blade 22) to a height position in a predetermined range of 100 cm above the cutting blade 22, and air can be sprayed in a carpet-like manner from the spray holes 4b1a.

[0087] We will explain how to use a combine harvester equipped with the agricultural grain harvesting assist mechanism 1 in this state to harvest beans such as soybeans and adzuki beans that have fallen over, as well as beans such as soybeans and adzuki beans that have not fallen over but are bearing fruit at a height close to the ground. In addition, since soybeans, adzuki beans, and other beans tend to pop out of the pods due to impact, it is desirable to remove the raking reel when harvesting. Here, we will explain the case of harvesting with the raking reel removed. In this example, adzuki beans sown and cultivated in a ridge width of 67 cm are harvested, and the spacing between each pair of branch pipes 4b connected to the main pipe 4a is adjusted to 67 cm, and the tip ends 4b1 of the pair of branch pipes 4b are oriented approximately horizontally toward the adzuki beans in one ridge.

[0088] The reaping unit is moved toward the beans, such as soybeans and adzuki beans. As the cutting blades 22 approach the beans, the beans are guided to a predetermined reaping position by the cutting blades 22 while the areas near the base of the beans are pressed obliquely against the rearward and downward bent portions of each pair of branch pipes 4b of each set, toward the cutting blade 22. At this time, the pair of branch pipes 4b hardly collide with the beans and pods of the adzuki beans in each ridge, and the force of collision with the beans and pods is weakened by passing by both sides of the beans or by the oblique pressure from the bent portions of the branch pipes 4b toward the cutting blade 22. As a result, beans hardly pop out of the pods of the adzuki beans grown in each ridge. When the cutting blade 22 approaches the position where the azuki beans are to be cut, the pair of branch pipes 4b, whose positions and orientations are adjusted to correspond to the respective ridges, reach a position where they spray air in a carpet-like manner in an approximately horizontal direction toward the azuki beans on the cutting blade side from the slit-shaped outlet holes 4b1a opening forward and to the side of the tip 4b1. Furthermore, as the reaping unit continues to travel, the reaping blade 22 cuts the pods of the beans and the stems containing the pods.

[0089] Meanwhile, unlike barley, wheat, and other legumes, soybeans, adzuki beans, and other legumes have the following characteristics: they tend to bear fruit close to the ground, each fruit is large and heavy, and they need to be dried before harvesting. Therefore, when harvesting beans such as soybeans and adzuki beans using a conventional large combine harvester that does not have the agricultural grain harvesting auxiliary mechanism 1 of the first embodiment, the weight of the beans and pods when they are harvested by the cutting blade, and the impact when they come into contact with the cutting blade or the tines of the raking reel, can cause the beans to easily pop out of the pods and fall. Furthermore, weeds are likely to grow in fields where beans such as soybeans and adzuki beans are cultivated. If a conventional large combine harvester is used to harvest beans such as soybeans and adzuki beans in a field where weeds have grown, the weeds will block the path of the beans and pods cut by the blade toward the lateral feed auger 24 at the rear of the platform, causing them to fall below the platform, potentially resulting in even greater losses in the harvest yield.

[0090] However, when a large combine harvester is used in which the spacing between the multiple branch pipes 4b connected to the main pipe 4a and the horizontal orientation of the tip 4b1 of each branch pipe 4b are adjusted via the agricultural grain harvesting auxiliary mechanism 1 of the large combine harvester of the first embodiment, the inclination and height position can be freely changed from the slit-shaped outlets 4b1a of the tip 4b1 of the pair of branch pipes 4b for each ridge within a specified range from a height position near the cutting blade 22 (a height position in a specified range of 0 to several cm above the cutting blade 22) to 100 cm above the cutting blade 22, and the beans and pods that are about to fall due to the strong wind pressure of the air that is sprayed out in a carpet-like pattern are sent, along with the cut weeds, to the horizontal feed auger 24 at the rear of the platform. The harvested beans, such as soybeans and adzuki beans, are fed laterally by a pair of rotating horizontal feed augers 24 to the area where the conveying section 30 is provided, similar to the large combine harvesters shown in Figures 26 to 29. The fed beans are transported to the threshing section 40 by the conveyor 31 of the conveying section 30. The threshed grains are sorted by the sorting section 50. The straw and weeds discharged by the threshing section 40 are shredded by the straw waste processing section 60 and discharged to the outside.

[0091] In this way, when azuki beans are harvested using a large combine harvester in which the spacing between the multiple branch pipes 4b connected to the main pipe 4a and the horizontal orientation of the tip 4b1 of each branch pipe 4b are adjusted via the agricultural grain harvesting auxiliary mechanism 1 of the large combine harvester of the first embodiment, the beans that are ejected from the pods by the impact when the azuki beans are cut by the cutting blades and the beans and pods that tend to fall under their own weight are sprayed out in a carpet-like manner from the slit-shaped outlet holes 4b1a in the tip 4b1 of the pair of branch pipes 4b for each ridge, and due to the strong wind pressure of the air that intersects at the tip position of the cutting blades 22, they are easily sent to the cross-feed auger 24 at the rear of the platform without falling below. Furthermore, when adzuki beans are harvested while weeds are still growing in the field, even if the beans and pods cut by the cutting blade 22 are blocked by the cut weeds from moving from the position of the cutting blade 22 toward the cross-feed auger 24 at the rear of the platform, the cut beans and pods are sprayed out in a carpet-like manner from the slit-shaped outlet holes 4b1a at the tips 4b1 of the pair of branch pipes 4b for each ridge, and the strong wind pressure of the air that intersects at the tip position of the cutting blade 22 makes it easy for them to be sent to the cross-feed auger 24 at the rear of the platform without falling below. In addition, by using a large combine harvester, it is possible to harvest azuki beans grown in many rows at once, significantly reducing the working time. This, combined with a significant improvement in the loss of harvest volume due to beans and pods falling off when harvesting the adzuki beans, results in extremely high harvesting efficiency.

[0092] Second embodiment (branch pipe tilt / position adjustment structure) Fig. 14 is an explanatory diagram showing the main parts of a branch pipe tilt / position adjustment structure provided in a crop grain reaping auxiliary mechanism of a large combine harvester according to a second embodiment of the present invention, where (a) is a schematic diagram showing the positional relationship between a pair of reel support arms and a ventilation pipe support member that supports the ventilation pipe, viewed from the front side of the platform, and (b) is a schematic diagram seen from the side. Fig. 15 is a partial explanatory diagram showing the positional relationship between a pair of reel support arms and a ventilation pipe support member that supports the ventilation pipe, viewed obliquely from the front, in the branch pipe tilt / position adjustment structure provided in a crop grain reaping auxiliary mechanism of a large combine harvester according to the second embodiment. In the agricultural grain harvesting assist mechanism 1 of a large combine harvester of the second embodiment, as shown in, for example, Figures 14 and 15, a pair of air supply pipe support members 112 supporting a portion 4a1 of the main pipe 4a of the air supply pipe 4 that is disposed in front of and above the cutting blade 22 and generally parallel to the cutting blade are attached to a different member on the platform 21 from a pair of reel support arms 23a for attaching the take-up reel shown in, for example, Figures 28 and 29. Furthermore, the take-up reel 23 shown in Figures 28 and 29 is provided with a take-up reel position adjustment means (not shown) on each of the pair of reel support arms 23a that can adjust the position up, down, front, and back using a conventionally known hydraulic cylinder or the like. Furthermore, the air supply pipe 4 is provided with an air supply pipe position adjustment means (not shown) on each of the pair of air supply pipe support members 112 that can adjust the position up, down, front, and back using a conventionally known hydraulic cylinder or the like.

[0093] The branch pipe tilt / position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism 1 of the large combine harvester of the second embodiment is configured so that the following can be performed independently of one another: adjustment of the tilt and height position of the tip 4b1 of the branch pipe 4b relative to the cutting blade 22 by the ventilation pipe position adjustment means in the branch pipe tilt / position adjustment structure; adjustment of the spacing between each branch pipe 4b connected to the main pipe 4a and the approximately horizontal orientation of the tip 4b1 of the branch pipe 4b by the branch pipe direction / spacing adjustment structure; and adjustment of the position of the take-up reel by the take-up reel position adjustment means. The other configurations are substantially the same as those of the agricultural grain reaping assist mechanism 1 of the large combine harvester of the first embodiment.

[0094] Third embodiment (branch pipe tilt / position adjustment structure) Fig. 16 is an explanatory diagram showing the main parts of the branch pipe tilt / position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism of a large combine harvester according to a third embodiment of the present invention, and is a partial explanatory diagram showing the configuration of the ventilation pipe support member that supports the ventilation pipe from an oblique front view. Fig. 17 is a partially enlarged explanatory diagram showing the configuration of the ventilation pipe support member that supports the ventilation pipe in the branch pipe tilt / position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism of a large combine harvester according to the third embodiment, from a side view. The branch pipe tilt / position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism 1 of the large combine harvester of the third embodiment is configured so that the distance between the tip 4b1 of the branch pipe 4b and the cutting blade 22 can be freely adjusted, for example, as shown in Figures 16 and 17. In detail, a pair of ventilation pipe support members 112 supporting a portion 4a1 of the main pipe 4a in the ventilation pipe 4 of the agricultural grain harvesting auxiliary mechanism 1 of a large combine, which is arranged in front of and above the cutting blade 22 and approximately parallel to the cutting blade, are composed of a first square pipe member 112a and a second square pipe member 112b. One end (not shown) of the first square pipe member 112a is connected to a ventilation piping position adjustment means (not shown) whose position can be adjusted up and down and back and forth by a conventionally known hydraulic cylinder or the like. The first square pipe member 112a also has a plurality of bolt holes 112d formed at predetermined intervals on the side surface on the other end side. One end of the second square pipe member 112b supports a portion 4a1 of the main pipe 4a of the air supply pipe 4, which is disposed in front of and above the cutting blade 22 and substantially parallel to the cutting blade. The second square pipe member 112b has a size that allows it to be inserted into the first square pipe member 112a, and has a plurality of bolt holes 112c formed at predetermined intervals on its side surface. The pair of ventilation pipe support members 112 has the second square pipe member 112b inserted movably inside the first square pipe member 112a, and by moving it inside the first square pipe member 112a via an operator, the bolt through-hole 112c of the second square pipe member 112b is aligned with a predetermined bolt through-hole 112d of the first square pipe member 112a and fixed with a bolt 112e, thereby allowing the distance between the tip 4b1 of the branch pipe 4b and the cutting blade 22 to be freely adjusted. The other configurations are substantially the same as those of the agricultural grain reaping assist mechanism 1 of the large combine harvester of the second embodiment.

[0095] Fourth embodiment (branch pipe tilt / position adjustment structure) FIG. 18 is an explanatory diagram showing the main parts of the branch pipe tilt / position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism of a large combine harvester according to the fourth embodiment of the present invention, where (a) is a partially enlarged view and (b) is a cross-sectional view showing the internal configuration. The branch pipe tilt / position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism 1 of the large combine harvester of the fourth embodiment has, for example, an automatic branch pipe tip / blade distance adjustment means for automatically adjusting the distance between the tip 4b1 of the branch pipe 4b and the cutting blade 22, as shown in Figure 18. In detail, the automatic distance adjustment means between the tip of the branch pipe and the cutting blade is composed of a pair of air supply pipe support members 112' that support the portion 4a1 of the main pipe 4a in the air supply pipe 4 in the agricultural grain harvesting auxiliary mechanism 1 of the large combine, which is arranged in front of and above the cutting blade 22 and approximately parallel to the cutting blade, and an actuator 113. The pair of air-blowing pipe support members 112' are configured to include a first square pipe member 112a' and a second square pipe member 112b'. The first square pipe member 112a' has one end (not shown) connected to a position adjustment means for the air supply piping (not shown) whose position can be adjusted up and down and forward and backward using a conventionally known hydraulic cylinder or the like, and is equipped with an actuator 113 inside. The second square pipe member 112b' has one end supporting a portion 4a1 of the main pipe 4a of the air supply pipe 4 that is positioned in front of and above the cutting blade 22 and approximately parallel to the cutting blade, and the other end connected to the tip of the actuator 113. The second square pipe member 112b' has a size that allows it to be inserted into the first square pipe member 112a'. The pair of ventilation pipe support members 112' are configured so that the second square pipe member 112b' is movably inserted inside the first square pipe member 112a', and as it moves inside the first square pipe member 112a' by operating the actuator 113, the distance between the tip 4b1 of the branch pipe 4b and the cutting blade 22 is automatically adjusted. The other configurations are substantially the same as those of the agricultural grain reaping auxiliary mechanism 1 of the large combine harvester of the third embodiment.

[0096] Fifth embodiment (branch pipe direction / spacing adjustment structure) Fig. 19 is an explanatory diagram showing a branch pipe direction / spacing adjustment structure provided in an agricultural grain reaping auxiliary mechanism of a large combine harvester according to a fifth embodiment of the present invention. Fig. 20 is an explanatory diagram showing the main parts of the branch pipe direction / spacing adjustment structure provided in an agricultural grain reaping auxiliary mechanism of a large combine harvester according to the fifth embodiment, in which (a) is a partial plan view from below of a state in which a branch pipe mounting tubular member to which a flange-shaped member is fixed is attached to a base plate, (b) is a partial plan view from below of (a) with a first connecting member attached, (c) is a partial plan view from below of (a) with a second connecting member attached, (d) is a partial plan view from below of the branch pipe direction / spacing adjustment structure, and (e) is a partial front view of the branch pipe direction / spacing adjustment structure. The branch pipe tilt and position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism 1 of the large combine harvester of the fifth embodiment is configured so that the approximately horizontal orientation of the tip ends of all pairs of branch pipes can be adjusted simultaneously. In detail, the branch pipe tilt / position adjustment structure is configured to have, for example, a base plate 121, a flange-shaped member 122, a first connecting member 123, a second connecting member 124, a connecting shaft 125, and a tubular member 126 for attaching the branch pipe, as shown in Figure 19. The base plate 121 is formed with a hole (not shown) into which a branch pipe mounting tubular member 126 can be loosely fitted. The flange-shaped member 122 is fixed to the outer peripheral surface of the branch pipe mounting tubular member 126 near the base plate 121 side. The flange-shaped member 122 has a portion formed in, for example, a trapezoidal shape. The branch pipe mounting tubular member 126 is configured so that the end opposite to the base plate 121 can be connected to the branch pipe 4b. The branch pipe mounting tubular members 126 to which the flange-shaped members 122 are fixed are loosely fitted into holes in the base plate 121 so that the trapezoidal portions of each flange-shaped member 122 fixed to the branch pipe mounting tubular members 126 corresponding to adjacent branch pipes 4b in adjacent pairs face opposite each other with respect to the longitudinal sides of the base plate 121, as shown in Figure 20(a). The connecting shaft 125 is provided at a trapezoidal portion of each of the flange-shaped members 122 fixed to the branch pipe mounting tubular members 126 corresponding to the adjacent branch pipes 4b in adjacent pairs.

[0097] 20(b), the first connecting member 123 connects the branch-pipe-attaching tubular members 126 fixed to each other corresponding to adjacent branch pipes 4b in adjacent pairs via the connecting shafts 125 provided at trapezoidally formed portions of each of the flange-shaped members 122 fixed to each other corresponding to adjacent branch pipes 4b in adjacent pairs. As a result, when a force is applied to move the first connecting member 123 in the longitudinal direction, the connected branch-pipe-attaching tubular members 126 rotate in different directions from each other. 20(c), the second connecting member 124 connects the branch-pipe-attaching tubular members 126 fixed to each other corresponding to the branch pipes 4b on the same side of the pair of branch pipes 4b in each set via connecting shafts 125 provided at trapezoidal portions of the respective flange members 122 fixed to each other corresponding to the branch pipes 4b on the same side of the pair of branch pipes 4b in each set. This allows the connected branch-pipe-attaching tubular members 126 to rotate in the same direction when a force to move the second connecting member 124 in the longitudinal direction is applied. The branch pipe tilt / position adjustment structure is constructed by attaching a branch pipe mounting tubular member 126 to which a flange-shaped member 122 is fixed to a base plate 121, then attaching a first connecting member 123, and then attaching a second connecting member 124 (Figure 20(d)). 20(e), all branch pipes 4b are attached and fixed in the same orientation to the respective branch pipe attaching tubular members 126. In this case, the branch pipes 4b are attached to the branch pipe attaching tubular members 126 other than the branch pipe attaching tubular members 126 located at both ends, among the branch pipe attaching tubular members 126 provided in the branch pipe tilt / position adjustment structure. In this way, the tilt / position adjustment structure for the branch pipe to which the branch pipe 4b is attached is configured so that the approximately horizontal orientation of the tip ends 4b1 of all pairs of branch pipes 4b can be adjusted simultaneously by applying a force that moves the second connecting member 124 in the longitudinal direction. The other configurations are substantially the same as those of the agricultural grain reaping assist mechanism 1 of the large combine harvester of the first embodiment.

[0098] 19 and 20, an actuator or the like that applies a force to move the second connecting member 124 in the longitudinal direction is preferably connected to one end of the second connecting member 124. In this way, the approximately horizontal orientations of the tip ends 4b1 of all pairs of branch pipes 4b can be automatically adjusted simultaneously. Furthermore, the branch pipe tilt / position adjustment structure provided in the agricultural grain harvesting auxiliary mechanism 1 of the large combine harvester of the fifth embodiment may be configured so as to enable simultaneous adjustment of the approximately horizontal orientation of the tip ends 4b1 of at least one pair of branch pipes 4b, rather than all pairs.

[0099] Sixth embodiment (configuration added to a large combine equipped with the agricultural grain harvesting assist mechanism of the first to fifth embodiments - Part 1) Fig. 21 is an explanatory view showing the configuration of the main parts of a large combine harvester according to a sixth embodiment of the present invention, and Fig. 22 is an explanatory view showing the configuration of the main parts of the sixth embodiment from the side. The large combine of the sixth embodiment is equipped with the agricultural grain harvesting assist mechanism of any of the large combines of the first to fifth embodiments described using Figures 1 to 20, and further, as shown in Figures 21 and 22, for example, the surface of the front lower edge of the platform 21 that is equipped with the cutting blade 22 in the cutting section 20 is formed into a flattened surface from the cutting blade 22 toward the cross-feed auger 24. More specifically, the step between the surface A1 of the platform 21 immediately behind the cutting blade 22 and the surface A2 of the platform 21 behind the cutting blade 22 is made flat by the step-eliminating member 130. Preferably, the bolts used to attach the cutting blade 22 have their tips protruding downward and their screw heads formed into a curved shape. This makes it difficult for beans to come into contact with the rear of the cutting blade 22, making it easier to feed the beans in the direction of the lateral feed auger 24.

[0100] Seventh embodiment (configuration added to a large combine equipped with the agricultural grain harvesting assist mechanism of the first to fifth embodiments - Part 2) Figure 23 is an explanatory diagram showing the configuration of the feed pan in an existing large combine harvester from an obliquely upward view. Figure 24 is an explanatory diagram showing the configuration of the feed pan of a large combine harvester according to a seventh embodiment of the present invention in comparison with an existing large combine harvester, where (a) is an explanatory diagram showing the configuration of the feed pan in an existing large combine harvester from a side view, and (b) is an explanatory diagram showing the configuration of the feed pan of the large combine harvester of the seventh embodiment from a side view. The large combine harvester has a conveying section 30 equipped with a conveyor that transports the agricultural grain harvested by the harvesting section 20, a threshing section 40 equipped with a thresher (not shown) that threshes the transported agricultural grain, a sorting section 50 located below the threshing section that shakes the agricultural grain transported by the conveying section 30 and threshed in the threshing section 40 to separate it into grains and other debris, and a feed pan located between the conveying section 30 and sorting section 50 that receives the threshed agricultural grain and removes chaff and debris using air blown in by a cleaning fan (not shown). For example, the feed pan 140 of an existing large combine harvester shown in Figure 23 is provided in the threshing section 40, and receives the threshed grain transported by the conveying section 30 and threshed by the threshing drum (not shown) of the threshing section 40.It then swings back and forth while being blown with air from a cleaning fan (air blowing device) (not shown) to remove husks and debris, and sends the threshed grain to the sorting section 50. However, as shown in Figure 24(a), the feed pan 140 in existing large combine harvesters has an upward slope from the conveying section 30 to the sorting section 50, and when azuki beans are threshed, grains and debris tend to accumulate near the end P of the feed pan 140 on the conveying section side, and if excessive accumulation occurs, problems such as malfunctions can easily occur in the rocking means (not shown) that rocks the feed pan 140 and the conveying section 30.

[0101] However, the large combine of the seventh embodiment is equipped with the agricultural grain harvesting assist mechanism 1 of the large combine of any of the first to fifth embodiments described using Figures 1 to 20, and further, as shown in Figure 24(b), the feed pan 140 is configured to have a pile prevention plate 141 having a surface that slopes gently downward from the end on the conveying section side to a predetermined position toward the sorting section side.

[0102] Eighth embodiment (Configuration added to a large combine equipped with the agricultural grain harvesting assist mechanism of the first to fifth embodiments - Part 3) FIG. 25 is an explanatory diagram showing an example of the configuration of the main parts of a large combine harvester according to the eighth embodiment of the present invention. The large combine of the eighth embodiment is equipped with a conveying section 30 equipped with a conveyor for transporting agricultural grain harvested by the harvesting section 20, a threshing section 40 equipped with a thresher (not shown) for threshing the transported agricultural grain, a sorting section 50 arranged below the threshing section which shakes the agricultural grain transported by the conveying section 30 and threshed by the threshing section 40 to separate it into grains and other waste, and a straw waste processing section 60 which shreds the straw discharged by the threshing section 40. In addition to being equipped with the agricultural grain harvesting assistance mechanism of a large combine of any of the first to fifth embodiments described using Figures 1 to 20, the large combine can further be equipped with, for example, as shown in Figure 25, a cover covering the sides and rear of the large combine can be removed, exposing the drive mechanism and piping, and each of the conveying section 30, threshing section 40, sorting section 50 and straw waste processing section 60 is equipped with a window of a predetermined size and shape that allows the internal processing status to be observed from the outside and that allows work to be performed from the outside to resolve blockages, malfunctions and other internal problems. Figure 25 shows an example of a window, in which a window W is formed in the outer wall of the straw waste treatment unit 60, exposed when the cover covering the rear of the large combine is removed. This window W makes it possible to observe the processing status of the straw waste treatment chain inside the straw waste treatment unit 60, and also makes it possible to perform work from the outside to resolve blockages, breakdowns, and other internal problems. Although not shown for convenience, the windows formed in the conveying section 30 are formed on the outer wall of the conveying section 30 exposed when the cover covering the side of the large combine is removed, making it possible to observe the processing status of the conveyor 31 and perform work from outside to resolve clogging, malfunctions, and other internal malfunctions. Similarly, the windows formed in the threshing section 40 and the sorting section 50 are formed on the outer wall of the threshing section 40 and the sorting section 50 exposed when the cover covering the side of the large combine is removed, making it possible to observe the processing status of the threshing section 40 and the sorting section 50, including the threshing machine (not shown), feed pan, cleaning fan (air delivery device) (not shown), and rocking means (not shown) inside the threshing section 40 and the sorting section 50, and making it possible to perform work from outside to resolve clogging, malfunctions, and other internal malfunctions. It is more preferable that the window W is provided with a transparent cover plate that can be opened and closed. Furthermore, an antistatic film is coated on the surface of each component present inside the conveying section 30, threshing section 40, sorting section 50, and straw removal processing section 60. Note that an anti-adhesion film may be coated instead of the anti-static film.

[0103] Effects of the agricultural grain reaping auxiliary mechanism 1 of the large combine harvester according to the first to eighth embodiments and the large combine harvester equipped with the same The agricultural grain harvesting auxiliary mechanism 1 for a large combine harvester of the first embodiment and a large combine harvester equipped with the same are provided with an air blowing pipe 4 which is connected to the outlet of the centrifugal type air blowing device 3, has a main pipe 4a which is connected to the outlet of the centrifugal type air blowing device 3, and has a portion which is arranged substantially parallel to the cutting blade 22 in front of and above the cutting blade 22, and a plurality of pairs of branch pipes 4b which are connected at predetermined intervals to the portion of the main pipe 4a which is arranged substantially parallel to the cutting blade 22, and in adjacent pairs, adjacent branch pipes 4b are arranged close to each other, each branch pipe 4b is bent towards the cutting blade which is located rearward and below, and a tip end 4b1 of each branch pipe 4b is formed so that the pipe is narrowed in the vertical direction so that air is sprayed in a carpet-like manner towards a predetermined range which covers some of the divided areas which are divided in the width direction of the area where the cutting blade 22 is provided according to the number of branch pipes 4b, and The pair of branch pipes 4b in each set have slit-shaped outlets 4b1a, and the pair of branch pipes 4b in each set are arranged so that the tips of the pair of branch pipes 4b approach each other so that the air sprayed in a carpet-like manner from the slit-shaped outlets 4b1a in each tip 4b1 intersects at the tip of the cutting blade 22.Therefore, when beans such as soybeans and adzuki beans are cut by the cutting blade 22, beans that are ejected from the pods by the impact and beans and pods that tend to fall under their own weight are sprayed in a carpet-like manner from the slit-shaped outlets 4b1a in the tip 4b1 of the pair of branch pipes 4b in each set toward a predetermined range that covers some of the divided areas that are divided in the width direction of the area where the cutting blade 22 is provided according to the number of branch pipes, and the strong wind pressure of the air that intersects at the tip of the cutting blade 22 makes it easy for the beans to be sent to the cross-feed auger 24 at the rear of the platform 21 without falling below the platform 21. Furthermore, if the pair of branch pipes 4b in each set are configured so that the tip ends 4b1 face in the direction in which they approach each other so that the air sprayed in a carpet-like manner from the slit-shaped outlet holes 4b1a of each tip end 4b1 intersects at the tip position of the cutting blade 22, as the cutting blade 22 approaches the beans during cutting, the part of the pair of branch pipes 4b in each set that bends toward the cutting blade 22 located at the rear and below will press diagonally against the area near the base of the beans, guiding them to a predetermined cutting position on the cutting blade 22 where the air sprayed in a carpet-like manner intersects.At this time, the pair of branch pipes 4b hardly collide with the beans and pods of the adzuki beans in each ridge, and the force of collision with the beans and pods is weakened by passing through both sides of the beans or by oblique pressure from the part of the branch pipe 4b that is bent toward the cutting blade 22, so that beans hardly pop out of the pods of the adzuki beans cultivated in each ridge.

[0104] Furthermore, the agricultural grain reaping auxiliary mechanism 1 for a large combine harvester of the first embodiment and the large combine harvester equipped with it are configured to have an inclination / position adjustment structure for the branch pipe 4b for freely adjusting the inclination and height position of the tip 4b1 of the branch pipe 4b relative to the cutting blade 22 within a predetermined range from a height position near the cutting blade 22 to 100 cm above the cutting blade 22. Therefore, when harvesting beans such as soybeans and adzuki beans in a field with weeds still growing, the beans and pods cut by the cutting blade will not be pushed away from the position of the cutting blade to the platform by the cut weeds. Even if their path toward the cross-feed auger at the rear of the platform is obstructed, the harvested beans and pods are sprayed out in a carpet-like manner from the slit-shaped outlets 4b1a at the tips 4b1 of the pair of 4b, with the inclination and height position freely changing within a predetermined range from a height position near the cutting blade 22 (a height position in a predetermined range of 0 to several cm above the cutting blade 22) to 100 cm above the cutting blade 22, and due to the strong wind pressure of the air that intersects at the tip position of the cutting blade 22, they are easily sent to the cross-feed auger at the rear of the platform without falling below 21. Therefore, without equipping the raking reel 23, it is possible to harvest beans such as soybeans and adzuki beans in a state where weeds remain in the field, while significantly improving the loss of harvest volume due to falling beans and pods compared to a configuration equipped with the raking reel 23.

[0105] Furthermore, the agricultural grain harvesting assist mechanism 1 for a large combine of the first embodiment and a large combine equipped with the same are configured with a branch pipe direction / spacing adjustment structure for adjusting the spacing between each branch pipe 4b connected to the main pipe 4a and the approximately horizontal orientation of the tip 4b1 of the branch pipe 4b, so that regardless of the variety of row widths used for sowing, it is possible to prevent the branch pipes 4b from colliding with the beans and pods just before harvesting. Furthermore, by attaching the branch pipes 4b and adjusting the direction of the tip 4b1 so that air from the pair of branch pipes 4b is sprayed onto beans such as adzuki beans sown and cultivated in one furrow, regardless of the variety of furrow widths sown, it is possible to reduce the falling of beans and pods when harvesting beans, such as beans popping out of the pods due to their own weight or the impact of contact with the cutting blade 22 or the tines 23f of the raking reel 23, and to send air so that the harvested beans such as adzuki beans are more reliably sent to the lateral feed auger 24 at the rear of the platform 21, thereby significantly reducing harvest loss. Furthermore, a large combine harvester can harvest a large amount of beans such as adzuki beans at once, significantly shortening working time and significantly improving harvesting efficiency.

[0106] Furthermore, in the agricultural grain reaping auxiliary mechanism 1 for a large combine harvester of the second embodiment and a large combine harvester equipped with the same, the reel support arm 23a and the ventilation pipe support member 111 that supports the ventilation pipe 4 are attached to different members on the platform 21, and the tilt and height position of the tip 4b1 of the branch pipe 4b relative to the cutting blade 22 can be adjusted by the branch pipe tilt and position adjustment structure, and the spacing between the branch pipes 4b connected to the main pipe 4a and the approximately horizontal orientation of the tip 4b1 of the branch pipe 4b can be adjusted by the branch pipe direction and spacing adjustment structure. The configuration allows the adjustment of the position of the raking reel 23 by the raking reel position adjustment means to be performed independently of each other, so in addition to the effects of the agricultural grain harvesting assist mechanism 1 for a large combine harvester of the first embodiment and the large combine harvester equipped with it, even when the position of the raking reel 23 is adjusted by the raking reel position adjustment means, the inclination or height position of the tip 4b1 of the branch pipe 4b relative to the cutting blade 22 does not change, so the raking reel 23 and branch pipe 4b can be adjusted to optimal positions when harvesting the agricultural grain to be harvested, such as beans such as soybeans and adzuki beans, or wheat.

[0107] Furthermore, according to the agricultural grain harvesting assist mechanism 1 for a large combine of the third embodiment and a large combine equipped with it, the branch pipe tilt / position adjustment structure is further configured so that the distance between the tip 4b1 of the branch pipe 4b and the cutting blade 22 can be freely adjusted, so in addition to the effects of the agricultural grain harvesting assist mechanism 1 for a large combine of the second embodiment and a large combine equipped with it, the distance between the tip 4b1 of the branch pipe 4b and the cutting blade 22 can be adjusted to an optimum distance during each harvest depending on the row width of the agricultural grain to be harvested, such as beans such as soybeans and adzuki beans, or wheat, and the distance between the branch pipes 4b and the approximately horizontal orientation of the tip 4b1 of the branch pipe 4b can be adjusted to an optimum distance and orientation.

[0108] Furthermore, according to the agricultural grain harvesting assist mechanism 1 for a large combine of the fourth embodiment and a large combine equipped with the same, the tilt and position adjustment structure of the branch pipe is configured to have an automatic branch pipe tip / blade spacing adjustment means that automatically adjusts the spacing between the tip 4b1 of the branch pipe 4b and the cutting blade 22, so in addition to the effects of the agricultural grain harvesting assist mechanism 1 for a large combine of the third embodiment and a large combine equipped with it, the workload for adjusting the spacing between the branch pipe tip / blade can be greatly reduced.

[0109] Furthermore, the agricultural grain harvesting assist mechanism 1 for a large combine of the fifth embodiment and a large combine equipped with the same are configured so that the approximately horizontal orientation of the tip ends 4b1 of all pairs of branch pipes 4b can be adjusted simultaneously, so in addition to the effects of the agricultural grain harvesting assist mechanism 1 for a large combine of the first embodiment and a large combine equipped with the same, the workload for adjusting the approximately horizontal orientation of the tip ends 4b1 of the branch pipes 4b can be significantly reduced.

[0110] Furthermore, according to the large combine harvester of the sixth embodiment, the surface of the front lower edge of the platform 21 equipped with the cutting blade 22 in the cutting section 20 is formed into a flat surface from the cutting blade 22 toward the cross-feed auger 24. Therefore, in addition to the effects of the large combine harvester equipped with the agricultural grain cutting assistance mechanism 1 of the first to fifth embodiments, when harvesting beans, when the pods and stem portions including the pods are cut with the cutting blade, the cut pods can be avoided from colliding with steps and can be easily sent to the cross-feed auger 24, thereby further reducing harvest losses.

[0111] In addition, the large combine harvester of the seventh embodiment has a conveying section 30 equipped with a conveyor 31 that transports the agricultural grain harvested by the harvesting section 20, a threshing section 40 equipped with a thresher that threshes the transported agricultural grain, a sorting section 50 arranged below the threshing section that shakes the agricultural grain transported by the conveying section 30 and threshed in the threshing section 40 to separate it into grains and other debris, and a feed pan 140 arranged between the conveying section 30 and the sorting section 50 that receives the threshed agricultural grain and removes husks and debris with air from a cleaning fan, and the feed pan 140 is configured so that it has a surface that slopes gently downward from the end of the conveying section to a predetermined position toward the sorting section.As a result, in addition to the effects of the large combine harvesters equipped with the agricultural grain harvesting assist mechanism 1 of the first to fifth embodiments, even when threshing adzuki beans, grains and debris are less likely to accumulate at the end of the feed pan on the conveying section side, thereby preventing malfunctions.

[0112] Furthermore, the large combine harvester of the eighth embodiment is provided with a conveying section 30 equipped with a conveyor 31 that conveys the agricultural grain harvested by the reaping section 20, a threshing section 40 equipped with a thresher that threshes the conveyed agricultural grain, a sorting section 50 that is arranged below the threshing section and shakes the agricultural grain that has been conveyed by the conveying section 30 and threshed by the threshing section 40 to separate it into grains and other waste, and a straw waste processing section 60 that shreds the straw discharged by the threshing section 40. The covers that cover the sides and rear of the combine harvester are removed, exposing the drive mechanism and piping, and the conveying section 30, threshing section 40, sorting section 50, and straw waste processing section 60 each have internal The configuration is such that the processing status of the unit can be observed from the outside, and that a window of a specified size and shape can be provided that allows work to be done from the outside to resolve blockages, malfunctions, and other internal malfunctions.As a result, in addition to the effects of large combines equipped with the agricultural grain harvesting assistance mechanism 1 of the first to fifth embodiments, internal malfunctions can be discovered from the outside, and malfunctions such as blockages can be dealt with from the outside without the need to remove large components, preventing harvest loss and a deterioration in harvest efficiency, and significantly reducing the workload and time required to resolve blockages, malfunctions, and other internal malfunctions.

[0113] Furthermore, according to the large combine harvester of the eighth embodiment, the surfaces of each component inside the conveying section 30, threshing section 40, sorting section 50, and straw waste processing section 60 are coated with an antistatic film, making it difficult for grains, straw waste, and other dust particles to become statically charged. As a result, they are less likely to adhere to the surfaces of each component, preventing problems caused by the accumulation of such particles. Furthermore, even if grains, straw waste, and other dust particles adhere to the surfaces of each component, the particles can be easily removed by blowing air from the above-mentioned window using the air blowing device, without the need for the complicated removal of components. Furthermore, if the surfaces of each component inside the conveying section 30, threshing section 40, sorting section 50, and straw waste processing section 60 are coated with an anti-adhesion film, even if grains, straw waste, or other dust particles adhere to the surface of each component, the particles can be easily removed by washing with water using a water washing device through the window described above, without having to remove any major components. Therefore, with the large combine of the eighth embodiment, when switching from harvesting one type of agricultural grain to harvesting another type of agricultural grain, the workload and time required for cleaning the components inside the conveying section, threshing section, sorting section, and straw disposal section can be significantly reduced.

[0114] Therefore, in the large combine harvester equipped with the agricultural grain harvesting auxiliary mechanism 1 of the first to eighth embodiments, the large combine harvester is equipped with a harvesting section that harvests agricultural grain, the harvesting section having a harvesting blade, a raking reel, and an air ejection device, and the air ejection device has a main pipe and a number of branch pipes that are each connected to the main pipe at predetermined intervals and eject air from their tips toward the harvesting blade side, and regardless of whether the sowing is done with various row widths, the branch pipes do not collide with the beans and pods immediately before harvesting beans such as soybeans and adzuki beans, and the weight of the beans and pods when harvested and the weight of the beans such as soybeans and adzuki beans are taken into consideration. The present invention provides a large combine harvester equipped with an agricultural grain harvesting auxiliary mechanism that reduces the falling of beans and pods due to the beans being ejected due to the impact of contact with the cutting blade or the tines of the raking reel during harvesting, ejects air so that the harvested beans such as adzuki beans can be reliably sent to the lateral feed auger at the rear of the platform, and harvests a large amount of beans such as adzuki beans grown on many ridges at once while significantly reducing loss of harvest yield, significantly improves harvesting work efficiency, significantly shortens harvesting time, and is also capable of successfully harvesting wheat. [Industrial Applicability]

[0115] The agricultural grain harvesting assist mechanism for a large combine of the present invention and a large combine equipped with the same are useful in fields that require the harvesting of agricultural grains such as soybeans, adzuki beans, and other legumes over large cultivated areas. [Explanation of symbols]

[0116] 1. Agricultural Grain Harvesting Subsidy Organization 2 Shaft member 3. Centrifugal blower 3a1, 3a2, 3a3, 3a4 pulleys 3b1, 3b2 belt 3c case 3c1 outlet 3d intake part 4. Ventilation piping 4a Main pipe 4a1: A portion disposed approximately parallel to the cutting blade 22 4a1-1 Slotted hole 4b Branch pipe 4b1 Tip 4b1a vent 4b2 End portion connected to the main pipe 4a 4b2-1 (First) male screw part 4c lid 4c1 Fixed part 5 Air ejection member 5a Spout part 5a1 Spout hole 5a2 End portion opposite to the nozzle hole 5a1 5b Communication part 5b1 Pipe 6 Air ejection member support member 10 Running part 20 Reaping section 21 Platform 22 cutting blade 23 Scraper reel 23a Reel support arm 23b Reel spindle 23c Reel forming arm 23d connecting piece 23e Tine Bar 23f Tyne 24 Horizontal feed auger 24a Cylindrical member 24b Spiral member 24c raking finger 25 Grass Material 30 Conveying section 31 Conveyor 40 Threshing Department 50 Sorting Department 60 Straw disposal unit 91 Branch pipe connection and fixing parts 91a Plate Belt 91a1, 91a2 both ends 91a3 Female thread part 91b U-bolt 100 Branch pipe connection unit 100a Plate-shaped base member 100a1 Hole 100b Annular member 100b1 Cylindrical part 100b2 flange 100b3 First female screw portion 100b4 Rotation amount adjustment part 100b4-1 Guide hole 100c Annular member fixing member 100c1 Second female screw portion 100c2 Second male screw part 100c3 head 101 Branch pipe connection unit fixing member 101a Plate Belt 101a1, 101a2 both ends 101b U-bolt 111 Ventilation pipe support member 112 Ventilation pipe support member 112a First square pipe member 112b Second square pipe member 112c bolt hole 112d Bolt hole 112e Bolt 112' Ventilation pipe support member 112a' First square pipe member 112b' Second square pipe member 113 Actuator 121 Base plate 122 Flange-shaped member 123 First connecting member 124 Second connecting member 125 Connecting shaft 126 Tubular member for attaching branch pipe 130 Step-eliminating member 140 Feed Pan 141 Accumulation prevention plate A1: The surface of the platform 21 immediately behind the cutting blade 22 A2 The surface of the platform 21 immediately behind the cutting blade 22 W window

Claims

1. A reaping assist mechanism is provided for a large combine harvester, the reaping assist mechanism comprising: a traveling section; a reaping section that reaps agricultural grain while being moved by the traveling section; a pair of reel support arms for attaching a raking reel; and a raking reel position adjustment means, the reaping section having a cutting blade for reaping agricultural grain and provided at the front lower edge of a platform, the reaping assist mechanism assisting the reaping section in reaping agricultural grain, A shaft member connected to a predetermined rotary drive shaft provided on the large combine; a centrifugal blower driven by rotation of the shaft member; a main pipe connected to the outlet of the centrifugal blower and having a portion disposed substantially parallel to the cutting blade in front of and above the cutting blade, and a plurality of pairs of branch pipes connected at predetermined intervals to the portions of the main pipe disposed substantially parallel to the cutting blade, and the branch pipes adjacent to each other in adjacent pairs are disposed close to each other; Equipped with Each of the branch pipes bends toward the cutting blade located rearward and downward, The tip end of each of the branch pipes is narrowed in the vertical direction of the pipe so that air is sprayed in a carpet-like manner toward a predetermined range that covers a portion of a divided area divided in the width direction of the area where the cutting blade is provided according to the number of the branch pipes, and has slit-shaped ejection holes that open forward and sideways, The pair of branch pipes in each set are arranged so that the tips of the pair of branch pipes approach each other so that the air jets ejected in a carpet shape from the slit-shaped ejection holes at the tip of each pair intersect at the tip of the cutting blade; and a branch pipe tilt / position adjustment structure for freely adjusting the tilt and height position of the tip of the branch pipe relative to the cutting blade within a predetermined range from a height position near the cutting blade to 100 cm above the cutting blade; a branch pipe direction / spacing adjustment structure for adjusting the spacing between the branch pipes connected to the main pipe and the substantially horizontal orientation of the tip ends of the branch pipes; A large combine harvester is provided with an auxiliary mechanism for harvesting agricultural grain.

2. the reel support arm and the air blowing pipe support member that supports the air blowing pipe are attached to different members on a platform; 2. The agricultural grain harvesting auxiliary mechanism for a large combine harvester according to claim 1, characterized in that the branch pipe tilt / position adjustment structure is configured to adjust the tilt and height position of the tip of the branch pipe relative to the cutting blade, the branch pipe orientation / spacing adjustment structure is configured to adjust the spacing between the branch pipes connected to the main pipe and the approximately horizontal orientation of the tip of the branch pipe, and the raking reel position adjustment means is configured to adjust the position of the raking reel independently of each other.

3. The agricultural grain harvesting auxiliary mechanism for a large combine harvester described in claim 2, characterized in that the tilt / position adjustment structure of the branch pipe is further configured to allow free adjustment of the distance between the tip of the branch pipe and the cutting blade.

4. The agricultural grain harvesting auxiliary mechanism for a large combine harvester as described in claim 3, characterized in that the branch pipe tilt / position adjustment structure has an automatic branch pipe tip / cutting blade distance adjustment means that automatically adjusts the distance between the tip of the branch pipe and the cutting blade.

5. The agricultural grain harvesting auxiliary mechanism for a large combine harvester as described in claim 1, characterized in that the branch pipe direction / spacing adjustment structure is configured so that the approximately horizontal direction of the tip ends of all pairs of branch pipes can be adjusted simultaneously.

6. A large combine harvester comprising: a traveling section; a reaping section that reaps agricultural grain while being moved by the traveling section; a pair of reel support arms for mounting a raking reel; and a raking reel position adjustment means, wherein the reaping section has a cutting blade that is provided on a front lower edge of a platform and that reaps agricultural grain; A shaft member connected to a predetermined rotary drive shaft provided on the large combine; a centrifugal blower driven by rotation of the shaft member; a main pipe connected to the outlet of the centrifugal blower and having a portion disposed substantially parallel to the cutting blade in front of and above the cutting blade, and a plurality of pairs of branch pipes connected at predetermined intervals to the portions of the main pipe disposed substantially parallel to the cutting blade, and the branch pipes adjacent to each other in adjacent pairs are disposed close to each other; Equipped with Each of the branch pipes bends toward the cutting blade located rearward and downward, The tip end of each of the branch pipes is narrowed in the vertical direction of the pipe so that air is sprayed in a carpet-like manner toward a predetermined range that covers a portion of a divided area divided in the width direction of the area where the cutting blade is provided according to the number of the branch pipes, and has slit-shaped ejection holes that open forward and sideways, The pair of branch pipes in each set are arranged so that the tips of the pair of branch pipes approach each other so that the air jets ejected in a carpet shape from the slit-shaped ejection holes at the tip of each pair intersect at the tip of the cutting blade; and a branch pipe tilt / position adjustment structure for freely adjusting the tilt and height position of the tip of the branch pipe relative to the cutting blade within a predetermined range from a height position near the cutting blade to 100 cm above the cutting blade; a branch pipe direction / spacing adjustment structure for adjusting the spacing between the branch pipes connected to the main pipe and the substantially horizontal orientation of the tip ends of the branch pipes; A large combine harvester characterized by being equipped with an agricultural grain harvesting auxiliary mechanism.

7. The agricultural grain harvesting assist mechanism includes: the reel support arm and the air blowing pipe support member that supports the air blowing pipe are attached to different members on a platform; The large combine harvester described in claim 6, characterized in that the branch pipe tilt / position adjustment structure is configured to adjust the tilt and height position of the tip of the branch pipe relative to the cutting blade, the branch pipe orientation / spacing adjustment structure is configured to adjust the spacing between the branch pipes connected to the main pipe and the approximately horizontal orientation of the tip of the branch pipe, and the scavenging reel position adjustment means is configured to adjust the position of the scavenging reel independently of each other.

8. The large combine harvester described in claim 7, characterized in that the agricultural grain harvesting auxiliary mechanism is characterized in that the tilt / position adjustment structure of the branch pipe is further configured to freely adjust the distance between the tip of the branch pipe and the cutting blade.

9. The large combine harvester described in claim 8, characterized in that the branch pipe tilt / position adjustment structure of the agricultural grain harvesting auxiliary mechanism has an automatic branch pipe tip / blade spacing adjustment means that automatically adjusts the spacing between the tip of the branch pipe and the cutting blade.

10. A large combine harvester equipped with an agricultural grain harvesting assist mechanism as described in claim 6, characterized in that the surface of the front lower edge of the platform equipped with the cutting blade in the cutting section is formed into a substantially flat surface from the cutting blade toward the lateral feed auger.

11. The system comprises a conveying section equipped with a conveyor for conveying the agricultural grain harvested by the harvesting section, a threshing section equipped with a thresher for threshing the conveyed agricultural grain, a sorting section disposed below the thresher for shaking the agricultural grain transported by the conveying section and threshed by the threshing section to separate it into grains and other waste, and a feed pan disposed between the conveying section and the sorting section for receiving the threshed agricultural grain and for removing chaff and waste by blowing air from a cleaning fan. The large combine harvester according to claim 6, characterized in that the feed pan is configured to have a surface that slopes gently downward from the end on the conveying section side to a predetermined position toward the sorting section side.

12. The large combine harvester described in claim 6, characterized in that the branch pipe direction / spacing adjustment structure of the agricultural grain harvesting auxiliary mechanism is configured to enable the approximately horizontal direction of the tip ends of all pairs of branch pipes to be adjusted simultaneously.

13. A large combine harvester as described in claim 6, characterized in that it is equipped with a conveying section equipped with a conveyor that transports the agricultural grain harvested by the harvesting section, a threshing section equipped with a thresher that threshes the transported agricultural grain, a sorting section arranged below the threshing section that shakes the agricultural grain transported by the conveying section and threshed in the threshing section to separate it into grains and other waste, and a straw waste processing section that shreds the straw waste discharged by the threshing section, wherein the covers covering the sides and rear of the combine are removable, exposing the drive mechanism and piping, and each of the conveying section, the threshing section, the sorting section and the straw waste processing section is equipped with a window of a predetermined size and shape that allows the internal processing status to be observed from the outside and that allows work to be performed from the outside to resolve blockages, malfunctions and other internal problems.

14. A large combine harvester as described in claim 13, characterized in that the surfaces of each component present inside the conveying section, the threshing section, the sorting section, and the straw removal processing section are coated with an anti-static film or an anti-adhesion film.

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