Combine harvester

Abstract

To provide a combine harvester capable of suppressing abrasion in a supporting part of a slat bar constituting a conveyor of a conveying device and improving durability of the conveyor.SOLUTION: A combine harvester including a feeder 30 that conveys grain culms reaped by a reaping unit and supplies the grain culms to a threshing unit, the feeder 30 including a front drum 130 provided on a front side in a conveyance direction of the feeder 30, a sprocket that rotates integrally with a drive shaft provided on a rear side in the conveyance direction, left and right chains 110 wound around the front drum 130 and the sprocket, a plurality of slat bars 120 installed between the left and right chains 110, and a slat bar support unit 150 that supports the slat bars 120 with respect to the front drum 130, the slat bar support part 150 has a cylindrical part 151 that forms a contact surface with respect to the slat bar support part 150, and an annular part 152 that supports the cylindrical part 151 with respect to the front drum 130.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a combine harvester equipped with a conveying device that conveys stalks cut in a cutting section and supplies them to a threshing section. [Background technology]

[0002] Conventionally, there are combine harvesters equipped with a feeder, which is a conveying device that transports stalks harvested by the reaping section and supplies them to the threshing section. The feeder is configured with a conveyor for transporting stalks installed inside a feeder house as a housing. The conveyor has a reaping section input shaft with its axial direction running in the left-right direction of the machine body as a drive shaft that supports the end of the conveyor feed.

[0003] The conveyor in the feeder house is configured as a slat conveyor having chains installed parallel to each other on both the left and right sides of the feeder house and multiple slat bars, which are conveying pieces, installed between the left and right chains. The conveyor has the chain wound endlessly around a sprocket supported on the reaping unit input shaft and a cylindrical rotating body installed at the front end of the feeder house, and the rotation of the sprocket in conjunction with the rotation of the reaping unit input shaft drives the multiple slat bars to move while maintaining the wound state (see, for example, Patent Document 1).

[0004] In relation to the rotor around which the front portions of the left and right chains are wound, both longitudinal ends of the slat bar are supported by the rotor via the chain, and there is a gap between the slat bar and the outer circumferential surface of the rotor. Therefore, as disclosed in the drawings in Patent Document 1, a plate-shaped support part is protruded from the outer circumferential surface of the rotor to support the middle part of the slat bar in the longitudinal direction from the inner circumferential side of the wound shape of the chain. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 9-271245 Summary of the Invention [Problem to be solved by the invention]

[0006] The support parts provided on the outer peripheral surface of the rotor contact and support the longitudinal middle parts of the slat bars, thereby suppressing deflection of the slat bars when subjected to external forces from grain straw, etc. However, conventional support parts such as those disclosed in Patent Document 1 are prone to wear at the contact points between the support parts and the slat bars, leaving room for improvement in terms of durability.

[0007] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a combine that can suppress wear on the support parts of the slat bars that make up the conveyor of the transport device and improve the durability of the conveyor. [Means for solving the problem]

[0008] The combine of the present invention is a combine equipped with a conveying device that conveys straw cut in the cutting section and supplies it to the threshing section, and the conveying device has a rotating body provided on the front side of the conveying device in the conveying direction, a sprocket that rotates integrally with a drive shaft provided on the rear side of the conveying direction, left and right chains wound around the rotating body and the sprocket, a plurality of slat bars installed between the left and right chains, and a slat bar support portion that supports the slat bars on the rotating body, and the slat bar support portion has a contact portion that forms a contact surface with the slat bar and a support base that supports the contact portion on the rotating body.

[0009] In another aspect of the combine harvester according to the present invention, in the combine harvester, the slat bar support portions are provided at a plurality of locations in the direction of the rotation axis of the rotating body.

[0010] In another aspect of the combine harvester according to the present invention, in the combine harvester, the slat bar support portion has a rotating body shape with an axis coincident with a rotation center line of the rotating body.

[0011] In another aspect of the combine harvester according to the present invention, in the combine harvester, the slat bar support portion is provided so as to be inclined with respect to a direction perpendicular to the rotation center line of the rotating body.

[0012] Another aspect of the combine harvester according to the present invention is a combine harvester in which the slat bar support portion is inclined so as to impart a feeding action to the stratum toward the inside in the left-right direction of the body.

[0013] In another aspect of the combine harvester according to the present invention, the slat bars are provided with engagement portions that engage with the slat bar support portions.

[0014] The combine of the present invention is a combine equipped with a conveying device that conveys stalks cut in the cutting section and supplies them to the threshing section, and the conveying device has a rotating body provided on the front side of the conveying device in the conveying direction, a sprocket that rotates integrally with a drive shaft provided on the rear side of the conveying direction, left and right chains wound around the rotating body and the sprocket, a plurality of slat bars installed between the left and right chains, and a slat bar support portion that supports the slat bars on the rotating body, and the slat bar support portion is arranged in a spiral shape so as to give the stalks a feeding action along the axial direction of the rotating body.

[0015] Another aspect of the combine harvester of the present invention is a combine harvester in which the cutting section has a grain header with a built-in raking auger that is provided in front of the conveying device so as to communicate with the housing of the conveying device, the housing is provided in a position biased to one side of the left-right direction of the body relative to the grain header, and the direction of the feeding action is toward one side in the left-right direction. [Effects of the Invention]

[0016] According to the present invention, it is possible to suppress wear at the support portions of the slat bars that constitute the conveyor of the transport device, and to improve the durability of the conveyor. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a left side view of a combine harvester according to a first embodiment of the present invention. FIG. [Figure 2] 1 is a right side view of a combine harvester according to a first embodiment of the present invention. FIG. [Figure 3] 1 is a plan view of a combine harvester according to a first embodiment of the present invention. [Figure 4] 1 is a diagram showing a power transmission configuration in a combine harvester according to a first embodiment of the present invention. FIG. [Figure 5] 1 is a front perspective view showing the configuration of a feeder according to a first embodiment of the present invention. [Figure 6] 1 is a left side cross-sectional view showing the configuration of a feeder according to a first embodiment of the present invention. [Figure 7] FIG. 2 is a plan cross-sectional view showing the configuration of the front part of the feeder according to the first embodiment of the present invention. [Figure 8] 1 is a front view showing the configuration of a conveyor according to a first embodiment of the present invention. [Figure 9] FIG. 2 is a front perspective view showing a front drum and a slat bar support portion according to the first embodiment of the present invention. [Figure 10] 1 is a cross-sectional view showing the configuration of a slat bar support portion according to a first embodiment of the present invention. [Figure 11] FIG. 2 is a side cross-sectional view showing a front drum and a slat bar support portion according to the first embodiment of the present invention. [Figure 12] 10A and 10B are diagrams showing modified examples of the arrangement of slat bar support portions according to the first embodiment of the present invention. [Figure 13] FIG. 10 is a front perspective view showing a front drum and a slat bar support portion according to a second embodiment of the present invention. [Figure 14]FIG. 6 is a cross-sectional view showing the configuration of a slat bar support portion according to a second embodiment of the present invention. [Figure 15] FIG. 10 is a perspective view showing a support portion forming member according to a second embodiment of the present invention. [Figure 16] FIG. 10 is a front, partially cutaway cross-sectional view showing a front drum and a slat bar support portion according to a third embodiment of the present invention. [Figure 17] 17 is a cross-sectional view taken along the arrow XX in FIG. 16. [Figure 18] FIG. 10 is a front view showing a front drum and a slat bar support portion according to a fourth embodiment of the present invention. [Figure 19] FIG. 13 is a front perspective view showing a front drum and a slat bar support portion according to a fifth embodiment of the present invention. [Figure 20] FIG. 10 is a cross-sectional view showing the configuration of a slat bar support portion according to a fifth embodiment of the present invention. [Figure 21] FIG. 13 is a front view showing a front drum, a slat bar, and a slat bar support portion according to a sixth embodiment of the present invention. [Figure 22] FIG. 10 is a partial side cross-sectional view showing the configuration of a slat bar and a slat bar support portion according to a sixth embodiment of the present invention. [Figure 23] FIG. 13 is a front view showing a front drum and a slat bar support portion according to a seventh embodiment of the present invention. [Figure 24] FIG. 13 is an explanatory diagram of the action of the slat bar support portion according to the seventh embodiment of the present invention, and is a front view showing the arrangement of the platform and the feeder. DETAILED DESCRIPTION OF THE INVENTION

[0018] The present invention aims to suppress wear on the support parts and improve durability by configuring the support parts of the rotating body of multiple slat bars installed between left and right chains in a conveyor of a transport device to be supported in a surface contact manner or in a spiral configuration. The following describes an embodiment of the present invention.

[0019] [First embodiment] The overall configuration of a combine harvester 1 according to a first embodiment of the present invention will be described using Figures 1 to 4. In the following description, the left side (lower side in Figure 3) and the right side (upper side in Figure 3) when facing the front of the combine harvester 1 will be referred to as the left side and right side of the combine harvester 1, respectively.

[0020] As shown in Figures 1 and 2, the combine harvester 1 according to this embodiment is a conventional combine harvester that rakes harvested field crops (rice, wheat, soybeans, corn, etc.) into the machine body, threshes, sorts, stores the grain, and can then be transported outside the machine as needed. The combine harvester 1 has a self-propelled traveling body 2 and a reaping unit 3 attached to the front end of the traveling body 2. The reaping unit 3 is configured as a reaping device that harvests and collects unharvested stalks of rice, wheat, etc., and is attached to the traveling body 2 so that it can be raised and lowered.

[0021] The traveling machine body 2 includes a traveling unit 4 configured as a crawler-type traveling device having a pair of left and right crawler units 5, 5. A machine body frame 6 is provided above and between the left and right crawler units 5, 5. Each crawler unit 5 has multiple rotating bodies including a drive sprocket 5a provided at its front end, and tracks 5c wound around these rotating bodies. The drive sprocket 5a is rotated by power transmitted from an engine 25 provided in the combine 1.

[0022] On the left side of the machine frame 6, there are provided a threshing unit 7 that threshes the stalks cut and supplied by the reaping unit 3, and a sorting unit 8 that sorts the grains threshed by the threshing unit 7. The threshing unit 7 and the sorting unit 8 are arranged with the threshing unit 7 on the upper level and the sorting unit 8 on the lower level.

[0023] On the machine frame 6, to the right of the threshing section 7 and the sorting section 8, there is provided a grain storage section 9 having a grain tank 10 that stores the grain (clean grain) sorted by the sorting section 8. A lower discharge conveyor 11 is provided within the grain tank 10 to transport the stored grain toward the discharge outlet of the grain tank 10 (see Figure 4). A vertical transport conveyor 12 is installed upright in the vertical direction so as to communicate with the discharge outlet of the grain tank 10. A grain discharge conveyor 13 is connected to the upper end of the vertical transport conveyor 12. The grain discharge conveyor 13 is installed so as to be rotatable horizontally and swingable up and down around a horizontal axis. These conveyors transport the grain in the grain tank 10, and the grain is discharged into a truck bed, a container, etc. from a paddy discharge port 14 installed at the tip of the grain discharge conveyor 13.

[0024] A driver's section 15, where an operator sits, is provided on the machine frame 6 in front of the grain storage section 9, that is, at the front right side of the machine frame 6. The driver's section 15 is covered by a cabin 16. The driver's section 15 is provided with a driver's seat 17, a control handle 18 located in front of the driver's seat 17, and various operating sections such as a main speed change lever 19, an auxiliary speed change lever, and a work clutch lever (see Figure 2). The work clutch lever is a work operating tool for switching on and off the threshing clutch 57 and the reaping clutch 75 (see Figure 4).

[0025] An engine 25 serving as a drive source is provided below the driver's section 15 on the machine frame 6. The engine 25 is installed in the space below the driver's section 15, in the space on the right side of the front part of the machine frame 6. The engine 25 is, for example, a diesel engine.

[0026] The following describes the reaping unit 3. The reaping unit 3 has a feeder 30 as a conveying device, a platform 31 as a grain header, a cutting blade device 32, a pair of left and right grass dividing bodies 33, 33, and a raking reel .

[0027] The feeder 30 is a supply and conveyance device that transports the stalks harvested by the harvesting section 3 and supplies them to the threshing section 7. The feeder 30 has a feeder house 35 as a housing and a conveyor 36 (see Figure 4) for transporting the stalks that is provided within the feeder house 35. The feeder house 35 is configured in a substantially rectangular cylindrical shape with the longitudinal direction extending in the front-to-rear direction in a plan view. The feeder 30 is located to the left of the cabin 16 (see Figure 3), and the rear end opening of the feeder house 35 is connected to the front handling opening 7a of the threshing section 7 (see Figure 1).

[0028] The platform 31 is configured in the shape of a horizontally elongated bucket and is connected to the front side of the feeder 30 so as to communicate with the front end opening of the feeder house 35. The feeder house 35 is provided at a position to the left of the center in the left-right direction with respect to the platform 31. A raking auger (platform auger) 37 is provided within the platform 31. The raking auger 37 is axially mounted so as to be rotatable with the left-right direction as the rotation axis direction.

[0029] The cutting blade device 32 is mounted on the front lower edge of the platform 31 and is configured like a pair of clippers. A pair of left and right grass dividing bodies 33, 33 are mounted so as to protrude forward from the left and right sides of the front of the platform 31. The raking reel 34 is a reel with a tine bar and is mounted in a position above and in front of the raking auger 37. The raking reel 34 is supported rotatably with the left and right directions as the rotation axis between the tips of a pair of left and right reel support arms 34a, 34a whose base ends are pivotally supported on the platform 31. As it rotates, the raking reel 34 continuously acts on the pod-bearing portions of the stalks and rakes the pod-bearing portions of the stalks toward the raking auger 37. The operation of each part of the reaping unit 3 uses power from the engine 25, transmitted via various transmission mechanisms.

[0030] A front rotor 26 is provided behind the feeder 30 to send the stalks transported by the conveyor 36 into the threshing opening 7a. The front rotor 26 is provided between the end of the conveyor 36 and the threshing opening 7a. The front rotor 26 has a roughly cylindrical rotor body 27, also known as a beater, and a front rotor shaft 28 (see Figure 4) whose axial direction is in the left-right direction. The stalks transported by the feeder 30 are fed from the end of the conveyor 36 by the front rotor 26 through the threshing opening 7a and into the threshing chamber 7b of the threshing section 7.

[0031] The conveyor 36 in the feeder house 35 has a reaping unit input shaft (feeder house conveyor shaft) 38, which is provided in front of the threshing unit 7 and has an axial direction in the left-right direction, as a drive shaft supporting the end of the feeding end of the conveyor 36. The rear end of the feeder 30 is supported rotatably relative to the traveling machine body 2, with the reaping unit input shaft 38 as the rotation axis. In addition, a lifting cylinder 39 (see Figure 1), which is a hydraulic cylinder, is interposed between the underside of the feeder house 35 and the machine body frame 6.

[0032] The reaping unit 3 is configured to move up and down by the rotation of the feeder 30 relative to the traveling body 2 as the lifting cylinder 39 extends and retracts. By the lifting and lowering operation of the reaping unit 3, the reaping unit 3 moves up and down around the reaping unit input shaft 38 as a pivot shaft, thereby adjusting the height of the reaping unit 3. The lifting and lowering operation of the reaping unit 3 is operated by a predetermined operating unit provided in the driving unit 15.

[0033] The threshing section 7 and the sorting section 8 will now be described. The threshing section 7 has a threshing drum 40 provided in a threshing chamber 7b with a threshing opening 7a opening to the front, and a receiving net 42 disposed below the threshing drum 40. The threshing chamber 7b is formed by a machine frame provided on the machine frame 6.

[0034] The threshing drum 40 is rotatably supported by a threshing drum shaft 41 (see Figure 4) whose axial direction is the front-to-rear direction. On the upper side of the threshing drum 40, multiple angle-adjustable dust-transfer valves are provided to adjust the transport speed (retention time) of the de-grained grains in the threshing chamber 7b. A receiving net 42 is provided along the outer peripheral surface of the lower part of the threshing drum 40 to allow the grains to drop through.

[0035] The sorting section 8 has a swinging sorting plate 43 as a swinging section arranged below the receiving net 42, a swinging mechanism 44 including a swinging shaft 44a that swings the swinging sorting plate 43 by rotational power from a drive source, a first conveyor 45, a second conveyor 46, and a winnower 47 (see Figure 4). As shown in Figure 4, a pre-fan 71 is provided in front of the winnower 47, and a second fan 72 is provided behind the winnower 47.

[0036] The oscillating sorting plate 43 has components for gravity sorting, such as a feed pan, a chaff sieve located behind the feed pan to adjust the amount of grain leakage, and a grain sieve located below the chaff sieve. The first conveyor 45 is located in the first trough extending in the width direction of the machine body to collect the first grains. The second conveyor 46 is located behind the first conveyor 45 in the second trough extending in the width direction of the machine body to collect the second grains. The winnower 47 blows sorting air from the front lower to the rear upper to the oscillating sorting plate 43.

[0037] A return conveyor 48 is provided on the right side of the machine body where the threshing section 7 and sorting section 8 are located (see Figure 4). The return conveyor 48 is connected to the second conveyor 46 with its lower end located near the second conveyor 46, and its upper end is located near the front end of the threshing drum 40, extending in an upward-facing incline. A grain lifting conveyor 49 extending vertically is provided to the right of the return conveyor 48. The grain lifting conveyor 49 transports the first grain sent by the first conveyor 45 into the grain tank 10.

[0038] The combine harvester 1 having the above-described configuration raises the reaping unit 3 to a desired height above the ground (the height at which the culms, which are the harvested crops, are to be reaped) in a field by raising and lowering the feeder 30 with the reaping unit input shaft 38 as the center (support shaft), changes from a non-working state to a working state, and travels in this state using the traveling body 2. As a result, the combine harvester 1 separates the harvested crop into reaping targets and non-reaping targets using the left and right dividing bodies 33, 33, and raks in the pod-bearing portions of the culms on the tip side of the reaping targets using the raking reel 34 while reaping the pod-bearing portions of the culms using the cutting blade device 32.

[0039] The pod-bearing portions of the stalks harvested at the desired harvesting position are raked into the platform 31 by the rotating raking auger 37, and are collected near the intake port of the feeder house 35 within the platform 31 by the feeding action of the raking auger 37, and are taken into the feeder house 35 through the intake port. The stalks taken into the feeder house 35 are passed through the feeder house 35 by the conveyor 36, and are thrown into the threshing port 7a by the front rotor 26, and are supplied to the threshing section 7.

[0040] The pod-bearing portions of the stalks supplied to the threshing section 7 are threshed by the threshing section 7. Specifically, the stalks supplied to the threshing section 7 are transported rearward by the rotating threshing drum 40 and threshed mainly between the threshing drum 40 and the receiving net 42. Grains that are smaller than the mesh size of the receiving net 42 leak through the receiving net 42. Straw chips that do not leak through the receiving net 42 are discharged into the field through a dust outlet located at the rear of the sorting section 8 by the transporting action of the threshing drum 40.

[0041] Meanwhile, the grains that have been threshed in the threshing section 7 and that have leaked through the receiving net 42 are sorted in the sorting section 8. Specifically, the threshed grains that have been threshed in the threshing drum 40 and that have leaked through the receiving net 42 are sorted by gravity sorting action by the oscillating sorting plate 43 and wind sorting action by the winnower 47 into refined grains and other grains (first grade), a mixture of grains such as grains with stalks and straw (second grade), and straw chips, etc., and are removed.

[0042] The grains (first grain) that fall from the oscillating sorting plate 43 after sorting in the sorting section 8 are transported to the grain tank 10 by the first conveyor 45 and the connected grain lifting conveyor 49. The second grains are returned to the threshing start end of the threshing drum 40 by the second conveyor 46 and the connected return conveyor 48, and are threshed again. Straw dust and the like are discharged into the field from a dust outlet provided at the rear of the sorting section 8.

[0043] Next, the power transmission configuration of the combine harvester 1 according to this embodiment will be described with reference to Figure 4. The combine harvester 1 uses rotational power from an engine 25 to drive the reaping unit 3, traveling unit 4, threshing unit 7, sorting unit 8, and grain storage unit 9.

[0044] The engine 25 has a first output shaft 25a and a second output shaft 25b. The rotational power of the first output shaft 25a is transmitted to the traveling unit 4, the threshing unit 7, the sorting unit 8, and the reaping unit 3. The rotational power of the second output shaft 25b is transmitted to the grain storage unit 9. The engine 25 also has a work implement pump shaft that drives a charge pump 54 that operates the lifting cylinder 39 and the like.

[0045] Regarding the power transmission system to the traveling unit 4, the rotational power of the first output shaft 25a is transmitted to the HST input shaft 52 by the first belt transmission mechanism 51 and input to the transmission 53, which includes the traveling HST and the swing HST. Here, "HST" refers to a hydraulic continuously variable transmission that uses a system in which hydraulic pressure generated by driving a hydraulic pump is converted back into rotational power by a hydraulic motor. The driving force of the transmission 53 rotates the drive sprocket 5a of the crawler unit 5 that constitutes the traveling unit 4.

[0046] Regarding the power transmission system to the threshing unit 7, the rotational power of the first output shaft 25a is transmitted to the threshing unit input shaft 56 by a second belt transmission mechanism 55. The second belt transmission mechanism 55 is provided with a threshing clutch 57 that transmits the rotational power of the first output shaft 25a to the threshing unit input shaft 56 intermittently as desired.

[0047] The rotational power of the threshing unit input shaft 56 is transmitted to the threshing drum input shaft 59 by a third belt transmission mechanism 58. The rotational power of the threshing drum input shaft 59 is transmitted to the threshing drum shaft 41 via a threshing speed change device 60. The threshing speed change device 60 changes the speed of the rotational power input from the threshing drum input shaft 59 to the threshing drum shaft 41, for example, between two stages, high speed and low speed.

[0048] With this configuration, the driving force of the engine 25 is transmitted to the threshing unit 7. Then, by operating the work clutch lever provided on the driving unit 15, the threshing clutch 57 is turned ON / OFF, thereby interrupting the transmission of power to the threshing unit 7.

[0049] With regard to the power transmission system to the sorting section 8, the threshing section input shaft 56 has a support shaft portion for the winnower 47, and the rotational power of the threshing section input shaft 56 is transmitted to a pulley rotor 63 journaled on a threshing intermediate shaft 62 by a fourth belt transmission mechanism 61. The rotational power of the pulley rotor 63 is transmitted to the pre-fan 71 and the winnower 47 by a predetermined transmission mechanism. In addition, the rotational power of the threshing section input shaft 56 is transmitted to the respective rotational shafts of the first conveyor 45, the second fan 72 and the second conveyor 46 by a predetermined transmission mechanism.

[0050] The rotational power of the first conveyor 45 is transmitted to the grain lifting conveyor 49 by a predetermined transmission mechanism. The rotational power of the second conveyor 46 is transmitted to the swing shaft 44a of the swing mechanism 44 by a fifth belt transmission mechanism 64. The rotational power of the second conveyor 46 is transmitted to the return conveyor 48 via a bevel gear.

[0051] With regard to the power transmission system to the reaping unit 3, the rotational power of the pulley rotor 63 is transmitted to the front rotor shaft 28 by a sixth belt transmission mechanism 73. The sixth belt transmission mechanism 73 is provided with a reaping clutch 75 that optionally transmits the rotational power of the pulley rotor 63 to the front rotor shaft 28. The rotational power of the front rotor shaft 28 is transmitted to the reaping unit input shaft 38 by a first chain transmission mechanism 65. The rotational drive of the reaping unit input shaft 38 operates the conveyor 36 in the feeder house 35.

[0052] The rotational power of the cutting unit input shaft 38 is transmitted to a PF (platform) drive shaft 67 by a second chain transmission mechanism 66. The rotational power of the PF drive shaft 67 is transmitted to a PF auger shaft 37a that rotates the sweeping auger 37 via a third chain transmission mechanism 68. The rotational power of the PF drive shaft 67 is also transmitted to a cutting blade drive shaft 32a that drives the cutting blade device 32 via a seventh belt transmission mechanism 69. The rotational power of the PF drive shaft 67 is also transmitted to a reel shaft 34b that rotates the sweeping reel 34 by a fourth chain transmission mechanism 76 that includes a reel counter shaft 70.

[0053] With this configuration, the driving force of the engine 25 is transmitted to the reaping unit 3. Then, by operating the work clutch lever provided on the driving unit 15, the reaping clutch 75 is turned on / off, thereby connecting and disconnecting the power transmission to the reaping unit 3.

[0054] With regard to the power transmission system to the grain storage section 9, the rotational power of the second output shaft 25b is transmitted to the lower discharge conveyor 11 by a power transmission mechanism including a grain tank intermediate shaft 77, and the rotational power of the lower discharge conveyor 11 is transmitted to the vertical transport conveyor 12 via a bevel gear. The rotational power of the vertical transport conveyor 12 is transmitted to the grain discharge conveyor 13 by a predetermined transmission mechanism. The grain storage section 9 is equipped with a suction fan 78 and a compressor 79, which are driven by the rotational power transmitted from the grain tank intermediate shaft 77.

[0055] In the combine harvester 1 having the above-described configuration, the feeder 30 provided between the reaping section 3 and the threshing section 7 will be described with reference to FIGS. 5 to 12. FIG.

[0056] The feeder 30 includes a conveyor 36 in a feeder house 35, the conveyor 36 having a reaping unit input shaft 38 as a drive shaft, which rotates upon receiving power transmitted from the engine 25 as described above.

[0057] The feeder house 35 has left and right side surfaces 101, a bottom surface 102, and a top surface 103, which together form a cylindrical body with openings at both the front and rear ends. At the front end of the feeder house 35, the front ends of the left and right side surfaces 101, the bottom surface 102, and the top surface 103 form a substantially horizontally elongated rectangular opening 104. At the rear end of the feeder house 35, the rear ends of the left and right side surfaces 101, the bottom surface 102, and the top surface 103 form a substantially horizontally elongated rectangular opening 105. A support bracket 106 is provided at the front of the bottom surface 102 of the feeder house 35 to rotatably support the front end of the lifting cylinder 39.

[0058] The conveyor 36 is configured as a slat conveyor having chains 110 installed parallel to each other on both the left and right sides within the feeder house 35, and slat bars 120, which are multiple conveying pieces, installed between the left and right chains 110.

[0059] The slat bar 120 is provided on the outer periphery of the chain 110. The slat bar 120 is a long, thin member whose longitudinal direction is the installation direction (left-right direction) between the left and right chains 110, and is a bent plate-like member with a substantially U-shaped cross section.

[0060] The slat bar 120 has a substantially U-shaped cross section, which includes a bottom surface 121 that forms the fixing surface of the slat bar 120 relative to the chain 110, and a front wall 122 and a rear wall 123 that rise at right angles from both the front and rear sides in the rotation direction of the chain 110 relative to the bottom surface 121 and form front and rear walls. The height of the front wall 122 from the bottom surface 121 is lower than that of the rear wall 123.

[0061] The left and right ends of the slat bar 120 are fixed to the left and right chains 110 with bolts 125 and nuts 126. The chain 110 has a configuration in which a plurality of inner links and outer links serving as chain elements are alternately combined and connected endlessly, and has outer links 111 for mounting the slat bars 120 at predetermined intervals in the extension direction.

[0062] The pair of outer plates 112 that make up the mounting outer link 111 have, in addition to a main plate portion that makes up the main body of the chain 110, mounting portions 112a that securely support the slat bar 120. The mounting portions 112a are plate-like portions that are bent outward to the left and right on the outer periphery of the chain 110 so as to form a right angle together with the main plate portions of the outer plates 112.

[0063] The left and right ends of the bottom surface portion 121 of each slat bar 120 are overlapped with the left and right mounting portions 112a of the outer plate 112 from the outer periphery of the chain 110, and the slat bars 120 are fixed with bolts 125 and nuts 126. The bolts 125 pass through the bottom surface portion 121 and the mounting portions 112a and are screwed into the nuts 126. In the conveyor 36 according to this embodiment, eleven slat bars 120 are attached to the left and right chains 110 at predetermined intervals in the extension direction of the chains 110.

[0064] The chain 110 is wound around a sprocket 113, which is provided to rotate integrally with the reaping unit input shaft 38, and a front drum 130, which is a cylindrical rotating body provided at the front end of the feeder house 35. In other words, the chain 110 is endlessly wound around the sprocket 113 and the front drum 130, and the rotation of the sprocket 113 accompanying the rotation of the reaping unit input shaft 38 drives the slat bar 120 to move while maintaining the wound state. The conveyor 36 is provided so that the entire sprocket 113 and the front drum 130 are each located within the feeder house 35.

[0065] The reaping unit input shaft 38 penetrates the left and right side surfaces 101 of the feeder house 35 and is arranged to rotate relative to the side surfaces 101 via bearing members such as cylindrical bushings. The sprockets 113 are fixed to both left and right ends of the part of the reaping unit input shaft 38 that is installed inside the feeder house 35 with fasteners such as bolts. The rear portion of the chain 110 is engaged with the sprockets 113.

[0066] A cylindrical anti-winding tube 115 is provided on the cutting unit input shaft 38 between the left and right sprockets 113. The anti-winding tube 115 is a hollow cylindrical portion that is arranged concentrically with the cutting unit input shaft 38 and has a cylindrical outer circumferential surface with a smaller diameter than the sprockets 113. The anti-winding tube 115 is fixed to the cutting unit input shaft 38 with a fastener such as a bolt (not shown) and is provided so as to rotate integrally with the cutting unit input shaft 38. The anti-winding tube 115 is provided over the entire range between the left and right sprockets 113 in the axial direction of the cutting unit input shaft 38.

[0067] The front drum 130 is rotatably supported by a rotor support shaft 116 provided near the front end of the feeder house 35. The rotor support shaft 116 passes through the left and right side surface portions 101 of the feeder house 35 with its axial direction extending in the left-right direction, and is provided in a state where it is fixed to the left and right side surface portions 101.

[0068] The front drum 130 is a hollow cylindrical rotating body arranged concentrically with the rotating body support shaft 116. The front drum 130 has a drum main body 131, which is a cylindrical member with both axial ends open, and a pair of cylindrical covering bodies 132, which are cylindrical members covering both axial ends of the drum main body 131.

[0069] The drum main body 131 is a cylindrical body that forms the outer shape of the front drum 130, and has a length that extends axially across substantially the entire space between the left and right side surface portions 101 of the feeder house 35. The thickness (plate thickness) of the peripheral wall of the drum main body 131 is sufficiently small compared to the outer diameter of the front drum 130. The drum main body 131 has disk-shaped support wall portions 134 near both left and right ends thereof that form support portions for the rotor support shaft 116. The support wall portions 134 are partition-like portions with their plate thickness direction in the left-right direction, and are formed to divide the internal space of the drum main body 131 in the left-right direction.

[0070] Rotor support shaft 116 passes through the center of support wall 134, and is rotatably supported by rotor support shaft 116 via a support member 135 and a bearing 136. Support member 135 is a member that passes through the center of support wall 134 and forms a partition wall together with support wall 134, and is fixed to support wall 134 with bolts 137 or the like whose axial direction is in the left-right direction, with rotor support shaft 116 passing through the center. Bearing 136 supports rotor support shaft 116 relative to support member 135, with rotor support shaft 116 passing through it.

[0071] The cylindrical covering body 132 covers the entire circumferential direction of the drum body 131 on both left and right ends thereof, from the open end of the drum body 131 to about 1 / 7 to 1 / 5 of the overall length of the drum body 131. The cylindrical covering body 132 has a peripheral wall with substantially the same thickness as the peripheral wall of the drum body 131. However, the thickness relationship between the drum body 131 and the cylindrical covering body 132 is not limited. The cylindrical covering body 132 is fixed to the drum body 131 by welding or the like, with its inner peripheral surface in contact with the outer peripheral surface of the drum body 131.

[0072] The cylindrical covering body 132 has an inner edge in the left-right direction that forms an expanding portion 132a whose diameter gradually expands from the left-right outer side to the inside. An annular sealing member 138 such as an O-ring is interposed in the gap between the cylindrical covering body 132 and the outer circumferential surface of the drum main body 131, which is formed by the expanding portion 132a.

[0073] The front drum 130 configured as described above has, as its outer circumferential surface, end outer circumferential surface portions 130a formed by the outer circumferential surfaces of the cylindrical coverings 132 at both left and right ends, and an intermediate outer circumferential surface portion 130b which is the portion of the outer circumferential surface of the drum main body 131 that is exposed between the left and right cylindrical coverings 132. The wall thickness of the cylindrical coverings 132 is sufficiently small compared to the outer diameter of the front drum 130, so that the end outer circumferential surface portions 130a and the intermediate outer circumferential surface portion 130b form a substantially flush outer circumferential surface of the front drum 130. Furthermore, at the boundary between each of the left and right end outer circumferential surface portions 130a and the intermediate outer circumferential surface portion 130b, a protrusion 130c is formed along the outer circumferential surface of the front drum 130 by the expansion portion 132a and the seal member 138.

[0074] The front drum 130 receives the front portions of the left and right chains 110 wound around it. The chains 110 are wound around a cylindrical covering body 132 around the front drum 130. More specifically, the chains 110 are positioned near the outsides of the left and right protrusions 130c around the front drum 130. The protrusions 130c restrict misalignment of the chains 110 in the left-right direction.

[0075] Dustproof covers 139, which are disk-shaped members that close the openings on both the left and right ends of the drum body 131, are provided on both the left and right sides of the front drum 130. The dustproof covers 139 have an outer diameter that is approximately the same as the inner diameter of the drum body 131, and are fixed to the side surface 101 of the feeder house 35 with a plurality of bolts 140 or the like that pass through the side surface 101 and the dustproof cover 139, with the disk-shaped main body overlapping the side surface 101 from the inside. The dustproof cover 139 has peripheral walls that rise inward on the left and right sides from the disk-shaped main body, and engages with the drum body 131 with parts of the peripheral walls fitted into the open ends of the drum body 131.

[0076] A tension adjustment mechanism 145 for adjusting the tension of the chain 110 is provided on the outside of the side surface 101 of the feeder house 35, from which the left and right ends of the rotor support shaft 116 protrude. The tension adjustment mechanism 145 has an adjustment shaft 146 that penetrates the end of the rotor support shaft 116 in the radial direction.

[0077] The adjustment shaft 146 is inclined downward toward the front so that its axial direction is aligned with the conveying direction of the conveyor 36 in a side view, and the portion protruding forward from the rotor support shaft 116 is fixed to the side surface 101 of the feeder house 35 by a bolt 149 or the like via a support member such as a stay 147. The tension adjustment mechanism 145 is configured to adjust the position of the rotor support shaft 116 with respect to the side surface 101 of the feeder house 35 by operating an adjustment nut 148 that is threaded onto the portion of the adjustment shaft 146 that protrudes rearward from the rotor support shaft 116, thereby adjusting the front-to-rear position of the front drum 130 and adjusting the tension of the chain 110.

[0078] With the above configuration, the conveyor 36 rotates in the forward direction as the reaping unit input shaft 38 rotates counterclockwise (left rotation direction) when viewed from the left side (see arrow A1 in Figure 6), and the stalks taken into the feeder house 35 by the raking auger 37 are hooked onto the slat bar 120 and transported diagonally upward and rearward. That is, when the conveyor 36 is driven, the path portion of the straight chain 110 located below the sprocket 113 and front drum 130 is the forward path portion moving from front to rear, and the path portion of the straight chain 110 located above the sprocket 113 and front drum 130 is the return path portion moving from rear to front. The stalks transported by the conveyor 36 are acted upon by the front rotor 26 from the feeder house 35 and supplied to the threshing unit 7 through the threshing opening 7a.

[0079] As described above, the feeder 30 has, on the conveyor 36, a front drum 130 provided at the front side of the feeder 30 in the conveying direction, a sprocket 113 that rotates integrally with the cutting section input shaft 38 provided at the rear side of the feeder 30 in the conveying direction, left and right chains 110 wound around the front drum 130 and sprocket 113, and a plurality of slat bars 120 installed between the left and right chains 110.

[0080] In the conveyor 36 configured as described above, the slat bar 120 is supported at both longitudinal ends by the front drum 130 via the chains 110, with the front drum 130 receiving the front portions of the left and right chains 110, and a gap is formed between the slat bar 120 and the intermediate outer peripheral surface portion 130b of the front drum 130 in the longitudinal middle portion. In other words, the slat bar 120 is spaced radially outward from the outer peripheral surface of the front drum 130 by the amount of the chains 110 interposed between the slat bar 120 and the outer peripheral surface of the front drum 130, and a gap is formed between the slat bar 120 and the intermediate outer peripheral surface portion 130b in the portion between the left and right chains 110.

[0081] Therefore, the conveyor 36 has a slat bar support portion 150 that supports the slat bar 120 relative to the front drum 130. The slat bar support portion 150 is provided on the outer periphery of the front drum 130 and supports the middle portion of the slat bar 120 in the longitudinal direction from the inner periphery of the wound form of the chain 110.

[0082] The slat bar support portion 150 has a cylindrical portion 151, which is a contact portion that forms a contact surface with the slat bar 120, and an annular portion 152, which is a support base that supports the cylindrical portion 151 with respect to the front drum 130. The slat bar support portion 150 is provided as a portion fixed to the front drum 130, and rotates integrally with the front drum 130.

[0083] The slat bar support portion 150 forms an expanded diameter portion in which a portion of the axial direction (left-right direction, hereinafter referred to as the "drum axial direction") of the front drum 130 is expanded in diameter relative to the intermediate outer circumferential surface portion 130b, and has an outer circumferential support surface 155 which is a cylindrical surface coaxial with the front drum 130 as a contact surface with the slat bar 120. The outer circumferential support surface 155 is a sliding contact surface with the lower surface 121a, which is the surface of the plate surface of the bottom surface portion 121 of the slat bar 120 facing the inner circumferential side of the chain 110 (see FIG. 11).

[0084] The cylindrical portion 151 is a cylindrical portion having an outer diameter larger than those of the drum main body 131 and the cylindrical covering body 132. The outer peripheral surface of the cylindrical portion 151 serves as an outer peripheral support surface 155 of the slat bar support portion 150. The cylindrical portion 151 has a cylindrical inner peripheral surface 153 and side end surfaces 154 on both sides in the width direction (drum axis direction) of the cylindrical portion 151 (see Figures 10 and 11). The side end surfaces 154 are formed as surfaces perpendicular to the drum axis direction.

[0085] The annular portion 152 is a plate-like portion whose thickness direction is in the drum axial direction, and whose outer diameter matches the inner diameter of the cylindrical portion 151 and whose inner diameter matches the outer diameter of the drum main body 131. The annular portion 152 has plate surfaces 156 on both left and right sides.

[0086] The annular portion 152 has a thickness smaller than the width (left-right dimension in FIG. 10) of the cylindrical portion 151, and is located at the center in the width direction of the cylindrical portion 151. In this embodiment, the thickness of the annular portion 152 is approximately the same as the thickness of the peripheral wall portion of the cylindrical portion 151. The slat bar support portion 150 is T-shaped by the cylindrical portion 151 and the annular portion 152 in a cross section passing through the axis of the rotor support shaft 116 of the front drum 130 (see FIG. 10).

[0087] The slat bar support portion 150 has a rotating body shape whose axis is the rotation center line C1 of the front drum 130, which coincides with the axis of the rotating body support shaft 116. In other words, the slat bar support portion 150 is provided endlessly around the entire circumferential direction of the front drum 130. In other words, the slat bar support portion 150 is provided so that the cylindrical portion 151 and the annular portion 152 form a constant T-shaped cross section around the entire circumferential direction of the front drum 130.

[0088] The slat bar support portion 150 has a cylindrical portion 151 and an annular portion 152, which are open on both the left and right sides and form annular grooves 170 together with the drum body 131 on both the left and right sides.

[0089] In this embodiment, the slat bar support portion 150 is made up of two members: a first member 161 which is a cylindrical member forming the cylindrical portion 151, and a second member 162 which is an annular member forming the annular portion 152 (see FIG. 10). The first member 161 and the second member 162 are fixed to each other by welding, and form an integrated slat bar support portion 150.

[0090] 10 , the second member 162 has an annular surface that forms the left and right plate surfaces 156 of the annular portion 152, an outer peripheral surface 163 that is the outer peripheral end surface, and an inner peripheral surface 164 that is the inner peripheral end surface. With the outer peripheral surface 163 of the second member 162 in contact with the inner peripheral surface of the first member 161 that forms the inner peripheral surface 153 of the cylindrical portion 151, the first member 161 and the second member 162 are fixed to each other by outer peripheral welds 171 that are located at corners between the inner peripheral surface (inner peripheral surface 153) of the first member 161 and the left and right plate surfaces (plate surfaces 156) of the second member 162 in a cross-sectional view. The outer peripheral welds 171 are welds that are either fully or partially welded in the circumferential direction of the slat bar support portion 150.

[0091] 10 , with the inner circumferential surface 164 of the second member 162 in contact with the middle outer circumferential surface portion 130b of the drum body 131, the second member 162 and the drum body 131 are fixed to each other by inner circumferential welds 172 located at corners formed by the middle outer circumferential surface portion 130b and the left and right plate surfaces (plate surfaces 156) of the second member 162 in a cross-sectional view. The inner circumferential welds 172 are welded portions that are entirely or partially welded in the circumferential direction of the drum body 131.

[0092] The method for fixing the first member 161 and the second member 162 and the method for fixing the second member 162 and the drum main body 131 are not particularly limited. For example, fasteners such as bolts may be used to fix these members together. Furthermore, the member that forms the slat bar support portion 150 may be an integrally molded product (one part) such as a casting.

[0093] The dimensions of each part of the slat bar support portion 150 are, for example, as follows: As shown in FIG. 10 , the width dimension of the slat bar support portion 150, i.e., the width dimension D1 of the outer circumferential support surface 155, is, for example, 30 mm. The thickness dimension T1 of the cylindrical portion 151 is, for example, 3.0 mm. The thickness dimension T2 of the annular portion 152 is, for example, 3.5 mm. The height dimension H1 of the annular portion 152 is, for example, 20 mm. The height dimension H1 is the dimension between the intermediate outer circumferential surface portion 130b and the outer circumferential surface 163 in the radial direction of the front drum 130.

[0094] In this embodiment, the thickness T1 of the cylindrical portion 151 and the thickness T2 of the annular portion 152 are greater than the thickness T3 of the peripheral wall of the drum main body 131. Note that the dimensions of each part of the slat bar support portion 150 are merely examples and are not intended to limit the dimensions of each part.

[0095] The slat bar support portions 150 are provided at multiple locations in the direction of the rotation axis of the front drum 130. In this embodiment, the slat bar support portions 150 are provided at two locations on both the left and right sides in a symmetrical arrangement on the middle outer peripheral surface portion 130b.

[0096] The width dimension D1 of the slat bar support portions 150 is approximately 1 / 15 to 1 / 20 of the overall length (left-right dimension) of the drum main body 131. Furthermore, the width dimension D1 is approximately 1 / 10 to 1 / 13 of the left-right dimension of the intermediate outer peripheral surface portion 130b. Each slat bar support portion 150 is disposed in the center of each half of the left and right sides of the intermediate outer peripheral surface portion 130b in the left-right direction.

[0097] In this embodiment, the slat bar support portions 150 are provided at two locations in the drum axial direction, but the number and locations of the slat bar support portions 150 are not particularly limited. For example, as shown in FIG. 12A, the slat bar support portions 150 may be provided at three or more locations. The example shown in FIG. 12A shows a configuration in which the slat bar support portions 150 are provided at three locations. The example shown in FIG. 12A also shows a configuration in which the width of the slat bar support portions 150 is slightly narrower than in a configuration in which the slat bar support portions 150 are provided at two locations.

[0098] 12B, the slat bar support portion 150 may be provided in one location in the center in the drum axial direction. In the example shown in Fig. 12B, the width of the slat bar support portion 150 is wider than in a configuration in which multiple slat bar support portions 150 are arranged. As shown in Figs. 8, 12A, and 12B, it is preferable that the arrangement of one or more slat bar support portions 150 be symmetrical.

[0099] The combine harvester 1 of this embodiment, which has the above-mentioned configuration, has the effect of suppressing the deflection of the slat bars 120 when subjected to external forces from grain straws, etc., and can also suppress wear on the support parts of the slat bars 120 that constitute the conveyor 36 of the feeder 30, thereby improving the durability of the conveyor 36.

[0100] The conveyor 36 is provided with a slat bar support portion 150 on the front drum 130. The slat bar support portion 150 has a cylindrical portion 151 that forms an outer peripheral support surface 155 that contacts the slat bar 120, and an annular portion 152 that supports the cylindrical portion 151 on the front drum 130. With this configuration, the cylindrical portion 151 with the outer peripheral support surface 155 can support the longitudinal middle portion of the slat bar 120 in a surface-contact manner, thereby reducing the support pressure on the slat bar 120. This reduces stress concentration at the support portion of the slat bar 120 and suppresses wear. As a result, the durability of the slat bar 120 and other components of the conveyor 36 can be improved.

[0101] Furthermore, the slat bar support portions 150 are provided at multiple locations in the drum axial direction. With this configuration, the number of support portions for the slat bar 120 increases, making it easy to ensure the area of ​​the support surface, effectively suppressing wear on the support portions for the slat bar 120, and stably supporting the slat bar 120.

[0102] Furthermore, the slat bar support portion 150 has a shape of a body of revolution with its axis coincident with the rotation center line C1 of the slat bar 120. With this configuration, the outer peripheral support surface 155, which is the support surface for the slat bar 120, is formed around the entire circumference of the front drum 130, so the support action of the slat bar support portion 150 for the multiple slat bars 120 can be made uniform, and the amount of wear at the support portion of each slat bar 120 can be made uniform. Furthermore, because the support action of the slat bar support portion 150 for the slat bar 120 against the front drum 130 is made uniform, stable transport operation of the conveyor 36 can be obtained.

[0103] [Second embodiment] A second embodiment of the present invention will be described with reference to Figures 13 to 15. In each embodiment of the present invention described below, the same names or symbols are used for configurations that are common to or correspond to the first embodiment, and descriptions of overlapping content will be omitted as appropriate.

[0104] 13 to 15, the slat bar support part 150A according to this embodiment has a cylindrical part 251 which is a contact part that forms a contact surface with the slat bar 120, and an annular part 252 which is a support base that supports the cylindrical part 251 with respect to the front drum 130. The slat bar support part 150A is provided as a part fixed to the front drum 130, and rotates integrally with the front drum 130.

[0105] The slat bar support portion 150A has an outer peripheral support surface 255, which is a cylindrical surface coaxial with the front drum 130, as a contact surface with the slat bar 120.

[0106] The cylindrical portion 251 is a cylindrical portion having an outer diameter larger than those of the drum main body 131 and the cylindrical covering body 132. The outer peripheral surface of the cylindrical portion 251 serves as an outer peripheral support surface 255 of the slat bar support portion 150A. The cylindrical portion 251 has a cylindrical inner peripheral surface 253 and a side end surface 254 on one side in the width direction of the cylindrical portion 251 (the right side in FIG. 14). The side end surface 254 is formed as a surface perpendicular to the drum axial direction.

[0107] The annular portion 252 is a plate-like portion whose thickness direction is in the drum axial direction and whose inner diameter matches the outer diameter of the drum main body 131. The annular portion 252 has plate surfaces 256 on both left and right sides.

[0108] The annular portion 252 has a thickness smaller than the width (left-right dimension in FIG. 14) of the cylindrical portion 251, and is located at the end in the width direction (left end in FIG. 14) of the cylindrical portion 251. In this embodiment, the thickness of the annular portion 252 is approximately the same as the thickness of the peripheral wall portion of the cylindrical portion 251. The slat bar support portion 150A is L-shaped by the cylindrical portion 251 and the annular portion 252 in a cross section passing through the axis of the rotor support shaft 116 of the front drum 130 (see FIG. 14). In other words, the cylindrical portion 251 and the annular portion 252 are formed to form a right-angled corner in a cross section as shown in FIG. 14.

[0109] The slat bar support portion 150A has a shape of a body of revolution with its axis coincident with the rotation center line C1 of the front drum 130. That is, the slat bar support portion 150A is provided endlessly over the entire circumferential direction of the front drum 130. In other words, the slat bar support portion 150A is provided so that the cylindrical portion 251 and the annular portion 252 form a constant L-shaped cross section over the entire circumferential direction of the front drum 130.

[0110] The slat bar support portion 150A has an open side on the opposite side (right side in FIG. 14) from the side where the annular portion 252 is arranged relative to the cylindrical portion 251, and together with the drum main body 131 forms a recess 270 which is an annular groove portion.

[0111] 15, in this embodiment, the slat bar support portion 150A is configured by an annular, integral support portion forming member 260. The support portion forming member 260 is an integral molded product such as a pressed product or a cast product.

[0112] 14 and 15 , the support portion-forming member 260 has a cylindrical peripheral wall portion 261 that forms the cylindrical portion 251, and an annular side surface portion 262 that forms the annular portion 252 and forms a right-angled corner together with the peripheral wall portion 261 in a cross-sectional view. The peripheral wall portion 261 has an outer peripheral surface that forms the outer peripheral support surface 255, an annular end face that forms the side end face 254, and an inner peripheral surface that forms the inner peripheral surface 253. The side surface portion 262 has annular surfaces that form the left and right plate faces 256 of the annular portion 252, and an inner peripheral surface 264 that is the end face on the inner peripheral side.

[0113] The support portion forming member 260 is fixed to the front drum 130 by being fixed to the drum body 131 by welding. Specifically, as shown in Fig. 14, with the inner peripheral surface 264 of the support portion forming member 260 in contact with the intermediate outer peripheral surface portion 130b of the drum body 131, the support portion forming member 260 and the drum body 131 are fixed to each other by inner peripheral welds 272 located at corners formed by the intermediate outer peripheral surface portion 130b and the left and right plate surfaces (plate surfaces 256) of the side surface portion 262 of the support portion forming member 260 in a cross-sectional view. The inner peripheral welds 272 are welded portions that are entirely or partially welded in the circumferential direction of the drum body 131.

[0114] The method for fixing the support portion-forming member 260 to the drum main body 131 and the configuration of the support portion-forming member 260 are not particularly limited. The method for fixing the support portion-forming member 260 to the front drum 130 may be, for example, a method using fasteners such as bolts. The support portion-forming member 260 may be configured such that the peripheral wall portion 261 and the side surface portion 262 are formed from separate members and these members are fixed to each other by welding or the like.

[0115] The dimensions of each part of the slat bar support part 150A are, for example, as follows: As shown in Fig. 14, the width of the slat bar support part 150A, i.e., the width dimension D2 of the outer peripheral support surface 255, is, for example, 20 mm. Furthermore, the thickness dimension T4 of the cylindrical part 251 and the thickness dimension T5 of the annular part 252 each have a value within a range of, for example, 3.0 to 3.5 mm. Note that when the support part-forming member 260 is formed from a plate material of a certain thickness by press molding or the like, the thickness dimension T4 of the cylindrical part 251 and the thickness dimension T5 of the annular part 252 will have the same value.

[0116] In this embodiment, the thickness dimension T4 of the cylindrical portion 251 and the thickness dimension T5 of the annular portion 252 are greater than the thickness dimension T3 of the peripheral wall of the drum main body 131. Note that the dimensions of each part of the slat bar support portion 150A are merely examples and are not intended to limit the dimensions of each part.

[0117] The configuration including the slat bar support portion 150A according to the present embodiment as described above provides the same effects as those of Embodiment 1. Furthermore, compared to the configuration using two members, the first member 161 and the second member 162, as in the slat bar support portion 150 of the first embodiment, the configuration including the slat bar support portion 150A according to the present embodiment allows the slat bar support portion 150A to be formed using the support portion forming member 260, which is an integrally molded product. This reduces the amount of work required for welding, for example, and allows the slat bar support portion 150A to be easily provided at low cost and through a relatively simple process.

[0118] In the slat bar support portion 150A according to this embodiment, one of the left and right sides is the open side of the recess 270, but in a configuration in which slat bar support portions 150A are arranged at two locations, left and right, the open sides of the recesses 270 of both slat bar support portions 150A may be configured so that the open side is common in the left-right direction, or may be configured so that the open sides are opposite each other, or may be configured so that the open sides face each other. In the example shown in Fig. 13, the open sides of the two left and right slat bar support portions 150A are common (the left side of the aircraft body).

[0119] [Third embodiment] A third embodiment of the present invention will be described with reference to Figures 16 and 17. Figure 17 is a cross-sectional view taken along the line XX in Figure 16. Note that Figure 16 shows a partially cutaway cross-sectional view for convenience.

[0120] As shown in Fig. 16, the slat bar support portion 150B according to this embodiment is provided so as to be inclined with respect to a direction perpendicular to the rotation center line C1 of the front drum 130. That is, the slat bar support portion 150B is a portion formed along the circumferential direction of the front drum 130, and is provided so as to be inclined so as to form a predetermined inclination angle α1 with respect to a plane perpendicular to the rotation center line C1 when viewed from the front of the front drum 130. In the example shown in Fig. 16, which is merely an example, the magnitude of the inclination angle α1 is approximately 30°.

[0121] The slat bar support portion 150B according to this embodiment has an inclined cylindrical portion 351, which is a contact portion that forms a contact surface with the slat bar 120, and an inclined annular portion 352, which is a support base that supports the inclined cylindrical portion 351 with respect to the front drum 130. The slat bar support portion 150B is provided as a portion fixed to the front drum 130, and rotates integrally with the front drum 130.

[0122] The slat bar support portion 150B has an outer peripheral support surface 355 along a cylindrical surface coaxial with the front drum 130 as a contact surface with the slat bar 120.

[0123] The inclined cylindrical portion 351 is a cylindrical portion with an outer diameter larger than those of the drum main body 131 and the cylindrical covering body 132. The outer peripheral surface of the inclined cylindrical portion 351 serves as an outer peripheral support surface 355 of the slat bar support portion 150B. The inclined cylindrical portion 351 has an inner peripheral surface 353, which is the surface opposite to the outer peripheral support surface 355, and side end surfaces 354 on both sides in the width direction of the inclined cylindrical portion 351. The side end surfaces 354 are formed as elliptical annular surfaces that are inclined relative to the rotation center line C1.

[0124] The inclined annular portion 352 is a plate-like portion whose thickness direction is inclined at an inclination angle α1 with respect to the drum axial direction, and is an elliptical annular portion whose inner diameter matches the outer diameter of the drum main body 131. The inclined annular portion 352 has plate surfaces 356 on both left and right sides.

[0125] The inclined annular portion 352 has a thickness smaller than the width of the inclined cylindrical portion 351, and is located at the center of the inclined cylindrical portion 351 in the drum axial direction. In this embodiment, the thickness of the inclined annular portion 352 is approximately the same as the thickness of the peripheral wall of the inclined cylindrical portion 351. The slat bar support portion 150B forms an inclined T-shape by the inclined cylindrical portion 351 and the inclined annular portion 352 in a cross-sectional view passing through the axis of the rotor support shaft 116 of the front drum 130 (see FIG. 16 ).

[0126] The slat bar support portion 150B is provided endlessly around the entire circumferential direction of the front drum 130. In other words, the slat bar support portion 150B is provided so as to form a T-shaped cross section with a constant inclination around the entire circumferential direction of the front drum 130 by the inclined cylindrical portion 351 and the inclined annular portion 352. The inclination of the slat bar support portion 150B with respect to a plane perpendicular to the rotation center line C1 causes the position of the T-shaped cross section in the drum axial direction to gradually change depending on the position in the circumferential direction of the front drum 130.

[0127] The slat bar support portion 150B has left and right open sides formed by the inclined cylindrical portion 351 and the inclined annular portion 352, and forms recesses 370, which are elliptical annular grooves, together with the drum body 131 on both the left and right sides.

[0128] As in the first embodiment, the slat bar support portion 150B is composed of two members: a first member which is an inclined cylindrical member forming the inclined cylindrical portion 351, and a second member which is an elliptical ring-shaped member forming the inclined annular portion 352. These members are fixed to each other by welding, and the second member is fixed to the drum main body 131 by welding. Note that the members forming the slat bar support portion 150B may be, for example, an integrally molded product as in the second embodiment.

[0129] The slat bar support portions 150B are provided at multiple locations in the direction of the rotation axis of the front drum 130. In this embodiment, the slat bar support portions 150B are provided at two locations on both the left and right sides in a symmetrical arrangement on the intermediate outer peripheral surface portion 130b. As with the first embodiment, the number and positions of the slat bar support portions 150B are not particularly limited.

[0130] The configuration including the slat bar support portion 150B according to this embodiment as described above provides the same effects as those of the first embodiment. Furthermore, the inclined arrangement of the slat bar support portion 150B makes it possible to widen the range in the drum axial direction over which the outer peripheral support surface 355 acts on the slat bar 120 as the front drum 130 rotates. This effectively reduces wear on the support portion of the slat bar 120 provided by the slat bar support portion 150B, thereby improving the durability of the conveyor 36.

[0131] Although the slat bar support portion 150B has an inclined T-shaped cross section, it may be provided as a portion having an L-shaped cross section like the slat bar support portion 150A according to the second embodiment.

[0132] [Fourth embodiment] A fourth embodiment of the present invention will be described with reference to FIG.

[0133] As shown in Fig. 18, the slat bar support portion 150C according to this embodiment is provided at an angle so as to feed the slats (crops) inward in the left-right direction of the machine body. That is, the slat bar support portion 150C is spirally shaped about the rotation center line C1 along the middle outer peripheral surface portion 130b of the drum body 131 so as to feed the slats (crops) taken into the feeder house 35 from the opening 104 (see Fig. 6) in the drum axial direction. The spiral line along the position of the slat bar support portion 150C on the middle outer peripheral surface portion 130b of the drum body 131 is a straight line in the developed view of the middle outer peripheral surface portion 130b.

[0134] The slat bar support portions 150C include a right slat bar support portion 150Ca arranged on the right side (left side in FIG. 18) of the drum body 131, and a left slat bar support portion 150Cb arranged on the left side (right side in FIG. 18) of the drum body 131. The right slat bar support portion 150Ca has a feeding action direction in the drum axial direction that is leftward (rightward in FIG. 18), and the left slat bar support portion 150Cb has a feeding action direction that is rightward (leftward in FIG. 18).

[0135] The slat bar support part 150C according to this embodiment has a spiral outer peripheral side surface part 451 which is a contact part that forms a contact surface with the slat bar 120, and a spiral support surface part 452 which is a support base that supports the outer peripheral side surface part 451 with respect to the front drum 130. The slat bar support part 150C is provided as a part fixed to the front drum 130, and rotates integrally with the front drum 130.

[0136] The slat bar support portion 150C has an outer peripheral support surface 455 along a cylindrical surface coaxial with the front drum 130 as a contact surface with the slat bar 120.

[0137] The outer peripheral side surface portion 451 is a spiral portion along a cylindrical surface whose outer diameter is larger than that of the drum main body 131 and the cylindrical covering body 132. The outer peripheral surface of the outer peripheral side surface portion 451 serves as an outer peripheral support surface 455 of the slat bar support portion 150C. The outer peripheral side surface portion 451 has an inner peripheral surface 453, which is the surface opposite to the outer peripheral support surface 455, and side end surfaces 454 on both sides in the width direction of the outer peripheral side surface portion 451.

[0138] The support surface portion 452 is a plate-shaped portion with its thickness direction aligned substantially in the drum axial direction, and is a spiral portion whose inner diameter matches the outer diameter of the drum main body 131. The support surface portion 452 has plate surfaces 456 on both left and right sides.

[0139] The support surface portion 452 has a thickness dimension smaller than the width dimension of the outer peripheral side surface portion 451, and is located at the center of the outer peripheral side surface portion 451 in the width direction. In this embodiment, the thickness of the support surface portion 452 is approximately the same as the thickness of the peripheral wall portion of the outer peripheral side surface portion 451. The slat bar support portion 150C is T-shaped by the outer peripheral side surface portion 451 and the support surface portion 452 in a cross section passing through the axis of the rotor support shaft 116 of the front drum 130.

[0140] The slat bar support portion 150C is formed in a spiral shape and has ends on both the outer and inner sides in the drum axial direction. In other words, while the slat bar support portions 150, 150A, and 150B according to the above-described embodiments are all endless, the slat bar support portion 150C according to this embodiment has ends on both sides in the drum axial direction.

[0141] The slat bar support portion 150C has an outer peripheral side surface portion 451 and a support surface portion 452, which open on both the left and right sides and form a recess 470, which is a spiral groove, together with the drum body 131 on both the left and right sides.

[0142] As in the first embodiment, the slat bar support portion 150C is made up of two members: a first member which is a spiral member forming the outer circumferential side surface portion 451, and a second member which is a spiral member forming the support surface portion 452. These members are fixed to each other by welding, and the second member is fixed to the drum main body 131 by welding. Note that the members forming the slat bar support portion 150C may be, for example, an integrally molded product as in the second embodiment.

[0143] The slat bar support portions 150C are provided at multiple locations in the direction of the rotation axis of the front drum 130. In this embodiment, the slat bar support portions 150C are provided at two locations on both the left and right sides of the intermediate outer peripheral surface portion 130b in a symmetrical arrangement. As with the first embodiment, the number and positions of the slat bar support portions 150C are not particularly limited. Furthermore, the number of spiral turns of the slat bar support portions 150C is not particularly limited.

[0144] The configuration including the slat bar support parts 150B according to this embodiment as described above provides the same effects as those of the third embodiment. Furthermore, the spiral arrangement of the slat bar support parts 150C can provide a feeding action to the stalks inward on the left and right, thereby preventing the stalks and straw from getting wrapped around or caught in the rotor support shaft 116, the left and right chains 110, etc. (see FIG. 5).

[0145] Although the slat bar support portion 150C has an inclined T-shaped cross section, it may be provided as a portion having an L-shaped cross section like the slat bar support portion 150A according to the second embodiment.

[0146] [Fifth embodiment] A fifth embodiment of the present invention will be described with reference to FIGS.

[0147] 19 and 20, the slat bar support part 150D according to this embodiment has a cylindrical part 551 which is a contact part that forms a contact surface with the slat bar 120, and left and right annular side parts 552 which are support bases that support the cylindrical part 551 with respect to the front drum 130. The slat bar support part 150D is provided as a part fixed to the front drum 130, and rotates integrally with the front drum 130.

[0148] The slat bar support portion 150D has an outer peripheral support surface 555, which is a cylindrical surface coaxial with the front drum 130, as a contact surface with the slat bar 120.

[0149] The cylindrical portion 551 is a cylindrical portion having an outer diameter larger than that of the drum main body 131 and the cylindrical covering body 132. The outer peripheral surface of the cylindrical portion 551 serves as an outer peripheral support surface 555 of the slat bar support portion 150D. The cylindrical portion 551 has a cylindrical inner peripheral surface 553.

[0150] The side surface portion 552 is a plate-like portion with its thickness oriented in the drum axial direction, and is an annular portion whose inner diameter matches the outer diameter of the drum main body 131. Each side surface portion 552 has plate surfaces 556 on both left and right sides.

[0151] The side surface portions 552 have a thickness smaller than the width of the cylindrical portion 551 (the dimension in the left-right direction in FIG. 20), and are located at both ends of the cylindrical portion 551 in the width direction. In this embodiment, the thickness of the side surface portions 552 is approximately the same as the thickness of the peripheral wall portion of the cylindrical portion 551. The slat bar support portion 150D is U-shaped by the cylindrical portion 551 and the left and right side surface portions 552 in a cross section passing through the axis of the rotor support shaft 116 of the front drum 130 (see FIG. 20). In other words, the cylindrical portion 551 and the left and right side surface portions 552 are formed so as to form right-angled corners on both the left and right sides in the cross section shown in FIG. 20.

[0152] The slat bar support portion 150D has a shape of a body of revolution with its axis coincident with the rotation center line C1 of the front drum 130. That is, the slat bar support portion 150D is provided endlessly around the entire circumferential direction of the front drum 130. In other words, the slat bar support portion 150D is provided so that the cylindrical portion 551 and the left and right side surface portions 552 form a constant U-shaped cross section around the entire circumferential direction of the front drum 130.

[0153] In this embodiment, the slat bar support portion 150D is configured by an annular, one-piece support portion-forming member 560. This support portion-forming member 560 is, for example, a one-piece molded product such as a casting. As shown in Fig. 20, the support portion-forming member 560 forming the slat bar support portion 150D has a cylindrical peripheral wall portion 561 forming the cylindrical portion 551 and annular side wall surface portions 562 forming the left and right side surface portions 552.

[0154] The support portion forming member 560 constituting the slat bar support portion 150D is fixed to the drum main body 131 by welding, and thereby fixed to the front drum 130. Specifically, as shown in Fig. 20, with the inner peripheral surfaces 564 of the left and right side wall surface portions 562 in contact with the intermediate outer peripheral surface portion 130b of the drum main body 131, the support portion forming member 560 and the drum main body 131 are fixed to each other by inner peripheral welds 572 located at corners formed by the intermediate outer peripheral surface portion 130b and the outer left and right plate surfaces (plate surfaces 556) of each side wall surface portion 562 in a cross-sectional view. The inner peripheral welds 572 are welded portions that are entirely or partially welded in the circumferential direction of the drum main body 131.

[0155] The slat bar support portion 150D forms an annular hollow portion on the outer circumferential side of the intermediate outer circumferential surface portion 130b. That is, an annular space portion 580 is formed by the intermediate outer circumferential surface portion 130b, the cylindrical portion 551, and the left and right side surface portions 552 of the slat bar support portion 150D.

[0156] The support portion forming member 560 constituting the slat bar support portion 150D may be configured, for example, such that the peripheral wall portion 561 and the left and right side wall surface portions 562 are formed from separate members, and these members are fixed together by welding or the like.

[0157] The configuration including the slat bar support portion 150D according to this embodiment as described above provides the same effects as those of Embodiment 2. Furthermore, the configuration including the slat bar support portion 150D according to this embodiment provides that the portion that supports the cylindrical portion 551 relative to the front drum 130 is formed by the side surface portions 552 on both the left and right sides, and therefore the slat bar 120 can be supported by the slat bar support portion 150D with a relatively high support strength.

[0158] [Sixth embodiment] A sixth embodiment of the present invention will be described with reference to Figures 21 and 22. Figure 22 is a partial cross-sectional view taken along the YY line in Figure 21. Note that the slat bar 120 is shown by a two-dot chain line at the YY line in Figure 21, but the slat bar 120 is shown by a solid line in Figure 22. For convenience, the slat bar 120 in a removed state is shown by a solid line in Figure 21.

[0159] 21 and 22, in this embodiment, the slat bar 120 is provided with recesses 600 as engagement portions that engage with the slat bar support portions 150E. The recesses 600 are provided in two locations on the slat bar 120, corresponding to the slat bar support portions 150E provided at two locations on the left and right of the front drum 130.

[0160] The recess 600 is a portion into which the outer peripheral edge of the slat bar support portion 150E is fitted. In the slat bar 120, which has a generally U-shaped cross section formed by the bottom surface portion 121, the front wall portion 122, and the rear wall portion 123, the recess 600 is formed as a notch having a rectangular shape in front view, with the bottom surface portion 121 side of the slat bar 120 (the inner peripheral side of the chain 110) as the open side, so as to form a space portion corresponding to the outer shape of the outer peripheral edge of the slat bar support portion 150E.

[0161] The recess 600 is formed by left and right side end faces 601 facing each other in the left-right direction, and outer peripheral end faces 602 formed on each of the front wall portion 122 and the rear wall portion 123. The side end faces 601 are generally U-shaped surfaces formed over a range spanning the entire width direction of the bottom surface portion 121 (the left-right direction in the drawing for the slat bar 120 shown in FIG. 22) and the inner peripheral portions of the front wall portion 122 and the rear wall portion 123.

[0162] In this way, the recess 600 is formed as a cutout portion of the entire bottom surface portion 121 and the inner peripheral portions of the front wall portion 122 and rear wall portion 123 in the range corresponding to each slat bar support portion 150E in the left-right direction of the slat bar 120.

[0163] In this embodiment, the recess 600 has a width dimension (left-right direction) that is approximately the same as the width dimension of the slat bar support portion 150E, more specifically, a dimension slightly larger than the width dimension of the slat bar support portion 150E. Furthermore, the recess 600 has a height dimension that is approximately half the height of each of the front wall portion 122 and the rear wall portion 123.

[0164] As described above, the slat bar support portion 150E engages with the slat bar 120 with its outer peripheral edge fitted into the recess 600 formed in the slat bar 120. In other words, the slat bar 120, which is supported on the front drum 130 by the slat bar support portion 150E, is supported by the slat bar support portion 150E with its outer peripheral edge fitted into the recess 600.

[0165] The slat bar support 150E according to this embodiment has a larger outer diameter than the slat bar support 150, 150A, etc. according to the other embodiments, since the peripheral edge is fitted into the recess 600 of the slat bar 120. Regarding the configuration of the slat bar support 150E, the basic configuration other than the relatively large outer diameter may be the same as that of the slat bar support 150, 150A, 150D according to the first, second, and fifth embodiments, as appropriate. Note that Figures 21 and 22 show an example in which the slat bar support 150E has the same configuration as the slat bar support 150 according to the first embodiment.

[0166] According to the configuration including the slat bar 120 and the slat bar support portion 150E of this embodiment as described above, the engagement of the slat bar support portion 150E with the slat bar 120 by the recess 600 can restrict left-right positional deviation of the slat bar 120. This can prevent the slat bar 120 from shifting left-right even when, for example, there is a bias in the amount of straw taken into the feeder house 35. As a result, a stable conveying action by the conveyor 36 can be obtained, and the straw conveying performance of the feeder 30 can be improved.

[0167] In this embodiment, the slat bar 120 is provided with the recess 600 as the engaging portion, but the configuration of the engaging portion is not limited to this embodiment. For example, a configuration may be used in which a recess is provided on the slat bar support portion 150E side, and a protrusion is provided on the slat bar 120 side as the engaging portion that engages with the recess of the slat bar support portion 150E.

[0168] [Seventh embodiment] A seventh embodiment of the present invention will be described with reference to FIGS.

[0169] As shown in Fig. 23, the slat bar support member 150F according to this embodiment is provided in a spiral shape so as to feed the slats in the axial direction of the drum. That is, the slat bar support member 150F is formed in a spiral shape centered on the rotation center line C1 along the middle outer peripheral surface member 130b of the drum body 131 so as to feed the slats (see Fig. 24) taken into the feeder house 35 from the opening 104 in the left-right direction of the machine body. The spiral line along the position where the slat bar support member 150F is arranged on the middle outer peripheral surface member 130b of the drum body 131 is a straight line in the developed view of the middle outer peripheral surface member 130b.

[0170] The slat bar support portion 150F is provided in a continuous spiral shape over substantially the entire range of the intermediate outer peripheral surface portion 130b in the drum axial direction, excluding both left and right ends. The slat bar support portion 150F provides a feeding action in the drum axial direction to the left (right in FIG. 23). Here, the direction of the feeding action by the slat bar support portion 150F is the direction of the feeding action obtained when the front drum 130 rotates counterclockwise in a left side view when the conveyor 36 is driven in the forward direction (see arrow A1 in FIG. 6).

[0171] The slat bar support part 150F according to this embodiment is a plate-shaped part whose thickness direction is approximately in the drum axial direction, and is a spiral part whose inner diameter matches the outer diameter of the drum main body 131. The slat bar support part 150F has a constant or approximately constant plate thickness overall. The slat bar support part 150F has plate surfaces 756 on both left and right sides. The slat bar support part 150F is provided as a part fixed to the front drum 130, and rotates integrally with the front drum 130.

[0172] The slat bar support portion 150F has an outer peripheral end surface 755 that contacts the slat bar 120 and is a cylindrical surface coaxial with the front drum 130. The outer peripheral end surface 755 is the end surface on the outer periphery of the plate-shaped slat bar support portion 150F and has a spiral shape that follows the spiral shape formed by the slat bar support portion 150F. The outer peripheral end surface 755 is a spiral surface that follows a cylindrical surface whose outer diameter is larger than that of the drum main body 131 and the cylindrical covering body 132.

[0173] The slat bar support portion 150F is formed in a spiral shape and has ends on both sides in the drum axial direction. That is, while the slat bar support portions 150, 150A, and 150B according to the above-described embodiments are all endless, the slat bar support portion 150F according to this embodiment has ends on both sides in the drum axial direction. The spiral plate member that forms the slat bar support portion 150F is fixed to the drum main body 131 by welding or the like. Note that the method of fixing the spiral plate member to the drum main body 131 is not particularly limited.

[0174] The spiral plate-like member that forms the slat bar support portion 150F is provided with a reinforcing member as appropriate to reinforce the support strength for the intermediate outer peripheral surface portion 130b. The reinforcing member is, for example, a reinforcing plate that is fixed to the spiral plate-like member that forms the slat bar support portion 150F and the intermediate outer peripheral surface portion 130b by welding or the like, and is provided at multiple locations at predetermined intervals along the spiral of the slat bar support portion 150F.

[0175] The slat bar support portion 150F has a constant or approximately constant protruding height from the intermediate outer peripheral surface portion 130b as a whole, and is provided at a constant or approximately constant pitch. In the example shown in Fig. 23, the number of turns in the spiral shape of the slat bar support portion 150F is approximately 4.5. However, the number of turns and pitch of the spiral shape of the slat bar support portion 150F are not particularly limited.

[0176] The direction of the feeding action due to the spiral shape of the slat bar support part 150F corresponds to the positioning of the feeder 30 on the left side relative to the platform 31. As shown in Fig. 24, the reaping part 3 has a platform 31 that is provided in front of the feeder 30 so as to communicate with the feeder house 35 of the feeder 30 and has a built-in raking auger 37 (see Fig. 3), and the feeder house 35 is provided at a position biased to the left side, which is one side of the machine body in the left-right direction, relative to the platform 31. In this configuration, the direction of the feeding action on the grain straw due to the spiral slat bar support part 150F is toward the left side (the right side in Fig. 24).

[0177] The spiral shape that imparts a feeding action to the stratum in a direction toward the left side is a spiral shape in which the portion of the slat bar support portion 150F located in front of the front drum 130 is inclined so that the upper side is located on the left side (the right side in FIG. 23) when viewed from the front, and the lower side is located on the right side (the left side in FIG. 23) when viewed from the front, as shown in FIG. 23. In other words, the spiral shape of the slat bar support portion 150F is inclined in the feeding direction side relative to the up-and-down direction when viewed from the front.

[0178] In this configuration, as the conveyor 36 is driven, the front drum 130 rotates counterclockwise when viewed from the left side, and the feeding action of the slat bar support portion 150F causes the grain straw sent from within the platform 31 through the opening 104 into the feeder house 35 to be sent laterally to the left.

[0179] According to the configuration including the slat bar support portion 150F of this embodiment, the spiral shape of the slat bar support portion 150F allows contact support of the slat bar 120 at multiple locations in the drum axial direction, thereby reducing the support pressure of the slat bar 120. Furthermore, the support position of the slat bar 120 can be gradually changed in the drum axial direction. These features mitigate stress concentration at the support portion of the slat bar 120, thereby reducing wear. As a result, the durability of the slat bar 120 and other components of the conveyor 36 can be improved. Furthermore, since the support portion of the slat bar 120 is increased, the support surface area can be easily secured, effectively reducing wear at the support portion of the slat bar 120, and stably supporting the slat bar 120.

[0180] Furthermore, according to the slat bar support portion 150F, the outer peripheral end surface 755, which is the support surface for the slat bars 120, is formed in a spiral shape around the entire circumference of the front drum 130, so that the support action of the slat bar support portion 150F for the multiple slat bars 120 can be made uniform, and the amount of wear at the support portion of each slat bar 120 can be made uniform. Furthermore, because the support action of the slat bar support portion 150F for the slat bars 120 against the front drum 130 is made uniform, stable transport operation of the conveyor 36 can be obtained.

[0181] Furthermore, the spiral arrangement of the slat bar support parts 150F allows the slat bar to be fed in the axial direction of the drum. This prevents the slat bar from becoming stuck by adjusting the feeding direction and amount using the spiral shape of the slat bar support parts 150F, and prevents the slat bar and straw from getting wrapped around or caught in the rotor support shaft 116, the left and right chains 110, etc. (see Figure 5).

[0182] In addition, in a configuration in which the feeder house 35 is positioned off to the left of the center relative to the platform 31, the slat bar support portion 150F is provided so that the spiral shape of the slat bar supports the stratum to the left. With this configuration, even if the amount of stratum taken into the feeder house 35 from the opening 104 differs between the left and right sides, the flow rate of stratum taken into the feeder house 35 can be made uniform.

[0183] Specifically, as shown in Figure 24, the volume of the grain stalks in the platform 31 is greater in the portion to the right of the opening 104 (see the portion indicated by the dashed ellipse V1) than in the portion to the left of the opening 104 (see the portion indicated by the dashed ellipse V2) because the portion has a longer left-right dimension. Therefore, with regard to the grain stalks taken into the feeder house 35 from inside the platform 31 through the opening 104, the amount of grain stalks taken in from the right side of the opening 104 (see arrow W1) is greater than the amount of grain stalks taken in from the left side of the opening 104 (see arrow W2), resulting in an imbalance in the flow rate of grain stalks in the feeder house 35.

[0184] Therefore, in this embodiment, the spiral winding direction of the slat bar support portion 150F is set to guide the stumps from the side with a large amount of stump intake to the side with a small amount of stump intake, i.e., from the right side to the left side. This allows the stumps to be sent from the side with a large amount of stump intake to the side with a small amount of stump intake in the left-right direction within the feeder house 35. This increases the flow rate of stumps on the side with a small amount of stump intake within the feeder house 35, thereby reducing the difference in the flow rate of stumps between the left and right sides within the feeder house 35 and making the flow rate of stumps uniform. As a result, it is possible to prevent stumps and straw dust from getting wrapped around or caught on the rotor support shaft 116 or the left and right chains 110, etc., and to achieve smooth transport of stumps from the reaping unit 3 to the threshing unit 7.

[0185] The above-described embodiment is an example of the present invention, and the present invention is not limited to the above-described embodiment. Therefore, even if it is not the above-described embodiment, various modifications are possible depending on the design, etc., as long as they do not deviate from the technical idea of ​​the present invention. Furthermore, the effects described in this disclosure are merely examples and are not limited, and other effects may also be obtained.

[0186] The present technology can be configured as follows: The configurations described below can be selected and combined as desired.

[0187] (1) A combine harvester equipped with a conveying device that conveys stalks cut in the reaping section and supplies them to the threshing section, The conveying device is a rotating body provided at the front side of the conveying device in the conveying direction; a sprocket that rotates integrally with a drive shaft provided on the rear side in the conveying direction; left and right chains wound around the rotor and the sprocket; A plurality of slat bars installed between the left and right chains; a slat bar support portion that supports the slat bar with respect to the rotating body, The slat bar support portion is a contact portion that forms a contact surface with the slat bar; a support base that supports the contact portion with respect to the rotating body; A combine harvester characterized by: (2) The slat bar support portions are provided at a plurality of locations in the direction of the rotation axis of the rotating body. The combine harvester according to (1) above. (3) The slat bar support portion has a rotating body shape with the rotation center line of the rotating body as an axis. The combine harvester according to (1) or (2) above, characterized in that: (4) The slat bar support portion is provided so as to be inclined with respect to a direction perpendicular to the rotation center line of the rotating body. The combine harvester according to (1) or (2) above, characterized in that: (5) The slat bar support portion is provided at an angle so as to provide a feeding action on the slats toward the inside of the left and right direction of the machine body. The combine harvester according to (1) or (2) above, characterized in that: (6) The slat bar is provided with an engaging portion that engages with the slat bar support portion. The combine harvester according to any one of (1) to (5) above, (7) A combine harvester equipped with a conveying device that conveys stalks cut in the reaping section and supplies them to the threshing section, The conveying device is a rotating body provided at the front side of the conveying device in the conveying direction; a sprocket that rotates integrally with a drive shaft provided on the rear side in the conveying direction; left and right chains wound around the rotor and the sprocket; A plurality of slat bars installed between the left and right chains; a slat bar support portion that supports the slat bar with respect to the rotating body, The slat bar support portion is provided in a spiral shape so as to provide a feeding action to the stalks along the axial direction of the rotor. A combine harvester characterized by: (8) The reaping unit has a grain header that is provided in front of the conveying device so as to communicate with a housing of the conveying device and that has a built-in raking auger, the housing is provided at a position offset to one side of the machine body in the left-right direction relative to the grain header, The direction of the feeding action is toward one side in the left-right direction. The combine harvester according to (7) above. [Explanation of symbols]

[0188] 1. Combine 3 Reaping part 7. Threshing Department 30 Feeder (conveyor device) 31 Platform (Grain Header) 35 Feeder House (Housing) 37 Raking Auger 38 Reaping unit input shaft (drive shaft) 110 Chain 120 Slat Bar 113 sprocket 130 Front drum (rotating body) 150 Slat bar support 151 Cylindrical part (contact part) 152 Circular ring part (support base) 600 Recess (engagement part)

Claims

1. A combine harvester equipped with a conveying device that conveys stalks cut in the reaping section and supplies them to the threshing section, The conveying device is a rotating body provided at the front side of the conveying device in the conveying direction; a sprocket that rotates integrally with a drive shaft provided on the rear side in the conveying direction; left and right chains wound around the rotor and the sprocket; A plurality of slat bars installed between the left and right chains; a slat bar support portion that supports the slat bar with respect to the rotating body, The slat bar support portion is a contact portion that forms a contact surface with the slat bar; a support base that supports the contact portion with respect to the rotating body; A combine harvester characterized by:

2. The slat bar support portions are provided at a plurality of locations in the direction of the rotation axis of the rotating body. The combine harvester according to claim 1 .

3. The slat bar support portion has a rotating body shape with the rotation center line of the rotating body as an axis. The combine harvester according to claim 1 or 2.

4. The slat bar support portion is provided so as to be inclined with respect to a direction perpendicular to the rotation center line of the rotating body. The combine harvester according to claim 1 or 2.

5. The slat bar support portion is provided at an angle so as to provide a feeding action on the slats toward the inside of the left and right direction of the machine body. The combine harvester according to claim 1 or 2.

6. The slat bar is provided with an engaging portion that engages with the slat bar support portion. The combine harvester according to claim 1 .

7. A combine harvester equipped with a conveying device that conveys stalks cut in the reaping section and supplies them to the threshing section, The conveying device is a rotating body provided at the front side of the conveying device in the conveying direction; a sprocket that rotates integrally with a drive shaft provided on the rear side in the conveying direction; left and right chains wound around the rotor and the sprocket; A plurality of slat bars installed between the left and right chains; a slat bar support portion that supports the slat bar with respect to the rotating body, The slat bar support portion is provided in a spiral shape so as to provide a feeding action to the stalks along the axial direction of the rotor. A combine harvester characterized by:

8. The reaping unit has a grain header that is provided in front of the conveying device so as to communicate with a housing of the conveying device and that has a built-in raking auger, the housing is provided at a position offset to one side of the machine body in the left-right direction relative to the grain header, The direction of the feeding action is toward one side in the left-right direction. The combine harvester according to claim 7 .

Images