Harvester

Abstract

The harvester has a roller mounting plate (3) connected to a support frame (18) at a position opposite to an auxiliary wheel frame (26) which is open with a circular hole (29) centered on a rotation axis (Q) of the auxiliary wheel frame (23) which rotates with a rotation axis (P) eccentric to the rotation axis (Q) of the auxiliary wheel frame (26); and a plurality of guide rollers (28) which define the rotation axis of the auxiliary wheel frame (26); the left and right wheel frames (23) are arranged between the left and right support frames (18) and the auxiliary wheel frame (26) is arranged between the support frames (18) and the wheel frames (23) in the left and right directions, the roller mounting plate (3) is arranged between the auxiliary wheel frame (26) and the wheel frame (23) in the left and right directions, and the guide rollers (28) are mounted on the side opposite to the side of the roller mounting plate (3) opposite to the wheel frame (23).

Description

harvester Technical Field

[0001] The present invention relates to a harvester having a reel for gathering upright rice stalks and a cutting device for harvesting the gathered upright rice stalks. Background Technology

[0002] As a harvester having the aforementioned reel, there is, for example, the harvester described in Patent Document 1.

[0003] In this harvester, the reel comprises: left and right wheel frames that rotate around a rotation axis concentric with the rotation axis of the driven rotation; and an auxiliary wheel frame that rotates around a rotation axis offset from the rotation axis of the wheel frames. Furthermore, a toothed support rod is mounted on the driven wheel frame, and as the wheel frame rotates, the teeth on the toothed support rod pull the planted stalks together. The auxiliary wheel frame is supported together with the wheel frame by a support frame. The auxiliary wheel frame is mounted to the support frame in a manner that allows it to rotate around a rotation axis offset from the rotation axis of the wheel frame. A free end of a connecting rod integrally extending from the toothed support rod is pivotally supported on the auxiliary wheel frame. Thus, as the auxiliary wheel frame rotates synchronously with the wheel frame, the toothed support rod rotates synchronously in the opposite direction to the rotation direction of the wheel frame.

[0004] In this structure, the auxiliary wheel frame has a circular hole that opens in the auxiliary wheel frame. A plurality of guide rollers are mounted on the roller mounting plate so that the auxiliary wheel frame is supported by a plurality of guide rollers arranged at locations along the circumference of the circular hole.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2020-099228 Summary of the Invention

[0008] The problem that the invention aims to solve

[0009] In the aforementioned harvester, the two lateral outer ends of the rotation axis of the reel in the left-right direction are supported by a support frame. Furthermore, within the reel, an auxiliary wheel frame supported by guide rollers is positioned laterally outside the wheel frame between the wheel frame and the support frame. In this structure, the guide rollers supporting the auxiliary wheel frame protrude from a roller mounting plate, which is connected and fixed to the support frame located laterally outside the auxiliary wheel frame in the left-right direction, toward a circular hole opening in the auxiliary wheel frame, supporting the auxiliary wheel frame in a state tangential to the circular hole.

[0010] In this structure, where the guide roller protrudes from the roller mounting plate located laterally outside the auxiliary wheel frame and is assembled tangentially to the circular hole, the roller mounting plate is positioned to block the lateral side of the circular hole formed in the auxiliary wheel frame. Therefore, the area containing the guide roller becomes a deep region that is difficult for a hand to reach from the outside.

[0011] Under these conditions, when it is necessary to perform tasks such as replacing the guide roller, it may be difficult to insert hands or tools into the very narrow gaps around the location of the guide roller, or it may be necessary to perform complicated tasks such as disassembly and assembly of the guide roller, including the roller mounting plate.

[0012] This invention provides a harvester that allows for easy replacement of the guide rollers.

[0013] Technical means for solving problems

[0014] The harvester of the present invention has the following features:

[0015] A reel, equipped with multiple teeth for gathering upright rice stalks in the field; and

[0016] A cutting device for harvesting the gathered upright rice stalks;

[0017] The reel has:

[0018] The rotating shaft is supported at both ends by left and right support frames;

[0019] The left and right wheel frames rotate around a center of rotation concentric with the rotation axis using the power transmitted to the rotation axis;

[0020] The auxiliary wheel frame rotates around a rotation axis that is eccentric to the rotation axis of the wheel frame;

[0021] A plurality of toothed support rods supported by the wheel frames on the left and right;

[0022] The plurality of teeth supported by the tooth support rod;

[0023] The connecting rod portion that connects the auxiliary wheel frame and the tooth support rod;

[0024] A circular hole is formed in the auxiliary wheel frame, opening around the rotation axis of the auxiliary wheel frame;

[0025] A roller mounting plate, connected to a support frame at a position opposite to the auxiliary wheel frame having the circular hole; and

[0026] A plurality of guide rollers are disposed on the roller mounting plate at circumferential intervals along a circle centered on the rotation axis of the auxiliary wheel frame, and the rotation axis of the auxiliary wheel frame is defined by abutting against the inner circumferential surface of the circular hole;

[0027] The left and right wheel frames are disposed between the left and right support frames, and the auxiliary wheel frame is disposed between the support frames and the wheel frames in the left-right direction.

[0028] The roller mounting plate is disposed in the left-right direction between the auxiliary wheel frame and the wheel frame.

[0029] The guide roller is mounted on the opposite side of the side of the roller mounting plate that is opposite to the side of the wheel frame.

[0030] According to the present invention, a roller mounting plate having a plurality of guide rollers abutting against the inner circumferential surface of a circular hole in the auxiliary wheel frame to define the rotation axis of the auxiliary wheel frame is disposed between the auxiliary wheel frame and the wheel frame in the left-right direction. Furthermore, the guide rollers are mounted on the surface of the roller mounting plate opposite to the side of the side opposite to the wheel frame.

[0031] In this way, the roller mounting plate is not located laterally outward of the machine body in the left-right direction (along the axis of rotation), but rather positioned closer to the center of the machine body than the auxiliary wheel frame. Furthermore, the guide roller protrudes laterally outward from the roller mounting plate, rather than from the left-right direction towards the center of the machine body.

[0032] Therefore, when it is necessary to replace the guide roller, the disassembly operation can be easily performed without being obstructed by the presence of the wheel frame, auxiliary wheel frame, and roller mounting plate. This reduces the likelihood of spending excessive labor and time on guide roller loading and unloading.

[0033] In this invention, preferably, a bulging connection portion is integrally formed on the roller mounting plate, the bulging connection portion protruding in the left-right direction closer to the support frame than the mounting surface of the guide roller of the roller mounting plate.

[0034] According to this structure, by integrating the protruding connecting portion, which protrudes closer to the support frame than the mounting surface, with the base plate, the roller mounting plate becomes a three-dimensional structure. This improves the overall strength of the roller mounting plate.

[0035] In this invention, preferably, the guide roller is mounted on the mounting surface at a position offset from the location of the bulging connection portion.

[0036] According to this structure, the guide roller is installed at a position offset from the location where the bulge connection is located. Therefore, even if the guide roller is set on the same mounting surface as the bulge connection, the possibility of the bulge connection hindering the loading and unloading operation of the guide roller is very small.

[0037] In this invention, preferably, the protrusion height of the bulging connecting portion protruding from the mounting surface of the roller mounting plate is set to be higher than the protrusion height of the cylindrical portion of the guide roller protruding from the mounting surface.

[0038] According to this structure, even when the roller mounting plate is positioned between the auxiliary wheel frame and the wheel frame, the cylindrical portion of the guide roller can be tangent to the circular hole of the auxiliary wheel frame, and the protruding end of the bulging connection portion can be positioned further outward than the auxiliary wheel frame. Therefore, the connection between the roller mounting plate and the support frame can be performed with good workability at a position further outward than the auxiliary wheel frame.

[0039] In this invention, preferably, the roller mounting plate is connected such that the mounting angle relative to the support frame, centered on the axis of the rotation, can be changed.

[0040] Based on this structure, the mounting angle of the roller mounting plate centered on the axis of rotation relative to the support frame can be appropriately changed, thereby enabling fine adjustment of the position of the rotation center of the auxiliary wheel frame relative to the rotation center of the wheel frame. Therefore, it is easy to optimize the operating posture of the toothed rollers. Attached Figure Description

[0041] Figure 1 is an overall side view of the combine harvester.

[0042] Figure 2 is a right-side view of the pre-harvest processing section.

[0043] Figure 3 is a top view of the reel.

[0044] Figure 4 is a right-side view of the reel.

[0045] Figure 5 is a partial cross-sectional view showing the right end of the reel.

[0046] Figure 6 is a top enlarged sectional view showing the mounting portion of the roller mounting plate in the reel.

[0047] Figure 7 is an enlarged side view showing the mounting portion of the roller mounting plate in the reel.

[0048] Figure 8 is a cross-sectional view showing the mounting portion of the guide roller in the roller mounting plate. Detailed Implementation

[0049] Hereinafter, an example of an embodiment of the harvester of the present invention will be described based on the accompanying drawings.

[0050] Furthermore, unless otherwise specified, the forward and backward directions and left and right directions in this embodiment are described as follows. That is, the forward direction of the harvester using the present invention (see arrow F in Figure 1) is "forward", the backward direction (see arrow B in Figure 1) is "reverse", the direction corresponding to the right side based on the forward posture in the forward and backward directions (see arrow R in Figure 3) is "right", and similarly, the direction corresponding to the left side (see arrow L in Figure 3) is "left".

[0051] [Overall Structure]

[0052] Figure 1 shows an example of the harvester of the present invention, namely a conventional combine harvester.

[0053] Figure 2 shows the pre-harvest treatment unit 2 mounted at the front of a combine harvester. In this combine harvester, the pre-harvest treatment unit 2 is arranged at the front of the traveling body 1, which has a pair of left and right tracked traveling devices 10.

[0054] On the vehicle body 1, the threshing device 11 and the grain recovery unit 12 are arranged in a left-right configuration. A driver's unit 13 is provided in front of the grain recovery unit 12. The driver's seat 13a of the driver's unit 13 is located above the engine hood 15 of the built-in engine 14.

[0055] A feeder 16 for conveying harvested straw is connected to the front of the threshing device 11. The rear end of the feeder 16 is supported so that it can swing up and down about a horizontal axis (not shown) located near the front of the threshing device 11. The front end of the feeder 16 is connected to the rear of the pre-harvesting section 2, which has a harvesting width approximately equivalent to the transverse width of the machine body.

[0056] The pre-harvest processing unit 2 is a structure consisting of an electric clipper-type cutting device 2B and a reeling auger 2C mounted on a pair of left and right separating frames 2A. The reeling auger 2C feeds the harvested crop laterally to the middle of the harvest width.

[0057] A reel 2D is mounted above the front of the pre-harvest processing section 2. The reel 2D pulls and lifts the planted rice stalks backward. The combine harvester uses the reel 2D to pull the tips of the rice stalks planted in the field backward while harvesting them with the cutting device 2B. The harvested crop is collected by the reel auger 2C in the center of the left-right direction. The collected crop is transferred to the feeder 16 and fed into the threshing device 11 at the rear.

[0058] The reel 2D is supported by a support bracket 18 (equivalent to a support frame) at the front of a pair of left and right support arms 17. The pair of left and right support arms 17 swing freely up and down around the lateral fulcrum Pa.

[0059] The support bracket 18 is externally fitted into the support arm 17 in a state that allows it to slide back and forth along the length direction of the support arm 17. The rotation axis 22 of the reel 2D is supported by this support bracket 18. Therefore, by sliding the support bracket 18 along the length direction of the support arm 17, the reel 2D can adjust its reeling position back and forth. The support bracket 18 can be slidably moved manually. The support bracket 18 is configured to be fixed at multiple points in the sliding direction using pin connections or similar means.

[0060] In addition, by using the hydraulic cylinder 19 to swing the support arm 17 up and down, the height of the reel 2D can be changed.

[0061] An input pulley 21 is installed at the right end of the rotating shaft 22 of the reel 2D. Driven force is transmitted from the engine 14 on the traveling body to the rotating shaft 22 of the reel 2D via the transmission belt 20 attached to the input pulley 21.

[0062] [Harvesting reel]

[0063] Next, the structure of the reel 2D will be described with reference to Figures 2 to 8.

[0064] The reel 2D has a rotating shaft 22, left and right wheel frames 23, an auxiliary wheel frame 26, a plurality of tooth support rods 24, and a plurality of teeth 24a. The two ends of the rotating shaft 22 are supported by left and right support brackets 18. The left and right wheel frames 23 rotate about a rotation axis P concentric with the rotating shaft 22, using power transmitted to the rotating shaft 22. The auxiliary wheel frame 26 rotates about a rotation axis Q eccentric to the rotation axis P of the wheel frame 23. The plurality of tooth support rods 24 are supported by the left and right wheel frames 23. The plurality of teeth 24a are supported by the tooth support rods 24.

[0065] As shown in Figures 2-4, the wheel frame 23 has a circular central hub 23a, five arms 23b, and reinforcing rods 23c. The central hub 23a is supported in a manner that rotates integrally with the rotation axis 22. The five arms 23b extend radially from the central hub 23a. The reinforcing rods 23c are mounted on the tops of the arms 23b. The wheel frame 23 is formed as a regular pentagon when viewed from the side.

[0066] The tooth support rod 24 is rotatably supported at the top of each of the five arms 23b of the left and right wheel frames 23. The tooth support rod 24 is supported horizontally along the axis of rotation 22.

[0067] The auxiliary wheel frame 26 has a circular central hub 26a, five radially extending arms 26b from the central hub 26a, and reinforcing rods 26c mounted on the tops of the arms 26b. When viewed from the side, the auxiliary wheel frame 26 is a regular pentagon. The auxiliary wheel frame 26 is formed with the same shape as the wheel frame 23.

[0068] As shown in Figure 3, a connecting rod portion 25 is integrally protruding rearward from the right end of each tooth support rod 24. The free end of this connecting rod portion 25 is pivotally connected to the top of each auxiliary wheel frame 26. The distance from the axis T of each tooth support rod 24 to the pivot support point S of the free end of the connecting rod portion 25 is the same as the set distance L1 from the rotation axis P of the wheel frame 23 to the rotation axis Q eccentric to the rotation axis P of the wheel frame 23. In addition, the direction of the imaginary line connecting the axis T and the pivot support point S is the same as the direction of the imaginary line connecting the rotation axis P of the wheel frame 23 and the rotation axis Q of the auxiliary wheel frame 26 eccentric to the rotation axis P of the wheel frame 23. As a result, the rotation axis P of the wheel frame 23, the rotation axis Q of the auxiliary wheel frame 26, the axis T of the tooth support rod 24, and the pivot support point S of the free end of the connecting rod portion 25 constitute the fulcrum of a parallel four-bar linkage. Therefore, when the wheel frame 23 rotates around its rotation axis P, the auxiliary wheel frame 26 simultaneously rotates around its rotation axis Q, which is eccentric to the rotation axis P of the wheel frame 23. Consequently, the tooth support rod 24 revolves around the rotation axis P of the wheel frame 23 while simultaneously rotating synchronously in the opposite direction around its axis T. As a result, the tooth support rod 24 is always maintained in a certain rotational posture.

[0069] The structure that defines the rotation of the auxiliary wheel frame 26 as rotating around a rotation axis Q that is eccentric to the rotation axis P of the wheel frame 23 is composed of a circular hole 29 formed in the central hub 26a of the auxiliary wheel frame 26 and a guide roller 28 tangent to the circular hole 29.

[0070] As shown in Figures 5 and 6, the guide roller 28 is disposed on the roller mounting plate 3. The roller mounting plate 3 is detachably mounted on the support bracket 18 via a plate-shaped position adjustment plate 27. The position adjustment plate 27 is integrally disposed on the inner side of the support bracket 18.

[0071] [Roller mounting plate]

[0072] As shown in Figures 5 to 8, the roller mounting plate 3 has a circular plate-shaped base plate portion 30 and a bulging connecting portion 32. A mounting surface 31 for mounting the guide roller 28 is formed on one side of the base plate portion 30. The bulging connecting portion 32 protrudes further from the mounting surface 31 in the same direction as the protrusion direction of the guide roller 28.

[0073] The outer diameter D1 of the circular plate-shaped base plate portion 30 is formed to be slightly smaller than the inner diameter D2 of the circular hole 29. As a result, the base plate portion 30 can be inserted into or removed relative to the circular hole 29 stamped in the center hub 26a of the auxiliary wheel frame 26.

[0074] Three guide rollers 28 are mounted on the inner side near the outer periphery of the base plate portion 30. The three guide rollers 28 are arranged at equal distances from the rotation axis Q, which is eccentric to the rotation axis P of the drive wheel frame 23, and are also spaced apart equally in the circumferential direction of the base plate portion 30.

[0075] In addition, the substrate portion 30 is also provided with an insertion hole 30a through which the maximum diameter portion of the rotating shaft 22 supported by the support bracket 18 can be inserted.

[0076] The guide roller 28 has a support shaft 33, a cylindrical portion 34 made of synthetic resin, and a fastening nut 35. The support shaft 33 is welded and fixed to the base plate portion 30. The cylindrical portion 34 is rotatably fitted onto the support shaft 33. The fastening nut 35 is used to fix the position of the cylindrical portion 34 relative to the support shaft 33.

[0077] The support shaft 33 is formed as a stepped bolt, thicker towards the fixed end of the base plate portion 30 and thinner towards the threaded shaft portion 33a on which the fastening nut 35 is mounted. The distance h1 from the mounting surface 31 to the stepped portion 33b is slightly longer than the axial length h2 of the cylindrical portion 34. Therefore, even if the fastening nut 35 is tightened forcefully, the tightening force is limited by the stepped portion 33b. This avoids the possibility of the cylindrical portion 34 breaking or deforming due to the tightening force.

[0078] As shown in Figures 6 to 8, the fastening nut 35 does not directly abut against the cylindrical portion 34, but rather restricts the cylindrical portion 34 from disengaging from the support shaft 33 by pressing the retaining ring 37 against the stepped portion 33b. The outer diameter of the retaining ring 37 is set to be larger than the outer diameter of the cylindrical portion 34.

[0079] The support shaft 33 of the guide roller 28 is fixed to the inner side of the outer diameter D1 of the base plate portion 30. The fixed position of the support shaft 33 is set as follows.

[0080] That is, as shown in FIG7, the support shaft 33 is mounted on the base plate 30 with the diameter of the circumscribed circle of the three cylindrical portions 34 of the support shaft 33 embedded in the guide roller 28 being slightly larger than the outer diameter D1 of the base plate 30 and positioned in a manner that is the same as or approximately the same as the inner diameter D2 of the circular hole 29 formed in the center hub 26a of the auxiliary wheel frame 26. By setting the position of the support shaft 33 in this way, the base plate 30 can be easily inserted and removed relative to the circular hole 29. In addition, by having the circumscribed circle of the cylindrical portions 34 embedded in the support shaft 33 having the same diameter or approximately the same diameter as the inner diameter D2 of the circular hole 29, the insertion and removal of the cylindrical portions 34 within the circumscribed circle can also be performed with less wobbling.

[0081] At this time, the stop rings 37 installed on each support shaft 33 are set to be larger than the outer diameter of the cylindrical portion 34. Therefore, as shown by the imaginary line in FIG7, a portion of the outer edge of the stop ring 37 extends radially outward beyond the inner periphery of the circular hole 29 of the central hub 26a. In this way, if a portion of the stop ring 37 extends radially outward beyond the inner periphery of the circular hole 29, it is easier to suppress the displacement of the guide roller 28, which is tangent to the circular hole 29, from the position of the central hub 26a.

[0082] That is, by abutting the central hub 26a against the stop ring 37, the relative movement of the guide roller 28 in the left-right direction along the rotation axis Q of the auxiliary wheel frame 26 can be restricted from the lateral outer side to the central side, that is, from the side near the support bracket 18 to the side near the wheel frame 23. Thus, for example, when the auxiliary wheel frame 26 is not rotating in a plane orthogonal to the rotation axis Q, but is rotating slightly tilted due to some external force, or when an external force is generated that causes the guide roller 28 body to move relative to the guide roller 28 in the left-right direction along the rotation axis Q of the auxiliary wheel frame 26, the abutting of the central hub 26a against the stop ring 37 can easily maintain the state in which the relative movement of the guide roller 28 relative to the circular hole 29 is restricted.

[0083] The bulging connecting portion 32 has a channel-shaped cross-section. The bulging connecting portion 32 is welded to the base plate 30 with the opening side of the channel-shaped cross-section facing the base plate 30. When viewed from the side, most of the bulging connecting portion 32 is welded to the base plate 30 within the outer diameter D1 of the base plate 30. As shown in Figures 5 to 7, a portion of the bulging connecting portion 32 that is away from the mounting surface 31 of the base plate 30 is positioned to slightly protrude from the outer diameter D1 of the base plate 30 when viewed from the side. However, this protruding portion is located at a position where it does not require stamping to form the circular hole 29 in the center hub 26a of the auxiliary wheel frame 26. Therefore, it is not a problem for this portion to slightly protrude from the outer diameter D1 of the base plate 30.

[0084] In the protruding end face 32a of the bulging connecting portion 32, a boss insertion hole 32b is formed at a position concentric with the insertion hole 30a of the rotating shaft 22 formed in the base plate portion 30. The boss portion 18a of the support bracket 18 that pivotally supports the rotating shaft 22 can be inserted into the boss insertion hole 32b. The boss insertion hole 32b is formed with a diameter that is the same as or approximately the same as the insertion hole 30a of the rotating shaft 22 formed in the base plate portion 30.

[0085] The rotating shaft 22 is a stepped shaft. The through hole 30a of the base plate portion 30 supports the maximum diameter portion of the rotating shaft 22. Furthermore, the boss insertion hole 32b of the protruding connecting portion 32 supports the boss portion 18a of the support bracket 18. The boss portion 18a supports a portion whose diameter is smaller than the maximum diameter of the rotating shaft 22. The outer diameter of this boss portion 18a is formed to be the same as or approximately the same as the maximum diameter portion of the rotating shaft 22.

[0086] The protrusion height h3 of the protruding end face 32a of the bulging connection portion 32 protruding from the mounting surface 31 of the base plate portion 30 is set to be higher than the height of the part of the guide roller 28 mounted on the mounting surface 31 other than the support shaft 33, i.e., the axial length h2 of the cylindrical portion 34.

[0087] Furthermore, the maximum protrusion height h4 of the support shaft 33 portion of the guide roller 28 is set to be higher than the protrusion height h3 of the protruding end face 32a of the bulging connection portion 32 protruding from the mounting surface 31 of the base plate portion 30. Therefore, even when the area around the fastening nut 35 mounted on the screw portion 33a of the support shaft 33 is relatively narrow, it is easy for the operator to perform operations such as rotating the wrench at a position higher than the protrusion height h3 of the bulging connection portion 32 (in other words, a position further outward in the left-right direction than the bulging connection portion 32) when loading and unloading the fastening nut 35.

[0088] On the inner side of the support bracket 18, on the side opposite to the reel 2D, a position adjustment plate 27 is integrally provided with the support bracket 18. This position adjustment plate 27 has a connecting hole 27a for connecting the roller mounting plate 3. The connecting hole 27a is an elongated arc-shaped hole curved along an arc centered on the rotation axis P of the rotation shaft 22 (see Figure 7).

[0089] A bolt insertion hole 32c is formed on the protruding end face 32a of the bulging connecting portion 32 of the roller mounting plate 3. A welding nut 32d is provided on the back side of the protruding end face 32a where the bolt insertion hole 32c is formed. By screwing the connecting bolt 36 for connection and fixing into the welding nut 32d, and fastening it together with the position adjustment plate 27, the roller mounting plate 3 can be connected and fixed to the inside of the support bracket 18.

[0090] At this time, by changing the position of the connecting bolt 36, which is inserted into the connecting hole 27a of the position adjustment plate 27, within the length range of the connecting hole 27a, the relative posture of the roller mounting plate 3 with respect to the support bracket 18 can be changed. Simultaneously, the relative position of the rotation axis Q of the auxiliary wheel frame 26 with respect to the rotation axis P of the wheel frame 23 can be adjusted, and the swing angle of the tooth 24a in the tooth support rod 24 can be changed.

[0091] As shown in Figures 5 and 6, the roller mounting plate 3 configured in this way is positioned between the auxiliary wheel frame 26 and the wheel frame 23 in the left-right direction. The guide roller 28 is mounted on the mounting surface 31, which is the side opposite to the side of the roller mounting plate 3 opposite to the side of the wheel frame 23.

[0092] Therefore, when the cylindrical portion 34 of the guide roller 28 is worn and needs to be replaced, it becomes easy to access the guide roller 28 from a position further outward than the auxiliary wheel frame 26 located at the outermost lateral side in the reel 2D to perform the replacement operation of the cylindrical portion 34.

[0093] Furthermore, when viewed from the side, the guide roller 28 is mounted on the mounting surface 31 of the base plate portion 30 at a position offset from the location where the bulge connection portion 32 is present. Therefore, the mounting and dismounting operation of the guide roller 28 can be avoided due to the presence of the bulge connection portion 32.

[0094] [Other Implementation Methods]

[0095] Other embodiments will be described below. These other embodiments can be used in combination as long as they do not contradict each other. Furthermore, the scope of this invention is not limited to these embodiments.

[0096] (1) In the above embodiment, a structure using three guide rollers 28 is illustrated. However, the number of guide rollers 28 is not limited to three, and may be a plurality of four or more.

[0097] Other structures can be the same as those described in the previous embodiments.

[0098] (2) In the above embodiment, a structure in which the circular plate-shaped substrate portion 30 and the bulging connecting portion 32 are made of different plates is illustrated. However, it is not necessarily limited to such a structure.

[0099] For example, a single plate-shaped body can be used as the base plate 30, and by bending the plate-shaped body, a step can be formed between the mounting surface 31 and the bulging connection portion 32.

[0100] Other structures can be the same as those described in the previous embodiments.

[0101] (3) In the above embodiment, a structure having both a substrate portion 30 and a bulging connecting portion 32 is illustrated. However, it is not necessarily limited to such a structure.

[0102] For example, the following structure can also be adopted: the guide roller 28 is mounted on the base plate 30, no component equivalent to the bulging connecting part 32 is provided on the base plate 30, and a structure that can be connected to the base plate 30 is provided on the support bracket 18 or the position adjustment plate 27, so that the guide roller 28 can be mounted and detached relative to the base plate 30.

[0103] Other structures can be the same as those described in the previous embodiments.

[0104] (4) In the above embodiment, the guide roller 28 is exemplified by a structure in which the cylindrical portion 34 is made of resin material. However, it is not necessarily limited to such a structure. The cylindrical portion 34 may also be made of a suitable material such as a metal component.

[0105] Other structures can be the same as those described in the previous embodiments.

[0106] (5) In the above embodiment, the guide roller 28 is exemplified by a structure in which the support shaft 33 and the cylindrical portion 34 are separately constructed. However, it is not necessarily limited to such a structure. It is also possible for the support shaft 33 and the cylindrical portion 34 to be integrally constructed, allowing both the support shaft 33 and the cylindrical portion 34 to be installed and removed at one time. In this case, the guide roller 28 is mounted on the mounting surface 31, which is the side opposite to the side of the roller mounting plate 3 that is opposite to the wheel frame 23, and the guide roller 28 can be installed and removed from the outermost lateral side of the reel 2D, which is located beyond the outermost lateral side of the auxiliary wheel frame 26.

[0107] Other structures can be the same as those described in the previous embodiments.

[0108] Industrial availability

[0109] This invention is applicable not only to conventional combine harvesters but also to self-threshing combine harvesters. Furthermore, it is not limited to crops such as rice and wheat, but can also be applied to harvesters of various stalk crops for which the lifting operation of the reel is desired.

[0110] Explanation of reference numerals in the attached figures:

[0111] 2B Cut-off Device

[0112] 2D Reel

[0113] 3-roll mounting plate

[0114] 18 Support Frames

[0115] 22 rotating axes

[0116] 23-wheel frame

[0117] 24-tooth support rod

[0118] 24a teeth

[0119] 25-link section

[0120] 26 auxiliary wheel frame

[0121] 27 support plates

[0122] 28 guide rollers

[0123] 28a guide roller

[0124] 29 round holes

[0125] 31 mounting surface

[0126] 32. Bulging connecting part; 34. Cylindrical part; h2. Protrusion height; h3. Protrusion height; P. Rotation axis; Q. Rotation axis

Claims

1. A harvester, wherein, The reel comprises: a reel with a plurality of teeth for gathering upright rice stalks in a field; and a cutting device for harvesting the gathered upright rice stalks; the reel comprises: a rotating shaft supported at both ends by left and right support frames; left and right wheel frames that rotate around a rotation axis concentric with the rotating shaft using power transmitted to the rotating shaft; an auxiliary wheel frame that rotates around a rotation axis eccentric to the rotation axis of the wheel frames; a plurality of tooth support rods supported by the left and right wheel frames; the plurality of teeth supported by the tooth support rods; a connecting rod connecting the auxiliary wheel frames and the tooth support rods; a circular hole formed in the auxiliary wheel frame and opening around the rotation axis of the auxiliary wheel frame; and a roller mounting plate connected to the support frame at a position opposite to the auxiliary wheel frame with the circular hole. A plurality of guide rollers are disposed on the roller mounting plate at circumferential intervals along a circle centered on the rotation axis of the auxiliary wheel frame, and the rotation axis of the auxiliary wheel frame is defined by abutting against the inner circumferential surface of the circular hole; the left and right wheel frames are disposed between the left and right support frames, and the auxiliary wheel frame is disposed between the support frame and the wheel frame in the left-right direction; the roller mounting plate is disposed between the auxiliary wheel frame and the wheel frame in the left-right direction; and the guide rollers are mounted on the surface of the roller mounting plate opposite to the side of the side opposite to the wheel frame.

2. The harvester according to claim 1, wherein, A bulging connection portion is integrally formed on the roller mounting plate, which protrudes further towards the support frame in the left-right direction than the mounting surface of the guide roller of the roller mounting plate.

3. The harvester according to claim 2, wherein, The guide roller is mounted on the mounting surface at a position offset from the location of the bulging connection portion.

4. The harvester according to claim 2, wherein, The protrusion height of the bulging connection portion protruding from the mounting surface of the roller mounting plate is set to be higher than the protrusion height of the cylindrical portion of the guide roller protruding from the mounting surface.

5. The harvester according to any one of claims 1 to 4, wherein, The roller mounting plate is connected in such a way that the mounting angle relative to the support frame, centered on the axis of rotation, can be changed.

Images