harvester

Abstract

To provide a harvesting machine facilitating replacement work of a guide roller.SOLUTION: A harvesting machine comprises: a roller mounting plate 3 including a circular hole 29 opened around a rotation axis Q of an auxiliary reel frame 26 rotating around the rotation axis Q eccentric to a rotation axis P of a reel frame 23, and connected to a support frame 18 at a position facing the auxiliary reel frame 26; and a plurality of guide rollers 28 regulating a rotation axis core of the auxiliary reel frame 26. The left and right reel frames 23 are disposed between the left and right support frames 18, the auxiliary reel frame 26 is disposed between the support frame 18 and the reel frame 23 in a horizontal direction, the roller mounting plate 3 is provided between the auxiliary reel frame 26 and the reel frame 23 in the horizontal direction, and the guide rollers 28 are mounted on a surface opposite to a surface facing the reel frame 23, of the roller mounting plate 3.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a harvester equipped with a raking reel that raks in planted culms and a cutting device that cuts the planted culms that have been raked in. [Background technology]

[0002] A harvester equipped with the above-mentioned raking reel is described in, for example, Patent Document 1. This harvester includes a raking reel, which includes left and right reel frames that rotate about a rotation axis concentric with the rotation axis driven by the rotational drive, and an auxiliary reel frame that rotates about a rotation axis eccentric to the rotation axis of the reel frame. A tine support bar is attached to the rotational reel frame, and as the reel frame rotates, the tines attached to the tine support bar rak the planted stalks. The auxiliary reel frame is supported on the support frame together with the reel frame, but is attached to the support frame so that it rotates about a rotation axis eccentric to the rotation axis of the reel frame. The free end of a link portion extending integrally from the tine support bar is pivotally connected to the auxiliary reel frame. As a result, as the auxiliary reel frame rotates in unison with the reel frame, the tine support bar rotates in unison in the direction opposite to the rotation direction of the reel frame. In this structure, multiple guide rollers are attached to a roller mounting plate so that the auxiliary reel frame is supported by a circular hole opened in the auxiliary reel frame and guide rollers arranged at multiple locations along the circumferential direction of the circular hole. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2020-099228 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above harvester, the picking reel has a rotation shaft that extends in the left-right direction and is supported by support frames at both outer lateral ends. The picking reel's auxiliary reel frame, supported by guide rollers, is located between the support frames and the reel frame on the outer lateral side. In this structure, the guide rollers supporting the auxiliary reel frame protrude from roller mounting plates connected and fixed to the support frames located laterally outward of the auxiliary reel frame in the left-right direction toward circular holes in the auxiliary reel frame, supporting the auxiliary reel frame while being inscribed within the circular holes. In this type of structure, where the guide roller protrudes from the roller mounting plate located laterally outside the auxiliary reel frame toward the side that enters the circular hole and is incorporated so as to be inscribed within the circular hole, the roller mounting plate is positioned in a way that it blocks the lateral outer side of the circular hole formed in the auxiliary reel frame, and therefore the location of the guide roller is in a recessed area that is difficult to reach from the outside. Under these conditions, if it becomes necessary to replace the guide roller, it may be difficult to insert hands or tools into the very narrow gaps around the guide roller, or it may require extensive disassembly and assembly work, including the roller mounting plate of the guide roller, which may be complicated work.

[0005] The present invention aims to provide a harvester in which the guide rollers can be easily replaced. [Means for solving the problem]

[0006] The harvester of the present invention comprises: a raking reel provided with a plurality of tines for raking planted culms in a field; A cutting device that cuts the planted culms that have been raked in is provided. The raking reel is a rotating shaft whose both ends are supported by left and right support frames; left and right reel frames that rotate around a rotation axis concentric with the rotation shaft by power transmitted to the rotation shaft; an auxiliary reel frame that rotates about a rotation axis that is eccentric with respect to the rotation axis of the reel frame; a plurality of tine support bars supported by the left and right reel frames; a plurality of tines supported by the tine support bar; a link portion connecting the auxiliary reel frame and the tine support bar; a circular hole formed in the auxiliary reel frame and opening around a rotation axis of the auxiliary reel frame; a roller mounting plate connected to the support frame at a position facing the auxiliary reel frame having the circular hole formed therein; a plurality of guide rollers that are provided on the roller mounting plate at intervals along the circumferential direction of a circle centered on the rotation axis of the auxiliary reel frame, and that abut against the inner peripheral surface of the circular hole to define the rotation axis of the auxiliary reel frame, the left and right reel frames are disposed between the left and right support frames, and the auxiliary reel frame is disposed between the support frames and the reel frames in the left-right direction; the roller mounting plate is provided between the auxiliary reel frame and the reel frame in the left-right direction, The guide roller is attached to the surface of the roller mounting plate opposite to the surface facing the reel frame.

[0007] According to the present invention, a roller mounting plate having a plurality of guide rollers that abut against the inner peripheral surface of the circular hole in the auxiliary reel frame to define the rotation axis of the auxiliary reel frame is provided between the auxiliary reel frame and the reel frame in the left-right direction, and the guide rollers are attached to the surface of the roller mounting plate opposite to the surface facing the reel frame. In this way, the roller mounting plate is not positioned laterally outward of the machine body in the left-right direction from the location of the auxiliary reel frame in the direction along the axis of the rotation shaft, but is positioned closer to the center of the machine body in the left-right direction than the auxiliary reel frame.The guide rollers do not protrude from the roller mounting plate toward the center of the machine body in the left-right direction, but rather protrude laterally outward.

[0008] Therefore, when it becomes necessary to replace the guide roller, the removal work can be easily performed without being hindered by the presence of the reel frame, auxiliary reel frame, and roller mounting plate, which makes it easier to reduce the risk of spending a lot of effort and time on the removal and installation work of the guide roller.

[0009] In the present invention, it is preferable that a bulging connecting portion be integrally formed on the roller mounting plate, the bulging connecting portion protruding in the left-right direction toward the support frame beyond the mounting surface of the roller mounting plate for the guide roller.

[0010] According to this configuration, the bulging connecting portion, which protrudes in a direction closer to the support frame than the mounting surface, is integrated with the base portion, giving the roller mounting plate a three-dimensional structure and improving the strength of the entire roller mounting plate.

[0011] In the present invention, it is preferable that the guide roller is attached to the attachment surface at a position away from where the bulging connecting portion is present.

[0012] According to this configuration, the guide roller is attached at a position away from the location of the bulging connecting portion, so even if the guide roller is on the same mounting surface as the bulging connecting portion, there is little risk that the presence of the bulging connecting portion will hinder the installation and removal of the guide roller.

[0013] In the present invention, it is preferable that the protruding height of the bulging connecting portion from the mounting surface of the roller mounting plate is set to be higher than the protruding height of the cylindrical portion of the guide roller from the mounting surface.

[0014] With this configuration, even when the roller mounting plate is positioned between the auxiliary reel frames, the cylindrical portion of the guide roller can be inscribed within the circular hole of the auxiliary reel frame, and the protruding end of the bulging connecting portion can be positioned laterally outward from the auxiliary reel frame, which makes it easy to connect the roller mounting plate to the support frame at a position laterally outward from the auxiliary reel frame.

[0015] In the present invention, it is preferable that the roller mounting plate is connected to the support frame so that an attachment angle thereof about the axis of the rotation shaft can be changed.

[0016] With this configuration, the mounting angle of the roller mounting plate relative to the support frame around the axis of the rotation shaft can be appropriately changed to finely adjust the position of the rotation center of the auxiliary reel frame relative to the rotation center of the reel frame, making it easy to optimize the operating posture of the tines. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is an overall side view of a combine harvester. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 4 is a partial cross-sectional view showing the right end portion of the pick-up rail. [Figure 6] 4 is an enlarged cross-sectional view of the front view showing the mounting portion of the roller mounting plate in the take-in reel. FIG. [Figure 7] FIG. 4 is an enlarged side view showing the mounting portion of the roller mounting plate on the take-in reel. [Figure 8] FIG. 4 is a cross-sectional view showing the attachment locations of guide rollers on the roller attachment plate. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an example of an embodiment of a harvester according to the present invention will be described with reference to the drawings. Unless otherwise specified, the front-rear direction and the left-right direction in the description of this embodiment are described as follows: That is, when a harvester to which the present invention is applied is traveling for work, the forward traveling direction (see arrow F in FIG. 1) is "forward," the backward traveling direction (see arrow B in FIG. 1) is "rear," the direction corresponding to the right side of the forward posture in the front-rear direction is "right" (see arrow R in FIG. 3), and similarly the direction corresponding to the left side (see arrow L in FIG. 3) is "left."

[0019] [Overall structure] Fig. 1 shows the overall side view of a standard combine harvester, which is an example of a harvester according to the present invention. Fig. 2 shows a pre-harvesting processing unit 2 mounted on the front of the combine harvester. In this combine harvester, the pre-harvesting processing unit 2 is disposed on the front of a traveling body 1 equipped with a pair of left and right crawler traveling devices 10. A threshing device 11 and a grain recovery unit 12 are arranged side by side on the left and right sides on the traveling machine body 1. A driver's unit 13 is provided in front of the grain recovery unit 12. A driver's seat 13a provided in the driver's unit 13 is provided above an engine bonnet 15 that houses an engine 14.

[0020] A feeder 16 for transporting harvested cereal straw is connected to the front of the threshing device 11. The rear end of the feeder 16 is supported so as to be able to swing up and down around a horizontal axis (not shown) provided near the front of the threshing device 11, and the front end is connected to the rear of the pre-harvesting section 2, which has a cutting width roughly equivalent to the width of the machine body.

[0021] The pre-cutting processing section 2 has a structure in which a clipper-type cutting device 2B and an auger 2C that sends the cut crops laterally to the middle of the cutting width are installed across a pair of left and right grass dividing frames 2A. A raking reel 2D is installed above the front of the pre-harvesting section 2, which raks the planted culms rearward and pulls them up. This raking reel 2D raks the tips of the culms planted in the field rearward while the cutting device 2B harvests them, and the harvested crop is collected in the center of the left-right direction by the auger 2C. The collected crop is then handed over to the feeder 16 and sent to the threshing device 11 at the rear.

[0022] The take-in reel 2D is supported via a support bracket 18 (corresponding to a support frame) on the front portion of a pair of left and right support arms 17 that are vertically swingable about a horizontal fulcrum Pa. The support bracket 18 is fitted onto the support arm 17 so as to be slidable back and forth along the longitudinal direction, and the rotation shaft 22 of the take-in reel 2D is supported by this support bracket 18. Therefore, the take-in action position of the take-in reel 2D can be adjusted back and forth by sliding the support bracket 18 along the longitudinal direction of the support arm 17. The support bracket 18 can be slid manually, and is configured so that its position can be fixed by pin connections or the like at multiple points forward and backward in the sliding direction. Furthermore, by swinging the support arm 17 up and down using the hydraulic cylinder 19, the height of the take-up action of the take-up reel 2D can be changed.

[0023] An input pulley 21 is attached to the right end of the rotary shaft 22 of the take-in reel 2D. Driving force is transmitted from the engine 14 on the traveling machine body to the rotary shaft 22 of the take-in reel 2D via a transmission belt 20 stretched around this input pulley 21.

[0024] [Scratching reel] Next, the structure of the take-in reel 2D will be described with reference to FIGS.

[0025] The take-in reel 2D comprises a rotating shaft 22 supported at both ends by left and right support brackets 18, left and right reel frames 23 that rotate around a rotation axis P concentric with the rotating shaft 22 by power transmitted to the rotating shaft 22, an auxiliary reel frame 26 that rotates around a rotation axis Q eccentric to the rotation axis P of the reel frame 23, a plurality of tine support bars 24 supported by the left and right reel frames 23, and a plurality of tines 24a supported by the tine support bar 24.

[0026] As shown in Figures 2 to 4, the reel frame 23 is formed into a regular pentagonal shape in side view, and includes a disk-shaped central hub 23a supported so as to rotate integrally with the rotating shaft 22, five arm portions 23b extending radially from this central hub 23a, and reinforcing rods 23c installed across the tips of the arm portions 23b. The tine support bar 24 is rotatably supported at five points on the top of each arm portion 23 b of the left and right reel frames 23 , and is supported horizontally along the axial direction of the rotary shaft 22 .

[0027] The auxiliary reel frame 26 has a regular pentagonal shape in side view and includes a disk-shaped central hub 26a, five arms 26b extending radially from the central hub 26a, and a reinforcing rod 26c spanning the tips of the arms 26b. The auxiliary reel frame 26 has the same shape as the reel frame 23.

[0028] As shown in Figure 3, links 25 are integrally formed on both ends of each tine support bar 24, protruding rearward, and the free ends of the links 25 are pivotally connected to the tops of the auxiliary reel frames 26. The distance from the axis T of each tine support bar 24 to the free-end pivot point S of the link 25 is the same as the set distance L1 from the rotation axis P of the reel frame 23 to the rotation axis Q that is eccentric from the rotation axis P of the reel frame 23. The direction of an imaginary line connecting the axis T and the free-end pivot point S is the same as the direction of an imaginary line connecting the rotation axis P of the reel frame 23 to the rotation axis Q of the auxiliary reel frame 26 that is eccentric from the rotation axis P of the reel frame 23. As a result, the rotation axis P of the reel frame 23, the rotation axis Q of the auxiliary reel frame 26, the axis T of the tine support bar 24, and the free-end pivot point S of the link 25 form the fulcrums of the parallel quadruple link. Therefore, when the reel frame 23 rotates around the rotation axis P of the reel frame 23, the auxiliary reel frame 26 rotates in response around the rotation axis Q that is eccentric from the rotation axis P of the reel frame 23, causing the tine support bar 24 to rotate in a synchronous manner in the opposite direction around the axis T while revolving around the rotation axis P of the reel frame 23, so that the tine support bar 24 is always maintained in a constant rotational position.

[0029] The structure that limits the rotation of the auxiliary reel frame 26 to rotation around a rotation axis Q that is eccentric from the rotation axis P of the reel frame 23 is composed of a circular hole 29 formed in the central hub 26a of the auxiliary reel frame 26 and a guide roller 28 that is inscribed in the circular hole 29. As shown in Figures 5 and 6, the guide roller 28 is provided on a roller mounting plate 3, and the roller mounting plate 3 is detachably attached to the support bracket 18 via a plate-shaped position adjustment plate 27 that is integrally provided on the inside of the machine body of the support bracket 18.

[0030] [Roller mounting plate] As shown in Figures 5 to 8, the roller mounting plate 3 has a disk-shaped base portion 30 having a mounting surface 31 formed on one side for mounting the guide roller 28, and a bulging connecting portion 32 that protrudes beyond the mounting surface 31 in the same direction as the protruding direction of the guide roller 28. The disk-shaped base plate portion 30 has an outer diameter D1 that is slightly smaller than the inner diameter D2 of the circular hole 29 that is punched out of the central hub 26a of the auxiliary reel frame 26 so that it can be inserted into or removed from the circular hole 29.

[0031] Three guide rollers 28 are provided on the inner surface near the outer periphery of the base plate portion 30 at positions equidistant from the rotation axis Q that is eccentric from the rotation axis P of the reel frame 23 and at equal intervals in the circumferential direction of the base plate portion 30. The base plate portion 30 is also formed with an insertion hole 30a through which the maximum diameter portion of the rotary shaft 22 supported by the support bracket 18 can be inserted.

[0032] The guide roller 28 comprises a support shaft 33 welded to the base portion 30, a tubular portion 34 made of synthetic resin fitted onto the support shaft 33 so as to be rotatable relative to the support shaft 33, and a tightening nut 35 for fixing the position of the tubular portion 34 relative to the support shaft 33. The support shaft 33 is formed as a stepped bolt that is thick on the end fixed to the base plate 30 and thin on the threaded shaft portion 33a side where the clamping nut 35 is attached, and the distance h1 from the mounting surface 31 to the step portion 33b is formed slightly longer than the axial length h2 of the tubular portion 34. Therefore, even if the clamping nut 35 is tightened too much, the tightening force is regulated by the step portion 33b, so the tubular portion 34 can be prevented from being damaged or deformed by the tightening force. 6 to 8, the tightening nut 35 does not directly contact the cylindrical portion 34, but presses the retaining collar 37 against the step portion 33b, thereby preventing the cylindrical portion 34 from coming off the support shaft 33. The outer diameter of the retaining collar 37 is set to be even larger than the outer diameter of the cylindrical portion 34.

[0033] The support shaft 33 of the guide roller 28 is fixed to the inside of the outer diameter D1 of the base plate portion 30, and the fixing position is set as follows. 7, the support shaft 33 is attached to the base unit 30 with its position positioned so that the diameter of the circumscribed circle about the cylindrical portion 34 fitted around the support shaft 33 of the guide roller 28 is slightly larger than the outer diameter D1 of the base unit 30 and is the same as or nearly the same as the inner diameter D2 of the circular hole 29 formed by stamping in the central hub 26a of the auxiliary reel frame 26. By positioning the support shaft 33 in this way, the base unit 30 can be easily inserted into and removed from the circular hole 29, and because the circumscribed circle about the cylindrical portion 34 fitted around the support shaft 33 is the same as or nearly the same as the inner diameter D2 of the circular hole 29, the insertion and removal of the cylindrical portion 34 from the circumscribed circle can be performed with little rattle.

[0034] At this time, the stop collars 37 attached to each support shaft 33 are set to be larger than the outer diameter of the cylindrical portion 34, and therefore are attached in a state where part of the outer diameter thereof protrudes radially outward from the inner circumferential edge of the circular hole 29 of the center hub 26a, as shown by the imaginary line in Figure 7. When part of the stop collars 37 protrudes radially outward from the inner circumferential edge of the circular hole 29 in this way, it is easy to prevent the guide rollers 28, which are inscribed in the circular hole 29, from shifting in position from the center hub 26a. In other words, the relative movement of the guide roller 28 in the left-right direction along the rotation axis Q of the auxiliary reel frame 26 from the lateral outside toward the center, that is, from the side closer to the support bracket 18 toward the side closer to the reel frame 23, can be restricted by the abutment between the center hub 26a and the stop collar 37. As a result, for example, in the event that an external force acts on the auxiliary reel frame 26 such that it rotates at a slight angle rather than in a plane perpendicular to the rotation axis Q, or in the event that an external force is generated that moves the guide roller 28 itself relatively in the left-right direction along the rotation axis Q of the auxiliary reel frame 26, the abutment between the center hub 26a and the stop collar 37 makes it easy to keep the relative movement of the guide roller 28 with respect to the circular hole 29 restricted.

[0035] The bulging connecting portion 32 has a channel-like cross section and is welded to the base plate portion 30 with the opening of the channel-like cross section facing the base plate portion 30. In a side view, most of the bulging connecting portion 32 is welded to the base plate portion 30 so that it fits within the outer diameter D1 of the base plate portion 30, but 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 portion 30 protrudes slightly beyond the outer diameter of the base plate portion 30. However, this protruding portion is in a position that does not need to pass through the circular hole 29 that is stamped into the center hub 26a of the auxiliary reel frame 26, so it is acceptable for it to protrude slightly.

[0036] A boss insertion hole 32b into which the boss portion 18a of the support bracket 18 that pivotally supports the rotating shaft 22 can be inserted is formed in the protruding end surface 32a of this bulging connecting portion 32, at a position concentric with the insertion hole 30a of the rotating shaft 22 formed in the base portion 30. The boss insertion hole 32b is formed to have the same diameter as or approximately the same diameter as the insertion hole 30a of the rotating shaft 22 formed in the base portion 30. The rotating shaft 22 is a stepped shaft, and the insertion hole 30a of the base portion 30 supports the maximum diameter portion of the rotating shaft 22. The boss insertion hole 32b of the bulging connecting portion 32 supports the boss portion 18a of the support bracket 18, which supports the portion of the rotating shaft 22 that is formed with a diameter smaller than the maximum diameter. The outer diameter of this boss portion 18a is formed to be the same diameter as or approximately the same diameter as the maximum diameter portion of the rotating shaft 22.

[0037] The protruding height h3 of the protruding end face 32a of the bulging connecting portion 32 from the mounting surface 31 of the base portion 30 is set to be higher than the height excluding the support shaft 33 portion of the guide roller 28 attached to the mounting surface 31, i.e., higher than the axial length h2 of the tubular portion 34. Furthermore, the maximum protruding height h4 of the support shaft 33 portion of the guide roller 28 is set higher than the protruding height h3 of the protruding end face 32a of the bulging connecting portion 32 from the mounting surface 31 of the base plate portion 30. Therefore, when the tightening nut 35 attached to the threaded shaft portion 33a of the support shaft 33 is to be attached or detached in a narrow space, it is easy to operate a wrench or the like in the rotational direction at a position higher than the protruding height h3 of the bulging connecting portion 32.

[0038] A position adjustment plate 27 is provided integrally with the support bracket 18 on the inner side of the machine, i.e., on the surface facing the take-in reel 2D. A connecting hole 27a for connecting the roller mounting plate 3 is formed in this position adjustment plate 27. The connecting hole 27a is formed as a partially arc-shaped elongated hole that curves along an arc centered on the axis P of the rotary shaft 22 (see FIG. 7). A bolt insertion hole 32c is formed in the protruding end face 32a of the bulging connecting portion 32 of the roller mounting plate 3, and a weld nut 32d is provided on the back side of the protruding end face 32a where the bolt insertion hole 32c is formed. By threading a connecting bolt 36 for connection and fixing onto this weld nut 32d and tightening and fixing together with the position adjustment plate 27, the roller mounting plate 3 can be connected and fixed to the inside side of the machine body of the support bracket 18.

[0039] At this time, by changing the position of the connecting bolt 36 inserted through the connecting hole 27a of the position adjustment plate 27 within the length range of the connecting hole 27a, the relative attitude of the roller mounting plate 3 with respect to the support bracket 18 can be changed. Accordingly, the relative position of the rotation axis Q of the auxiliary reel frame 26 with respect to the rotation axis P of the reel frame 23 can be adjusted, and the swing angle of the tines 24a on the tine support bar 24 can be changed.

[0040] As shown in Figures 5 and 6, the roller mounting plate 3 configured in this manner is provided between the auxiliary reel frame 26 and the reel frame 23 in the left-right direction, and the guide roller 28 is attached to a mounting surface 31, which is the surface of the roller mounting plate 3 opposite to the surface facing the reel frame 23. Therefore, when the cylindrical portion 34 of the guide roller 28 wears and needs to be replaced, the guide roller 28 can be accessed from the side laterally outward of the auxiliary reel frame 26, which is located most laterally outward of the take-in reel 2D, and the replacement work of the cylindrical portion 34 can be easily carried out.

[0041] Furthermore, in a side view, the guide roller 28 is attached to the mounting surface 31 of the base plate portion 30 at a position that is away from the location of the bulging connecting portion 32. Therefore, the presence of the bulging connecting portion 32 can be prevented from interfering with the attachment and detachment operation of the guide roller 28.

[0042] [Another embodiment] Other embodiments will be described below. The following embodiments may be used in combination unless a contradiction arises. The scope of the present invention is not limited to the contents of these embodiments.

[0043] (1) In the above embodiment, a structure using three guide rollers 28 is illustrated, but the number of guide rollers 28 is not limited to three, and may be four or more. The other configurations may be the same as those of the above-described embodiment.

[0044] (2) In the above-described embodiment, the disk-shaped base plate portion 30 and the bulging connecting portion 32 are formed from separate plate materials, but the present invention is not necessarily limited to this structure. For example, a single plate-like body may be used as the base plate portion 30, and the plate-like body may be bent to form a step between the mounting surface 31 and the bulging connecting portion 32. The other configurations may be the same as those of the above-described embodiment.

[0045] (3) In the above-described embodiment, a structure including both the base plate portion 30 and the bulging connecting portion 32 is illustrated, but the present invention is not necessarily limited to this structure. For example, the guide roller 28 may be attached to the base plate portion 30, and instead of providing a component corresponding to the bulging connecting portion 32 on the base plate portion 30, a structure that can be connected to the base plate portion 30 may be provided on the support bracket 18 portion or the position adjustment plate 27, thereby adopting a structure that allows the guide roller 28 of the base plate portion 30 to be detached. The other configurations may be the same as those of the above-described embodiment.

[0046] (4) In the above-described embodiment, the guide roller 28 is exemplified as one in which the cylindrical portion 34 is made of a resin material, but this structure is not necessarily limited to this, and the cylindrical portion 34 may be made of an appropriate material such as a metal member. The other configurations may be the same as those of the above-described embodiment.

[0047] (5) In the above-described embodiment, the guide roller 28 has been exemplified as having a structure in which the support shaft 33 and the cylindrical portion 34 are separate bodies, but this is not necessarily limited to this structure. The support shaft 33 and the cylindrical portion 34 may be integrally formed so that both the support shaft 33 and the cylindrical portion 34 can be detached at the same time. In this case, too, the guide roller 28 is attached to the attachment surface 31, which is the surface of the roller attachment plate 3 opposite to the surface facing the reel frame 23, and can be detached from the side of the pickup reel 2D that is laterally outer than the auxiliary reel frame 26, which is located most laterally outward. The other configurations may be the same as those of the above-described embodiment. [Industrial Applicability]

[0048] The present invention can be applied not only to conventional combine harvesters but also to head-feeding combine harvesters. Furthermore, it is not limited to harvesting crops such as rice and wheat, but can also be applied to harvesters for various culm-like crops that require lifting operations using a raking reel. [Explanation of symbols]

[0049] 2B Cutting device 2D scraping reel 3 Roller mounting plate 18 Support frame 22 Rotation axis 23 Reel Frame 24 Tine support bar 24a Tyne 25 Link section 26 Auxiliary reel frame 27 Support plate 28 Guide roller 28a Guide roller 29 Circular hole 31 Mounting surface 32 Bulging connection part 34 Cylindrical part h2 Projection height h3 Projection height P rotation axis Q Rotation axis center

Claims

1. a raking reel provided with a plurality of tines for raking planted culms in a field; A cutting device that cuts the planted culms that have been raked in is provided. The raking reel is a rotating shaft whose both ends are supported by left and right support frames; left and right reel frames that rotate around a rotation axis concentric with the rotation shaft by power transmitted to the rotation shaft; an auxiliary reel frame that rotates about a rotation axis that is eccentric with respect to the rotation axis of the reel frame; a plurality of tine support bars supported by the left and right reel frames; a plurality of tines supported by the tine support bar; a link portion connecting the auxiliary reel frame and the tine support bar; a circular hole formed in the auxiliary reel frame and opening around a rotation axis of the auxiliary reel frame; a roller mounting plate connected to the support frame at a position facing the auxiliary reel frame having the circular hole formed therein; a plurality of guide rollers that are provided on the roller mounting plate at intervals along the circumferential direction of a circle centered on the rotation axis of the auxiliary reel frame, and that abut on an inner peripheral surface of the circular hole to define the rotation axis of the auxiliary reel frame, the left and right reel frames are disposed between the left and right support frames, and the auxiliary reel frame is disposed between the support frames and the reel frames in the left-right direction; the roller mounting plate is provided between the auxiliary reel frame and the reel frame in the left-right direction, A harvester in which the guide roller is attached to a surface of the roller mounting plate opposite to a surface facing the reel frame.

2. The harvester according to claim 1, wherein the roller mounting plate is integrally formed with a bulging connecting portion that protrudes in the left-right direction toward the support frame beyond the mounting surface of the roller mounting plate for the guide roller.

3. 3. The harvester according to claim 2, wherein the guide roller is attached to the attachment surface at a position away from where the bulging connecting portion is present.

4. 3. The harvester according to claim 2, wherein the height of the bulging connecting portion protruding from the mounting surface of the roller mounting plate is set to be higher than the 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 to the support frame so that an attachment angle thereof about the axis of the rotation shaft can be changed.

Images