WO2023204204A1

WO2023204204A1 - Harvester

Info

Publication number: WO2023204204A1
Application number: PCT/JP2023/015439
Authority: WO
Inventors: 小林宜泰; 一二三慶城
Original assignee: 株式会社クボタ
Priority date: 2022-04-20
Filing date: 2023-04-18
Publication date: 2023-10-26
Also published as: JP2023159712A

Abstract

This harvester comprises a roller mounting plate (3) in which is formed a circular hole (29) centered on a rotational axis (Q) of auxiliary reel frames (23) rotating about the rotational axis (Q) which is eccentric with respect to a rotational axis (P) of the reel frames (23), the roller mounting plate being connected to a support frames (18) at positions facing auxiliary reel frames (26), and a plurality of guide rollers (28) that define the rotational axis of the auxiliary reel frames (26), wherein: the left and right reel frames (23) are disposed between the left and right support frames (18), and the auxiliary reel frames (26) are disposed between the support frames (18) and the reel frames (23) in the left-right direction; the roller mounting plate (3) is provided between the auxiliary reel frames (26) and the reel frames (23) in the left-right direction; and the guide rollers (28) are attached to the surface of the roller mounting plate (3) on the side opposite from the side facing the reel frames (23).

Description

harvester

The present invention relates to a harvester equipped with a raking reel that rakes in planted grain culms, and a cutting device that reaps the raked planted grain culms.

As a harvester equipped with the above-mentioned raking reel, there is one described in Patent Document 1, for example.
In this harvester, the raking reel consists of left and right reel frames that rotate around a rotation axis that is concentric with the rotation axis that is driven to rotate, and a rotation axis that is eccentric to the rotation axis of the reel frame. It is equipped with a rotating auxiliary reel frame. A tine support bar is mounted on the reel frame that is rotationally driven, and as the reel frame rotates, the tine provided on the tine support bar performs a raking action on the planted grain culms. The auxiliary reel frame is supported by the support frame together with the reel frame. The auxiliary reel frame is attached to the support frame so as to rotate about a rotation axis that is eccentric to the rotation axis of the reel frame. A free end of a link portion integrally extending from the tine support bar is pivotally connected to the auxiliary reel frame. Thereby, as the auxiliary reel frame rotates synchronously with the reel frame, the tine support bar is configured to rotate synchronously in a direction opposite to the rotational direction of the reel frame.
In this structure, the auxiliary reel frame has a circular hole opened in the auxiliary reel frame. A plurality of guide rollers are attached to the roller mounting plate so that the auxiliary reel frame is supported by the guide rollers arranged at a plurality of locations along the circumferential direction of the circular hole.

JP2020-099228

In the scraping reel in the above-mentioned harvester, both lateral outer ends of the rotating shaft extending in the left-right direction are supported by a support frame. Of the scraping reel, an auxiliary reel frame supported by a guide roller is arranged between the reel frame and the support frame on the lateral outer side of the reel frame. In this structure, the guide roller that supports the auxiliary reel frame is inserted into a circular hole opened in the auxiliary reel frame from a roller mounting plate that is connected and fixed to a support frame located laterally outward of the auxiliary reel frame in the left-right direction. The auxiliary reel frame is supported in a state in which the auxiliary reel frame protrudes toward the circular hole and is inscribed in the circular hole.
In a structure in which the guide roller is built in such a way that it protrudes from the roller mounting plate located laterally outward of the auxiliary reel frame toward the side that protrudes into the circular hole and is inscribed in the circular hole, the auxiliary reel frame is The roller mounting plate is positioned to close the lateral outer side of a circular hole formed in the reel frame. Therefore, the location where the guide roller exists is a recessed location 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 your hand or tools into the very narrow gap around the guide roller, or , there is a risk that complicated work may be required, such as requiring extensive disassembly and reassembly work including the roller mounting plate of the guide roller.

The present invention aims to provide a harvester in which guide roller replacement work can be easily performed.

The harvester of the present invention includes:
A raking reel equipped with multiple tines for raking the planted grain culms in the field;
a cutting device for reaping the planted grain culm that has been raked,
The scraping reel is
A rotating shaft supported at both ends 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 around a rotation axis eccentric to the rotation axis of the reel frame;
a plurality of tine support bars supported by the left and right reel frames;
the 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 opened around the rotation axis of the auxiliary reel frame;
a roller mounting plate connected to the support frame at a position opposite to the auxiliary reel frame in which the circular hole is formed;
The auxiliary reel frame is 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 is in contact with the inner peripheral surface of the circular hole. a plurality of guide rollers defining the rotation axis of the
The left and right reel frames are arranged between the left and right support frames, and the auxiliary reel frame is arranged between the support frame and the reel frame 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 a surface of the roller mounting plate opposite to a surface facing the reel frame.

According to the present invention, the roller mounting plate provided with the plurality of guide rollers that come into contact with the inner peripheral surface of the circular hole of the auxiliary reel frame and define the rotational axis of the auxiliary reel frame is connected to the auxiliary reel frame in the left and right direction. It is provided between the reel frame and the reel frame. The guide roller is 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 located laterally outward of the machine body in the left-right direction (along the axis of the rotating shaft) from where the auxiliary reel frame is located, but rather is located laterally outside the machine body in the left-right direction relative to the auxiliary reel frame. It is placed on the center side. The direction in which the guide roller projects from the roller mounting plate is not from the roller mounting plate toward the center of the body in the left-right direction, but from the roller mounting plate so as to project laterally outward.

Therefore, when it becomes necessary to replace the guide roller, it becomes easier to remove the guide roller without being disturbed by the reel frame, the auxiliary reel frame, and the roller mounting plate. Therefore, it is easy to reduce the risk of spending a great deal of effort and time on attaching and detaching the guide rollers.

In the present invention, it is preferable that the roller mounting plate is integrally formed with a bulging connecting portion that protrudes in the direction closer to the support frame in the left-right direction than the mounting surface of the guide roller on the roller mounting plate. It is.

According to this configuration, the bulging connecting portion that protrudes beyond the mounting surface in the direction approaching the support frame is integrated with the base plate, so that the roller mounting plate has a three-dimensional structure. Thereby, the strength of the entire roller mounting plate can be improved.

In the present invention, it is preferable that the guide roller is attached to the mounting surface at a position away from the location where the bulging connection portion is present.

According to this configuration, the guide roller is attached at a position away from the location where the bulging connection portion is present. Therefore, even if the guide roller is provided on the same mounting surface as the bulging connection part, there is little possibility that the work of attaching and detaching the guide roller will be hindered by the presence of the bulge connection part.

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 higher than the protruding height of the cylindrical portion of the guide roller from the mounting surface. be.

According to this configuration, even if the roller mounting plate is located between the auxiliary reel frame and the reel frame, the cylindrical portion of the guide roller is inscribed in the circular hole of the auxiliary reel frame, and the bulging connection portion The projecting end of the reel can be positioned laterally outward than the auxiliary reel frame. Thereby, the roller mounting plate can be connected to the support frame at a position laterally outward from the auxiliary reel frame with good workability.

In the present invention, it is preferable that the roller mounting plate is connected so that its mounting angle with respect to the support frame around the axis of the rotating shaft can be changed.

According to this configuration, the position of the rotation center of the auxiliary reel frame with respect to the rotation center of the reel frame can be finely adjusted by appropriately changing the attachment angle of the roller attachment plate to the support frame around the axis of the rotation shaft. Therefore, it is easy to optimize the operating posture of the tines.

FIG. 2 is an overall side view of the combine harvester. It is a right view of a reaping pre-processing part. It is a top view of a scraping reel. FIG. 3 is a right side view of the scraping reel. It is a partial sectional view showing the right end part of a scraping reel. FIG. 2 is an enlarged cross-sectional view in a plan view showing a mounting portion of a roller mounting plate in the scraping reel. FIG. 3 is an enlarged side view showing a portion where a roller mounting plate is attached to the scraping reel. FIG. 3 is a cross-sectional view showing the mounting location of the guide roller on the roller mounting plate.

EMBODIMENT OF THE INVENTION Hereinafter, an example of embodiment concerning the harvester of this invention is demonstrated based on description of a drawing.
Note that the front-rear direction and left-right direction in the description of this embodiment are described as follows unless otherwise specified. In other words, when the harvester to which the present invention is applied is running for work, the forward direction of movement (see arrow F in FIG. 1) is "front", and the direction of movement to the backward direction (see arrow B in FIG. 1) is "rear". , the direction corresponding to the right side (see arrow R in Fig. 3) with respect to the forward facing posture in the front and back direction as a reference is "right", and the direction corresponding to the left side (see arrow L in Fig. 3) is "left". be.

〔overall structure〕
FIG. 1 shows an overall side view of a conventional combine harvester, which is an example of a harvester according to the present invention. FIG. 2 shows a pre-reaping treatment section 2 installed at the front of the combine harvester. In this combine harvester, a reaping pre-processing section 2 is arranged at the front of a traveling machine body 1 equipped with a pair of left and right crawler traveling devices 10.
On the traveling body 1, a threshing device 11 and a grain collecting section 12 are provided in parallel on the left and right. A driving section 13 is arranged in front of the grain collecting section 12. A driver's seat 13a provided in the driver's section 13 is provided above an engine bonnet 15 in which the engine 14 is housed.

A feeder 16 for conveying cut grain culms is connected to the front part of the threshing device 11. The rear end side of the feeder 16 is supported so as to be swingable up and down about a horizontal axis (not shown) provided near the front of the threshing device 11 . The front end side of the feeder 16 is connected to the rear part of the reaping pre-processing section 2, which has a cutting width approximately corresponding to the width of the machine body.

The reaping pre-processing section 2 has a structure in which a clipper-type cutting device 2B and an auger 2C are installed over a pair of left and right weeding frames 2A. The auger 2C feeds the cut crop horizontally to the middle of the cutting width.
A scraping reel 2D is installed above the front part of the pre-reaping processing section 2. The raking reel 2D rakes the planted grain culm backwards and pulls it up. The combine harvester uses the raking reel 2D to scrape the tip side of the grain culm planted in the field backwards while cutting it with the cutting device 2B. The cut crops are collected in the center in the left-right direction by the auger 2C. The collected crops are delivered to the feeder 16 and sent to the threshing device 11 at the rear.

The scraping reel 2D is supported on the front portions of a pair of left and right support arms 17 via a support bracket 18 (corresponding to a support frame). The pair of left and right support arms 17 are vertically swingable around a horizontal fulcrum Pa.
The support bracket 18 is externally fitted onto the support arm 17 so as to be slidable back and forth along the longitudinal direction of the support arm 17. A rotating shaft 22 of the scraping reel 2D is supported by this support bracket 18. Therefore, in the scraping reel 2D, the scraping action position 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 manually slid. The support bracket 18 is configured so that it can be fixed in position by connecting pins or the like at a plurality of locations in the front and rear of the sliding direction.
Further, by vertically swinging the support arm 17 using the hydraulic cylinder 19, the scraping action height of the scraping reel 2D can be changed.

An input pulley 21 is attached to the right end of the rotating shaft 22 of the scraping reel 2D. Driving force is transmitted from the engine 14 on the traveling machine to the rotating shaft 22 of the scraping reel 2D via the transmission belt 20 stretched around the input pulley 21.

[Scraping reel]
Next, the structure of the scraping reel 2D will be explained with reference to FIGS. 2 to 8.

The scraping reel 2D includes a rotating shaft 22, left and right reel frames 23, an auxiliary reel frame 26, a plurality of tine support bars 24, and a plurality of tines 24a. Both ends of the rotating shaft 22 are supported by left and right support brackets 18. The left and right reel frames 23 rotate around a rotation axis P concentric with the rotation shaft 22 by the power transmitted to the rotation shaft 22. The auxiliary reel frame 26 rotates around a rotation axis Q eccentric to the rotation axis P of the reel frame 23. The plurality of tine support bars 24 are supported by the left and right reel frames 23. The plurality of tines 24a are supported by the tine support bar 24.

As shown in FIGS. 2 to 4, the reel frame 23 includes a disk-shaped central hub 23a, five arm portions 23b, and a reinforcing rod 23c. The central hub 23a is supported so as to rotate together with the rotating shaft 22. Five arm portions 23b extend radially from this central hub 23a. The reinforcing rod 23c is constructed across the tips of the arm portions 23b. The reel frame 23 is formed into a regular pentagonal shape when viewed from the side.
The tine support bar 24 is rotatably supported at five locations on the top of each arm portion 23b of the left and right reel frames 23. The tine support bar 24 is supported horizontally along the axial direction of the rotating shaft 22.

The auxiliary reel frame 26 includes a disc-shaped central hub 26a, five arm portions 26b extending radially from the central hub 26a, and a reinforcing rod 26c extending between the tips of the arm portions 26b. , and is formed into a regular pentagonal shape when viewed from the side. This auxiliary reel frame 26 is formed in the same shape as the reel frame 23.

As shown in FIG. 3, a link portion 25 is integrally provided to protrude rearward from the right end of each tine support bar 24. The free end of the link portion 25 is pivotally connected to each top of the auxiliary reel frame 26. The distance from the axis T of each tine support bar 24 to the free end pivot point S of the link portion 25 is the distance from the rotation axis P of the reel frame 23 to the rotation axis Q eccentric from the rotation axis P of the reel frame 23. It matches the set distance L1 up to. Further, the direction of the imaginary line connecting the axis T and the free end pivot point S is the rotation axis P of the reel frame 23 and the rotation axis of the auxiliary reel frame 26 eccentric from the rotation axis P of the reel frame 23. It corresponds to the direction of the imaginary line connecting Q and . As a result, the rotational axis P of the reel frame 23, the rotational 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 part 25 align with the fulcrum of the parallel quadruple link. I am doing it. Therefore, when the reel frame 23 is rotated around the rotation axis P of the reel frame 23, the auxiliary reel frame 26 follows this and rotates around the rotation axis Q eccentric from the rotation axis P of the reel frame 23. do. Thereby, the tine support bar 24 rotates around the axis T of the reel frame 23 in a synchronous manner in the opposite direction while revolving around the rotation axis P of the reel frame 23. As a result, the tine support bar 24 is always maintained in a constant rotational posture.

The structure that defines the rotation of the auxiliary reel frame 26 around a rotation axis Q that is eccentric from the rotation axis P of the reel frame 23 includes a circular hole 29 formed in the central hub 26a of the auxiliary reel frame 26, and a circular hole 29 formed in the center hub 26a of the auxiliary reel frame 26. and a guide roller 28 inscribed in the circular hole 29.
The guide roller 28 is provided on the roller mounting plate 3, as shown in FIGS. 5 and 6. The roller mounting plate 3 is removably attached to the support bracket 18 via a plate-shaped position adjustment plate 27. The position adjustment plate 27 is provided inside the support bracket 18 and integrally with the support bracket 18 .

[Roller mounting plate]
As shown in FIGS. 5 to 8, the roller mounting plate 3 includes a disk-shaped base plate portion 30 and a bulging connection portion 32. As shown in FIGS. A mounting surface 31 for mounting the guide roller 28 is formed on one side of the substrate section 30. The bulging connecting portion 32 protrudes from the mounting surface 31 in the same direction as the direction in which the guide roller 28 protrudes.
The disk-shaped substrate portion 30 has an outer diameter D1 slightly smaller than an inner diameter D2 of the circular hole 29. Thereby, the base plate portion 30 can be inserted into and removed from the circular hole 29 formed by punching in the center hub 26a of the auxiliary reel frame 26.

Three guide rollers 28 are provided on the inner surface near the outer periphery of the substrate section 30. The three guide rollers 28 are arranged 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. .
Further, the substrate portion 30 is also formed 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.

The guide roller 28 includes a support shaft 33, a cylindrical portion 34 made of synthetic resin, and a tightening nut 35. The support shaft 33 is fixed to the base plate portion 30 by welding. The cylindrical portion 34 is externally fitted around the support shaft 33 so as to be relatively rotatable. The tightening nut 35 is for fixing the position of the cylindrical portion 34 with respect to the support shaft 33.
The support shaft 33 is formed as a stepped bolt that is thicker at the end fixed to the base plate 30 and thinner at the side of the screw shaft 33a to which the tightening nut 35 is attached. The support shaft 33 is formed such that 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 tightening nut 35 is strongly tightened, the tightening force is regulated by the stepped portion 33b. This can avoid the possibility that the cylindrical portion 34 will be damaged or deformed by the tightening force.
As shown in FIGS. 6 to 8, the tightening nut 35 does not directly abut the cylindrical portion 34, but by pressing the stop collar 37 against the stepped portion 33b, the tightening nut 35 removes the cylindrical portion 34 from the support shaft 33. Controls escape. The outer diameter of the stop collar 37 is set to be larger than the outer diameter of the cylindrical portion 34.

The support shaft 33 of the guide roller 28 is fixed inside the outer diameter D1 of the base plate portion 30. The fixed position of the support shaft 33 is set as follows.
That is, as shown in FIG. 7, the diameter of the circumscribed circle for the three cylindrical parts 34 fitted around the support shaft 33 of the guide roller 28 is slightly larger than the outer diameter D1 of the base plate part 30, and With the support shaft 33 positioned so that it has the same diameter or approximately the same diameter as the inner diameter D2 of the circular hole 29 punched out in the central hub 26a of the reel frame 26, the support shaft 33 is inserted into the base plate portion 30. can be attached to. By setting the position of the support shaft 33 in this manner, the board portion 30 can be easily inserted into and removed from the circular hole 29. Furthermore, since the circumscribed circle of the cylindrical portion 34 fitted onto the support shaft 33 has 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 portion 34 within the circumscribed circle can be performed without wobbling. It can be done with less.

At this time, the stop collar 37 attached to each support shaft 33 is set to be larger than the outer diameter of the cylindrical portion 34. Therefore, as shown by the imaginary line in FIG. 7, a portion of the outer edge of the stopper collar 37 protrudes radially outward from the inner circumferential edge of the circular hole 29 of the central hub 26a. If a portion of the stopper collar 37 protrudes radially outward from the inner peripheral edge of the circular hole 29, the guide roller 28 inscribed in the circular hole 29 may be displaced from the central hub 26a. easy to suppress.
In other words, the guide roller 28 relatively moves in the left-right direction along the rotation axis Q of the auxiliary reel frame 26 from the laterally outward side to the center side, that is, from the side closer to the support bracket 18 to the side closer to the reel frame 23. This can be controlled by the contact between the center hub 26a and the stopper collar 37. As a result, for example, if some external force acts on the auxiliary reel frame 26 such that the auxiliary reel frame 26 does not rotate in a plane orthogonal to the rotation axis Q but rotates at a slight angle, or when the guide roller 28 itself is When an external force occurs that causes relative movement in the left and right direction along the rotation axis Q of the guide roller 28, the contact between the center hub 26a and the stop collar 37 prevents the relative movement of the guide roller 28 with respect to the circular hole 29. Easy to keep under control.

The bulging connecting portion 32 has a channel-like cross-sectional shape. The bulging connecting portion 32 is welded and fixed to the substrate portion 30 with the opening side of its channel-shaped cross section facing the substrate portion 30. When viewed from the side, most of the bulging connecting portion 32 is welded and fixed to the substrate portion 30 within the range of the outer diameter D1 of the substrate portion 30. As shown in FIGS. 5 to 7, a part of the bulging connection part 32 that is remote from the mounting surface 31 of the base plate part 30 is slightly away from the outer diameter D1 of the base plate part 30 when viewed from the side. It is set in a protruding state. However, this protruding portion is located at a position where it is not necessary to pass through the circular hole 29 stamped and formed in the central hub 26a of the auxiliary reel frame 26. Therefore, there is no problem even if the portion protrudes from the outer diameter D1 of the substrate portion 30 to some extent.

A boss insertion hole 32b is formed in the protruding end surface 32a of the bulging connection portion 32 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 to have the same diameter or approximately the same diameter as the insertion hole 30a of the rotating shaft 22 formed in the base plate portion 30.
The rotating shaft 22 is a stepped shaft. The insertion hole 30a of the substrate 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. The boss portion 18a supports a portion formed to have a smaller diameter than the maximum diameter of the rotating shaft 22. The outer diameter of this boss portion 18a is formed to be the same diameter or approximately the same diameter as the maximum diameter portion of the rotating shaft 22.

The protruding height h3 of the protruding end surface 32a of the bulging connecting portion 32 from the mounting surface 31 of the base plate portion 30 is greater than the height of the portion of the guide roller 28 attached to the mounting surface 31 excluding the support shaft 33, that is, , is set higher than the axial length h2 of the cylindrical portion 34.
Further, the maximum protrusion height h4 of the support shaft 33 portion of the guide roller 28 is set higher than the protrusion height h3 of the protrusion end surface 32a of the bulging connecting portion 32 from the mounting surface 31 of the base plate portion 30. Therefore, even if the circumference of the tightening nut 35 attached to the helical shaft portion 33a of the support shaft 33 is narrow, when the operator attaches and detaches the tightening nut 35, the protruding height of the bulging connecting portion 32 It is easy to operate a spanner or the like in the rotational direction at a position higher than h3 (in other words, at a position outside the bulging coupling portion 32 in the left-right direction of the machine body).

A position adjustment plate 27 is provided integrally with the support bracket 18 on the inner side of the support bracket 18, that is, on the side facing the scraping reel 2D. A connecting hole 27a for connecting the roller mounting plate 3 is formed in the position adjustment plate 27. The connecting hole 27a is an arc-shaped long hole that is curved along an arc centered on the rotation axis P of the rotation shaft 22 (see FIG. 7).
A bolt insertion hole 32c is formed in the protruding end surface 32a of the bulging connection portion 32 of the roller mounting plate 3. A weld nut 32d is provided on the back side of the protruding end surface 32a in which the bolt insertion hole 32c is formed. The roller mounting plate 3 can be connected and fixed to the inside of the support bracket 18 by screwing the connection bolt 36 for connection and fixation into this weld nut 32d and tightening and fixing it together with the position adjustment plate 27. .

At this time, the relative posture of the roller mounting plate 3 with respect to the support bracket 18 is changed by changing the position of the connecting bolt 36 inserted into the connecting hole 27a of the position adjustment plate 27 within the length range of the connecting hole 27a. be able to. 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.

The roller mounting plate 3 configured in this way is provided between the auxiliary reel frame 26 and the reel frame 23 in the left-right direction, as shown in FIGS. 5 and 6. The guide roller 28 is attached to a mounting surface 31 that is a surface of the roller mounting plate 3 that is opposite to the surface that faces the reel frame 23 .
Therefore, when the cylindrical portion 34 of the guide roller 28 is worn out and needs to be replaced, the guide roller 28 is removed from the lateral outer side of the auxiliary reel frame 26, which is located at the outermost side of the scraping reel 2D. It becomes easy to access the roller 28 and perform the replacement work of the cylindrical portion 34.

Further, the guide roller 28 is attached to the mounting surface 31 of the base plate part 30 at a position away from the location where the bulging connecting part 32 is present, when viewed from the side. Therefore, the presence of the bulging connection portion 32 can prevent the operation of attaching and detaching the guide roller 28 from being hindered.

[Another embodiment]
Another embodiment will be described below. A plurality of the following embodiments may be used in combination as long as no contradiction occurs. Note that the scope of the present invention is not limited to the contents of these embodiments.

(1) In the embodiment described above, the structure in which three guide rollers 28 are used is illustrated. However, the number of guide rollers 28 is not limited to three, and may be four or more.
For other configurations, the same configuration as in the embodiment described above may be adopted.

(2) In the embodiment described above, the disk-shaped substrate portion 30 and the bulging connection portion 32 are made of separate plate materials. However, the structure is not necessarily limited to this.
For example, a single plate-like body may be employed as the substrate portion 30 and a step may be formed between the mounting surface 31 and the bulging connecting portion 32 by bending the plate-like body.
For other configurations, the same configuration as in the embodiment described above may be adopted.

(3) In the embodiment described above, a structure including both the substrate portion 30 and the bulging connection portion 32 was exemplified. However, the structure is not necessarily limited to this.
For example, the guide roller 28 may be attached to the base plate 30 and the support bracket 18 or the position adjustment plate 27 may be connected to the base plate 30 without providing a member corresponding to the bulging connection portion 32 on the base plate 30. A possible structure may be provided to allow the guide roller 28 to be attached to and detached from the substrate portion 30.
For other configurations, the same configuration as in the embodiment described above may be adopted.

(4) In the embodiment described above, the guide roller 28 is exemplified in which the cylindrical portion 34 is made of a resin material. However, the structure is not necessarily limited to this. The cylindrical portion 34 may be made of an appropriate material such as a metal member.
For other configurations, the same configuration as in the embodiment described above may be adopted.

(5) In the embodiment described above, the guide roller 28 has a structure in which the support shaft 33 and the cylindrical portion 34 are constructed separately. However, the structure is not necessarily limited to this. The support shaft 33 and the cylindrical portion 34 may be integrally configured so that both the support shaft 33 and the cylindrical portion 34 can be attached and detached at the same time. In this case as well, the guide roller 28 is attached to the mounting surface 31, which is the surface of the roller mounting plate 3 on the opposite side to the surface facing the reel frame 23, and The guide roller 28 may be installed and removed from the side laterally outward from the auxiliary reel frame 26 located laterally outwardly.
For other configurations, the same configuration as in the embodiment described above may be adopted.

The present invention is applicable not only to ordinary combine harvesters but also to self-extracting combine harvesters. Furthermore, the present invention is applicable not only to crops such as rice and wheat, but also to harvesters for various types of culm-shaped crops that require a raising operation using a raking reel.

2B Cutting device

2D Scraping reel 3 Roller mounting plate 18 Support frame 22 Rotating shaft 23 Reel frame 24 Tine support bar 24a Tine 25 Link portion 26 Auxiliary reel frame 27 Support plate 28 Guide roller 28a Guide roller 29 Circular hole 31 Mounting surface 32 Swelling Outgoing connection part 34 Cylindrical part h2 Projection height h3 Projection height P Center of rotation axis Q Center of rotation axis

Claims

A raking reel equipped with multiple tines for raking the planted grain culms in the field;
a cutting device for reaping the planted grain culm that has been raked,
The scraping reel is
A rotating shaft supported at both ends 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 around a rotation axis eccentric to the rotation axis of the reel frame;
a plurality of tine support bars supported by the left and right reel frames;
the 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 opened around the rotation axis of the auxiliary reel frame;
a roller mounting plate connected to the support frame at a position opposite to the auxiliary reel frame in which the circular hole is formed;
The auxiliary reel frame is 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 is in contact with the inner peripheral surface of the circular hole. a plurality of guide rollers defining the rotation axis of the
The left and right reel frames are arranged between the left and right support frames, and the auxiliary reel frame is arranged between the support frame and the reel frame 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 harvester, wherein 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 a direction closer to the support frame in the left-right direction than the mounting surface of the guide roller on the roller mounting plate. Machine.
The harvester according to claim 2, wherein the guide roller is attached to the mounting surface at a position away from a location where the bulging connection portion is present.
The harvester according to claim 2, wherein a protrusion height of the bulging connecting portion from the mounting surface of the roller mounting plate is set higher than a protrusion height of the cylindrical portion of the guide roller from the mounting surface. .
The harvester according to any one of claims 1 to 4, wherein the roller mounting plate is connected so as to be able to change a mounting angle with respect to the support frame around the axis of the rotating shaft.