Agricultural machinery and soil-raising plates for agricultural machinery

Abstract

To provide an agricultural implement which can properly level a travel mark.SOLUTION: An agricultural implement 1 comprises: an implement which is located on a rear side of a travel machine body 1 to perform work; a first ridging plate 42 which is arranged on a front side of the implement and in the vicinity of a boundary of a travel mark A being formed by the travel machine body, and moves soil toward the travel mark A; and a second ridging plate 43 which is provided in the vicinity of the boundary of the travel mark A in front of the implement and on a side separated from the travel mark A relative to the first ridging plate 42, and arranged on a position whose cross direction position is overlapped with that of the first ridging plate 42 in view from a travel direction, and moves soil toward the travel mark.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] This invention relates to an agricultural working machine and a soil gathering plate for an agricultural working machine. More specifically, it relates to an agricultural working machine and a soil gathering plate for an agricultural working machine that levels the soil roughly leveled in advance by the soil gathering plate with a soil pulverizing section.

Background Art

[0002] Patent Document 1 is known as an agricultural working machine that is located behind the traveling direction of a traveling machine body and performs agricultural work. This agricultural working machine arranges a soil gathering plate corresponding to the rear wheels of the traveling machine body and removes the traveling track formed by the passage of the rear wheels of the traveling machine body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a paddy field as a farmland, as the traveling machine body advances, the traveling section of the traveling machine body passes through the soil, and a traveling track is generated by pushing the soil aside on the side of the traveling section. If the pushed soil is returned to the traveling track, the traveling track can be removed. The soil moved from the traveling track may move over a wide range depending on the configuration of the traveling section such as wheels or crawlers, the traveling speed of the traveling machine body, etc. When trying to return the soil pushed aside over a wide range to the traveling track using the agricultural working machine of Patent Document 1, it may be considered to widen the width of the soil gathering plate to cope with it. However, simply widening the soil gathering width of the soil gathering plate may conversely form a groove by the soil gathering plate, and it may not be possible to achieve the desired working result.

[0005] This invention has been made by focusing on the above problems, and an object thereof is to provide an agricultural working machine that can properly level the traveling track. [Means for solving the problem]

[0006] This invention is Work is performed at the rear of the vehicle. Equipped with a soil crushing section. Workpiece and, A first soil-moving plate is positioned in front of the work body and near the boundary of the track formed by the traveling machine, and moves soil toward the track. A second soil-piling plate is positioned near the boundary of the track in front of the workpiece, away from the track than the first soil-piling plate, and positioned such that its front-to-back position overlaps with the first soil-piling plate when viewed from the direction of travel, and moves soil toward the track. Equipped with, The first soil-piling board has a first surface located at the bottom of the soil-piling board, A second surface having a projection that extends upward from the first surface and protrudes from the outer end of the first surface in the surface direction, It is equipped with a protruding part that extends outward and moves through the soil, The outer edge formed from the lower end of the protrusion to the lower end of the second surface is formed to be recessed upward from the straight line connecting the lower outer end of the protrusion to the lower end of the second surface, and below the outer edge is a passage area through which soil can pass, Agricultural implement characterized by having, It relates to.

[0007] This invention further, The second soil-piling plate is positioned in front of the part of the work body that is not in the work area when viewed from the direction of travel, and the first soil-piling plate Front projection as seen from the front in the direction of travel Smaller than area Agricultural machinery characterized by, It relates to.

[0008] This invention further, Between the first and second soil-piling boards in the direction of travel, there is a passage path formed so that soil can pass through toward the track as viewed from the direction of travel, Agricultural implement characterized by having, It relates to.

[0009] This invention further, The first soil-piling plate has a pivot axis that allows it to rotate in a substantially horizontal direction, When the first soil pushing plate rotates around the turning axis, the front-rear position when viewed from the traveling direction overlaps with the second soil pushing plate. A farming machine characterized by relates to

[0010] This invention is located behind the traveling body and works Workpiece equipped with a soil crushing section in front of it and is arranged near the boundary of the traveling track formed by the traveling body. A first soil pushing plate that moves soil toward the traveling track, is arranged near the boundary of the traveling track in front of the working body and on the side away from the traveling track from the first soil pushing plate. It is arranged at a position where the front-rear position overlaps with the first soil pushing plate when viewed from the traveling direction. A second soil pushing plate that moves soil toward the traveling track, Equipped with, The first soil-piling board has a first surface located at the bottom of the soil-piling board, A second surface having a projection that extends upward from the first surface and protrudes from the outer end of the first surface in the surface direction, It is equipped with a protruding part that extends outward and moves through the soil, The outer edge formed from the lower end of the protrusion to the lower end of the second surface is formed to be recessed upward from the straight line connecting the lower outer end of the protrusion to the lower end of the second surface, and below the outer edge is a passage area through which soil can pass, A soil pushing plate for a farming machine, characterized by comprising relates to

[0011] This invention further locates the second soil pushing plate in front of a portion that is not in the working area of the working body when viewed from the traveling direction, and is <( Front projection as seen from the front in the direction of travel smaller than the area of the first soil pushing plate. A farming machine characterized by relates to

[0012] This invention further Between the front and rear in the traveling direction of the first soil pushing plate and the second soil pushing plate, there is a passage path formed so that soil can pass through toward the traveling track when viewed from the traveling direction, and A soil pushing plate for a farming machine, characterized by comprising relates to

[0013] This invention further The first soil pushing plate has a turning axis that can turn in a substantially horizontal direction. When the first soil-piling plate rotates around the pivot axis, its front-to-back position, as viewed from the direction of travel, coincides with that of the second soil-piling plate. A soil-raising plate for agricultural machinery, characterized by the following features It relates to. [Effects of the Invention]

[0014] The present invention can provide an agricultural implement and a soil-leveling plate for the agricultural implement that can properly level the tracks left by the vehicle. [Brief explanation of the drawing]

[0015] [Figure 1] This is a front view of an agricultural implement according to an embodiment of the present invention. The extended working body represents the entire agricultural implement in its deployed state. The first soil-piling plate is shown in a state where it is rotating under load. [Figure 2] This is a side view of an agricultural implement according to an embodiment of the present invention. The extended working body shows the entire agricultural implement in its deployed state. The first soil-piling plate is shown in a state where it is rotated under load. [Figure 3] This is a plan view of an agricultural implement according to an embodiment of the present invention. The extended working body shows the entire agricultural implement in its deployed state. The first soil-piling plate is shown in a state where it is rotated under load. [Figure 4] This is a view of the first surface of the first soil-relieving plate according to an embodiment of the present invention, as seen from the front in the direction of the slope, and is a front view of the first soil-relieving plate alone. [Figure 5] This is a side view of the first soil-piling plate according to an embodiment of the present invention, as seen from the direction of the first surface of the first soil-piling plate. [Figure 6] This is a plan view of the first soil-piling plate, which is an enlarged plan view of the first soil-piling plate according to an embodiment of this invention. The solid line shows the first soil-piling plate in a state where it is rotated under load. [Figure 7] This is a cross-sectional view of the first soil-raising plate according to an embodiment of this invention, viewed from a plane around the pivot axis. Figure 6 shows the state in which the first soil-raising plate, indicated by the solid line, is rotated under load. [Figure 8]This is a cross-sectional view of the first soil-raising plate according to an embodiment of this invention, viewed from a plane around the pivot axis. Figure 6 shows the first soil-raising plate, indicated by the dashed line, in a state where it is not under load. [Figure 9] This is a central cross-sectional view of the pivot axis to which the first soil-piling plate according to an embodiment of the present invention is attached. [Figure 10] This is a front view showing the positional relationship between the tracks of an agricultural implement according to an embodiment of this invention and the soil-piling plate. The soil-crushing section is omitted from the illustration. [Figure 11] This is a plan view of the first soil-piling plate according to an embodiment of the present invention in a state before it is subjected to a load and in a state where it is not overlapping with the second soil-piling plate. [Figure 12] This is a front view of the first soil-piling plate according to an embodiment of the present invention, in a state before it is subjected to a load and in a state where it is not overlapping with the second soil-piling plate. [Figure 13] This is a plan view of the first soil-piling plate according to an embodiment of the present invention in a state where it is under load and overlapped with the second soil-piling plate. [Figure 14] This is a front view of the first soil-piling plate according to an embodiment of the present invention in a state where it is under load and overlapping with the second soil-piling plate. [Figure 15] This is a plan view of an embodiment of the present invention, showing the state before the first soil-piling plate is subjected to a load, and in which it is superimposed with the second soil-piling plate, with the mounting position changed. [Figure 16] This is a plan view of an embodiment of the present invention, showing the state before the first soil-piling plate is subjected to a load, and in which it is superimposed with the second soil-piling plate, with the mounting position changed. [Figure 17] This is a plan view of an embodiment of the present invention, showing the first soil-piling plate under load and overlapping with the second soil-piling plate, with the mounting position changed. [Figure 18] This is a front view of an embodiment of the present invention, showing the first soil-piling plate under load and overlapping with the second soil-piling plate, with the mounting position changed. [Modes for carrying out the invention]

[0016] A farming machine 1 according to the first embodiment of this invention will be described with reference to the drawings. An overview of embodiments of this invention will be described below. In this embodiment of the invention, the agricultural implement 1 used for puddling work in a paddy field is equipped with soil-piling plates consisting of a first soil-piling plate 42, a second soil-piling plate 43, and a third soil-piling plate 44. The agricultural implement 1 is positioned behind the tractor or other vehicle, and breaks up soil clumps using the soil-breaking section 3 shown in Figures 1 and 2. A leveling section consisting of a leveling body 5 is positioned behind the soil-breaking section 3 to level the soil. A soil-piling plate, shown in Figures 1 and 2, is positioned in front of the soil-breaking section 3.

[0017] As shown in Figure 3, the soil-raising plates (first soil-raising plate 42, second soil-raising plate 43, third soil-raising plate 44) are positioned in a plan view from the boundary of the track A (rut) formed by the traveling machine to the outside. In a plan view, the soil-raising plates are tilted backward as they approach track A, and the soil that collides with the soil-raising plates as the machine moves is moved toward track A. This movement of soil allows the soil to be roughly leveled in the soil-crushing section 3 before crushing, enabling more precise soil crushing and subsequent leveling.

[0018] In this application, the term "track A" refers to a rut formed in a concave shape in the direction of travel by compacting the soil with the running part of the vehicle, or a rut formed in a concave shape in the direction of travel by pushing away the soil with the running part of the vehicle. The boundary refers to the widthwise boundary between the track A formed by the vehicle and the area that does not have a track A, where the direction of travel intersects. The inner side of track A refers to the side that faces the center of the concave rut, while the outer side of track A refers to the side that moves away from the rut in the width direction intersecting the direction of travel, and is the part that is different from the rut. The soil mentioned in the example is soil that contains a large amount of moisture and is also called mud.

[0019] Track A is formed by the passage of the vehicle. The soil that was originally in the area of ​​track A remains in a denser state as it moves, integrating with the soil already present in the area next to the newly formed track A. Other parts of the moving soil are pushed upward by the already existing soil, and may rise above the soil reference surface. This raised soil forms embankment E. As shown in Figure 10, the shape of embankment E1 and track A formed by this vehicle varies depending on the configuration of the vehicle's running parts, such as wheels and tracks, and the vehicle's speed. The reference surface referred to in this explanation is a hypothetical horizontal plane that represents the average height of an uneven soil surface, or the water surface that appears in soil containing a large amount of moisture. F, as shown in Figures 6, 11, 13, 15, and 16, represents the path of soil passage. B, as shown in Figure 6, represents the soil flow. Soil flow B is formed by a forward-moving soil-hedging plate (for example, the second soil-hedging plate 43 as illustrated in Figure 6) capturing soil moving relatively from the front of the plate and forcibly changing the direction of soil movement. Soil flow B consists of soil flow that is captured at the front of the soil-hedging plate and forcibly changed direction at the front surface of the soil-hedging plate, and soil flow formed by soil that passes through the soil-hedging plate without being captured at the front surface. The latter soil flow may form a path that wraps around to the rear surface of the soil-hedging plate. The path formed by this soil path is called the passage path F.

[0020] Let's explain the embankment E (E1, E2). For example, when a vehicle passes at high speed, the embankment E will scatter over a wide area, albeit at a low height, in the left and right directions relative to the direction of travel from the track A. Conversely, when a vehicle passes at low speed, the area over which the embankment E scatters will be smaller, but the height may be higher. Also, in low-clay soil, embankment E is less likely to be generated because it flows on its own, but in high-clay soil, there is a tendency for tall and large embankments E to be generated. The soil-raising plates of the present invention (first soil-raising plate 42, second soil-raising plate 43, third soil-raising plate 44) can properly level the track A and embankment E generated in such diverse soil conditions, thereby improving the accuracy of subsequent processes such as soil crushing and leveling. Embankment E may be formed by the passage of a moving vehicle, or it may already be formed as a raised area before the vehicle passes. Embankment E consists of embankment E1 formed by the passage of a moving vehicle and embankment E2 that was already formed as a raised area. The embankment E described here includes at least one of embankment E1 and embankment E2, and may include both.

[0021] Item 1 is an agricultural implement. 11 is the central working unit. The central working unit 11 is located in the center of the agricultural implement 1 and performs the puddling operation. 11L is the left extension work unit. The left extension work unit 11L is located to the left of the central work unit 11 in the direction of travel and is foldably attached to the central work unit 11 to perform puddling work. 11R is the right extension work unit. The right extension work unit 11R is located to the right of the central work unit 11 in the direction of travel and can be folded together with the central work unit 11 to perform puddling work.

[0022] 2 is the frame. Frame 2 has a pipe frame 22. The pipe frame 22 is the frame that forms the skeleton of the agricultural machine 1 and has a longitudinal direction in the left-right direction relative to the direction of travel. 20 is the mounting section. 201 is the top link pin. 202 is the lower link pin. The mounting section 20 has the top link pin 201 and the lower link pin 202. The mounting section 20 is then attached to the tractor that tows the agricultural implement 1.

[0023] 21 is the input case, and 211 is the input shaft. The input shaft 211 is attached to the input case 21 and connected to the tractor's PTO shaft to extract the tractor's driving force. The input case 21 is positioned in the center of the pipe frame 22 in the longitudinal direction. 212 is the topmast. The topmast 212 is mounted on the pipe frame 22. The topmast 212 has a top link pin 201 at its tip. 213 is the lower plate. The lower plate 213 is attached to the pipe frame 22. The lower link pin 202 is attached to the tip of the lower plate 213. 23 is a transmission case. The transmission case 23 is installed at the end of the pipe frame 22 and receives the driving force from the input shaft 211 installed in the input case 21 and outputs it to the soil crushing section 3, which will be described later.

[0024] 24 is a support frame. The support frame 24 is located at both ends of the pipe frame 22, symmetrically with respect to the input case 21, and holds the rotor shaft 31, which will be described later, below the pipe frame 22. The transmission case 23 is located close to either the left or right support frame 24, and in this embodiment, it is attached to the support frame 24 on the left side in the direction of travel. 25 is a pivot point. The pivot points 25 are provided at both ends of the pipe frame 22 and are the folding and rotating pivot points for the left extension work body 11L and the right extension work body 11R. A left pivot frame 41L, which protrudes upward from the left cover body 4L provided on the left extension work body 11L, is rotatably connected to one pivot point 25, and a right pivot frame 41R, which protrudes upward from the right cover body 4R provided on the right extension work body 11R, is rotatably connected to the other pivot point 25.

[0025] Section 3 is the soil crushing section. The soil crushing section 3 is located at the rear of the traveling machine and crushes the soil by rotating. The soil-crushing unit 3 is located below the frame 2 and is rotatable, and is used to crush the soil in the field. The soil-crushing unit 3 is installed on an agricultural implement 1 that is mounted on the rear of a traveling machine such as a tractor, and is located at the rear of the traveling machine. As the traveling machine such as a tractor moves forward, the tilling tines 32 of the soil-crushing unit 3 are rotated to crush the soil. 3L is the left extension soil crushing section. The left extension soil crushing section 3L is rotatably attached to the left extension work unit 11L on the left side in the direction of travel of the soil crushing section 3, and can be folded together with the left extension work unit 11L. 3R is the right extension soil crushing section. The right extension soil crushing section 3R is rotatably attached to the right extension work unit 11R on the right side in the direction of travel of the soil crushing section 3, and can be folded together with the right extension work unit 11R.

[0026] 31 is the rotor shaft. The rotor shaft 31 is a rotating shaft that spans the lower parts of the transmission case 23 and the support frame 24, and rotates due to the driving force from the transmission case 23. 31L is the left extension rotor shaft. The left extension rotor shaft 31L is located on the left side of the rotor shaft 31 in the direction of travel. 31R is the right extension rotor shaft. The right extension rotor shaft 31R is located on the right side of the rotor shaft 31 in the direction of travel. The left extension rotor shaft 31L and the right extension rotor shaft 31R are connected to the rotor shaft 31 and rotate by the driving force from the transmission case 23.

[0027] 32 is a tilling tine. Multiple tilling tines 32 are mounted around the rotor shaft 31 and the left extension rotor shaft 31L and the right extension rotor shaft 31R, respectively, and are driven by the rotation of the rotor shaft 31 and the left extension rotor shaft 31L and the right extension rotor shaft 31R to till the field. 33 is a dog clutch. The dog clutch 33 is provided near the transmission case 23 and the support frame 24 at both ends of the soil crushing section 3. The dog clutch switches the rotational drive of the rotor shaft 31 and the left extension rotor shaft 31L and the right extension rotor shaft 31R on and off.

[0028] 4 is a cover body. Cover body 4 covers the upper part of the soil crushing section 3. 4L is the left cover body. 4R is the right cover body. Left cover body 4L covers the upper part of the left extension soil crushing section 3L. Cover body right 4R covers the upper part of extension soil crushing section right 3R. Cover body 4, cover body left 4L, and cover body right 4R prevent soil crushed or tilled by soil crushing section 3, extension soil crushing section left 3L, and extension soil crushing section right 3R from scattering to the surrounding area. 41L is the left pivot frame. The left pivot frame 41L is a member that protrudes from the upper part of the left cover body 4L for rotatably attaching the left extension work body 11L of the agricultural implement 1 to the pivot part 25, and is an arm that is integrated with the left cover body 4L. 41R is the right pivot frame. The right pivot frame 41R is a member that protrudes from the upper part of the left cover body 4R for rotatably attaching the right extension work body 11R of the agricultural implement 1 to the pivot part 25, and is an arm that is integrated with the right cover body 4R.

[0029] Let me explain about soil-piling boards. The soil-piling plates, consisting of a first soil-piling plate 42, a second soil-piling plate 43, and a third soil-piling plate 44, are installed on an agricultural machine 1 that is located at the rear of the traveling machine and performs agricultural work. They are positioned to the side of the track A formed by the moving traveling machine and move the soil inward toward the inside of the track A. In this embodiment, soil-raising plates (first soil-raising plate 42, second soil-raising plate 43, third soil-raising plate 44) are positioned in front of the soil-raising section 3, which is located at the rear of the traveling machine and is rotated to pulverize the soil.

[0030] The first soil-piling plate 42 is located in front of the soil-crushing section 3 and below the cover body 4. The surface positioned on one side of the width of a single rut formed in the field by the traveling agricultural implement 1 is inclined towards the rear as it moves inward relative to the width of the machine. The first soil-raising plate 42 is installed in front of both ends of the soil-crushing section 3 of the central working body 11 of the agricultural implement 1. In this embodiment, the first soil-raising plate 42 is installed in two locations on the agricultural implement 1 so as to correspond to each of the two tracks A that are formed side by side on the left and right at the rear of the machine body. More specifically, the first soil-raising plate 42 is positioned near the left boundary of the left track A, which is one of the tracks, and near the right boundary of the right track A, which is the other track. The first soil-piling plate 42 is positioned slightly inward from the support frame 24 in the front view shown in Figure 1 and the plan view shown in Figure 3.

[0031] The first soil-piling plate 42 comprises a first surface 421 located at the bottom of the first soil-piling plate 42, and a second surface 422 located at the top of the first soil-piling plate 42, which forms a continuous surface upward from the first surface 421 and has a projection 423 that protrudes from the outer end of the first surface 421 in the surface direction. The projection 423 located at the side end of the first soil-piling plate 42 is positioned facing outward, rather than inward, with respect to the track A. Surface 421 is primarily positioned and set up buried in the soil. Surface 422 is primarily positioned and set up protruding above the soil surface (reference surface). This applies equally to dry fields and muddy fields. In a plan view, the first soil-piling plate 42 is positioned so that it is tilted backward as it approaches the track A. This causes the soil moving from the front relative to the track A to move along the front surfaces of the first surface 421 and the second surface 422 of the first soil-piling plate 42, from the outside to the inside of the track A.

[0032] When the first surface 421 is buried in the soil, as it moves forward within the soil, if it collides with soil moving relatively from the front, it moves the soil along the front surface 421 toward the track A. The second surface 422 is formed above the first surface 421, continuing from it. At least the upper part of the second surface 422 protrudes upward from the soil surface (reference plane). Here, the soil surface (reference plane) is a hypothetical horizontal plane that represents the average height of the water surface or uneven soil surface of the mud, and the reference plane shown in this embodiment is explained assuming it is the water surface. As the second surface 422 moves forward, it moves the soil above the reference plane that is moving relatively from the front along the second surface 422, from the outside to the inside of the track A.

[0033] In this embodiment of the invention, the second surface 422 is provided such that its upper part is slightly inclined forward relative to the first surface 421 (towards the tires, which are the running part of the vehicle), as shown in Figure 5. In this way, even if the soil moving along the first surface 421 moves upward, it is prevented from moving backward over the top of the first soil-piling plate 42 by falling in front of the second surface 422. The soil is then directed along the second surface 422 toward the track A, or, while the soil is moving along the second surface 422 toward the track A, it is caused to fall in front of the first soil-piling plate 42 due to the forward inclination of the upper part of the second surface 422. The fallen soil is then buried in the ground, and the first surface 421 moves the soil toward the track A again. If the second surface 422 is a vertical surface that is an extension of the first surface 421, the soil that rises towards the top of the second surface 422 is further pushed up by the soil rising from the first surface 421. When the soil located at the top of the second surface 422 reaches a position higher than the top of the second surface 422, it falls to the rear side of the second surface 422. In other words, the soil that should have been captured by the first soil-piling plate 42 cannot efficiently move towards the track A. Due to the forward slope of the upper part of the second surface 422, the soil can rise towards the second surface 422, then fall in front of the first surface 421, move along the first surface 421 towards track A, and then rise again towards the second surface 422, repeating this process as it moves towards track A. While loose, granular soil generally does not cause the problem of soil overcoming the first soil-covering board 42 described above, clayey, poorly draining soil is particularly prone to this problem. The second surface 422 can resolve the above-mentioned problem.

[0034] The protrusion 423 is provided on the second surface 422. The protrusion 423 is provided on the outside of the first soil-piling plate 42, which is on the side away from the track A, and is provided in continuous with the second surface 422. The outer end of the second surface 422 protrudes outward from the first soil-piling plate 42, which is on the side away from the outer end of the first surface 421. The second surface 422, which has the protrusion 423, allows the embankment E, which is soil above the reference plane over a wide area to the left and right when viewed from the direction of travel compared to the first surface 421, to be moved toward the track A. When the first soil-raising plate 42 is in use, the protrusion 423 is not completely buried in the soil, and at least the upper part of the protrusion 423 protrudes above the soil surface (reference plane). As shown in Figure 10, the already formed embankment E2 can be moved toward the track A by the second surface 422, which includes the protrusion 423, without the use of a traveling machine formed on the soil surface. Although not shown in Figure 10, even if the peak of the embankment E1 formed by the passage of the traveling machine is formed near the protrusion 423, which is outside the first soil-raising plate 42, it can still be moved toward the track A by the second surface 422, which includes the protrusion 423.

[0035] The outer edge portion 425 is the outer side end of the first soil-piling plate 42, formed from the outer lower end on the side away from the track A of the protrusion 423 to the outer lower end on the side away from the track A of the first surface 421. As shown in Figure 4, the outer edge portion 425 is formed to be recessed upward from a hypothetical straight line 426 connecting the outer lower end of the protrusion 423 to the outer lower end of the first surface 421. In this embodiment, it is formed in the shape of a curved arc, but it may be formed by combining multiple line segments, or by combining a curved line including an arc with line segments. This outer edge portion 425 forms a passage region 424 between the protrusion 423 of the second surface 422 and the first surface 421, which is a region through which soil can pass. Soil can pass through the recessed passage area 424 below the outer edge 425.

[0036] The passage area 424 is concave and is formed in the soil below the protrusion 423 and below the reference plane. By configuring the passage area 424 below the protrusion 423, the soil located below the protrusion 423 does not move along the first soil-piling plate 42 to the track A, but instead moves relatively backward in the direction of travel. In other words, the soil in the portion that overlaps with the passage area 424 in the direction of travel is not captured by the first soil-piling plate 42 and does not move along the front surface of the first soil-piling plate 42 toward the track A. As shown in Figures 4 and 10, the relative width of the first surface 421 can be made smaller than that of the second surface 422, and the difference in width between the protrusions 423 provided on the first surface 421 and the second surface 422 can be increased. By making the outer edge 425 concave, a larger passage area 424 can be formed, and a larger amount of soil can be secured to pass through the passage area 424.

[0037] The synergistic effect of the protruding portion 423 and the passing region 424 or outer edge portion 425 will be explained. In the case of soil movement toward track A without passing through passage area 424, the amount of soil moved on the first surface 421 located in the soil is smaller compared to the case where passage area 424 is also configured as the first surface 421. Therefore, when the soil moves toward track A along the first surface 421, the amount of soil that rises toward the second surface 422, which is located above the first surface 421 and above the water level of the mud (reference surface), can be reduced. Furthermore, the protrusion 423 above passage area 424 moves the soil directly below the reference surface and the embankment E above the reference surface toward track A. In other words, the distance the soil moves along the front surface of the first surface 421 can be shortened, so the time required for movement is also shortened, and the amount of soil that rises toward the second surface 422 can be reduced.

[0038] With the configuration of this embodiment of the invention, even if the amount of soil is insufficient to fill the track A when moving soil by the first surface 421 located below the reference surface, the track A is filled by replenishing the deficiency through soil movement of the upper soil surface and embankment E by the protrusion 423. Since the soil of the topsoil layer including embankment E (E1, E2) is moved, the soil can be leveled efficiently. Furthermore, by reducing the amount of soil rising upward from the first surface 421 to the second surface 422, the obstruction of soil flow B toward the track A on the first surface 421 and the second surface 422 is reduced, enabling efficient soil movement. The configuration of the first soil-lifting plate 42 makes it possible to capture embankments E1 that have risen upward at locations far from the track, as well as already formed embankments E2. Regardless of the travel speed of the vehicle, it is possible to level embankments E over a wide area and move the soil from embankments E to the track A.

[0039] In Figure 6, the solid line represents the state in which the first soil-piling plate 42 has rotated due to the load of soil moving relative to it from the front, while the dashed line represents the position of the first soil-piling plate 42 before rotation under low load conditions. Figure 7 is a cross-sectional view of the first soil-piling plate 42 according to an embodiment of the present invention, viewed from a plane around the pivot axis 61, and shows the state in which the first soil-piling plate 42, indicated by the solid line in Figure 6, is rotated under load. Figure 8 is a cross-sectional view of the first soil-raising plate 42 according to an embodiment of this invention, viewed from a plane around the pivot axis 61. In Figure 6, the solid line shows the first soil-raising plate 42 in a state where it is not under load. The mechanism by which the first soil-raising plate 42 rotates around the pivot axis 61 under load will be described later.

[0040] In this embodiment of the invention, as shown in Figure 4, the lower end of the first surface 421 adjacent to the outer edge 425 has an inclined portion 427. The shape of the inclined portion 427 can determine the characteristics of the amount of soil that moves on the first surface 421. The inclined portion 427 is not limited to the example shape, and the characteristics of soil movement on the first surface 421 can be freely adjusted by changing the shape and angle of the inclined portion 427. Furthermore, the inclined portion 427 can also be included in the outer edge 425, and the area below the inclined portion 427 can also be made into a passage region 424. In this embodiment, the inclined portion 427 is configured as a straight line, but it may be formed as a curved line, or it may be formed by combining a curved line including an arc with a line segment. Although the first surface 421 and the second surface 422 were described as being composed of simple planes, the first surface 421 and the second surface 422 may be curved in two or three dimensions, or uneven surfaces may be further formed on the plane or curved surface.

[0041] As shown in Figure 10, the first soil-piling plate 42 is positioned near the boundary of the track A when viewed from the direction of travel, and near the boundary of the track A on the widthwise side with respect to the direction of travel of the vehicle. The outer lateral end of the first soil-piling plate 42 on the track A is positioned further forward than the inner lateral end on the track A. That is, as shown in Figures 11, 13, 15, and 17, the first soil-piling plate 42 in a plan view is positioned so as it slopes backward as it moves towards the inside of the track A. With this arrangement, when the first soil-piling plate 42 is advanced, the soil moves relative to the first soil-piling plate 42, and when it reaches the first soil-piling plate 42, the direction of movement of the soil is changed so that the soil flow B moves along the surface of the first soil-piling plate 42. This soil then moves towards the inside of the track A along the surface of the first soil-piling plate 42, thereby replenishing the track A.

[0042] The first soil-raising plate 42 is described as being positioned near the outer boundary of the track A with respect to the width in the direction of travel of the machine. In this embodiment, the inner lateral end of the first soil-raising plate 42 of the track A is positioned inward relative to the boundary of the track A. This positioning ensures that the soil moved by the first soil-raising plate 42 is reliably supplied to the track A. In addition, in this embodiment, the first soil-raising plate 42 is positioned inside the support frame 24 or transmission case 23 of the central work unit 11. With this positioning, the track A, to which the soil has been supplied, is roughly leveled, and the soil-crushing section 3 located at the rear of the first soil-raising plate 42 tills and crushes the soil, including the area where the original track A was located.

[0043] 43 is the second soil-piling plate. As shown in Figures 10 to 18, the second soil-piling plate 43 is located in front of the soil-crushing section 3 and below the cover body 4, and is a plate-shaped member placed on one side of one of the tracks where the first soil-piling plate 42 is positioned. Furthermore, the second soil-piling plate 43 is positioned outward from the first soil-piling plate, away from the track A, and the surface on which it is positioned is inclined towards the rearward side as it moves inward relative to the width of the agricultural implement 1, which is the width of the machine body, in a plan view. The second soil-piling plate 43 is installed on the end side of the cover body 4, which is further out than the width of the agricultural implement 1 than the first soil-piling plate 42. In this embodiment, the second soil-piling plate 43 is positioned in front of the transmission cases 23 or support frames 24 located at both ends of the cover body 4. The first soil-piling board 42 and the second soil-piling board 43 are installed on the same boundary side with respect to a single rut formed in the field by the agricultural implement 1, which is a moving vehicle. The second soil-relieving plate 43 has a smaller area than the first soil-relieving plate 42, and is used with most of its area buried in the soil. The second soil-relieving plate 43 can move soil that was not captured by the first soil-relieving plate 42 and could not move to the track A side. As shown in Figure 6, the second soil-relieving plate 43 properly adjusts the soil flow B near the first soil-relieving plate 42 that has passed through the passage area 424 of the first soil-relieving plate 42 and moved to the rear side of the first soil-relieving plate 42, forming a passage path F which is the path for soil to move to the track A side. The passage path F is formed between the first soil-relieving plate 42 and the second soil-relieving plate 43, that is, behind the first soil-relieving plate 42 and in front of the second soil-relieving plate 43.

[0044] The second soil-piling plate 43, which is the soil-piling body, is positioned slightly away from the boundary of the rut, which is the track A, to move soil into the rut, erase the track, and level the surface. In this embodiment, the second soil-piling plate 43 has a simple plate shape, but the upper part of the second soil-piling plate 43 may be bent to tilt slightly forward, so that soil moving along the front of the second soil-piling plate 43 does not ride up onto the second soil-piling plate 43 and move backward. The second soil-piling plate 43 is fixed to the support frame 24 as shown in Figures 3, 10 to 18.

[0045] As shown in Figures 10, 12, 14, 16, and 18, the second soil-relieving plate 43 is positioned near the boundary of the track A when viewed from the direction of travel, on the same side as the first soil-relieving plate 42, which is on the outer side in the width direction relative to the direction of travel of the machine. Furthermore, it is positioned offset to the outside of the track A relative to the first soil-relieving plate 42. The outer lateral end of the second soil-relieving plate 43 is positioned on the forward direction side than the inner lateral end of the track A. In other words, in a plan view, the second soil-relieving plate 43 is positioned so as it approaches the inside of the track A. The second soil-piling plate 43 tilts backward as it moves towards the inside of the track A, causing the soil to move relative to the second soil-piling plate 43 and changing the direction of soil movement so that when it reaches the second soil-piling plate 43, the soil flow B moves along the surface of the second soil-piling plate 43. This soil then moves inward along the surface of the second soil-piling board 43, supplying soil to the track A.

[0046] The second soil-piling plate 43 is positioned in front of the support frames 24 located at both the left and right ends of the soil-crushing section 3, and the transmission case 23 provided by the support frames 24. Here, the support frames 24 and the transmission case 23 are the parts that support the soil-crushing section 3 which has a rotating member, and the area in the vicinity, including the front and rear portions in the direction of travel, is an uncultivated area D, which is an uncultivated area that the tilling claws 32 of the soil-crushing section 3 cannot reach. The area that the tilling claws 32 can reach is the tilled area C, and is sometimes called the working area C. Much of the uncultivated area D, which is uncultivated soil, contains soil clods, and if these soil clods reach the support frames 24 and the transmission case as they are, they will pass near the support frames 24 and the transmission case without being crushed in the soil-crushing section 3, and will be leveled. As a result, even if the soil appears to be level at first glance, soil clods will be present inside, which may affect subsequent operations such as planting or rice transplanting, preventing them from being performed properly.

[0047] As shown in Figures 10, 12, 14, 16, and 18, the second soil-raising plate 43 is positioned in front of the uncultivated area D, which is the part of the soil-crushing section 3 that is not the cultivated area C. This guides the uncultivated soil clumps to the soil-crushing section 3, where they can be crushed. Furthermore, the second soil-raising plate 43 has a smaller working area than the first soil-raising plate 42. This prevents unnecessary movement of large amounts of soil towards the track A, and allows for the supply of only the necessary minimum amount of soil to the soil-crushing section 3 and the track A. Thus, the second soil-raising plate 43 plays a role in supplying soil to the track A and promoting the crushing of soil in the uncultivated areas.

[0048] 44 is the third soil-piling plate. The third soil-piling plate 44 is located in front of the soil-crushing section 3 and below the cover body 4, positioned on the other side of the rut, and the surfaces located on the left and right sides in the direction of travel, further out than the second soil-piling plate 43, are inclined towards the rear as they move inward relative to the width of the agricultural implement 1, which is the width of the machine body. The third soil-piling plate 44 is located on the central side of the cover body 4 of the agricultural implement 1, and is installed inward relative to the width of the agricultural implement 1 in the direction of travel, relative to the width of the machine body, compared to the first soil-piling plate 42 and the second soil-piling plate 43. The third soil-piling plate 44 is installed opposite the first soil-piling plate 42 and the second soil-piling plate 43, with the width of a single rut formed in the field by the moving vehicle in between. In other words, the first soil-piling plate 42 and the second soil-piling plate 43 are positioned near the boundary on one side of a single rut, while the third soil-piling plate 44 is positioned near the boundary on the opposite side.

[0049] The front end of the third soil-raising plate 44 is located behind the front end of the first soil-raising plate 42. The third soil-raising plate 44 is positioned slightly behind the first soil-raising plate 42 to allow for a larger gap between it and the vehicle body located in front of it. The front ends of the first soil-raising plate 42, the second soil-raising plate 43, and the third soil-raising plate 44 each protrude forward from the front end of the cover body 4. The third soil-raising plate 44 is positioned near the center of the cover body 4 in the width direction of the machine, while the first soil-raising plate 42 and the second soil-raising plate 43 are positioned at the ends of the cover body 4 in the width direction of the machine. Before the soil reaches the crushed soil section 3 located behind the front end of the cover body 4, the flow of the soil can be determined and the soil can be sent in advance to the rutted track A.

[0050] 5 is a leveling body. Leveling body 5 is attached to the rear of cover body 4 when agricultural implement 1 is in operation. As agricultural implement 1 moves, it is positioned behind soil crushing section 3 and levels the field after soil crushing. 5L is the left leveling unit. The left leveling unit 5L is attached to the rear of the left cover unit 4L and forms the left end in the direction of travel when leveling unit 5 is in operation. 5R is the right leveling unit. The right leveling unit 5R is attached to the rear of the right cover unit 4R and forms the right end in the direction of travel when leveling unit 5 is in operation.

[0051] 521 is a hinge. The hinge 521 attaches the first leveling body 51, left first leveling body 51L, and right first leveling body 51R, which are the front parts of leveling body 5, left leveling body 5L, and left leveling body 5R respectively, to the cover body 4, left cover body 4L, and right cover body 4R via a pivot axis fitted into the hinge 521, allowing them to rotate up and down as pivot points.

[0052] 56 is the second leveling body. The second leveling body 56 levels the ground at the rear end of the first leveling body 51 attached to the agricultural implement 1, as shown in Figure 2, which shows a side view of the agricultural implement 1. 56L is the second left leveling unit. The second left leveling unit 56L levels the area behind cover unit left 4L, which is located on the left side in the direction of travel. 56R is the right second leveling unit. The right second leveling unit 56R levels the area behind cover unit right 4R, which is located on the right side in the direction of travel. 522 is a hinge. The hinge 522 is a pivot point provided at the rear end of the first leveling body 51, the left first leveling body 51L, and the right first leveling body 51R, respectively, and allows the second leveling body 56, the left second leveling body 56L, and the right second leveling body 56R to rotate up and down relative to the first leveling body 51, the left first leveling body 51L, and the right first leveling body 51R.

[0053] The first soil-piling plate 42, the second soil-piling plate 43, and the third soil-piling plate 44, which are soil-piling bodies, are positioned behind the tractor in the direction of travel and in front of the soil-crushing section 3 in the direction of travel, making it possible to move soil into the tracks A formed by the tractor and erase the tracks A. The soil that has been roughly leveled in advance by the soil-piling bodies is crushed in the soil-crushing section 3, and this crushed soil can be leveled evenly by the leveling body 5.

[0054] The rotation mechanism of the first soil-piling plate 42 will now be explained. 61 is a pivot axis. 62 is a boss. The pivot axis 61 is provided in the inner diameter of the boss 62 and is capable of vertical movement in the axial direction and rotation around the axis. The pivot axis 61 allows the first soil-relieving plate 42, which is integrally provided on the front side of the pivot axis 61, to rotate in a nearly horizontal direction. By rotating the first soil-relieving plate 42, the frontal projected area of ​​the first soil-relieving plate 42 when viewed from the front in the direction of travel can be changed. In this embodiment, the pivot axis 61 and the boss 62 are located at the front of both ends of the cover body 4. The pivot point of the first soil-piling plate 42 in the width direction can be changed by selecting the mounting position of the first soil-piling plate 42 in the left-right direction relative to the direction of travel of the pivot axis 61. By rotating the first soil-piling plate 42 around the pivot axis 61, the area of ​​the first soil-piling plate 42 on both the left and right sides of the pivot axis 61 can be changed, on one side relative to the left-right width in the direction of travel from the pivot axis 61 and on the other side relative to the left-right width in the direction of travel from the pivot axis 61. The pivot axis 61, via the boss 62, allows the first soil-piling plate 42 to move vertically and also allows the first soil-piling plate 42 to be fixed at any position in the vertical direction.

[0055] In this embodiment of the invention, the first soil-piling plate 42 has a pivot axis 61 positioned vertically to rotate it in a substantially horizontal direction. This pivot axis 61 is designed to rotate the plate due to the load generated on the rear side when soil moves relative to the front of the first soil-piling plate 42 and reaches the first soil-piling plate 42. In this embodiment of the invention, when the load increases, the front end of the first soil-piling plate 42 rotates so that it faces backward. This allows the first soil-piling plate 42 to change the angle at which the soil faces the track A in a plan view.

[0056] 71 is an elastic member. The elastic member 71 biases the first soil-piling plate 42, which is rotatable by the pivot axis 61, in one direction of rotation. In Figure 5, 65 is a hole for adjusting the vertical position of the pivot shaft 61, and 66 is a holding member that holds the pivot shaft 61 in the vertical direction. The vertical position adjustment hole 65 is a through hole provided in the axial direction of the pivot shaft 61. The holding members 66, 66 have cylindrical portions provided coaxially with the pivot shaft 61 so as to sandwich the boss 62 from above and below, and restrict the movement of the boss 62 in the vertical direction of the pivot shaft 61. The holding members 66, 66 are attached to and fixed to the cover body 4. 67 is a fixing member made of a bolt, and 68 is a cover member. By passing the fixing member 67 through the boss 62 and the hole 65, the vertical position of the pivot shaft 61 is fixed and positioned. In other words, the boss 62 is positioned between the upper and lower holding members 66, 66, and the pivot shaft 61 passes through it. Furthermore, the fixing member 67 passes through the boss 62 and the hole 65, thereby fixing both the vertical position of the boss 62 itself and the vertical position of the pivot shaft 61. Even with the vertical position fixed, the pivot shaft 61 is configured to be able to rotate horizontally.

[0057] In this embodiment of the invention, the soil-relieving plate (first soil-relieving plate 42) is provided so as to be able to rotate within a range set in the horizontal direction by a vertical pivot axis 61. When the load from the front of the soil-relieving plate (first soil-relieving plate 42) increases, it rotates so as to increase the frontal projected area of ​​the soil-relieving plate (first soil-relieving plate 42). Furthermore, the soil-piling plate (first soil-piling plate 42) is biased in the rotational direction by the elastic member 71, and rotates so that the frontal projected area of ​​the soil-piling plate decreases when the load decreases. In other words, the elastic member 71 biases the first soil-piling plate 42 in a direction that reduces the frontal projected area of ​​the first soil-piling plate 42.

[0058] A first soil-piling plate 42, which is a soil-piling body, is fixed in front of the pivot axis 61, and the pivot axis 61 is the effective pivot axis 61 of the first soil-piling plate 42. The pivot axis 61 can slide vertically and rotate around the axis relative to the holding members 66, 66. The first soil-piling plate 42 can be attached and detached by pulling the pivot axis 61 out of the holding members 66, 66. The cylindrical part of the holding members 66, 66 is sometimes called the upper collar 661 when positioned on the upper side, and the lower collar 662 when positioned on the lower side. The pivot shaft 61 is provided with multiple vertical position adjustment holes 65. After passing the pivot shaft 61 through the upper collar 661 and the lower collar 662, the vertical position can be selected and fixed with the boss 62, thereby restricting the vertical movement of the pivot shaft 61. As a result, the vertical position of the soil mounding body (first soil mounding plate 42) can be adjusted.

[0059] The elastic member 71 is positioned between the upper collar 661 and the lower collar 662, and below the boss 62. In this embodiment, the elastic member 71 is a coil spring. Below the boss 62, a cover member 68 is fixed so as to surround the elastic member 71. The elastic member 71 spans the holding member 66, which has the lower collar 662, and the cover member 68. The elastic member 71 biases the soil mounding body (first soil mounding plate 42) to rotate to one side via the fixing member 67, the boss 62, and the pivot axis 61. In this embodiment, a coil spring is shown, but the elastic member 71 may also be a compression spring, tension spring, or fluid pressure elastic member 71 arranged to rotate to one side. The cover member 68 is in contact with the holding member 66, thereby restricting the range of rotation around the pivot axis 61. In other words, the rotation of the boss 62 is restricted, and the rotation of the pivot shaft 61, which is fixed to the boss 62 by the fixing member 67, is also restricted, thereby restricting the rotation of the first soil-piling plate 42.

[0060] The positional relationship between the first soil-piling board 42 and the second soil-piling board 43 will be explained. The following explanation will be given in accordance with Figures 7, 8, 10, 13, and 14, assuming that the first soil-piling plate 42 is subjected to a load and the outer end of the first soil-piling plate 42, which is the front end of the first soil-piling plate 42 and is away from the track A, rotates backward. In Figures 10, 12, 14, 16, and 18, C represents the working area (cultivated area), and D represents the uncultivated area. At this time, the outer end of the second soil-piling plate 43, which is the front end and is away from the track A, is positioned in a plan view and a side view to be approximately the same as, or slightly behind, the inner end of the first soil-piling plate 42, which is the rear end and is closer to the track A, in terms of the longitudinal position in the direction of travel. Furthermore, in both plan and front views, the front end of the first soil-relieving plate 42 and the front end of the second soil-relieving plate 43 coincide in the width direction relative to the direction of travel, or the front end of the second soil-relieving plate 43 is positioned slightly offset from the front end of the first soil-relieving plate 42. In this way, the second soil-relieving plate 43 is positioned so that, in the width direction relative to the direction of travel, all or at least part of it overlaps with the first soil-relieving plate 42 in a front view. The second soil-piling plate 43 is positioned so that its left-right position, when viewed from the direction of travel, overlaps with that of the first soil-piling plate 42, i.e., it is positioned so that it is spaced apart from the first soil-piling plate 42 in the front-rear position, thereby moving the soil toward the track A.

[0061] Furthermore, unlike the first soil-piling plate 42, the second soil-piling plate 43 is used with almost its entire surface buried in the soil. In contrast, the first soil-piling plate 42 is used with its upper part protruding above the soil surface. In this embodiment, the first soil-piling plate 42 has a first surface 421 that is embedded in the soil, and a second surface 422 that is located above the first surface 421 and protrudes upward from the soil. The second surface 422 is provided to protrude laterally from the lateral end of the first surface 421 that is away from the track A. In a front view when the front end of the first soil-piling plate 42 is turned backward, the second surface 422, which is part of the first soil-piling plate 42, is provided so as to overlap with the second soil-piling plate 43 in the left-right direction.

[0062] The soil flow B when the first soil-hedging plate 42 and the second soil-hedging plate 43 are arranged will be explained. The first soil-piling plate 42 is positioned near the boundary of the track A, and as it moves forward, it is positioned outside of the track A. As the first soil-piling plate 42 moves forward, it captures the soil pushed aside in the left and right directions by the vehicle. The first surface 421 captures the soil in the ground and moves the soil along the first surface 421 towards the track A. Also, as shown in Figure 10, the second surface 422 and the protrusions 423 formed on the second surface capture the embankment E1 formed by the vehicle, which is a portion of the soil surface that rises above the reference surface, and moves the soil along the second surface 422 towards the track A. E2 is an embankment that has already been formed independently of the vehicle. The second surface 422 is configured to capture the embankment E2 as well.

[0063] The soil below the protrusion 423, on the side of the outer edge 425 away from the track A, passes through the passage area 424 and moves directly backward in the direction of travel relative to the first soil-piling plate 42. Some of this soil may move in a way that curves around immediately after the first soil-piling plate 42, which can disrupt the soil flow B after passing the first soil-piling plate 42, resulting in turbulent flow. Turbulence can form a flow that entrains the surrounding soil, eroding the soil and potentially causing depressions in the field. Furthermore, turbulence can move the surrounding soil while entraining it, potentially causing the unintentional movement of large amounts of soil.

[0064] As shown in Figure 10, the second soil-reducing plate 43 is positioned so that, in a front view, it overlaps with the first soil-reducing plate 42 by at least a portion of its width. Soil that has passed through the first soil-reducing plate 42 can be guided by the second soil-reducing plate 43 to move towards the track A. At this time, the positioning of the second soil-reducing plate 43 suppresses the degree of turbulence in the soil flow B after passing through the first soil-reducing plate 42, allowing the soil to move towards the track A without digging into the surrounding soil. Furthermore, by suppressing turbulence, the movement of unintended amounts of soil can also be suppressed. The path through which the soil moves between the first soil-piling plate 42 and the second soil-piling plate 43 is called the passage path F, and the formation of passage path F allows an appropriate amount of soil to move to the track A. Therefore, the soil before pulverization is properly leveled in the pulverization section 3.

[0065] Furthermore, since the second soil-raising plate 43 is smaller than the first soil-raising plate 42, it does not excessively move soil towards the track A side, thereby improving the proper leveling of the soil before crushing. Also, since the second soil-raising plate 43 is positioned embedded in the soil, it regulates the flow in the underground passage without affecting the surface soil flow B. In other words, the second soil-raising plate 43 is configured to regulate the soil flow B while ensuring a sufficient area for the amount of soil moving towards the track A side, thereby suppressing excessive soil movement and leveling the soil without digging it up. Since mud, which is soil, has a large amount of moisture distributed in the surface layer, it can effectively move soil by acting only within the soil.

[0066] The soil that passes through the passage area 424 below the second surface 422 of the first soil-raising plate 42 is subsoil and may contain clods of soil. The second soil-raising plate 43, positioned in front of the area that is not the tilling area C, captures the soil and moves it toward the track A. After the second soil-raising plate 43 has finished guiding, the soil is crushed by the soil-crushing section 3 located at the rear. In other words, the second soil-raising plate 43 allows the clods of soil that have passed through the passage area 424 to move toward the working area C, which is the tilling area C, without moving toward the area that is not the tilling area C. After being crushed by the soil-crushing section 3, the soil is uniformly leveled by the leveling body, and the work is completed.

[0067] The first soil-raising plate 42 and the second soil-raising plate 43 allow the soil-crushing section 3 to eliminate the tracks A formed in the soil before crushing, creating a proper surface, while also enabling the crushing of soil clumps located in front of the uncultivated area D, which is not the work area C. This ensures that the soil after the agricultural implement 1 with a working body has passed through can be uniformly leveled.

[0068] Regarding other positional relationships, we will now explain the case where the first soil-piling plate 42 is not subjected to any load and the front end of the first soil-piling plate 42 does not rotate backward, as shown in Figures 11 and 12. When the travel speed is slow, the first soil-relieving plate 42 is rotated so that its frontal projected area when viewed from the front is reduced. At this time, the first soil-relieving plate 42 and the second soil-relieving plate 43 form a passage path that does not overlap in the left-right direction when viewed from the front, as shown in Figure 12. When the load on the first soil-piling plate 42 is small, that is, when the travel speed is slow, the range of soil movement in the width direction relative to the direction of travel from the track A as the vehicle passes is small. For this reason, the first soil-piling plate 42 can move soil sufficiently to the track A even when its frontal projection surface is small.

[0069] On the other hand, since the second soil-raising plate 43 is positioned in front of the work area C, it can move soil clumps in the soil towards the soil-crushing section 3. Also, when the travel speed is slow, the turbulence of the mudflow passing to the side of the first soil-raising plate 42 is not as great as when the travel speed is high. Even if the front end of the first soil-raising plate 42 moves forward and the passage path formed by it and the second soil-raising plate 43 becomes larger, soil turbulence can be suppressed. In other words, because the velocity is low, the generation of turbulence at the first soil-piling plate 42 is also reduced, so soil erosion caused by turbulence can be suppressed. The second soil-piling plate 43 can bring the soil clumps in front of the uncultivated area to the soil-crushing section 3, thereby leveling the soil and promoting soil crushing. Then, as the travel speed increases and the load increases, the first soil-piling plate 42 rotates around the pivot axis, as shown in Figures 13 and 14, thereby increasing its frontal projected area and overlapping with the second soil-piling plate 43.

[0070] Figure 15 is a plan view of an embodiment of the present invention, in which the mounting position has been changed to the right in the figure from that shown in Figure 11, and the first soil-relieving plate 42 is in a state before it is subjected to a load and is superimposed with the second soil-relieving plate 43. The second soil-relieving plate 43 is positioned so that its front-to-back position, when viewed from the direction of travel, overlaps with that of the first soil-relieving plate 42, i.e., it is positioned in a superimposed manner. Figure 16 is a front view of the state in which the mounting position has been changed to the right in the figure from that shown in Figure 12 and is superimposed with the second soil-relieving plate. Figure 17 is a plan view of an embodiment of the present invention, in which the mounting position has been changed to the right in the figure compared to that shown in Figure 13, and the first soil-piling plate is under load and is overlapping with the second soil-piling plate. Figure 18 is a front view of the state in which the mounting position has been changed to the right in the figure compared to that shown in Figure 14 and is overlapping with the second soil-piling plate. As shown in Figures 14, 16, and 18, when viewed from the front, unlike in Figure 12, the first soil-piling board 42 overlaps with the second soil-piling board 43. As shown in Figures 15, 16, 17, and 18, the first soil-piling plate 42 and the second soil-piling plate 43 can be pre-configured to overlap on both sides in the direction of travel, regardless of speed or load.

[0071] In this embodiment of the invention, as shown in Figures 15 and 16, a portion of the second soil-piling plate 43 overlaps with the first soil-piling plate 42 in the left-right direction relative to the direction of travel when the load is small, forming a passage path. In this case, although the turbulence of the mudflow passing to the side of the first soil-piling plate 42 is not greatly disturbed, the passage path formed between it and the second soil-piling plate 43 can further suppress the turbulence of the mudflow. In other words, the soil before crushing can be leveled even more effectively.

[0072] As the travel speed increases and the load on the first soil-piling plate 42 increases, the front end of the first soil-piling plate 42 moves backward, as shown in Figures 17 and 18. At this time, all of the second soil-piling plates 43 in the left-right direction are positioned to overlap the first soil-piling plate 42. In other words, regardless of speed or load, the second soil-piling plate 43 overlaps with the first soil-piling plate 42 in at least a portion of the left-right direction in a front view. The second soil-piling plate 43 captures the soil passing through the lateral passage area 424 of the first surface 421 of the first soil-piling plate 42 and moves it toward the track A side. Since a passage path F is formed between the second soil-piling plate 43 and the first soil-piling plate 42, soil turbulence can be suppressed, and as a result, soil erosion caused by turbulence can be suppressed. In addition, the second soil-piling plate 43 can bring the soil clumps in front of the uncultivated area D to the soil-crushing section 3, so it still levels the soil and promotes soil crushing. [Explanation of symbols]

[0073] 1. Agricultural machinery (mobile body) 3 Crushing section 32 Cultivating Claw 42. First soil-piling board 43. Second soil-piling board 61 Swivel axis 71 Elastic members 421 Page 1 422 2nd page 423 Protrusion 424 Passage area 426 Virtual Straight Line A Track B Soil flow

Claims

1. A work unit equipped with a soil-crushing section that operates at the rear of the mobile machine, A first soil-moving plate is positioned in front of the work body and near the boundary of the track formed by the traveling machine, and moves soil toward the track. A second soil-piling plate is positioned near the boundary of the track in front of the workpiece, away from the track than the first soil-piling plate, and positioned such that its front-to-back position overlaps with the first soil-piling plate when viewed from the direction of travel, and moves soil toward the track. Equipped with, The first soil-piling board has a first surface located at the bottom of the soil-piling board, A second surface having a continuous surface extending upward from the first surface and a protruding portion extending from the outer end of the first surface in the surface direction, It is equipped with a protruding part that extends outward and moves through the soil, The outer edge formed from the lower end of the protrusion to the lower end of the second surface is formed to be recessed upward from the straight line connecting the lower outer end of the protrusion to the lower end of the second surface, and below the outer edge is a passage area through which soil can pass, A farming machine characterized by being equipped with the following features.

2. The second soil-piling plate is positioned in front of the part of the work body that is not in the work area when viewed from the direction of travel, and has a smaller frontal projected area than the first soil-piling plate when viewed from the front in the direction of travel. The agricultural implement described in feature 1.

3. Between the first soil-piling plate and the second soil-piling plate in the direction of travel, a passage path is formed that allows soil to pass through toward the track as viewed from the direction of travel, An agricultural implement according to claim 1 or 2, characterized by being equipped with the following:

4. The first soil-piling plate has a pivot axis that can rotate in a substantially horizontal direction, When the first soil-piling plate rotates around the pivot axis, its front-to-back position, as viewed from the direction of travel, coincides with that of the second soil-piling plate. The agricultural implement described in feature 1.

5. A first soil-moving plate is positioned in front of a work body equipped with a soil-crushing section that operates at the rear of the traveling machine, near the boundary of the track formed by the traveling machine, and moves soil toward the track. A second soil-piling plate is positioned near the boundary of the track in front of the workpiece, away from the track than the first soil-piling plate, and positioned such that its front-to-back position overlaps with the first soil-piling plate when viewed from the direction of travel, and moves soil toward the track. Equipped with, The first soil-piling board has a first surface located at the bottom of the soil-piling board, A second surface having a continuous surface extending upward from the first surface and a protruding portion extending from the outer end of the first surface in the surface direction, It is equipped with a protruding part that extends outward and moves through the soil, The outer edge formed from the lower end of the protrusion to the lower end of the second surface is formed to be recessed upward from the straight line connecting the lower outer end of the protrusion to the lower end of the second surface, and below the outer edge is a passage area through which soil can pass, A soil-raising plate for agricultural machinery, characterized by having the following features.

6. The second soil-piling plate is positioned in front of the part of the work body that is not in the work area when viewed from the direction of travel, and has a smaller frontal projected area than the first soil-piling plate when viewed from the front in the direction of travel. The soil-raising plate for agricultural machinery according to feature 5.

7. Between the first soil-piling plate and the second soil-piling plate in the direction of travel, a passage path is formed that allows soil to pass through toward the track as viewed from the direction of travel, A soil-raising plate for agricultural machinery according to claim 5 or 6, characterized by being equipped with the above.

8. The first soil-piling plate has a pivot axis that can rotate in a substantially horizontal direction, When the first soil-piling plate rotates around the pivot axis, its front-to-back position, as viewed from the direction of travel, coincides with that of the second soil-piling plate. The soil-raising plate for agricultural machinery according to feature 5.

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