Agricultural machinery

Abstract

To provide an agricultural implement having a soil-piling body that can improve the soil-piling effect. [Solution] An agricultural machine comprising: a first soil-piling body 42, a second soil-piling body 43, and a third soil-piling body (not shown) located behind the traveling body 1, which can move soil into the tracks formed by the traveling body 1 and erase the tracks; and a soil-crushing section 3 located behind the soil-piling body, wherein the soil-piling body comprises: a soil-piling surface 431 that moves soil laterally in the direction of travel; and a flow straightening section 432 that is formed continuously from the lower end of the soil-piling surface 431 toward the rear and has a guide surface 433 whose rear end is oriented toward the rear so that mud flowing below the soil-piling surface 431 can pass through; the guide surface 433 has a guide distance that reaches from the soil-piling surface 431 to the vicinity of the front of the soil-crushing section 3, thereby suppressing turbulence in the mudflow that is about to occur behind the soil-piling body as it passes beneath the soil-piling surface 431, and suppressing mud undulation.

Description

Technical Field

[0001] This invention relates to agricultural working machines. More specifically, it relates to a rotary tiller that levels the soil roughly and evenly in advance with a soil pushing body and then prepares the soil with a soil crushing part.

Background Art

[0002] As an example of a working machine that tills and levels a field while performing a rotary tilling operation by rotating and driving tilling claws mounted on a traveling machine body, there is Patent Document 1. In this invention, a soil pushing plate for pushing soil into the groove formed on the field surface by a tire or the like as the traveling machine body passes is provided.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When the working speed is increased with the lower end of the soil pushing plate standing vertically with respect to the soil surface as in the soil pushing plate described in Patent Document 1, a vortex of the soil flow occurs at the lower end of the soil pushing plate. Due to this vortex, the soil surface may be dug up, and the soil pushing effect by the soil pushing plate may decrease.

[0005] Therefore, the present invention has been made by focusing on the above problems, and an object thereof is to provide an agricultural working machine having a soil pushing body capable of improving the soil pushing effect.

Means for Solving the Problems

[0006] This invention includes a soil pushing body located behind the traveling machine body and capable of moving soil to the traveling track formed by the traveling machine body to erase the traveling track, and a soil crushing part disposed behind the soil pushing body. The aforementioned soil-piling body has a soil-piling surface that moves soil laterally in the direction of travel, The system comprises a flow straightening section formed continuously from the lower end of the soil mounding surface toward the rear, and having a guide surface whose rear end is oriented toward the rear so that mud flowing beneath the soil mounding surface can pass through, The guide surface has a guide distance that extends from the soil mounding surface to the vicinity of the front of the soil crushing section, thereby suppressing turbulence in the mudflow that is about to occur behind the soil mounding body as it passes below the soil mounding surface, and suppressing the undulation of the mud. Agricultural machinery characterized by, It relates to.

[0007] This invention is A soil-piling body located behind the traveling machine, capable of moving soil into the tracks formed by the traveling machine to erase the tracks, It comprises a soil crushing section located behind the aforementioned soil mounding body, The aforementioned soil-piling body has a soil-piling surface that moves soil laterally in the direction of travel, The system comprises a flow straightening section formed continuously from the lower end of the soil mounding surface toward the rear, and having a guide surface whose rear end is oriented toward the rear so that mud flowing beneath the soil mounding surface can pass through, The guide surface has a guide distance that extends from the soil mounding surface to the vicinity of the front of the soil crushing section, thereby suppressing turbulence in the mudflow that would otherwise occur behind the soil mounding body as it passes beneath the soil mounding surface, and thereby suppressing erosion of the mud. Agricultural machinery characterized by, It relates to.

[0008] This invention is A soil-piling body located behind the traveling machine, capable of moving soil into the tracks formed by the traveling machine to erase the tracks, It comprises a soil crushing section located behind the aforementioned soil mounding body, The aforementioned soil-piling body has a soil-piling surface that moves soil laterally in the direction of travel, The system comprises a flow straightening section formed continuously from the lower end of the soil mounding surface toward the rear, and having a guide surface whose rear end is oriented toward the rear so that mud flowing beneath the soil mounding surface can pass through, The guiding surface has a guiding distance reaching near the front of the crushed soil part from the soil accumulation surface, passes below the soil accumulation surface, suppresses the turbulence of the mud flow that is about to occur behind the soil accumulation body, and suppresses the undulation and upheaval of the soil and mud. An agricultural working machine characterized by: relates to.

[0009] This invention further provides: The rectifying part is provided so as to be able to shift the timing of separating from the lower surface of the rear end when the muddy water flowing on the lower surface reaches the rear end. An agricultural working machine characterized by: relates to.

[0010] This invention further provides: The rear end part of the rectifying part is formed in a waveform. An agricultural working machine characterized by: relates to.

[0011] This invention further provides: The rear end part of the rectifying part is formed in a mountain shape. An agricultural working machine characterized by: relates to.

[0012] This invention further provides: A single protruding part is formed at the rear end part of the rectifying part. An agricultural working machine characterized by: relates to.

[0013] This invention further provides: The rectifying part is configured to be bent horizontally with respect to the ground. An agricultural working machine characterized by: relates to.

[0014] This invention further provides: The rectifying part is configured to be bent substantially at a right angle with respect to the soil accumulation surface. An agricultural working machine characterized by: relates to.

Effects of the Invention

[0015] The purpose of this invention is to provide an agricultural implement having a soil-piling body that can improve the soil-piling effect. [Brief explanation of the drawing]

[0016] [Figure 1] This is a front view of a puddling machine according to an embodiment of the present invention. It shows the entire machine as viewed from the front in the direction of travel. The side workpieces are in the unfolded state. [Figure 2] This is a plan view of a puddling machine according to an embodiment of the present invention. It shows the overall plan view of the puddling machine. The side workpiece is in the unfolded state. [Figure 3] This is an overall side view of a puddling machine according to an embodiment of the present invention, as seen from the left in the direction of travel. The side workpiece is in the unfolded state. [Figure 4] This is an enlarged front view of the soil-piling body of a puddling machine according to an embodiment of the present invention. The illustration shows the machine positioned to the left in the direction of travel relative to the track. [Figure 5] This is an enlarged side view of the soil-piling body of a puddling machine according to an embodiment of the present invention. The figure shows a soil-piling body positioned to the left in the direction of travel relative to the track. [Figure 6] This is an enlarged plan view of the soil-piling body of a puddling machine according to an embodiment of this invention. The figure shows the soil-piling body positioned to the left of the track. [Figure 7] This is a cross-sectional bottom view of the soil-piling body of a puddling machine according to an embodiment of the present invention. In particular, the pivot axis, cover member, and fixing device are shown. The figure shows the soil-piling body positioned on the left side of the track. [Figure 8] This is an enlarged rear view of the soil-piling body of a puddling machine according to an embodiment of this invention. In particular, the fixing device is shown. [Figure 9] This is a side view of the soil-piling body of a puddling machine according to an embodiment of the present invention, viewed from a direction parallel to the soil-piling surface. The figure shows a soil-piling body positioned on the left side of the machine. [Figure 10] This is a cross-sectional view of the soil-piling body of a puddling machine according to an embodiment of this invention. The view is a cross-section taken in the left-right direction at the center of the pivot axis. The soil-piling body is not shown. The figure shows the soil-piling body positioned on the left side of the machine. [Figure 11] This is a plan cross-sectional view of a puddling machine according to an embodiment of the present invention. The cover member is shown in a plan view. It represents a state in which the machine is fixed by a fixing member, and the load on the soil-piling plate is small. The figure shows a soil-piling body positioned on the left side of the machine. [Figure 12] This is a plan cross-sectional view of a puddling machine according to an embodiment of the present invention. The cover member is shown in a plan view. The view shows the machine in a fixed state by the fixing member, indicating a heavy load on the soil-piling plate. The figure shows a soil-piling body positioned on the left side of the machine. [Figure 13] This is a plan view showing an example of a flow straightening section provided on the soil mounding body of a puddling machine according to an embodiment of this invention. The flow straightening section is shown in a straight line shape. The figure shows a soil mounding body positioned to the left in the direction of travel with respect to the track. [Figure 14] This is a plan view showing another embodiment of the flow straightening section provided on the soil mounding body of a puddling machine according to an embodiment of the present invention. The flow straightening section has a wave shape. The figure shows a soil mounding body positioned to the left in the direction of travel with respect to the track. [Figure 15] This is a plan view showing another embodiment of the flow straightening section provided on the soil mounding body of a puddling machine according to an embodiment of this invention. The flow straightening section has a mountain-like shape. The figure shows a soil mounding body positioned to the left in the direction of travel with respect to the track. [Figure 16] This is a cross-sectional view of an example in which the soil-piling body of a puddling machine according to an embodiment of this invention is attached to a cover body. The cover and the pivot shaft are fixed in the intermediate hole. [Modes for carrying out the invention]

[0017] A puddling machine according to an embodiment of this invention will be described with reference to the drawings. Item 1 is a puddling machine. 11 is the central work unit. The central work unit 11 is located in the center of the puddling machine 1 and performs the puddling work. 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. The side workpiece is formed by the right extension workpiece 11R and the left extension workpiece 11L.

[0018] 2 is the frame. Frame 2 has a pipe frame 22. The pipe frame 22 is the frame that forms the skeleton of the puddling work machine 1. The pipe frame 22 consists of a first pipe frame 221 and a second pipe frame 222. A long second pipe frame 222 is positioned in front of the first pipe frame 221, which is pipe frame 22, between the support frames 24. The second pipe frame 222, together with the first pipe frame 221, supports the mounting section 20 and the gear shift section (not shown), as well as the central work body 11 and the side work bodies, which are the right extension work body 11R and the left extension work body 11L.

[0019] The second pipe frame 222 according to this embodiment of the invention is made of square pipes with a rectangular cross-section. As shown in Figures 4 to 8 and 10, the lower surface of the second pipe frame 222 made of square pipes may be referred to as the first surface 222A, the upper surface as the second surface 222B, the front surface in the direction of travel as the third surface 222C, and the rear surface in the direction of travel as the fourth surface 222D.

[0020] The side work units, consisting of the right extension work unit 11R and the left extension work unit 11L, are equipped with a side pipe frame 223 and a side transmission case 231. Power is transmitted to the soil-crushing sections 3R and 3L of the side work units (right extension work unit 11R and left extension work unit 11L) via the side pipe frame 223 and the side transmission case 231 by the engagement of a dog clutch 33 located on the side of the upper part of the transmission case 23 of the central work unit 11.

[0021] 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 puddling machine 1.

[0022] 21 is the input case, and 211 is the input shaft. The input shaft 211 is mounted inside the input case 21 and connected to the tractor's PTO shaft to extract the tractor's driving force. 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 a lower plate. The lower plate 213 is attached to the pipe frame 22. A lower link pin 202 is attached to the tip of the lower plate 213. The lower plate 213 may also be attached to the second pipe frame 222, as shown in Figures 1 and 2. 23 is a transmission case. The transmission case 23 is mounted on the pipe frame 22 and outputs the driving force from the input shaft 211 mounted on the input case 21.

[0023] 24 is a support frame. The support frame 24 is positioned symmetrically with respect to the input case 21 and holds the rotor shaft 31, which will be described later, below the pipe frame 22. In this embodiment, the transmission case 23 is located on the support frame 24 on the left side in the direction of travel, which is one end of the pipe frame 22 of the central workpiece 11. 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 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 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.

[0024] 3 is the soil-crushing section. The soil-crushing section 3 is located below the frame 2 and is rotatable, and it crushes the soil in the field. The soil-crushing section 3 is installed on the puddling implement 1, which is mounted on the rear of the 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 section 3 are rotated to crush the soil. The soil-crushing section 3 rotates the tilling tines 32 as the traveling machine moves forward 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.

[0025] 31 is the rotor shaft. The rotor shaft 31 is a rotating shaft stretched across the lower part of each of the support frames 24 and rotates with 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 extension workpiece 11L, which is on the left side in the direction of travel of the rotor shaft 31. 31R is the right extension rotor shaft. The right extension rotor shaft 31R is located on the right extension soil crushing section 3R, which is on the right side in the direction of travel of the rotor shaft 31. The left extension rotor shaft 31L and the right extension rotor shaft 31R are rotated by the driving force from the side transmission case 231.

[0026] 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.

[0027] 33 is a dog clutch. The dog clutch 33 consists of a central dog clutch (not shown), an extended left dog clutch (not shown), and an extended right dog clutch (not shown). The central dog clutch is provided near the transmission case 23 and support frame 24 at both ends of the first pipe frame 221. The left extension of the dog clutch is located on the right side in the direction of travel of the left extension of the soil crushing section 3L, and engages with the central side of the dog clutch to form the left side of the dog clutch in the direction of travel. The right extension of the dog clutch is located on the left side of the left 3R extension of the soil crushing section, and engages with the central dog clutch to form the right-side dog clutch in the direction of travel. The dog clutch 33 switches the rotational drive of the left 31L and right 31R extension rotor shafts on and off.

[0028] 34 is a retaining part. The retaining part 34 is the bearing part of the rotor shaft 31 and is provided at the lower part of the transmission case 23 and the support frame 24. The holding part 34 is located behind the third soil mounding body (not shown) and holds the rotation axis of the soil crushing part 3. The holding part 34 is attached to the lower part of the transmission case 23 and the support frame 24, respectively. 34L is the left extension retaining part. The left extension retaining part 34L is the bearing part of the rotor shaft 31L and is located at the bottom of the left 4L of the cover body, which will be described later. 34R is the right extension retaining part. The right extension retaining part 34R is the bearing part of the rotor shaft 31R and is located at the bottom of the right 4R of the cover body, which will be described later. The retaining portion 34, the left extension retaining portion 34L, and the right extension retaining portion 34R each have bearings and oil seals inside.

[0029] 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 3L. 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.

[0030] 41L is the left pivot frame. The left pivot frame 41L is an upper protruding member for rotatably attaching the left extension work body 11L of the puddling work machine 1 to the pivot part 25, and is an arm integrated with the side pipe frame 223. 41R is the right pivot frame. The right pivot frame 41R is an upper protruding member for rotatably attaching the right extension work body 11R of the puddling work machine 1 to the pivot part 25, and is an arm integrated with the side pipe frame 223.

[0031] The soil-piling structure consists of a first soil-piling structure 42, a second soil-piling structure 43, and a third soil-piling structure (not shown), and is positioned on the front side in the direction of travel of the soil-crushing section 3. The soil-piling structure is capable of moving soil into the tracks formed by the traveling machine, thereby erasing the tracks. The soil-relieving body is installed on the second pipe frame 222, which is a long body located at the rear of the traveling machine. Furthermore, soil-relieving bodies can also be installed on the cover body 4, the left cover body 4L, the right cover body 4R, the support frame 24, the transmission case 23, and the side transmission case 231. The soil-piling bodies have soil-piling surfaces that can move soil toward the ruts. Of the soil-piling bodies (first soil-piling body 42, second soil-piling body 43, and third soil-piling body (not shown)), the second soil-piling body 43 has a soil-piling surface 431 that moves soil laterally in the direction of travel. The first soil-piling body 42 and the third soil-piling body (not shown) also have soil-piling surfaces (not shown). The soil-piling body can rotate horizontally on the pivot axis 61, making it possible to change its projected area as viewed from the direction of travel. In this embodiment of the invention, it is adapted to the second soil pile 43 located on the outer side of the running track relative to the width of the running machine, but it may also be adapted to the first soil pile 42 located on the central side of the running track relative to the width of the running machine.

[0032] The first soil mounding body 42 is located in front of the soil crushing section 3 and below the cover body 4, and the surface positioned on one side of the width of a single rut formed in the field by the moving machine is inclined towards the rear as it moves outward relative to the width of the machine. The first soil mounding unit 42 is installed on the central side of the puddling machine 1.

[0033] The second soil-piling body 43 is located in front of the soil-crushing section 3 and below the cover body 4, and the surface positioned on the other side of the rut is inclined towards the rear as it moves inward relative to the width of the puddling work machine 1, which is the width of the machine body. The second soil mounding body 43 is installed on the end side of the cover body 4, which is further out than the width of the puddling machine 1 than the first soil mounding body 42. The first soil mounding body 42 and the second soil mounding body 43 are installed facing each other, with the width of a single rut formed in the field by the moving machine, which is the puddling work machine 1.

[0034] 42b is a support member that supports the first soil mound 42. The support member 42b of the first soil mound 42 is a member for attaching the first soil mound 42 to the puddling work machine 1, and is a member that is positioned and fixed so as to hang downward from the lower plate 213. The lower part of the support member 42b is located below the lower end of the cover body 4, and the first soil mound 42 is attached to the lower part of this support member 42b. 43b is a support member that supports the second soil mound 43. The support member 43b of the second soil mound 43 is a member for attaching the second soil mound 43 to the puddling work machine 1, and is also called a pivot shaft 61. The pivot shaft 61, which is the support member 43b, is a member that hangs down from each of the two ends of the front part of the cover body 4. The lower part of the support member 43b is located below the lower end of the cover body 4, and the second soil mound 43 is attached to the lower part of this support member 43b.

[0035] A third soil-piling body (not shown) 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 its outer surfaces on the left and right sides relative to the direction of travel are inclined towards the rear as they move inward relative to the width of the puddling work machine 1, which is the width of the machine body. The third soil mounding body (not shown) is located at the end of the cover body 4 of the puddling machine 1 and is installed on the outside in the direction of travel of the second soil mounding body 43. The first soil mounding body 42, the second soil mounding body 43, and the third soil mounding body (not shown) are installed facing each other, with the width of a single rut formed in the field by the puddling work machine 1, which is a mobile machine, in between.

[0036] As shown in Figure 2, a plan view, and Figure 3, a side view from the left side in the direction of travel, the front end of the first soil mound 42 is located behind the front end of the second soil mound 43. The second soil mound 43 protrudes further in the direction of travel than the first soil mound 42. Ideally, the first soil mound 42 should protrude in the direction of travel for better backfilling effect, but the first soil mound 42 is positioned so as not to protrude in the direction of travel in order to avoid contact with the tractor's tires or crawler when the three-point linkage moves up and down.

[0037] The front end of the third mound (not shown) is positioned behind the front end of the first mound 42. The third mound is positioned somewhat behind the second mound 43 to capture the flow of soil overflowing from the second mound 43. If the third mound is positioned too far forward of the second mound 43, the distance between the second mound 43 and the third mound will become too narrow, hindering the flow of soil passing through this space.

[0038] The front ends of the first soil-reducing body 42, the second soil-reducing body 43, and the third soil-reducing body each protrude forward from the front end of the cover body 4. The first soil-reducing body 42 is positioned near the center of the cover body 4 in the width direction of the machine body, while the second soil-reducing body 43 and the third soil-reducing body are positioned at the ends of the cover body 4 in the width direction of the machine body. Therefore, the flow of the soil can be determined and the soil can be sent to the rut in advance before the soil reaches the crushed soil section 3 located behind the front end of the cover body 4.

[0039] 5 is a land leveling unit. The land leveling unit 5 is attached to the rear of the cover unit 4 at the rear of the puddling machine 1 in the direction of travel during operation. It levels the field as it moves forward. 5L is the left leveling unit. The left leveling unit 5L is attached to the rear of the left cover unit 4L and constitutes the left end of the leveling unit 5 in the direction of travel during operation. 5R is the right leveling body. The right leveling body 5R is attached to the rear of the right cover body 4R and constitutes the right end of the leveling body 5 in the direction of travel during operation. 52 is a hinge. The hinge 52 is attached to the leveling body 5 as a pivot point that allows it to rotate up and down relative to the cover body 4, the left cover body 4L, and the right cover body 4R.

[0040] The rotation mechanism for the soil mounding bodies (first soil mounding body 42, second soil mounding body 43, and third soil mounding body (not shown)) will be described. In the embodiment described, the rotation mechanism will be provided to the second soil mounding body 43. The pivot shaft 61 allows the second soil-piling body 43 to rotate horizontally. The pivot shaft 61 is made up of a pipe or rod shape and is positioned vertically. The pivot shaft 61 is held by holding members 65, which are pivot bosses provided at two locations, upper and lower, allowing it to rotate freely and move along the axial axis.

[0041] In this embodiment of the invention, the positional relationship between the pivot axis 61 and the second soil pile 43 in the left-right direction is such that the pivot axis 61 is located at the rut-side end of the second soil pile 43. Due to the structure in which the pivot axis 61 is located at the rut-side end of the soil pile, when a load is applied, the pivot direction will always be in one direction. The pivot axis 61 may also be located in the middle of the left-right width direction of the second soil pile 43, or at the rut-side end away from the rut. In the illustrated embodiment of this invention, the work machine body has a central work unit 11 and side work units (extension work unit right 11R, extension work unit left 11L), and the work machine 1, which has side work units that can be stored and extended, will be used for the explanation, but the invention is also applicable to a work machine that consists only of a central work unit 11.

[0042] The pivot axis 61 is provided with a cover member 63 positioned between the holding members 65. As shown in Figures 4 and below, the cover member 63 is a box-shaped member capable of covering the periphery of the elastic member 62, which will be described later. Inside the cover member 63, there is a space between it and the pivot axis 61 that is capable of covering the elastic member 62. The cover member 63 is also provided so as to be rotatable relative to the pivot axis 61, and is provided so as not to be able to move up and down by a holding member 65. As shown in Figures 5 and below, the cover member 63 has a restricting portion 64. The restricting portion 64 is located on the pivot axis 61 of the soil mounding body (first soil mounding body 42, second soil mounding body 43 and third soil mounding body (not shown)). Restrict the movement of those around you. The cover member 63 is provided with a boss portion 68 at its upper part into which the pivot shaft 61 is inserted, and the boss portion 68 has a hole 74a that penetrates in a direction perpendicular to the direction of the pivot shaft 61. The pivot shaft 61 also has a hole 74b, and by inserting and removing a pin-shaped fixing member 69 so as to pass through these holes 74a and 74b, the cover member 63 and the pivot shaft 61 can be fixed and released as a single unit. In the fixed state, the pivot shaft 61 cannot move in the vertical direction, and when the fixing is released, the pivot shaft 61 becomes movable in the vertical direction relative to the holding member 65 and the cover member 63. By passing the fixing member 69 through the respective holes 74a and 74b, the pivot shaft 61 and the boss portion 68 are fixed together, making it impossible for the pivot shaft 61 to move up and down relative to the fixing member 69. The pivot shaft 61 and cover member 63, which are fixed together, can rotate relative to the holding member 65 within the limits of the rotation range imposed by the restricting portion 64.

[0043] On the other hand, by pulling out and removing the fixing member 69, the pivot shaft 61 and the boss portion 68 are released, allowing the pivot shaft 61 to move up and down relative to the fixing member 69. In addition, in the released state, the pivot shaft 61 and the cover member 63 can each move independently relative to the holding member 65. The cover member 63 can move by rotation within the range of rotation limited by the restricting portion 64. The pivot axis 61, which is fixed by the fixing member 69, can rotate within the rotation range formed by the first restricting section 641 and the second restricting section 642. In other words, the second soil mounding body 43, which is fixed, can rotate within the rotation range formed by the restricting section 64.

[0044] On the other hand, the pivot axis 61, when released from fixation by the fixing member 69, can pivot relative to the cover member 63 and the holding member 65, regardless of the pivot range formed by the first restricting portion 641 and the second restricting portion 642. In other words, the second soil mounding body 43, when released from fixation, can pivot freely around the pivot axis 61 by the restricting portion 64. The pivot shaft 61, which is fixed by the fixing member 69, is biased by the elastic member 62 to pivot in one direction. In the fixed state in this embodiment, the soil-piling surface 431 of the second soil-piling body 43, which is positioned at the lower end of the pivot shaft 61, is biased to pivot in a direction along the direction of travel. The second soil-piling body 43 then moves forward with at least the lower end of the soil-piling surface 431 buried in the mud.

[0045] The cover member 63 is integrally fixed to the pivot shaft 61 by inserting the fixing member 69 into the cover member 63 and the pivot shaft 61, making it impossible for the second soil pile 43 to move relative to the pivot shaft 61 in the axial direction and circumferential direction of the pivot shaft 61. By pulling the fixing member 69 out from the cover member 63 and the pivot shaft 61, the fixation between the cover member 63 and the pivot shaft 61 is released, making it possible to move relative to the pivot shaft 61 in the axial direction and circumferential direction of the pivot shaft 61.

[0046] The cover member 63 is provided so as to be movable to a position other than the axis of the pivot shaft 61 after the pivot shaft 61 has been withdrawn from the cover member 63. A cover member 63 is provided between the bosses of the retaining member 65. A cylindrical boss portion 68 (different from the bosses of the retaining member 65) is provided on the upper part of the cover member 63, and a pivot shaft 61 is provided so as to be insertable into the boss portion 68.

[0047] Let me explain the elastic member 62. An elastic member 62 is provided in the space within the cover member 63, constantly biasing the second soil mound 43 in one direction around the pivot axis 61. As a result, the second soil mound 43 rotates around the pivot axis 61 depending on the strength of the load it receives from the soil as it moves. In this embodiment, a coil spring is used as the elastic member 62. The coil portion of the coil spring is passed through the pivot shaft 61, and one arm portion 621 is positioned to contact a contact portion 67 provided on the third surface 222C side of the second pipe frame 222, while the other arm portion 621 is positioned to contact the inner wall surface of the cover member 63. With this configuration, the cover member 63 is constantly biased in one direction. The ends of the coil spring arms 621 are formed in a hook shape to prevent the cover member 63 and the contact portion 67 from receiving locally concentrated repulsive force from the elastic member 62.

[0048] As shown in the embodiment, by using a coil spring for the elastic member 62, the area around the pivot axis 61 can be made compact. In the embodiment, a coil spring was used for the elastic member 62, but there are no limitations on the form of the elastic member 62; it is sufficient that the cover member 63 or the boss of the cover member 63 can be constantly biased in one direction relative to the pivot axis 61. Since the elastic member 62 is covered by the cover member 63, it is possible to prevent foreign matter from flying off and adhering to it. As a result, the elastic member 62 can provide a stable biasing force to the cover member 63 without being affected by foreign matter.

[0049] The boss portion 68 has a hole 74a through it, perpendicular to the axis, for inserting a fixing member 69. The pivot shaft 61 also has a hole 74b through it, perpendicular to the axis, for inserting a fixing member 69 (described later). The fixing member 69 is used to prevent vertical movement of the pivot shaft 61.

[0050] The retaining member 65 will now be described. The cover member 63 is positioned to sandwich the pivot shaft 61 from above and below, and a holding member 65 is provided to hold the pivot shaft 61 so that it can move in the circumferential and axial directions. The holding member 65 is a member whose position can be fixed relative to the second pipe frame 222, and can support the pivot shaft 61 so that it can rotate or pivot on the front side of the second pipe frame 222. The holding member 65, which is a pivot boss, supports the pivot shaft 61 at two locations, above and below, with a gap between them, thereby reducing the contact area and preventing an increase in friction with the pivot shaft 61 during rotation, while allowing the pivot shaft 61 to pivot. It can be firmly supported without wobbling along the line. In other words, the second soil-piling body 43 positioned at the lower end of the pivot axis 61 can be stably positioned below the pivot axis 61 and can also stably pivot around the pivot axis 61. The rear of the holding member 65 is provided with a contact portion 67 that can be contacted by a restricting portion 64, thereby restricting the pivot movement of the cover member 63.

[0051] The fitting portion 66 will now be described. In this embodiment, the fitting portion 66 is provided on the second soil mound 43. The soil mounds (first soil mound 42, second soil mound 43, and third soil mound (not shown)) are elongated bodies and are equipped with fitting portions 66 that are movable in the left-right direction relative to the direction of travel relative to the second pipe frame 222. The fitting portions 66 have a U-shaped cross-section with the rear side open. The fitting portion 66 has a retaining member 65 for attaching the second soil mound 43 so that it can move in the vertical direction. In this embodiment, the retaining member 65 is positioned on the front side in the direction of travel of the fitting portion 66. The retaining member 65 is connected to a U-shaped fitting portion 66 with an open rear end. The fitting portion 66 fits onto the second pipe frame 222, which is a long body oriented in the left-right direction relative to the direction of travel, and is also movable in the long direction. A fixing device 71 is attached to the rear side of the fitting portion 66 to fix it to the long body so that it cannot move. The retaining member 65 is positioned vertically and spaced apart, and has a boss positioned in front of the fitting portion 66. The boss is integrally fixed with the fitting portion 66. The pivot shaft 61 can be inserted into the boss, and when inserted, it can pivot relative to the boss and is provided to be movable along the same axis as the boss.

[0052] The perimeter of the elongated second pipe frame 222, when its longitudinal direction is considered as the axis, is covered by the fitting portion 66, as shown in Figures 4 to 8 and 10. This covers the first surface 222A, which is the lower surface of the second pipe frame 222 made of square pipes, the second surface 222B, which is the upper surface, and the third surface 222C, which is the front surface in the direction of travel. The fitting portion 66 is provided with a contact portion 67 on the forward side in the direction of travel, which is capable of contacting the restricting portion 64.

[0053] I will now explain the regulatory section 64. The cover member 63 is provided with a restricting portion 64 that can contact a contact portion 67 provided between the holding members 65, thereby limiting the rotation range of the second soil mounding body 43 around the rotation axis 61 when the cover member 63 and the pivot axis 61 are fixed together. A restricting portion 64 is provided on the cover member 63 located in front of the fitting portion 66. The restricting portion 64 is provided so as to be able to contact a contact portion 67 formed on the front surface of the fitting portion 66. The restricting portion 64 has a first restricting portion 641 that restricts the cover member 63 from rotating in one direction, and a second restricting portion 642 that restricts the cover member 63 from rotating in the other direction. In other words, the first restricting portion 641 restricts rotation in one direction, which is the direction in which the soil mound 43 rotates when the load it receives is small, and the second restricting portion 642 restricts rotation in the other direction, which is the direction in which the soil mound 43 rotates when the load it receives is large. When the pivot shaft 61 is inserted into the boss portion 68, the cover member 63 can rotate within the range of the first restricting portion 641 that contacts the contact portion 67 and the second restricting portion 642 that contacts the contact portion 67. The first restricting portion 641 and the second restricting portion 642 restrict rotation by contacting the contact portion 67 located behind the holding member 65. The cover member 63 can rotate around the pivot axis 61 within the rotation range formed by the first restricting portion 641 and the second restricting portion 642. In the embodiment, the second soil mound 43 is described as being equipped with the above-described rotation mechanism, but it may also be equipped in the first soil mound 42 or the third soil mound (not shown). Also, in the embodiment, the second soil mound 43 is described as being equipped with the above-described fitting portion 66, but it may also be equipped in the first soil mound 42 or the third soil mound (not shown).

[0054] A flow straightening section 432 is provided at the lower part of the mounding body. In this embodiment, it will be described as being provided on the second mounding body 43. The flow straightening section 432 is provided so as to be continuous from the lower end of the soil-piling surface 431, which is the surface on which the second soil-piling body 43 moves soil laterally, towards the rear. The flow straightening section 432 is a plate-shaped member and is provided so that mud can pass below the flow straightening section 432.

[0055] A guide surface 433 is provided on the lower surface of the straightening section 432 to straighten the flow of soil below the soil mounding surface 431 and to guide the mud. The guide surface 433 is provided horizontally to the ground, and the flow straightening section 432 is provided continuously from the lower end of the soil mounding surface 431. In other words, the soil mounding surface 431 and the guide surface 433 are provided continuously. In this embodiment, the flow straightening section 432 is provided so as to bend the guide surface 433 backward at approximately a right angle to the soil mounding surface 431. The guide surface 433 is provided perpendicular to the soil mounding surface 431 and horizontally. Since the soil mounding surface 431 and the guide surface 433 are formed continuously, they do not create irregularities that would cause mudflow to stagnate, thus guiding the mudflow passing beneath the soil mounding surface 431 backward without unnecessarily disturbing it. Furthermore, there are no limitations on the bending radius or the number of folds when forming the guide surface 433; it is sufficient that the rear end of the guide surface 433 faces backward.

[0056] The flow straightening section 432 prevents the mudflow passing beneath the second mound 43 from becoming turbulent. Without the flow straightening section 432, the mudflow passing beneath the mound may become turbulent, causing the mud to undulate significantly behind the mound. This turbulence can erode the mud behind the mound, potentially reducing the leveling performance of the mound. The flow straightening section 432 suppresses the turbulence of the mudflow passing beneath the mound. In other words, it suppresses the undulation of the mud behind the mound, thus improving the leveling performance of the second mound 43. The flow straightening section 432 is provided with a guide surface 433 that has a guide distance L extending from the front soil mounding surface 431 to the rear, and the rear end of the flow straightening section 432, which is the rear end of the guide distance L, is provided so as to reach the front part of the soil crushing section 3. Along the lower surface of the guide surface 433 that has a guide distance L, muddy water flows from the front in the direction of travel. By passing backward, the undulation of the mud is suppressed, and the flow becomes even more stable. Note that the guided distance L is not limited to that shown in the diagram, and can be freely changed according to the soil type, usage conditions, and environment.

[0057] As shown in Figure 13, the rear end of the flow straightening section 432 in this embodiment is provided in a straight line in plan view, but this is not a limitation. As shown in Figures 14 and 15, which represent other embodiments, the rear end can be formed into a wave-like or mountain-like shape, which allows the timing at which the muddy water flowing on the underside of the flow straightening section 432 separates from the underside of the rear end when it reaches the rear end of the flow straightening section 432 to be staggered. As shown in Figures 14 and 15, by forming the rear end into a wave-like or mountain-like shape, the muddy soil is formed to gradually separate from the valley portion that is recessed on the front side to the mountain portion that protrudes on the rear side relative to the front and rear, thus preventing mudflow This further improves the ability to regulate the flow of muddy water without disturbing it. Furthermore, although Figures 14 and 15 illustrate the design with multiple wave-shaped or mountain-shaped protrusions, the effect remains the same even with a single wave-shaped or mountain-shaped protrusion. In the embodiment, the flow straightening section 432 was described as being provided on the second mounding body 43, but it may also be provided on the first mounding body 42 or the third mounding body (not shown). In this case, the mudflow passing below the mounding body will be further straightened, and an improvement in leveling performance after passing through the mounding body can be expected.

[0058] Let's further explain the elongated second pipe frame 222. The second pipe frame 222 in this embodiment is made up of square pipes with a rectangular cross-section. Since the elongated body has a rectangular cross-section, fixing the fastener 71 and the fitting portion 66 with the fastening member 70 prevents movement of the elongated body in the circumferential direction with respect to its longitudinal axis. As described above, since it is fixed to the long body, the position of the soil-piling body (second soil-piling body 43) is fixed in all directions (front, back, left, right, up, and down) relative to the soil-crushing section 3, so that soil-piling work by the soil-piling body (second soil-piling body 43) can be performed stably. In the illustration, the second soil-piling body 43 is shown attached to the second pipe frame 222, but the first soil-piling body 42 and the third soil-piling body (not shown) can also be installed on the second pipe frame 222.

[0059] Let me explain the fastener 71. The soil-piling body is equipped with a fastener 71 that allows the fitting portion 66 to be fixed to and released from the elongated body. The fastener 71 is provided wide in the longitudinal direction of the elongated body. The fastener 71 is located on the fourth surface 222D of the second pipe frame 222, which is made of square pipe. The fitting portion 66 covers the other surfaces of the second pipe frame 222, namely the first surface 222A, the second surface 222B, and the third surface 222C. The fastener 71 is a plate-shaped member and is provided so as to be in contact with the fourth surface 222D. The lower end of the fastener 71 is bent toward the third surface 222C, and the bent tip reaches below the first surface 222A. The fastener 71 is designed so that a locking portion 72 on one of its lower sides hooks onto the upper projection 73 at the bottom of the fitting portion 66, and the other upper side is fastened with a fastening member 70 located at the top of the fitting portion 66. In other words, since the fastening members 70 are concentrated on the second surface 222B side, which is the upper part of the second pipe frame 222, it is easy for a worker's hands or tools to access the fastening members 70 from the third surface 222C side via the second surface 222B side.

[0060] The gap 75 provided between the fitting portion 66 and the fastener 71 will now be described. A small gap 75 is provided between the fitting portion 66 on the second surface 222B side and the fastener 71. By providing this gap 75, the gap 75 is reduced when the fitting portion 66 and the fastener 71 are tightened and fixed with the fastening member 70. In other words, the fastener 71 and the fitting portion 66 flex slightly so that they move closer to each other. With this configuration, the third surface 222C and the fourth surface 222D are strongly sandwiched between the fitting portion 66 and the fastener 71. Consequently, the friction between the fitting portion 66 and the fastener 71 that are in contact with the elongated second pipe frame 222 increases, and as a result, the fitting portion 66 becomes unable to move in the longitudinal direction of the elongated second pipe frame 222, and the soil mound also becomes unable to move in the longitudinal direction of the elongated second pipe frame 222. The fastener 71 and the fitting portion 66 are provided with a wide width in the longitudinal direction of the elongated body. Therefore, when the fitting portion 66 and the fastener 71 are tightly fixed together, localized pressure on the elongated body's second pipe frame 222 can be avoided, and damage to the elongated body can be prevented. At the same time, the wide width increases friction with the elongated body, allowing for even more integrated fixing with the elongated body.

[0061] The protruding portion 73 will now be described. A projection 73 is provided at the lower part of the fitting portion 66, protruding downward from the fitting portion 66. The projection 73 is located in the middle of the front-to-back direction on the first surface 222A side of the elongated second pipe frame 222. In addition, multiple projections 73 are provided at intervals along the longitudinal direction of the elongated body. In this embodiment, two projections 73 are provided at the left and right ends in the direction of travel, and each is formed by bending the rear end of the fitting portion 66, which is made of a plate-like member, downward.

[0062] The locking portion 72 will now be explained. The locking portion 72 located on the first surface 222A side of the elongated body of the fastener 71 is a rod-shaped member that can be locked onto a projection 73 provided on the fitting portion 66. The locking portion 72 is provided extending from the lower end of the fastener 71 toward the projection 73. By locking the locking portion 72 onto the front surface of the projection 73, the movement of the fastener 71 toward the fourth surface 222D side, that is, toward the rear in the direction of travel, is restricted. The fastener 71 is positioned so that the locking portion 72 extends upward from between the projections 73, and the upper part is fixed with a fastening member 70, thereby becoming one with the fitting portion 66. The joint 66 can be fixed to the elongated body simply by locking one end with the locking portion 72 and fastening the other end.

[0063] The fastening member 70 will now be described. The fastening member 70 is located on the second surface 222B side of the elongated second pipe frame 222, and by fixing it together with the fitting portion 66, it prevents the soil mound (second soil mound 43) from moving relative to the elongated second pipe frame 222. The fastening member 70 is positioned offset from the holding member 65 in the longitudinal direction of the elongated second pipe frame 222.

[0064] The fastening member 70 at the top of the fastener 71 is located on the second surface 222B side, and the fitting portion 66 and the fastener 71 are fixed together by passing through the fitting portion 66 and the hole provided in the fastener 71. In this embodiment, the fastening member 70 is a bolt and a nut. In this embodiment, the fastening member 70 is provided at two locations spaced apart in the longitudinal direction of the elongated second pipe frame 222, but there is no limit to the number. The fastening member 70 is positioned to the side of the retaining member 65 that holds the pivot axis of the soil mound when viewed from the front in the direction of travel (i.e., from the third surface 222C side). Therefore, the pivot axis 61 and retaining member 65 do not get in the way when accessing the fastening member 70 from the third surface 222C side, further improving ease of assembly and maintenance.

[0065] The operation of the soil mounding bodies (first soil mounding body 42, second soil mounding body 43, and third soil mounding body (not shown)) will be explained. Here, the explanation will assume that the second soil mounding body 43 is equipped with a rotation mechanism. As the second soil mound 43 moves, it receives a load such that the side opposite to the mounting position of the pivot shaft 61 is pressed backward in the direction of travel. In other words, as the second soil mound 43 receives a load from the mud as it moves, the pivot shaft 61 receives a force that causes it to rotate in the opposite direction to the direction in which it receives biasing force from the elastic member 62. As the speed increases, the resistance from the mud increases, and eventually, when the load on the rear side of the soil mound exceeds the biasing force of the elastic member 62, the second soil mound 43 rotates backward with the pivot shaft 61 as the fulcrum.

[0066] The load on the rear side of the mounding body changes depending on the amount of burial of the second mounding body 43 in the mud, the speed of movement, and the viscosity of the mud. Therefore, the worker can adjust the load on the rear side of the second mounding body 43 by changing the relative height of the mounding surface 431 with respect to the crushed soil section 3. The height of the mounding surface 431 is adjusted by removing the fixing member 69 from the boss section 68 and the pivot shaft 61. When the fixing member 69 is removed, the pivot shaft 61 can move up and down relative to the holding member 65. The pivot shaft 61 has holes 74b spaced apart at multiple locations, so the desired rotation can be adjusted. The height of the soil mound can be changed by aligning the hole 74a of the boss portion 68 with the hole 74b of the rotating shaft 61 and inserting the fixing member 69.

[0067] The soil mound, fixed to the pivot axis 61 by the fixing member 69, has its pivot range limited by the restricting part 64. While constantly biased in one direction around the pivot axis 61 by the elastic member 62, pivoting in that direction is restricted by the first restricting part 641. Therefore, in the absence of a load from mud, the angle of the soil mound surface 431 can be maintained constant. Furthermore, even if it pivots in the other direction due to a load from mud, pivoting in that direction is restricted by the second restricting part 642. Therefore, even when subjected to a load from mud, the soil mound does not continue to pivot. Since there is no risk of soil being kicked up, the soil-piling effect on the soil-piling surface 431 can be maintained.

[0068] Let me explain the tracks (ruts) left by the vehicle. As the speed of the machine increases, the tracks left by the machine are pushed further to the side of the machine's running section. In other words, as the speed of the machine increases, the mud moves with momentum further away from its original location. In order to return this moved mud to its original position, in this embodiment, as the working speed increases, the second soil pile 43 is designed so that its projected area as viewed from the direction of travel increases due to the load from the speed of the mud's movement. In other words, as the working speed increases, the side to which the pivot shaft 61 is attached and the pivot shaft 61 are attached increase as viewed from the direction of travel. The distance between the side to which it is attached and the opposing side increases. Since the side to which the pivot axis 61 is attached and the opposing side can be positioned laterally to the pivot axis 61, the soil that has moved far away can be returned to its original position as a track (rut).

[0069] When the fixing member 69 is removed, the pivot shaft 61 can pivot independently of the boss portion 68 of the cover member 63 and the boss of the holding member 65. Even when the fixing member 69 is passed through the boss portion 68 and the hole 74 of the pivot shaft 61, the position can be freely adjusted in the axial direction, so the fixing member 69 can be easily passed through the hole 74.

[0070] Furthermore, when the pivot shaft 61 is inserted into the boss portion 68 and the fixing member 69 is removed, the cover member 63 rotates in one direction relative to the pivot shaft 61 due to the biasing force of the elastic member 62, but rotation in that direction is prevented by the restricting portion 64 (first restricting portion 641). Therefore, when adjusting the height of the soil mound, the hole 74 of the pivot shaft 61 and the hole 74 of the boss portion 68 can be easily aligned.

[0071] The cover member 63 can be easily moved to a location other than the axis of the pivot shaft 61 by pulling the pivot shaft 61 out of the boss portion 68. In other words, since the cover member 63 is positioned on the axis of the pivot shaft 61 and between the retaining members 65 simply by inserting the pivot shaft 61 into the boss portion 68, the cover member 63 can be easily removed from the retaining members 65 when the pivot shaft 61 is removed. This structure simplifies the configuration because it does not require an increase in fixing members or fastening members to position the cover member 63 between the retaining members 65. In this example, since the elastic member 62 is a coil spring, the elastic member 62 located inside the cover member 63 can also be removed at the same time, further improving ease of assembly and disassembly.

[0072] In this embodiment of the invention, the retaining member 65 and the soil pile are fixed in position relative to the soil pulverization section by fitting the fitting portion 66 to the second pipe frame 222. However, as shown in Figure 16, the retaining member 65 can also be directly fixed to the cover body 4 that covers the soil pulverization section 3. In this example, a mounting portion is provided at the rear of the retaining member 65 for attaching the retaining member 65 to the front surface of the cover body 4. The mounting portion may be permanently fixed to the cover body 4 by welding or the like, or it may be removable with fastening members such as bolts and nuts. With this configuration, rotation The soil-piling body, which rotates around the pivot axis 61, can be positioned in front of the soil-crushing section 3 and can also rotate around the pivot axis 61. Agricultural implements do not always have a second pipe frame 222. Even in such an configuration, the cover body 4 can fix the position of the soil mounding body relative to the soil crushing section 3. In this case, the fitting section 66 and the fixing device 71 can be omitted, and the soil mounding body can be constructed more simply. [Explanation of Symbols]

[0073] 1. Rice paddy tilling machine (traveling unit) 3 Crushing section 32 Cultivating Claw 42 First soil mounding body 42 43. Second soil mound (soil mound) 61 Swivel axis 62 Elastic members 63 Cover component 64 Regulatory Department 431 Soil mounding surface 432 Rectifier 433 Guide surface

Claims

1. A soil-piling body located behind the traveling machine, capable of moving soil into the tracks formed by the traveling machine to erase the tracks, It comprises a soil crushing section located behind the aforementioned soil mounding body, The aforementioned soil-piling body has a soil-piling surface that moves soil laterally in the direction of travel, The system comprises a flow straightening section formed continuously from the lower end of the soil mounding surface toward the rear, and having a guide surface whose rear end is oriented toward the rear so that mud flowing beneath the soil mounding surface can pass through, The guide surface has a guide distance that extends from the soil mounding surface to the vicinity of the front of the soil crushing section, thereby suppressing turbulence in the mudflow that is about to occur behind the soil mounding body as it passes below the soil mounding surface, and suppressing the undulation of the mud. A farming machine characterized by the following features.

2. A soil-piling body located behind the traveling machine, capable of moving soil into the tracks formed by the traveling machine to erase the tracks, It comprises a soil crushing section located behind the aforementioned soil mounding body, The aforementioned soil-piling body has a soil-piling surface that moves soil laterally in the direction of travel, The system comprises a flow straightening section formed continuously from the lower end of the soil mounding surface toward the rear, and having a guide surface whose rear end is oriented toward the rear so that mud flowing beneath the soil mounding surface can pass through, The guide surface has a guide distance that extends from the soil mounding surface to the vicinity of the front of the soil crushing section, thereby suppressing turbulence in the mudflow that would otherwise occur behind the soil mounding body as it passes beneath the soil mounding surface, and thereby suppressing erosion of the mud. A farming machine characterized by the following features.

3. A soil-piling body located behind the traveling machine, capable of moving soil into the tracks formed by the traveling machine to erase the tracks, It comprises a soil crushing section located behind the aforementioned soil mounding body, The aforementioned soil-piling body has a soil-piling surface that moves soil laterally in the direction of travel, The system comprises a flow straightening section formed continuously from the lower end of the soil mounding surface toward the rear, and having a guide surface whose rear end is oriented toward the rear so that mud flowing beneath the soil mounding surface can pass through, The guide surface has a guide distance that extends from the soil mounding surface to the vicinity of the front of the soil crushing section, thereby suppressing turbulence of the mudflow that is about to pass below the soil mounding surface and occur behind the soil mounding body, and suppressing the undulation and erosion of the mud. A farming machine characterized by the following features.

4. The flow straightening section is provided in such a way that it can stagger the timing at which the muddy water flowing on the lower surface separates from the lower surface of the rear end when it reaches the rear end. The agricultural implement according to any one of claims 1, 2, or 3.

5. The rear end of the rectifier section is formed into a waveform. The agricultural implement according to any one of claims 1, 2, or 3.

6. The rear end of the rectifier section is formed in a V-shape. The agricultural implement according to any one of claims 1, 2, or 3.

7. A single protrusion is formed at the rear end of the rectifier section. The agricultural implement according to any one of claims 1, 2, or 3.

8. The aforementioned rectifier section is constructed by bending it horizontally with respect to the ground. The agricultural implement according to feature 7.

9. The flow straightening section is constructed by bending it at approximately a right angle to the soil mounding surface. The agricultural implement according to feature 7.

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