Plowing machine

Abstract

To provide a puddling work machine which levels soil that has been roughly leveled in advance by a soil-collecting body with a soil-crushing part, thereby achieving a good finish state of puddling work. [Solution] This tillage machine is characterized by comprising: a soil crushing section 3 located behind the traveling body 1, which crushes the soil by rotating and driving the tilling tines 32 as the traveling body 1 moves forward; a soil piling body 42 located behind the traveling direction of the traveling body 1 and forward of the traveling direction of the soil crushing section 3, which is capable of moving soil into the tracks formed by the traveling body 1 to erase them; and a swivel shaft A which can rotate the soil piling body 42 horizontally, and the attachment position of the swivel shaft A to the soil piling body 42 is located at a position shifted to the side from the center of the left-right width of the soil piling body 42, thereby changing the area of ​​each surface of the soil piling body 42 that comes into contact with the soil on both sides of the swivel shaft A.

Description

[Technical field]

[0001] The present invention relates to a tilling machine, and more particularly to a tilling machine that uses a soil crushing section to level soil that has been roughly leveled in advance by a soil piling body. [Background technology]

[0002] Patent Document 1 describes an example of a work machine that uses tilling tines attached to a traveling machine body that rotates to cultivate and level a field. This machine is equipped with a soil piling plate that pushes soil into grooves formed on the field surface by tires or the like as the traveling machine body passes over. The soil piling plate pushes soil into the grooves, improving the leveling performance. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-208869 A Summary of the Invention [Problem to be solved by the invention]

[0004] In order to perform the tilling work quickly in a short time, it is necessary to increase the traveling speed of the traveling machine, i.e., the working speed. On the other hand, there are cases where the working speed cannot be increased depending on the soil quality, the moisture content of the soil, and the area of ​​the work field. The soil piling plate of the working machine described in Patent Document 1 does not have a structure that can respond to changes in the working speed, and there is a problem that when the working speed changes, the soil piling effect, i.e., the effect of erasing the traveling traces, cannot be fully exerted.

[0005] Therefore, the present invention has been made in consideration of the above-mentioned problems, and has an object to provide a tilling machine that can exert a soil-piling effect even when the speed conditions change. [Means for solving the problem]

[0006] The present invention relates to A soil crushing unit located behind the traveling body and crushing the soil by rotating the tilling claws as the traveling body advances; A soil-collecting body is arranged behind the traveling body in the traveling direction and forward of the soil crushing section in the traveling direction, and is capable of moving soil to the traveling trace formed by the traveling body to erase the traveling trace; The soil-relieving body Due to collisions with soil as it advances Horizontally Clockwise and counterclockwise A rotatable pivot shaft, The soil-pile body has a first soil-pile body and a second soil-pile body of the same structure that are installed opposite each other across the width of a rut formed in a field by the plowing machine 1, which is a traveling machine body, and is biased in one turning direction by an elastic member. To the earth-mover of the pivot shaft Take The mounting position is set at a position shifted laterally from the center of the left and right width of the soil-collecting body, and the area of ​​each surface in contact with the soil on both sides of the soil-collecting body sandwiching the pivot shaft is changed. A tilling machine characterized by the above features, relates to.

[0008] The present invention relates to A soil crushing unit located behind the traveling body and crushing the soil by rotating the tilling claws as the traveling body advances; The apparatus is arranged behind the traveling body in the traveling direction and ahead of the soil crushing unit in the traveling direction, and can move soil to the traveling traces formed by the traveling body to erase the traveling traces. and has a surface that is inclined rearward toward the travel path in a plan view. With the pile of soil, The soil-relieving body Due to collisions with soil as it advances A rotating shaft capable of rotating in a horizontal direction, To the earth-mover of the pivot shaft Take The installation position is The pivot shaft The area of ​​the side farther from the travel trace is larger than the area of ​​the side closer to the travel trace. A tilling machine characterized by the above features, relates to.

[0009] The present invention further comprises: A tilling machine characterized in that the pressing force from the soil received by each surface of the soil mound on both sides of the mounting position of the rotating shaft to the soil mound is changed. relates to.

[0010] The present invention further comprises: The soil-collecting body is configured to be movable in the vertical direction by the rotating shaft, and the soil-collecting body can be fixed at any position in the vertical direction, and is detachable. A tilling machine characterized by the above features, relates to.

[0012] The present invention further comprises: The tilling machine includes a central work body and a side work body which is an extension of the central work body, The soil collector is provided on the central working body. A tilling machine characterized by the above features, relates to.

[0013] The present invention further comprises: The tilling machine includes a central work body and a side work body which is an extension of the central work body, The soil collector is provided on the side working body. A tilling machine characterized by the above features, relates to. Effect of the Invention

[0014] This invention provides a tilling machine that produces a good finished result from tilling work because the soil that has been roughly leveled in advance by the soil-collecting body is then leveled by the soil-crushing section. [Brief description of the drawings]

[0015] [Figure 1] 1 is a front view of a tilling machine according to a first to fourth embodiments of the present invention, showing the entirety of the tilling machine as seen from the front in the traveling direction. [Diagram 2] 1 is a plan view of a tilling machine according to a first to fourth embodiments of the present invention. [Diagram 3] FIG. 1 is a side view of a tilling machine according to a first embodiment of the present invention, viewed from the left in the direction of travel. [Figure 4] 1 is a bottom view of the tillage implement according to the first embodiment of the present invention, showing a part of the first to third mounding bodies on the left side in the direction of travel. The upper part of the drawing shows the front part of the tillage implement. [Diagram 5] FIG. 2 is a side view of the working surface of the first mounding body on the left side of the tilling machine according to the first embodiment of the present invention, as viewed from the front. [Figure 6] FIG. 2 is a front view of the tilling machine according to the first embodiment of the present invention, viewed from a direction perpendicular to the working surface of the first mounding body on the left side. [Figure 7] FIG. 2 is a front view of the tilling machine according to the first embodiment of the present invention, viewed from a direction perpendicular to the working surface of the second mounding body on the left side. [Figure 8] FIG. 2 is a side view of the working surface of the second mounding body on the left side of the tilling machine according to the first embodiment of the present invention, as viewed from the front. [Figure 9] FIG. 2 is a front view of the tilling machine according to the first embodiment of the present invention, viewed from a direction perpendicular to the working surface of the third mounding body on the left side. [Figure 10] FIG. 2 is a side view of the working surface of the third soil-pile body on the left side of the tilling machine according to the first embodiment of the present invention, as viewed from the front. [Figure 11] 1 is a side view of a tilling machine according to a second embodiment of the present invention, showing the whole of the tilling machine as seen from the left side in the traveling direction. [Figure 12] FIG. 11 is an enlarged perspective view of a mounding body of a tilling machine according to a second embodiment of the present invention. [Figure 13] 11 is a cross-sectional view of a piler of a tillage machine according to a second embodiment of the present invention, taken at the fulcrum boss, with the piler (fulcrum pipe) moved upward. FIG. [Figure 14] 11 is a cross-sectional view of a piler of a tillage machine according to a second embodiment of the present invention, taken at the fulcrum boss, with the piler (fulcrum pipe) moved downward. FIG. [Figure 15] FIG. 11 is an enlarged front view of a mounding body of a tillage implement according to a second embodiment of the present invention, showing the tillage implement at a low speed. [Figure 16]FIG. 11 is an enlarged plan view of a mounding body of a tillage implement according to a second embodiment of the present invention, viewed from the fulcrum axis direction, at low speed. [Figure 17] FIG. 11 is an enlarged front view of a mounding body of a tilling machine according to a second embodiment of the present invention, showing the tilling machine at high speed. [Figure 18] This is an enlarged plan view of the mounding body of a tillage machine according to a second embodiment of the present invention, in which the solid line parts of the mounding body and regulating part indicate high speed (after rotation), and the dashed double-dashed line parts indicate low speed (before rotation). [Figure 19] FIG. 11 is an enlarged plan view of a mound of a tillage machine according to a third embodiment of the present invention, in which the mound is shown by solid lines at a low speed and the mound is shown by two-dot chain lines at a high speed. [Figure 20] FIG. 13 is an enlarged plan view of a mounding body of a tilling machine according to a fourth embodiment of the present invention, in which the mounding body shown in solid lines represents the mounding body at low speed, and the mounding body shown in two-dot chain lines represents the mounding body at high speed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] A tilling machine according to a first embodiment of the present invention will be described with reference to the drawings. Number 1 is a tilling machine. A central working body 11 is located at the center of the tilling machine 1 and performs tilling work. The left extended working body 11L is located on the left side of the central working body 11 in the direction of travel, and is foldably attached to the central working body 11 to perform tilling work. 11R is the right extended working body. The right extended working body 11R is located on the right side of the central working body 11 in the traveling direction, can be folded up with the central working body 11, and performs plowing work.

[0017] Reference numeral 2 denotes a frame. The frame 2 has a pipe frame 22. The pipe frame 22 is a frame that forms the skeleton of the tilling machine 1. Reference numeral 20 denotes a mounting portion. Reference numeral 201 denotes a top link pin. Reference numeral 202 denotes a lower link pin. The mounting portion 20 has the top link pin 201 and the lower link pin 202. The mounting part 20 is used to attach the tillage implement 1 to a tractor that tows the tillage implement 1.

[0018] Reference numeral 21 denotes an input case, and 211 denotes an input shaft. The input shaft 211 is attached inside the input case 21 and connected to a PTO shaft of a tractor to take out the driving force of the tractor. A top mast 212 is provided on the pipe frame 22. The top mast 212 has a top link pin 201 at its tip. Reference numeral 213 denotes 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. A transmission case 23 is provided on the pipe frame 22 and outputs the driving force from the input shaft 211 provided on the input case 21.

[0019] A support frame 24 is provided at a position symmetrical to the transmission case 23 with respect to the input case 21, and holds a rotor shaft 31 (described later) below the pipe frame 22. Numeral 25 denotes a fulcrum. The fulcrum 25 is provided at both ends of the pipe frame 22, and serves as a folding and rotating fulcrum for the left extended working body 11L and the right extended working body 11R. A fulcrum frame 41L protruding upward from the left cover body 4L provided on the left extended working body 11L is rotatably connected to one of the fulcrum parts 25, and a fulcrum frame 41R protruding upward from the right cover body 4R provided on the right extended working body 11R is rotatably connected to the other fulcrum part 25.

[0020] Reference numeral 3 denotes a soil crushing unit. The soil crushing unit 3 is provided below the frame 2 and can be rotated to crush soil in a farm field. The soil crushing unit 3 is provided on the tilling machine 1 attached to the rear of a traveling machine body such as a tractor, and is located at the rear of the traveling machine body. As the traveling machine body such as a tractor advances, the tilling tines 32 provided on the soil crushing unit 3 are rotated to crush the soil. 3L is the left extended soil crushing section. The left extended soil crushing section 3L is rotatably attached to the left extended working body 11L on the left side of the soil crushing section 3 in the traveling direction, and can be folded together with the left extended working body 11L. 3R is the right extended soil crushing section. The right extended soil crushing section 3R is rotatably attached to the right extended working body 11R on the right side of the soil crushing section 3 in the traveling direction, and can be folded together with the right extended working body 11R. A rotor shaft 31 is a rotating shaft that is hung between the lower parts of the transmission case 23 and the support frame 24, and is rotated by the driving force from the transmission case 23. 31L is the left extension-side rotor shaft. The left extension-side rotor shaft 31L is provided on the left side in the traveling direction of the rotor shaft 31. 31R is the right extension-side rotor shaft. The right extension-side rotor shaft 31R is provided on the right side in the traveling direction of the rotor shaft 31. The left extension-side rotor shaft 31L and the right extension-side rotor shaft 31R rotate by the driving force from the transmission case 23.

[0021] A plurality of tillage tines 32 are attached around the rotor shaft 31 and the left extension-side rotor shaft 31L and the right extension-side rotor shaft 31R, and are driven by the rotation of the rotor shaft 31 and the left extension-side rotor shaft 31L and the right extension-side rotor shaft 31R to till the field. The central dog clutch 33 is provided near the transmission case 23 and the support frame 24 at both ends of the soil crushing unit 3. The left extension side of the extension side dog clutch 33L is provided on the right side of the left extension soil crushing section 3L in the traveling direction and meshes with the center side of the dog clutch 33 to form a dog clutch on the left side in the traveling direction. 33R is the right extension of the extension side dog clutch. The right extension side of the extension side dog clutch 33R is provided on the left side of the left extension soil crushing section 3R in the direction of travel, and meshes with the center side of the dog clutch 33 to form a dog clutch on the right side in the direction of travel. The dog clutch turns on and off the rotational drive of the rotor shaft 31 and the left extension side rotor shaft 31L and right extension side rotor shaft 31R.

[0022] The retaining portion 34 is a bearing portion for the rotor shaft 31, and is provided on the lower portion of the transmission case 23 and the support frame 24. The left extension side holding portion 34L is a bearing portion for the rotor shaft 31L, and is provided in the vicinity of the left extension side dog clutch 33L at the bottom of the left cover body 4L described later. The right extension side holding portion 34R is a bearing portion for the rotor shaft 31R, and is provided in the vicinity of the right extension side 33R of the extension side dog clutch at the lower portion of the right cover body 4R described later. The retaining portion 34, the left extension side retaining portion 34L, and the right extension side retaining portion 34R each have a bearing and an oil seal therein.

[0023] Reference numeral 4 denotes a cover body. Cover body 4 covers the upper part of soil crushing section 3. 4L denotes a left cover body. 4R denotes a right cover body. The left cover body 4L covers the upper part of the left extended soil crushing section 3L. The right cover 4R covers the upper part of the right extended soil crushing section 3L. The cover 4, the left cover 4L and the right cover 4R prevent the soil crushed or tilled by the soil crushing section 3, the left extended soil crushing section 3L and the right extended soil crushing section 3R from scattering to the surrounding area. The left fulcrum frame 41L is a member protruding upward for mounting the left extended working body 11L of the tilling implement 1 so as to be rotatable relative to the fulcrum portion 25, and is an arm integrated with the left cover body 4L. The right fulcrum frame 41R is a member protruding upward for mounting the right extended working body 11R of the tilling implement 1 so as to be rotatable relative to the fulcrum portion 25, and is an arm integrated with the right cover body 4R.

[0024] Reference numeral 42b denotes a support member that supports the first mounding body 42, which will be described later. The support member 42b of the first mounding body 42 is a member for attaching the first mounding body 42 to the tillage implement 1, and is a plate-like member that is arranged and fixed while curving 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 mounding body 42 is attached to the lower part of this support member 42b. Reference numeral 43b denotes a support member that supports the second mounding body 43, which will be described later. The support member 43b of the second mounding body 43 is a member for attaching the first mounding body 42 to the tillage implement 1, and is a plate-like member that is arranged and fixed so as to hang downward from each of both ends of the front part of the cover body 4. The lower part of the support member 43b is located below the lower end part of the cover body 4, and the second mounding body 43 is attached to the lower part of this support member 43b.

[0025] Reference numeral 45 denotes a front cover. The front cover 45 is positioned forward of the front ends of the cover body 4 and the left cover body 4L and the right cover body 4R. Furthermore, the lower end of the front cover 45 is positioned lower than the front ends of the cover body 4 and the left cover body 4L and the right cover body 4R. In the first embodiment, the front cover 45 is disposed in front of the cover body 4. The front cover 45 prevents mud and the like from scattering forward from between the cover body 4 and the field surface. Reference numeral 46 denotes a stand bracket. The stand bracket 46 is a bracket for mounting the tilling implement 1 on a stand (not shown). The stand brackets 46 are disposed on both ends of the front part of the cover body 4, and can ensure the stability of the implement when it is stored or moved using a stand (not shown). Numeral 47 denotes a rear soil-pile body. The rear soil-pile body 47 is a plate-shaped member, and is located rearward of the rotor shaft 31 and the left and right extension rotor shafts 31L and 31R in the direction of travel, and is attached to the left cover body 4L or the cover body 4R. The lower end of the rear soil-pile body 47 inclines toward the dog clutch center side 33 as it moves downward, and is located below the dog clutch center side 33 in a front view. The rear soil-pile body 47 is located at the rear of the direction of travel of the tilling implement 1, and performs soil-pile work to move soil that has passed near the left extension side retaining portion 34L and the right extension side retaining portion 34R toward the dog clutch center side 33 as the tilling implement 1 travels.

[0026] The first soil-pile body 42 is located in front of the soil-crushing section 3 and below the cover body 4, and the surface of the first soil-pile body 42, which is located on one side of the width of a rut formed in the field by the tilling implement 1, which is the traveling machine body, is inclined rearward as it approaches the outside of the machine body width. The first soil-pile carrying body 42 is installed at the center of the tillage implement 1. 42a is the first working surface. The first working surface 42a is provided on the surface of the first soil piling body 42, and as the tillage implement 1 moves, the soil that comes into contact with it is sent sequentially along the first working surface 42a toward the rear and the tread groove side, performing soil piling work. The upper and lower ends of the first working surface 42a are curved toward the front, and the soil pushed out is prevented from climbing over this curved portion and is efficiently sent to the tread groove side.

[0027] The second soil-pile body 43 is located in front of the soil-crushing section 3 and below the cover body 4, and the surface located on the other side of the wheel track is inclined backward as it approaches the inside relative to the width of the tilling implement 1, which is the width of the machine body. The second mounding body 43 is installed on the end side of the cover body 4, which is on the outer side of the width of the tillage implement 1 than the first mounding body 42. The first mounding body 42 and the second mounding body 43 are installed facing each other across the width of a rut formed in the field by the tilling implement 1, which is a traveling machine body. 43a is the second working surface. The second working surface 43a is provided on the surface of the second soil-pile body 43, and as the tillage implement 1 moves, the soil that comes into contact with it is sent sequentially backward and toward the wheel groove side along the second working surface 43a to perform soil-pile work. The upper and lower ends of the second working surface 43a are curved toward the front, and the soil pushed out is prevented from climbing over this curved portion and is efficiently sent to the wheel groove side.

[0028] The third soil-pile body 44 is located in front of the soil-crushing section 3 and below the cover body 4, and is disposed on the other side of the wheel rut. The surface located on the outer side of the second soil-pile body 43 on the left and right sides in the traveling direction is inclined backward as it approaches the inside with respect to the width of the tilling implement 1, which is the width of the machine body. The third mounding body 44 is installed on the end side of the cover body 4 of the tillage implement 1, and is located further outward in the direction of travel than the second mounding body 43. The third mounding body 44 is attached to a stand bracket 46, with one end of the stand bracket 46 extending downward as a support member. The first mounding body 42, the second mounding body 43 and the third mounding body 44 are installed facing each other across the width of a rut formed in the field by the tillage implement 1, which is a traveling machine body.

[0029] 44a is the third working surface. The third working surface 44a is provided on the surface of the third soil-pile body 44, and as the tillage implement 1 moves, the soil that comes into contact with the third working surface 44a is sequentially sent backward and toward the wheel groove side to perform soil-pile work. The third working surface 44a is oriented slightly downward compared to the first working surface 42a and the second working surface. That is, from Fig. 4, the first action surface 42a and the second action surface 43a face diagonally forward from each other, and are not inclined in the vertical direction of the aircraft, which is the depth direction in the drawing. They are parallel to each other only in the vertical inclination component. As can be seen from Fig. 8, the third action surface 44a is inclined downward with respect to the second action surface 43a. The line segment at the center of the second action surface 43a and the line segment of the third action surface 44a (not shown; equivalent to the contour line drawn immediately to the left of the starting point on the right side of the lead line of 44) are not parallel. Therefore, when the soil moves along the surface toward the wheel tracks, the soil can be sent below the field surface as it moves backward and toward the wheel tracks. Therefore, the soil that has moved along the third working surface 44a is prevented from floating up to the field surface, so the wheel tracks can be filled in while flattening the field surface without disturbing it.

[0030] The area of ​​the second action surface 43a of the second soil-pile 43 is smaller than the area of ​​the first action surface 42a of the first soil-pile 42, and the area of ​​the third action surface 44a of the third soil-pile 44 is smaller than the area of ​​the second action surface 43a. The area of ​​the second working surface 43a of the second soil-pile body 43 is smaller than the area of ​​the first working surface 42a of the first soil-pile body 42, and the area of ​​the third working surface 44a of the third soil-pile body 44 is smaller than the area of ​​the second working surface 43a. In other words, the working areas of the first working surface 42a, the second working surface 43a, and the third working surface 44a are set to be different from each other.

[0031] As shown in FIG. 4, which shows a bottom view, α is the first angle of the first mound 42. The first angle α is an angle with respect to the traveling direction of the first mounding body 42. Similarly, β is a second angle of the second mounding body 43. The second angle β is an angle of the second mounding body 43 with respect to the traveling direction. Similarly, γ is a third angle of the third mounding body 44. The third angle γ is an angle of the third mounding body 43 with respect to the traveling direction.

[0032] In a plan view or a bottom view, the third angle γ, which is the angle between the traveling direction and the third action surface 44a, is larger than the second angle β, which is the angle between the traveling direction and the second action surface 43a, and the first angle α, which is the angle between the traveling direction and the first action surface, is larger than the angle between the traveling direction and the third action surface 44a. That is, the first angle α, the second angle β, and the third angle γ are set to angles different from each other.

[0033] As shown in Fig. 2, which is a plan view, and Fig. 3, which is a side view seen from the left side in the direction of travel, the front end of the first mounding body 42 is located rearward of the front end of the second mounding body 43. The second mounding body 43 protrudes in the direction of travel from the first mounding body 42. In reality, the backfilling effect is better if the first mounding body 42 protrudes in the direction of travel, but the first mounding body 42 cannot protrude in the direction of travel to avoid contact with the tires and crawlers of the tractor when the three-point link moves up and down.

[0034] The front end of the third mounding body 44 is located rearward of the front end of the first mounding body 42. In order to supplement the flow of soil overflowing from the second mounding body 43, the third mounding body 44 is provided some distance rearward of the second mounding body 43. If the third mounding body 44 is provided too far forward of the second mounding body 43, the gap between the second mounding body 43 and the third mounding body 44 will become narrow, and the flow of soil passing between them will become poor. The front ends of the first, second and third mounding bodies 42, 43 and 44 protrude forward from the front end of the cover body 4. The first mounding body 42 is disposed near the center of the cover body 4 in the width direction of the body, and the second and third mounding bodies 43, 44 are disposed at the ends of the cover body 4 in the width direction of the body. Before the soil reaches the soil crushing 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 to the wheel groove in advance.

[0035] The first soil-collecting body 42 is attached to a support member 42b arranged facing downward from the mounting part 20 for mounting to the tillage implement 1, which is the traveling machine body. Reference numeral 46 denotes a stand bracket. The stand bracket 46 is disposed between the second soil-piling body 43 and the third soil-piling body 44 in a plan view, and a stand (not shown) can be attached to the stand bracket 46. Reference numeral 34 denotes a holding portion. The holding portion 34 is located behind the third soil-collecting body 44 and holds the rotation shaft of the soil crushing portion 3. The holding portion 34 is attached to the lower portions of the transmission case 23 and the support frame 24, respectively.

[0036] A ground leveling body 5 is attached to the rear of the cover body 4 at the rear of the tillage implement 1 in the direction of travel during operation. The ground leveling body 5 levels the field as the tillage implement 1 travels. The left ground leveling body 5L is attached to the rear of the left cover body 4L and constitutes the left end of the ground leveling body 5 in the traveling direction during work. The right ground leveling body 5R is attached to the rear of the right cover body 4R and constitutes the right end of the ground leveling body 5 in the direction of travel during work.

[0037] Reference numeral 51 denotes a first ground leveling body. As shown in Fig. 2, which is a plan view of the tilling machine 1 according to the first embodiment of the present invention, the first ground leveling body 51 levels the ground forward of the rear end of the tilling machine 1. A first ground leveling body left 51L is located at the left end of the first ground leveling body 51 in the traveling direction, and a first ground leveling body left 51R is located at the right end in the row direction. 512 is a fulcrum axis. Reference numeral 52 denotes a hinge. The hinge 52 is attached via a fulcrum shaft 512 to the first leveling body 51, the first leveling body left 51L, and the first leveling body left 51R of the leveling body 5 as a pivot point for vertical rotation relative to the cover body 4, the cover body left 4L, and the cover body right 4R.

[0038] A second soil leveling body 56 is disposed on the rear end side of the first soil leveling body 51 attached to the tillage implement 1, as shown in FIG. The left second ground leveling body 56L levels the rear of the left cover body 4L located on the left side in the traveling direction. The right second ground leveling body 56R levels the rear of the right cover body 4R located on the right side in the traveling direction. The reference numeral 562 denotes a pivot point. The pivot point 562 is provided at the rear end of the first ground leveling body 51, the left first ground leveling body 51L, and the left first ground leveling body 51R, and allows the second ground leveling body 56, the left second ground leveling body 56L, and the right second ground leveling body 56R to be pivotable up and down relative to the first ground leveling body 51, the left first ground leveling body 51L, and the left first ground leveling body 51R.

[0039] As shown in Table 1, the sizes of the areas of the working surfaces of the first, second and third pilers 42, 43 and 44 are in the order of first piler 42 > second piler 43 > third piler 44 in both forward projected area and actual area. The first piler 42 has the largest forward projected area and actual area, so it can capture a large amount of soil and has a large soil-pile effect in the low-speed range. The second piler 43 has a smaller forward projected area and actual area than the first piler 42, but it is less likely to resist the soil pushing in from the direction of travel and can move efficiently along the second working surface 43a, so it has a large soil-pile effect in the high-speed range. The third piler 44 assists the second piler 43 in piling up soil in the high-speed range, and can capture soil and mud that has overflowed from the front of the second piler 43 to the side of the third piler 44 and move it to the center of the working width. The first mounding body 42, the second mounding body 43 and the third mounding body 44 each have different characteristics and roles in different speed ranges.

[0040] The reason why the active area of ​​the second mounding body 43 is smaller than that of the first mounding body 42 in both forward projection area and actual area will be explained. Simply put, if the second mounding body 43 is placed symmetrically with the first mounding body 42 and the rut across the width of the rut, the amount of soil movement increases, and the backfilled ruts may end up with more soil. To prevent this, the working area of ​​the second mounding body 43, which is placed symmetrically with the first mounding body 42 and the rut across the width of the rut, is made smaller in both forward projection area and actual area to adjust the amount of soil to be backfilled in the rut.

[0041] The reason why the active area of ​​the third mounding body 44 is smaller than that of the second mounding body 43 in both forward projection area and actual area as shown in Table 1 will be explained below. When the working speed of the tilling implement 1 is increased, soil may spill outward from the front end of the second mounding body 43. The third mounding body 44 captures this spilled soil and moves it toward the rut via the rear of the second mounding body 43. Since the third mounding body 44 serves as an auxiliary for the second mounding body 43, the area of ​​the third working surface 44a of the third mounding body 44 is smaller than the area of ​​the second working surface 43a of the second mounding body 43 in both forward projection area and actual area. Conversely, if it is made larger, the amount of soil to be filled back into the rut increases, which causes the inconvenience of forming ruts.

[0042] The area of ​​the active surface of the first mounding body 42 and the total area of ​​the active surfaces of the second mounding body 43 and the third mounding body 44 are approximately equal in terms of forward projection area. In terms of actual area, the sum of the second and third pilers 43 and 44 exceeds that of the first piler 42, but by combining the difference in the forward projection area of ​​each piler formed by the action angle of each piler, as described below, and the arrangement of each piler, it is possible to achieve an optimal pile-up effect even at different speed ranges.

[0043] The size of the first soil pile 42 will be described. Although the first mounding body 42 can move a large amount of soil, due to the large first angle α described below, the soil may move inefficiently toward the rut side, i.e., in the width direction, as it moves forward, depending on the soil quality. Specifically, there is a phenomenon in which part of the soil that collides with the first working surface 42a of the first mounding body 42 from the front in the direction of travel tends to escape upward. In order to receive this escaping soil, the area of ​​the first working surface 42a of the first mounding body 42 is made large. The area is particularly enlarged toward the top.

[0044] The shape of the first soil pile 42 will be described. The upper end of the first working surface 42a of the first mounding body 42 provided on the first mounding body 42 is curved forward. This curvature prevents the soil from moving over the top of the first mounding body, and causes the soil to move forward of the first working surface 42a of the first mounding body 42 and toward the wheel track. Also, the upper end of the first working surface 42a is inclined downwards as it approaches the rut side. The front side of the first working surface 42a of the first mounding body 42, i.e., the side located farther from the rut, has a long distance to move sideways. This causes the soil to rise up as described above. On the other hand, the rear side of the first working surface 42a of the first mounding body 42, i.e., the side closer to the rut, has a short distance to move sideways, so the soil moves to the rut side before moving upwards. For this reason, even if the rut side, i.e., the upper end on the inside, is inclined downwards, problems with soil movement are unlikely to occur.

[0045] The angles of the respective action surfaces will now be described. As described above, the first and second mounders 42 and 43 have different preferred working speeds, and the angles are set based on this. By making a large angle with the traveling direction, the first mounding body 42 has a large projected area as seen from the front in the traveling direction, so that more soil can be piled up. In the first embodiment, the most suitable angle for the first mounding body 42 is 65 degrees, and the suitable angle range is 60 to 70 degrees. If it is more than 70 degrees, the soil flow will be poor and the traction resistance of the tillage implement 1 will be large. If the angle is less than 60 degrees, the soil movement efficiency at low speeds will decrease.

[0046] The angle of the second mounding body 43 with respect to the traveling direction is set smaller than that of the first mounding body 42. In the first embodiment, the most preferable angle of the second mounding body 43 is 45 degrees, and the preferable angle range is 40 to 50 degrees. This is to improve the soil flow even when the traveling speed increases. When the traveling speed of the tilling implement 1 increases, the flow of soil that collides with the first mounding body 42, which has a large angle with respect to the traveling direction, becomes poor, whereas the second mounding body 43, which has a smaller angle with respect to the traveling direction than the first mounding body 42, can improve the soil flow compared to the first mounding body 42. In other words, when the speed range is high, the second mounding body 43 can move a larger amount of soil than the first mounding body 42. As a result, the first mounding body 42 and the second mounding body 43 can ensure the amount of soil to fill the ruts over a wide range of working speeds. Incidentally, the customary speed during plowing work is about 1 to 3 km / h. The working speed in this embodiment is 1 to 5.5 km / h.

[0047] As shown in Table 1, the third soil piler 44 has a small area both in the frontal projection area and the actual area, and therefore has a slightly larger angle compared to the second soil piler 43 in order to secure the frontal projection area. In the first embodiment, the most preferable angle is 50 degrees, and the preferable angle range is 45 to 55 degrees. The third soil piler 44 allows the soil and soil clods to be sent to the soil crushing section 3 without passing through the transmission case 23 and the support frame 24, which are parts where the tilling tines do not rotate, and the vicinity of the holding section 34 that holds the soil crushing section 3 attached to them. This makes it possible to prevent a decrease in the tilling performance due to poor soil crushing of the soil and soil clods.

[0048] To avoid interference with the traveling body located in front, the tips of the first mounding body 42, the second mounding body 43 and the third mounding body 44 are set so as not to protrude forward from the tip of the mounting part 20. Also, because the tips of the first mounding body 42, the second mounding body 43 and the third mounding body 44 protrude forward from the front end of the cover body 4, it is possible to stop the movement of the soil before it reaches the rotation area of ​​the tilling tines 32, improving soil crushing performance.

[0049] The stand bracket 46 will now be described. The stand bracket 46 is a holding member for attaching a stand (not shown) for grounding the tiller alone during storage. In particular, when the extension working unit is stored in a folded state, the center of gravity becomes high, so in order to ensure stability when grounded, it is best to provide the stand in a position as wide as possible on the width of the machine. In the case of the first embodiment, stability is ensured by providing the stand at the end of the cover body 4 in the front part of the transmission case 23 and the support frame 24. [Table 1]

[0050] A second embodiment of the present invention will be described mainly with reference to Figures 11 to 18. In the second embodiment, a second mounding body 43 having the following structure is provided to the first embodiment. The first mounding body 42 and the third mounding body 44 may also have the same structure.

[0051] The first, second and third pilers 42, 43 and 44, including the second piler 43, are arranged behind the tractor, which is the traveling machine body, in the direction of travel and in front of the soil crushing unit 3 in the direction of travel, so that it is possible to move soil to the tracks formed by the tractor and erase the tracks. The second piler 43 in the second embodiment is provided at both the left and right ends of the cover body 4. In the explanation of the second embodiment, the second piler 43 provided at the left end of the cover body 4 is used for explanation, and the second piler 43 provided at the right end has a symmetrical shape to the second piler 43 provided at the left end, so the explanation is omitted to avoid repetition. In addition, the second piler 43 at the left end of the cover body 4 is described as having a rut located at the center side in the direction of travel of the tilling machine 1. In addition, the first and third pilers 42 and 44 may have the same structure. The second soil-pile body 43 is positioned at the edge of the wheel tracks, and moves soil into the wheel tracks to erase the tracks and level the surface. The upper part of the second soil-pile body 43 is bent slightly forward to prevent soil moving along the front of the second soil-pile body 43 from riding up onto the second soil-pile body 43 and moving backward.

[0052] Reference numeral 46 denotes a cover body side protruding piece. The cover body side protruding piece 46 is provided on the cover body 4. The cover body side protruding piece 46 protrudes from the cover body 4 forward in the traveling direction of the tilling implement 1. A mounting base 47 is attached to the front surface of the cover body 4 in the traveling direction. Reference numeral 471 denotes a left / right position adjustment hole of the mounting base 47. The mounting base 47 is provided with a plurality of left / right position adjustment holes 471, so that the mounting base 47 can be mounted at a selected left / right position relative to the left / right direction of travel. A contact piece 472 is provided facing forward in the direction of travel of the mounting base 47, and can be brought into contact with a restricting piece 64, which will be described later.

[0053] A is a pivot shaft. 62 is a fulcrum boss. 61 is a fulcrum pipe. The pivot shaft A is made up of a fulcrum pipe 61 and a fulcrum boss 62. The fulcrum boss 62 is a cylindrical member with an axial direction facing up and down, and is fixed to the front end of the contact piece 472. The fulcrum boss 62 may be directly provided on the mounting base 47. The fulcrum pipe 61 is provided on the cylindrical inner diameter of the fulcrum boss 62, and can move up and down in the axial direction and rotate around the axis. The pivot shaft A allows the mounding body (second mounding body 43) provided integrally on the front side of the fulcrum pipe 61 to rotate in an approximately horizontal direction. The front projection area of ​​the second mounding body 43 when viewed from the front of the traveling direction can be changed by rotating the mounding body (second mounding body 43). By selecting the mounting position of the second soil-pile body 43 in the left-right direction of the traveling direction of the pivot axis A, the area of ​​both the left and right sides of the soil-pile body 43 on either side of the pivot axis A in the left-right width in the traveling direction, on one side from the pivot axis A in the left-right width in the traveling direction, and on the other side from the pivot axis A in the left-right width in the traveling direction. The pivot axis A allows the second mounding body 43, which is a soil-pile body, to move in the vertical direction by the fulcrum boss 62, and can fix the second mounding body 43 at any position in the vertical direction. The pivot axis A and the fulcrum boss 62 can be moved in the left-right width direction relative to the soil crushing section 3 by the mounting base 47, so that the position of the second mounding body 43, which is a soil-pile body, can be changed in the left-right width direction.

[0054] An elastic member 71 biases the second mounding body 43, which is rotatable about the rotation axis A, in one rotation direction. In the second embodiment, the elastic member 71 acts as a tension spring that pulls the end portion of the second mounding body 43 on the left and right central side of the cover body 4L toward the rear, that is, the cover body 4. Reference numeral 64 denotes a regulating body (regulating piece). Reference numeral 472 denotes a contact piece. The contact piece 472 is a plate-like member having a base portion attached to the mounting base 47, and has a tip portion facing forward that contacts the regulating body 64. The regulating body 64 is a bifurcated member attached to the supporting pipe 61. The regulating body 64 rotates integrally with the second mounding body 43, which is a soil-pile body, and restricts the range in which the second mounding body 43 can rotate by contacting the contact piece 472. In other words, the second mounding body 43 can rotate only up to the point where the contact piece 472 comes into contact with the space between the bifurcated regulating body 64.

[0055] Reference numeral 65 denotes a vertical position adjustment hole, 66 an upper collar, and 67 a lower collar. The vertical position adjustment holes 65 are through holes provided in the axial direction of the fulcrum pipe 61. The upper collar 66 and the lower collar 67 are provided on the fulcrum pipe 61 so as to sandwich the fulcrum boss 62 from above and below, and regulate the vertical movement of the fulcrum pipe 61 relative to the fulcrum boss 62. In the second embodiment, the upper collar 66 is provided integrally with the regulating body 64. The vertical position adjustment holes 65 adjust the vertical position of the fulcrum pipe 61 by selecting the upper and lower attachment positions of the fulcrum pipe 61 and the upper collar 66 and lower collar 67. Reference numeral 431 denotes holes for adjusting the relative position to the left and right in the traveling direction with respect to the fulcrum pipes 61 provided in plurality on the second mounding body 43. The relative position adjustment holes 431 are attachment positions of the fulcrum pipes 61 and the second mounding body 43. The second mounding body 43 adjusts its left and right position with respect to the pivot axis A by selecting one of the relative position adjustment holes 431 which is the attachment position of the fulcrum pipes 61 and the second mounding body 43. The hole 431 for adjusting the relative position with the fulcrum pipe 61, which is the attachment position of the second mounding body 43 and the pivot axis A, avoids the center in the width direction of the surface of the second mounding body 43. In other words, it is offset from the center in the width direction of the second mounding body 43. In the case of the second embodiment, the center of the four holes 431 for adjusting the relative position with the fulcrum pipe is approximately the center in the width direction of the surface of the second mounding body 43.

[0056] 681(68), 682(68) are fixing members. The fixing members 681(68), 682(68) are made of bolts, and are fixed to the fulcrum pipe 61 by passing the upper collar 66 and the lower collar 67 through the vertical position adjustment holes 65. The upper collar 66 and the lower collar 67 to which the fixing members 681(68), 682(68) are attached enable the fulcrum pipe 61 to be attached to the fulcrum boss 62 so as not to move in the vertical direction. The second mounding body 43, which is a mounding body, is fixed in front of the fulcrum pipe 61, and the fulcrum pipe 61 essentially serves as the rotation axis A of the second mounding body 43. The fulcrum pipe 61 can slide up and down and rotate around its axis relative to the fulcrum boss 62. The second mounding body 43 can be attached and detached by pulling the fulcrum pipe 61 out of the fulcrum boss 62. The fulcrum pipe 61 is provided with a plurality of holes 65 for adjusting the vertical position, and an upper collar 66 and a lower collar 67 are used to select and fix the vertical position, and to regulate the vertical movement of the fulcrum pipe 61. Therefore, the vertical position of the mounding body (second mounding body 43) can be adjusted.

[0057] The restricting body 64 provided on the upper collar 66 is bifurcated. A contact piece 472 protruding forward from the mounting base 47 is positioned between the bifurcated parts of the restricting body 64. The restricting body 64 comes into contact with the contact piece 472, thereby restricting the rotation of the fulcrum pipe 61. In the second embodiment, the elastic member 71 is bridged between the pivot shaft side protruding piece 63 provided upward from the top of the upper collar 66 and the pivot shaft side protruding piece 63 provided on the mounting base 47 or the cover body 4. A force is applied to the mounding body (second mounding body 43) so as to rotate it to one side via the upper collar 66 and the fulcrum pipe 61. In the embodiment, a tension spring is shown, but the elastic member 71 may also be a compression spring, a coil spring, or a fluid pressure-using spring arranged to rotate it to one side.

[0058] In the second embodiment, the second soil-retaining body 43 can change its projected area when viewed from the front side in the direction of travel by rotating approximately horizontally around the rotation axis A depending on the moving speed. The soil, which has been roughly leveled in advance by the soil-collecting body (second soil-collecting body 43), is then leveled in the soil-crushing section 3 and the soil-leveling section, so that the finished state of the plowing work is excellent. By changing the frontal projection area of ​​the second soil piler 43, the amount and force of the soil pushed aside and moved can be adjusted according to the moving speed, so that the soil can be leveled even more flatly.

[0059] In the second embodiment, the rotation of the mounding body (second mounding body 43) which changes the forward projection area is achieved by the force of the soil colliding with the mounding body (second mounding body 43) as the tillage implement 1 moves forward. The change ratio of the front projection area of ​​the mounding body (second mounding body 43) is preferably 1.2 to 1.5 times from the small area to the large area, and in this embodiment, 1.35 times is adopted. In the second embodiment (shown in the figure), when the working speed changes from a low speed (first speed) to a high speed (second speed), the forward projection area gradually changes from a small area to a large area due to the pushing force of the advancing soil.

[0060] In the second embodiment, the attachment of the second mounding body 43 to the rotating shaft A can be selected from a plurality of left and right relative position adjustment holes 431, which are attachment positions, to move the relative position of the second mounding body 43 to the left and right in the traveling direction of the rotating shaft A. In other words, the area of ​​both the left and right sides of the mounding body 43 sandwiching the rotating shaft A can be changed. In the second embodiment, the attachment of the fulcrum pipe 61 constituting the pivot axis A to the second mounding body 43 uses the two of the left-right relative position adjustment holes 431 with the fulcrum pipe 61 at the tip end closest to the cover body 4 of the second mounding body 43, which is the left side shown in Figure 18. Regarding the relative position with the second mounding body 43 when viewed from the front facing the surface of the second mounding body 43 of the pivot axis A, the area of ​​both sides in the width direction of the second mounding body 43 across the pivot axis A is set so that the area closer to the wheel rut is smaller and the area away from the wheel rut is larger. The pivot axis A of the second mounding body 43 is attached to the left side in Fig. 18, near the center in the width direction of the second mounding body 43 relative to the traveling direction of the cover body 4. Also, since the elastic member 71 is provided on the side closer to the wheel rut side, which is closer to the center in the width direction relative to the traveling direction in a plan view, a force is constantly applied to the side of the second mounding body 43 closer to the wheel rut side backward.

[0061] Also, in Figure 18, the area of ​​the second soil-piling body 43 on the right side of the fulcrum pipe 61 in the figure, that is, the area on the side away from the cover body 4 forward, i.e., the area on the side where the second soil-piling body 43 moves away from the pivot axis A, is larger than the area on the left side of the figure, that is, the area on the side closer to the cover body 4L, i.e., the area on the side where the second soil-piling body 43 moves closer to the pivot axis A. Therefore, the second mounding body 43 receives more pressure from the soil on the left side in the direction of travel, which is the right side in the figure. When soil collides with the second mounding body 43 as the tillage implement 1 advances, the collision force causes the second mounding body 43 to rotate counterclockwise to the left, with the pivot axis A as the center of rotation. In other words, the inclination angle of the second mounding body 43 in a plan view rotates from one side in which it stands facing forward, which is perpendicular to the front end of the cover body 4 shown by the two-dot chain line in Figure 18, to the other side in which it leans parallel to the front end of the cover body 4 shown by the solid line.

[0062] As the traveling speed increases, the force of collision with the mounding body (second mounding body 43) also increases. The force of the collision causes the mounding body (second mounding body 43) to rotate to the other side around the pivot axis A. When this rotation force to the other side becomes greater than the biasing force of the elastic member 71 biasing it to one side, the second mounding body 43 begins to rotate. In the second embodiment, the second mounding body 43 rotates counterclockwise, that is, to the left, when viewed in a plane.

[0063] Conversely, when the traveling speed decreases, the force of the soil collision also decreases, so the biasing force of the elastic member 71 biasing in one direction causes the mounding body (second mounding body 43) to rotate so as to return to its original position on one side. In the second embodiment, the second mounding body 43 rotates clockwise, to the right, with the pivot axis A as the rotation center. As shown in Figure 18, which is an enlarged plan view of the mounding body of the tillage machine according to the second embodiment of the present invention, the portion drawn in solid lines of the second mounding body 43 and the regulating piece 64, which is the regulating part, indicates high speed (after rotation), and the portion drawn in dashed double-dashed lines indicates low speed (before rotation). That is, the direction in which the second mounding body 43 will rotate at high and low speeds is determined by the attachment position of the pivot axis A and the hole 431 for adjusting the left and right relative position with the fulcrum pipe 61 in the second mounding body 43. The position of the second mounding body 43 relative to the pivot axis A determines the direction in which the second mounding body 43 will rotate when it encounters resistance from the soil. Depending on the relative positions of the pivot axis A and the second mounding body 43, the size of the left and right areas of the second mounding body 43 with respect to the fulcrum axis A when viewed from the surface along which the soil flows determines which side receives a larger area of ​​resistance from the soil as the working machine advances. When the moving speed increases, the second mounding body 43 rotates backwards on the side that is more susceptible to resistance from the soil, that is, the side that is longer in plan view or has a larger area.

[0064] The range within which the earth-pile body (second earth-pile body 43) can turn is limited by the regulating body 64, so the earth-pile body (second earth-pile body 43) can be prevented from continuing to turn. Therefore, the direction of earth movement can be kept facing the ruts, so the work of removing the ruts can be carried out without interruption. Since the elastic member 71 is always biased in one rotation direction, it can be returned to its original position when the soil collision ceases or the soil collision force decreases. Also, by adjusting the mounting position, material, shape, etc. of the elastic member 71, the biasing force can be adjusted to adjust the strength of the soil collision.

[0065] In the second embodiment, when the working speed is low (first speed), for example, about 1 to 3 km / h, the mark-removing surface of the mounding body (second mounding body 43) is directed toward the center of the wheel groove, reducing the forward projection area and moving the soil into the wheel groove little by little. When the working speed is high (second speed), for example, about 3 to 6 km / h, the mark-removing surface of the second mounding body 43, which is a mounding body, can be directed from the center of the wheel groove to the front side in the direction of travel, allowing more soil to be moved into the wheel groove. That is, the forward projection area of ​​the second mounding body 43 is made small when the working speed is low, and made large when the working speed is high. When the working speed is high, the soil pushed aside by the traveling body is generated in greater quantities by the momentum of the traveling speed than when the working speed is low, so by making the forward projection area large, the soil can be moved efficiently.

[0066] A third embodiment of the present invention shown in Fig. 19 will be described. In the third embodiment, a second mounding body 43 having the following structure is provided to the first embodiment. The first mounding body 42 and the third mounding body 44 may also have the same structure. In FIG. 19, the second mounding body 43 shown by a solid line indicates the time of low speed, and the second mounding body 43 shown by a two-dot chain line indicates the time of high speed. In the third embodiment, the fulcrum pipe 61 constituting the pivot axis A is attached to the second mounding body 43 using two of the left and right relative position adjustment holes 431 at the tip end of the second mounding body 43 away from the cover body 4, which is the right side shown in Figure 19. When viewed from the front facing the surface of the second mounding body 43, with regard to the relative position between the pivot axis A and the second mounding body 43, the areas on both sides of the width of the second mounding body 43 sandwiching the pivot axis A are larger on the side closer to the wheel rut and smaller on the side away from the wheel rut.

[0067] In the third embodiment, the elastic member 71 is made of a compression spring. The elastic member 71 biases the second mounding body 43, which is a mounding body that can be rotated about the rotation axis A, in one rotation direction. In the third embodiment, the elastic member 71 acts as a compression spring that applies a force to rotate the end of the second mounding body 43 on the wheel rut side in a direction away from the front end of the cover body 4 forward, that is, in one rotation direction. In the third embodiment, the elastic member 71 is bridged between the pivot shaft side protruding piece 63 provided on the upper collar 66 and the cover body side protruding piece 46 provided on the mounting base 47 or the cover body 4. A force is applied to the mounding body (second mounding body 43) so as to rotate it to one side via the upper collar 66 and the fulcrum pipe 61. In the embodiment, a compression spring is shown, but the elastic member 71 may also be a tension spring, a coil spring, or a fluid pressure-based spring arranged to rotate it to one side.

[0068] The telescopic rod 72 is disposed at the center of the elastic member 71 in the third embodiment, and serves to guide the elastic member 71. In the third embodiment, the attachment position of the pivot axis A to the second mounding body 43 can be selected from the attachment position, which is the hole 431 for adjusting the left and right relative position with the fulcrum pipe, so that the area of ​​both sides of the mounding body 43 on either side of the pivot axis A can be changed. In the third embodiment, the fulcrum pipe 61 that constitutes the pivot axis A is attached to the second mound body 43 using two of the left-right relative position adjustment holes 431, which are located on the right side as shown in Figure 19, at the end farthest from the cover body 4L of the second mound body 43.

[0069] Therefore, the pivot axis A of the second soil-collecting body 43 is attached to the side of the second soil-collecting body 43 away from the cover body 4, which is the right side shown in FIG. The relative mounting position relationship between the second mounding body 43 and the pivot axis A when viewed from the surface along which the soil of the second mounding body 43 moves is such that the pivot axis A is positioned at a location offset to the side from the center to avoid the center of the second mounding body 43. Note that in plan view, the middle of the surface along which the soil of the second mounding body 43 moves corresponds to the center of the four holes of the relative position adjustment holes 431. When viewed from the surface along which the soil of the second soil-pile body 43 moves, the area of ​​the side closer to the cover body 4, which is the area to the left of the fulcrum pipe 61, which is the actual fulcrum axis A, is larger than the area of ​​the side away from the cover body 4, which is the area to the right of the fulcrum pipe 61.

[0070] Therefore, the second mounding body 43 receives more pressure from the soil on the left side in the figure, which has a larger area. When soil collides with the second mounding body 43 as the tillage implement 1 advances, the collision force causes the second mounding body 43 to rotate clockwise to the right, with the pivot axis A as the center of rotation. That is, the inclination angle of the second mounding body 43 in a plan view rotates from one side, in which it is tilted parallel to the front end of the cover body 4 shown by the solid line in Figure 19, to the other side, in which it is upright and facing forward, perpendicular to the front end of the cover body 4 shown by the two-dot chain line. The other configurations of the third embodiment are the same as those of the second embodiment.

[0071] As the traveling speed increases, the force of collision with the mounding body (second mounding body 43) also increases. The force of the collision becomes a force that rotates the mounding body (second mounding body 43) to the other side around the pivot axis A. When this rotation force to the other side becomes greater than the biasing force of the elastic member 71 biasing it to one side, the second mounding body 43 begins to rotate. In the third embodiment, the second mounding body 43 rotates clockwise.

[0072] Conversely, when the traveling speed decreases, the force of the soil collision also decreases, so the biasing force of the elastic member 71 biasing in one direction causes the mounding body (second mounding body 43) to rotate so as to return to its original position on one side. In the third embodiment, the second mounding body 43 rotates counterclockwise to the left with the pivot axis A as the rotation center. As shown in Figure 19, which is an enlarged plan view of the mounding body of the tillage machine according to the third embodiment of the present invention, the portion drawn by solid lines of the second mounding body 43 and the regulating body 64, which is the regulating part, indicates the state at low speed (before rotation), and the portion drawn by dashed double-dashed lines indicates the state at high speed (after rotation).

[0073] The rotation range of the earth-pile body (second earth-pile body 43) is limited by the regulating body 64, so the earth-pile body (second earth-pile body 43) can be prevented from continuing to rotate. Therefore, the direction of soil movement can be kept facing the ruts, so the mark removal work can be carried out without interruption.

[0074] The elastic member 71 is always biased in one rotation direction, so it can return to its original position when the soil collision is over. Also, by adjusting the mounting position, material, shape, etc. of the elastic member 71, the biasing force can be adjusted to adjust the intensity of soil collision. In the third embodiment, by changing the relative positional relationship between the mound body and the rotating axis A, or by changing the type and positional relationship of the elastic member 71, when the working speed changes from low to high, the forward projection area can be gradually changed from large to small.

[0075] In the third embodiment, when the working speed is low (first speed), for example, at about 1 to 3 km / h, the mark-removing surface of the mounding body (second mounding body 43) is directed toward the center of the wheel groove, increasing the forward projection area and actively moving the soil into the wheel groove. When the working speed is high (second speed), for example, about 3 to 6 km / h, the soil moving surface of the second soil-pile body 43, which is a soil-pile body, can be directed to the side of the traveling direction, and the soil can be gradually moved into the wheels along the traveling direction. That is, when the working speed is low, the frontal projection area of ​​the second mounding body 43, which is a mounding body, is made large, and when the working speed is high, the frontal projection area is made small.

[0076] The mounding body (second mounding body 43) in the third embodiment is effective when the viscosity of the soil is low due to the soil quality and moisture content. In the case of low-viscosity soil, ruts are formed by the traveling body, but the weight of the soil itself and the flow of moisture move the soil into the grooves of the ruts. Therefore, the amount of soil pushed aside beside the ruts is small, and the ruts do not become deep. At low speed (first speed), the viscosity of the soil is low and the soil movement efficiency is often poor, so the soil is rotated to increase the forward projection area to actively ensure the amount of soil to be moved. On the other hand, if the soil is moved vigorously toward the ruts at high speed (second speed), the soil is in a highly fluid state and the moved soil may go over the ruts. To avoid this, at high speed, the soil is rotated to reduce the forward projection area and the soil piler (second soil piler 43) is rotated so that the flow of the moving soil is aligned with the direction of travel, which prevents the soil from going over the ruts. In other words, the soil piler in the third embodiment can effectively move the soil into the ruts and level the soil.

[0077] In the fourth embodiment, the plan view of which is shown in FIG. 20, the elastic member 71 is made of a tension spring. The elastic member 71 biases the second mounding body 43, which is a mounding body that can be rotated about the rotation axis A, in one rotation direction. In the fourth embodiment, the elastic member 71 acts as a tension spring that pulls the end of the second mounding body 43 on the wheel side forward, that is, in the direction away from the front end of the cover body 4.

[0078] In the fourth embodiment, of the left-right relative position adjustment holes 431, the two holes on the end side of the second pileator 43 farther from the cover body 4, which is the right side shown in FIG. 20, are used. Therefore, the rotation axis A of the second soil-collecting body 43 is attached to the side of the second soil-collecting body 43 away from the cover body 4, which is the right side as shown in FIG. The relative mounting position relationship between the second mounding body 43 and the pivot axis A when viewed from the surface along which the soil of the second mounding body 43 moves is such that the pivot axis A is positioned at a location offset to the side from the center to avoid the center of the second mounding body 43. Note that in plan view, the middle of the surface along which the soil of the second mounding body 43 moves corresponds to the center of the four holes of the relative position adjustment holes 431.

[0079] Therefore, when viewed from the surface along which the soil of the second soil-pile body 43 moves, the area of ​​the side close to the cover body 4, which is the area to the left of the fulcrum pipe 61, which is the actual fulcrum axis A, is larger than the area of ​​the side away from the cover body 4, which is the area to the right of the fulcrum pipe 61. Therefore, the second mounding body 43 receives more pressure from the soil on the left side in the figure, which has a larger area. When soil collides with the second mounding body 43 as the tillage implement 1 advances, the collision force causes the second mounding body 43 to rotate clockwise to the right, with the pivot axis A as the center of rotation. That is, the inclination angle of the second mounding body 43 in a plan view rotates from one side, in which it is tilted parallel to the cover body 4 as shown by the solid line in Figure 20, to the other side, in which it is upright and facing forward, perpendicular to the front end of the cover body 4 as shown by the two-dot chain line. The other configurations of the fourth embodiment are the same as those of the second and third embodiments.

[0080] As the traveling speed increases, the force of collision with the mounding body (second mounding body 43) also increases. The force of the collision acts to rotate the mounding body (second mounding body 43) to the other side around the pivot axis A. When this rotation force to the other side becomes greater than the biasing force of the elastic member 71 biasing it to one side, the second mounding body 43 begins to rotate. In the fourth embodiment, the second mounding body 43 rotates clockwise.

[0081] Conversely, when the traveling speed decreases, the force of the soil collision also decreases, so the biasing force of the elastic member 71 biasing in one direction causes the mounding body (second mounding body 43) to rotate so as to return to its original position on one side. In the third embodiment, the second mounding body 43 rotates counterclockwise to the left with the pivot axis A as the rotation center. As shown in Figure 20, which is an enlarged plan view of the mounding body of the tillage machine according to the fourth embodiment of the present invention, the portion drawn by solid lines of the second mounding body 43 and the regulating body 64, which is the regulating part, indicates the state at low speed (before rotation), and the portion drawn by dashed double-dashed lines indicates the state at high speed (after rotation).

[0082] The range in which the earth-pile body (second earth-pile body 43) can turn is limited by the regulating body, so the earth-pile body (second earth-pile body 43) can be prevented from continuing to turn. Therefore, the direction of earth movement can be kept facing the ruts, so the work of removing the ruts can be carried out without interruption.

[0083] The elastic member 71 is always biased in one rotation direction, so it can return to its original position when the soil collision is over. Also, by adjusting the mounting position, material, shape, etc. of the elastic member 71, the biasing force can be adjusted to adjust the intensity of soil collision.

[0084] In the fourth embodiment, the forward projection area can be gradually changed from large to small when the working speed changes from low to high by changing the relative positional relationship between the mounding body and the rotating shaft A, and by changing the type and positional relationship of the elastic member 71. The action and effects generated by the mounding body in the fourth embodiment are the same as those in the third embodiment, so a description thereof will be omitted.

[0085] In the fourth embodiment, in a plan view, the second mounding body 43, which is a mounding body located on the side of the rut, the pivot A for pivoting the mounding body, and the elastic member 71 are arranged in the direction of travel and width from the rut to be backfilled. In contrast, in the second and third embodiments, the second mounding body 43 located on the side of the rut is arranged next to the elastic member 71, and the pivot A is arranged next to it. In the fourth embodiment, the elastic member 71 is arranged in a position away from the rut. Furthermore, the fulcrum pipe 61, which is the pivot A, is located between the elastic member 71 and the rut. Therefore, mud splashes that may be generated from the rut during backfilling are unlikely to reach the elastic member 71, and since the elastic member 71 is arranged behind the fulcrum pipe 61 from the rut, it is possible to prevent mud splashes from directly hitting the elastic member 71.

[0086] In the second, third and fourth embodiments, the attachment position of the pivot axis A to the second mounding body 43 can be selected from the hole 431 for adjusting the left and right relative position with the fulcrum pipe, thereby making it possible to change the area of ​​both sides of the mounding body 43 on either side of the pivot axis A. In the second embodiment, the fulcrum pipe 61 that constitutes the pivot axis A is attached to the second soil-piling body 43 using the two of the holes 431 for adjusting the left-right relative position with the fulcrum pipe 61, located at the tip end of the second soil-piling body 43 closest to the cover body 4, which is the left side shown in Figure 18.

[0087] In the third embodiment, the fulcrum pipe 61 that constitutes the pivot axis A is attached to the second mound body 43 using two of the holes 431 for adjusting the left-right relative position with the fulcrum pipe, which are located on the right side as shown in Figure 19, at the end farthest from the cover body 4L of the second mound body 43.

[0088] In the fourth embodiment, the fulcrum pipe 61 that constitutes the pivot axis A is attached to the second soil-piling body 43 using two of the holes 431 for adjusting the left-right relative position with the fulcrum pipe 61, which are located on the right side as shown in Figure 20, at the end farthest from the cover body 4 of the second soil-piling body 43. By selecting the fulcrum pipe 61 that constitutes the pivot axis A and the second soil-piling body 43 via the left-right relative position adjustment hole 431 with respect to the fulcrum pipe 61, it is possible to select the position of the pivot axis A on the second soil-piling body 43, thereby varying the area of ​​the second soil-piling body 43 from the pivot axis A to the cover body 4 and the area on the side away from the cover body 4. Therefore, when the second soil-pile body 43 comes into contact with the soil and is pressed, the side on which the soil presses more is adjusted. The greater the pressure of the soil, the greater the pressure, so the surface that comes into contact with the soil and receives the greater soil pressure rotates so as to approach the second soil-pile body 43 side. Therefore, the direction of rotation can be selected by determining where on the second mound body 43 the pivot axis A is attached.

[0089] In this embodiment, four holes 431 for adjusting the left and right relative positions with the fulcrum pipe are provided, and two of each are used to fix the second mound body 43 and the rotating axis A, but if more are used, it is possible to further change the moving distance and moving speed.

[0090] In the second, third and fourth embodiments, the mechanism of the invention is incorporated into the second mound 43, but it may also be incorporated into the first mound 42 and the third mound 44. Moreover, the mounding body (second mounding body 43) in the second and third embodiments may be provided on the left extended working body 11L or the right extended working body 11R, which are side working bodies other than the central working body 11. Also, it may be provided on a working body consisting of only the central working body 11 (so-called working machine without a folding mechanism). [Explanation of symbols]

[0091] 1. Plowing machine (traveling body) 3 Crushing section 32 Cultivating Claw 43 Second earth pile (earth pile) 431 Hole for adjusting the relative left and right position with respect to the support pipe (mounting position) 64 Regulatory Body 71 Elastic Members A Swivel Axis

Claims

1. A soil crushing unit located behind the traveling body and crushing the soil by rotating the tilling claws as the traveling body advances; A soil-collecting body is arranged behind the traveling body in the traveling direction and forward of the soil crushing section in the traveling direction, and is capable of moving soil to the traveling trace formed by the traveling body to erase the traveling trace; A rotating shaft that can rotate the soil collector clockwise and counterclockwise horizontally by collision with soil as the soil collector advances, The soil-pile body has a first soil-pile body and a second soil-pile body of the same structure that are installed opposite each other across the width of a rut formed in a field by the tilling machine 1, which is a traveling machine body, and is biased in one turning direction by an elastic member, The mounting position of the rotating shaft on the soil-collecting body is set at a position shifted laterally from the center of the left and right width of the soil-collecting body, and the area of ​​each surface in contact with the soil on both sides of the soil-collecting body sandwiching the rotating shaft is changed. A tilling machine characterized by the above.

2. A soil crushing unit located behind the traveling body and crushing the soil by rotating the tilling claws as the traveling body advances; A soil-collecting body is disposed behind the traveling direction of the traveling body and ahead of the traveling direction of the soil-crushing section, and is capable of moving soil to the traveling trace formed by the traveling body to erase the traveling trace, and has a surface that is inclined backward as it approaches the traveling trace in a plan view; A pivot shaft capable of rotating the soil-removing body in a horizontal direction by collision with soil as the soil-removing body advances, The mounting position of the rotating shaft on the soil-retaining body is set at a position where the area of ​​the side away from the travel trace from the rotating shaft is larger than the area of ​​the side close to the travel trace. A tilling machine characterized by the above.

3. A tilling machine as described in any one of claims 1 to 2, characterized in that the pressing force from the soil received by each of the surfaces on both sides of the mound body sandwiching the attachment position of the pivot shaft to the mound body is changed.

4. The soil-collecting body is configured to be movable in the vertical direction by the rotating shaft, and the soil-collecting body can be fixed at any position in the vertical direction, and is detachable.

3. A tilling implement according to claim 1 or 2.

5. The tilling machine includes a central work body and a side work body which is an extension of the central work body, The soil collector is provided on the central working body.

3. A tilling implement according to claim 1 or 2.

6. The tilling machine includes a central work body and a side work body which is an extension of the central work body, The soil collector is provided on the side working body.

3. A tilling implement according to claim 1 or 2.

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