WO2020026723A1

WO2020026723A1 - Wheel track eraser and work vehicle

Info

Publication number: WO2020026723A1
Application number: PCT/JP2019/027205
Authority: WO
Inventors: 土井　邦夫
Original assignee: ヤンマー株式会社
Priority date: 2018-08-02
Filing date: 2019-07-09
Publication date: 2020-02-06
Also published as: JP2020018248A; JP7034859B2

Abstract

The present invention suitably erases wheel tracks. The present invention is provided with a device body (11) that can be linked to the rear side of a work vehicle. The device body (11) is provided with pairs of left and right earth collectors (12) that are disposed in a diagonal orientation so as to approach each other in the left-right direction of the work vehicle toward the rear side thereof. Defining one pair of left and right earth collectors (12) as one earth collector pair, a plurality of earth collector pairs (12a–12c) are provided in a state wherein a plurality of the earth collectors (12) on the left side are arranged with a gap therebetween in the left-right direction of the work vehicle and a plurality of the earth collectors (12) on the right side are disposed with a gap therebetween in the left-right direction of the work vehicle. The plurality of earth collector pairs (12a–12c) are configured so as to have different lengths in the front-back direction of the work vehicle.

Description

Wheel mark eraser and work vehicle

The present invention relates to a wheel mark erasing device for erasing wheel marks of a work vehicle, and a work vehicle provided with the wheel mark erasing device.

The wheel mark erasing device as described above is connected to the rear side of the work vehicle, and is provided with a pair of left and right burrowers spaced apart in the left-right direction of the work vehicle (for example, see Patent Documents 1 and 2). . The pair of left and right mulching bodies are provided in an inclined posture in which the rear part in the left and right direction of the work vehicle approaches each other. In this way, the soil is brought to the location where the wheels have passed by the pair of left and right soil putting bodies, thereby eliminating wheel marks.

Japanese Utility Model Publication No. 54-97406 Japanese Utility Model Publication No. 58-18402

装置 In the devices described in

Patent Documents

1 and 2, since a pair of left and right mulching bodies are provided one by one, it is necessary for one mulling body to bring sufficient soil to the location where the wheel has passed. However, for example, the soil at a work site such as a field is hard, and it may be difficult to put enough soil with a burrower, which may cause inconvenience such as leaving wheel marks.

In view of this situation, a main object of the present invention is to provide a wheel mark erasing device capable of appropriately erasing a wheel mark, and a work vehicle provided with the wheel mark erasing device.

A first characteristic configuration of the present invention is provided with a device body that can be freely connected to a rear side of a work vehicle,
The main body of the device is provided with a pair of left and right sloping bodies that are closer to each other in the left and right direction of the work vehicle toward the rear side portion,
With the pair of left and right mulching bodies as one mulling body, a plurality of left mulching bodies are arranged at intervals in the left-right direction of the work vehicle, and the right mulling body is arranged at intervals in the left-right direction of the working vehicle. In the state of being arranged side by side, a plurality of anti-shoulder bodies are provided,
The plurality of body approaching bodies are configured so that the lengths in the front-rear direction of the work vehicle are different from each other.

According to this configuration, a plurality of left mulching bodies are arranged at intervals in the left-right direction of the working vehicle, and a plurality of right mulling bodies are arranged at intervals in the left-right direction of the working vehicle. Since a plurality of soil contacting bodies are provided, the degree of crushing the soil by the plurality of soil contacting bodies can be changed, and the soil can be approached toward the wheel passing position side. In addition, since the plurality of body approaching bodies have different lengths in the front-rear direction of the work vehicle, for example, by increasing the length in the front-rear direction as the distance from the passing position of the wheels increases. The soil can be appropriately brought to the passing position side of the wheel by each of the plurality of soil approaching bodies. For example, since the distance to the passing position of the anti-shoulder located closest to the passing position of the wheel is short, the distance for breaking the soil is short, and the degree of breaking the soil is rough. On the other hand, the crushing body positioned second closest to the passing position can reduce the degree of crushing the soil as the distance to the passing position increases. In this way, by providing a plurality of soil approaching bodies having different distances to the passing position of the wheel, the soil can be brought closer to the passing position of the wheel while gradually reducing the degree of crushing the soil. In addition, since the soil is collected by the plurality of soil collecting bodies, a sufficient amount of soil can be secured.

From the above, for example, even when the soil at the work site such as a field is hard, the finely crushed soil can be brought closer to the passing position side of the wheel, and the amount of the brought soil is also a sufficient amount. Since it can be secured, the wheel trace can be appropriately erased.

A second characteristic configuration of the present invention is that the device main body is provided with a leveling body for leveling the soil collected by the soil collecting body,
The terrain body is provided with an inclined portion that is inclined toward the rear side and is located on the lower side and extends rearward, and a horizontal portion that extends rearward along the horizontal direction following the inclined portion. On the point.

According to the present configuration, by providing the leveling body, the soil approaching the wheel passing position side by the earthing body can be leveled, and the wheel marks can be appropriately erased. Since the leveling body is provided with the inclined portion, it is possible to suppress the approached soil from moving above the leveling body and move a sufficient amount of soil to the lower side of the leveling body. Thus, the soil moved to the lower side of the terrain at the inclined portion can be appropriately leveled at the horizontal portion, and the wheel marks can be erased cleanly.

A third characteristic configuration of the present invention is that each of the plurality of anti-shoulder bodies is arranged in a state extending in the front-rear direction of the work vehicle, between the inclined part and the horizontal part of the terrain body,
At the bottom of each of the plurality of anti-shoulder bodies, a front-side inclined portion that is inclined toward the rear side and extends rearward and is inclined toward the rear side, and a rear-side portion is inclined while positioned closer to the upper side. And a rear inclined portion extending rearward.

According to this configuration, the burrower is arranged in a state extending in the front-rear direction between the inclined part and the horizontal part of the terrain body, so that the burrower works toward the passing position of the wheel by the burrower and the soil by the terrain body. It is possible to effectively exert both of the effects of equalizing. By providing the front inclined portion and the rear inclined portion at the bottom of the mulch, the movement of the soil in the left-right direction can be allowed to some extent. Thereby, for example, it is possible to perform the mulching to the wheel passing position side without obstructing the soil brought to the other mulching body to move to the wheel passing position side, and to perform the trace of the mulching body itself. Can be suppressed.

A fourth characteristic configuration of the present invention is that each of the plurality of anti-shoulder bodies is provided swingably in the left-right direction of the work vehicle with a front end portion as a fulcrum,
The present invention is characterized in that a connection fixing portion is provided, which is connected across a plurality of the soil approaching bodies and is fixed to the apparatus main body.

According to this configuration, each of the plurality of body approaching bodies is swingable in the left-right direction with the front end as a fulcrum, and the connection fixing portion is connected across the plurality of body approaching bodies. By moving the connection fixing portion, the plurality of body approaching bodies can be swung in the left-right direction. Accordingly, it is possible to change the inclination angle of the inclination posture in each of the plurality of body approaching bodies simply by moving the connection fixing part, and it is possible to simplify the operation of adjusting the inclination angle.

According to a fifth aspect of the present invention, there is provided a work vehicle provided with the wheel mark erasing device according to any one of the first to fourth aspects,
On the rear side of the work vehicle, from the front side, the wheel mark erasing device and the direct sowing device are provided so as to be freely connected in a state where the wheel mark erasing device and a direct sowing device for directly sowing seeds on a work site are arranged in this order. It is in the point.

According to this configuration, the direct sowing operation can be performed by connecting the wheel mark erasing device and the direct sowing device to the rear side of the work vehicle without preparing a dedicated direct sowing machine. In addition, since the wheel trace eraser and the direct sowing device are arranged in this order from the front side on the rear side of the work vehicle, the wheel trace is appropriately erased by the wheel trace eraser, and then the work site is removed by the direct sowing device. Since the seeds can be directly sowed, the direct sowing operation can be performed efficiently and appropriately while preventing inconvenience such as directly sowing the seeds on the wheel marks.

Side view of the working vehicle with the wheel mark erasing device and the direct sowing device connected Top view of work vehicle with wheel mark erasing device and direct seeding device connected View of the wheel mark eraser seen from below A perspective view showing a part of the wheel mark eraser. The perspective view which shows the whole outline of a wheel trace eraser. Side view of the unit body in the direct sowing device Front view of unit body in direct sowing device Side view showing the main part of the feeding section Partial sectional view showing the main part of the feeding section Plan view showing multiple anti-yielding objects The figure which shows the state of the direct sowing work by the direct sowing device Perspective view of a wheel mark erasing device according to a second embodiment.

An embodiment in a state where a wheel mark erasing device and a direct seeding device according to the present invention are connected to a rear side of a work vehicle will be described with reference to the drawings.
[First Embodiment]
As shown in FIGS. 1 and 2, the wheel mark erasing device 10 is configured to be freely connectable to a rear side of a tractor 1 as a working vehicle. On the rear side of the tractor 1, not only the wheel mark erasing device 10, but also a direct sowing device 30 for directly sowing seeds on a work site such as a field is configured to be freely connectable. On the rear side of the tractor 1, a wheel mark erasing device 10 and a direct sowing device 30 are arranged in this order from the front side. Although the tractor 1 is applied as a work vehicle, the present invention is not limited to the tractor 1 and can be applied to other work vehicles.

As shown in FIGS. 1 and 2, the front of the vehicle body 2 of the tractor 1 is supported by a pair of left and right front wheels 3, and the rear of the vehicle body 2 is supported by a pair of left and right rear wheels 4. A three-point link mechanism including a pair of left and right lower links 5 and an upper link 6 is provided at a rear portion of the vehicle body 2 of the tractor 1, and the three-point link mechanism is integrated with a wheel mark erasing device 10 and a direct seeding device 30. It is configured so as to be freely connected to. A lifting device (not shown) having a hydraulic device such as a lifting cylinder is provided at a rear portion of the vehicle body portion 2 of the tractor 1, and the three-point link mechanism is raised and lowered by the lifting device to thereby remove the wheel mark erasing device 10. And the direct seeding device 30 can be moved up and down.

As described above, the rear side of the tractor 1 is provided with a connection mechanism such as a three-point link mechanism capable of freely connecting various devices. Therefore, while using the connection mechanism, the wheel mark erasing device 10 and the direct seeding device 30 are used. Can be mounted on the tractor 1. Thereby, it is possible to perform a direct sowing operation of directly sowing seeds on a work site such as a field while effectively using the tractor 1 without preparing a dedicated direct sowing machine.

In the following description, the left-right direction of the wheel mark erasing device 10 and the direct sowing device 30 is the same direction as the left-right direction of the tractor 1, and is simply referred to as “left-right direction”. The front-rear direction of the wheel mark erasing device 10 and the direct seeding device 30 is the same direction as the front-rear direction of the tractor 1, and is simply referred to as “front-rear direction”. The left side in the left-right direction indicates the left side when the tractor 1 is traveling forward, and the right side in the left-right direction indicates the right side when the tractor 1 is traveling forward. The outer side in the left-right direction indicates the outer side of the tractor 1 in the left-right direction, and the inner side in the left-right direction indicates the inner side of the tractor 1 in the left-right direction.

As shown in FIGS. 1 and 2, the wheel mark erasing device 10 includes a device body 11 that can be connected to the rear side of the tractor 1, and the device body 11 includes a plurality of burrowers 12 and a leveling body 13. Provided. The wheel mark erasing device 10 is configured to collect soil by a plurality of burrowers 12 in a lateral direction toward a passing position of a wheel (for example, the rear wheel 4) and level the soil brought by the terrain body 13, so that I try to erase the trace.

As shown in FIG. 5, the apparatus main body 11 is configured by combining a plurality of square pipe-shaped frames of first to eighth frames F1 to F8. Incidentally, FIG. 5 shows a state where the wheel mark erasing device 10 is lifted from the ground of the work site, and the upper link 6 and the like of the tractor 1 are omitted. The first frame F1 is disposed on the lower front side and is provided in a posture extending in the left-right direction. The second frame F2 is disposed on the upper front side, and is provided in a posture extending in the left-right direction similarly to the first frame F1. The first frame F1 and the second frame F2 are provided in parallel with a space therebetween in the vertical direction, and the first frame F1 is configured to be longer than the second frame F2. As shown in FIG. 1, the first frame F1 is configured to be freely connectable to a pair of left and right lower links 5 using a pin or the like via a first connecting portion R1 (see FIG. 3). Is configured to be freely connected to the upper link 6 via a second connecting portion R2 (see FIG. 3) using a pin or the like.

As shown in FIG. 5, a third frame F3 and a fourth frame F4 are provided as frames connecting the first frame F1 and the second frame F2. The third frame F3 is provided with a pair of left and right sides, and connects the middle part of the first frame F1 and the middle part of the second frame F2 in a standing posture extending in the vertical direction. The pair of left and right third frames F3 are arranged at symmetrical positions about the center in the left and right direction. The fourth frame F4 is also provided with a pair of left and right sides, and connects the end of the first frame F1 and the end of the second frame F2 in an inclined posture that is located on the outer side in the left-right direction toward the lower side.

As shown in FIG. 5, the fifth frame F5 is provided with a pair of left and right frames extending rearward from respective lower portions of the pair of left and right third frames F3. The sixth frame F6 is provided with a pair of left and right erected postures extending upward from rear portions of the pair of left and right fifth frames F5. The seventh frame F7 is provided in a posture extending in the left-right direction, and connects the upper ends of the sixth frame F6. The eighth frame F8 extends in the front-rear direction and connects the center of the second frame F2 and the center of the seventh frame F7 in the left-right direction. The seventh frame F7 is disposed below the second frame F2 in the up-down direction, and the eighth frame F8 has a tilted posture that is located closer to the rear as viewed from the side.

As shown in FIG. 1 and FIG. 5, in the apparatus main body 11, since the mulling body 12 is arranged on the lower surface side (back side) of the grading body 13, first, the grading body 13 will be described. The body 12 will be described.

As shown in FIG. 2, the terrain body 13 has a predetermined length in both the front-rear direction and the left-right direction, and is made of a metal plate having a rectangular shape in plan view. As shown in FIG. 4 and FIG. 5, the leveling body 13 has a front end connected to the first frame F1 and is provided in a posture extending rearward from the first frame F1. At the front end of the terrain body 13, a first mounting plate 14 extending forward is provided, and the first mounting plate 14 is connected and fixed to the first frame F1 by a connecting tool B such as a bolt and nut. Incidentally, the connection between the ground preparation body 13 and the first frame F1 can be fixed by welding or the like.

As shown in FIGS. 3 and 4, the terrain body 13 includes a left terrain body 13a disposed on the left side (the right side in FIG. 3 and the upper side in FIG. 4) and the right side (the left side in FIG. It is formed in a rectangular shape (see FIG. 2) in a plan view by combining three terrain bodies, that is, a right terrain body 13b disposed on the lower side) and a central terrain body 13c disposed in the center. The center terrain 13c is configured to be freely attached to and detached from the left terrain 13a and the right terrain 13b (device body 11). In the left-right direction, the end of the central terrain body 13c, the end of the left terrain body 13a, and the end of the central terrain body 13c and the end of the right terrain body 13b are superimposed one on top of the other to form a connector B such as a bolt and nut. The center terrain 13c is attached to the left terrain 13a and the right terrain 13b. Incidentally, in FIG. 3, the connecting tool B is not shown. By removing the connecting tool B between the first mounting plate 14 and the central terrain body 13c, the central terrain body 13c can be removed from the left terrain body 13a and the right terrain body 13b. When the center terrain 13c is removed from the left terrain 13a and the right terrain 13b, a gap is formed between the left terrain 13a and the right terrain 13b.

2) As shown in FIG. 2 and FIG. 5, the terrain body 13 has a width extending in the left-right direction over the entire length of the first frame F1 longer than the entire length of the tractor 1. As shown in FIG. 5, the leveling body 13 includes, in order from the front side, an inclined portion 15 that inclines in a state where the rear side portion is located on the lower side and extends rearward, and a horizontal direction following the inclined portion 15. And a horizontal portion 16 extending rearward along the same. By providing the sloped portion 15, the front end of the terrain body 13 will be located at a higher position, and along the slope of the sloped portion 15 while suppressing the movement of the soil above the terrain body 13. To guide the soil backwards. The horizontal portion 16 has a length that is sufficiently longer in the front-rear direction than the inclined portion 15, and presses the soil guided by the inclined portion 15 from above at the horizontal portion 16, The soil is leveled.

As shown in FIG. 5, the mulch body 12 is disposed on the lower surface side (back surface side) of the terrain body 13, and extends from the front side to the rear side (upper side to lower side in FIG. 3) as shown in FIG. It is composed of a metal plate. The mulching body 12 includes a plurality of right mulling bodies 12 corresponding to the right rear wheel 4 of the tractor 1 and a plurality of left mulling bodies 12 corresponding to the left rear wheel 4. Since the plurality of right mulching bodies 12 and the plurality of left mulching bodies 12 have the same configuration, hereinafter, both the right mulling body 12 and the left mulling body 12 will be described as "mulling bodies 12".

As shown in FIG. 3, the mulch 12 has a pair of left and right mullers 12 as one muller, and a plurality of left mullers 12 are arranged side by side at intervals in the left-right direction. A plurality of body approaching bodies 12a to 12c are provided in a state in which a plurality of 12 are arranged side by side at intervals in the left-right direction. In the plurality of crushing bodies 12a to 12c, the left crushing bodies 12 are arranged so as to be adjacent to each other in the left-right direction, and the right mulling bodies 12 are arranged so as to be adjacent to each other in the left-right direction. Have been.

In this embodiment, three sets of the mulling bodies 12a to 12c are provided: a first set of mulling bodies 12a, a second set of mulling bodies 12b, and a third set of mulling bodies 12c. The center portion of the portion through which the rear wheel 4 passes in the left-right direction is defined as a reference position K, and from the side near the reference position K, a first set of crushed bodies 12a, a second set of crushed bodies 12b, and a third set of It is provided in a state of being arranged in the order of the anti-shoulder 12c. The plurality of burrowers 12a to 12c have the same or substantially the same length in the vertical direction.

As shown in FIG. 3, each of the plurality of soil approaching bodies 12 a to 12 c is provided in an inclined posture in which the closer to the rear part, the closer to each other. The pair of left and right mulching members 12 in each of the plurality of mulling members 12a to 12c are arranged symmetrically with respect to a reference position K, which is the center of a portion where the rear wheel 4 passes, in the left-right direction. Each of the plurality of soil approaching bodies 12a to 12c is provided such that the interval in the left-right direction becomes narrower toward the rear portion. The rear end portions of each of the plurality of soil approaching bodies 12a to 12c do not come into contact with each other, and the interval between the rear end portions is maintained at a predetermined interval (for example, the width of the rear wheel 4) or more.

As shown in FIG. 3 and FIG. 5, each of the plurality of crushing bodies 12 a to 12 c (the mulling body 12) is disposed so as to extend between the inclined portion 15 and the horizontal portion 16 of the leveling body 13 in the front-rear direction. I have. At the bottom of each of the plurality of mulching bodies 12a to 12c (the mulching body 12), a front-side inclined portion 17 that is inclined toward the rear side and extends rearward while being positioned lower, and a rear-side portion is higher. And a rear-side inclined portion 18 which is inclined in a state of being located on the side and extends rearward. The rear inclined portion 18 is formed so that the length in the front-rear direction is longer than the front inclined portion 17. As shown in FIG. 5, the front-side inclined portion 17 is formed such that the inclination angle with respect to the horizontal direction is larger than the rear-side inclined portion 18. For example, the rear end of the front inclined portion 17 is located at the same position or substantially the same position as the rear end of the inclined portion 15 of the terrain body 13 in the front-rear direction. Thus, in the front-rear direction, the front-side inclined portion 17 and the inclined portion 15 of the terrain body 13 in each of the plurality of mulling bodies 12a to 12c (the mulling body 12) are vertically overlapped, and The rear inclined portion 18 and the horizontal portion 16 of the leveling body 13 in each of the crushing bodies 12a to 12c (the mulling body 12) are vertically overlapped.

3) The plurality of soil approaching bodies 12a to 12c are configured such that lengths in the front-rear direction are different from each other, as shown in FIGS. Each of the plurality of body approaching bodies 12a to 12c has an inclined posture in which the rear side portion approaches the portion where the rear wheel 4 passes in the left and right direction, but at least in the front and rear direction only reaching the portion where the rear wheel 4 passes. Has a length of Of the plurality of body approaching bodies 12a to 12c, the one located closer to the reference position K, which is the center of the portion through which the rear wheel 4 passes, is set to have a shorter length in the front-rear direction. I have. Incidentally, in FIG. 10, in order to show the arrangement relationship between the rear wheel 4 and the plurality of crushed bodies 12a to 12c and the length of the plurality of crushed bodies 12a to 12c, the shapes of the plurality of crushed bodies 12a to 12c are shown. Indicates a schematic shape. In this embodiment, as shown in FIG. 10, the length L1 of the first set of anti-shoulder bodies 12a located closest to the reference position K is the shortest, and the length L1 is the second closest to the reference position K. The length L2 of the second set of crushed bodies 12b is the second shortest, and the length L3 of the third set of crushed bodies 12c located farthest from the reference position K is the longest. I have. In other words, the lengths of the plurality of body approaching bodies 12a to 12c are set so that the relationship of L1 <L2 <L3 is satisfied.

As shown in FIG. 3, each of the plurality of crushing bodies 12 a to 12 c (the mulling body 12) is provided so as to be swingable in the left-right direction with the front end as a fulcrum. A rotating shaft P extending downward is provided on the lower end surface of the first frame F1 so as to be rotatable around an axial center extending in the vertical direction, and the rotating shaft P is provided with a plurality of anti-shoulders 12a to 12c. Are connected and fixed at their front ends. Thus, by rotating the rotating shaft portion P about an axis extending along the vertical direction, it is possible to swing each of the plurality of soil contact members 12a to 12c (the soil contact members 12) in the left-right direction.

As shown in FIG. 3, the wheel mark erasing device 10 is provided with a connection fixing portion 19 that is connected across the plurality of soil approaching bodies 12a to 12c and fixed to the device main body 11. The connection fixing portion 19 is arranged between the soil burying body 12 and the terrain body 13 in the up-down direction, and has a plate shape extending in the left-right direction. A pair of left and right connection fixing portions 19 are provided corresponding to each of the pair of left and right burrowers 12. In this embodiment, the connection fixing portion 19 is located on the front side and is connected to the first to third sets of anti-shoulders 12a to 12c and is connected to the front connection fixing portion 19a. A rear-side connection fixing portion 19b is provided to be connected across the second and third sets of anti-shoulders 12b and 12c. As for the connection between the connection fixing portion 19 and the soil contact members 12a to 12c, the second mounting plate 20 provided on the soil contact members 12a to 12c and the connection fixing portion 19 are connected and fixed by a connecting tool B such as a bolt and a nut. ing. The connection fixing portion 19 is fixed to the apparatus main body 11 by being connected and fixed to the terrain body 13 by a connection tool B such as a bolt and a nut. In this embodiment, of the front connection fixing portion 19a and the rear connection fixing portion 19b, only the rear connection fixing portion 19b is connected and fixed to the terrain body 13 by the connecting tool B. Can also be connected and fixed to the terrain body 13 by the connecting tool B.

In this manner, as shown in FIG. 3, the plurality of body approaching members 12a to 12c are swingable in the left-right direction by the rotating shaft P, and are connected and fixed over the plurality of body approaching bodies 12a to 12c. Since the portions 19 are connected, by moving the connection fixing portion 19 in the left-right direction or the like of the wheel mark erasing device 10, it is possible to freely change the inclination angles of the plurality of burrowers 12a to 12c with respect to the front-back direction. Therefore, when adjusting the inclination angles of the plurality of burrs 12a to 12c with respect to the front-rear direction, the connection fixture B is removed, the connection fixing of the connection fixing portion 19 to the terrain body 13 is released, and the connection fixing portion 19 is moved to the wheel mark. The eraser 10 is moved in the left-right direction or the like. After that, the connection fixing portion 19 is connected and fixed to the terrain body 13 by the connection tool B. Incidentally, a hole for connecting and fixing is provided at a connecting and fixing portion of the leveling body 13 by the connecting tool B. By providing a plurality of connection fixing holes, or by forming the connection fixing holes in a long hole shape, even if the inclination angles of the plurality of burrowers 12a to 12c are changed, the earth preparation body 13 can be formed. The connection fixture B can be connected and fixed by the connection tool B.

The direct sowing device 30 is connected and fixed to the rear side of the wheel mark erasing device 10 as shown in FIGS. 1 and 2. A third connecting portion R3 and a fourth connecting portion R4 are provided for connecting and fixing the direct sowing device 30 behind the wheel mark erasing device 10. The third connecting portion R3 is attached to the rear surface of the seventh frame F7 in the apparatus main body 11 in a posture extending in the up-down direction. The third connecting portion R3 is provided as a pair of left and right wheels at an interval in the left-right direction of the wheel mark erasing device 10 and the direct sowing device 30. The fourth connecting portion R4 is attached to the pair of left and right third connecting portions R3 so as to extend in the left-right direction of the wheel mark erasing device 10 and the direct sowing device 30. The fourth connecting portion R4 has a length extending over the entire length of the direct seeding device 30 in the left-right direction. The direct sowing device 30 is connected and fixed behind the fourth connecting portion R4. By the way, the mounting configuration of the third connecting portion R3 to the seventh frame F7 and the mounting configuration of mounting the fourth connecting portion R4 to the third connecting portion R3 include, for example, fastening of the connecting tool B via a plate or the like. , Or by welding or the like.

In this embodiment, as an example of the connection configuration for connecting and fixing the direct sowing device 30 to the rear side of the wheel mark erasing device 10, an example including the third connection portion R3 and the fourth connection portion R4 is shown. This is merely an example, and the direct sowing device 30 can be connected and fixed to the rear side of the wheel mark erasing device 10 by adopting a connecting configuration using a connecting member such as another plate or a frame.

The direct sowing device 30 is provided with a plurality of unit bodies 31 arranged in the left-right direction of the direct sowing device 30 as shown in FIG. As shown in FIGS. 1 and 2, each of the plurality of unit bodies 31 has a front end portion of a first connection frame 32 extending forward, which is connected and fixed to a fourth connection portion R4. Incidentally, as the configuration for connecting the first connection frame 32 to the fourth connection portion R4, a configuration for connecting by fastening the connector B with a plate or the like interposed or a configuration for connecting by welding or the like can be adopted. .

In this embodiment, as shown in FIG. 2, an example in which three unit bodies 31 are provided is shown. However, the number of the unit bodies 31 can be appropriately changed, and the number of the unit bodies 31 can be changed as necessary. The number can be changed. Since each of the plurality of unit bodies 31 has the same configuration, one unit body 31 will be described below.

As shown in FIGS. 6 and 7, the unit body 31 sequentially draws out the float 33, the rotating part 34, the hopper 35 for storing seeds, and the seeds stored in the hopper 35, and moves the seeds to a work site such as a field. A feed section 36 for direct sowing is provided.

The float 33 is for supporting the unit body 31 so that the unit body 31 does not sink as shown in FIG. The float 33 is provided at the lower end of the unit body 31 in a posture extending from the front side to the rear side. In the float 33, the front part 33a is formed in a semicircular shape (see FIG. 2) in plan view, and the middle part 33b and the rear part 33c in the front-rear direction are larger than the front part 33a in the left-right direction of the direct seeding device 30. It is formed in a narrow rectangular shape (see FIG. 2). An intermediate portion 33b of the float 33 is pivotally connected to the rear end of the first connection frame 32 by the first connection plate S1. Thereby, the unit body 31 is connected to the fourth connecting portion R4 (the rear side of the wheel mark erasing device 10) via the float 33.

In this embodiment, when connecting the unit body 31 to the fourth connecting portion R4, the first connecting frame 32 connected to the fourth connecting portion R4 and the float 33 are connected to each other, so that the fourth Although connected to the connecting portion R4 (the rear side of the wheel mark erasing device 10), for example, the front connecting frame connected to the feeding portion 36 and the like is connected to the fourth connecting portion R4 (the rear side of the wheel mark erasing device 10). Side), and the connection configuration for connecting the unit body 31 to the fourth connection portion R4 can be appropriately changed. By the way, when connecting the connecting frame extending forward connected to the extending portion 36 and the like to the fourth connecting portion R4, the intermediate portion 33b of the float 33 is pivotally connected to the frame connected to the extending portion 36 and the like. be able to.

6, the float 33 is not provided in the unit body 31 in a fixed state, but is provided so as to be vertically movable, as shown in FIG. A front portion 33a of the float 33 is vertically movably connected to a front end of a pipe-shaped second connection frame 37 extending in the front-rear direction via a second connection plate S2. The second connection plate S2 is provided in a posture extending upward from the third connection plate S3 provided on the front side portion 33a of the float 33, and has an elongated hole S2a extending in the vertical direction. The third connecting plate S3 is vertically movably connected to the fourth connecting plate S4 provided at the front end of the second connecting frame 37 by the connecting pins 38 inserted into the long holes S2a. An elastic body (spring) 39 for urging the float 33 upward is provided between the front end of the second connecting frame 37 and the front part 33a of the float 33, and the front part 33a of the float 33 is provided. Prevents inconvenience such as being buried in the work place.

6) On the outer side in the left-right direction with respect to the middle portion 33b of the float 33, as shown in FIGS. A fifth connection plate S5 is provided so as to extend between the front side portion 33a and the middle portion 33b of the float 33, and the groove making device 51 is disposed on the lower surface side (rear surface side) of the fifth connection plate S5.

The hopper 35 is disposed above the direct sowing device 30 as shown in FIGS. 6 and 7. A feeding portion 36 is connected and fixed below the hopper 35, and the hopper 35 and the feeding portion 36 are integrally provided. As shown in FIG. 7, the feeding portion 36 is formed in a bifurcated shape that branches into a left feeding portion 36a and a right feeding portion 36b in the left-right direction. The left feeding portion 36a and the right feeding portion 36b are connected and fixed by a third connection frame 40 extending in the left-right direction. In the third connecting frame 40, a second connecting frame 37 (see FIG. 6) is connected and fixed at the center in the left-right direction. As a result, an integral body of the hopper 35 and the feeding portion 36 is connected to the float 33 via the third connection frame 40 and the second connection frame 37.

6) As shown in FIGS. 6 and 7, the rotating portion 34 is formed of a frame-like body in which a circular outer frame portion 34a and a circular inner frame portion 34b are connected. The rotating portion 34 is rotatable around the axis of the first rotating shaft portion 41 by the first rotating shaft portion 41 provided on the laterally outward side of the feeding portion 36 (the left feeding portion 36a and the right feeding portion 36b). Provided. The right and left rotating portions 34 are provided in a pair on the left and right sides of the rotating portion 34 disposed outside the left extending portion 36a and the rotating portion 34 disposed outside the right extending portion 36b. Each of the pair of left and right rotating parts 34 is provided with a plurality of apertures 42 at predetermined intervals in the rotating direction of the rotating part 34. The opening 42 is configured to form a hole by scooping up the soil at the work site to the rear side by the rotation of the rotating unit 34. In the left-right direction, the rotating portion 34 arranged outside the left-side extending portion 36a and the rotating portion 34 arranged outside the right-side extending portion 36b have the opening 42 in the rotating direction. The positions (phases) are set to be different.

(4) The inside of the hopper 35 and the inside of the feeding section 36 are connected to each other so that the seeds stored in the hopper 35 can be supplied to the feeding section 36 by its own weight or the like. As shown in FIG. 9, the feeding section 36 is provided with a feeding roll 43 that is disposed on one side of the feeding section 36 in the left-right direction and feeds seeds supplied from the hopper 35 at a predetermined timing. A plurality of feeding holes 44 are formed in the feeding roll 43 at regular intervals in the circumferential direction. By rotating the payout roll 43 about the axis of the second rotating shaft 45, the seeds are sequentially inserted into the payout hole 44, and the seeds are discharged from the lower discharge unit 46, so that the seeds are directly sown on the work site. are doing.

The direct sowing device 30 does not include a rotation drive unit for rotating and driving the feeding roll 43, and is configured to rotate the feeding roll 43 by transmitting the rotational force of the rotating unit 34 to the feeding roll 43. I have. For this purpose, as shown in FIGS. 8 and 9, a rotational force transmitting mechanism 47 that transmits the rotational force of the rotating unit 34 to the feeding roll 43 is provided.

As shown in FIG. 8, the rotational force transmitting mechanism 47 is disposed on the other side of the payout unit 36 (the side opposite to the side where the payout roll 43 is provided) in the left-right direction, and is rotatable integrally with the rotating unit 34. A first gear 48, a second gear 49 meshing with the first gear 48, and a third gear 50 meshing with the second gear 49. The first gear 48 is provided so as to be rotatable integrally with the first rotating shaft portion 41 of the rotating portion 34. The second gear 49 is provided so as to be rotated by the rotation of the first gear 48. The third gear 50 is provided so as to be rotated by the rotation of the second gear 49. The third gear 50 is rotatably provided integrally with the second rotation shaft 45 of the pay-out roll 43 (see FIG. 9) provided on the opposite side of the pay-out unit 36 in the left-right direction. Is rotated, the feeding roll 43 is rotated. In this manner, the rotation force transmission mechanism 47 is configured to transmit the rotation force of the rotation unit 34 to the feeding roll 43 via the first to third gears 48 to 50 when the rotation unit 34 rotates. I have.

The operation of the wheel mark erasing device 10 will be described.
When the tractor 1 travels forward, the wheel mark erasing device 10 is moved to the reference position, which is the center of the portion through which the rear wheel 4 passes, in each of the plurality of body approaching bodies 12a to 12c as shown in FIG. Put the soil on the K side. At this time, although the degree of crushing of the soil is rough in the first set of soil-pulling bodies 12a located closest to the reference position K in the left-right direction, the crushed soil can be brought closer to the reference position K. The soil can be brought to the reference position K side while reducing the degree of crushing the soil by the second set of anti-soil bodies 12b located at the position closest to the reference position K in the left-right direction. Further, the third set of anti-soil bodies 12c located at the third position closest to the reference position K in the left-right direction allows the soil to be brought closer to the reference position K while the degree of crushing the soil is further reduced. In this manner, the soil can be brought to the reference position K side while gradually reducing the degree of crushing the soil by the plurality of soil contacting bodies 12a to 12c.

As shown in FIG. 10, among the plurality of body approaching bodies 12a to 12c, the one located closer to the reference position K, which is the center of the portion where the rear wheel 4 passes, has a longer length in the front-rear direction. It is set to be shorter. Thus, the crushed soil can be appropriately gathered at each of the plurality of soil contacting bodies 12a to 12c while being collected at the reference position K side. Therefore, for example, even when the soil of a work site such as a field is hard, the soil can be crushed toward the reference position K in a state where the soil is sufficiently crushed by the plurality of soil crushers 12a to 12c. In addition, since the soil is collected by the plurality of soil contacting bodies 12a to 12c, a sufficient amount of soil can be secured.

Since the wheel mark erasing apparatus 10 includes not only the plurality of soil approaching bodies 12a to 12c but also the leveling body 13, the wheel trace eraser 10 is moved toward the reference position K (see FIG. 10) by the plurality of soil approaching bodies 12a to 12c. The soil can be leveled by the leveling body 13, and the wheel marks can be properly erased. In addition, as shown in FIG. 5, the leveling body 13 includes the inclined portion 15, so that the approached soil is prevented from moving upward from the leveling body 13 and a sufficient amount of soil is leveled. It can be moved below the body 13. As a result, in the leveling body 13, the soil moved to the lower side of the leveling body 13 at the inclined portion 15 can be appropriately leveled at the horizontal portion 16, and wheel marks can be erased cleanly.

As shown in FIG. 5, the bottom of each of the plurality of soil approaching bodies 12a to 12c is provided with a front inclined portion 17 and a rear inclined portion 18 to allow a certain amount of soil movement in the left-right direction while maintaining the standard. The soil can be brought closer to the position K (see FIG. 10). Thus, for example, the soil can be moved to the reference position K without hindering the soil brought to the other mulching body 12 from moving to the reference position K, and the trace of the mulching body 12 itself can be performed. Can be suppressed.

The operation of the direct sowing device 30 will be described.
In the direct sowing apparatus 30, as shown in FIG. 7, the groove generator 51, the opening 42 of the rotating part 34, and the discharge part 46 (see FIG. 9) of the feeding part 36 are arranged at the same or substantially the same position in the horizontal direction. Have been. As a result, when the tractor 1 moves forward, the grooves formed by the groove generator 51, the holes formed by the open holes 42, and the seeds discharged from the discharge unit 46 are the same or substantially in the left-right direction. They are in the same position.

In the direct sowing device 30, as shown in FIG. 6, the position acting on the work site is, from the front side, the groove generator 51, the opening portion 42 of the rotating portion 34, and the discharge portion 46 of the feeding portion 36 (see FIG. 9). ). Therefore, a groove is formed in the work place by the groove making device 51, a hole is formed in the opening portion 42 at a position where the groove is formed, and the seed is directly sown from the discharge portion 46 by the feeding roll 43. As shown in FIG. 11, the opening 42 forms a hole U in the work place T by scooping the soil in the work place T to the rear side, and deposits the scooped soil in the back side of the hole U. Thus, the embankment V is formed. The seed W is discharged from the discharge unit 46 at a predetermined timing by the feeding roll 43, and the seed W is directly sown between the embankment V and the embankment V. Here, with respect to the position where the seed W is directly sowed, the seed W can be sowed directly into the hole U or the seed W can be sowed directly behind the hole U by adjusting the rotation timing of the feeding roll 43 and the like.

[Second embodiment]
The second embodiment is another embodiment of the wheel mark erasing device 10 according to the first embodiment. Hereinafter, the wheel mark erasing device 10 according to the second embodiment will be described with reference to FIG.

As in the first embodiment, the wheel mark erasing device 10 includes a device body 61 that can be freely connected to the rear side of the tractor 1, and the device body 61 includes a plurality of burrowers 12 and a terrain body 62. ing. The soil burying body 12 is the same as that of the first embodiment, and the description thereof will be omitted by retaining the same reference numerals. Incidentally, since the mulching body 12 is arranged on the lower surface side (back surface side) of the ground adjustment body 62, the mulling body 12 is shown by a dotted line in FIG.

The terrain 62 is configured to be shorter in the front-rear direction than the terrain 13 in the first embodiment. As in the first embodiment, the leveling body 62 has a front portion that is an inclined portion 63 and a rear portion that is a horizontal portion 64 in the front-rear direction. At the front end of the inclined portion 63, a notch 65 cut out from the front to the rear is formed, and the notch 65 is provided on both the left and right sides.

The apparatus body 61 is mainly composed of a terrain body 62, and a plurality of frames (ninth to twelfth frames) F9 to F12 and a plurality of frames for connecting the terrain body 62 to the front tractor 1 side and the rear side direct sowing apparatus 30. (Fifth to seventh connection parts) R5 to R7.

The ninth frame F9 is formed in the shape of a square pipe, and is provided at the center of the terrain body 62 in the left-right direction in a posture extending upward from the center of the terrain body 62 in the front-rear direction. The tenth frame F10 is formed in a plate shape, is disposed on both left and right sides of the center of the ground preparation 62 in the left-right direction, and has a pair of left and right sides. Each of the pair of left and right tenth frames F10 is provided so as to extend upward in the front-rear direction over the entire length of the horizontal portion 64 of the terrain body 62. Each of the pair of left and right tenth frames F10 is formed in an inclined shape that is located on the upper side toward the rear side, and the rear end portion F10a is bent inward in the left and right direction. The eleventh frame F11 is formed in a square pipe shape, and both ends in the left-right direction are connected to upper ends of a pair of left and right tenth frames F10. The eleventh frame F11 is disposed below the upper end of the ninth frame F9 in the up-down direction, and is provided so as to extend symmetrically in the left-right direction about the ninth frame F9. The twelfth frame F12 is formed in an elongated pipe shape, and includes a pair of left and right frames. Each of the pair of left and right twelfth frames F12 is provided with an inclined posture that is positioned lower toward the rear in a state where the upper end of the ninth frame F9 is connected to the left and right ends of the eleventh frame F11. .

には A pair of left and right fifth connecting portions R5 for connecting the lower link 5 on the tractor 1 side are provided at the front end of the horizontal portion 64 in the terrain body 62. The fifth connecting portion R5 is provided at the same position as the cutout portion 65 formed in the inclined portion 63 in the left-right direction. As a result, each of the pair of left and right lower links 5 is provided movably upward and downward with respect to the terrain body 62 through the notch 65 without interfering with the terrain body 62.

上端 A sixth connecting portion R6 for connecting the upper link 6 on the tractor 1 side is provided at an upper end portion of the ninth frame F9. In this manner, the wheel mark erasing device 10 is configured such that the connection points of the upper link 6 on the tractor 1 side and the pair of left and right lower links 5 with the three-point link mechanism are in the front-rear direction of the terrain body 62 (device main body 61). It is an intermediate portion, and is configured to be freely connectable to the rear side of the tractor 1 in a state where the terrain body 62 (the apparatus main body 61) is closer to the tractor 1 in the front-rear direction.

板 A plate-like seventh connecting portion R7 extending rearward is provided on both left and right sides of the eleventh frame F11. The seventh connecting portion R7 is connected to the upper end of the eleventh frame F11, and is provided in a posture protruding rearward from the eleventh frame F11. For example, the pair of left and right seventh connecting portions R7 can connect and support the fourth connecting portion R4 in the posture extending in the left-right direction. Thereby, similarly to the first embodiment, the direct sowing device 30 is configured to be freely connectable to the rear side of the wheel mark erasing device 10 by using the seventh connecting portion R7 and the fourth connecting portion R4 (FIG. 1 and FIG. (See FIG. 2).

As described above, when the tractor 1 and the wheel mark erasing device 10 are connected, the inclination angle of the terrain body 62 (the device main body 61) in the front-rear direction can be adjusted by adjusting the length of the upper link 6. Have been. For example, when the length of the upper link 6 is shortened, the rear end of the terrain body 62 (the apparatus main body 61) can be positioned more upward. It can be a rear upper inclined position located on the upper side. In the upper rearward inclined posture, as the length of the upper link 6 is reduced, the inclination angle of the upper rearward inclined posture with respect to the horizontal direction can be increased. In addition, by increasing the length of the upper link 6, the terrain control body 62 (the apparatus main body 61) can be set to the lower rearward inclined posture, and the inclination angle of the lower rearward inclined posture can be adjusted.

By adjusting the upper link 6 such as the length, angle, and elevation position of the upper link 6, the position of the direct sowing device 30 with respect to the wheel mark erasing device 10 in the vertical direction can be adjusted. For example, by adjusting the length of the upper link 6, in the vertical direction, the direct sowing device 30 can be disposed at a position protruding downward from the wheel mark erasing device 10, and the amount of protrusion at that time is adjusted. can do. In addition, by adjusting the length of the upper link 6, conversely, the direct sowing device 30 can be arranged at a position where the direct sowing device 30 is retracted upward from the wheel mark erasing device 10, and the retraction amount at that time is adjusted. be able to.

In a head-up state in which the front side of the tractor 1 is located above the rear side, the tractor 1, the wheel mark erasing device 10, and the direct seeding device 30 are arranged in this order from the front side. The direct sowing device 30 located on the rear side attempts to move deeper (lower side) with respect to the work place. As shown in FIGS. 1, 2, and 6, the direct sowing device 30 is provided with a float 33 and the like, and is restricted from moving deeper (downward) with respect to the work site. Therefore, in the head-up state of the tractor 1, the wheel mark erasing device 10 exists at a position moved upward with respect to the work place, and it is difficult to appropriately erase the wheel mark with the wheel mark erasing device 10. It can be considered. Thus, as described above, by adjusting the length and the like of the upper link 6, the direct seeding device 30 is disposed at a position retreated upward from the wheel mark erasing device 10, and the retraction amount at that time is adjusted. Thereby, it is possible to prevent the rear wheel eraser 10 from being present at a position moved upward with respect to the work place, and the wheel trace eraser 10 can appropriately erase the wheel trace.

[Another embodiment]
Another embodiment of the present invention will be described. The configuration of each embodiment described below is not limited to being applied independently, and can be applied in combination with the configuration of another embodiment.

(1) In the above embodiment, not only the wheel mark erasing device 10 but also the direct sowing device 30 is connected to the rear side of the tractor 1. However, only the wheel mark erasing device 10 is used in combination. Can also.

(2) In the above-described embodiment, the example in which the wheel mark erasing device 10 includes the

ground adjustment bodies

13 and 62 in addition to the plurality of soil contact members 12a to 12c, but the wheel mark erasing device includes a plurality of pairs. It is also possible to provide only the mulch.

(3) In the above-described embodiment, in the wheel mark erasing device 10, the length in the vertical direction of each of the plurality of soil contact members 12a to 12c is set to be the same or substantially the same. It is also possible to set the length in the vertical direction to be different between 12c and 12c. For example, the length in the up-down direction can be set so that the closer to the reference position, which is the center of the portion through which the wheels pass, among the plurality of anti-shoulder bodies, the shorter the length in the vertical direction.

The present invention can be applied to various wheel mark erasing devices for erasing wheel marks of a work vehicle, and to various work vehicles provided with the various wheel mark erasing devices.

1 tractor (work vehicle)
4 Rear wheel (wheel)
REFERENCE SIGNS LIST 10 wheel mark erasing device 11 device main body 12 mulling body 12a first set of mulling body 12b second set of mulling body 12c third set of mulling body 13 leveling body 15 inclined part 16 horizontal part 17 forward inclined part 18 Rear inclined part 19 Connection fixing part 30 Direct sowing device 62 Ground preparation body 63 Tilt part 64 Horizontal part

Claims

A device body that can be connected to the rear side of the work vehicle is provided,
The main body of the device is provided with a pair of left and right sloping bodies that are closer to each other in the left and right direction of the work vehicle toward the rear side portion,
With the pair of left and right mulching bodies as one mulling body, a plurality of left mulching bodies are arranged at intervals in the left-right direction of the work vehicle, and the right mulling body is arranged at intervals in the left-right direction of the working vehicle. In the state of being arranged side by side, a plurality of anti-shoulder bodies are provided,
A wheel mark erasing device, wherein the plurality of body approaching bodies have different lengths in the front-rear direction of the work vehicle.
The device body is provided with a leveling body for leveling the soil collected by the soil collecting body,
The terrain body is provided with an inclined portion inclined toward the rear side in such a manner that the rear portion is located on the lower side, and a horizontal portion extending rearward along the horizontal direction following the inclined portion. The wheel mark erasing device according to claim 1.
Each of the plurality of anti-shoulder bodies is arranged in a state extending in the front-rear direction of the work vehicle, between the inclined part and the horizontal part of the terrain body,
At the bottom of each of the plurality of anti-shoulder bodies, a front-side inclined portion that is inclined toward the rear side and extends rearward and is inclined toward the rear side, and a rear-side portion is inclined while positioned closer to the upper side. The wheel mark erasing device according to claim 1 or 2, further comprising a rear inclined portion extending rearward.
Each of the plurality of body approaching bodies is provided swingably in the left and right direction of the work vehicle with a front end portion as a fulcrum,
The wheel mark erasing device according to any one of claims 1 to 3, further comprising a connection fixing portion that is connected across the plurality of soil approaching bodies and fixed to the device main body.
A work vehicle provided with the wheel mark erasing device according to any one of claims 1 to 4,
On the rear side of the work vehicle, from the front side, the wheel mark erasing device and the direct sowing device are provided so as to be freely connected in a state where the wheel mark erasing device and the direct sowing device for directly sowing seeds in the work place are arranged in this order. Working vehicle.