JP6579770B2 - Paddy field machine - Google Patents

Description

  The present invention relates to paddy fields such as a riding type rice transplanter and a riding type direct seeding machine for supplying different types of agricultural powder to the rice field, such as fertilizers, drugs and seeds, different types of drugs, different types of fertilizers, etc. It relates to work equipment.

Some paddy field machines are configured to supply two different types of powder particles to the rice field, such as medicine and fertilizer, seed and fertilizer, and seed and medicine.
For example, Patent Document 1 includes a first groove forming portion (FIGS. 8 and 17 in FIG. 10 of Patent Document 1) that forms a groove on the surface as the machine progresses, and a covering member (FIGS. 8 and 8 of Patent Document 1). 10 88) is provided on the lateral side of the first groove portion.
Thereby, the 1st granule (fertilizer in patent document 1) paid out by the 1st delivery part (15 of Drawings 1, 3, and 5 of patent documents 1) is the 1st supply pipe (FIG. 1 of patent documents 1). , 4, 10 from 18, 19), the first groove forming portion supplies the groove formed on the surface.

In patent document 1, it is provided with the 2nd groove part (12 of FIG. 8 and FIG. 10 of patent document 1) which forms a groove | channel on a rice field with advancing of a body, and the 2nd groove part is an extension end of a covering member. (Refer to FIG. 8 and FIG. 10 of Patent Document 1).
As a result, the second powder (seeds in Patent Document 1) fed out by the second feeding unit (7 in FIGS. 4 and 6 of Patent Document 1) is transferred to the second supply pipe (FIG. 1, FIG. 1 of Patent Document 1). No. 4, 10 13) is supplied to the groove formed on the surface by the second groove section.

JP 2011-30441 A

In the case where the first and second groove forming portions and the soil covering member are provided, in Patent Document 1, the soil covering member is provided on the lateral side of the first groove forming portion so that the first groove forming portion and the soil covering member overlap in a side view. .
Thereby, when setting the position of the soil covering member, while avoiding the contact between the first groove forming portion and the soil covering member, in the side view, the first groove forming portion and the soil covering member overlap each other so as to overlap. In order to provide the soil covering member, it is necessary to slightly separate the soil covering member and the first groove forming portion in the left-right direction.
Therefore, the whole of the first and second groove forming portions and the soil covering member has a large width, and there is room for improvement.

  In the paddy field machine, when the first and second groove forming portions and the soil covering member are provided, the first and second groove forming portions and the soil covering are suppressed while suppressing the overall width of the first and second groove forming portions and the soil covering member. It aims at comprising so that a member can be arranged.

The feature of the present invention is that
A first reservoir for storing the first granular material is a drug, the feeding and the second storage unit for storing the second granular material is a fertilizer, the first granular material from the first reservoir 1 comprising a feeding portion, a second feeding section for feeding the second granules from said second reservoir,
Comprising a float and a first installment groove portion and the second installment groove portion for forming a groove in the paddy with the progress of the aircraft, a first cover soil member Ru fill the groove formed by said first Sakumizo portion extending in the front fuselage And
The first soil covering member has a bracket, and a front end portion of the bracket is located between the first groove forming portion and the second groove forming portion in the float width direction, and a rear end of the first soil covering member. The portion extends rearward so as to be located outside the first groove portion in the float width direction, In a side view, part of the bracket is overlapped with a portion of the first film groove, and, a part of the first soil cover member overlaps with a part of the second installment groove portion,
A second soil covering member that fills a groove formed by the second grooving part to which the second granular material is supplied as the airframe progresses,
The second soil covering member is provided at a position on the lateral side of the second groove forming portion in a position where a part of the second soil covering member overlaps with a part of the second groove forming portion in a side view. is there.

According to this characteristic configuration, the first groove forming portion and the first soil covering member can be brought close to each other in the left-right direction, and the overall lateral width of the first groove forming portion and the first soil covering member can be suppressed.
In this case, even if the first groove forming portion and the first soil covering member are brought close to each other in the left-right direction, the first soil covering member is set to an appropriate posture without difficulty without bringing the first soil covering member into contact with the first groove forming portion. can do.

Moreover, the 1st groove part and the 2nd groove part can be made to approach in the left-right direction, and the horizontal width of the whole 1st and 2nd groove part can be suppressed. By providing the second groove portion in a position overlapping the first soil covering member in a side view, the first and second groove portions are not separated in the front-rear direction, and the first and second groove portions, The overall length in the front-rear direction can be suppressed.

Furthermore, when the 1st granular material splashes to the side when it comes out from the exit of the 1st supply pipe, possibility that a 1st granular material will adhere to the 1st soil covering member of a lateral side can be decreased. Therefore, the possibility that the lump of the first granular material grows in the first soil covering member can be reduced.

  That is, while suppressing the adhesion of the first granular material to the first soil covering member and the growth of the first granular material mass on the first soil covering member, the overall width of the first groove forming portion and the first soil covering member is suppressed. Can be reduced, the overall width of the first and second grooved portions can be reduced, and the overall length of the first and second grooved portions and the first soil covering member can be reduced. By the point, the 1st and 2nd groove forming part and the whole 1st soil covering member can be put together compactly, and can be arranged.

  When the second soil covering member is provided with respect to the second groove forming portion, since the second groove forming portion and the second soil covering member approach in the front-rear direction, the length of the entire second groove forming portion and the second soil covering member in the front-rear direction. The length of the first and second groove forming portions and the first and second soil covering members in the front-rear direction can be suppressed, and the first and second groove forming portions, the first and second soil covering portions can be suppressed. The entire member can be arranged in a compact manner.

The first soil covering member can be easily extended to the groove by the first groove portion and the obliquely rearward toward the rear without bringing the first soil covering member into contact with the first groove portion, and the first and second groove portions, the first soil covering. Since the entire width of the member can be suppressed, the first and second groove forming portions and the entire first soil covering member (second soil covering member) can be arranged in a compact manner.

  The base of the second soil covering member can be arranged without difficulty while avoiding interference with the first soil covering member, and the second soil covering member in the left-right direction while avoiding mutual interference between the first and second soil covering members. Since the first soil covering member can be approached, the first and second groove forming portions and the entire first and second soil covering members can be arranged in a compact manner.

In one of the preferred embodiments according to the present invention, the first groove forming portion includes a first groove forming body that forms a groove on the surface, and a first groove forming device that is connected to the first groove forming body. The first groover includes a first front wall portion connected to a rear surface of the first groove forming body, and a first right wall extending rearward from a right edge portion of the first front wall portion. And a first left wall portion extending rearward from a left edge of the first front wall portion, and a lower end of the first right wall portion and the first left wall portion on the vehicle body rear side. The outlet of the first granular material located at the lower part of the first supply pipe connected to the first groove portion is located above the bottom surface of the float, and the first right wall portion and the first It is preferable that it is located between the left wall portions.

As disclosed in Patent Document 1, a groove forming body that forms a groove by entering a groove surface, a right wall portion that extends rearward from the right portion of the rear portion of the groove forming body, and groove formation And a left wall portion extending rearward from the left rear portion of the body. In such a groove forming portion, when the supply pipe is connected to the groove forming portion, the outlet of the supply pipe is often located between the right and left wall portions of the groove forming portion.
In the above-described state, for example, when supplying fine particles like a drug from the outlet of the supply pipe to the groove by the groove, the right and left wall portions of the groove when the powder comes out of the outlet of the supply pipe When contact is made, the water particles on the surface may cause the powder particles to adhere to the inner surfaces of the right and left wall portions of the groove, and the particles may grow and become clogged.

According to said structure, since the lower end part of the 1st right wall part and 1st left wall part of a 1st groove part is located above the bottom face of a float, the 1st right wall part of a 1st groove part And the lower end part of a 1st left wall part can be located above a rice field.
Thereby, when the 1st granular material comes out from the exit of the 1st supply pipe, it is less likely to contact the 1st right wall part and the 1st left wall part of the 1st groove part, and the water of a rice field is the 1st. Since it becomes difficult to reach the inner surfaces of the first right wall portion and the first left wall portion of the first groove portion, the first granular material adheres to the inner surfaces of the first right wall portion and the first left wall portion of the first groove portion. Therefore, the possibility that the lump of the first granular material grows and develops to clogging can be reduced.

Moreover, when the 1st granular material comes out from the exit of the 1st supply pipe, it passes along the 1st right wall part of the 1st groove part, and the lower side of the 1st left wall part. Since the first soil covering member is located on the rear side of the first groove forming portion (the outlet of the first supply pipe), the first granular material can adhere to the first soil covering member. Therefore, the possibility that the lump of the first granular material grows in the first soil covering member can be reduced.

In one preferred embodiment of the present invention, the first powder and the second granular material fed by the first feeding portion and the second feeding portion are the first groove portion and the second groove portion. The second groove forming portion is configured to be supplied from the first supply pipe and the second supply pipe connected to the two groove forming portions to the groove formed on the surface by the first groove forming portion and the second groove forming portion. A second groove forming body that forms a groove on the surface, a second right wall portion that extends rearward from the right portion of the rear portion of the second groove forming body, and a left portion of the rear portion of the second groove forming body. parts and a second left wall portion which extends rearward from the lower end portion of the second right wall portion and the second left wall portion is located below the bottom surface of the float, the second outlet of the second granular material located under the second supply pipe is positioned between the second right wall portion and the second left wall portion Door is preferred.

As disclosed in Patent Document 1, a groove forming body that forms a groove by entering a groove surface, a right wall portion that extends rearward from the right portion of the rear portion of the groove forming body, and groove formation And a left wall portion extending rearward from the left rear portion of the body. In such a groove forming portion, when the supply pipe is connected to the groove forming portion, the outlet of the supply pipe is often located between the right and left wall portions of the groove forming portion.
In the above-described state, for example, when supplying relatively large granular material such as fertilizer from the outlet of the supply pipe to the groove by the groove forming portion, it is desired to supply the granular material to the groove by the groove forming portion without scattering as much as possible. There is a request.

According to said structure, since the lower end part of the 2nd right wall part and 2nd left wall part of a 2nd groove part is located below the bottom face of a float, the 2nd right wall of a 2nd groove part The lower end part of a part and a 2nd left wall part can be located below a rice field.
Thereby, even if it is going to scatter when the 2nd granular material comes out from the exit of the 2nd supply pipe, the 2nd granular material is scattered by the 2nd right wall part and the 2nd left wall part of the 2nd groove part. It is suppressed and the 2nd granular material is supplied to the slot by the 2nd groove forming part.

  The second groove forming portion is provided at a position overlapping the first soil covering member in a side view, and the first soil covering member is located on the lateral side of the second groove forming portion. Even if the second granular material tries to scatter laterally when it comes out from the outlet of the second supply pipe, the second granular material is scattered by the second right wall portion and the second left wall portion of the second groove portion. It is possible to reduce the possibility that the second granular material will adhere to the lateral first covering member, and to reduce the possibility of the growth of the second granular material in the first covering member. be able to.

In one preferred embodiment according to the present invention, the first and 1 installment a groove connected to the float, the portion of the float position of the first installment lateral side and said first film behind the groove of the groove In addition, it is preferable that a vertical wall portion facing upward and downward along the front-rear direction is connected, and the first soil covering member is connected to the vertical wall portion.

  According to said structure, when the 1st granular material splashes to the side when it comes out from the exit of the 1st supply pipe, the 1st granular material which is going to flow into a float can be stopped by a vertical wall part. It is possible to reduce the possibility that the first granular material coming out from the outlet of the first supply pipe adheres to the float, and to reduce the possibility that the lump of the first granular material grows in the float. be able to.

In one preferred embodiment according to the present invention, it is preferable that the position of the first soil covering member can be changed up and down.

  According to the above configuration, by changing the position of the first soil covering member (the depth of entry into the surface) up and down according to the state of the surface (the mud of the surface and the amount of water on the surface). The groove by the 1st groove part to which the 1st granular material was supplied can be filled up appropriately.

In one preferred embodiment of the present invention, it is preferable that the inclination posture of the first soil covering member with respect to the front-rear direction can be changed along the bottom surface of the float.

According to the above configuration, in addition to being able to change the position of the first soil covering member (the depth of entry into the field) up and down, the inclination posture of the first soil covering member with respect to the front-rear direction can also be changed. .
As a result, the posture of the first soil covering member (the depth of entry into the surface and the inclined posture) can be finely set according to the state of the surface (the mud hardness of the surface and the amount of water on the surface). The groove by the 1st groove part to which the 1st granular material was supplied can be filled up appropriately.

It is a whole side view of a riding type direct seeding machine. It is a side view of a seeding device, a fertilizer application device, and a medicine supply device. It is a rear view of a seeding device, a fertilizer application device, and a medicine supply device. It is a rear view of a chemical | medical agent supply apparatus. It is a top view of the vicinity of a float. It is a perspective view which shows the frame structure of a sowing apparatus, a fertilizer application apparatus, and a chemical | medical agent supply apparatus. It is a top view of the center float. It is the vertical side view seen from the VIII-VIII direction in FIG. It is the vertical side view seen from the IX-IX direction in FIG. It is a disassembled perspective view which shows the grooving device in the 1st grooving part, a soil covering member, a supply pipe, a supporting member, etc. It is a top view of the vicinity of the center float in the 1st another form of implementation of an invention, a groove producing device, and a soil covering member. It is a top view of the vicinity of the center float in the 2nd another form of implementation of an invention, a groove producing device, and a soil covering member. It is a top view of the vicinity of the center float in the 3rd another form of implementation of an invention, a groove producing device, and a soil covering member. It is a top view of the vicinity of the center float in the 4th another form of implementation of an invention, a groove producing device, and a soil covering member. It is a top view of the vicinity of the center float in the 5th another form of implementation of an invention, a groove producing device, and a soil covering member. It is a top view of the vicinity of the float of the center in the 6th another form of implementation of an invention, a groove producing device, and a soil covering member. It is a top view of the vicinity of the center float in the 7th another form of implementation of an invention, a groove producing device, and a soil covering member.

  The front-rear direction and the left-right direction in the embodiment of the present invention are described as follows unless otherwise specified. The forward traveling direction during the work travel of the airframe is “front”, and the backward traveling direction is “rear”. The direction corresponding to the right side is “right” and the direction corresponding to the left side is “left” based on the forward posture in the front-rear direction.

[1]
As shown in FIG. 1, a link mechanism 3 is supported at the rear of the machine body supported by the front wheel 1 and the rear wheel 2 so as to be movable up and down, and a hydraulic cylinder 4 for driving the link mechanism 3 up and down is provided. 3, a seeding device 5, a fertilizer application device 6 and a medicine supply device 7 are supported to constitute a 6-row type riding type direct sowing machine which is an example of a paddy field work machine.

[2]
Next, the frame structure that supports the seeding device 5, the fertilizer application device 6, and the medicine supply device 7 will be described.
As shown in FIGS. 2 and 6, a horizontal frame 8 in the left-right direction is provided, and a box-shaped frame portion 17 made of a plate material is connected to a central portion of the horizontal frame 8, and a boss portion is connected to the frame portion 17. 9 are connected. A front and rear horizontal frame 10 is connected to the right and left portions of the horizontal frame 8 in a rearward direction, and a vertical frame 11 is connected to the frame portion 17 and the horizontal frame 10. Directional lateral frames 12 are connected.

  As shown in FIGS. 2 and 6, a front and rear horizontal frame 13 is connected to the center, right and left of the horizontal frame 8 in a rearward direction, and a vertical frame 14 is connected to the horizontal frame 13 in a vertical direction. . A bracket 18 is connected to the horizontal frame 10, and a horizontal frame 15 in the left-right direction is connected across the vertical frame 14 and the upper portion of the bracket 18.

  As shown in FIGS. 2, 5, and 6, the right and left horizontal frames 13 are extended forward, and brackets 13 b are connected to the front portions of the right and left horizontal frames 13. A plate-like wall member 19 is connected to the 13 brackets 13b. A wall member 19 is located on the rear side of the rear wheel 2, and mud blown rearward from the rear wheel 2 is prevented so that mud blown rearward from the rear wheel 2 does not rest on the right and left floats 16. It is stopped by the wall member 19.

  As shown in FIGS. 2, 5, and 6, in the horizontal frame 8, a front and rear horizontal frame 20 is connected forwardly to a portion between the horizontal frames 13, and a rake leveling member 21 is disposed in front of the horizontal frame 20. It is connected to the part. Thereby, the leveling member 21 is located between the floats 16 (see [6] described later), and the leveling members 21 level the portion between the floats 16 on the surface.

  As shown in FIGS. 2 and 6, the upper portion of the frame portion 17 is supported on the lower portion of the rear portion of the link mechanism 3 so as to be rotatable around the front and rear axis P1, and the entire horizontal frame 8 and the like are entirely supported by the front and rear axis P1. It is supported so that it can roll freely. A bracket 12a is forwardly connected to the right and left portions of the horizontal frame 12, and a spring 22 is connected across the upper portion of the rear portion of the link mechanism 3 and the bracket 12a of the horizontal frame 12. Etc. are urged in a posture parallel to the aircraft.

[3]
Next, the support structure of the seeding device 5 will be described.
As shown in FIGS. 2 and 3, in the seeding device 5, six feeding parts 23 are connected to the horizontal frame 15 at a predetermined interval, and a guide member 24 is connected to the lower part of the feeding part 23. The guide member 24 has a U-shaped cross section with the rear side open. Two hoppers 25 for storing iron-coated seeds are provided, and the hoppers 25 are connected over the upper part of the three feeding parts 23.

As a result, as shown in FIGS. 2 and 3, the seed of the hopper 25 is fed out by a predetermined amount by the feeding portion 23, and the seed falls through the inside of the guide member 24 without contacting the inner surface of the guide member 24. , Supplied to the surface (surface).
As described above, the seeding device 5 includes the feeding unit 23, the guide member 24, the hopper 25, and the like, and supplies a plurality of seeds in a lump form to the rice field (surface) immediately below the feeding unit 23. It is configured as a surface seeding type (spot seeding type) to be (spotted).

[4]
Next, the support structure of the fertilizer applicator 6 will be described.
As shown in FIG.2 and FIG.3, in the fertilizer applicator 6, six feeding parts 26 (equivalent to a 2nd feeding part) are connected with the horizontal frame 12 at predetermined intervals, and fertilizer (2nd grain for agriculture) Two hoppers 27 (corresponding to the second storage part) are provided, and the hoppers 27 are connected to the upper part of the three feeding parts 26.

  As shown in FIGS. 2, 3, and 5, a groove plate 28 (corresponding to a second groove forming body) and a soil covering member 31 (corresponding to a second soil covering member) are connected to the float 16, so The groove 29 is connected, and the hose 30 is connected across the feeding portion 26 and the groove generator 29.

  As a result, as shown in FIGS. 2, 3, and 5, the fertilizer of the hopper 27 is fed by the feeding portion 26, supplied from the hose 30 to the grooving device 29, and on the surface by the grooving plate 28 and the grooving device 29. Fertilizer is supplied to the formed groove, and mud is pushed out toward the groove by the side groove plate 28 and the grooving device 29 by the covering soil member 31 as the airframe advances, and the fertilizer is supplied. A ditch is filled.

  As described above, the fertilizer application device 6 includes the feeding portion 26, the hopper 27, the grooving plate 28, the grooving device 29, the hose 30, the soil covering member 31, and the like, next to the position where the seed is supplied. The fertilizer is configured to be supplied to a position below the rice field at a position in front of the position (a state where the fertilizer is located at a position below the rice field next to the seed).

[5]
Next, the support structure of the medicine supply device 7 will be described.
As shown in FIGS. 2 and 4, in the medicine supply device 7, six feeding parts 32 (corresponding to the first feeding part) are connected to the horizontal frame 12 at a predetermined interval, and the medicine (first agricultural powder) Three hoppers 33 (corresponding to first storage parts) are provided, and the hoppers 33 are connected to the upper portions of the two feeding parts 32. As shown in FIGS. 2, 4, and 5, a groove plate 34 (corresponding to a first groove forming body) and a soil covering member 37 (corresponding to a first soil covering member) are connected to the float 16. A groove 35 is connected, and a hose 36 is connected across the feeding portion 32 and the groove generator 35.

  As a result, as shown in FIGS. 2, 4, and 5, the medicine in the hopper 33 is fed out by the feeding portion 32, supplied from the hose 36 to the groove forming device 35, and then on the surface by the groove cutting plate 34 and the groove forming device 35. The medicine is supplied to the formed groove, and mud is pushed out toward the groove by the side groove plate 34 and the grooving device 35 by the covering soil member 37 as the machine progresses, and the medicine is supplied. A ditch is filled.

  As described above, the medicine supply device 7 includes the feeding portion 32, the hopper 33, the grooving plate 34, the grooving device 35, the hose 36, the soil covering member 37, and the like, and the front side of the position where the seed is supplied. In this position, the medicine is supplied to the position below the rice field (a state in which the medicine is located directly under the seed).

As shown in FIGS. 1 and 2, the input shaft 40 is supported by the boss portion 9, and the transmission shaft 39 is connected to the input shaft 40, and the power of the engine (not shown) of the fuselage is transmitted to the transmission shaft 39. Is transmitted to the input shaft 40.
The power of the input shaft 40 is branched into two transmission systems, the power is transmitted from one transmission system to the feeding unit 23 of the seeding device 5, and then the power is transmitted to the feeding unit 32 of the medicine supply device 7. The power is transmitted from the other transmission system to the feeding portion 26 of the fertilizer application device 6.

[6]
Next, the float 16 will be described.
As shown in FIGS. 2, 5, and 7, the float 16 includes a wide front portion 16a and a narrow rear portion 16b. The rear portion 16b extends rearward from the left and right center of the rear end of the front portion 16a. It is configured.

  As shown in FIGS. 2, 5, 6, and 7, the bracket 13 a is connected to the rear portion of the horizontal frame 13, the bracket 43 is connected to the rear portion 16 b of the float 16, and the brackets 43 of the three floats 16 are The bracket 13a of the horizontal frame 13 is supported so as to be swingable up and down around the horizontal axis P2. 2, 3 and 5, the right and left floats 16 are located on the rear side of the right and left rear wheels 2, and the center float 16 is located between the right and left rear wheels 2. A grooving device 38 for forming drainage grooves on the paddy surface is attached to the bottom surfaces of the rear portions of the right and left floats 16.

  In this riding type direct seeding machine, a height sensor (not shown) that detects the height of the horizontal frame 8 from the surface by detecting the vertical position of the center float 16 with respect to the horizontal frame 8, hydraulic oil is supplied to the hydraulic cylinder 4. And a control device (not shown) for operating the control valve based on the detection value of the height sensor.

  Thereby, when the horizontal frame 8 (seeding device 5, fertilizer application device 6, and medicine supply device 7) moves upward and downward with respect to the central float 16 that follows the ground contact with the rice field, based on the detection value of the height sensor. The control valve is operated by the control device, and the hydraulic cylinder 4 is operated so that the horizontal frame 8 (seeding device 5, fertilizer application device 6 and medicine supply device 7) is maintained at the set height from the rice field.

  As described above, since the central float 16 functions as a height sensor that detects the height of the horizontal frame 8 from the surface, the vertical swing range of the central float 16 is set to be relatively large. The posture that is slightly lowered forward with respect to the horizontal plane is the reference posture of the center float 16 (the position at which the detected value of the height sensor corresponds to the set height and the hydraulic cylinder 4 stops).

The right and left floats 16 with respect to the center float 16 do not have the function of the height sensor, and mainly level the field, and the horizontal frame 8 (seeding device 5, fertilizer application device 6 and medicine supply device 7). It stabilizes the posture.
Accordingly, the vertical swing range of the right and left floats 16 is set to be smaller than the vertical swing range of the central float 16, and the posture parallel to the horizontal plane is the reference posture (the right and left floats 16. The center position of the up and down swing range).

[7]
Next, the grooving plate 34 and the grooving device 35 will be described.
As shown in FIGS. 7, 8, and 10, the grooving plate 34 is formed in a triangular plate shape in a side view, and forms a groove on the surface as the airframe advances. It is connected to the float 16 by a bolt 44 so as to be located at the bottom of the rear end of the right and left of 16a.

  As shown in FIGS. 7, 8, and 10, the grooving device 35 is configured by bending a plate material into a U-shaped cross section, and includes a front wall portion 35 a, a right wall portion 35 b (corresponding to a first right wall portion), and A left wall 35c (corresponding to a first left wall) is provided. The lower end portion 35d of the right and left wall portions 35b, 35c of the groove forming device 35 is located on the upper side with respect to the front wall portion 35a of the groove forming device 35, and the front wall portion 35a of the groove forming device 35 is the bolt 45. Thus, it is connected to the rear portion of the grooved plate 34.

  As shown in FIGS. 7, 8, and 10, the width of the front wall 35 a of the groover 35 is substantially the same as the width of the grooved plate 34, and the groover is formed from the upper right part of the rear part of the grooved plate 34. The right wall 35b of the 35 is extended rearward, and the left wall 35c of the groove producing device 35 is extended rearward from the upper left part of the rear part of the grooved plate 34.

As shown in FIGS. 8 and 10, in the state in which the groove producing device 35 is connected to the groove cutting plate 34, the lower end portions 35 d of the right and left wall portions 35 b and 35 c of the groove producing device 35 are the bottom surface 16 c of the float 16. It is located on the upper side. Thereby, in the state where the float 16 is in contact with the rice field, the right and left wall portions 35b, 35 of the grooving device 35 are positioned on the upper side of the rice field.
As described above, the grooving plate 34 and the grooving device 35 (the front wall portion 35a, the right wall portion 35b, and the left wall portion 35c) constitute the first grooving portion 41.

[8]
Next, the connection between the medicine supply device 7 (feeding portion 32) and the groove producing device 35 will be described.
As shown in FIGS. 8 and 10, a rubber-made bellows-like connecting portion 56 is attached to the upper portion of the groove forming device 35, and a hard resin supply pipe 46 (corresponding to a first supply pipe) is connected to the connection portion. 56 is attached. The supply pipe 46 is configured as a straight pipe of a round pipe whose internal cross-sectional area does not change from the upper part to the lower part, and has a sufficient length. The longitudinal direction of the supply pipe 46 is the bottom surface 16c of the float 16. It is attached to the connecting portion 56 so as to be substantially orthogonal.

  As shown in FIGS. 8 and 10, the supply pipe 46 has a length that largely protrudes upward from the connection portion 56, and the medicine outlet 46 a located at the lower part of the supply pipe 46 is connected to the right side of the groove generator 35. It is located between the upper portions of the left wall portions 35b and 35c. The outlet 46a of the supply pipe 46 is formed obliquely in a rearward downward shape, and the rear part 46b of the outer peripheral part of the outlet 46a of the supply pipe 46 is below the front part 46c of the outer peripheral part of the outlet 46a of the supply pipe 46. positioned.

  As a result, as shown in FIGS. 8 and 10, the cross section inside the supply pipe 46 in a plane parallel to the bottom surface 16 c of the float 16 is circular, whereas the outlet 46 a of the supply pipe 46 is lowered downward. The area of the surface along the outer periphery of the outlet of the supply pipe (the slanted surface of the back-falling shape) is the inside of the supply pipe on the plane parallel to the bottom surface of the float. Equivalent to a state where the value is larger than the cross-sectional area).

As shown in FIGS. 2 and 4, the feeding part 32 is located substantially directly above the groover 35, and a funnel part 47 is attached to the lower part of the feeding part 32, so that the funnel part 47 and the supply pipe 46 are connected. A hose 36 is connected across the top.
The hose 36 is configured as a straight pipe of a round hose whose inner cross-sectional area does not change from the upper part to the lower part, and the inner diameter of the hose 36 and the inner diameter of the supply pipe 46 are set to be substantially the same. The hose 36 is connected in a substantially vertical shape (straight shape) across the upper portion of the supply pipe 46.

[9]
Next, the soil covering member 37 will be described.
As shown in FIGS. 7, 8, and 10, a horizontally long flat plate-like support member 48 is connected to the upper surface of the float 16 by a bolt 49. The right and left end portions 48a of the support member 48 are bent upward, and connection holes 48b are opened at the right and left end portions. A nut 48c is provided at the position of the connection hole 48b.

As shown in FIGS. 7, 8, and 10, a bracket 50 is formed by bending a plate material into an L-shaped cross section, and a long hole 50c for connection is opened in the vertical wall portion 50a of the bracket 50. A connecting hole (not shown) and a nut 50d are provided.
Bolts 51 are inserted into the long holes 50 c of the bracket 50 and the connection holes 48 b of the support member 48, and are fastened to the nuts 48 c of the support member 48, and the vertical wall portions 50 a of the bracket 50 are connected to the right and left sides of the support member 48. It is connected to the end 48a.

With the above structure, as shown in FIGS. 7, 8, and 10, the right and left end portions 48 a of the support member 48 and the vertical wall portion 50 a of the bracket 50 are vertically viewed along the front-rear direction. Are located on the rear side (rear side of the outlet 46a of the supply pipe 46) of the right and left wall portions 35b, 35c of the groove generator 35 (first groove portion 41), and the vertical wall portion 50a of the bracket 50 is From the right and left wall portions 35b, 35c (the outlet 46a of the supply pipe 46) of the groove forming device 35 (first groove portion 41), the groove forming device 35 extends downward (to the bottom surface 16c of the float 16). .
The right and left end portions 48a of the support member 48 and the vertical wall portion 50a of the bracket 50 are on the lateral side (the left and right center side of the float 16) of the groove forming device 35 (the outlet 46a of the supply pipe 46) in plan view, and The groove forming device 35 (the first groove forming portion 41) (the outlet 46a of the supply pipe 46) is located on the rear side.

  As shown in FIGS. 7, 8, and 10, a plate material is bent in a cross-sectional shape to form a soil covering member 37, and front and rear connecting holes 37 a and 37 b are opened in the soil covering member 37. The soil covering member 37 is connected to the bracket 50 by applying the soil covering member 37 to the lower surface of the lateral wall portion 50 b of the bracket 50, inserting the bolt 52 into the connecting holes 37 a and 37 b of the soil covering member 37, and tightening the nut 50 d of the bracket 50. ing.

With the above structure, as shown in FIGS. 7, 8, and 10, the soil covering member 37 (the base portion of the soil covering member 37) has the groove forming device 35 (first groove forming portion 41) (the outlet 46 a of the supply pipe 46) in plan view. On the lateral side (the left and right center side of the float 16) and on the rear side of the groove forming device 35 (first groove forming portion 41) (the outlet 46a of the supply pipe 46), the soil covering member 37 is a groove cutting plate. 34 and the groove forming device 35 (first groove forming portion 41) and a rearward slanting direction (laterally outer side of the float 16) extending rearward.
As shown in FIG. 8, the soil covering member 37 (the base portion of the soil covering member 37) is located on the rear side (the rear side of the outlet 46a of the supply pipe 46) of the groove forming device 35 (first groove forming portion 41) in a side view. ing.

  As shown in FIGS. 8 and 10, the position of the soil covering member 37 is moved up and down by changing the connecting position of the bracket 50 to the right and left end portions 48 a of the support member 48 along the long hole 50 c of the bracket 50. (The depth of protrusion of the covering member 37 on the paddy field can be changed).

As shown in FIGS. 7 and 8, the soil covering member 37 and the soil covering member 31 described in [12], which will be described later, are extended to the rear side of the horizontal axis P <b> 2. The depth of entry of the soil covering members 37 and 31 into the field becomes shallow.
As described in [6] above, the reference posture of the center float 16 is a slightly downwardly inclined posture with respect to the horizontal plane, and the reference postures of the right and left floats 16 are parallel to the horizontal plane. Yes.
Thereby, compared with the soil covering member 37 of the right and left float 16, since the penetration depth to the field surface of the soil covering member 37 of the center float 16 tends to be shallow, the bracket 50 of the right and left float 16 What is necessary is just to set the connection position of the bracket 50 of the center float 16 low with respect to a connection position (the side where the penetration depth to the paddy field of the covering soil member 37 becomes deep).

As shown in FIGS. 7 and 10, the connecting hole 37 b of the soil covering member 37 is formed as a long hole.
Thereby, the connection position of the covering soil member 37 with respect to the horizontal wall part 50b of the bracket 50 can be changed along the connecting hole 37b of the covering soil member 37 by using the connecting hole 37a of the covering soil member 37 as a fulcrum. Thereby, the inclination attitude | position of the soil covering member 37 with respect to the front-back direction can be changed along the bottom face 16c of the float 16. FIG.

[10]
Next, the grooving plate 28 and the grooving device 29 will be described.
As shown in FIGS. 7, 8, and 9, the grooved plate 28 is formed in a triangular plate shape in a side view, and forms a groove on the surface as the airframe advances. The groove plate 28 is connected to the float 16 together with the support member 48 (see the preceding item [9]) by a bolt 49 so as to be positioned at the bottom of the right and left rear ends of the front portion 16a of the float 16. .

  As shown in FIGS. 7, 8, and 9, the groover 29 is configured by bending a plate material into a U-shaped cross section, and includes a front wall portion 29 a, a right wall portion 29 b (corresponding to a second right wall portion), and A left wall portion 29 c (corresponding to a second left wall portion) is provided, and a front wall portion 29 a of the groove producing device 29 is connected to a rear portion of the grooved plate 28 by a bolt 53.

  As shown in FIGS. 7, 8, and 9, the width of the front wall portion 29 a of the groover 29 is substantially the same as the width of the grooved plate 28. The right wall portion 29b extends rearward, and the left wall portion 29c of the groove producing device 29 extends rearward from the left rear portion of the grooved plate 28.

As shown in FIGS. 8 and 9, in the state in which the groove producing device 29 is connected to the grooved plate 28, the right and left wall portions 29 b and 29 c of the groove producing device 29 have lower end portions 29 d of the bottom surface 16 c of the float 16. It is located on the lower side and is located at substantially the same height as the lower end of the rear part of the grooved plate 28. Thereby, in the state where the float 16 is in contact with the rice field, the lower end 29d of the right and left wall portions 29b and 29c of the groove producing device 29 is positioned below the rice field.
As described above, the groove forming plate 28 and the groove forming device 29 (the front wall portion 29a, the right wall portion 29b, and the left wall portion 29c) constitute the second groove forming portion 42.

With the above structure, as shown in FIG. 7 and FIG. 8, the grooving device 29 (second grooving portion 42) has the grooving device 35 (first grooving portion 41) (the outlet 46 a of the supply pipe 46) in plan view. On the lateral side (the left and right central side of the float 16) and on the rear side of the groove forming device 35 (first groove forming portion 41) (the outlet 46a of the supply pipe 46).
The grooving device 29 (second grooving portion 42) is on the side opposite to the grooving device 35 (first grooving portion 41) with respect to the soil covering member 37 in the left-right direction in the plan view (the left and right center side of the float 16). It is located on the lateral side of a certain groove device 35 (first groove portion 41).

As shown in FIGS. 7 and 8, the groove producing device 29 (second groove producing portion 42) is rear side of the groove producing device 35 (first groove producing portion 41) in the side view (rear side of the outlet 46 a of the supply pipe 46). ).
The front portion of the grooving plate 28 (second groove portion 42) is located below the right and left wall portions 35b, 35c (first groove portion 41) of the groover 35 in a side view. The vessel 29 (second groove forming portion 42) overlaps with the soil covering member 37 in a side view.

[11]
Next, the connection between the fertilizer application device 6 (feeding portion 26) and the grooving device 29 will be described.
As shown in FIGS. 8 and 9, a rubber connection portion 54 is attached to the upper portion of the groove forming device 29. The connecting portion 54 includes a bellows portion 54a attached to the upper portion of the groove generator 29, a supply pipe 54b (corresponding to a second supply pipe), and a connection pipe 54c, and is integrally formed. The supply pipe 54b and the connection pipe 54c of the connection portion 54 are configured as a straight pipe of a round pipe whose internal cross-sectional area does not change from the upper part to the lower part, and are connected so as to cross each other obliquely.

  As shown in FIGS. 8 and 9, the longitudinal direction of the supply pipe 54 b of the connection portion 54 is substantially orthogonal to the bottom surface 16 c of the float 16 in a state where the connection portion 54 is attached to the groove generator 29. The fertilizer outlet 54d located at the lower portion of the supply pipe 54b of the connecting portion 54 is located between the right and left wall portions 29b and 29c of the groove producing device 29.

  As shown in FIGS. 8 and 9, in a state where the connection portion 54 is attached to the groove generator 29, the connection pipe 54 c of the connection portion 54 extends obliquely upward toward the front. As shown in FIG. 2, the feeding portion 26 is positioned on the front side above the grooving device 29, the outlet 26 a of the feeding portion 26 faces obliquely downward toward the rear, and the outlet 26 a of the feeding portion 36 is connected to the connecting portion. The hose 30 is connected to 54 connecting pipes 54c.

  As shown in FIG. 2, the hose 30 is configured so as to gradually become thinner from the outlet 26 a of the feeding portion 36 toward the connection pipe 54 c of the connection portion 54, and is bent slightly in a crank shape in a side view. Is in a state (close to vertical) that is substantially orthogonal to the bottom surface 16 c of the float 16.

[12]
Next, the soil covering member 31 will be described.
As shown in FIGS. 7, 8, and 9, the covering member 31 is configured by bending a plate material into a cross-sectional shape, and front and rear connecting holes (not shown) are opened in the covering member 31. Flat plate-shaped flange portions 16d are formed on the right and left sides of the rear portion 16b of the float 16. The soil covering member 31 is applied to the lower surface of the flange portion 16 d of the float 16, and the soil covering member 31 is connected to the flange portion 16 d of the float 16 by a bolt 55.

  7, 8, and 9, the soil covering member 31 (the base portion of the soil covering member 31) covers the groove forming device 29 (second groove forming portion 42) in the left-right direction in a plan view. It is located on the lateral side of the grooving device 29 (second grooving portion 42) which is the side opposite to the member 37 (the left and right center side of the float 16). The soil covering member 31 is extended to the groove by the grooving plate 28 and the grooving device 29 (second grooving portion 42) and obliquely rearward (laterally outside the float 16) toward the rear, and the soil covering members 31, 37 are along each other. Are extended in the same direction. The soil covering member 31 (the base of the soil covering member 31) overlaps with the groove forming device 29 (second groove forming portion 42) in a side view.

[First Alternative Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention], it may be configured as shown in FIG.
As shown in FIG. 11, the soil covering member 37 is positioned on the lateral side (left and right center side of the float 16) of the grooving device 35 and on the rear side of the grooving device 35 in a plan view. 16 laterally outward).
The groover 29 is arranged on the side of the groover 35 that is opposite to the groover 35 with respect to the soil covering member 37 in the left-right direction (the left and right center side of the float 16), and after the groover 35. It is located on the side and overlaps with the soil covering member 37 in a side view.
The soil covering member 31 is positioned on the lateral side of the groove forming device 29 that is on the soil covering member 37 side (the lateral outer side of the float 16) with respect to the groove forming device 29 in the left-right direction, and obliquely rearward (the left and right central side of the float 16). To extend. In this case, the soil covering member 31 may be located at a position overlapping the groove generator 29 in a side view.

[Second Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention], it may be configured as shown in FIG.
As shown in FIG. 12, the soil covering member 37 is positioned on the lateral side of the groove producing device 35 (laterally outside the float 16) and on the rear side of the groove producing device 35 in a plan view, and obliquely rearward (float 16 To the left and right center).
The grooving device 29 is disposed on the side of the grooving device 35 that is opposite to the soil covering member 37 with respect to the grooving device 35 in the left-right direction (the left and right center side of the float 16), and after the grooving device 35. It is located on the side and overlaps with the soil covering member 37 in a side view.
The soil covering member 31 is positioned on the lateral side of the groove producing device 29 on the opposite side (left and right center side of the float 16) from the soil covering member 37 with respect to the groove producing device 29 in the left-right direction. Extends laterally outward). In this case, the soil covering member 31 may be located at a position overlapping the groove generator 29 in a side view.

[Third Another Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention], a configuration as shown in FIG.
As shown in FIG. 13, the soil covering member 37 is positioned on the lateral side of the groove producing device 35 (laterally outside the float 16) and on the rear side of the groove producing device 35 in plan view, and obliquely rearward (float 16 To the left and right center).
The grooving device 29 is disposed on the side of the grooving device 35 that is opposite to the soil covering member 37 with respect to the grooving device 35 in the left-right direction (the left and right center side of the float 16), and after the grooving device 35. It is located on the side and overlaps with the soil covering member 37 in a side view.
The soil covering member 31 is positioned on the lateral side of the groove forming device 29 that is on the soil covering member 37 side (the lateral outer side of the float 16) with respect to the groove forming device 29 in the left-right direction, and obliquely rearward (the left and right central side of the float 16). To extend. In this case, the soil covering member 31 may be located at a position overlapping the groove generator 29 in a side view.

[Fourth Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention], it may be configured as shown in FIG.
As shown in FIG. 14, the soil covering member 37 is positioned on the lateral side (left and right center side of the float 16) of the grooving device 35 and on the rear side of the grooving device 35 in a plan view. 16 laterally outward).
The grooving device 29 is disposed on the side of the grooving device 35 that is opposite to the soil covering member 37 with respect to the grooving device 35 in the left-right direction (on the lateral side of the float 16), and on the rear side of the grooving device 35. And overlap with the soil covering member 37 in a side view.
The soil covering member 31 is positioned on the lateral side of the groove forming device 29 on the side of the soil covering member 37 (the left and right center side of the float 16) with respect to the groove forming device 29 in the left-right direction, and obliquely rearward (laterally outside the float 16). To extend. In this case, the soil covering member 31 may be located at a position overlapping the groove generator 29 in a side view.

[Fifth Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention], a configuration as shown in FIG.
As shown in FIG. 15, the soil covering member 37 is positioned on the lateral side of the grooving device 35 (laterally outside the float 16) and on the rear side of the grooving device 35 in plan view, and obliquely rearward (float 16 To the left and right center).
The grooving device 29 is arranged on the lateral side of the grooving device 35 that is opposite to the grooving device 35 (laterally outside the float 16) with respect to the soil covering member 37 in the left-right direction, and on the rear side of the grooving device 35. And overlap with the soil covering member 37 in a side view.
The soil covering member 31 is positioned on the lateral side of the groove forming device 29 on the side of the soil covering member 37 (the left and right center side of the float 16) with respect to the groove forming device 29 in the left-right direction, and obliquely rearward (laterally outside the float 16). To extend. In this case, the soil covering member 31 may be located at a position overlapping the groove generator 29 in a side view.

[Sixth Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention], it may be configured as shown in FIG.
As shown in FIG. 16, the soil covering member 37 is positioned on the lateral side of the groove producing device 35 (left and right center side of the float 16) and on the rear side of the groove producing device 35 in a plan view, and obliquely rearward (float). 16 laterally outward).
The grooving device 29 is disposed on the side of the grooving device 35 that is opposite to the soil covering member 37 with respect to the grooving device 35 in the left-right direction (on the lateral side of the float 16), and on the rear side of the grooving device 35. And overlap with the soil covering member 37 in a side view.
The soil covering member 31 is positioned on the lateral side of the groove producing device 29 that is opposite to the soil covering member 37 (laterally outside the float 16) with respect to the groove producing device 29 in the left-right direction, and obliquely rearward (left and right of the float 16). Extend to the center). In this case, the soil covering member 31 may be located at a position overlapping the groove generator 29 in a side view.

[Seventh Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention], a configuration as shown in FIG.
As shown in FIG. 17, the soil covering member 37 is positioned on the lateral side of the groove producing device 35 (laterally outside the float 16) and on the rear side of the groove producing device 35 in a plan view, and obliquely rearward (float 16 To the left and right center).
The grooving device 29 is arranged on the lateral side of the grooving device 35 that is opposite to the grooving device 35 (laterally outside the float 16) with respect to the soil covering member 37 in the left-right direction, and on the rear side of the grooving device 35. And overlap with the soil covering member 37 in a side view.
The soil covering member 31 is positioned on the lateral side of the groove producing device 29 that is opposite to the soil covering member 37 (laterally outside the float 16) with respect to the groove producing device 29 in the left-right direction, and obliquely rearward (left and right of the float 16). Extend to the center). In this case, the soil covering member 31 may be located at a position overlapping the groove generator 29 in a side view.

[Eighth Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention] to [Seventh Mode for Carrying Out the Invention], one float 16 is provided with two sets of grooving plates 34 and a grooving device 35 (first grooving portion 41). Two sets of grooving plates 28 and a grooving device 29 (second grooving portion 42), two sets of soil covering members 37, and two sets of soil covering members 31 are provided. Groove plate 34 and groove generator 35 (first groove portion 41), one set of groove plate 28 and groove device 29 (second groove portion 42), one set of soil covering member 37, one set of soil covering member 31 You may comprise so that it may be provided.

[Ninth Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention] to [Eighth Embodiment of the Invention], the soil covering member 31 may not be provided.

  The present invention can be applied not only to a riding type direct sowing machine but also to a riding type rice transplanter, and not only two kinds of agricultural powder, but also paddy field work for supplying three or more kinds of agricultural powder to the rice field. It can also be applied to machines.

16 Float 16c Float bottom 26 Second feeding portion 27 Second storage portion 28 Second groove forming body 29b Second right wall portion 29c Second right wall portion 29d Second right wall portion jumping Lower end portion of second left wall portion 31 Second covering member 32 First feeding portion 33 First storage portion 34 First groove forming body 35b First right wall portion 35c First left wall portion 35d First lower end portion of first right wall portion and first left wall portion 37 First DESCRIPTION OF SYMBOLS 1 Covering member 41 1st groove part 42 2nd groove part 46 1st supply pipe 46a Outlet of 1st supply pipe 50a Vertical wall part 54b 2nd supply pipe 54d 2nd outlet of 2nd supply pipe

Claims (7)

A first reservoir for storing the first granular material is a drug, the feeding and the second storage unit for storing the second granular material is a fertilizer, the first granular material from the first reservoir 1 comprising a feeding portion, a second feeding section for feeding the second granules from said second reservoir,
Comprising a float and a first installment groove portion and the second installment groove portion for forming a groove in the paddy with the progress of the aircraft, a first cover soil member Ru fill the groove formed by said first Sakumizo portion extending in the front fuselage And
The first soil covering member has a bracket, and a front end portion of the bracket is located between the first groove forming portion and the second groove forming portion in the float width direction, and a rear end of the first soil covering member. The portion extends rearward so as to be located outside the first groove portion in the float width direction, In a side view, part of the bracket is overlapped with a portion of the first film groove, and, a part of the first soil cover member overlaps with a part of the second installment groove portion,
A second soil covering member that fills a groove formed by the second grooving part to which the second granular material is supplied as the airframe progresses,
Paddy field work in which the second soil covering member is provided at a position on the lateral side of the second groove forming portion in a position where a part of the second soil covering member overlaps with a part of the second groove forming portion in a side view. Machine. A second soil covering member to fill the grooves by the said second Sakumizo portion second granular material is supplied with the progress of the aircraft,
The base portion of the second soil covering member is positioned in a lateral direction of the second groove forming portion, which is opposite to the first soil covering member with respect to the second groove forming portion in the left-right direction. In preparation for the position overlapping the groove,
The paddy field work machine according to claim 1 , wherein the second soil covering member extends obliquely rearward toward the groove formed by the second groove forming portion and rearward. The first groove forming portion includes a first groove forming body that forms a groove on the surface, and a first groove forming device that is connected to the first groove forming body, wherein the first groove forming device includes the first groove forming device. A first front wall connected to the rear surface of the groove forming body, a first right wall extending backward from a right edge of the first front wall, and a left side of the first front wall. A first left wall extending rearward from the edge,
The lower end portion of the first right wall portion and the first left wall portion on the rear side of the machine body is located above the bottom surface of the float, and is located below the first supply pipe connected to the first groove forming portion. The rice field work machine according to claim 1 or 2 , wherein an outlet of the first granular material is located between the first right wall portion and the first left wall portion. A first supply pipe connected to the first groove portion and the second groove portion, the first powder body and the second powder body fed by the first feed portion and the second feed portion; and The second supply pipe is configured to be supplied to the grooves formed on the surface by the first groove portion and the second groove portion,
The second groove forming portion has a second groove forming body for forming a groove on the surface, a second right wall portion extending rearward from the right portion of the rear portion of the second groove forming body, and the second groove forming. A second left wall extending rearward from the left rear part of the body,
The lower end portion of the second right wall portion and the second left wall portion is located below the bottom surface of the float,
The outlet of the second granular material which is located below the second supply pipe, any one of claims 1 to 3 which is located between the second right wall portion and the second left wall portion Paddy field work machine described in 1. And connecting the first installment groove in the float,
A vertical wall portion extending vertically is connected to the float portion at a position lateral to the first groove portion and at the rear side of the first groove portion, and the first wall portion is connected to the first wall portion. The paddy field machine as described in any one of Claims 1-4 which has connected the soil covering member. The paddy field machine according to claim 5 , wherein the position of the first soil covering member can be changed up and down. The paddy field work machine according to claim 6 , wherein the inclined posture of the first soil covering member with respect to the front-rear direction can be changed along the bottom surface of the float.

Images