JP5249802B2 - Leveling float structure of paddy field machine - Google Patents

Description

  The present invention relates to a leveling float structure of a paddy field machine provided with a leveling float having a width corresponding to three or more.

As a leveling float, a float main body portion (within the publication: the float front portion 13) having a width corresponding to the entire strip, and three rear overhang portions (within the publication: the float rear portion 12) extending rearward from the float body portion There is one that presents a float composed of: a bottom body portion that is hung from a rear end portion of a float main body portion to a rear overhang portion, and a series of plate materials are circulated (Patent Document 1).

Japanese Patent No. 2641636 (paragraph numbers [0010] [0011], FIG. 1 and FIG. 3)

  Therefore, since the plate-like bottom surface portion is grounded over a wide range from the float main body portion to the rear overhang portion, the mud is in contact with the plate-like bottom surface portion and the mud soil is in contact with the plate-like bottom surface portion. If the mud stays at the front end of the plate and flows to the lateral side along the front end of the plate-like bottom surface, the mud that has flowed out affects the adjacent strips (for example, pushes down existing seedlings). There was a fear.

  It is an object of the present invention to suppress mud pushing even with a leveling float having a width corresponding to three or more strips, to suppress the influence on adjacent strips, and the float passage trace of the leveling float is on the field surface. It is to provide a leveling float structure for a paddy field machine that is difficult to be formed and is well planted.

(Constitution)
The characteristic configuration of the invention according to claim 1 is a belt-like shape in which a leveling float having a lateral width corresponding to three or more is provided, and a strip shape along the lateral width direction is provided over the entire lateral width or substantially the entire length of the bottom surface of the leveling float. Forming a leveling part, and a mud relief indented part that indents upward to guide mud behind to a position that is laterally disengaged from the center position in the left-right direction of the belt-shaped leveling part , and the mud relief indented part the laterally outer side the mud relief forming a first ground leveling flat portion projecting downwardly from the recess, a first inclined left and right direction in the boundary portion between said mud relief recess the first ground leveling flat portion the inclined connecting surface is formed, and the center side mud uptake recess for taking mud soil from the front end of the bottom surface at the lateral center portion of the bottom surface of the ground leveling float toward the rear, located behind the center-side mud uptake recess Central mud intake Forming a fourth ground leveling flat portion projecting downwardly from the recess, and the center side mud capture recess and adjacent to the left and right sides second ground leveling flat portion projecting from the lower the center side mud uptake recess A second inclined connecting surface inclined in the left-right direction is formed on the boundary surface, and the mud escaping recessed portion is adjacent to the left and right lateral sides of the central mud intake recessed portion, and the second ground flat portion There in that is arranged to exist between the 1 ground leveling flat part, the effects thereof are as follows.

(Function)
That is, the farm surface is leveled by the belt-shaped leveling portion, and, for example, seedlings can be planted on the leveled farm surface, so that the planting line is formed with good appearance.

In the section of the problem to be solved by the invention, when the bottom surface of the leveling float is formed on the same plane over the entire strip, mud pool is likely to occur at the front end of the bottom surface, and the accumulated mud is The point which flows further laterally from the side end along the front end of the portion and acts on the adjacent strips may be affected.
On the other hand, in the present invention, since the mud escape recessed part that is recessed upward is formed in a part of the belt-shaped leveling part, the mud can be caused to flow behind the leveling float through the mud escape recessed part. It is possible to suppress the accumulation of mud at the front end of the belt-shaped leveling portion and the influence on adjacent strips.

In addition to the above-described configuration, in the belt leveling portion, the mud escape recessed portion and the first leveling flat portion located below the mud escape recessed portion are disposed adjacent to each other, and the boundary surface between the two is accompanied by a large step. If it is a thing, a step mark will be formed on the field.
On the other hand, in the present invention, since the first inclined connecting surface inclined in the left-right direction is formed at the boundary portion between the mud escape recessed portion and the first leveling flat portion, a step may be formed at the boundary portion. There are few float traces on the field.

  On the other hand, since the center side mud intake recessed part which goes back from the front end of the said bottom face is formed in the left-right center part in the bottom face of a leveling float, the following points can be said. In other words, in the case of the configuration in which the center side mud intake recess is not provided, the muddy soil blocked by the front end of the leveling float flows laterally along the front end and further reaches the adjacent region. I couldn't suppress it. As a result, for example, mud soil that has flown into adjacent planted seedlings or the like may have an effect on adjacent strips.

  On the other hand, in this invention, since the center side mud taking in recessed part was formed, it became possible to guide the mud soil from the front into the mud taking in recessed part, and to make it flow backward. Therefore, it was not made to flow to the lateral side of the leveling float more than necessary, and the influence on adjacent strips could be suppressed.

A second leveling flat portion protruding downward from the central mud intake recess is formed at the periphery of the central mud intake recess. And since the 2nd inclined connection surface inclined in the left-right direction was formed in the boundary part of the center side mud taking-in recessed part and the 2nd leveling flat part, a level | step difference is rarely formed in a boundary part. It is difficult to form a float passage mark.

(Effect of the invention)
By providing a belt-shaped leveling section that spans the width of the leveling float, the leveling condition can be made constant over the entire width, and by making improvements to form a mud escape recess in a part of the belt-leveling section, It is possible to suppress the accumulation of mud at the front end of the belt-shaped leveling portion and the influence on adjacent strips.
In addition, by forming the mud escape concave part, a step is formed between the adjacent first leveling flat parts, and the mud escape concave part and the first leveling part are formed by the first inclined connecting surface inclined in the left-right direction. Since the boundary portion with the flat portion is gently connected, a step mark is not formed, and the disturbance of the stripe is small.

Furthermore, by forming the center-side mud intake recess, the mud soil can be prevented from flowing to the side of the leveling float and the influence on the adjacent strips can be suppressed, and this center-side mud intake recess is formed. By doing so, it has been possible to provide a leveling float structure for a paddy field work machine that eliminates the formation of a step between adjacent second leveling flat parts by forming a second inclined connecting surface inclined in the left-right direction . .

(Constitution)
The characteristic configuration of the invention according to claim 2 resides in that a side-side mud taking-in recessed portion that takes in mud is formed in a portion of the bottom surface of the leveling float that smoothes the propulsion wheel trace, and its action. The effect is as follows.

(Function and effect)
That is, since the side mud uptake recessed part is formed on the rear side of the propulsion wheel, the mud raised up to the side of the wheel mark is taken into the side mud uptake recessed part and buried in the wheel mark. It is possible to return, and the posture disorder of what is applied to the wheel marks can be suppressed.

(Constitution)
Point characteristic configuration of the invention according to claim 3, in which said central side mud uptake recesses, the boundary portion between the front Symbol fourth ground leveling flat portion, is formed a third inclined connecting surface which inclined obliquely in the longitudinal direction The effects are as follows.

(Function and effect)
The mud taken in the center-side mud take-in recess is guided to the surface leveled by the fourth leveling flat surface at the third inclined connecting surface, and is leveled without any step. Thereby, there is little disturbance of leveling marks, and work on the field surface is performed well.

(Constitution)
According to a fourth aspect of the present invention, there is provided the side-side mud intake recessed portion and a third leveling that is located behind the side-side mud intake recessed portion and projects downward from the side-side mud intake recessed portion. a boundary portion between the flat portion located at a point that is forming the fourth inclined connecting surface which inclined obliquely in the longitudinal direction, the effects thereof are as follows.

(Function and effect)
The mud taken in the side-side mud taking-in recess is guided to the surface leveled by the third leveling flat surface at the fourth inclined connecting surface, and is leveled without any step. As a result, the wheel marks are well leveled and work is performed well.

(Constitution)
The characteristic configuration of the invention according to claim 5 is that the end surface of the leveling float side end is deviated toward the front and rear direction surface along the propulsion direction or the rear end side of the end surface toward the left and right center side of the leveling float. The function and effect are as follows.

(Function and effect)
The end surface of the leveling float side end is formed in the front-rear facing surface along the propulsion direction, or the offset surface that is deviated toward the left and right center side of the leveling float toward the rear end side of the end surface. The muddy soil flowing along the end face is less likely to be swept laterally, and inconvenience to adjacent strips can be suppressed.

(Constitution)
According to a sixth aspect of the present invention, there is provided a vertical wall projecting upward from the upper surface of the leveling float at a front end of the leveling float and at a rear part of the wheel leveling the propulsion wheel trace. The function and effect are as follows.

(Function and effect)
By forming a vertical wall in the part located behind the propulsion wheel, it is possible to receive the mud that the propulsion wheel jumps up, and to prevent the mud from adhering and accumulating on the upper surface of the leveling float.

It is a whole side view showing a riding type rice transplanter. It is a whole top view showing a riding type rice transplanter. It is a side view which shows a leveling float. It is a top view which shows a leveling float. It is a rear view which shows a leveling float. It is a bottom view which shows a leveling float. It is the VII-VII sectional view taken on the line in FIG. It is the VIII-VIII sectional view taken on the line in FIG. It is the IX-IX sectional view taken on the line in FIG. FIG. 7 is a sectional view taken along line XX in FIG. 6. It is the XI-XI sectional view taken on the line in FIG. It is the XII-XII sectional view taken on the line in FIG. It is the XIII-XIII sectional view taken on the line in FIG. It is the XIV-XIV sectional view taken on the line in FIG.

A riding type rice transplanter as an example of a paddy field working machine will be described. As shown in FIGS. 1 and 2, the riding type rice transplanter is provided with an engine 4 or the like in the front part of a traveling machine body 3 equipped with front and rear wheels 1 and 2 as propulsion wheels, and behind the driving control part 5. A seedling planting device 7 is provided via a lifting link mechanism 6 and is configured as a four-row planting rice transplanter.
The seedling planting device 7 includes a seedling setting table 8, a planting transmission case 9 in a front-rear posture positioned below the seedling mounting table 8, and a seedling planting mechanism provided on the left and right of the rear end of the planting transmission case 9. 10. The planting transmission case 9 is equipped with a leveling float 11 that can swing up and down around the rear fulcrum.

The leveling float 11 will be described. As shown in FIGS. 3 to 6, the leveling float 11 has a horizontally long float main body 12 having a horizontal width L corresponding to the total planting width, and the left and right center positions of the float main body 12. And a pair of left and right rear overhang portions 14 extending rearward from two left and right directions of the float main body portion 12.
The front projecting portion 13 projects from the left and right center position of the front end of the float main body portion 12 toward the front, and has a function as a sensor float used for planting control.

  The front overhanging portion 13 and the rear overhanging portion 14 exhibit a lateral width of one third to one quarter of the lateral width of the float main body portion 12. The float main body 12, the front overhanging portion 13, and the rear overhanging portion 14 are integrally formed by blow molding in which two resin plates are stacked and placed in a mold, and compressed air is blown between the two resin plates. Yes. As the resin material used, engineering resins such as nylon, polyethylene, ABS, and PET are used.

  As shown in FIGS. 3 to 6, the front overhang portion 13 and the float main body portion 12 located behind the front overhang portion 13 are floated with respect to the rear end portion of the float main body portion 12 in a side view. The front end portion side of the main body 12 and the front overhanging portion 13 are formed to be slightly curved upward. The lateral portion 12A located on the lateral side of the front overhanging portion 13 in the float body portion 12 is also formed to be slightly curved upward toward the front end side with respect to the rear end portion.

  Since the leveling float 11 is blow-molded by superposing two resin plates, a flange part 11a that clearly indicates a parting line is formed at the middle position of the leveling float 11 as a shape after molding. The outer shell of the float bulges up and down with respect to the flange portion 11a.

  A description will be given of the belt-shaped leveling portion A that is a portion that comes into contact with the farm surface when the vehicle is traveling. That is, as shown in FIGS. 3 and 6, the front-rear width in the front-rear direction of the float main body 12 is shortened on the bottom surface of the rear end portion of the float main body 12 over the lateral width corresponding to the entire planting strip. A strip-shaped leveling portion A having a strip shape is formed. In FIG. 6, the belt-shaped leveling portion A clearly shows the region by a two-dot chain line. The strip leveling part A will be described later.

[Top structure of leveling float]
The shape of the upper surface of the leveling float 11 will be described. As shown in FIGS. 4, 5 and 9, in the front overhanging portion 13, the upper surface is formed on an inclined flat surface 13A which is located upwardly toward the front end side and is gently inclined, and extends laterally from the front end of the inclined flat surface 13A. A forward downward inclined surface 13 </ b> C that is inclined forward and downward toward the side is formed. As shown in FIGS. 4, 11, and 12, a mounting surface 13 </ b> B that is recessed downward is provided near the front end of the forward downward inclined surface 13 </ b> C. A front bracket 15 for hanging and supporting the leveling float 11 on the machine body frame side is attached to the mounting portion 13B.

  The mounting surface 13B formed in a state of being recessed downward is partly cut out of the inclined flat surface 13A and the front downward inclined surface 13C so as to open to the front space at the front end of the front overhanging portion 13. . Thus, since the mounting surface 13B is in a state of communicating with the front space, it is possible to guide the muddy water on the farm surface onto the inclined flat surface 13A.

With such a configuration, muddy water can be introduced onto the inclined flat surface 13A, so that the muddy water is pushed away at the front end of the forward overhanging portion 13 and the pushed muddy water is prevented from pushing down adjacent planted seedlings. it can.
Further, since muddy water acts as a running resistance at the front end of the front overhanging portion 13, the vertical swing of the leveling float 11 is not stable due to the resistance, and the vertical fluctuation based on the ground pressure of the leveling float 11 is used. Then, the planting control for maintaining the planting height to be constant can reduce the muddy water resistance by the above-described notch, and can ensure the stability of the control.

As shown in FIG. 3, the left and right rear projecting portions 14 are formed with mounting seats 14 </ b> A in which mounting holes and the like are formed, and the rear bracket 20 that forms the rear fulcrum a of the leveling float 11 is fixedly mounted. It is configured.
Since the mounting seat 14A is provided near the rear end of the rear overhanging portion 14, the mounting seat 14A and the rear end of the rear overhanging portion 14 are in close proximity to each other. Therefore, even when the leveling float 11 rotates upward around the rear fulcrum a of the rear bracket 20, the depth at which the rear end of the rear overhanging portion 14 enters the farm surface is not so large, and the belt-shaped leveling portion A is applied. There is little disturbance to the ground leveling.

  As shown in FIGS. 4, 5, and 10, downward recessed installation portions 12 </ b> C are formed at four locations in the left-right direction at the rear end of the float body 12. The recessed installation portion 12C is configured to mount a groove producing device (not shown) through an attachment hole when a fertilizer application device (not shown) is mounted on the rear part of the machine body.

  As shown in FIGS. 3 to 5, the front end of the lateral portion 12 </ b> A located on the left and right lateral sides of the left and right central portion where the forward projecting portion 13 of the float main body 12 projects is integrated from the upper surface of the lateral portion 12 </ b> A. In particular, a vertical wall 21 is erected.

  The vertical wall 21 is continuous from the root position, which is a connection site of the front overhang portion 13 to the float main body portion 12, toward the left and right lateral ends, and is slightly obliquely upward and forward from the upper surface of the lateral portion 12A. And projecting. The vertical wall 21 has a function of receiving mud that the rear wheel 2 positioned in front of the lateral part 12A jumps up and suppressing the mud from adhering and accumulating on the upper surface of the lateral part 12A.

The lateral end 12a of the lateral part 12A of the float body 12 is formed in a direction perpendicular to the front end, and the end surface of the lateral end 12a is formed in a plane along the propulsion direction.
As described above, since the end surface of the lateral end 12a is formed in a plane along the propulsion direction, the muddy soil flowing along the end surface of the lateral end 12a is less likely to be swept laterally, and adjacent seedlings Inconvenience such as pushing down can be suppressed.

  In the above configuration, the end surface of the lateral end 12a is configured as a surface along the propulsion direction, but the end surface of the lateral end 12a is closer to the left and right center side of the leveling float 11 toward the rear end side in the propulsion direction. You may comprise in the state inclined with respect to. Thereby, the function which suppresses that the already-planted seedling to which mud soil adjoins flows into a crocodile can be improved.

[Bottom structure of leveling float]
As shown in FIGS. 6 and 11, a center-side mud intake recess 23 is formed across the bottom surface of the front overhang portion 13 and the bottom surface of the portion of the float main body portion 12 located behind the front overhang portion 13. It is. The center-side mud intake recess 23 is recessed upward from the front end position of the front overhanging portion 13 in a side view, and maintains a substantially constant recess depth along the curved state of the bottom surface. It is formed up to the vicinity of the rear end of the main body 12.

  The bottom view shape of the center side mud intake recess 23 is as follows. The center-side mud intake recess 23 is opened from the front end position of the front overhang portion 13, and the fan-like intake portion 23A that enters the rear side in a state where the width of the opening 23a is gradually narrowed, the front overhang portion 13 and the float body It has a minimum lateral width at a position corresponding to the connecting portion with the portion 12, and is composed of a narrow width portion 23B extending to the rear end portion of the float main body 12 while maintaining the minimum lateral width.

  In the case of the conventional configuration in which the central mud intake recess 23 is not provided, the mud soil blocked by the front end of the front overhanging portion 13 flows to the front end side of the lateral portion 12A of the float main body 12 and further adjoins. It could not be suppressed to reach the planting area. As a result, the mud that flowed in the adjacent planted seedlings sometimes fell down.

  On the other hand, in this invention, since the mud intake recessed part 23 was formed in the front overhang | projection part 13, it became possible to guide the mud soil from the front into the mud intake recessed part 23, and to make it flow back. It was. Therefore, it was not possible to flow more than necessary to the side portion 12A side, and it was possible to suppress the existing seedlings and the like from falling down.

Next, the side-side mud intake recess 24 that takes in the mud, which is formed on the bottom surface of the lateral portion 12A of the float main body 12 that smoothes the propulsion wheel traces, will be described.
As shown in FIGS. 6 and 8, the side-side intake recessed portion 24 opens from the front end of the lateral portion 12A of the float main body 12, and the ceiling surface 24b of the side-side intake recessed portion 24 in the side view is , Formed in a curved shape along the curved shape of the bottom surface of the float main body 12 (the first leveling flat portion 26A described later) and extending rearward, and the same at the rear end portion of the first leveling flat portion 26A The rear end side becomes gradually shallower so as to be at the height position, and is connected to the horizontal surface 26a of the third leveling portion 26C without a step. Thus, the rear end portion of the side-side intake recessed portion 24 is connected to the third leveling portion 26C without a step, and this rear end portion is referred to as a fourth inclined connecting surface 24D.

  The bottom view shape of the side-side mud intake recess 24 is as follows. As shown in FIG. 6, the side-side mud intake recess 24 is opened from the front end of the lateral portion 12A of the float body 12, and the fan-like shape enters the rear side in a state where the lateral width of the opening 24a is gradually reduced. It has a concave shape.

  With such a configuration, mud soil swelled on both lateral sides of the wheel marks formed by the front and rear wheels 1 and 2 is taken into the side mud take-in recessed portion 24 through the wide opening 24a, and the lateral width is gradually reduced. And it can push down by the ceiling surface 24b of the side side taking-in recessed part 24, and the taken-in mud can be brought near a wheel trace, and a wheel trace can be refilled.

  As shown in FIGS. 5, 6, and 10, between the center-side mud intake recess 23 and the side-side mud intake recess 24 located on both sides thereof, and laterally outward of the side-side mud intake recess 24. On the side, a mounting seat 25 used for mounting the groove forming device is formed together with a recessed mounting portion 12C for groove mounting mounting that is recessed toward the upper surface. Thus, since the mounting seat 25 is formed so as to be greatly recessed above the bottom surface, even if the mounting tool is inserted into the mounting seat 25, the leveling surface is rarely roughened.

Next, the part except the center side mud intake recess 23, the side mud intake recess 24, and the groove holder mounting seat 25 on the bottom surface will be described.
As shown in FIGS. 6-11, the bottom face part 26 is formed in the circumference | surroundings surrounding the center side mud taking-in recessed part 23, and the front bottom face part 26E of the bottom face parts 26 is located in the upper part at the front end side in a side view. It is formed in a curved shape. The rear bottom surface surrounding the narrow portion 24B of the center-side mud intake recess 23 is a portion that protrudes most downward on the bottom surface of the entire leveling float 11. Of the rear bottom surface portion, a portion surrounding the narrow portion 24B from the left and right sides is referred to as a second leveling flat portion 26B, and a portion positioned behind the narrow width portion 24B is referred to as a fourth leveling flat portion 26D.

  As shown in FIG. 6, a recessed portion 27 that is recessed above the second leveling flat portion 26B and the fourth leveling flat portion 26D on both lateral sides of the second leveling flat portion 26B and the fourth leveling flat portion 26D. Is formed. The recessed portion 27 is formed in a region from the second leveling flat portion 26B and the fourth leveling flat portion 26D to the vicinity of the side mud intake recessed portion 24, and the front-rear width thereof is substantially the front-rear width of the float body portion 12. It is formed in the width over.

  The recessed portion 27 is divided into two regions on the left and right, and the inclination of the bottom surface is different. That is, as shown in FIGS. 6 and 10, the recessed portion 27 is formed on both lateral sides of the second leveling flat portion 26 </ b> B and the fourth leveling flat portion 26 </ b> D surrounding the narrow width portion 24 </ b> B of the center-side mud intake recessed portion 23. The second recessed portion 27B adjacent to the first recessed portion 27A disposed adjacent to the second recessed portion 27B and close to the side mud intake recessed portion 24, as shown in FIGS. It is composed of.

  As shown in FIGS. 6 and 10, the second recessed portion 27 </ b> B is formed in a linear inclined surface 27 a that is inclined so as to be gradually positioned downward toward the front end side in a side view, and is centered at the front end position. It is connected to the front end bottom surface portion 26E surrounding the fan-shaped intake portion 23A of the side mud intake recessed portion 23.

On the other hand, as shown in FIGS. 6 and 9, the first recessed portion 27 </ b> A is formed on the curved surface 27 b located on the upper side of the front end in a side view, and a straight line is formed at the rear end of the float main body 12. It is formed on a flat surface 27c.
As shown in FIGS. 5, 10, and 11, both the first recessed portion 27 </ b> A and the second recessed portion 27 </ b> B are formed up to the rear end of the float main body 12, and near the rear end of the float main body 12, The height of the flange portion 11a is aligned.

  The first recessed portion 27 </ b> A described above is configured to take in the muddy soil flowing along the peripheral edge portion of the front overhang portion 13 and to flow backward. Here, the first recessed portion 27A is referred to as a mud escape recessed portion described in claim 1 and recessed upward to guide the mud behind.

  As shown in FIGS. 6-8, the 1st leveling flat part 26A and the 3rd leveling flat part 26C are formed in the circumference | surroundings of the side side mud taking in recessed part 24, and the 1st leveling flat part 26A is a side. It is located on both lateral sides of the side mud intake recess 24, and as described above, it is formed in a curved shape that is positioned upwardly toward the front end side along the curved shape of the bottom surface of the float main body 12 in a side view.

  As shown in FIGS. 6-8, the 3rd leveling flat part 26C is provided in the back side of the side-side mud taking-in recessed part 24, and the horizontal part 26a continues in the back of the 1st leveling flat part 26A. The horizontal portion 26 a is a portion located at the lowest position of the leveling float 11. On the rear side of the horizontal portion 26a, a rear rising inclined surface 26b is formed so as to be located closer to the rear end of the rear overhang portion 13. The horizontal portion 26a and the rearward rising inclined surface 26b form a third leveling flat portion 26C.

The rear end of the side mud intake recessed portion 24 is connected to the front end of the horizontal portion 26a without a step, and the mud soil taken into the side mud intake recessed portion 24 does not stay at the connection site, and the horizontal portion 26a. Flow to the side.
In addition, since the inclined surface 26b that is inclined upward toward the rear side is formed on the rear side of the horizontal portion 26a, mud retention on the inclined surface 26b is suppressed, and the leveling float 11 swings up and down around the rear fulcrum. Even if it moves, the inclined surface 26b portion does not sink deeply into the field surface, and mud pushing is also less.

Next, an inclined connecting surface formed between the center-side mud intake recess 23 and the side mud intake recess 24 and the bottom surface 26 will be described.
As shown in FIGS. 6, 13, and 14, a second inclined connecting surface 23 </ b> C along the lateral width direction is formed at the boundary portion between the narrow width portion 23 </ b> B and the second leveling flat portion 26 </ b> B of the central mud intake recess 23. Has been. The second inclined connecting surface 23 </ b> C is formed on an inclined surface that is gentler than the escape gradient of the mold used when the leveling float 11 is blow-molded.

Since the second inclined connecting surface 23C is a gently inclined surface, the trace of the boundary surface between the narrow-side portion 23B of the center-side mud intake recess 23 and the second leveling flat portion 26B is difficult to adhere to the farm surface. It has become. For example, when the boundary surface between the narrow-side portion 23B of the center-side mud intake recess 23 and the second leveling flat portion 26B is formed at an angle close to a right angle, the narrow-width portion of the center-side mud intake recess 23 A large level difference is formed between 23B and the second leveling flat part 26B, and the level difference is formed on the field surface and remains as a level difference, which degrades the quality of planting work.
Accordingly, in the present invention, such a step trace is unlikely to remain.

A first inclined connecting surface 27C along the lateral width direction is formed on the boundary surface between the mud escape recessed portion 27A, the first leveling flat portion 26A, and the third leveling flat portion 26C. As shown in FIGS. 5 and 6, the first inclined connecting surface 27 </ b> C is formed on an inclined surface that is gentler than the escape gradient of the mold used when the leveling float 11 is blow-molded.
As a result, the traces of steps are unlikely to remain, and the unevenness of the planting surface is leveled, so that the planting posture of the seedling is not disturbed, the planting depth is stabilized, and the growth of the seedling is improved.

  Next, as shown in FIGS. 6 and 11, a third slope along the front-rear direction is formed at the boundary portion between the rear end portion of the narrow-width portion 23B of the center-side mud intake recess 23 and the fourth leveling flat portion 26D. A connecting surface 23D is formed. The third inclined connecting surface 23 </ b> D is formed on an inclined surface that is gentler than the escape angle of the mold used when the leveling float 11 is blow-molded.

  With such a configuration, it is possible to prevent the muddy soil that has reached the front end of the front overhanging portion 13 from being taken into the center side mud intake recessed portion 23 and flowing to the lateral side of the front overhanging portion 13. The muddy soil taken into the center-side taking-in recessed portion 23 can flow more smoothly from the third inclined connecting surface 23D to the fourth leveling flat portion 26D side. If the third inclined connecting surface 23D has a stepped shape with a large degree of inclination, there is a drawback that mud stays at the stepped portion, but the retention makes the inclination of the third inclined connecting surface 23D moderate. This is solved.

As shown in FIGS. 13 and 14, inclined surfaces 12 b are formed along the left-right direction on the bottom surfaces of the left and right end portions 12 a of the float main body 12. The inclined surface 12 b is formed in an inclined posture that is closer to the upper surface as it is closer to the lateral end of the float body 12.
In this way, by forming the upward inclined surface 12b on the bottom surface of the lateral end of the float main body 12 (leveling float 11), the sinking of the lateral end portion of the leveling float 11 into the field surface is suppressed, and It is possible to reduce mud extrusion to the side.

  As shown in FIG. 6 and FIG. 7, a curved shape surrounding the side-side mud intake recess 24 is formed at the lateral end side portion further than the formation position of the side-side mud intake recess 24 in the float main body 12. One leveling flat part 26A is formed in a continuous state. Behind the first leveling flat part 26A, the horizontal part 26a is formed in a continuous state, and forms a part of the third leveling flat part 26C.

[Zone-shaped leveling section]
A strip leveling portion A is formed at the rear end of the float main body 12. As shown in FIG. 6, the strip-shaped leveling portion A is a surface that exhibits a strip shape along the lateral width direction over the entire length or substantially the entire length of the bottom surface of the rear end portion of the float main body 12. The belt-shaped leveling portion A includes a fourth leveling flat portion 26D formed at the rear end portion of the center-side mud intake recess portion 23 and a first recess portion 27A formed on both lateral sides of the center-side mud intake recess portion 23. A plane 27c formed at the rear end of the second recessed portion 27B adjacent to the front and rear inclined surface 27a and the first recessed portion 27A formed at the rear end, and a lateral direction adjacent to the lateral side of the plane 27c A first inclined connecting surface 27C which is inclined along the horizontal plane, and a horizontal flat third leveling portion 26C which is formed at the rear end of the side-side mud intake concave portion 24 which is located further laterally than the concave portion 27. Composed. The third leveling flat portion 26 </ b> C is formed in a state from the side-side intake recessed portion 24 to the lateral side end portion of the float main body portion 12.

  As shown in FIGS. 5 and 6, among those constituting the belt-shaped leveling portion A, the fourth leveling flat portion 26 </ b> D located behind the center-side mud intake recess 23 and the side-side mud intake recess A third leveling flat portion 26 </ b> C formed at the rear end of 24 is formed on a flat surface that protrudes downward most. On the other hand, the inclined surface 27a and the flat surface 27c forming the recessed portion 27, which are sandwiched between the third leveling flat portion 26C and the fourth leveling flat portion 26D, are located slightly above and have the same height as the flange portion 11a. Is in position.

The third leveling flat portion 26C is located at the lowest position and forms a horizontal plane in the region including the front side overhang portion 13 and the portion of the float main body portion 12 located behind the front side overhang portion 13. Yes, it has a high leveling function.
4th leveling flat part 26D is located in the lowest part and forms a horizontal surface in the area | region containing the part located in the back of the front side overhang | projection part 13 in the back side overhang | projection part 14 and the float main body part 12. FIG. Yes, it has a high leveling function.

  The meaning of the presence of the recessed portion 27 formed between the center side mud intake recessed portion 23 and the side side mud intake recessed portion 24 is that the strip leveling portion A is on the same plane over the entire length of the planting width. If there is, it is considered that the leveling function can be greatly improved, but in that case, it is easy for mud accumulation and mud pushing to occur in the belt leveling part A, and the function of improving the leveling function and avoiding mud pushing etc. Does not satisfy.

  Therefore, the muddy soil flowing to the front end of the float main body 12 in which the recessed portion 27 is formed along the lateral side edge of the front overhanging portion 13 that protrudes forward is provided to the float main body 12. Rather than catching at the front end, by guiding backward through the recessed portion 27, mud pools are avoided, and the muddy soil is prevented from flowing out to the lateral side of the float main body 12.

As shown in FIGS. 3 to 6, the left and right rear projecting portions 14 are provided with mounting seats 14 </ b> A having mounting holes and the like so as to fix and fix the rear bracket 20 that forms the rear fulcrum a of the leveling float 11. It is formed. The mounting seat 14A is formed with a through hole 14a provided on the surface of the left and right overhanging portion 14 and a mounting hole 14b that is largely recessed upward on the bottom surface side.
This mounting hole 14b is formed in a shape that is largely recessed above the flat surface 27c of the mud escape recess 27B formed in the belt-shaped leveling portion A. Thus, only the function as a fulcrum is exhibited, and the mounting hole 14b does not disturb the ground leveling by the belt-shaped leveling part A.

  The belt-shaped leveling part A of the leveling float 11 is located in front of the seedling planting mechanism 10. Thereby, the leveling function with respect to the planting surface is sufficiently performed by the belt-shaped leveling part A, and there is no floating seedling or the like, and the posture of the planting seedling is maintained without falling down.

  The strip-shaped leveling part A is also formed in the rear part of the front overhanging part 13 located at the center of the planting width, and the marker marks applied to the farm surface in the previous step can be leveled.

[Another embodiment]
(1) Although the pair of left and right mud relief portions 27B are formed in the belt-shaped leveling portion A, the number, shape, width, etc. of the mud relief portions 27B can be arbitrarily provided.
Further, the position to be provided is not limited to the lateral side of the front overhanging portion 13.

(2) In the said embodiment, although the form which comprises the planting strip covering all the strips with the single leveling float 11 was described, when this invention comprises a plurality of leveling floats 11, it is 3 or more. It can also be applied to leveling floats with a width across the planting strip.

(3) As the form of the leveling float 11, the float main body 12 is integrally formed with the front overhanging portion 13 and the rear overhanging portion 14, but one of the front overhanging portion 13 and the rear overhanging portion 14 is omitted. It may be formed of.

  The present invention can be applied to paddy field work machines such as walking type rice transplanters, direct seeding machines, and grass transplanting machines in addition to riding type rice transplanters.

DESCRIPTION OF SYMBOLS 11 Leveling float 12a Side edge part 21 Vertical wall 23 Center side mud intake recessed part 23C 2nd inclination connection surface 23D 3rd inclination connection surface 24 Side side mud intake recessed part 24D 4th inclination connection surface 26A 1st leveling flat part 26B 2nd Leveling flat part 26C 3rd leveling flat part 27A 1st recessed part (mud escape recessed part)
27C 1st inclined connecting surface A Belt-shaped leveling part L Width

Claims (6)

Providing a leveling float having a lateral width corresponding to three or more, forming a belt-like leveling portion that exhibits a belt-like shape along the lateral width direction over the entire lateral width or substantially the entire length of the bottom surface of the leveling float;
A position deviated to the side direction from the center position in the lateral direction of the strip ground leveling unit, and mud relief recesses are recessed upward in order to induce the mud backwards, laterally outside the side of the mud relief recess Forming a first leveling flat portion projecting downward from the mud escape recessed portion, and forming a first inclined connecting surface inclined in the left-right direction at a boundary portion between the mud escape recessed portion and the first leveling flat portion. ,
A center side mud uptake recess for taking mud soil from the front end of the bottom surface at the lateral center portion of the bottom surface of the ground leveling float toward the rear, the center side located behind the mud uptake recess the center side mud uptake recess Forming a fourth leveling flat part projecting further downward, and a boundary surface between the center side mud intake recess and the second leveling flat part adjacent to the left and right sides and projecting downward from the center mud intake recess And forming a second inclined connecting surface inclined in the left-right direction ,
The paddy field work machine configured such that the mud escape recess is present between the second ground flat portion adjacent to the left and right lateral sides of the central mud intake recess and the first leveling flat portion. Leveling float structure.   The leveling float structure of the paddy field machine according to claim 1, wherein a side-side mud taking-in recessed portion for taking in mud is formed in a portion of the bottom surface of the leveling float that smoothes the propulsion wheel marks. Said central side mud uptake recess, before SL at the boundary portion between the fourth ground leveling flat portion, the third is formed with inclined connecting surface according to claim 1 or 2, wherein the paddy working machine tilts obliquely in longitudinal direction leveling Float structure. In the front-rear direction, at the boundary portion between the side mud uptake recessed portion and the third leveling flat portion located behind the side mud uptake recessed portion and protruding downward from the side mud uptake recessed portion. leveling floating structure paddy working machine according to any one of claims 1 to 3 is formed a fourth inclined connecting surface that tilts obliquely.   The end surface of the leveling float side end is formed on a deviated surface that deviates toward the left and right center side of the leveling float toward the front-rear facing surface along the propulsion direction or the rear end side of the end surface. The leveling float structure of the paddy field machine as described in any one of them.   The vertical wall which protrudes upwards from the upper surface of the said leveling float is formed in the part located in the front end of the said leveling float, and the back of the wheel which levels a propulsion wheel trace among Claims 1-5 The leveling float structure of the paddy field machine as described in any one of these.

Images