JP2019154443A5 - - Google Patents

Description

Paddy field machine

  The present invention relates to a paddy field work machine such as a riding type rice transplanter or a riding type direct sowing machine that supplies agricultural powders such as fertilizers, chemicals, and seeds to a rice field.

  In a riding type rice transplanter that is an example of a paddy field work machine, as disclosed in Patent Document 1, a storage unit (13 in FIG. 1 of Patent Document 1) that stores fertilizer (corresponding to a granular material), a storage unit 1 is provided with a feeding part (14 in FIG. 1 of Patent Document 1) for feeding the powder and a float (25 in FIGS. 1, 5 and 6 of Patent Document 1). 6 and 38), a supply pipe (24 in FIGS. 1, 5 and 6 of Patent Document 1) is connected across the feeding portion and the groove forming portion.

  As a result, the aircraft advances while the float is in contact with the rice field, and as the aircraft progresses, grooves are formed in the rice field by the groove forming unit, and the granular material fed from the feeding unit passes through the supply pipe. Then, it reaches the groove forming portion and is supplied to the groove by the groove forming portion from the outlet located at the lower portion of the supply pipe.

JP 2011-234664 A

  According to Patent Document 1, in the side view, the supply pipe is connected to the groove forming portion in a slanting posture obliquely rearward and downward from the payout portion, so that the granular material drawn from the payout portion is the inner surface (bottom surface) of the supply pipe. Is in a state of sliding down, and is in a state of being discharged from the outlet of the supply pipe to the groove portion by the groove forming portion.

As a result, even if a large number of granular materials are fed out from the feeding portion, the massive granular material is dispersed in the longitudinal direction of the supply pipe due to contact between the powder and the inner surface (bottom surface) of the supply pipe. When the dispersed granular material comes out from the outlet of the supply pipe, the granular material may be dispersed from the outlet of the supply pipe, resulting in a granular material that is not supplied to the groove by the groove forming portion.
An object of this invention is to be comprised so that a granular material can be appropriately supplied to the groove | channel by a groove production part in a paddy field machine.

The paddy field machine of the present invention includes a storage unit for storing powder and a feeding unit that feeds the powder from the storage unit, and the powder that has been fed by the feeding unit is produced from a supply pipe. The groove portion is configured to be supplied to the groove formed on the surface by the groove portion, and the groove forming portion extends rearward from the right portion of the rear portion of the groove forming body, and the groove forming body that enters the surface of the groove to form a groove. A right wall portion and a left wall portion extending rearward from the left portion of the rear portion of the groove forming body, and the outlets of the granular material located at the lower portion of the supply pipe are the right and left walls. Located between the parts.
In the above configuration, it is preferable that a supply path is connected across the feeding portion and the upper portion of the supply pipe.
In the above configuration, it is preferable that the supply pipe is a straight pipe whose internal cross-sectional area does not change from the upper part to the lower part.
In the above configuration, at the outlet of the granular material located at the lower part of the supply pipe, the area of the surface along the outer periphery of the outlet is based on the cross-sectional area inside the supply pipe at a plane parallel to the bottom of the float. It is preferable that the shape of the outer peripheral portion of the outlet is set so as to be a large value.
The said structure WHEREIN: It is suitable when the shape of the outer peripheral part of the said outlet is set so that the rear part of the outer peripheral part of the said outlet may be located below rather than the front part of the outer peripheral part of the said outlet.
The said structure WHEREIN: It is suitable when the shape of the outer peripheral part of the said outlet is set so that the front part of the outer peripheral part of the said outlet may be located below rather than the rear part of the outer peripheral part of the said outlet.
The said structure WHEREIN: It is suitable if the granular material supply apparatus which supplies the said granular material is a chemical | medical agent supply apparatus, and the supply path of the said chemical | medical agent supply apparatus and the supply path of a fertilizer application have not mutually joined.
The said structure WHEREIN: It is suitable when the granular material supply apparatus which supplies the said granular material is a chemical | medical agent supply apparatus, and the said groove forming part is located ahead of the drawing | feeding-out part of the said chemical | medical agent supply apparatus by side view.
The said structure WHEREIN: The granular material supply apparatus which supplies the said granular material is a chemical | medical agent supply apparatus, and the groove formation part of the said groove formation part and a fertilizer is a rear end of a soil covering member in the side view in the side view It is preferable that it is located between.

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 vertical side view of the vicinity of the groove forming device, connecting portion, and supply pipe of the first groove forming portion in the first alternative embodiment of the invention. It is a vertical side view of the vicinity of the groove forming device, the connection portion, and the supply pipe of the first groove forming portion in the second alternative embodiment of the invention.

  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 FIGS. 2 and 3, in the fertilizer applicator 6, six feeding parts 26 (corresponding to feeding parts) are connected to the horizontal frame 12 at a predetermined interval to store fertilizer (corresponding to powder particles). Two hoppers 27 (corresponding to storage parts) are provided, and the hoppers 27 are connected over the upper part of the three feeding parts 26.

  As shown in FIGS. 2, 3, and 5, the groove plate 28 and the soil covering member 31 are connected to the float 16, and the groove forming device 29 is connected to the groove cutting plate 28. A hose 30 (corresponding to a supply path) is connected over the two.

  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 feeding parts) are connected to the horizontal frame 12 at a predetermined interval, and a medicine (corresponding to a granular material) is supplied. Three hoppers 33 (corresponding to storage parts) for storage are provided, and the hoppers 33 are connected to the upper part of the two feeding parts 32. As shown in FIGS. 2, 4, and 5, a groove plate 34 (corresponding to a groove forming body) and a soil covering member 37 are connected to the float 16, and a groove generator 35 is connected to the groove plate 34. A hose 36 (corresponding to a supply path) is connected across the 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 groove generator 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 right wall portion), and a left wall. A portion 35c (corresponding to the left wall portion) is provided. The lower end portion 35d of the right and left wall portions 35b, 35c of the groove forming device 35 is positioned 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 is attached to the connecting portion 56.
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 (the first groove portion 41), the groove forming device 35 is extended 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 50b of the bracket 50, inserting the bolt 52 into the connecting holes 37a and 37b of the soil covering member 37, and tightening the nut 50d 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 rearward from the horizontal axis P2, so that the float 16 is lowered forward. 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 grooving device 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, and a left wall portion 29 c, A front wall portion 29 a of the grooving device 29 is connected to a rear portion of the grooving 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, a supply pipe 54b, and a connecting pipe 54c that are attached to the upper portion of the groove forming device 29, 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], as shown in FIG. 11, the outlet 46a of the supply pipe 46 is formed in a slanted front-down shape, and the front portion 46c of the outer peripheral portion of the outlet 46a of the supply pipe 46 is formed. The supply pipe 46 may be configured to be positioned below the rear portion 46b of the outer peripheral portion of the outlet 46a.

  As a result, as shown in FIG. 11, the cross section inside the supply pipe 46 in a plane parallel to the bottom surface 16c of the float 16 is circular, whereas the outlet 46a of the supply pipe 46 is an ellipse with a downward-falling shape. The area of the surface along the outer periphery of the outlet of the supply pipe (an oblique surface with a downward slope) is the cross-sectional area inside the supply pipe in a plane parallel to the bottom surface of the float Is equivalent to a state where the value is also large).

[Second Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention], as shown in FIG. 12, the outlet 46a of the supply pipe 46 is formed in a convex shape in a side view, and the front portion of the outer peripheral portion of the outlet 46a of the supply pipe 46 is formed. You may comprise so that 46c and the rear part 46b may be located below the center part of the outer peripheral part of the outlet 46a of the supply pipe 46. FIG.

[Third Another Embodiment of the Invention]
The configuration of the outlet 46a of the supply pipe 46 and the groove forming device 35 described in the above-mentioned [Mode for Carrying Out the Invention] [First Another Mode for Carrying Out the Invention] and [Second Another Mode for Carrying Out the Invention] are connected. The present invention may be applied to the outlet 54d of the supply pipe 54b of the section 54 and the groove generator 29.

  The present invention can be applied not only to a riding type direct sowing machine, but also to a riding type rice transplanter that supplies agricultural particles such as fertilizers, chemicals, and seeds to a rice field.

16 Float 16c Float bottom 26, 32 Feeding part 27, 33 Storage part 30, 36 Supply path 34 Groove forming body 35b Right wall part 35c Left wall part 41, 42 Groove part 46, 54b Supply pipe 46a Supply pipe outlet 46b Supply Rear portion of the outer peripheral portion of the outlet of the pipe 46c Front portion of the outer peripheral portion of the outlet of the supply pipe

Claims (9)

A storage unit for storing the granular material, and a feeding unit for feeding the granular material from the storage unit,
The granular material fed out by the feed-out part is configured to be supplied from the supply pipe to the groove formed on the surface by the groove forming part,
A groove forming body in which the groove forming portion enters the surface to form a groove; a right wall portion extending rearward from a right portion of the rear portion of the groove forming body; and a rear portion from a left portion of the rear portion of the groove forming body. And a left wall extending to
The paddy field work machine in which the exit of the granular material located in the lower part of the supply pipe is located between the right and left wall parts.   The paddy field machine according to claim 1, wherein a supply path is connected across the feeding portion and the upper portion of the supply pipe.   The paddy field work machine according to claim 1 or 2, wherein the supply pipe is a straight pipe whose internal cross-sectional area does not change from the upper part to the lower part.   At the outlet of the granular material located at the lower part of the supply pipe, the area of the surface along the outer periphery of the outlet is larger than the cross-sectional area inside the supply pipe at a plane parallel to the bottom of the float. The paddy field work machine according to claim 3, wherein the shape of the outer peripheral portion of the outlet is set.   The paddy field work machine according to claim 4, wherein the shape of the outer peripheral portion of the outlet is set so that the rear portion of the outer peripheral portion of the outlet is located below the front portion of the outer peripheral portion of the outlet.   The paddy field work machine according to claim 4, wherein the shape of the outer peripheral portion of the outlet is set so that the front portion of the outer peripheral portion of the outlet is located below the rear portion of the outer peripheral portion of the outlet. The granular material supply apparatus which supplies the said granular material is a chemical | medical agent supply apparatus, The supply path of the said chemical | medical agent supply apparatus and the supply path of a fertilizer application apparatus do not merge mutually. The paddy field machine described. The granular material supply apparatus which supplies the said granular material is a chemical | medical agent supply apparatus, The said groove formation part is located ahead of the drawing | feeding-out part of the said chemical | medical agent supply apparatus in side view. Paddy field work machine as described in. The granular material supply device for supplying the granular material is a drug supply device, and in side view, the groove forming portion and the groove forming portion of the fertilizer application device are between the front end of the groove forming body and the rear end of the soil covering member. The paddy field work machine according to any one of claims 1 to 7.