JP3775957B2 - Grooving blade for farm - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a self-propelled grooving machine that performs grooving in a paddy field or the like, and more particularly to a grooving blade of a self-propelled grooving machine.
[0002]
[Prior art]
In paddy fields, grooves are formed on the soil surface to optimize drainage. FIG. 7 shows the cross-sectional shape of the groove 40 made of a conventional cultivating board in the paddy field 43. The groove 40 opens to the soil surface 44, and has a left and right side surface 41 and a bottom surface 42 that extends between the lower ends of the left and right side surfaces 41. Along with the formation of the groove 40, the soil that existed before the formation of the groove 40 is discharged to a portion of the soil surface 44 near the upper end of the groove 40, and a raised portion 45 is formed here.
[0003]
The raised portion 45 becomes a cause of hindering drainage from the soil surface 44 to the groove 40, and at the time of using the combine, it causes damage to the combine blade, and the raised portion 45 is preferably removed.
[0004]
For this reason, in the self-propelled grooving machine of Japanese Utility Model Publication No. 55-147107, a small blade is attached to the side surface of the grooving blade body, and the soil surface is leveled by this blade.
[0005]
[Problems to be solved by the invention]
Problems of the grooving blade of the self-propelled grooving machine disclosed in Japanese Utility Model Laid-Open No. 55-147107 are as follows.
(A) Since the blade plate is fixed to the side surface of the grooving blade body by welding or the like, the manufacturing becomes complicated and the blade plate is easily detached.
(B) The size of the blade plate in the longitudinal direction is smaller than the size of the groove cutting blade body. When making a shallow groove, the lower end of the blade plate does not reach the soil surface, and when making a very deep groove, The board will be buried in the soil, making it useless.
[0006]
An object of the present invention is to provide a grooving blade for a field that overcomes the above-mentioned problems.
[0007]
Japanese Utility Model Publication No. 3-27361 discloses a field grooving blade in which a flange is formed at the upper end of the grooving blade body. However, this flange has a very small overhanging dimension, and the role of suppressing the formation of the raised portion by pressing the soil discharged from the soil with the formation of the groove when the groove cutting blade advances from the top. Do not have.
[0008]
[Means for Solving the Problems]
According to the field groove cutting blade (24) of the present invention, the groove forming part (25, 27) is provided, and the groove forming part (25, 27) is partially buried in the ground of the field (43). The groove (40) corresponding to the cross-sectional contour of the groove forming portion (25, 27) is formed while being advanced. In the groove cutting blade (24) for the field, the overhanging portion (26) is discharged to the ground surface on both sides of the groove (40) as the groove (40) is formed by the groove forming portion (25, 27). While spreading the soil outward in the left-right direction, pressing from above, overhanging from the upper end of the groove forming portion (25, 27) outward in the left-right direction so as to suppress the formation of the raised portion (45), and It is formed by integral molding with the groove forming portions (25, 27).
[0009]
The field grooving blade (24) has the same shape and structure, and is also called a cultivating blade. The field is, for example, a paddy field. The grooving blade (24) is mounted on, for example, a single-wheeled self-propelled vehicle (10), and the self-propelled vehicle of the single-wheeled self-propelled vehicle (10) advances in the soil at the buried portion, A groove (40) is formed in the groove. The operator presses the handle (16) of the single-wheeled self-propelled vehicle (10) from above so that the groove cutting blade (24) is maintained at a predetermined depth in the soil. During the advancement of the groove cutting blade (24), a force for constantly pressing the soil surface (44) is applied.
[0010]
As the grooving blade (24) advances in the soil and the groove (40) is formed in the soil, the soil is discharged to the soil surface (44) and the soil surface in the vicinity of the groove (40) ( At 44), an attempt is made to form a raised portion (45). Since the overhang part (26) presses the soil discharged from the groove (40) to the soil surface (44) with an appropriate force, the formation of the raised part (45) is suppressed.
[0011]
Since the overhang portion (26) extends in the front-rear direction over the entire range from the front end to the rear end of the groove forming portion (25, 27), regardless of the depth of the groove (40) to be made, the soil surface (44) , The soil surface (44) is pressed, and the formation of the raised portion (45) on the soil surface (44) can be suppressed. Further, since the overhang portion (26) is formed integrally with the groove forming portion (25, 27), the strength can be increased and the manufacture can be facilitated.
[0012]
According to the field grooving blade (24) of the present invention, the overhang portion (26) spreads at an inclination angle at which the tip end side in the overhang direction is lower than the base end side in the overhang direction.
[0013]
Take the vertical cross section of the groove cutting blade (24) with respect to the attitude angle of the groove cutting blade (24) during the formation of the groove (40), and the overhanging portion (26) downwards with respect to the horizontal direction in the vertical cross section When the inclination angle is defined as θa, preferably, for example, 0 ° <θa ≦ 10 °.
[0014]
The soil discharged from the groove (40) is likely to be piled up higher as it is closer to the groove (40), and the amount of piled up in the width direction of the groove (40) is uneven. Due to the downward inclination angle θa of the overhang portion (26), the overhang portion (26) appropriately diffuses the soil discharged from the groove (40) to the soil surface (44) outward in the width direction of the groove (40). In addition, since the soil is pressed from above, the rising amount of the soil is equalized in the horizontal direction, and the peak height of the rising portion (45) can be reduced.
[0015]
According to the field groove cutting blade (24) of the present invention, the soil diffusion preventing portion (28) protruding outward from the tip of the overhang portion (26) is formed by integral molding with the overhang portion (26), It is inclined downward toward the outside with respect to the surface of the overhang portion (26).
[0016]
The downward inclination angle θb of the surface of the soil diffusion preventing portion (28) with respect to the surface of the overhang portion (26) is, for example, 40 ° ≦ θb ≦ 50 °.
[0017]
The overhang portion (26) smoothes the rise of the soil surface (44) while diffusing the soil discharged from the groove (40) to the soil surface (44) outward in the width direction of the groove (40). If only the overhanging part (26) is present, the soil diffused outward in the width direction of the groove (40) by the overhanging part (26) accumulates at a position slightly beyond the tip of the overhanging part (26). It is easy to form a new raised portion (45) there. The soil diffusion preventing portion (28) is formed on the tip side of the overhang portion (26), and is inclined outward at a steep angle further from the surface of the overhang portion (26), thereby the overhang portion (26). The soil diffused in the width direction of the groove (40) is prevented from further diffusion by the soil diffusion prevention part (28) and is placed under the overhang part (26) and the soil diffusion prevention part (28). The soil diffusion preventing portion (28) by the soil diffused by the overhanging portion (26) is retained and is pressed from above by the overhanging portion (26) and the soil diffusion preventing portion (28). It is possible to prevent the formation of a new raised portion (45) slightly outside the tip of).
[0018]
According to the field groove cutting blade (24) of the present invention, the groove forming portion (25, 27) includes the side surface forming portion (25) for forming the left and right side surfaces of the groove (40) and the bottom surface of the groove (40). The bottom surface forming portion (27) is inclined so that the bottom surface contour of the groove (40) has a deepest valley shape at the center in the left-right direction. .
[0019]
In the center of the bottom surface of the groove (40), there is a strong tendency for sediment to accumulate due to sedimentation of the soil, and the depth to quickly become shallow. By forming the bottom surface contour of the groove cutting blade (24) in a valley shape by the groove (40), the center of the bottom surface of the groove (40) can be deepened to cope with the reduction of the depth of the groove (40).
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an overall schematic view of a self-propelled grooving machine 10. The transmission shaft pipe 11 extends in the front-rear direction, and the engine 12 and the speed reducer 13 are attached to the rear end portion and the front end portion of the transmission shaft pipe 11, respectively. The rotational power of the engine 12 is transmitted to the speed reducer 13 via a transmission shaft (not shown) in the transmission shaft pipe 11. The handle 16 has a proximal end fixed to an intermediate portion of the transmission shaft pipe 11 and extends rearwardly above the engine 12. The throttle lever 17 is attached to the right side portion of the handle 16 and adjusts the throttle opening of the engine 12, that is, the output of the engine 12. The wheel 18 is integrally coupled to the output shaft of the speed reducer 13 in the rotational direction, and is rotationally driven by the rotational power from the engine 12 that is decelerated and transmitted via the speed reducer 13. The leaflet plate 19 is fixed to the case of the speed reducer 13 so as to cover the front and side of the front upper half of the wheel 18. The stay 21 is fixed to the transmission shaft pipe 11 and extends obliquely rearward in the vicinity of the coupling position of the base end portion of the throttle lever 17 to the transmission shaft pipe 11. The culture plate 24 is fixed to the stay 21 at a predetermined angle.
[0021]
FIG. 2 is a side view of the working state of the self-propelled grooving machine 10 in the paddy field 43. The soil culture plate 24 is fixed at a predetermined angle to the lower end of the stay 21 via the center plate 31 at an inclination angle such that the front end side is higher than the rear end side, and the front portion is exposed from the soil surface 44 while the rear portion Is buried in the ground below the soil surface 44. Even while the self-propelled grooving machine 10 is moving forward, the operator pushes down the handle 16 while holding the protruding end of the handle 16, and this push-down force is used as the pressing force of the soil plate 24 against the soil surface 44. Thus, the bottom plate portion 27 at the rear end portion of the soil culturing plate 24 is held at a predetermined depth.
[0022]
3, 4, and 5 are views of the cultivating plate 24 as viewed from above, the right side surface, and the rear end side, respectively. The cultivating plate 24 has a left-right symmetric structure in an arbitrary cross section, and the left and right side plate portions 25 for forming the side surface 41 of the groove 40 (FIG. 7), outward in the left-right direction from the upper ends of the side plate portions 25. The base end side is coupled to the left and right overhanging plate portions 26 to be extended, the left and right bottom plate portions 27 for forming the bottom surface 42 of the groove 40 disposed at the rear end portion of the culture plate 24, and the leading edge of the overhanging plate portion 26. It has a protruding edge portion 28 that protrudes a little further outward in the left-right direction. The side plate portion 25, the overhang plate portion 26, the bottom plate portion 27, and the protruding edge portion 28 are made of a single flat metal plate (for example, a metal such as aluminum or stainless steel), and constitute the main body of the culture plate 24. . The bottom plate portion 27 is provided only at the rear end portion of the culture plate 24, and in the position where the bottom plate portion 27 does not exist in the front-rear direction of the culture plate 24, the left and right side plate portions 25 are joined in the vertical direction by joining the lower end portions to each other. A flat strip joint 33 is formed to hang down. As can be seen from FIG. 4, the distance from the upper surface of the cultivating plate 24, that is, the distance from the overhanging plate portion 26 to the joint portion 33 increases in the rearward direction of the cultivating plate 24. The connecting portion 30 connects the left and right overhanging plate portions 26 at the front end portion of the soil culturing plate 24, and maintains the left-right spacing between the left and right overhanging plate portions 26 at the front-rear direction position. The center plate 31 has a lower end fixed to the central portion in the left-right direction of the connecting portion 30 and extends upward. When the earth plate 24 is coupled to the stay 21 (FIG. 2), the center plate 31 is applied to the lower end of the stay 21 and a bolt ( It is fixed to the stay 21 so as to be separable and the angle can be selected. The gap 29 is formed between the left and right bottom plate portions 27, and the turnbuckle 32 is disposed at a position overlapping the gap 29 in the front-rear direction of the culture plate 24, and connects the left and right overhang plate portions 26 to each other. The length can be adjusted by a person, and the dimension of the gap 29, that is, the distance between the left and right projecting plate portions 26 at the position of the turnbuckle 32 in the front-rear direction is adjusted according to the length.
[0023]
FIG. 6 is a cross-sectional view of the soil culturing plate 24 at the position of the joint portion 33 in the front-rear direction. In FIG. 6, each symbol is defined as follows in the cross section of the soil culturing plate 24.
C: Dimensions of the overhang plate portion 26.
E: Dimensions of the side plate portion 25.
F: The dimension of the protruding edge portion 28.
G: Dimensions of the bottom plate portion 27.
θa: The downward angle of the overhanging plate portion 26 with respect to the left and right horizontal line (the left and right horizontal line is defined as a straight line perpendicular to the cross section of the earth plate 24, that is, the left-right symmetry line of the cross section of FIG. 6).
θb: downward angle of the protruding edge portion 28 with respect to the overhanging plate portion 26.
θc: downward angle of the bottom plate portion 27 with respect to the horizontal line on the left and right.
[0024]
Examples of preferable representative values or ranges of the numerical values of the respective symbols are as follows.
C = 54 mm, E = 138 mm, F = 6 mm, 0 ° <θa ≦ 10 ° (preferably θa = 5 °), 40 ° ≦ θb ≦ 50 ° (preferably θb = 45 °), 0 ° <θc ≦ 10 ° (preferably θc = 5 °).
[0025]
The action of the cultivating board 24 will be described. As shown in FIG. 2, the culture plate 24 is attached to the lower end portion of the rear portion of the stay 21 at the center plate 31 at a predetermined inclination angle such that the front end of the overhang plate portion 26 is higher than the rear end. The operator pushes the handle 16 downward with a predetermined operating force while moving the self-propelled grooving machine 10 forward, and thereafter causes the bottom plate portion 27 of the cultivating plate 24 to reach a predetermined depth, While maintaining, the self-propelled grooving machine 10 is advanced. As the cultivating plate 24 advances in the ground, the soil in front of the cultivating plate 24 is scraped to the left and right and discharged onto the soil surface 44, and a groove 40 is formed behind the cultivating plate 24. The groove 40 has a valley-shaped bottom contour whose deepest central portion in the left-right direction is due to the inclination of θc of the bottom plate portion 27. On the other hand, the overhanging plate portion 26 smoothly spreads the soil pushed up on the soil surface 44 near the upper end of the groove 40 outwardly to the left and right by the inclination of θa, and equalizes the amount of soil rise in the left-right direction. The protruding edge portion 28 receives the soil diffused outwardly from the left and right by the overhanging plate portion 26 by the inclination of θb, and thereby diffuses beyond the tip of the protruding edge portion 28, and spreads to the tip of the protruding edge portion 28. Prevent accumulation. Thus, the soil discharged onto the soil surface 44 is pressed by the overhanging plate portion 26 and the protruding edge portion 28, and the formation of the raised portion 45 (FIG. 7) is prevented.
[Brief description of the drawings]
FIG. 1 is an overall schematic view of a self-propelled grooving machine.
FIG. 2 is a side view of a working state of a self-propelled grooving machine in paddy fields.
FIG. 3 is a view of a cultivating plate as viewed from above.
FIG. 4 is a view of the cultivating board as viewed from the right side.
FIG. 5 is a view of the cultivating plate as viewed from the rear end side.
FIG. 6 is a cross-sectional view of the soil culturing plate at the position of the joint portion in the front-rear direction.
FIG. 7 is a diagram showing a cross-sectional shape of a groove made of a conventional cultivating board in a paddy field.
[Explanation of symbols]
10 Self-propelled grooving machine (single-wheel self-propelled vehicle)
16 Handle 24 Soil plate (field groove, groove cutting blade)
25 Side plate part (groove forming part, side surface forming part)
26 Overhang plate part (overhang part)
27 Bottom plate part (groove forming part, bottom surface forming part)
28 Protruding edge (soil diffusion prevention part)
40 Groove 43 Paddy field (field)
44 Soil surface 45 Swelling part

Claims (3)

The groove forming portion (25, 27) is provided, and the groove forming portion (25, 27) is advanced while being partially buried in the ground of the farm field (43). In the field groove cutting blade (24) adapted to form the groove (40) corresponding to the cross-sectional profile, the overhanging portion (26) is formed by the groove forming portion (25, 27). In order to suppress the formation of the swelled portion (45) while diffusing the soil discharged to the surface portions on both sides of the groove (40) in the right and left direction while pressing from above, the groove forming portion upper end Te overhanging the lateral direction outward from the (25, 27), and wherein is formed by integrally molding the groove forming portion (25, 27), out of the tip of the overhang (26) Soil diffusion prevention part (28) projecting in the direction is integrated with the projecting part (26) Ri is formed, that is inclined downwardly toward the outside with respect to the plane of the order to prevent the volume outside the diffusion to have soil soil diffusion preventing portion (28), said overhang (26) A grooving blade for farms characterized by this.   The field grooving blade according to claim 1, wherein the projecting portion (26) extends at an inclination angle such that a distal end side in the projecting direction is lower than a proximal end side in the projecting direction. The groove forming portion (25, 27) includes a side surface forming portion (25) for forming the left and right side surfaces of the groove (40) and a bottom surface forming portion (27) for forming the bottom surface of the groove (40). wherein the bottom surface forming portion (27), the bottom contour of the groove (40), such that a valley-shaped to be deepest in the left-right direction center portion, and being inclined according to claim 1 or 2 The grooving blade for fields described in 1.

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