JP2001178202A - Furrow-opening blade for field - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the formation of banks 45 on the surfaces of the ground near the upper ends of a furrow 40 with the ridging plate 24 of a self-traveling furrow opener 10 for forming the furrow 40 in a paddy field 43. SOLUTION: In the ridging plate 24, projected plate portions 26 are laterally outward projected from the upper ends of side plate portions 25 in a prescribed length. The side plate portions 25 and the projected plate portions 26 are integrally molded together with a bottom plate portion 27 from a flat metal plate. When a furrow 40 is formed, soil discharged on the surface of the ground is laterally outward scattered and simultaneously pressed with the projected portions 26 to control the formation of the banks 45.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a self-propelled grooving machine for performing grooving in a field such as a paddy field, and more particularly to a grooving blade of a self-propelled grooving machine.

[0002]

2. Description of the Related Art In a paddy field, a groove is formed on the soil surface in order to optimize drainage. FIG. 7 shows a cross-sectional shape of a groove 40 made of a conventional cultivation plate in a paddy field 43. Groove 40
Opens into the soil surface 44, and the left and right side surfaces 41 and the left and right side surfaces 41
And a bottom surface 42 extending between the lower ends of the two. With the formation of the groove 40, the soil existing 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 bulge 45 is formed there.

[0003] The raised portion 45 causes drainage from the soil surface 44 to the groove 40 and also causes damage to the combine blade when the combine is used, so that the raised portion 45 is preferably removed.

For this reason, in a self-propelled grooving machine disclosed in Japanese Utility Model Laid-Open No. 55-147107, a small wing plate is attached to the side surface of a grooving blade body, and the soil surface is leveled by the wing plate. .

[0005]

Problems to be Solved by the Invention
The problems of the groove cutting blade of the self-propelled grooving machine disclosed in JP-A-07-07 are as follows. (A) Since the blades are fixed to the side surfaces of the grooving blade body by welding or the like, the production becomes complicated and the blades are easily detached. (B) The dimensions of the blades in the front-rear direction are smaller than the dimensions of the grooving blade body. When making shallow grooves, the lower end of the blades does not reach the soil surface, and when making very deep grooves, the blades The board is buried in the soil and is useless.

It is an object of the present invention to provide a field grooving blade which overcomes the above-mentioned problems.

Japanese Utility Model Publication No. 3-27361 discloses a field groove cutting blade in which a flange is formed at an upper end of a groove cutting blade body. However, this flange has an extremely small overhanging dimension, and when the grooving blade advances, the flange presses the soil discharged from the soil with the formation of the groove from above, thereby substantially suppressing the formation of the bulging portion. , Do not have.

[0008]

According to the field groove cutting blade (24) of the present invention, a groove forming section (25, 27) is provided, and the groove forming section (25, 27) is connected to the field (43). While being partially buried in the ground, it is advanced to form a groove (40) corresponding to the cross-sectional profile of the groove forming portion (25, 27). In the field groove cutting blade (24), the overhang portion (26) is provided with a groove forming portion (25, 27).
Due to the formation of the groove (40), the soil discharged to the surface on both sides of the groove (40) is diffused outward in the left and right direction and pressed from above to suppress the formation of the swelling part (45) As a result, it is formed to protrude outward from the upper end of the groove forming portion (25, 27) in the left-right direction, and is formed integrally with the groove forming portion (25, 27).

The field groove cutting blade (24) has the same shape and structure, and is therefore called a cultivation blade. The field is, for example, a paddy field. The groove cutting blade (24) is, for example, a one-wheeled self-propelled vehicle (1
As the one-wheeled self-propelled vehicle (10) travels in the soil, it advances in the soil at the buried part in the soil to form a groove (40) in the soil. Since the worker presses the handle (16) of the one-wheeled self-propelled vehicle (10) from above so that the groove cutting blade (24) is maintained at a predetermined depth in the soil, the overhang portion (26) is During the advance of the grooving blade (24), a force for constantly pressing the soil surface (44) is applied.

As the groove cutting 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 near the groove (40) is Rise (45) on soil surface (44)
Try to form Since the overhang portion (26) presses the soil discharged from the groove (40) to the soil surface (44) with an appropriate force,
The formation of the raised portion (45) is suppressed.

The overhang portion (26) is provided with a groove forming portion (25,
Because it extends over the entire range from the front end to the rear end of 27), regardless of the depth of the groove (40) to be made, the soil surface (44)
, And presses the soil surface (44) to suppress the formation of the bulge (45) on the soil surface (44). Also, overhang (2
Since 6) is formed integrally with the groove forming portions (25, 27), the strength can be increased and the manufacturing can be facilitated.

According to the field groove cutting blade (24) of the present invention,
The overhang portion (26) extends at an inclination angle such that the distal end side in the overhang direction is lower than the proximal end side in the overhang direction.

A vertical cross section of the groove cutting blade (24) is taken with respect to the attitude angle of the groove cutting blade (24) during the forming operation of the groove (40). ) Is defined as θa, preferably, for example, 0
° <θa ≦ 10 °.

The soil discharged from the groove (40) is more likely to be piled up closer to the groove (40), and the amount of soil 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). Since the soil is pressed from above, the amount of the raised soil is equalized in the horizontal direction, and the height of the peak of the raised portion (45) can be reduced.

According to the field groove cutting blade (24) of the present invention,
Soil diffusion prevention part (28) that protrudes outward from the tip of the overhang part (26)
Are formed by integral molding with the overhang portion (26), and are inclined downward and outward with respect to the surface of the overhang portion (26).

The soil diffusion preventing portion (2) with respect to the surface of the overhang portion (26)
The downward inclination angle θb of the plane 8) is, for example, 40 ° ≦ θb ≦ 5.
0 °.

The overhang portion (26) diffuses the soil discharged from the groove (40) to the soil surface (44) outward in the width direction of the groove (40), and smoothes the swelling of the soil surface (44). To Overhang
With only the overhang (26), the soil diffused outward in the width direction of the groove (40) by the overhang (26) concentrates at a position slightly beyond the tip of the overhang (26), and there is New rise (45)
Is easy to form. The soil diffusion preventing portion (28) is formed on the tip side of the overhang portion (26), and is inclined outward at a steeper angle than the surface of the overhang portion (26), so that the overhang portion (26)
Soil diffused in the width direction of the groove (40) from the outside is prevented by the soil diffusion preventing portion (28) from further spreading, and the soil spreads below the overhang portion (26) and the soil diffusion preventing portion (28). While being spread in the same manner, it is stopped and pressed from above by the overhang portion (26) and the soil diffusion prevention portion (28), so that the soil diffused by the overhang portion (26) prevents the soil diffusion prevention portion (28 ) Can be prevented from forming a new raised portion (45) slightly outside the tip.

According to the field groove cutting blade (24) of the present invention,
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 for forming the bottom surface of the groove (40).
(27), and the bottom surface forming portion (27) is inclined such that the bottom surface contour of the groove (40) is a deepest valley at the center in the left-right direction.

At the center of the bottom surface of the groove (40), sediment is deposited due to sedimentation of the soil and the like, and the depth tends to be reduced rapidly and shallowly.
Since the bottom surface of the groove cutting blade (24) is formed in a valley shape by the groove (40), the center of the bottom surface of the groove (40) is made deeper, so that the depth of the groove (40) can be reduced.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of the entirety of a self-propelled grooving machine 10. The transmission shaft pipe 11 extends in the front-rear direction,
The engine 12 and the reducer 13 are each connected to a transmission shaft pipe 11.
Attached to the rear end and the front end. Engine 12
The rotation power of the transmission shaft (not shown) in the transmission shaft pipe 11
Is transmitted to the speed reducer 13 via the. The handle 16 has a base end fixed to an intermediate portion of the transmission shaft pipe 11 and extends rearward above the engine 12. Throttle lever
17 is attached to the right side of the handle 16 and the engine
The throttle opening of 12, that is, the output of the engine 12 is adjusted. The wheels 18 are integrally connected to the output shaft of the speed reducer 13 in the rotational direction, and are rotationally driven by the rotational power from the engine 12 that is transmitted through the speed reducer 13 at a reduced speed. Foliage plate
19 is fixed to the case of the speed reducer 13 so as to cover the front and upper sides of the front upper half of the wheels 18. Stay 21
Near the coupling position of the base end of the throttle lever 17 to the transmission shaft pipe 11, it is fixed to the transmission shaft pipe 11 and extends obliquely rearward. The breeding plate 24 is fixed to the stay 21 at a predetermined angle.

FIG. 2 is a side view of the working state of the self-propelled grooving machine 10 in the paddy field 43. The cultivation 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 Is buried under the ground below the soil surface 44. The worker uses a self-propelled grooving machine 10
During the forward movement of the handle 16, the handle 16 is pressed down while grasping the protruding end of the handle 16, and this pressing force acts as a pressing force of the cultivation plate 24 against the soil surface 44, thereby
The bottom plate portion 27 at the rear end of 24 is held at a predetermined depth.

FIGS. 3, 4 and 5 show the breeding plate 24 as viewed from above, from the right side and from the rear end, respectively. Soil slab
The left and right sides 24 have a symmetrical structure in an arbitrary cross section. The left and right side plate portions 25 for forming the side surface 41 of the groove 40 (FIG. 7), and the right and left side plate portions 25 project outward from the upper end of the side plate portion 25 in the left and right direction. Grooves 40 are provided at the rear ends of the left and right overhanging plate portions 26 and
Left and right bottom plate portions 27 for forming the bottom surface 42, and a protruding edge portion 28 which is connected to the distal end edge of the overhanging plate portion 26 at the base end side and projects a little further outward in the left-right direction. Side plate portion 25, overhang plate portion 26, bottom plate portion 27, and protruding edge portion
28 is a single flat metal plate (eg, aluminum,
(Metal such as stainless steel), and constitutes the main body of the breeding plate 24. The bottom plate portion 27 is provided only at the rear end of the cultivation plate 24,
At a position where the bottom plate portion 27 does not exist in the front-rear direction of the cultivation plate 24, the left and right side plate portions 25 are joined at their lower ends to each other,
The joining portion 33 of the flat plate hanging in the vertical direction is formed. FIG.
As can be understood from FIG. 7, the distance from the upper surface of the breeding plate 24, that is, the joining portion 33 to the overhanging plate portion 26, increases rearward in the front-rear direction of the breeding plate 24. The connecting portion 30 joins the left and right overhanging plate portions 26 at the front end of the cultivation plate 24, and maintains the left-to-right spacing of the left and right overhanging plate portions 26 in the front-rear direction position. The center plate 31 is
The lower end is fixed at the center in the left-right direction, and extends upward,
At the time of joining the breeding plate 24 to the stay 21 (Fig. 2),
To the lower end of the
It is fixed to 21 so that it can be separated and the angle can be selected freely. gap
29 is formed between the left and right bottom plate portions 27 and has a turnbuckle
32 is disposed at a position overlapping the gap 29 in the front-rear direction of the breeding plate 24, connects the left and right overhanging plate portions 26 to each other, and allows the operator to adjust the length, and the gap 29 is adjusted according to the length. , That is, the distance between the left and right overhanging plate portions 26 at the position of the turnbuckle 32 in the front-rear direction.

FIG. 6 is a cross-sectional view of the breeding plate 24 at the position of the joint 33 in the front-rear direction. In FIG. 6, each symbol is defined as follows on the cross section of the breeding plate 24. C: Dimension of overhang plate portion 26. E: Dimension of side plate portion 25. F: Dimension of protruding edge portion 28. G: Dimension of 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 breeding plate 24, that is, the right and left symmetry line of the cross section of FIG. 6). θb: downward angle of the protruding edge portion 28 with respect to the overhang plate portion 26. θc: downward angle of the bottom plate portion 27 with respect to the horizontal line.

Examples of preferable representative values or ranges of numerical values of each symbol are as follows. C = 54mm, E = 1
38 mm, F = 6 mm, 0 ° <θa ≦ 10 ° (preferably θa = 5 °), 40 ° ≦ θb ≦ 50 ° (preferably θ
b = 45 °), 0 ° <θc ≦ 10 ° (preferably θc =
5 °).

The operation of the breeding plate 24 will be described. As shown in FIG. 2, the cultivation plate 24 is attached to the lower end of the rear portion of the stay 21 on 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 advancing the self-propelled grooving machine 10, after which the bottom plate portion 27 of the cultivation plate 24 reaches a predetermined depth, and While maintaining, the self-propelled grooving machine 10 is advanced. Cultivation plate 24 in the ground
With the advance, the soil in front of the breeding plate 24 is swept right and left 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 having the deepest center portion in the left-right direction 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 to the left and right due to the inclination of θa, and equalizes the amount of soil swelling in the left and right direction. The protruding edge portion 28 receives the soil diffused to the left and right outward by the overhang plate portion 26 by the inclination of θb,
This prevents diffusion beyond the tip of the projecting edge portion 28 and accumulation at the tip of the projecting edge portion 28. Thus,
The soil discharged onto the soil surface 44 is pressed by the overhanging plate portion 26 and the protruding edge portion 28, thereby preventing the formation of the raised portion 45 (FIG. 7).

[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 self-propelled grooving machine in a paddy field in a working state.

FIG. 3 is a view of the cultivation plate as viewed from above.

FIG. 4 is a view of the breeding plate as viewed from the right side.

FIG. 5 is a view of the cultivation plate viewed from the rear end side.

FIG. 6 is a cross-sectional view of the breeding plate at the position of the joint in the front-rear direction.

FIG. 7 is a view showing a cross-sectional shape of a groove formed by a conventional soil slab in a paddy field.

[Explanation of symbols]

 Reference Signs List 10 self-propelled grooving machine (one-wheeled self-propelled vehicle) 16 handle 24 cultivation soil plate (groove for field, grooving blade) 25 side plate portion (groove forming portion, side forming portion) 26 overhang plate portion (overhang portion) 27 bottom plate Part (groove forming part, bottom forming part) 28 Projecting edge part (soil diffusion preventing part) 40 Groove 43 Paddy field (field) 44 Soil surface 45 Rise part

Claims (4)

[Claims] A groove forming part (25, 27) is provided.
While partially burying (25, 27) in the ground of the field (43),
A field groove cutting blade (2) which is advanced to form a groove (40) corresponding to the cross-sectional contour of the groove forming portion (25, 27).
In (4), the overhang portion (26) is provided with the groove (4) formed by the groove forming portion (25, 27).
With the formation of (0), the soil discharged to the surface on both sides of the groove (40) is diffused outward in the left-right direction, and is pressed from above to suppress the formation of the bulging portion (45). The field groove-forming device, wherein the groove-forming portion (25, 27) is formed by integral molding with the groove-forming portion (25, 27) so as to protrude outward in the left-right direction from the upper end of the groove-forming portion (25, 27). blade. 2. The groove cutting blade for a field according to claim 1, wherein the overhanging portion (26) is widened at an inclination angle in which a leading end side in the overhanging direction is lower than a base end side in the overhanging direction. 3. A soil diffusion preventing portion (28) projecting outward from a tip of the projecting portion (26) is formed by integral molding with the projecting portion (26), and a surface of the projecting portion (26) is formed. 2. The device according to claim 1, wherein the outer surface is inclined downward toward the outside.
Or the groove cutting blade for fields described in 2. 4. The groove forming portion (25, 27) includes a side surface forming portion (25) for forming left and right side surfaces of the groove (40), and a bottom surface forming portion for forming a bottom surface of the groove (40). (27), wherein the bottom surface forming portion (27) is inclined such that the bottom surface profile of the groove (40) is a deepest valley at the center in the left-right direction. The field groove cutting blade according to claim 1.