JPH0444645Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a ground leveling tool used for leveling work in fields, playgrounds, etc., and has a wide range of uses, especially considering the usability of the user and the ground conditions. be.

[Problems to be solved by conventional techniques and ideas]

Conventionally, in normal land leveling work to smooth out irregularities on the ground of fields, etc., the first step is to smooth out the relatively hard protrusions and lump-like lumps of earth so that the leveled side is leveled, as shown in Figure 2. The ground is ground finely with a serrated rake plate 6, and then the ground is leveled with a horizontal leveling plate 7 as shown in FIG. A smoothing method is being used. Note that a rake-cum-leveling plate in which the above-mentioned serrated rake plate and a horizontal leveling plate or a curved leveling plate are formed on each long side of a long plate is also used because it has the advantage of having two functions in one unit.

However, especially for soft ground or muddy paddy fields, the mud scraped when flattening with such a leveling plate is removed from the front side of the plate during the pulling operation of the leveling plate.
During pushing work, a large amount of bulge builds up on the front side of the board, which acts as a large resistance, significantly worsening work efficiency.Furthermore, if the worker continues to rely on force, the leveling board may break or bend. I had a problem with it.

[Means to solve the problem]

With this in mind, after various studies, we have developed a leveling rake plate that is particularly effective against mud and improves workability when leveling the ground.It can be attached and detached from the center of the horizontally long plate. In a ground leveling plate having a handle with a long axis, one long side of the plate is formed into a rake shape, and the other long side is formed into a shape that is convex downward when the handle is held with the rake-shaped side facing up. The device is characterized in that a ground plane curved in a direction, and a debris flow diversion surface curved in a convex manner toward the handle attachment side are provided in a continuous manner in the lateral direction between the ground plane and the handle attachment part.

[Effect]

According to such a land leveling rake plate, a soil clod is first crushed on the side of the rake shape (referred to as the rake side for convenience), and then the other side of the land leveling rake plate curves downward in a convex shape with respect to the crushed earth clod. Press against the leveled surface and grasp the handle to push and pull. Or, if there are no such clods, the rake side will not be used and the leveled surface will be used from the beginning.

When pushing at this time, the mud and clods that have piled up in front of the leveling rake plate hit the concavely curved debris flow surface diagonally downward above the leveling surface, and then easily flow laterally to either the left or right. The resistance from the soil during pushing is extremely small, resulting in good workability. Furthermore, since the ground plane of this structure has a downwardly convex shape, it is possible to run over large clods of earth or bumps in the ground, thereby further eliminating resistance.

The above effect is effective even on dry ground, sandy ground, etc., but especially on muddy land containing water such as rice fields, it exhibits the effect of weakening water resistance.

Furthermore, the convex shape of the ground contact surface has a similar effect when pulling the ground leveling tool toward the handle, making it possible to perform smooth work without requiring much force.

In addition, the magnitude of the curvature of the debris flow diversion surface is as follows:
The radius is approximately 40mm based on the level of force applied by one worker.
The degree of curvature is appropriate; if the curvature is larger than this, the resistance of the raised mud etc. will be too large and will impair work efficiency, while if it is smaller, the curvature will have the effect of causing the mud etc. to flow laterally along this debris flow surface. will disappear.

In addition, the ground contact side on the rake side is linear, and the shape of the plane orthogonal to the ground contact side and the transverse longitudinal section of the plate 5 may be any shape, for example, straight, arcuate, or square. The curved shape of the character is highlighted.

〔Example〕

Next, the present invention will be explained in detail with reference to the drawings.

As shown in Fig. 1 A and B, a debris flow diversion surface 2 is provided on the side to which the handle 1 is attached, in which an arcuate convex shape with a radius of 40 mm is formed continuously in the horizontal direction, and one side of the debris flow diversion surface 2 is provided. A convex ground surface 3 was provided on the side opposite to the convex shape of the debris flow surface 2 by extending the side thereof, and these were used as a ground leveling plate 4. Further, a saw-shaped rake plate 5 was provided extending in the lateral direction on the other side of the debris flow diversion surface 2.

The length of the handle in the middle between the leveling plate 4 and the rake plate 5 is approximately 1.8 m, and all of these materials are
Made of Al alloy.

[Effect of idea]

As described above, according to the present invention, in the leveling work of leveling raised soil, etc., the resistance from the soil can be minimized to an extremely low level, resulting in excellent workability.Furthermore, since the leveling plate is provided integrally with the rake plate, it can be used within a wide range of applications. This has remarkable effects such as widening the area.

[Brief explanation of the drawing]

Figures 1A and 1B show one embodiment of the present invention, where A is an external view, B is a side view, Figure 2 is an external view showing a conventional serrated rake plate, and Figure 3 is a conventional horizontal alignment. External view showing the base plate. FIG. 4 is an external view showing a conventional curved leveling plate. 1... Handle, 2... Debris and rock diversion surface, 3... Ground plane, 4... Leveling plate, 5... Rake plate, 6... Serrated rake plate, 7... Horizontal leveling plate, 8... Curved leveling Main plate.

Claims (1)

[Scope of utility model registration request] In a ground leveling board that has a long handle that is detachably attached to the center of a horizontally long board, one long side of the board is formed into a rake shape, and the other long side is placed with the rake-shaped side facing upward. A ground plane that curves convexly downward when the handle is held, and a debris flow diversion surface that curves convexly toward the handle attachment side are provided in a continuous manner in the lateral direction between the ground plane and the handle attachment part. A land leveling rake board characterized by: