JPH0117123Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tilling device used for making beds for planting root vegetables such as Japanese yam, and aims to make the soil density of the tilled area substantially uniform.

Conventionally, a tillage device for making a planting bed for root vegetables such as Japanese yam has been equipped with a machine frame, a lifting frame that can be raised and lowered on the machine frame, and a vertical tilling shaft. There is one that consists of a rotatable cultivation part that penetrates into the ground around the core.

By the way, conventionally, the tilling body of the tilling section is a tilling body 31 that simply projects radially outward from the lower end of the tilling shaft 22, as shown by the imaginary line in FIG. Since the tilling body 31 and the lower end of the tilling shaft 22 were not sloped in terms of direction, and the lower end of the tilling shaft 22 was at the same height, the cylindrical part when the tilling shaft 22 was pulled out of the soil flowed into the excavated area. The soil and the surrounding soil were hardly agitated, so the density of the soil that flowed into the excavation remained looser than the density of the surrounding soil, and was soft. Therefore, if there is rainfall after planting root vegetables, the soil in the columnar part may become uneven and a cavity may be formed in the middle of the columnar part in the height direction. There have been problems in that the roots of root vegetables are cut off due to the occurrence of this disease, or that the roots of root vegetables do not grow straight due to the formation of cavities.

Therefore, as shown in FIGS. 4 and 5, the tilling body 23' at the lower end of the tilling shaft 22 having the tilling member 24' is provided in an inclined shape (135 degrees) that becomes lower toward the tip. The inventor of the present invention attempted to stir the soil below the lower end of the soil.

In the comparative example shown in FIGS. 4 and 5, when the tilling section is raised, the soil around the excavation mark of the tilling shaft 22 is removed by the tilling body 2.
3', which is more advantageous than the conventional technology, but because the tiller body 23' does not receive any downward thrust within its diameter, the soil density in the cylindrical part is still uneven, and it is difficult to cultivate crops. There was a problem with the growth.

The present invention not only provides the tilling body at the lower end of the tilling shaft having the tilling member radially outward and slanting downward, but also provides the tilling body with a function of applying downward and inward thrust. The purpose is to make the soil density of the cylindrical part approximately uniform.

In order to achieve such an object, the present invention includes a tilling shaft that can penetrate into the ground and be pulled out from the ground, and a tilling member and a shaft that protrudes outward in the radial direction and is inclined downward at the lower end side of the shaft. In the tilling device, the tilling body is equipped with a tilling body, and the tilling shaft is rotatable around the vertical axis, and the tilling body is provided with a thrust acting part that applies a downward thrust in a radial inward direction by rotation of the tilling shaft. It is characterized by this.

Hereinafter, the first embodiment of the present invention will be explained based on the drawings of FIGS. 1 to 3. In FIG. is installed. 3 is a hydraulic pump driven by a PTO shaft 4, and is provided on the rear surface of the vehicle body 1. A tilling device 6 is provided at the rear of the vehicle body 1 via a three-point linkage mechanism 5 so as to be detachable and movable up and down.

The tilling device 6 includes a machine frame 7 connected to a three-point link mechanism 5, a tilling section 8 rotatably provided around a vertical axis, and a rotary drive that rotates the tilling section 8 around the vertical axis. 9, an elevating frame 10 that supports the cultivating section 8 and the drive section 9 so as to be able to rise and fall with respect to the machine frame 7, and an elevating drive section 11 that drives the elevating frame 10 up and down.

The machine frame 7 includes guide rails 12 made of a pair of left and right channel members vertically erected.

The elevating frame 10 includes a pair of left and right elevating bodies 14 that can be raised and lowered along each guide rail 12 via a pair of upper and lower guide wheels 13, and each elevating body 14 that is arranged laterally behind the guide rail 12. It was concluded that
and lower support members 15 and 16.

The elevating drive unit 11 consists of a hydraulic cylinder 17 and a hoisting elevating mechanism 18.
It is composed of a fixed wheel body 19, a driving wheel body 20, and a wrapping member 21.

The tilling section 8 has a pair of left and right, as shown in FIGS. 2 and 3, a vertical cylindrical tilling shaft 22,
It consists of a tilling body 23 and a tilling member 24, and the tilling shaft 22 is flanged to an intermediate shaft 25 above it, and the intermediate shaft 25 is supported by the lower support member 16. The tilling bodies 23 have a digging function, a tilling and crushing function, and a soil stirring function, and are plate-shaped, and are provided in pairs projecting radially outward from radially symmetrical points at the lower end of the tilling shaft 22. The tilling body 23 has an inclined shape that becomes lower toward the tip, and in the illustrated example, the angle between the tilling body 23 and the tilling shaft 22 is 135°, and furthermore, the angle between the tilling body 23 and the tilling shaft 22 is 135°. Direction of rotation when descending) By providing the plate surface with an inclination so that the front side is lower than the rear side, the thrust acting part 23A applies a downward thrust in the radial inward direction by the rotation of the tilling shaft 22. is formed. The tilling members 24 have a tilling and crushing function and a soil stirring function, and are provided in large numbers on the upper side of the tilling body 23 of the tilling shaft 22 so as to be shifted in position in the circumferential direction and in the vertical direction, and protrude outward in the radial direction.

The rotational drive unit 9 consists of a pair of left and right reducers 26 corresponding to each tilling unit 8, a hydraulic motor 27 that drives one of the reducers 26, and a winding transmission mechanism 28 that interlocks both reducers 26. The support member 15 is provided with the support member 15 . Each speed reducer 26 is operatively connected to the intermediate shaft 25.

Note that the hydraulic cylinder 17 and the hydraulic motor 27 are driven by hydraulic oil from the hydraulic pump 3 and are controlled by a control device 29, and the hydraulic motor 27 is capable of forward and reverse rotation.

In the above configuration, for example, when creating a planting bed for root vegetables such as Japanese yam, first, the hydraulic cylinder 17 is extended, and the lifting/lowering mechanism 18 is used to raise and lower the bed as shown by the imaginary line in FIG. Guide rail 12 for frame 10
Raise it to the upper limit position along . In this state, the hydraulic motor 27 is rotated forward and the winding transmission mechanism 2
8. While rotating each tilling section 8 in the normal rotation direction via the reducer 26 and the intermediate shaft 25, the hydraulic pressure of the hydraulic cylinder 17 is released, and while the hydraulic cylinder 17 is contracted, the lifting frame 10 and the tilling section are rotated. 8. The rotary drive unit 9 and the like are lowered while being guided by the guide rails 12 and guide wheels 13 by their own weight. As a result, the tilling body 23 that precedes the tilling shaft 22 excavates in the vertical direction, tills and crushes the soil while stirring the soil, and the tilling section 8 penetrates into the ground in the vertical direction. The member 24 is a columnar part 30 underground.
By tilling and crushing the soil while stirring, the soil becomes uniformly granular soil suitable for planting root vegetables. After the tilling part 8 excavates to a predetermined depth, the tilling part 8
While reversing the movement, the hydraulic cylinder 17 is extended to raise the elevating frame 10, the tilling section 8, etc.

By the way, when the tilling section 8 is raised, the tilling shaft 2
Surrounding soil flows into the excavation mark 2, and the excavation mark is filled with soil whose density is sparser than that of the surrounding soil, but in the embodiment of the present invention, the cultivating body 23 becomes lower toward the tip. Moreover, since the tilling shaft 22 forms a downward and inward thrust acting portion 23A due to the rotation of the tilling shaft 22, the tilling shaft 2
Since the soil below the lower end of 2 is stirred, when the tilling section 8 is raised, the soil that has flowed into the hole left by the tilling shaft 22 and the surrounding soil are suitably stirred, and as a result, the soil density is reduced. The surrounding soil is collected into the above-mentioned excavation mark to make the soil density and hardness of the columnar part 30 uniform. Therefore, even if it rains after root vegetables are planted, the soil in the columnar part 30 remains uniform, and a hollow part may occur in the middle of the columnar part 30 in the height direction. Therefore, there is no fear that the roots of root vegetables will be cut off or that the roots will not grow straight due to the formation of cavities.

In addition, in the embodiment, a pair of tilling bodies are arranged at equal intervals in the circumferential direction at the lower end of the tilling shaft, but three or more tilling bodies may be arranged at approximately equal intervals in the circumferential direction at the lower end of the tilling shaft. .

As detailed above, according to the present invention, the intended purpose is fully achieved and the soil density of the plowed area becomes approximately uniform, so even if root vegetables are planted in this plowed area, the roots of the root vegetables will not be cut off. There is no risk that the roots will not grow straight or that the roots will not grow straight. The present invention has the above-mentioned advantages, has a simple structure, can be implemented at low cost, and is highly profitable.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, FIG. 1 is an overall side view, FIG. 2 is a front view of main parts,
Fig. 3 is a sectional view taken along the line A-A in Fig. 2, Fig. 4 is a front view of main parts showing a conventional example and a comparative example, and Fig. 5 is a
It is a sectional view taken along the line BB in the figure. 6... Tilling device, 7... Machine frame, 8... Tilling section,
9... Rotation drive unit, 10... Elevating frame, 11... Elevating drive unit, 22... Cultivating shaft, 23... Cultivating body, 2
4...Plowing member, 30...Cylindrical part (tillage trace).

Claims (1)

[Scope of Claim for Utility Model Registration] A tilling shaft 22 that penetrates into the ground and can be pulled out from the ground, and a tilling member 24 and a tilling body that protrudes radially outward at the lower end of the shaft and is inclined downward. 23, in which the tilling shaft 22 is freely rotatable around the vertical axis, the tilling body 23 is provided with a thrust acting portion 23A that applies a downward thrust in the radial inward direction by the rotation of the tilling shaft 22. A tillage device characterized by: