JPH0822A - Boring apparatus for soil - Google Patents

Abstract

PURPOSE:To improve rooting of a bulb which is placed in a planting hole. CONSTITUTION:In a tractor 1, an oil-pressure cylinder 7 is placed at the rear side of the vehicle 2 and a lifting member 12 is placed at the lower part of a piston rod 11 of the oil-pressure cylinder 7. The lifting member 12 supports plural boring devices 16 on it in such a manner as to be rotatable around their axes. For boring the soil S of a field G, the boring devices 16 are rotated by a rotation-driving means 18 at a specified rotation speed and at the same time the lifting member 12 is lowered by the oil-pressure cylinder 7. Boring members 21 of the boring device 16 bore the soil S and at the same time the bored soil is scraped out from the holes. Plural holes having a specified depth are formed in the soil S by the operation. After forming the holes, the lifting member 12 is lifted by the oil-pressure cylinder 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil drilling device attached to a work vehicle such as an agricultural tractor, and more particularly to a device for drilling holes in the soil for planting bulbs or potatoes.

[0002]

2. Description of the Related Art Conventionally, when planting a bulb or the like on a farmland, an agricultural worker pierces a soil with a piercing rod to form a hole having a predetermined depth, and inserts the bulb or the like into the formed hole. During the above-mentioned drilling work, a large amount of force is required to insert and remove the drilling rod into the soil, so the work was a heavy labor.

[0003]

In order to solve the above problems, the applicant of the present invention considered an apparatus for automatically forming the above-mentioned planting holes prior to the present application. In this device, a hydraulic cylinder extending vertically is provided at the rear part of an agricultural tractor, and a drilling rod is fixed to the lower part of a piston rod of the hydraulic cylinder. The drilling rod is pushed into the soil by the descending force of the hydraulic cylinder to form a planting hole, and then the rod is pulled out from the hole by the ascending force of the hydraulic cylinder.

The previously proposed device is excellent in that the drilling work can be facilitated because the drilling rod can be inserted into and removed from the soil by the hydraulic cylinder. However, since the hole for planting is formed by strongly pressing the drilling rod into the soil, the following problem is newly generated.

Since the inner surface of the formed hole is strongly pressed and solidified by the strong press-fitting of the rod, the rooting of the bulb or the like inserted into the hole may be deteriorated. In the case of soil having a high water content, the soil may stick to the outer peripheral surface of the rod when the rod is pulled out from the formed hole. For this reason, the diameter of the hole formed when the rod is lowered next time becomes small, which is not sufficient as a hole for planting. When the soil to be drilled is hard, the resistance to press-fitting of the rod increases, so that the number of holes that can be formed by one descending operation decreases.

An object of the present invention is to improve the rooting of a bulb or the like inserted into the formed hole, prevent the diameter of the hole from becoming small, and easily form the required number of holes. Especially.

[0007]

In order to achieve the above object, the present invention is a drilling device configured as follows, for example, as shown in FIGS. 1 to 5.

A lifting / lowering drive means 7 is provided on the vehicle body 2 of the work vehicle 1, and the lifting / lowering member 1 is moved up and down by the lifting / lowering drive means 7.
A plurality of vertically extending drilling tools 16 are provided on the lower side of 2, and each of the above drilling tools 16 is rotatably supported by the elevating member 12 so as to be rotatable about its axis, and the rotation for rotating these drilling tools 16 is performed. The drive means 18 was provided and comprised.

[0009]

The present invention operates as follows, as shown in FIGS. 1 and 2, for example. When making a hole for planting in the soil S of the farmland G, first, the work vehicle 1 is stopped at a predetermined position. Then, the elevating and lowering member 12 is moved down by the elevating and lowering driving means 7 while rotating the plurality of punching tools 16 at a predetermined rotational speed by the rotational driving means 18. Then, the excavating member 21 of each drilling tool 16 excavates the soil S and scrapes the excavated soil out of the hole. As a result, a plurality of holes having a predetermined depth are formed in the soil S.
After forming the hole, the lifting / lowering member 12 may be lifted by the lifting / lowering drive means 7.

[0010]

The present invention has the following effects because it is configured and operates as described above. By rotating the drilling tool and lowering it toward the soil, it is possible to smoothly excavate the soil while scraping it. Therefore, the pushing force at the time of drilling may be smaller than that of a device that only presses the drilling tool into the soil.

Therefore, it is possible to prevent the inner surface of the formed hole from being compacted, and the rooting of the bulb or the like inserted into the hole is improved. Further, when the soil adheres to the outer peripheral surface of the hole forming tool when the hole forming tool is removed from the formed hole, the adhered soil is scraped off by the rotational contact with the inner peripheral surface of the hole or the rotation of the hole forming tool. It may be shaken off by centrifugal force. Therefore, even if the soil has a high water content, the soil can be prevented from accumulating on the outer peripheral surface of the punch. As a result, holes having substantially the same diameter can be formed during the entire drilling operation. In addition, the work efficiency can be improved because the labor for scraping the accumulated soil can be saved. Further, since the pushing force required for drilling is small, the number of holes that can be formed by one descending operation is large, which also improves the work efficiency.

According to the first aspect of the invention, when the lifting plate is provided with the pressing plate for pressing the upper surface of the soil, the upper surface of the peripheral wall of the formed hole can be pressed by the plate. Therefore, even in soil having a low water content, it is possible to prevent the corner portions of the upper surface of the peripheral wall of the hole from collapsing into the hole and to make the depth of the hole constant.

Further, in the structure of the above-mentioned claim 1, when at least one of the rotation speed and the rotation direction of the rotation driving means is controllable, the excavation condition of the drilling tool is selected according to the soil condition. Therefore, it is possible to form a hole having a desired depth and a desired diameter easily and with good finish.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, the overall configuration of the punching device will be described with reference to FIGS. 1 and 2. FIG. 1 is a side view of a soil drilling device attached to an agricultural tractor. Figure 2
[Fig. 4] is a rear view of the above-mentioned punching device.

A top link 3 and a lower link 4 are provided at the rear part (right part in FIG. 1) of a vehicle body 2 of a tractor 1 which is a work vehicle.
The frame 6 is supported via the connection link 5 and the link 5 in a vertically adjustable manner. A hydraulic cylinder 7, which is a lifting drive unit, is attached to the frame 6. Reference numeral 8 is a rear wheel of the tractor 1. Reference sign G is farmland and reference sign S is soil.

Piston rod 1 of the hydraulic cylinder 7
An elevating member 12 is attached to the lower end portion of 1. The elevating member 12 is configured to be vertically swingable in FIG. 2 by a pin 13, and is configured to be vertically swingable in FIG. 1 by another pin 14. further,
An elastic means (not shown) such as a spring is provided between the piston rod 11 and the elevating member 12, and the elevating member 12 is kept in the neutral position in FIGS. 1 and 2 by the elastic means. There is.

On the lower side of the elevating member 12, fifteen hole-piercing tools 16 extending in the vertical direction are arranged at predetermined intervals. Each drilling tool 16 is supported by the elevating member 12 via a bearing portion 17 in a rotatable state about its axis. A pressing plate 12 a for pressing the upper surface of the soil S is provided below the elevating member 12.

The above-mentioned hole making tool 16 and the hole making tool 16
The rotation drive means 18 for rotating the motor will be described with reference to FIGS. FIG.
FIG. 3 is a schematic view taken along the line III-III in FIG. 1 described above. FIG.
It is an enlarged view of the above-mentioned hole punching tool 16, (a) figure is an elevation view and (b) figure is a top view. FIG. 5 is a diagram showing a transmission mechanism of the rotation drive means.

As shown in FIG. 4, the above-mentioned punch 16
Is a cylindrical excavation member 21 press-formed into a truncated cone shape,
Three rods 22 projecting upward from the upper part of the excavating member 21, a disc 23 fixed to the upper parts of these rods 22, and a shaft 2 projecting upward from the disc 23.
4 and.

As shown in FIG. 3, each shaft 24 described above is
A pulley 26 is fixed to the pulley 26, and adjacent pulleys 26 are connected to each other by a belt 27. The input unit 29 is provided on one of the plurality of shafts 24. The input unit 29 is, as shown in FIGS.
It is connected to the power take-off shaft 34 of the tractor 1 through the output unit 31 of 0, the propeller shaft 32, and the speed reduction unit 33 in this order. The propeller shaft 32 includes two universal joints 36.

A control means 38 (see FIG. 1) for controlling the rotation speed and rotation direction of the power take-off shaft 34 is provided. The control means 38 is equipped with a transmission (not shown) and the like, and is provided with the power tool shaft 34 through the hole punching tool 16 described above.
The rotation speed and the rotation direction of the can be adjusted. The deceleration unit 33 may be omitted.

The drilling work by the above-mentioned device is carried out by the following procedure as shown in FIGS. 1 and 2. First, the top link 3 is expanded / contracted to position the frame 6 and the hydraulic cylinder 7 at a desired height from the upper surface of the farmland G. Then, the tractor 1 is stopped at a predetermined position. Subsequently, the punching tool 16 is rotated at a predetermined rotation speed, and in this state, the lifting / lowering member 12 is lowered by the hydraulic cylinder 7. Then, the excavating member 21 excavates the soil S, and when the pressing plate 12a below the elevating member 12 contacts the upper surface of the soil S, a plurality of holes having a predetermined depth are formed in the soil S. To be done. After forming the planting hole, the lifting member 12 is raised by the hydraulic cylinder 7.

A spiral groove, a guide blade, or the like is provided on the inner peripheral surface or the outer peripheral surface of the cylindrical excavating member 21 so that the soil in the hole can be smoothly scraped out of the hole during the formation of the hole. Is preferred. Thereby, it is possible to prevent the excavated soil from remaining at the bottom of the formed hole. Further, since the soil that has been scraped out can be used for covering soil after inserting a bulb or the like into the hole, it is not necessary to bring soil for covering soil from another place, and the covering work is not troublesome.

The pressing plate 12a may be provided as an independent component in the lower space of the elevating member 12 so as to be supported by the elevating member 12 so as to be vertically movable and urged downward by a spring. In this case, even if the depth of the hole formed in the soil S is made shallow, the upper surface of the peripheral wall of the hole can be pressed by the pressing plate, so that the corner portion of the upper surface of the peripheral wall can be prevented from collapsing into the hole. The control means 38 may control either one of the rotation speed and the rotation direction of the punch 16 instead of controlling both the rotation speed and the rotation direction.

6 to 11 each show a modification of the above embodiment. In each modified example, members having the same configurations as those of the above-described embodiments are basically described with the same reference numerals.

FIG. 6 is a view corresponding to FIG. 3 and shows a first modification of the rotation driving means 18. In this case, the sprocket 41 is fixed to the shaft 24 of each punch. These plural sprockets 41 are rotationally driven by one chain 42.

FIG. 7 is a view corresponding to FIG. 3 of the above and shows a second modification of the rotation driving means 18. In this case, the input part 29 is provided at a position different from the shaft 24 of the punch. A chain 44 is wound around another sprocket 43 fixed to the input section 29 and a plurality of sprockets 41 fixed to the shaft 24.

FIG. 8 is a view corresponding to FIG. 4 described above and shows a first modification of the punching tool 16. In this case, four excavation rods 45 project downward from the disk 23.

FIG. 9 is a view corresponding to FIG. 4 of the above, and shows a second modification of the drilling tool 16. The drilling tool 16 includes a truncated cone-shaped drilling member 46 and a shaft 24.

FIG. 10 is a view corresponding to FIG. 4 of the above and shows a third modification of the drilling tool 16. The drilling member 46 of the drilling tool 16 includes a cylindrical portion 47 and a conical portion 4.
8 and.

In each of the modified examples of FIGS. 8 to 10 described above, a spiral groove, a guide vane or the like is provided on the outer peripheral surface of the excavation rod 45 or the excavation member 46 to remove the soil in the hole during the formation of the planting hole. It is preferable to allow smooth scraping.

FIG. 11 shows a modification of the drive source of the rotary drive means, which is a hydraulic motor 5 fixed to the housing 51.
2, the output unit 54 is rotationally driven via the speed reduction unit 53. This output unit 54
Are connected to the input unit 29 shown in FIG.

The above-described embodiments and modifications can be further modified as follows. The lifting drive means may be a pneumatic cylinder or another type of actuator such as an electric motor instead of the hydraulic cylinder. The plurality of punches may be rotated by a large number of gears instead of being rotated by a belt or a chain. It is also possible to provide a driving machine such as an electric motor or a hydraulic motor for each of the above-described drilling tools and directly drive the drilling tools by the driving machine. In this case, the rotation driving means is composed of the plurality of driving machines.

[Brief description of drawings]

FIG. 1 is a side view of a soil drilling device mounted on an agricultural tractor according to an embodiment of the present invention.

FIG. 2 is a rear view of the punching device.

3 is a view taken along the line III-III in FIG. 1 and is a schematic plan view of the rotation driving means.

4A and 4B show a hole making tool of the hole making device, wherein FIG. 4A is an elevation view and FIG. 4B is a plan view.

FIG. 5 is a diagram showing a transmission mechanism of the rotation drive means.

FIG. 6 is a view showing a first modified example of the rotation driving means and corresponding to FIG. 3 described above.

FIG. 7 is a view showing a second modification of the above rotary drive means and corresponding to FIG. 3 described above.

FIG. 8 is a view corresponding to FIG. 4 described above, showing a first modification of the hole punching tool.

FIG. 9 is a view showing a second modified example of the above-described hole making tool and corresponding to FIG. 4 described above.

FIG. 10 is a view showing a third modified example of the above-described drilling tool and corresponding to FIG. 4 described above.

FIG. 11 is a view corresponding to FIG. 5 described above, showing a modified example of the drive source provided in the rotation drive means.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Work vehicle (tractor), 2 ... Vehicle body, 7 ... Lifting drive means (hydraulic cylinder), 12 ... Lifting member, 12a ... Presser plate, 16 ... Drilling tool, 18 ... Rotation drive means, 38 ... Control means,
S ... soil.

Claims (3)

[Claims] 1. A lifting / lowering drive means for a vehicle body (2) of a work vehicle (1)
(7) is provided, and a plurality of punching tools (16) extending in the vertical direction are provided below the elevating member (12) that is elevated and lowered by the elevating and lowering drive means (7). 2. A soil drilling device, comprising: each of the drilling tools (16) rotatably supported about an axis thereof, and a rotary drive means (18) for rotating the drilling tools (16). 2. The soil drilling device according to claim 1, wherein the lifting member (12) is provided with a holding plate (12a) for pressing the upper surface of the soil (S). Drilling device. 3. The soil boring device according to claim 1, further comprising a control means (38) for controlling at least one of a rotation speed and a rotation direction of the rotation drive means (18). , A soil drilling device characterized by the above.