JP2019208444A - Planting boring tool - Google Patents

Abstract

To provide a planting boring tool which is suitable for digging work for soil in which obstacles such as gravels and roots are mixed, and intimate soil in forest land soil.SOLUTION: There is provided a planting boring tool for forming a planting hole in which a seedling of a tree or plant is planted, the planting boring tool comprising: a rotary axis 10 which can be rotated by drive force from an electric tool or by human power drive force; a spiral blade 20 for digging the soil to an upper side and discharging the dug soil to the upper side and being provided on a periphery of the rotary axis 10; and a hole saw 30 for cutting a peripheral part of a foundation by rotation by the rotary axis 10. A cutting blade 31 provided on a lower edge of the hole saw 30 is provided below a lowermost end 21 of the spiral blade 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a planting punch for providing a planting hole for planting seedlings such as trees and agricultural crops in the ground, and more particularly to a planting drilling tool that can cope with various soil conditions.

Patent Document 1 below discloses a seedling-planting punch for providing a planting hole for planting a seedling such as a kite in a kite.
This seedling-planting drilling tool is configured to be attachable to and detachable from an off-the-shelf electric tool, rotates with a rotational force from a drive-side rotary shaft, and has a passive-side rotary shaft with a sharpened tip at the tip, and a passive-side rotary shaft A spiral body wound around the outer periphery of the body, and a substantially cylindrical excavated soil scattering prevention cover attached to the outer periphery of the spiral body.
The spiral body is provided for discharging excavated soil, and the excavated soil scattering prevention cover is provided for preventing the excavated soil discharged by the spiral body from being scattered around.

JP 2009-195153 A

However, in the above-described seedling planting drilling tool, there is a concern that the excavation efficiency may be lowered due to at least one of the problems described below.
(1) There is no hindrance in use in soft soil environments such as firewood. The excavation may stop due to clogging.
(2) Since the electric tool is continuously driven while excavation does not proceed, battery consumption of the electric tool becomes severe.
(3) Labor is required for cleaning work to remove clogs such as earth and sand, and work time is lost.

  Therefore, an object of the present invention is to provide a planting drilling tool suitable for excavation work such as dense soil of forest soil, viscous soil, soil mixed with obstacles such as gravel and roots.

1st invention of this application made in order to solve the said subject is a drilling tool for planting for providing the planting hole for planting seedlings, such as a tree and a plant, in the ground, Comprising: From human power or an electric tool A rotary shaft that can be rotated by the driving force of the shaft, and provided on the outer periphery of the rotary shaft, excavating and discharging earth and sand upward, and cutting the outer peripheral portion of the ground by rotation by the rotary shaft The cutting blade provided at the lower edge of the hole saw is positioned below the lowermost end of the spiral blade.
The second invention of the present application is characterized in that, in the first invention, a side wall of the hole saw is joined to a side edge of the spiral blade.
The third invention of the present application is characterized in that, in the first invention or the second invention, the tip of the rotary shaft is positioned below the cutting blade.
According to a fourth invention of the present application, in any one of the first to third inventions, the rotating shaft is configured to be detachable from an electric tool.

According to the present invention, at least one of the effects described below is achieved.
(1) Since the hole saw provided in the drilling tool for planting excavates and cuts the soil mixed with obstacles such as dense soil, viscous soil, gravel and roots, soil removal by the spiral body does not stagnate.
(2) The power tool will not continue to be driven in a state in which the rotational torque is abnormally increased and the excavation capacity is abnormally reduced due to clogging phenomenon due to the discharged sand inside the spiral body, etc., thus preventing unnecessary battery consumption of the power tool. be able to.
(3) Work time is not wasted by cleaning work to remove clogging of earth and sand.
(4) Compared to the engine type, it is lighter and lower noise, so the physical burden on the worker is reduced, and the workability and safety on steep slopes and mountains with poor footing are improved and light labor can be realized.
(5) Since large equipment such as heavy machinery is not used, a planting hole can be formed in an inclined place or a narrow place. Moreover, the cost which forms a planting hole can be suppressed.
(6) Since the planting hole is formed using the rotational force of a driving source such as an electric tool, the planting hole can be reliably formed even in hard soil, viscous soil, or soil mixed with roots.
(7) Compared with the heavy engine type, the weight can be reduced and the labor can be reduced, and the drilling operation that relies on human power can be reduced.

The whole block diagram of the drilling tool for planting which concerns on this invention. The use image figure of the drilling tool for planting which concerns on this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

<1> Overall configuration (Fig. 1)
The planting punch A according to the present embodiment (hereinafter also simply referred to as “punch”) is an attachment-type jig configured to be detachable from the electric power tool B.
In FIG. 1, an example of the whole structure of the punching tool A for planting which concerns on this invention is shown.
Fig.1 (a) is a front view of the punching tool A for planting, and FIG.1 (b) is a rear view of the punching tool A for planting.
The planting punch A according to the present embodiment includes at least the rotating shaft 10, the spiral blade 20, and the hole saw 30.
Details of each element will be described below.

<2> Rotating shaft (Fig. 1)
The rotary shaft 10 is an element for transmitting a rotational force to the spiral blade 20 and the hole saw 30.
In this embodiment, one end (rear end) side of the rotary shaft 10 is configured to be detachable from the electric power tool B, and the other end (front end) side of the rotary shaft 10 is pierced into the ground at the start of excavation work. A sharpened portion 11 is provided for preventing the entire shaking.
In this embodiment, the tip of the sharpened portion 11 has a cross shape like a Phillips screwdriver.

<3> Spiral wing (Fig. 1)
The spiral blade 20 is an element for excavating the ground and discharging excavated soil and the like.
In this embodiment, the spiral blade 20 is constituted by a spiral blade 20 provided in a spiral shape around the rotating shaft 10.
The gradient of the spiral blade 20 may be constant, or may be configured to increase upward.
Further, the spiral blade 20 may be disposed so that the blade portions are continuous, or the blade portions may be intermittently disposed in a substantially stepped shape.
In addition, what is necessary is just to determine suitably the length which provides the spiral blade 20 with the depth of the hole D to plant. In this embodiment, the length of the spiral blade 20 is set longer than the depth of the hole D.

<4> Hole saw (Figure 1)
The hole saw 30 is an element for promoting excavation and earth removal of the ground by the spiral blade 20.
The hole saw 30 is a ring cutter provided with a cutting blade 31 at its tip (lower end).
The cutting blade 31 is positioned slightly above the sharpened portion 11 of the rotating shaft 10 and is positioned below the lower end of the spiral blade 20.
By setting it as the said positional relationship, the excavation earth and sand by which excavation of the ground with the cutting blade 31 preceded can be discharged | emitted with the spiral blade 20. FIG.
Further, in the present embodiment, the side saw 22 of the spiral blade 20 and the inner surface 321 of the side wall 32 of the hole saw 30 are joined so that the hole saw 30 rotates together with the spiral blade 20 by the rotation of the rotating shaft 10. .

<4.1> Configuration of Cutting Blades The number and pitch of the cutting blades 31 may be appropriately determined within a range in which excavation performance is ensured with respect to soil conditions for excavation work.

<4.2> About the shape of the hole saw The shape of the hole saw 30 (the length in the vertical direction, the thickness of the peripheral wall, etc.) is appropriately determined within a range that does not cause deformation or breakage due to digging resistance during excavation work. can do.
That is, since the shape of the hole saw 30 can be optimized according to various conditions such as the soil quality of the excavation site and the diameter of the drilling hole, all the various shapes are included in the present invention.

<4.3> Coexistence of ensuring strength of hole saw and suppression of clogging of earth and sand In addition, when excavated earth and sand have a high viscosity property such as clay, the excavated earth and sand easily adhere to inner surface 321 of side wall 32 of hole saw 30. As a result, the flow of the soil removal is blocked, and it becomes easy to cause sediment clogging inside the hole saw 30.
This phenomenon becomes more prominent as the area of the side wall 32 of the hole saw 30 that overlaps the spiral blade 20 increases.
Therefore, the shape of the hole saw 30 is preferably configured such that the area of the side wall 32 of the hole saw 30 is as small as possible within a range that satisfies the above-described desired strength.
Therefore, when an experiment was conducted by changing the wall area of the side wall 32, when the area of the side wall 32 per rotation of the spiral blade 20 was 30% or less of the total blocked area, adhesion of viscous soil and gravel were prevented. The remarkable effect which prevents obstruction | occlusion of solid bodies, such as, was able to be acquired.

Further, in order to rotate the hole saw 30, it is necessary to transmit the rotational force of the rotary shaft 10 to the hole saw 30.
Therefore, in this embodiment, the side wall 32 of the hole saw 30 is formed from the lowermost end 21 of the spiral blade 20 by approximately 1/2 pitch of the spiral locus, and the side wall 32 of the hole saw 30 and the side edge 22 of the spiral blade 20 By joining, the balance of securing the bonding strength of the hole saw 30 and the suppression of soil clogging by reducing the area of the inner surface 321 of the hole saw 30 is balanced.

<5> How to use (Fig. 2)
In FIG. 2, the use image figure of the drilling tool A for planting which concerns on this invention is shown.
(1) Start of excavation work (Fig. 2 (a))
First, in the state where the drilling tool A for planting according to the present invention is attached to the electric power tool B, the sharpened portion 11 is pierced and positioned at the approximate center of the planned excavation location.
Thereafter, the electric tool B is driven to start the rotation of the spiral blade 20 and the hole saw 30.
(2) Formation of planting hole (FIG. 2 (b))
Next, the drilling tool A for planting is press-fitted and the excavation work is advanced to a predetermined depth to form a hole D to be a planting hole.
At that time, even if the soil is close or there are obstacles such as root C or gravel in the ground, the drilling of the soil or cutting of the root C is performed with the hole saw 30 in advance. The excavation soil is smoothly discharged by the spiral blade 20 and the excavation work is not delayed.
Further, by configuring the side wall 32 of the hole saw 30 to have as small an area as possible, it is possible to reduce the possibility that the rotation of the spiral blade 20 is stopped due to the clogging of excavated sediment on the inner surface 321 of the side wall 32. it can.
(3) Planting seedlings (Figure 2 (c))
After the excavation work has progressed to a predetermined depth, the seedling E is put into the hole D, and the seedling E is fixed by returning the excavated soil discharged during drilling to the hole D.

<6> Modifications Note that the planting drilling tool according to the present invention may have a mode in which a rotating force is applied to the rotating shaft by human power (not shown).

A Planting punch 10 Rotating shaft 11 Sharp point 20 Spiral blade 21 Bottom end 22 Side edge 30 Hole saw 31 Cutting blade 32 Side wall 321 Inner surface B Electric tool C Root D Hole E Seedling

Claims (4)

A drilling tool for planting to provide a hole in the ground for planting seedlings such as trees and plants,
A rotating shaft that can be rotated by human power or driving force from an electric tool;
A spiral wing that is provided on the outer periphery of the rotating shaft to excavate and remove earth and sand upward;
A hole saw that cuts the outer periphery of the ground by rotation by the rotating shaft,
Having at least
The cutting blade provided on the lower edge of the hole saw is located below the lowest end of the spiral blade,
Drilling tool for planting. The side wall of the hole saw is joined to the side edge of the spiral wing,
The planting punch according to claim 1. The tip of the rotating shaft is located below the cutting blade,
The planting punch according to claim 1 or 2. The rotary shaft is configured to be detachable from an electric tool,
The planting punch according to any one of claims 1 to 3.

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