JP2009024331A - Hand drill - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of being troubled by a spiral blade tip which does not easily bite into the ground depending on soil although a preparatory hole is conventionally bored using a drill with a handle mounted in T-shape to one end of a shaft body and with a spiral blade wound around the other end of the shaft body, when erecting a pile in a field or the like. <P>SOLUTION: This drill having a handle 2 at one end of a shaft body 1 and a spiral blade 4 wound around the other end of the shaft body 1 has a locking body 6 mounted in a rotatable and vertically movable manner to the shaft body 1, and a treadle body 7 protrusively provided at the locking body 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、穴掘り具に関し、地上に杭や支柱を立設する際の予備穴を掘る手動式の穴掘り具に関する。   The present invention relates to a hole digging tool, and relates to a manual type digging tool for digging a preliminary hole when a pile or a column is erected on the ground.

従来、圃場などにビニールハウスを設置するなど様々な局面で地面に杭を立設するときは、杭を立設する位置にＴ字型の穴掘り具を使って予備穴を掘ることが多かった。このＴ字型の穴掘り具は、軸本体の上端にハンドルが取付けられ、この軸本体の下端に螺旋羽根が巻着された穴掘り具であり、上端のハンドルを両手で握り、体重をかけて軸本体を回転させていたが、土質次第で穿孔螺旋の先端が地面に食い込まず難渋していた。特に、軸本体下端の螺旋羽根の径が大きな穴掘り具は、ハンドルに体重をかけた程度では、螺旋羽根の先端が容易に地面に食い込みつらかった。   Conventionally, when piles are erected on the ground in various situations such as installing a greenhouse in a farm, etc., there are many cases where a spare hole is dug using a T-shaped digging tool at the position where the pile is erected. . This T-shaped drilling tool is a drilling tool with a handle attached to the upper end of the shaft body, and a spiral blade wrapped around the lower end of the shaft body. The shaft itself was rotating, but depending on the soil, the tip of the drilling spiral did not bite into the ground, making it difficult. In particular, in the drilling tool having a large diameter spiral blade at the lower end of the shaft body, the tip of the spiral blade easily bites into the ground when the weight is applied to the handle.

上記問題を解決するものとして特許文献１（特開平１１−３０３１１８号）の「測量杭穴掘り具」があった。この特許文献１の「測量杭穴掘り具」は、軸棒の先端部を細長い円錐形の差込軸体とし、差込軸体の外周に小型のねじ山からなる先導螺旋を巻着あるいは形成し、差込軸体に続く軸棒の外周に大型の穿孔螺旋を巻着していた。しかしながら、この「測量杭穴掘り具」は、直径が５ないし１０ｃｍ程度の小孔を掘るためのものであったが、先導螺旋のねじ山が小さく、穴を掘る場所の土質が軟弱な土質であったり、粘土質のような粘り気の多い土質の場合に先導螺旋に土が絡みつき目詰まりを起し、単に先導螺旋状の穴が地上に開くのみで、先導螺旋本来の機能を果たせなかった。
特開平１１−３０３１１８号文献 As a means for solving the above problem, there is a “surveying pile digging tool” disclosed in Japanese Patent Application Laid-Open No. 11-303118. In this "Surveying pile drilling tool" of Patent Document 1, the tip of the shaft rod is an elongated conical insertion shaft body, and a leading spiral made of a small thread is wound or formed on the outer periphery of the insertion shaft body. In addition, a large perforated spiral was wound around the outer periphery of the shaft rod following the plug-in shaft body. However, this “surveying pile drilling tool” was for digging a small hole with a diameter of about 5 to 10 cm. However, the thread of the leading spiral is small, and the soil where the hole is dug is soft. In the case of sticky soils such as clay, soil entangled with the leading spiral and clogged, and the leading spiral hole just opened on the ground, and the original function of the leading spiral could not be performed.
Japanese Patent Laid-Open No. 11-303118

本発明は、土質が硬かったり、軟弱であっても、地面に螺旋羽根の先端が容易に食い込み易い穴掘り具を提供することを目的としている。   An object of the present invention is to provide a digging tool in which the tip of a spiral blade can easily bite into the ground even if the soil is hard or soft.

上記の目的を達成するために本発明の請求項１に記載の穴掘り具は、軸本体の一端にハンドルを有し、該軸本体の他端に螺旋羽根が巻着された穴掘り具であって、該軸本体に回転可能かつ上下動可能に取付けられた係止体と、該係止体に突設した足踏体と、を有することを特徴とする。   In order to achieve the above object, a drilling tool according to claim 1 of the present invention is a drilling tool having a handle at one end of a shaft body and a spiral blade wound around the other end of the shaft body. And a locking body attached to the shaft main body so as to be rotatable and vertically movable, and a foot pedal projecting from the locking body.

本発明の請求項２に記載の穴掘り具は、前記ハンドルが、軸本体の一端に着脱自在に取付けられ、前記係止体が、該軸本体に外挿された筒体であり、前記足踏体が、棒状あるいはクランク状の突起であることを特徴とする。   According to a second aspect of the present invention, in the drilling tool, the handle is detachably attached to one end of the shaft main body, and the locking body is a cylindrical body extrapolated to the shaft main body. The step body is a rod-like or crank-like protrusion.

本発明の穴掘り具は、本体の一端にハンドルを有し、この軸本体の他端に螺旋羽根が巻着され、軸本体に筒体である係止体が回転可能かつ上下動可能に取付けられており、係止体には棒状あるいはクランク状の突起である足踏体が取付けられている。この穴掘り具のハンドルを両手で握り、他端を地上の所望の位置に挿し込み、係止体に足を乗せて下方に押込むと、土質が硬くとも、軟弱な土質であっても螺旋羽根の先端を地中に確実に食い込ませることができる。螺旋羽根の先端が地中に確実に食い込んだ状態でハンドルを下方に押圧しながら回転させると、螺旋羽根と軸本体が回転しながら地中に深く進入すなわち螺進される。この様に螺旋羽根と軸本体が回転しているとき、係止体の足踏体から足を外しておけば、地上に当接している回転可能かつ上下動可能に取付けられた係止体が、軸本体に沿って穴掘り具の一端のハンドル方向に摺動するから穴掘り作業の障害にならない。所望の深さまで螺旋羽が土中に侵入した状態で土とともに螺旋羽根を引き抜くと螺旋羽根の外形状の穴が掘れる。   The drilling tool of the present invention has a handle at one end of the main body, a spiral blade is wound around the other end of the shaft main body, and a locking body which is a cylindrical body is attached to the shaft main body so as to be rotatable and vertically movable. The foot body, which is a rod-shaped or crank-shaped projection, is attached to the locking body. Hold the handle of this drilling tool with both hands, insert the other end into the desired position on the ground, put your foot on the locking body and push it down, even if the soil is hard, even if it is soft soil The tip of the blade can be surely cut into the ground. If the handle is rotated while pressing the handle downward with the tip of the spiral blade securely biting into the ground, the spiral blade and the shaft body rotate deeply into the ground, that is, screwed. In this way, when the spiral blade and the shaft body are rotating, if the foot is removed from the foot of the locking body, the locking body that is in contact with the ground and that can be rotated and moved up and down can be obtained. Since it slides in the handle direction at one end of the drilling tool along the shaft body, it does not become an obstacle to the drilling operation. When the spiral blade is pulled out together with the soil while the spiral blade has penetrated into the soil to a desired depth, a hole having an outer shape of the spiral blade is dug.

図１の斜視図および図２の要部拡大断面図により本発明の穴掘り具を説明する。軸本体１を形成し、この軸本体１の一端に軸本体１の軸心と直交する方向のハンドル２を取付ける。このハンドル２の央部には突起２ａが垂下され、この突起２ａを管からなる軸本体１の一端に嵌め込みボルト３ａ・ナット３ｂにより着脱可能に取付ける。この軸本体１の他端の外周に螺旋羽根４を巻きつける。この隣接する螺旋羽根４の外周に、縦方向に延びる２本の棒状の土切刃５を取付ける。以上の構成の穴あけ具の軸本体１に、係止体６としての筒体を外挿する。この係止体６は、軸本体１を軸として回転可能でありかつ軸本体１に沿って上下動可能すなわち摺動自在となっている。この係止体６にクランク状（あるいは棒状）の足踏体７を突設する。螺旋羽根４の上端近くの軸本体１の外周には、環状のストッパー８が取付けられ、これ以上係止体６が下方に下がって螺旋羽根４を損傷することがないようになっている。このストッパー８の大きさは、螺旋羽根４の外形より小さくつくられ、足踏体７がこれ以上軸本体１の下方に下がって螺旋羽根４を損傷しなければ、いかなる形状であってもよい。なお、係止体６の形状や軸本体１への取付け方、あるいは足踏体７の形状は、図示したものに限定されず、例えば、筒状の係止体の外周にフランジ状突起を突設することもできる。   The drilling tool of the present invention will be described with reference to the perspective view of FIG. 1 and the enlarged sectional view of the main part of FIG. A shaft body 1 is formed, and a handle 2 in a direction perpendicular to the axis of the shaft body 1 is attached to one end of the shaft body 1. A projection 2a hangs down from the center of the handle 2, and this projection 2a is fitted to one end of a shaft body 1 made of a pipe and is detachably attached by bolts 3a and nuts 3b. A spiral blade 4 is wound around the outer periphery of the other end of the shaft body 1. Two rod-shaped earth cutting blades 5 extending in the vertical direction are attached to the outer periphery of the adjacent spiral blade 4. A cylindrical body as a locking body 6 is extrapolated to the shaft body 1 of the drilling tool having the above configuration. The locking body 6 can be rotated about the shaft body 1 and can move up and down along the shaft body 1, that is, can slide. A crank-shaped (or rod-shaped) foot pedal body 7 is projected from the locking body 6. An annular stopper 8 is attached to the outer periphery of the shaft body 1 near the upper end of the spiral blade 4 so that the locking body 6 does not fall further and damage the spiral blade 4. The size of the stopper 8 is smaller than the outer shape of the spiral blade 4, and may have any shape as long as the foot 7 is not lowered below the shaft body 1 to damage the spiral blade 4. Note that the shape of the locking body 6, how to attach to the shaft body 1, or the shape of the foot pedal body 7 is not limited to the illustrated one. For example, a flange-shaped protrusion protrudes from the outer periphery of the cylindrical locking body. It can also be set up.

上記構成の穴掘り具は、この穴掘り具のハンドル２を両手で握り、他端を地上の所望の位置に挿し込み、足踏体７に足を乗せて下方に押込むと、螺旋羽根４の先端が地上に確実に食い込む。螺旋羽根４の先端が地上に確実に食い込んだ状態でハンドル２を下方に押圧しながら回転させると、螺旋羽根４と軸本体１が回転しながら地中に深く進入すなわち螺進される。この様に螺旋羽根４と軸本体１が回転しているとき、係止体６の足踏体７から足を外しておけば、地上に当接している回転可能かつ上下動可能に取付けられた係止体６が軸本体１に沿って穴掘り具の一端のハンドル２方向に摺動するから穴掘り作業の障害にならない。   In the drilling tool having the above-described configuration, when the handle 2 of this drilling tool is grasped with both hands, the other end is inserted into a desired position on the ground, and the foot is placed on the foot pedal 7 and pushed downward, the spiral blade 4 The tip of the bite surely cuts into the ground. When the handle 2 is rotated while being pressed downward with the tip of the spiral blade 4 securely biting into the ground, the spiral blade 4 and the shaft body 1 are rotated deeply into the ground, that is, screwed. In this way, when the spiral blade 4 and the shaft body 1 are rotating, if the foot is removed from the foot 7 of the locking body 6, it can be attached to the ground so that it can rotate and move up and down. Since the locking body 6 slides along the shaft body 1 in the direction of the handle 2 at one end of the drilling tool, the drilling operation is not hindered.

本発明の螺旋杭立設具は、上述の実施の形態に限定されるものではなく、特に、軸本体に外挿された係止体と係止体に突設された足踏体の形状と取付け方については、実施の形態に限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることもできる。   The spiral pile erection tool of the present invention is not limited to the above-described embodiment, and in particular, the shape of the stepped body protruding from the locking body and the locking body that is extrapolated to the shaft body and how to attach it Is not limited to the embodiment, and various modifications can be made without departing from the scope of the present invention.

本発明の穴掘り具は、圃場などで杭を立設する予備穴を掘るとき、特に、径が１０ｃｍを超える大径の穴を掘るときに役立つ。   The digging tool of the present invention is useful when digging a spare hole for standing a pile in a farm field or the like, particularly when digging a large-diameter hole having a diameter exceeding 10 cm.

本発明の穴掘り具を示す斜視図である。It is a perspective view which shows the digging tool of this invention. 図１の係止体の部分を示す要部拡大断面図である。It is a principal part expanded sectional view which shows the part of the latching body of FIG.

符号の説明Explanation of symbols

１ 軸本体
２ ハンドル
２ａ 突起
３ａ ボルト
３ｂ ナット
４ 螺旋羽根
５ 土切刃
６ 係止体としての筒体
７ クランク状（あるいは棒状）の足踏体
８ 環状のストッパー DESCRIPTION OF SYMBOLS 1 Shaft body 2 Handle 2a Protrusion 3a Bolt 3b Nut 4 Spiral blade 5 Earth cutting blade 6 Cylindrical body as a locking body 7 Crank-shaped (or rod-shaped) footrest 8 Annular stopper

Claims (2)

軸本体の一端にハンドルを有し、該軸本体の他端に螺旋羽根が巻着された穴掘り具であって、
該軸本体に回転可能かつ上下動可能に取付けられた係止体と、
該係止体に突設した足踏体と、
を有することを特徴とする穴掘り具。 A drilling tool having a handle at one end of the shaft body, and a spiral blade wound around the other end of the shaft body,
A locking body attached to the shaft body so as to be rotatable and vertically movable;
A foot pedal projecting from the locking body;
A drilling tool characterized by comprising: 前記ハンドルが、軸本体の一端に着脱自在に取付けられ、
前記係止体が、該軸本体に外挿された筒体であり、
前記足踏体が、棒状あるいはクランク状の突起であることを特徴とする請求項１に記載の穴掘り具。 The handle is detachably attached to one end of the shaft body,
The locking body is a cylindrical body extrapolated to the shaft body;
The digging tool according to claim 1, wherein the foot pedal is a rod-shaped or crank-shaped protrusion.

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