JP4079889B2

JP4079889B2 - Removable anchor anchor

Info

Publication number: JP4079889B2
Application number: JP2004008997A
Authority: JP
Inventors: ビョンークパク
Original assignee: 野崎力; 福来治
Priority date: 2004-01-16
Filing date: 2004-01-16
Publication date: 2008-04-23
Anticipated expiration: 2024-01-16
Also published as: JP2005200952A

Description

本発明は、除去式アンカーの定着具に関するものである。
The present invention relates to a fixing device for a removable anchor.

除去式アンカーとは、アンカーの使用目的が達成された後に、不要となったアンカーの定着具や鋼線を地中から除去するアンカーである。
そのために従来の除去式アンカーは、樹脂で被覆した鋼線を地中の最深部でＵ字状に折り返して設置し、除去時には鋼線の一端を引き出すことによって除去するものが知られている。（例えば特許文献１の図１参照）
特開平５−２９５７２９号公報 A removable anchor is an anchor that removes anchor anchors and steel wires that are no longer needed from the ground after the purpose of use of the anchor has been achieved.
For this purpose, there is known a conventional removable anchor in which a steel wire coated with a resin is folded in a U shape at the deepest part in the ground and removed by pulling out one end of the steel wire at the time of removal. (For example, see FIG. 1 of Patent Document 1)
JP-A-5-295729

前記した従来の除去式アンカーにあっては、次のような問題点がある。
＜イ＞削孔した孔内で鋼線をＵ字状に折り曲げるのであるから、折り曲げ部分には大きな変形外力が作用し、強度が低下する。
＜ロ＞最深部で急な角度で折り曲げた鋼線を引き抜く構成であるため、折り曲げ部が大きな抵抗となり、相当に大きな力を与えないと引き抜くことができない。
＜ハ＞大きな力を与えないと引き抜くことができないから、引き抜きのために機械が必要となる。機械で引き抜くためには、機械を据え付ける用地、機械が移動する用地が必要となり、狭い現場では問題が多い。
＜ニ＞直径の太い鋼線はＵ字状に折り返すことができないために、細い鋼線を多数本使用する必要がある。そのために、削孔の直径が大きくなり、あるいは多数本の削孔が必要となり、削孔手間、費用が増大する。
＜ホ＞引き抜きができるように、鋼線はその周囲を樹脂のパイプで被覆し、鋼線の周囲には油脂を塗布してある。そのために引き抜いた鋼線は油脂でまみれており、作業場所が油脂で汚れやすい。また引き抜いて回収した鋼線は油脂でまみれているから再利用できないことはもちろん、廃棄にも特別な配慮が必要となる。
＜ヘ＞鋼線を除去した後にも地中には樹脂のパイプと大量の油脂が残ることになる。そのために長年の間に地中に油脂分が滲出して、地盤や地下水を汚染させる可能性もある。
The conventional removable anchor described above has the following problems.
 Since the steel wire is bent into a U shape within the drilled hole, a large deformation external force acts on the bent portion, and the strength is reduced.
 Since the steel wire bent at a steep angle in the deepest part is pulled out, the bent part becomes a large resistance and cannot be pulled out unless a considerable force is applied.
<C> Since a machine cannot be pulled out unless a large force is applied, a machine is required to pull it out. In order to pull out by a machine, a site for installing the machine and a site for moving the machine are necessary, and there are many problems in a small site.
<D> Since a steel wire with a large diameter cannot be folded back into a U shape, it is necessary to use a large number of thin steel wires. Therefore, the diameter of the hole is increased or a large number of holes are required, which increases the labor and cost of the hole.
<E> The steel wire is covered with a resin pipe so that it can be pulled out, and oil and fat are applied around the steel wire. Therefore, the drawn steel wire is covered with oil and fat, and the work place is easily contaminated with oil and fat. In addition, the steel wire pulled out and collected is covered with oil and fat, so it cannot be reused, and special consideration is required for disposal.
<F> Resin pipes and a large amount of oil and fat remain in the ground even after the steel wire is removed. For this reason, fats and oils may ooze out into the ground for many years and may contaminate the ground and groundwater.

上記のような課題を解決するために、本発明の除去式アンカーの定着具は、削孔した孔の内部に挿入するアンカー鋼線の定着具であって、鋼線の地中側の端末を収納する定着外筒を備え、この外筒の内面には、孔の孔底側にはピン係合溝を形成し、孔口側には、孔の孔底側に向けて内径の拡大するクサビ台を形成し、外筒の内部には、複数枚に分割したクサビ片と、クサビ片群を孔の孔底側で支持し、かつ、内壁に沿ってその内部を摺動可能な円柱体である支持部材を収納し、支持部材には押し出しバネによって孔口側への押し出し力を与え、かつ支持部材には、外筒の内面へ向けて押し出し可能なピンを収納し、クサビ片とクサビ台の間には、介在部材を配置し、鋼線の孔外の露出部分を切断することによって、それまで加わっていた鋼線の緊張力を開放し、その力を鋼線の孔底側の末端を介して支持部材を孔口側から孔底側へ押し戻す力として作用させ、支持部材を加圧している押し出しバネの弾性を、この押し戻し力よりも小さく設定して、支持部材を孔底側へスライドさせ、支持部材が一定距離だけ移動してピンが係合溝に落ち込むことによって外筒内面の係合溝に係合させて、以前の位置まで再度復帰することが不可能となるように構成したことを特徴としたものである。 In order to solve the above-described problems, a fixing anchor fixing tool according to the present invention is an anchor steel wire fixing tool that is inserted into a drilled hole. A fixing outer cylinder is provided, and a pin engaging groove is formed on the bottom side of the hole on the inner surface of the outer cylinder, and a wedge having an inner diameter increasing toward the bottom side of the hole on the hole mouth side. The outer cylinder is formed of a cylindrical piece that supports a wedge piece divided into a plurality of pieces and a wedge piece group on the bottom side of the hole and that can slide along the inner wall. A supporting member is accommodated, and a pushing force is applied to the supporting member by a pushing spring toward the hole opening side, and a pin that can be pushed out toward the inner surface of the outer cylinder is accommodated in the supporting member. between the interposed member disposed by cutting the exposed portion of the outer holes of the steel wire, steel wire that has been applied until then The tension force is released, the force acts as a force to push the support member back from the hole mouth side to the hole bottom side via the end of the hole bottom side of the steel wire, and the elasticity of the push spring that pressurizes the support member is Set smaller than this pushing back force, slide the support member toward the bottom of the hole, move the support member by a certain distance, and the pin falls into the engagement groove to engage with the engagement groove on the inner surface of the outer cylinder. In this configuration, it is impossible to return to the previous position again .

本発明の除去式アンカーの定着具は以上の手段よりなるから次のような効果を得ることができる。
＜イ＞従来のように狭い孔内で鋼線をＵ字状に折り曲げることがなく、直線状態で鋼線を使用するから、強度が低下することがない。
＜ロ＞鋼線を直線状態で使用するから、従来のＵ字状のアンカーと異なり、大きな抵抗部分が存在しない。そのために長い鋼線であっても人力によって容易に引き抜くことができる。
＜ハ＞引き抜きに大きな力が不要であるから、引き抜きのための機械が不要であり、機械を据え付ける用地、機械が移動する用地が不要で、狭い現場や足場の悪い現場でも容易に引抜作業を行うことができる。
＜ニ＞太い鋼線は小さい直径でＵ字状に折り返すことができないが、本発明ではそのような必要がないから、直径の太い鋼線をアンカーとして使用することができる。そのために、多数本の削孔の必要がなく、削孔手間、費用を大幅に削減することができる。
＜ホ＞鋼線の末端に抵抗がなくなるから、鋼線の周囲に樹脂を介在させて被覆する必要がない。そのために引き抜いた鋼線にはまったく油脂が付着していないから、作業環境が良好であり、引き抜いて回収した鋼線も再利用することができる。
＜ヘ＞従来のこの種の定着具の多くが油脂を使用しているが、本発明の定着具は油脂を使用していないから、地中に油脂が残ることがなく、地盤や地下水を汚染させる可能性がない。
＜ト＞クサビ片２Ａとクサビ台２Ｂとの間には介在部材５が配置してある。そのために鋼製のクサビ片２Ａが鋼製のクサビ台２Ｂに食い込むことがなく、両者は容易に離反して孔底側へスライドする。その結果、クサビ片２Ａと、クサビ台２Ｂの間隔が開き、クサビ片２Ａ群には鋼線４を把持している把持力が消滅し、鋼線を確実に定着状態から開放することができる。
Since the fixing device for the removable anchor of the present invention comprises the above means, the following effects can be obtained.
 Since the steel wire is used in a straight state without bending the steel wire into a U-shape in a narrow hole as in the prior art, the strength does not decrease.
 Since the steel wire is used in a straight state, unlike a conventional U-shaped anchor, there is no large resistance portion. Therefore, even a long steel wire can be easily pulled out by human power.
<C> Since a large force is not required for extraction, there is no need for a machine for extraction, no site for installing the machine or a site for moving the machine, and it is easy to perform the extraction work even in a small site or a site with poor scaffolding. It can be carried out.
<D> Although a thick steel wire cannot be folded back into a U-shape with a small diameter, in the present invention, such a need is not required, so a steel wire with a large diameter can be used as an anchor. Therefore, there is no need for a large number of holes, and the labor and cost of the holes can be greatly reduced.
<E> Since there is no resistance at the end of the steel wire, there is no need to cover the steel wire with a resin interposed. Therefore, since the oil and fat are not attached to the drawn steel wire at all, the working environment is good, and the drawn and collected steel wire can be reused.
<F> Many conventional fixing devices of this type use oils and fats, but the fixing devices of the present invention do not use oils and fats, so there is no oil remaining in the ground, and soil and groundwater are contaminated. There is no possibility to make it.
<G> The interposition member 5 is disposed between the wedge piece 2A and the wedge base 2B. Therefore, the steel wedge piece 2A does not bite into the steel wedge base 2B, and both of them easily separate and slide toward the bottom of the hole. As a result, the gap between the wedge piece 2A and the wedge base 2B is opened, and the gripping force holding the steel wire 4 disappears in the wedge piece 2A group, and the steel wire can be reliably released from the fixed state.

本発明を実施するための最良の形態は、削孔した孔の内部に挿入するアンカー鋼線の定着具であって、鋼線の地中側の端末を収納する定着外筒を備え、この外筒の内面には、孔の孔底側に係合部を、孔口側には、孔の孔底側に向けて内径の拡大するクサビ台を形成し、外筒の内部には、複数枚に分割したクサビ片と、クサビ片群を孔の孔底側で支持する支持部材を収納し、クサビ片とクサビ台の間には、介在部材を配置し、支持部材には、孔口側への押し出し力を与え、支持部材が、孔の孔底側へ押し戻された場合に、外筒内面の係合部と、支持部材が係合するように構成した、除去式アンカーの定着具である。
The best mode for carrying out the present invention is an anchor steel wire fixing tool that is inserted into a drilled hole, and includes a fixing outer cylinder that houses a terminal on the underground side of the steel wire. On the inner surface of the cylinder, an engagement portion is formed on the hole bottom side of the hole, and on the hole side, a wedge base having an inner diameter increasing toward the hole bottom side of the hole is formed. A wedge member divided into two pieces and a support member for supporting the wedge piece group on the hole bottom side of the hole are accommodated, and an interposition member is disposed between the wedge piece and the wedge base, and the support member has a hole opening side. This is a removable anchor fixing tool configured such that when the support member is pushed back to the hole bottom side of the hole, the engagement portion on the inner surface of the outer cylinder and the support member are engaged with each other. .

以下図面を参照しながら本発明の除去式アンカーの定着具の実施例について説明する。 Embodiments of a fixing device for a removable anchor of the present invention will be described below with reference to the drawings.

＜イ＞定着外筒。
本発明の定着具は、削孔した孔の内部に挿入してアンカー鋼線の端末を地中に定着する定着具である。
そして、鋼線の地中側の端末を収納する定着外筒１を備えている。
外筒１は、一方を開放した筒体であり、その内壁には把持機構と、係合機構を設ける。
実際には外筒１は孔口側に配置する孔口側外筒１Ａと、孔の孔底側に配置する孔底側外筒１Ｂとに分割する。そして両方の外筒はネジで分割、一体化が可能であるように構成する。
したがって、孔口側外筒１Ａは両端を開放した円筒状として、孔底側外筒１Ｂは一端を閉塞したコップ状の筒体として形成する。 <A> Fixing outer cylinder.
The fixing tool of the present invention is a fixing tool that is inserted into the drilled hole and fixes the end of the anchor steel wire in the ground.
And the fixing outer cylinder 1 which accommodates the terminal of the underground side of a steel wire is provided.
The outer cylinder 1 is a cylinder with one open, and a gripping mechanism and an engagement mechanism are provided on the inner wall thereof.
Actually, the outer cylinder 1 is divided into a hole-side outer cylinder 1A disposed on the hole-opening side and a hole-bottom-side outer cylinder 1B disposed on the hole-bottom side of the hole. Both outer cylinders are configured so that they can be divided and integrated with screws.
Therefore, the hole side outer cylinder 1A is formed as a cylindrical shape with both ends open, and the hole bottom side outer cylinder 1B is formed as a cup-shaped cylinder with one end closed.

＜ロ＞鋼線の把持機構。
孔口側外筒１Ａの内部には、把持機構を設け、この把持機構によって、鋼線を周囲から把持する。
把持機構として例えばクサビ機構を設ける。
そのために孔口側外筒１Ａの内面壁は、孔の孔底側に向けて内径の拡大するクサビ台２Ｂを形成する。
したがって孔口側外筒１Ａの内面は孔の孔底側に向けて内径の拡大する、ラッパ状の斜面として形成される。
一方、孔口側外筒１Ａの内部には、円筒をその中心線に並行に、複数枚に分割したクサビ片２Ａを収納する。
このクサビ片２Ａは、円弧状の板体であり、その内側面は円筒の中心軸に対して並行の曲面を形成し、その外側面は孔口側に向けて外径の縮小する形状に形成する。
そして、クサビ片２Ａの外側面と、クサビ台２Ｂの斜面とは面として接触するような角度に形成する。
そのために、複数のクサビ片２Ａが孔底側に位置する場合にはクサビ片２Ａ間の間隔が広がっており、クサビ片２Ａを孔口側へ押し出した時には、クサビ片２Ａはクサビ台２Ｂの斜面をスライドしつつその間隔が狭まって、最終的に内側面がほぼひとつの円筒を形成するように構成する。 Steel wire gripping mechanism.
A gripping mechanism is provided inside the hole side outer cylinder 1A, and the steel wire is gripped from the periphery by the gripping mechanism.
For example, a wedge mechanism is provided as a gripping mechanism.
For this purpose, the inner wall of the hole-side outer cylinder 1A forms a wedge base 2B whose inner diameter increases toward the hole bottom side of the hole.
Accordingly, the inner surface of the hole-side outer cylinder 1A is formed as a trumpet-shaped slope whose inner diameter increases toward the hole bottom side of the hole.
On the other hand, a wedge piece 2A obtained by dividing a cylinder into a plurality of pieces is accommodated inside the hole-side outer cylinder 1A in parallel with the center line thereof.
This wedge piece 2A is an arc-shaped plate body, its inner side surface forms a curved surface parallel to the central axis of the cylinder, and its outer side surface is formed in a shape whose outer diameter decreases toward the hole opening side. To do.
Then, the outer surface of the wedge piece 2A and the inclined surface of the wedge base 2B are formed at an angle so as to contact as a surface.
Therefore, when the plurality of wedge pieces 2A are located on the bottom side of the hole, the interval between the wedge pieces 2A is widened. When the wedge pieces 2A are pushed out to the hole opening side, the wedge pieces 2A are inclined surfaces of the wedge base 2B. The space is narrowed while sliding, and finally the inner surface forms a substantially single cylinder.

＜ハ＞介在部材。
後述するように、アンカー鋼線４の把握力は、アンカー鋼線４の緊張時に円弧状のクサビ片２Ａがラッパ状のクサビ台２Ｂに引きずり込まれることによって内径が収縮することによって発生する。
その際に、鋼製のクサビ片２Ａは大きな力で鋼製のクサビ台２Ｂに加圧され、クサビ台２Ｂに食い込んでしまう可能性がある。
そうなると、アンカー鋼線４の除去時にクサビ片２Ａをクサビ台２Ｂから離反させることが困難となる場合が予想される。クサビ片２Ａがクサビ台２Ｂから離反しないと、アンカー鋼線４の把持が開放されないから、アンカー鋼線４を引き抜くことができないことになってしまう。
このような問題の発生を避けるために、本発明の定着具においてはクサビ片２Ａとクサビ台２Ｂの間に、介在部材５を配置する。
この介在部材５は鋼製のクサビ片と鋼製のクサビ台の間に配置するもので、両者を直接接触加圧させることがなく、両者の強い食い込みの発生を回避できる部材であれば広く採用することができる。
介在部材５の配置は、例えばクサビ片２Ａの表面に介在部材５の層をコーティングする。
あるいは、クサビ台２Ｂ側の表面に、同様に介在部材５の層をコーティングする。
あるいは両者の間に介在部材５のシートを配置する。
あるいは接着剤を塗布したテープ状の介在部材５をクサビ片２Ａかクサビ台２Ｂに張り付ける。
介在部材５の一例として摩擦係数の小さい、低摩擦部材を介在させることができる。介在部材５を構成する低摩擦材としては、ＰＴＦＥ（ポリテトラフルオロエチレン）（テフロン(R)）に代表されるフッ素樹脂が一般的である。
しかしＰＴＦＥに限定されるものではなく、それ以外に、二硫化モリブデンを主剤に、潤滑ワックスとグラファイトを混合したＭＯＷＡＸ、二硫化モリブデン単体、グラファイト単体、ＰＴＦＥに黒鉛を混合したもの、低摩擦セラミックス、Ａｌ−Ｓｉ合金含浸グラファイト複合材、ＭＣナイロン、ダイヤモンドカーボンア（ＤＬＣ）膜、炭窒化ホウ素（ＢＣＮ）膜、その他の本件出願時に公知の低摩擦材を選択して使用することができる。 <C> Intervening member.
As will be described later, the gripping force of the anchor steel wire 4 is generated when the inner diameter contracts due to the arc-shaped wedge piece 2A being dragged into the trumpet-shaped wedge base 2B when the anchor steel wire 4 is tensioned.
At that time, there is a possibility that the steel wedge piece 2A is pressed against the steel wedge base 2B with a large force and bites into the wedge base 2B.
If so, it may be difficult to separate the wedge piece 2A from the wedge base 2B when the anchor steel wire 4 is removed. If the wedge piece 2A is not separated from the wedge stand 2B, the anchor steel wire 4 cannot be pulled out because the gripping of the anchor steel wire 4 is not released.
In order to avoid such a problem, the interposing member 5 is disposed between the wedge piece 2A and the wedge base 2B in the fixing device of the present invention.
This interposition member 5 is disposed between the steel wedge piece and the steel wedge base, and is widely used as long as it is a member that does not directly contact and press both of them and can avoid the occurrence of strong biting between them. can do.
For example, the interposition member 5 is coated with a layer of the interposition member 5 on the surface of the wedge piece 2A.
Or the layer of the interposed member 5 is similarly coated on the surface on the wedge base 2B side.
Or the sheet | seat of the interposed member 5 is arrange | positioned between both.
Alternatively, the tape-like interposition member 5 coated with an adhesive is attached to the wedge piece 2A or the wedge base 2B.
As an example of the interposition member 5, a low friction member having a small friction coefficient can be interposed. As the low friction material constituting the interposition member 5, a fluororesin represented by PTFE (polytetrafluoroethylene) (Teflon (R)) is generally used.
However, it is not limited to PTFE. Besides that, MOWAX in which molybdenum disulfide is the main ingredient, lubricating wax and graphite are mixed, molybdenum disulfide alone, graphite alone, PTFE mixed with graphite, low friction ceramics, Al-Si alloy-impregnated graphite composite, MC nylon, diamond carbon (DLC) film, boron carbonitride (BCN) film, and other low friction materials known at the time of filing this application can be selected and used.

＜ニ＞支持部材。
孔底側外筒１Ｂの内部には、クサビ片２Ａ群を孔の孔底側で支持する支持部材３を収納する。
この支持部材３は、孔底側外筒１Ｂの内壁に沿ってその内部を摺動可能な円柱体であり、支持部材３には押し出しバネ３１によって孔口側への押し出し力を与えておく。
さらに図４に示すように、支持部材３の孔口側にはクサビ片係止溝３２を凹設する。
一方、クサビ片２Ａの孔底側には係止棚３３を形成し、この係止棚３３を支持部材３の係止溝３２に係合できるように構成する。 <D> Support member.
The support member 3 that supports the wedge piece 2A group on the hole bottom side of the hole is accommodated inside the hole bottom outer cylinder 1B.
The support member 3 is a cylindrical body that can slide along the inner wall of the hole bottom-side outer cylinder 1B. The support member 3 is given a pushing force toward the hole opening side by a pushing spring 31.
Further, as shown in FIG. 4, a wedge piece locking groove 32 is provided in the hole side of the support member 3.
On the other hand, a locking shelf 33 is formed on the bottom side of the wedge piece 2 A, and the locking shelf 33 can be engaged with the locking groove 32 of the support member 3.

＜ホ＞係合機構。
支持部材３は、係合機構を介して、孔底側外筒１Ｂと係合可能である。
係合機構として例えば支持部材３から、孔底側外筒１Ｂの内壁に向けて突出する弾力を与えた係合ピン３４によって構成する。
そのために支持部材３には内壁に向けた収納穴を形成し、収納穴にはピン３４とばねを収納する。
一方、孔底側外筒１Ｂの内壁には、ピン係合溝３５を刻設する。
したがって、押し出しバネ３１によって孔口側へ押し出されている支持部材３が、一定の距離だけ孔底側へ移動すると、ピン３４が内壁のピン係合溝３５内に落ち込む。その結果、支持部材３の孔口側への押し戻しは阻止される。
なお、係合機構はピン３４とピン係合溝３５との組み合わせに限定されることなく、バネ板の溝への落とし込みや、外筒側から支持部材３への係合部材の突出など、一方向へのスライドは許容するが、後退は阻止されるような、公知の逆止め機構を広く採用することができる。 <E> Engagement mechanism.
The support member 3 can be engaged with the hole bottom side outer cylinder 1B via an engagement mechanism.
For example, the engaging mechanism is constituted by an engaging pin 34 provided with an elastic force protruding from the support member 3 toward the inner wall of the hole bottom outer cylinder 1B.
For this purpose, the support member 3 is formed with a storage hole directed toward the inner wall, and the pin 34 and the spring are stored in the storage hole.
On the other hand, a pin engagement groove 35 is formed on the inner wall of the hole bottom side outer cylinder 1B.
Therefore, when the support member 3 pushed to the hole opening side by the pushing spring 31 moves to the hole bottom side by a certain distance, the pin 34 falls into the pin engaging groove 35 on the inner wall. As a result, the support member 3 is prevented from being pushed back to the hole side.
Note that the engagement mechanism is not limited to the combination of the pin 34 and the pin engagement groove 35, and may be one of dropping the spring plate into the groove and projecting the engagement member from the outer cylinder side to the support member 3. A known check mechanism that allows sliding in the direction but prevents retraction can be widely adopted.

＜ヘ＞定着時の構成。（図２）
孔口側外筒１Ａと、孔底側外筒１Ｂとを分離し、鋼線４の地中側の端末を円筒状の孔口側外筒１Ａの内部を通して孔底側外筒１Ｂの内部に挿入する。
鋼線４が、周囲に注入するモルタルで固着されることがないように、その周囲は合成樹脂被覆４１で被覆しておき、その端末部分だけに鋼線４を露出しておく。ただし、後述するように鋼線４の引き抜き時にも引き抜きの抵抗がほとんどないから、従来のように鋼線４と周囲の被覆４１との間に油脂を介在させる必要がない。
こうして露出させた鋼線４の端末を、クサビ片２Ａ群で囲まれた空間を通って、支持部材３に当接する位置まで挿入する。
次に両外筒を一体化するためにネジを介して外筒を回転させると、クサビ台２Ｂが孔底側へ移動し、分割して配置してあったクサビ片２Ａ群を絞ることになり、鋼線４はクサビ片２Ａ群によって周囲から締め付けられて把持されて定着される。
この際に、クサビ片２Ａとクサビ台２Ｂとの間には、介在部材５が介在している。
外筒を定着した鋼線４には、別に用意した耐荷体を取り付け、削孔した孔内に挿入し、モルタルを注入して定着し、その後孔外からジャッキで鋼線４に引張力を与えて緊張するが、このアンカー設置工程は従来公知の各種の方法を採用することができる。 <F> Configuration at the time of fixing. (Figure 2)
The hole-side outer cylinder 1A and the hole-bottom-side outer cylinder 1B are separated, and the underground end of the steel wire 4 is passed through the inside of the cylindrical hole-side outer cylinder 1A into the hole-bottom-side outer cylinder 1B. insert.
The periphery of the steel wire 4 is covered with a synthetic resin coating 41 so that the steel wire 4 is not fixed by the mortar injected into the periphery, and the steel wire 4 is exposed only at the terminal portion. However, as will be described later, there is almost no resistance to drawing even when the steel wire 4 is drawn, so that it is not necessary to interpose oil and fat between the steel wire 4 and the surrounding coating 41 as in the prior art.
The end of the steel wire 4 thus exposed is inserted through the space surrounded by the wedge pieces 2 A to a position where it contacts the support member 3.
Next, when the outer cylinder is rotated via a screw to integrate both outer cylinders, the wedge base 2B moves to the bottom side of the hole, and the wedge pieces 2A group that has been divided and arranged are narrowed down. The steel wire 4 is clamped and fixed from the periphery by the wedge pieces 2A.
At this time, the interposition member 5 is interposed between the wedge piece 2A and the wedge base 2B.
A separately prepared load-bearing body is attached to the steel wire 4 to which the outer cylinder has been fixed, inserted into the drilled hole, fixed by injecting mortar, and then a tensile force is applied to the steel wire 4 with a jack from outside the hole. However, the anchor installation process can employ various conventionally known methods.

＜ト＞鋼線４の除去時。（図３）
アンカーとしての用途が終了したら、鋼線４を地中から除去する。
そのために、鋼線４の孔外の露出部分を切断する。
するとそれまで加わっていた鋼線４の緊張力が開放され、その力が鋼線４の孔底側の末端を介して支持部材３を孔口側から孔底側へ押し戻す力として作用する。
なお、鋼線４を介した孔底側への押し戻し力が不足している場合には、鋼線４の外側端をハンマーで打撃することによっても同様の押し戻し力を得ることができる。
支持部材３を加圧している押し出しバネ３１の弾性を、この押し戻し力よりも小さく設定しておけば、支持部材３は孔底側へスライドする。
すると、支持部材３は係合機構によって外筒に係合してしまい、以前の位置まで再度復帰することが不可能となる。
支持部材３のスライドによって、これに取り付けてあるクサビ片２Ａも孔底側へスライドする。
この場合に、鋼製のクサビ片２Ａと鋼製のクサビ台２Ｂとの間には介在部材５が介在している。したがってクサビ片２Ａはクサビ台２Ｂに強固に食い込むことがなく、クサビ台２Ｂから容易に離反して孔底側へスライドする。
その結果、クサビ片２Ａと、クサビ台２Ｂの間隔が開き、クサビ片２Ａ群には鋼線４を把持している把持力が消滅し、鋼線４は定着から開放される。
孔底側の端の把持力が開放されると、鋼線４に作用している外力はなくなるから、鋼線４は孔外から人力によって容易に引き出すことができる。
こうして地中からの鋼線４の除去が完了する。
<G> When removing the steel wire 4. (Figure 3)
When the use as an anchor is completed, the steel wire 4 is removed from the ground.
Therefore, the exposed part outside the hole of the steel wire 4 is cut.
Then, the tension force of the steel wire 4 applied so far is released, and the force acts as a force for pushing the support member 3 back from the hole opening side to the hole bottom side via the end of the hole bottom side of the steel wire 4.
In addition, when the pushing back force to the hole bottom side through the steel wire 4 is insufficient, the same pushing back force can be obtained by hitting the outer end of the steel wire 4 with a hammer.
If the elasticity of the pushing spring 31 that pressurizes the supporting member 3 is set to be smaller than the pushing back force, the supporting member 3 slides toward the bottom of the hole.
Then, the support member 3 is engaged with the outer cylinder by the engagement mechanism, and cannot be returned to the previous position again.
As the support member 3 slides, the wedge piece 2A attached thereto also slides toward the bottom of the hole.
In this case, the interposition member 5 is interposed between the steel wedge 2A and the steel wedge 2B. Therefore, the wedge piece 2A does not dig into the wedge base 2B firmly and slides away from the wedge base 2B toward the bottom of the hole.
As a result, the distance between the wedge piece 2A and the wedge base 2B is increased, the gripping force holding the steel wire 4 disappears in the wedge piece 2A group, and the steel wire 4 is released from fixing.
When the gripping force at the end on the hole bottom side is released, the external force acting on the steel wire 4 disappears, so the steel wire 4 can be easily pulled out of the hole by human power.
Thus, the removal of the steel wire 4 from the ground is completed.

本発明の除去式アンカーの定着具の把持機構と係合機構の実施例の一部を切断した状態の説明図。Explanatory drawing of the state which cut | disconnected a part of Example of the holding | grip mechanism and engagement mechanism of the fixing tool of the removable anchor of this invention. 定着具で鋼線を把持した状態の断面図。Sectional drawing of the state which hold | gripped the steel wire with the fixing tool. 定着具が、鋼線の把持を解除した状態の説明図。Explanatory drawing of the state which the fixing tool canceled the holding | grip of the steel wire. 支持部材とクサビ片の実施例の説明図。Explanatory drawing of the Example of a supporting member and a wedge piece. 定着具に鋼線を取り付けた状態の外観図。The external view of the state which attached the steel wire to the fixing tool.

Explanation of symbols

１：外筒
２Ａ：クサビ片
２Ｂ：クサビ台
３：支持部材
４：アンカー鋼線
５：介在部材 1: outer cylinder 2A: wedge piece 2B: wedge base 3: support member 4: anchor steel wire 5: interposition member

Claims

Anchor steel wire anchoring tool inserted into the drilled hole,
It has a fixing outer cylinder that houses the underground terminal of the steel wire,
On the inner surface of the outer cylinder, a pin engaging groove is formed on the bottom side of the hole ,
On the hole side, a wedge base with an increasing inner diameter is formed toward the hole bottom side of the hole,
Inside the outer cylinder,
The wedge pieces divided into a plurality of pieces and the wedge pieces are supported on the bottom side of the hole ,
And the support member which is a cylinder which can slide the inside along an inner wall is stored,
The support member is given a pushing force toward the hole by the pushing spring ,
And the support member houses a pin that can be pushed out toward the inner surface of the outer cylinder,
An interposition member is arranged between the wedge piece and the wedge stand,
By cutting the exposed part outside the hole of the steel wire, the tension of the steel wire that has been applied until then is released,
The force acts as a force to push the support member back from the hole mouth side to the hole bottom side through the end on the hole bottom side of the steel wire,
The elasticity of the push spring that pressurizes the support member is set to be smaller than this pushing back force, and the support member is slid to the hole bottom side,
The support member is moved by a certain distance and the pin falls into the engagement groove so that it can be engaged with the engagement groove on the inner surface of the outer cylinder and cannot be returned to the previous position again .
Removable anchor anchor.

The interposition member interposed between the steel wedge piece and the steel wedge stand is
The wedge piece and the wedge stand are members that do not directly contact and pressurize,
The removal anchor fixing tool according to claim 1.

The interposition member interposed between the steel wedge piece and the steel wedge stand is
It is a low friction member in which the wedge piece and the wedge stand are not directly contacted and pressurized.
The removal anchor fixing tool according to claim 1.