JP2021025276A - Post-construction anchor and post-construction anchor bushing - Google Patents

Post-construction anchor and post-construction anchor bushing Download PDF

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JP2021025276A
JP2021025276A JP2019143414A JP2019143414A JP2021025276A JP 2021025276 A JP2021025276 A JP 2021025276A JP 2019143414 A JP2019143414 A JP 2019143414A JP 2019143414 A JP2019143414 A JP 2019143414A JP 2021025276 A JP2021025276 A JP 2021025276A
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博司 谷口
Hiroshi Taniguchi
博司 谷口
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Abstract

To provide a post-construction anchor which is able to sufficiently retain anchor force without falling through, even when external load in a bending direction or a twisting direction is applied to a bolt attached to an anchor in a concrete casting state.SOLUTION: A post-construction anchor comprises: an anchor cylinder body 2 having an expansion part 21 on a tip part of a cylinder; an anchor cone 3 to be interpolated to the tip part of the cylinder in the anchor cylinder body; an anchor bolt 4 coupled with a base part of the anchor cone 3; and a post-construction anchor bushing 1 screwed by a prescribed torque, and disposed on the vicinity of a hole opening part within a pilot hole. Driving the anchor cylinder body 2 expands and deforms the expansion part 21 by being pressed with force from the inner side led by the anchor cone 3, and in an engaged state being anchored to the pilot hole, the post-construction anchor bushing causes at least either the anchor cylinder body or the anchor bolt to generate axis force.SELECTED DRAWING: Figure 3

Description

本発明は、コンクリートなどの躯体にアンカリングされる後施工アンカー、及び、後施工アンカーに取り付けて設置する後施工アンカー用ブッシュに関する。 The present invention relates to a post-construction anchor that is anchored to a skeleton such as concrete, and a bush for a post-construction anchor that is attached to and installed on the post-construction anchor.

従来、この種の後施工アンカー(以下、アンカーとする)として、コンクリートなどの躯体に穿孔された下穴に挿入されるアンカー本体部と、アンカー本体部に挿入される拡開ピンとで構成されたものが知られている(特許文献1参照)。 Conventionally, this type of post-construction anchor (hereinafter referred to as an anchor) is composed of an anchor main body inserted into a pilot hole drilled in a skeleton such as concrete, and an expansion pin inserted into the anchor main body. Is known (see Patent Document 1).

アンカー本体部は、円筒状に形成され、先端に小径の先端先細り部を構成する軸心孔を有している。また、アンカー本体部は、先端側の周壁にスリットが軸方向に形成された拡開部と、基部側に袋ナットのような締結ナットを螺合可能な雄ねじ部と、拡開部を含む先端側の外周面に形成された右ねじのねじ山とを備えている。一方、拡開ピンはアンカー本体部に形成された軸心孔に基部側から挿入可能な棒体からなり、アンカー本体部の拡開部を拡径するように先端側に形成された先細り部と、基端部に形成された打込み頭部とを備えている。 The anchor main body is formed in a cylindrical shape, and has an axial core hole at the tip, which constitutes a tapered tip having a small diameter. Further, the anchor main body includes an expansion portion in which a slit is formed in the peripheral wall on the tip side in the axial direction, a male screw portion in which a fastening nut such as a bag nut can be screwed on the base side, and a tip including the expansion portion. It is equipped with a right-hand thread formed on the outer peripheral surface on the side. On the other hand, the expansion pin consists of a rod body that can be inserted from the base side into the axial core hole formed in the anchor body portion, and has a tapered portion formed on the tip side so as to expand the diameter of the expansion portion of the anchor body portion. , With a driving head formed at the base end.

また従来、先端側に設けた拡開部により、下穴にアンカリングされる金属製のアンカー本体と、拡開部を内側から拡開させるコーン部と、拡開部の外周面に固着され、アンカー本体よりも高硬度の粒子状材を含む喰込み部と、を備えた後施工アンカーが開示される(特許文献2参照)。 Further, conventionally, a metal anchor body anchored in a pilot hole, a cone portion for expanding the expanded portion from the inside, and an outer peripheral surface of the expanded portion are fixed by an expansion portion provided on the tip side. A post-construction anchor provided with a biting portion containing a particulate material having a hardness higher than that of the anchor body is disclosed (see Patent Document 2).

特開2012−197840号公報Japanese Unexamined Patent Publication No. 2012-197840 特開2015−36571号公報JP-A-2015-365571

しかしながら、前記従来のアンカーでは、下穴の穴底付近のアンカリング部だけで圧接力を確保するため、打設後の状態でアンカーに取り付けたボルトに曲げ方向又はねじり方向の大きな外部負荷がかかった場合、躯体がアンカー力を保てずに破断したり、ボルトの螺子山が潰れて抜け落ちたりするおそれがある。特に、地震や振動等により、強い曲げ応力やねじり応力を繰り返し受けた場合には、このようなおそれが高くなる。 However, in the conventional anchor, in order to secure the pressure contact force only at the anchoring portion near the bottom of the prepared hole, a large external load in the bending direction or the twisting direction is applied to the bolt attached to the anchor in the state after casting. In that case, the skeleton may break without maintaining the anchor force, or the screw thread of the bolt may be crushed and fall off. In particular, when a strong bending stress or torsional stress is repeatedly applied due to an earthquake, vibration, or the like, such a possibility increases.

本発明は、上記の問題点に鑑み、打設後のアンカーに取り付けたボルトに曲げ方向又はねじり方向の大きな外部負荷がかかった場合、特に、地震や振動等により、強い曲げ応力やねじり応力を繰り返し受けた場合でも、アンカー力を十分に保ち続け、抜け落ちることのない後施工アンカー、又は後施工アンカー用ブッシュを提供することを課題とする。 In view of the above problems, the present invention applies strong bending stress and torsional stress to the bolt attached to the anchor after casting when a large external load is applied in the bending direction or the torsional direction, especially due to an earthquake or vibration. An object of the present invention is to provide a post-construction anchor or a post-installation anchor bush that does not come off while maintaining a sufficient anchor force even when repeatedly received.

上記課題を解決するため、本発明の後施工アンカーは下記の手段を講じている。
すなわち、本発明の後施工アンカーは、
下穴内に全体収容される筒体からなると共に、アンカーコーンによって拡開変形し得る拡開部を筒体の先部に有したアンカー筒体と、
先部側へ拡径した拡径体を有してなり、前記アンカー筒体の筒体の先部に内挿されて下穴内の穴底部に配置されるアンカーコーンと、
前記アンカーコーンの基部に同軸連結されたアンカーボルトと、
前記アンカーボルトの外周又はアンカー筒体の内周の少なくともいずれかに所定の螺子止めトルクで螺子止めされ、下穴内の穴口部付近に配置される後施工アンカー用ブッシュと、を備えてなる。
In order to solve the above problems, the post-construction anchor of the present invention takes the following measures.
That is, the post-construction anchor of the present invention
An anchor cylinder that consists of a cylinder that is entirely housed in a pilot hole and has an expansion portion at the tip of the cylinder that can be expanded and deformed by an anchor cone.
An anchor cone that has a diameter-expanded body that expands to the tip side, is inserted into the tip of the cylinder of the anchor cylinder, and is arranged at the bottom of the hole in the pilot hole.
Anchor bolts coaxially connected to the base of the anchor cone,
It is provided with a post-installed anchor bush that is screwed to at least one of the outer circumference of the anchor bolt or the inner circumference of the anchor cylinder with a predetermined screwing torque and is arranged near the hole opening in the prepared hole.

そして、前記アンカー筒体が下穴の穴底側へ打ち込まれることで、前記拡開部がアンカーコーンに内側から押圧されて拡開変形し、下穴にアンカリングした係止状態において、前記後施工アンカー用ブッシュによってアンカー筒体又はアンカーボルトの少なくともいずれかに軸力を継続的に発生させたアンカリング状態を維持することを特徴とする。 Then, when the anchor cylinder is driven into the hole bottom side of the prepared hole, the expanded portion is pressed from the inside by the anchor cone to expand and deform, and in a locked state anchored in the prepared hole, the rear It is characterized by maintaining an anchoring state in which an axial force is continuously generated in at least one of an anchor cylinder and an anchor bolt by a bush for a construction anchor.

上記構成によれば、穴口部に収容した後施工アンカー用ブッシュの螺子止めによって、下穴の穴軸方向に亘って配置されたアンカー筒体又はアンカーボルトの少なくともいずれかに軸力を発生させた状態を維持することで、拡開部の拡開による下穴の穴底部付近のアンカリングだけではない、アンカー全体のみかけの剛体による一体的なアンカリング効果と、穴口部の後施工アンカー用ブッシュの介在による変位抑制の効果が生じる。 According to the above configuration, an axial force is generated in at least one of the anchor cylinder or the anchor bolt arranged in the hole axial direction of the prepared hole by screwing the post-installed anchor bush housed in the hole opening. By maintaining the state, not only the anchoring near the bottom of the prepared hole due to the expansion of the expansion part, but also the integrated anchoring effect due to the apparent rigid body of the entire anchor and the bush for the post-installed anchor at the hole opening. The effect of suppressing displacement is produced by the intervention of.

前記本発明の後施工アンカーにおいて、前記後施工アンカー用ブッシュは、下穴の穴軸方向に沿って下穴内に全部収容される回転体からなると共に、回転体の基部から先端部にかけてアンカーボルトを内挿する中央孔が貫通形成されると共に、中央孔の内面にはアンカーボルトを螺入する内螺子が設けられる。また、前記アンカーコーンの基部中央にはアンカーボルトを螺入して連結する内螺子付きの連結穴が設けられ、前記アンカーボルトは、長さ方向全体に亘って外螺子が形成される。 In the post-installed anchor of the present invention, the post-installed anchor bush is composed of a rotating body that is completely accommodated in the prepared hole along the hole axis direction of the prepared hole, and an anchor bolt is attached from the base portion to the tip portion of the rotating body. The central hole to be inserted is formed through, and an inner screw for screwing an anchor bolt is provided on the inner surface of the central hole. Further, a connecting hole with an inner screw for screwing and connecting the anchor bolt is provided in the center of the base of the anchor cone, and the anchor bolt is formed with an outer screw over the entire length direction.

そして、前記アンカリング状態において、アンカーボルトの外螺子が、下穴内の穴底部付近の連結位置にて、所定の連結トルクで連結穴に螺入連結されると共に、下穴内の穴口部付近の螺子止め位置にて、前記連結トルクと同じかそれ以上の螺子止めトルクで中央孔の内螺子に螺子止めされ、
前記アンカリング状態において、アンカー筒体の拡開部がアンカーコーンに押圧されると共に、アンカー筒体の基端部が後施工アンカー用ブッシュの先端部と圧接することで、アンカー筒体の軸方向の所定区間に亘って、軸方向の圧縮軸力が内部応力として継続的に発生し、また、
アンカーボルトの前記連結部と螺子止め部との間の第一区間に亘って、所定以上の引っ張り軸力がアンカーボルトの内部応力として継続的に発生することを特徴とする。
Then, in the anchoring state, the outer screw of the anchor bolt is screwed into the connecting hole with a predetermined connecting torque at the connecting position near the bottom of the hole in the prepared hole, and the screw near the hole opening in the prepared hole. At the stop position, the screw is screwed to the inner screw of the central hole with a screw stop torque equal to or greater than the connection torque.
In the anchoring state, the expanded portion of the anchor cylinder is pressed against the anchor cone, and the base end portion of the anchor cylinder is in pressure contact with the tip end portion of the post-installed anchor bush, so that the anchor cylinder is axially oriented. Axial compression axial force is continuously generated as internal stress over a predetermined section of.
It is characterized in that a predetermined or more tensile axial force is continuously generated as an internal stress of the anchor bolt over the first section between the connecting portion and the screw fixing portion of the anchor bolt.

前記本発明の後施工アンカーにおいて、前記アンカーコーンは、アンカーボルトとの連結穴を基端面に有した柱形状の連結基部と、連結基部から軸方向先端へ連なって先側へ拡径した拡径部とからなる一体製材で構成され、
前記アンカリング状態において、
アンカーボルトには、アンカーボルトの前記連結部と螺子止め部との間の軸方向の第一区間に亘って、所定以上の引っ張り軸力が継続的に発生すると共に、
アンカー筒体には、前記第一区間よりも長い軸方向の第二区間に亘って、所定以上の圧縮軸力が継続的に発生することを特徴とする。
In the post-installed anchor of the present invention, the anchor cone has a pillar-shaped connecting base having a connecting hole with an anchor bolt on the base end surface, and a diameter-expanded portion connected from the connecting base to the axial tip and expanded to the front side. It is composed of an integral lumber consisting of parts,
In the anchoring state,
Anchor bolts are continuously subjected to a predetermined or greater tensile axial force over the first section in the axial direction between the connecting portion of the anchor bolt and the screw stopper portion, and at the same time.
The anchor cylinder is characterized in that a predetermined or more compression axial force is continuously generated over a second section in the axial direction longer than the first section.

前記後施工アンカー用ブッシュは、基部回転体と、基部回転体から軸方向先端へ連なる先部回転体とからなる一体製材で構成され、このうち先部回転体には、先端周囲に亘って、先尖り形状となるように傾斜した傾斜面が形成され、
前記アンカーコーンには、先端側部周囲に亘って、先側へ拡径形状となるように傾斜した傾斜面が形成され、
前記アンカリング状態において、
アンカー筒体の基端部と後施工アンカー用ブッシュの傾斜面とが圧接すると共に、アンカー筒体の拡開部の内面とアンカーコーンの傾斜面とが圧接することで、
アンカー筒体には所定以上の内部応力が継続的に発生することを特徴とする。
The post-construction anchor bush is composed of an integral sawn body composed of a base rotating body and a tip rotating body extending from the base rotating body to the tip in the axial direction. Among them, the tip rotating body extends around the tip. An inclined surface is formed so as to have a pointed shape,
The anchor cone is formed with an inclined surface that is inclined so as to have an enlarged diameter toward the tip side over the periphery of the tip side portion.
In the anchoring state,
The base end of the anchor cylinder and the inclined surface of the post-construction anchor bush are in pressure contact with each other, and the inner surface of the expanded portion of the anchor cylinder and the inclined surface of the anchor cone are in pressure contact with each other.
The anchor cylinder is characterized in that an internal stress of a predetermined value or more is continuously generated.

前記アンカー筒体は、筒端形状の基端部のうち内周寄りの一部周方向または全周方向に亘って、内傾斜加工又は断面視L字状にザグリ加工された内周加工部を有し、
前記アンカリング状態において、
アンカー筒体の基端面の内周加工部が傾斜面と圧接することで、軸方向と平行でない傾斜方向の圧接反力が継続的に発生することを特徴とする。
The anchor cylinder is formed by inwardly tilting or counterboring an L-shaped cross section over a part of the inner circumference of the base end of the cylinder end shape toward the inner circumference or the entire circumference. Have and
In the anchoring state,
The inner peripheral processed portion of the base end surface of the anchor cylinder is in pressure contact with the inclined surface, so that a pressure contact reaction force in the inclined direction that is not parallel to the axial direction is continuously generated.

前記後施工アンカー用ブッシュは、下穴の穴口部内に収容可能な軸交断面(回転軸に直交する回転体断面)の基部回転体と、基部回転体から軸方向先端へ連なる先部回転体とからなる一体製材で構成され、このうち基部回転体の基端面又は側面には、複数の切欠き部が、周方向へ等間隔に設けられ、
前記複数の切欠き部に対応する嵌合部を有した螺子止め冶具によって、所定の螺子止めトルクを付与されることで、前記アンカリング状態となることを特徴とする。
The post-construction anchor bush includes a base rotating body having an axial crossing cross section (a rotating body cross section orthogonal to the rotation axis) that can be accommodated in the hole opening of the pilot hole, and a tip rotating body that is continuous from the base rotating body to the tip in the axial direction. It is made of an integral lumber, of which a plurality of notches are provided at equal intervals in the circumferential direction on the base end surface or side surface of the base rotating body.
It is characterized in that the anchoring state is obtained by applying a predetermined screw fixing torque by a screw fixing jig having a fitting portion corresponding to the plurality of notch portions.

また、本発明の後施工アンカー用ブッシュは、
アンカー打設の対象躯体に予め設けた下穴内に設置される後施工アンカー部品セットにおいて、
下穴の穴口部内に収容された状態で、前記後施工アンカーセットの一部に取り付け可能な、後施工アンカー用ブッシュであって、以下の手段を講じている。
Further, the bush for the post-construction anchor of the present invention is
In the post-construction anchor parts set installed in the pilot hole provided in advance in the target frame for anchor placement,
A bush for a post-construction anchor that can be attached to a part of the post-construction anchor set while being housed in the hole opening of the pilot hole, and the following means are taken.

本発明の後施工アンカー用ブッシュは、
アンカーボルトを内挿して螺子固定する中央孔を有した基部回転体と、基部回転体から軸方向先端へ連なる先部回転体とからなる一体製材で構成され、
前記後施工アンカー用ブッシュは、以下の後施工アンカー部品セットに取り付けて設置する。
後施工アンカー部品セットは、下穴内に全体収容される筒体からなると共に、アンカーコーンによって拡開変形し得る拡開部を筒体の先部に有したアンカー筒体と、
先部側へ拡径した拡径体からなり、前記アンカー筒体の筒体の先部に内挿されて下穴内の穴底部に配置されるアンカーコーンと、
前記アンカーコーンの基部に同軸連結されたアンカーボルトと、を具備し、アンカー筒体が下穴の穴底側へ打ち込まれることで、前記拡開部がアンカーコーンに内側から押圧されて拡開変形し、下穴にアンカリングした係止状態となる。
The bush for post-construction anchor of the present invention
It is composed of an integral lumber consisting of a base rotating body having a central hole for inserting an anchor bolt and fixing it with a screw, and a tip rotating body extending from the base rotating body to the tip in the axial direction.
The post-construction anchor bushing is attached to and installed on the following post-construction anchor parts set.
The post-construction anchor parts set consists of a cylinder that is entirely housed in the pilot hole, and also has an anchor cylinder at the tip of the cylinder that can be expanded and deformed by the anchor cone.
An anchor cone composed of a diameter-expanded body whose diameter is expanded toward the tip side, which is inserted into the tip of the cylinder of the anchor cylinder and is arranged at the bottom of the hole in the prepared hole.
Anchor bolts coaxially connected to the base of the anchor cone are provided, and when the anchor cylinder is driven into the hole bottom side of the pilot hole, the expansion portion is pressed against the anchor cone from the inside to expand and deform. Then, it becomes a locked state anchored in the prepared hole.

そして、本発明の後施工アンカー用ブッシュは、係止状態において中央孔がアンカーボルトの外周に所定の螺子止めトルクで螺子止めされることで、アンカーボルトのうち穴口部近傍の部分をアンカー打設面外方へ軸方向に引っ張る引っ張り軸力を、アンカーボルト内部に継続的に発生させると共に、
アンカー筒体の基端面を先部回転体で圧接して、アンカー筒体を軸方向へ圧縮する圧縮軸力を、アンカー筒体内部に継続的に発生させるアンカリング状態となることを特徴とする。
Then, in the post-installed anchor bush of the present invention, the central hole is screwed to the outer periphery of the anchor bolt with a predetermined screwing torque in the locked state, so that the portion of the anchor bolt near the hole opening is anchored. Along with continuously generating a tensile axial force that pulls outward in the axial direction inside the anchor bolt,
The anchoring state is characterized in that the base end surface of the anchor cylinder is pressed against the tip rotating body to continuously generate a compression axial force that compresses the anchor cylinder in the axial direction inside the anchor cylinder. ..

この構成によれば、下穴の穴口部で後施工アンカー用ブッシュを配置して軸力を付加することで、下穴の穴底部まで挿入したアンカー筒体の拡開部によるアンカリングだけでなく、穴底部から穴口部までに亘って一体的な後施工アンカーの剛体効果によるアンカリングを行うことが可能となる。 According to this configuration, by arranging a bush for a post-construction anchor at the hole opening of the pilot hole and applying an axial force, not only anchoring by the expanded part of the anchor cylinder inserted to the bottom of the pilot hole is also performed. , It is possible to perform anchoring by the rigid body effect of the integrated post-construction anchor from the bottom of the hole to the mouth of the hole.

また、アンカー筒体の弾性変形に基づく圧縮内部応力によって、アンカーボルトの軸力と釣り合いをとることで、アンカー筒体の圧縮内部応力の反力として生じる拡開部のアンカー力を高めることとなる。 In addition, the compression internal stress based on the elastic deformation of the anchor cylinder balances with the axial force of the anchor bolt, thereby increasing the anchor force of the expanded portion generated as a reaction force of the compression internal stress of the anchor cylinder. ..

さらに、アンカー設置面近傍の穴口部で後施工アンカー用ブッシュによる充填効果が生じるため、中央孔によって支持されたアンカーボルトが穴口部で変位する量を抑制することができ、軸方向に亘る複数の点でアンカリング効果を生じさせることができる。 Furthermore, since the filling effect of the post-installed anchor bushing occurs at the hole opening near the anchor installation surface, it is possible to suppress the amount of displacement of the anchor bolt supported by the central hole at the hole opening, and a plurality of axially oriented anchor bolts can be suppressed. An anchoring effect can be produced at points.

また後施工アンカー用ブッシュを有さない後施工アンカー部品セットの設置後に、本願の後施工アンカー用ブッシュを取付け、特定の螺子止めトルクで螺子止め設置することで、後施工アンカーを当初から取り付けていたのと同様のアンカー効果を確保することができる。 In addition, after installing the post-construction anchor parts set that does not have the post-construction anchor bushing, the post-construction anchor bushing of the present application is installed, and the post-construction anchor is installed from the beginning by screwing and installing with a specific screwing torque. It is possible to secure the same anchor effect as the one.

上記手段を講じることで、打設後の状態でアンカーに取り付けたボルトに曲げ方向又はねじり方向の大きな外部負荷がかかった場合、特に、地震や振動等により、強い曲げ応力やねじり応力を繰り返し受けた場合でも、アンカー力を十分に保ち続け、抜け落ちることのない後施工アンカー、又は後施工アンカー用ブッシュを提供することが可能となった。 By taking the above measures, when a large external load in the bending or twisting direction is applied to the bolt attached to the anchor in the state after casting, strong bending stress or torsional stress is repeatedly received, especially due to an earthquake or vibration. Even in such a case, it has become possible to provide a post-installed anchor or a bush for a post-installed anchor that keeps the anchor force sufficiently and does not come off.

実施例1の後施工アンカー用ブッシュの三面図及び中央断面図Three-view and central sectional view of bush for post-construction anchor of Example 1. 実施例1の後施工アンカーの設置過程の説明図Explanatory drawing of installation process of post-construction anchor of Example 1 図2に示す実施例1の後施工アンカーの設置後の状態説明図FIG. 2 is an explanatory view of a state after installation of the post-construction anchor of the first embodiment shown in FIG. 図3のBB部分の拡大図Enlarged view of the BB part of FIG. 実施例1の後施工アンカー用の下方斜視図Downward perspective view for post-construction anchor of Example 1 実施例2の後施工アンカー用ブッシュの二面図及び中央断面図Two-view and central sectional view of the bush for post-construction anchor of Example 2. 実施例2の後施工アンカーの設置後の状態説明図Illustration of the state after installation of the post-construction anchor of Example 2 実施例3の後施工アンカー用ブッシュの二面図及び中央断面図Two-sided view and central sectional view of bush for post-construction anchor of Example 3. 実施例3の後施工アンカーの設置後の状態説明図Illustration of the state after installation of the post-construction anchor of Example 3 実施例1の後施工アンカーの設置に使用する螺子止め治具の斜視図Perspective view of a screw fixing jig used for installing a post-construction anchor of the first embodiment.

以下、本発明を実施するための形態として、実施例1〜3として示す各図とともに説明する。なお、以下の各構成名称に続いて記載する数字列または数字とアルファベットの組み合わせ列は、実施例として示す図面を参照して理解するための参照用符号であり、これによって用語や構成を限定したり意義を限定したりするものではない。 Hereinafter, modes for carrying out the present invention will be described together with the drawings shown as Examples 1 to 3. In addition, the number string or the combination string of the number and the alphabet described after each configuration name below is a reference code for understanding with reference to the drawings shown as examples, thereby limiting the terms and configurations. It does not limit its significance.

いずれの実施例においても、本発明に係る後施工アンカーは、
下穴(PH)内に全体収容される筒体からなると共に、アンカーコーンによって拡開変形し得る拡開部(21)を筒体の先部に有したアンカー筒体(2)と、
先部側へ拡径した拡径体からなり、前記アンカー筒体の筒体の先部に内挿されて下穴(PH)内の穴底部(PH1)に配置されるアンカーコーン(3)と、
前記アンカーコーン(3)の基部に同軸連結されたアンカーボルト(4)と、
前記アンカーボルトの外周又はアンカー筒体の内周の少なくともいずれかに所定の螺子止めトルクで螺子止めされ、下穴内の穴口部付近に配置される後施工アンカー用ブッシュ(1)と、を備えてなる(図5、図7、図9)。
In any of the examples, the post-construction anchor according to the present invention is
Anchor cylinder (2), which is composed of a cylinder that is entirely housed in a pilot hole (PH) and has an expansion portion (21) that can be expanded and deformed by an anchor cone at the tip of the cylinder.
Anchor cone (3) composed of a diameter-expanded body whose diameter is expanded toward the tip side, which is inserted into the tip portion of the cylinder body of the anchor cylinder and is arranged at the hole bottom portion (PH1) in the prepared hole (PH). ,
Anchor bolts (4) coaxially connected to the base of the anchor cone (3),
A post-installed anchor bush (1) that is screwed to at least one of the outer circumference of the anchor bolt or the inner circumference of the anchor cylinder with a predetermined screwing torque and is arranged near the hole opening in the prepared hole is provided. (Fig. 5, Fig. 7, Fig. 9).

そして、アンカー筒体(2)が下穴の穴底側へ打ち込まれることで、前記拡開部がアンカーコーンに内側から押圧されて拡開変形し、下穴の穴底部(PH1)に係止した状態において、前記後施工アンカー用ブッシュ(1)を穴口部内にて所定トルクで螺子止めした本発明特有のアンカリング状態とすることによって、少なくともアンカー筒体(2)に軸力を継続的に発生させてなる(後述の実施例1〜3)。 Then, when the anchor cylinder (2) is driven into the hole bottom side of the prepared hole, the expanded portion is pressed by the anchor cone from the inside to expand and deform, and is locked to the hole bottom portion (PH1) of the prepared hole. In this state, the post-construction anchor bush (1) is screwed into the hole opening with a predetermined torque to bring the anchoring state peculiar to the present invention into an anchoring state, so that at least the axial force is continuously applied to the anchor cylinder (2). It is generated (Examples 1 to 3 described later).

或いは、前記後施工アンカー用ブッシュ(1)を穴口部内にて所定トルクで螺子止めした、本発明特有のアンカリング状態とすることによって、少なくともアンカー筒体(2)及びアンカーボルト(4)の両方に、互いに釣り合った圧縮軸力及び引っ張り軸力を継続的に発生させてなることを特徴とする(後述の実施例1,2)。
なお、後述の実施例1は、後施工アンカー用ブッシュ1をアンカーボルト4にのみ螺子止めしてアンカー筒体とは遊挿させており(図3)、後述の実施例2は、後施工アンカー用ブッシュ1をアンカーボルト及びアンカー筒体の双方に螺子止めしており(図7)、そして後述の実施例3は、後施工アンカー用ブッシュ1をアンカー筒体にのみ螺子止めしてアンカーボルトとは遊挿させている(図9)。これらのいずれも、アンカリング状態において、後施工アンカーの構成材に、下穴方向に亘って、拡開変形による係止反力以外の軸力を継続的に発生させることを特徴とする。
Alternatively, at least both the anchor cylinder (2) and the anchor bolt (4) are placed in an anchoring state peculiar to the present invention in which the post-installed anchor bush (1) is screwed into the hole opening with a predetermined torque. In addition, it is characterized in that a compression axial force and a tensile axial force that are in balance with each other are continuously generated (Examples 1 and 2 described later).
In the first embodiment described later, the bush 1 for the post-installed anchor is screwed only to the anchor bolt 4 so as to be loosely inserted into the anchor cylinder (FIG. 3), and the second embodiment described later is the post-installed anchor. The bush 1 for post-installation is screwed to both the anchor bolt and the anchor cylinder (FIG. 7), and in the third embodiment described later, the bush 1 for post-installed anchor is screwed only to the anchor cylinder to form an anchor bolt. Is idle (Fig. 9). All of these are characterized in that, in the anchoring state, an axial force other than the locking reaction force due to the expansion deformation is continuously generated in the constituent material of the post-construction anchor in the pilot hole direction.

以下、本発明の基本的な構成と使用方法について詳述する。 Hereinafter, the basic configuration and usage of the present invention will be described in detail.

(後施工アンカー用ブッシュ(1))
後施工アンカー用ブッシュ(1)は、下穴の穴軸方向に沿って下穴内に全部収容される回転体からなると共に、回転体の基部から先端部にかけてアンカーボルトを内挿する中央孔(100)が貫通形成されると共に、中央孔(100)の内面にはアンカーボルトを螺入する内螺子(100S)が設けられる。
後施工アンカー用ブッシュ(1)の回転体は具体的には、下穴の穴口部内に収容可能な軸交断面(回転軸に直交する回転体断面)の基部回転体(10)と、基部回転体から軸方向先端へ連なる先部回転体(11/12)とからなる一体製材で構成される。
(Bush for post-construction anchor (1))
The post-installed anchor bush (1) is composed of a rotating body that is entirely accommodated in the prepared hole along the hole axial direction of the prepared hole, and a central hole (100) into which an anchor bolt is inserted from the base to the tip of the rotating body. ) Is formed through, and an inner screw (100S) for screwing an anchor bolt is provided on the inner surface of the central hole (100).
Specifically, the rotating body of the post-construction anchor bush (1) is a base rotating body (10) having an axial crossing cross section (a rotating body cross section orthogonal to the rotating axis) that can be accommodated in the hole opening of the pilot hole, and a base rotating body. It is composed of an integral lumber composed of a tip rotating body (11/12) extending from the body to the tip in the axial direction.

後施工アンカー用ブッシュ(1)は、基部の複数の切欠き部(1D/10C)に、トルクレンチに取り付けた螺子止め冶具(5)の嵌合部(51E)を嵌合させ、螺子止め冶具(5)によって所定の螺子止めトルクを付与することでアンカリング状態となる(図2(c)’)。ここで、後施工アンカー用ブッシュ(1)に付与する所定の螺子止めトルクとは、螺子止めトルクを付与した状態でアンカーボルトに引っ張り軸力を発生させ、かつアンカー筒体に圧縮軸力を発生させた内部応力発生中の常態を維持することのできるトルクであり、アンカーボルト、アンカー筒体それぞれのどちらの破断点よりも小さい応力を与えるトルクである。 In the post-installed anchor bush (1), the fitting portion (51E) of the screw fixing jig (5) attached to the torque wrench is fitted to the plurality of notches (1D / 10C) at the base, and the screw fixing jig (1) is used. By applying a predetermined screw stop torque according to (5), an anchoring state is established (FIG. 2 (c)'). Here, the predetermined screw fixing torque applied to the post-installed anchor bush (1) is to generate a tensile axial force on the anchor bolt and a compression axial force on the anchor cylinder while the screw fixing torque is applied. It is a torque that can maintain the normal state during the generation of the internal stress, and is a torque that gives a stress smaller than the breaking point of each of the anchor bolt and the anchor cylinder.

基部回転体の基端面又は側面には、複数の切欠き部(1D/10C)が、周方向へ等間隔に設けられ、前記複数の切欠き部に対応する嵌合部(51E)を有した螺子止め冶具(5)によって、所定の螺子止めトルクを付与されることで、前記アンカリング状態となる。 A plurality of notches (1D / 10C) are provided at equal intervals in the circumferential direction on the base end surface or side surface of the base rotating body, and have fitting portions (51E) corresponding to the plurality of notches. When a predetermined screw fixing torque is applied by the screw fixing jig (5), the anchoring state is obtained.

先部回転体(11/12)の先端側には、先端周囲に亘って、先尖り形状となるように傾斜した傾斜面(11T)が形成され、さらに傾斜面(11T)の内周縁に連なって、軸に垂直な先端面11Fとが形成される。傾斜面によってアンカー筒体内の軸方向位置まで螺着区間(内螺子100Sの軸方向長さ100L又は外螺子12Sの軸方向長さ12L)を確保することで、螺子止めトルクによる螺子止め力を維持するものとなっている。 On the tip side of the tip rotating body (11/12), an inclined surface (11T) inclined so as to have a pointed shape is formed around the tip, and is further connected to the inner peripheral edge of the inclined surface (11T). Therefore, the tip surface 11F perpendicular to the axis is formed. By securing a screwing section (axial length 100L of the inner screw 100S or axial length 12L of the outer screw 12S) to the axial position in the anchor cylinder by the inclined surface, the screw fixing force by the screw stopping torque is maintained. It is supposed to be done.

(アンカー筒体(2))
アンカー筒体(2)は、下穴の穴軸方向に沿って全体収容される筒体からなると共に、アンカーコーン(3)によって拡開変形し得る拡開部(21)を筒体の先部に有する。アンカー筒体(2)は金属によって一体的に構成されることが好ましく、例えば鋼材からなる。
(Anchor cylinder (2))
The anchor cylinder (2) is composed of a cylinder that is entirely accommodated along the hole axis direction of the pilot hole, and has an expansion portion (21) that can be expanded and deformed by the anchor cone (3) at the tip of the cylinder. Have in. The anchor cylinder (2) is preferably integrally formed of metal, for example, made of steel.

拡開部(21)は筒体の先部側の軸方向一定区間において、アンカーコーン(3)の拡径部が内部から押圧することで拡開状に弾性変形又は塑性変形する部分である。実施例では、筒体の先端において周方向等間隔に形成された複数本の細幅のスリット21Sを有し、また、周面には軸方向の複数位置に亘って円周方向の周溝21Dが形成される(図2、図3、図7、図9)。 The expansion portion (21) is a portion that is elastically deformed or plastically deformed in an expansion shape when the diameter expansion portion of the anchor cone (3) is pressed from the inside in a fixed axial section on the tip side of the cylinder. In the embodiment, the tip of the cylinder has a plurality of narrow slits 21S formed at equal intervals in the circumferential direction, and the peripheral surface has a circumferential groove 21D over a plurality of positions in the axial direction. Is formed (FIGS. 2, FIG. 3, FIG. 7, FIG. 9).

(内周加工部(20E))
前記アンカー筒体(2)は、筒端形状の基端部(2E)のうち内周寄りの一部周方向または全周方向に亘って、内傾斜加工又は断面視L字状にザグリ加工された内周加工部(20E)を有する。アンカリング状態において、アンカー筒体の基端面の内周加工部(20E)が傾斜面(1T)と圧接することで、軸方向と平行でない傾斜方向の圧接反力が継続的に発生する。また、アンカー筒体の拡開部の内面(210S)とアンカーコーンの傾斜面(3T)とが圧接することで、アンカー筒体には所定以上の内部応力(2IF)が継続的に発生する。
(Inner circumference processing part (20E))
The anchor cylinder (2) is internally inclined or counterbored in an L-shape in a cross-sectional view over a part or all of the inner circumference of the base end (2E) having a cylinder end shape. It has an inner peripheral processing portion (20E). In the anchoring state, the inner peripheral processed portion (20E) of the base end surface of the anchor cylinder is in pressure contact with the inclined surface (1T), so that a pressure contact reaction force in the inclined direction that is not parallel to the axial direction is continuously generated. Further, when the inner surface (210S) of the expanded portion of the anchor cylinder and the inclined surface (3T) of the anchor cone are in pressure contact with each other, an internal stress (2IF) equal to or higher than a predetermined value is continuously generated in the anchor cylinder.

(アンカーコーン(3))
アンカーコーン(3)は、アンカーボルトとの連結穴を基端面に有した柱形状の連結基部(32)と、連結基部から軸方向先端へ連なって先側へ拡径した拡径部(31)とからなる一体製材で構成される。アンカーコーン(3)の基部中央にはアンカーボルトを螺入して連結する連結穴(3H)が設けられる。
この連結穴(3H)は、アンカーボルト(4)の長さ方向全体に亘る外螺子に対応している。前記拡径部(31)には、先端側部周囲に亘って、先側へ拡径形状となるように傾斜した傾斜面(3T)が形成され、この傾斜面(3T)が拡開部の内面に押圧接触する。
また、アンカー筒体が打設されることで、アンカー筒体の拡開部(21)がアンカーコーン(3)に押圧され、拡開部が拡開変形する。
アンカリング状態において、
アンカーボルトの前記連結部と螺子止め部との間の第一区間(4IL)に亘って、所定以上の引っ張り軸力(4IF)がアンカーボルトの内部応力として継続的に発生する。
(Anchor cone (3))
The anchor cone (3) has a pillar-shaped connecting base portion (32) having a connecting hole with an anchor bolt on the base end surface, and a diameter-expanded portion (31) extending from the connecting base portion to the tip in the axial direction and expanding to the front side. It is composed of one-piece lumber consisting of. A connecting hole (3H) for screwing and connecting anchor bolts is provided in the center of the base of the anchor cone (3).
This connecting hole (3H) corresponds to an outer screw extending over the entire length direction of the anchor bolt (4). The diameter-expanded portion (31) is formed with an inclined surface (3T) that is inclined so as to have a diameter-expanded shape toward the tip side over the periphery of the tip side portion, and this inclined surface (3T) is the expanded portion. Pressing contact with the inner surface.
Further, when the anchor cylinder is driven, the expanded portion (21) of the anchor cylinder is pressed against the anchor cone (3), and the expanded portion is expanded and deformed.
In the anchoring state
A predetermined or greater tensile axial force (4IF) is continuously generated as an internal stress of the anchor bolt over the first section (4IL) between the connecting portion and the screwing portion of the anchor bolt.

(アンカーボルト(4))
アンカーボルト(4)は、長さ方向全体に亘って外螺子が形成されている。このアンカーボルト(4)の外螺子が、下穴(PH)内の穴底部(PH1)付近の連結部にて、所定の連結トルクで連結穴に螺入連結されると共に、下穴(PH)内の穴口部(PH2)付近の螺子止め部にて、前記連結トルクと同じかそれ以上の螺子止めトルクで中央孔の内螺子に螺子止めされる。
(Anchor bolt (4))
Anchor bolt (4) has an outer screw formed over the entire length direction. The outer screw of the anchor bolt (4) is screwed into and connected to the connecting hole with a predetermined connecting torque at the connecting portion near the hole bottom (PH1) in the prepared hole (PH), and the prepared hole (PH). At the screw stop portion near the inner hole opening (PH2), the screw is screwed to the inner screw of the central hole with a screw stop torque equal to or greater than the connection torque.

(アンカリング状態)
実施例1及び2では、アンカリング状態において、アンカー筒体の拡開部(21)がアンカーコーン(3)に押圧されると共に、アンカー筒体の基端部(2E)が後施工アンカー用ブッシュの先端部と圧接することで、アンカーボルトの前記連結部と螺子止め部との間の第一区間(4IL)に亘って、所定以上の引っ張り軸力(4IF)がアンカーボルトの内部応力として継続的に発生する。またアンカリング状態において、アンカーボルト(4)には、アンカーボルトの前記連結部と螺子止め部との間の第一区間(4IL)に亘って、所定以上の引っ張り軸力(4IF)が継続的に発生すると共に、アンカー筒体(2)には、前記第一区間(4IL)よりも長い第二区間(2IL)に亘って、所定以上の圧縮軸力(2IF)が継続的に発生する。
(Anchoring state)
In Examples 1 and 2, in the anchoring state, the expanded portion (21) of the anchor cylinder is pressed against the anchor cone (3), and the base end portion (2E) of the anchor cylinder is a bush for post-installed anchor. By pressure contacting the tip of the anchor bolt, a predetermined or higher tensile axial force (4IF) continues as an internal stress of the anchor bolt over the first section (4IL) between the connecting portion of the anchor bolt and the screw stop portion. Occurs. Further, in the anchoring state, the anchor bolt (4) is continuously subjected to a tensile axial force (4IF) equal to or higher than a predetermined value over the first section (4IL) between the connecting portion and the screw fixing portion of the anchor bolt. In addition, a predetermined or greater compression axial force (2IF) is continuously generated in the anchor cylinder (2) over a second section (2IL) longer than the first section (4IL).

(後施工アンカー用ブッシュ)
また、本発明の後施工アンカー用ブッシュは、
アンカー打設の対象躯体(C)に予め設けた下穴(PH)内に設置される後施工アンカー部品セットにおいて、
設置された既存の後施工アンカーに後付で取り付けるか、或いは交換して取り付け可能なブッシュ体からなる。取り付けたブッシュ体は、下穴の穴口部(PH2)内に収容された状態となる。
後施工アンカー用ブッシュは、所定の後施工アンカー部品セットに取り付けて設置する。前記所定の後施工アンカー部品セットは、
下穴(PH)内に全体収容される筒体からなると共に、アンカーコーンによって拡開変形し得る拡開部(21)を筒体の先部に有したアンカー筒体(2)と、
先部側へ拡径した拡径体からなり、前記アンカー筒体の筒体の先部に内挿されて下穴(PH)内の穴底部(PH1)に配置されるアンカーコーン(3)と、
前記アンカーコーン(3)の基部に同軸連結されたアンカーボルト(4)と、を具備する。
アンカー筒体(2)が下穴の穴底側へ打ち込まれることで、前記拡開部がアンカーコーンに内側から押圧されて拡開変形し、下穴にアンカリングした係止状態となる。この係止状態において、前記中央孔がアンカーボルトの外周又はアンカー筒体の内周の少なくともいずれかに所定の螺子止めトルクで螺子止めされ、下穴内の穴口部付近に収容配置されることで、アンカリング状態となる。
アンカリング状態においては、後施工アンカー用ブッシュを少なくともアンカー筒体の基端部2Eに圧接するように螺子止されているため、少なくともアンカー筒体に、係止反力以外の軸力を継続的に発生させてなる。
実施例1では、後施工アンカー用ブッシュ(1)の先部回転体(11/12)でアンカー筒体の基端部(2E)を圧接して、アンカー筒体を軸方向へ圧縮する圧縮軸力を、アンカー筒体内部に継続的に発生させると共に、後施工アンカー用ブッシュ(1)の中央孔の内螺子(100S)をアンカーボルトの外螺子に螺合させて、アンカーボルトを軸方向へ引っ張る引っ張り軸力を、アンカーボルト内部に継続的に発生させる。
(Bush for post-construction anchor)
Further, the bush for the post-construction anchor of the present invention is
In the post-construction anchor parts set installed in the pilot hole (PH) provided in advance in the target skeleton (C) for anchor placement,
It consists of a bush body that can be retrofitted to or replaced with an existing post-construction anchor that has been installed. The attached bush body is in a state of being housed in the hole opening portion (PH2) of the prepared hole.
The post-construction anchor bush is attached to a predetermined post-construction anchor parts set and installed. The predetermined post-construction anchor parts set
Anchor cylinder (2), which is composed of a cylinder that is entirely housed in a pilot hole (PH) and has an expansion portion (21) that can be expanded and deformed by an anchor cone at the tip of the cylinder.
Anchor cone (3) composed of a diameter-expanded body whose diameter is expanded toward the tip side, which is inserted into the tip portion of the cylinder body of the anchor cylinder and is arranged at the hole bottom portion (PH1) in the prepared hole (PH). ,
An anchor bolt (4) coaxially connected to the base of the anchor cone (3) is provided.
When the anchor cylinder (2) is driven into the hole bottom side of the prepared hole, the expanded portion is pressed from the inside by the anchor cone to expand and deform, and the anchored state is anchored in the prepared hole. In this locked state, the central hole is screwed to at least one of the outer circumference of the anchor bolt or the inner circumference of the anchor cylinder with a predetermined screwing torque, and is accommodated and arranged in the vicinity of the hole opening in the prepared hole. It becomes an anchoring state.
In the anchoring state, since the post-construction anchor bush is screwed so as to press-contact at least the base end portion 2E of the anchor cylinder, at least the anchor cylinder is continuously subjected to an axial force other than the locking reaction force. It is generated in.
In the first embodiment, a compression shaft that compresses the anchor cylinder in the axial direction by pressing the base end portion (2E) of the anchor cylinder with the tip rotating body (11/12) of the post-installed anchor bush (1). A force is continuously generated inside the anchor cylinder, and the inner screw (100S) of the central hole of the post-installed anchor bush (1) is screwed into the outer screw of the anchor bolt to move the anchor bolt in the axial direction. A tensile axial force that pulls is continuously generated inside the anchor bolt.

アンカーボルトの外螺子は、下穴(PH)内の穴底部(PH1)付近の連結部にて、所定の連結トルクでコーン3の連結穴に螺入連結される。これと共に、下穴(PH)内の穴口部(PH2)付近の螺子止め部にて、前記連結トルクと同じかそれ以上の螺子止めトルクで中央孔の内螺子に螺子止めされる。 The outer screw of the anchor bolt is screwed and connected to the connecting hole of the cone 3 with a predetermined connecting torque at the connecting portion near the hole bottom (PH1) in the prepared hole (PH). At the same time, at the screw stop portion near the hole opening portion (PH2) in the prepared hole (PH), the screw is screwed to the inner screw of the central hole with a screw stop torque equal to or greater than the connection torque.

(内部応力の発生)
アンカリング状態において、
アンカー筒体の基端部(2E)と後施工アンカー用ブッシュの傾斜面(1T)とが圧接すると共に、アンカー筒体の拡開部の内面(210S)とアンカーコーンの傾斜面(3T)とが圧接することで、アンカー筒体には所定以上の内部応力(2IF)が継続的に発生する。
(Generation of internal stress)
In the anchoring state
The base end portion (2E) of the anchor cylinder and the inclined surface (1T) of the post-construction anchor bush are in pressure contact with each other, and the inner surface (210S) of the expanded portion of the anchor cylinder and the inclined surface (3T) of the anchor cone. Is pressure-welded, and an internal stress (2IF) equal to or higher than a predetermined value is continuously generated in the anchor cylinder.

(螺子止め冶具5)
なお、螺子止め冶具5はトルクレンチのレンチ体に基部側を取り付けて、先端側の嵌合部を下穴(H)内の後施工アンカー用ブッシュに嵌合させて使用する。嵌合部51は、下穴(PH)よりも小さな径の円柱部又は多角形柱部とその先側に形成された突出部又は溝部とから構成される。突出部又は溝部は、後施工アンカー用ブッシュの基部に形成された複数の切欠き部に対応した形状、個数及び配置からなる。例えば図10に示す螺子止め冶具は、実施例1(図1)の後施工アンカー用ブッシュ(後施工アンカー用ブッシュ)の三方溝からなる切欠き(1D)に対応した嵌合部51を有する。この嵌合部51は、3つの凸片51Eと3つの嵌合溝51Dとが交互に形成される。
(Screw stop jig 5)
The screw stopper jig 5 is used by attaching the base side to the wrench body of the torque wrench and fitting the fitting portion on the tip side to the post-construction anchor bush in the prepared hole (H). The fitting portion 51 is composed of a cylindrical portion or a polygonal pillar portion having a diameter smaller than that of the prepared hole (PH), and a protruding portion or a groove portion formed on the tip side thereof. The protrusion or groove has a shape, number and arrangement corresponding to a plurality of notches formed in the base of the post-construction anchor bush. For example, the screw fixing jig shown in FIG. 10 has a fitting portion 51 corresponding to a notch (1D) formed of a three-way groove of the post-construction anchor bush (post-installation anchor bush) of the first embodiment (FIG. 1). In the fitting portion 51, three convex pieces 51E and three fitting grooves 51D are alternately formed.

(後施工アンカー用ブッシュ)
本発明の後施工アンカー用ブッシュは、
アンカー打設の対象躯体(C)に予め設けた下穴(PH)内に設置される後施工アンカー部品セットにおいて、
下穴の穴口部(PH2)内に収容された状態で、前記後施工アンカーセットの一部に取り付け可能な後施工アンカー用ブッシュである。具体的には、本発明の後施工アンカーにおける後施工アンカー用ブッシュ(1)と同じ構成からなる。すなわち、後施工アンカー用ブッシュは具体的には、
アンカーボルトを内挿して螺子固定する中央孔(100)を有した基部回転体(10)と、基部回転体から軸方向先端へ連なる先部回転体(11/12)とからなる一体製材で構成される。
(Bush for post-construction anchor)
The bush for post-construction anchor of the present invention
In the post-construction anchor parts set installed in the pilot hole (PH) provided in advance in the target skeleton (C) for anchor placement,
This is a post-construction anchor bush that can be attached to a part of the post-installation anchor set while being housed in the hole opening portion (PH2) of the prepared hole. Specifically, it has the same configuration as the post-construction anchor bush (1) in the post-construction anchor of the present invention. That is, the bush for the post-construction anchor is specifically
Consists of an integral lumber consisting of a base rotating body (10) having a central hole (100) for inserting and screwing anchor bolts, and a tip rotating body (11/12) extending from the base rotating body to the axial tip. Will be done.

(後施工アンカー部品セット)
後施工アンカー用ブッシュを取り付け可能な後施工アンカー部品セットは、以下の3つの構成からなる。
・下穴(PH)内に全体収容される筒体からなると共に、アンカーコーンによって拡開変形し得る拡開部(21)を筒体の先部に有したアンカー筒体(2)
・先部側へ拡径した拡径体からなり、前記アンカー筒体の筒体の先部に内挿されて下穴(PH)内の穴底部(PH1)に配置されるアンカーコーン(3)
・前記アンカーコーン(3)の基部に同軸連結されたアンカーボルト(4)
この後施工アンカー部品セットは、アンカー筒体(2)が下穴の穴底側へ打ち込まれることで、前記拡開部がアンカーコーンに内側から押圧されて拡開変形し、下穴にアンカリングした係止状態となる。
(Post-construction anchor parts set)
The post-construction anchor parts set to which the post-construction anchor bush can be attached has the following three configurations.
Anchor cylinder (2) that is composed of a cylinder that is entirely housed in a pilot hole (PH) and has an expansion portion (21) that can be expanded and deformed by an anchor cone at the tip of the cylinder.
Anchor cone (3) composed of a diameter-expanded body whose diameter is expanded toward the tip side, inserted into the tip portion of the cylinder body of the anchor cylinder body, and arranged at the hole bottom portion (PH1) in the prepared hole (PH).
Anchor bolts (4) coaxially connected to the base of the anchor cone (3).
In the post-construction anchor parts set, when the anchor cylinder (2) is driven into the hole bottom side of the prepared hole, the expanded portion is pressed by the anchor cone from the inside to expand and deform, and anchoring is performed in the prepared hole. It becomes a locked state.

(圧縮軸力と引っ張り軸力の同時発生)
後施工アンカー部品セットが設置されたアンカリング状態において、
前記中央孔がアンカーボルトの外周に所定の螺子止めトルクで螺子止めされることで、
アンカーボルトのうち穴口部近傍の部分をアンカー打設面(CF)外方へ軸方向に引っ張る引っ張り軸力を、アンカーボルト内部に継続的に発生させると共に、
アンカー筒体の基端面を先部回転体(11/12)で圧接して、アンカー筒体を軸方向へ圧縮する圧縮軸力を、アンカー筒体内部に継続的に発生させることを特徴とする。
(Simultaneous generation of compression axial force and tensile axial force)
In the anchoring state where the post-construction anchor parts set is installed,
The central hole is screwed to the outer circumference of the anchor bolt with a predetermined screwing torque.
A tensile axial force that pulls the part of the anchor bolt near the hole opening outward from the anchor placement surface (CF) in the axial direction is continuously generated inside the anchor bolt, and at the same time.
The base end surface of the anchor cylinder is pressed against the tip rotating body (11/12), and a compression axial force that compresses the anchor cylinder in the axial direction is continuously generated inside the anchor cylinder. ..

以下、本発明の実施形態として示す実施例1〜3の構成と各状態について図面とともに説明する。 Hereinafter, the configurations and states of Examples 1 to 3 shown as embodiments of the present invention will be described with reference to the drawings.

(後施工アンカーの設置方法)
図2(a)〜(c)´及び図3(d)は、実施例1の後施工アンカーの取付け状況を示す、鉛直方向の断面説明図である。これら各図に従って、本発明の後施工アンカー部品セット及び後施工アンカー用ブッシュ、ならびに本発明の後施工アンカーの設置方法の手順を示す。
(Installation method of post-construction anchor)
2 (a) to 2 (c)'and FIG. 3 (d) are vertical cross-sectional explanatory views showing the mounting state of the post-construction anchor of the first embodiment. According to each of these figures, the procedure of the post-construction anchor component set of the present invention, the bush for the post-installation anchor, and the method of installing the post-installation anchor of the present invention is shown.

図2(a)は、後施工アンカー部品セットを、予め形成した下穴(PH)内に収容してセットした第一状態を示す。このときアンカー筒体(2)は基端側すなわちアンカー打設面(CF)方向外方へ突出しており、拡開部21が開いていない初期状態(S1)のままである。図2(a)の第一状態にあるアンカー筒体の基端部2Eを、図示しない筒状の打ち込み具を使って打ちこみ、アンカー筒体(2)を下穴の穴底(PH1)方向へ移動させることで、図2(b)に示す第二状態となる。第二状態では拡開部21が先端側へ強制的に押し込まれることで、拡開部21の内面がアンカーコーン(3)の傾斜面3Tに圧接されて押し曲げられ、拡開した状態となっている。拡開した状態となることで、下穴の穴底部(PH1)付近の穴側面に係止して、後施工アンカーセットがアンカリングされる。 FIG. 2A shows a first state in which the post-construction anchor component set is housed and set in the prepared hole (PH) formed in advance. At this time, the anchor cylinder (2) protrudes outward toward the base end side, that is, in the anchor placing surface (CF) direction, and remains in the initial state (S1) in which the expansion portion 21 is not opened. The base end portion 2E of the anchor cylinder in the first state of FIG. 2A is driven using a tubular driving tool (not shown), and the anchor cylinder (2) is driven in the direction of the hole bottom (PH1) of the prepared hole. By moving it, the second state shown in FIG. 2B is obtained. In the second state, the expansion portion 21 is forcibly pushed toward the tip side, so that the inner surface of the expansion portion 21 is pressed against the inclined surface 3T of the anchor cone (3) and is pushed and bent, resulting in an expanded state. ing. When it is in the expanded state, it is locked to the side surface of the hole near the bottom of the prepared hole (PH1), and the post-construction anchor set is anchored.

図2(c)は、拡開部が拡開した第二状態において、アンカー打設面(CF)の外方へ突出したアンカーボルト(4)の外螺子に、後施工アンカー用ブッシュ(1)すなわち後施工アンカー用ブッシュを螺進させて取り付ける途中の状態を示す。後施工アンカー用ブッシュ(1)の先端の傾斜面(11T)がアンカー筒体(2)の基端部(2E)に接する第三状態(図2(c)´)となるまで、後施工アンカー用ブッシュ(1)を螺進させる。続けて図2(c)´に示すように、後施工アンカー用ブッシュの基端面10Eに形成した三方の切欠き部1Dに螺子止め冶具5の先端の嵌合部を係止させ、螺子止め冶具5の基部に取り付けたトルクレンチで、アンカーボルトの破断応力未満かつアンカー筒体の破断応力未満の所定の螺子止めトルクでトルクコントロールしながら、後施工アンカー用ブッシュ(1)をアンカーボルトに対して螺子止めする。このようにトルク管理で螺子止めすることで、図3に(d)として示すアンカリング状態となる。 FIG. 2C shows a post-installed anchor bush (1) on the outer screw of the anchor bolt (4) protruding outward from the anchor placing surface (CF) in the second state in which the expanded portion is expanded. That is, it shows a state in which the post-installed anchor bush is being screwed and attached. Post-construction anchor until the inclined surface (11T) at the tip of the post-installation anchor bush (1) is in the third state (FIG. 2 (c)') in contact with the base end portion (2E) of the anchor cylinder (2). The bush (1) is screwed. Subsequently, as shown in FIG. 2 (c)', the fitting portion at the tip of the screw fixing jig 5 is locked to the three-sided notch 1D formed in the base end surface 10E of the post-installed anchor bush, and the screw fixing jig 5 is used. With a torque wrench attached to the base of 5, post-installed anchor bush (1) is attached to the anchor bolt while controlling the torque with a predetermined screwing torque that is less than the breaking stress of the anchor bolt and less than the breaking stress of the anchor cylinder. Screw it down. By screwing with torque management in this way, the anchoring state shown as (d) in FIG. 3 is obtained.

図3の状態では、後施工アンカー用ブッシュ(1)が所定以上の螺子止めトルクでアンカーボルト(4)に螺子止めされ、後施工アンカー用ブッシュ(1)の傾斜面(1T)によって、アンカー筒体(2)の基端部(2E)が、下穴の穴底部方向へ圧接され、この圧接力を受けて、アンカー筒体(2)の先端部における拡開部(21)の内面(210S)が、アンカーコーン(3)の拡径した傾斜面(3T)に押し広げられて拡開変形し、拡開部の外周面に形成された周溝21Dが下穴の穴底部付近の穴内周面に圧着したアンカリング状態を保っている。つまりアンカー筒体(2)は、後施工アンカー用ブッシュによる基端部(2E)への圧接力と、アンカーコーン(3)及び下穴内面による拡開部(21)への押圧力及び係止反力とによって、図3に示す軸方向の第二区間(2IL)に亘って、圧縮軸力2IFによる内部応力が発生している。この第二区間(2IL)は、アンカー筒体の基端部2Eを基部側の区間開始点とし、アンカー筒体の拡開部21の内外両面に押圧力を受けて変形した部分の中央部分を先部側の区間終了点として、これら区間開始点と区間終了点とを軸方向と平行な仮想線で繋いだ場合の、当該仮想線の長さを言う(図3)。この第二区間(2IL)は、アンカリング状態でアンカーボルト(4)に引っ張り軸力がかかっている、軸方向の第一区間(4IL)よりも長い区間となっている。 In the state of FIG. 3, the post-installed anchor bush (1) is screwed to the anchor bolt (4) with a screw fixing torque equal to or higher than a predetermined value, and the anchor cylinder is formed by the inclined surface (1T) of the post-installed anchor bush (1). The base end portion (2E) of the body (2) is pressure-welded toward the bottom of the prepared hole, and by receiving this pressure contact force, the inner surface (210S) of the expansion portion (21) at the tip end portion of the anchor cylinder (2). ) Is expanded and deformed by being expanded by the enlarged inclined surface (3T) of the anchor cone (3), and the peripheral groove 21D formed on the outer peripheral surface of the expanded portion is the inner circumference of the hole near the bottom of the prepared hole. The anchoring state that is crimped to the surface is maintained. That is, the anchor cylinder (2) has a pressure contact force to the base end portion (2E) by the post-installed anchor bush, and a pressing force and locking to the expansion portion (21) by the anchor cone (3) and the inner surface of the prepared hole. Due to the reaction force, an internal stress due to the compression axial force 2IF is generated over the second section (2IL) in the axial direction shown in FIG. In this second section (2IL), the base end portion 2E of the anchor cylinder is set as the section start point on the base side, and the central portion of the portion deformed by the pressing force on both the inner and outer sides of the expanded portion 21 of the anchor cylinder is used. As the section end point on the front side, the length of the virtual line when the section start point and the section end point are connected by a virtual line parallel to the axial direction (FIG. 3). This second section (2IL) is longer than the first section (4IL) in the axial direction in which the anchor bolt (4) is subjected to a tensile axial force in the anchored state.

なお、図3における第一区間(4IL)は、後施工アンカー用ブッシュ(1)とアンカーボルト(4)との螺子止め範囲の軸方向中央を区間開始点とし、アンカーコーン(3)とアンカーボルト(4)との螺子連結範囲の軸方向中央を区間終了点として、これら区間開始点と区間終了点とを軸方向と平行な仮想線で繋いだ場合の当該仮想線の長さを言う(図3)。 In addition, in the first section (4IL) in FIG. 3, the section start point is the axial center of the screwing range between the post-installed anchor bush (1) and the anchor bolt (4), and the anchor cone (3) and the anchor bolt. The length of the virtual line when the section start point and the section end point are connected by a virtual line parallel to the axial direction, with the center of the screw connection range with (4) in the axial direction as the section end point (Fig.). 3).

図3において、アンカーボルトに引っ張り軸力がかかった第一区間(4IL)と、アンカー筒体に圧縮軸力がかかった第二区間(2IL)とを比べると、明らかに第一区間(4IL)よりも第二区間(2IL)の方が長くなっている。また、第一区間(4IL)の区間開始点(基部側の区間境界の点)よりも第二区間(2IL)の区間開始点(基部側の区間境界の点)の方が、下穴の穴底部(PH1)側へずれた位置となっていると共に、第一区間(4IL)の区間終了点(先部側の区間境界の点)よりも第二区間(2IL)の区間終了点(先部側の区間境界の点)の方が、下穴の穴底部(PH1)側へずれた位置となっている。このことは、アンカー筒体に掛かる内部応力の範囲が、穴底部付近の周溝21Dの係止領域から、穴口部付近の後施工アンカー用ブッシュとの圧接部までの、比較的長い軸方向の範囲に亘っていることを示している。アンカー筒体とアンカーボルトの双方に内部応力が発生し続けることにより、後施工アンカー全体が高剛性の剛体の役割を果たす。 In FIG. 3, comparing the first section (4IL) in which the tensile axial force is applied to the anchor bolt and the second section (2IL) in which the compression axial force is applied to the anchor cylinder, it is clear that the first section (4IL). The second section (2IL) is longer than that. In addition, the section start point (base side section boundary point) of the second section (2IL) is the pilot hole hole rather than the section start point (base side section boundary point) of the first section (4IL). The position is shifted toward the bottom (PH1) side, and the section end point (front part) of the second section (2IL) is more than the section end point (point of the section boundary on the front side) of the first section (4IL). The point of the section boundary on the side) is located at a position shifted toward the bottom of the pilot hole (PH1). This means that the range of internal stress applied to the anchor cylinder is relatively long in the axial direction, from the locking region of the peripheral groove 21D near the bottom of the hole to the pressure contact portion with the bush for post-construction anchor near the hole opening. It shows that it covers the range. Internal stress continues to be generated in both the anchor cylinder and the anchor bolt, so that the entire post-installed anchor acts as a rigid body with high rigidity.

図3のうち穴口部付近(図3のB−B範囲)の部分拡大図を図4に示す。図4では、アンカー筒体(2)の基端部2Eのうち内周側の1/4厚さ部分が、軸断面視L字状にザグリ加工された内周加工部20Eとなっている。この内周加工部20Eの角部20CEに後施工アンカー用ブッシュの傾斜面11Tが圧接することで、角部20CEが圧潰して面接触した状態となり、アンカー筒体(2)は、角部20CEに面接触する傾斜面11Tの法線方向への内部応力を受ける。 FIG. 4 shows a partially enlarged view of the vicinity of the hole opening (range BB in FIG. 3) in FIG. In FIG. 4, a quarter-thick portion of the base end portion 2E of the anchor cylinder (2) on the inner peripheral side is an inner peripheral processed portion 20E that is counterbored in an L-shape in a axial cross section. When the inclined surface 11T of the post-construction anchor bush is pressed against the corner 20CE of the inner peripheral processing portion 20E, the corner 20CE is crushed and comes into surface contact, and the anchor cylinder (2) is in the corner 20CE. It receives internal stress in the normal direction of the inclined surface 11T that comes into surface contact with the surface.

なお図4に示すアンカリング状態では、アンカー筒体(2)の基端部2Eよりも、後施工アンカー用ブッシュ1の先部回転体11の先端が、穴底部側へ入り込んだ状態となっている。これにより、アンカー打設面(CF)からアンカー筒体(2)の基端部2Eまでの打ち込み距離PH2Lを、後施工アンカー用ブッシュ1の軸方向長さよりも小さ井ものに保つことができる。また、アンカーボルト4と後施工アンカー用ブッシュ1との螺子止め範囲は図4に符号100SLとして示す範囲となり、螺子止め範囲の中央位置は、図4に符号41Fの矢印基点として示す位置となる。後施工アンカー用ブッシュ1が、基部回転体10内から先尖り形状の先部回転体11にかけて内螺子付きの中央孔100を有することで、比較的長い螺子止めの軸方向範囲を確保することができ、また、螺子止め範囲の中央位置がアンカー筒体の基端部により近い位置となる。 In the anchoring state shown in FIG. 4, the tip of the tip rotating body 11 of the post-construction anchor bush 1 is inserted into the hole bottom side rather than the base end portion 2E of the anchor cylinder (2). There is. As a result, the driving distance PH2L from the anchor driving surface (CF) to the base end portion 2E of the anchor cylinder (2) can be kept smaller than the axial length of the post-construction anchor bush 1. Further, the screw fixing range of the anchor bolt 4 and the post-installed anchor bush 1 is the range shown as reference numeral 100SL in FIG. 4, and the central position of the screw fixing range is the position shown as the arrow base point of reference numeral 41F in FIG. The post-construction anchor bush 1 has a central hole 100 with an internal screw from the inside of the base rotating body 10 to the pointed tip rotating body 11, so that a relatively long axial range of the screw stopper can be secured. Also, the center position of the screwing range is closer to the base end of the anchor cylinder.

さらに、図4に示すアンカリング状態では、後施工アンカー用ブッシュ1の基端面10Eがアンカー打設面(CF)よりも穴底部側へ距離PH0分だけ入り込んでいて、アンカー打設面(CF)から後施工アンカー用ブッシュ1が外方へ突出せずに完全に穴内に収容されている。 Further, in the anchoring state shown in FIG. 4, the base end surface 10E of the post-construction anchor bush 1 is inserted into the hole bottom side from the anchor placement surface (CF) by a distance of PH0 minutes, and the anchor placement surface (CF). The post-construction anchor bush 1 is completely housed in the hole without protruding outward.

また、後施工アンカー用ブッシュ1の基部回転体10の周側面10Sが、下穴の穴口部のうち少なくとも下部穴側面に接して、内部応力10IFを受けた状態となっている。後施工アンカー用ブッシュ1のうち周方向へ最も張り出した周側面10Sの部分が穴口部の穴側面に部分的に接することで、下穴の穴底部だけでなく穴口部でもアンカー効果を果たし、より効果的なアンカリングが可能となる。また、後施工アンカー用ブッシュ1の基部回転体10が下穴の穴口部近傍にて、穴側面に接するか僅かな隙間を開けて近接する状態で在設することで、外方のアンカーボルトに曲げ応力がかかった場合でも、後施工アンカーのアンカーボルトの設置軸を、下穴軸と平行に近い並走方向に保つことができる。 Further, the peripheral side surface 10S of the base rotating body 10 of the post-construction anchor bush 1 is in contact with at least the lower hole side surface of the hole opening portion of the prepared hole, and is in a state of receiving an internal stress 10IF. The part of the peripheral side surface 10S that protrudes most in the circumferential direction of the post-construction anchor bush 1 partially contacts the hole side surface of the hole opening, so that the anchor effect is achieved not only at the bottom of the prepared hole but also at the hole opening. Effective anchoring is possible. Further, by installing the base rotating body 10 of the post-installed anchor bush 1 in the vicinity of the hole opening of the prepared hole in a state of being in contact with the side surface of the hole or in a state of being close to each other with a slight gap, the anchor bolt can be attached to the outside. Even when bending stress is applied, the installation axis of the anchor bolt of the post-installed anchor can be maintained in the parallel running direction close to parallel to the pilot hole axis.

また、後施工アンカー用ブッシュ1の基部回転体10が下穴の穴口部近傍にて、穴側面に接するか僅かな隙間を開けて近接する状態で在設すると共に、後施工アンカー用ブッシュ基部からアンカー筒体外方の先端部にかけて内部応力が発生した状態で下穴内にアンカリングすることで、アンカーボルトにねじり応力がかかった場合でも、ねじり応力の影響を後施工アンカーが受けないようにすることができる。 Further, the base rotating body 10 of the post-installed anchor bush 1 is installed in the vicinity of the hole opening of the prepared hole in a state of being in contact with the side surface of the hole or close to the hole with a slight gap, and from the post-installed anchor bush base. By anchoring in the pilot hole with internal stress generated toward the outer tip of the anchor cylinder, even if torsional stress is applied to the anchor bolt, the post-installed anchor will not be affected by the torsional stress. Can be done.

図5は後施工アンカー用ブッシュを後施工アンカー部品セットに取り付けた、実施例1のアンカリング状態の後施工アンカーを示す斜視図である。図5に示すアンカリング状態では、下穴の穴口部内に全収容される後施工アンカー用ブッシュ1、これに圧接するアンカー筒体2、アンカー筒体2の拡開部21の内面に押圧するアンカーコーン3、並びに、アンカーコーン3の連結基部32に螺子連結されて先部側へ伸びると共に後施工アンカー用ブッシュ1によって引っ張り軸力が生じているアンカーボルト4の第一区間部分からなる4つの構成材が、相互に内部応力を生じさせた状態で力学的に釣り合っており、みかけの剛体を形成している。これにより、みかけの剛体を形成した軸方向全体で、一体的なアンカリング効果を生じさせることができる。 FIG. 5 is a perspective view showing the post-construction anchor in the anchored state of the first embodiment in which the post-construction anchor bush is attached to the post-construction anchor component set. In the anchoring state shown in FIG. 5, the post-installed anchor bush 1 that is completely accommodated in the hole opening of the prepared hole, the anchor cylinder 2 that is in pressure contact with the bush 1, and the anchor that presses against the inner surface of the expanded portion 21 of the anchor cylinder 2. Four configurations consisting of the cone 3 and the first section portion of the anchor bolt 4 which is screwed to the connecting base 32 of the anchor cone 3 and extends toward the tip side and a tensile axial force is generated by the post-installed anchor bush 1. The materials are mechanically balanced with each other causing internal stress, forming an apparent rigid body. As a result, an integral anchoring effect can be generated in the entire axial direction in which the apparent rigid body is formed.

(実施例2)
図6は、実施例2の後施工アンカー用ブッシュ(1)(後施工アンカー用ブッシュ)の背面図、側面図、及び軸交断面図を示し、図7は、実施例2の後施工アンカー用ブッシュ(1)(後施工アンカー用ブッシュ)の設置後のアンカリング状態の下穴内の状態説明図(a)並びに軸交断面図(b)を示す。実施例2の後施工アンカー用ブッシュ(1)の基端面1Dには、中央孔100の中心から四方外方へ四本の切欠き部1Dが十字型に形成される。実施例2の後施工アンカー用ブッシュ(1)を穴口部内に螺子止め固定する際は、この切欠き部1Dの十字型形状に対応した、十字又はI字型の嵌合凸部を有する螺子止め冶具5を使用して、所定の螺子止めトルクの螺子止めを行う。
(Example 2)
FIG. 6 shows a rear view, a side view, and an axial cross-sectional view of the post-construction anchor bush (1) (post-construction anchor bush) of the second embodiment, and FIG. 7 is for the post-construction anchor of the second embodiment. The state explanatory view (a) and the axial cross-sectional view (b) in the pilot hole of the anchoring state after installation of the bush (1) (post-construction anchor bush) are shown. On the base end surface 1D of the post-construction anchor bush (1) of the second embodiment, four notches 1D are formed in a cross shape from the center of the central hole 100 to the outside in all directions. When the post-construction anchor bush (1) of the second embodiment is screwed and fixed in the hole opening, the screw stopper has a cross or I-shaped fitting convex portion corresponding to the cross shape of the notch 1D. Using the jig 5, screwing is performed with a predetermined screwing torque.

また、実施例2の後施工アンカー用ブッシュ(1)は、穴口部の穴側面に近接して収容される回転基部10と、回転基部10の先側面10Tから先側へ連なって円柱状に突出形成された先部回転体12とから構成される(図6)。先部回転体12はアンカー筒体の内周面に近接して収容可能な径からなると共に、所定の外螺子区間12Lに亘って外螺子12Sが形成されている。先部回転体12の先端部には、先側へ先尖り形状に窄まった第二の先部回転体11が連なって形成され、その周側面は傾斜面11Tを有すると共に、傾斜面11Tの先側に、軸と直交した先端面11Fを有する。 Further, the post-construction anchor bush (1) of the second embodiment has a rotating base portion 10 housed close to the hole side surface of the hole opening portion and a columnar protrusion connected from the front side surface 10T of the rotating base portion 10 to the front side. It is composed of the formed tip rotating body 12 (FIG. 6). The front rotating body 12 has a diameter that can be accommodated close to the inner peripheral surface of the anchor cylinder, and the outer screw 12S is formed over a predetermined outer screw section 12L. At the tip of the tip rotating body 12, a second tip rotating body 11 narrowed in a pointed shape is formed in a row, and the peripheral side surface thereof has an inclined surface 11T and the inclined surface 11T. On the front side, it has a tip surface 11F orthogonal to the axis.

アンカリング状態を示す図7のように、中央孔100の内螺子区間100Lに亘って形成された内螺子100Sがアンカーボルト4に螺着すると共に、この外螺子12Sが、アンカー筒体2の基端部から一定区間形成された内螺子部22に螺着することで、後施工アンカー用ブッシュ(1)がアンカーボルト(4)とアンカー筒体(2)の両方に所定の螺子止めトルクで螺子止めされる(図7)。そして、この所定の螺子止めトルクの螺子止めによって、回転軸を中心として最も外周方向へ張り出した基部回転体10の先端面10Tが、アンカー筒体(2)の基端部2Eに圧接して、アンカー筒体(2)に圧縮軸力を付与すると共にアンカーボルト4に引っ張り軸力を付与する。 As shown in FIG. 7 showing an anchoring state, the inner screw 100S formed over the inner screw section 100L of the central hole 100 is screwed to the anchor bolt 4, and the outer screw 12S is the base of the anchor cylinder 2. By screwing to the inner screw portion 22 formed in a certain section from the end portion, the post-installed anchor bush (1) is screwed to both the anchor bolt (4) and the anchor cylinder (2) with a predetermined screw fixing torque. It is stopped (Fig. 7). Then, due to the screwing of the predetermined screwing torque, the tip surface 10T of the base rotating body 10 protruding most outwardly from the rotation axis is pressed against the base end 2E of the anchor cylinder (2). A compressive axial force is applied to the anchor cylinder (2) and a tensile axial force is applied to the anchor bolt 4.

(実施例3)
図8は、実施例3の後施工アンカー用ブッシュ(1)の背面図、側面図、及び軸交断面図を示し、図9は、実施例3の後施工アンカー用ブッシュ(1)の設置後のアンカリング状態の下穴内の状態説明図(a)並びに軸交断面図(b)を示す。
(Example 3)
FIG. 8 shows a rear view, a side view, and an axial cross-sectional view of the post-construction anchor bush (1) of the third embodiment, and FIG. 9 shows the post-installation anchor bush (1) of the third embodiment after installation. The state explanatory view (a) and the axial cross-sectional view (b) in the prepared hole of the anchoring state are shown.

実施例3の後施工アンカー用ブッシュ(1)の基部回転体10の側面10Sの一部には、基部回転体10の回転軸を中心とした離反方向(図8における上下方向、図9における左右方向)の各位置に、周側面10Sを平面状に切り欠いた切欠き部1Cが形成される。つまり、基部回転体10の周囲のうち2箇所を切り欠いて、2面の互いに平行な切欠き部1Cが形成される。実施例3の後施工アンカー用ブッシュ(1)を穴口部内に螺子止め固定する際は、この切欠き部1Cの切欠き形状に対応した、部分円型の2つの嵌合凸部を有する螺子止め冶具5を使用して、所定の螺子止めトルクの螺子止めを行う。所定のトルク量の螺子止めによって、回転軸を中心として最も外周方向へ張り出した基部回転体10の先端面10Tが、アンカー筒体(2)の基端部2Eに圧接して、アンカー筒体(2)に圧縮軸力を付与すると共にアンカーボルト4に引っ張り軸力を付与する。 A part of the side surface 10S of the base rotating body 10 of the post-construction anchor bush (1) of the third embodiment has a separation direction (vertical direction in FIG. 8 and left and right in FIG. 9) centered on the rotation axis of the base rotating body 10. Notches 1C are formed at each position in the direction) with the peripheral side surface 10S cut out in a plane. That is, two notches around the base rotating body 10 are cut out to form two notches 1C parallel to each other. When the post-construction anchor bush (1) of the third embodiment is screwed and fixed in the hole opening, the screw stopper has two partially circular fitting protrusions corresponding to the notch shape of the notch 1C. Using the jig 5, screwing is performed with a predetermined screwing torque. By screwing a predetermined amount of torque, the tip surface 10T of the base rotating body 10 protruding most outwardly from the rotation axis is pressed against the base end 2E of the anchor cylinder (2), and the anchor cylinder (2) A compressive axial force is applied to 2) and a tensile axial force is applied to the anchor bolt 4.

また、実施例3の後施工アンカー用ブッシュ(1)は、穴口部の穴側面に近接して収容される基部回転体10と、回転基部10の先側面10Tから先側へ連なって円柱状に突出形成された先部回転体12とから構成される(図8)。さらに、回転基部10と先部回転体12の連接部には、先側へ先尖り形状となるように傾斜した傾斜面11Tが介設される。また、これら基部回転体10、傾斜面11Tの部分、及び先部回転体12の全軸方向には、アンカーボルト4を遊挿入可能な中央孔100が形成される。実施例3の中央孔100には内螺子が形成されていない。先部回転体12はアンカー筒体の内周面に近接して収容可能な径の中実円筒体からなると共に、所定の外螺子区間12Lに亘って外螺子12Sが形成されている。 Further, the post-construction anchor bush (1) of the third embodiment has a columnar shape connected to the base rotating body 10 housed close to the hole side surface of the hole opening portion and the front side surface 10T of the rotating base portion 10 to the front side. It is composed of a protruding tip rotating body 12 (FIG. 8). Further, an inclined surface 11T inclined so as to have a pointed shape is provided in the connecting portion between the rotating base portion 10 and the tip rotating body 12. Further, a central hole 100 into which the anchor bolt 4 can be freely inserted is formed in the base rotating body 10, the portion of the inclined surface 11T, and the tip rotating body 12 in all axial directions. An internal screw is not formed in the central hole 100 of the third embodiment. The front rotating body 12 is formed of a solid cylinder having a diameter that can be accommodated close to the inner peripheral surface of the anchor cylinder, and the outer screw 12S is formed over a predetermined outer screw section 12L.

アンカリング状態を示す図9のように、中央孔100の内部をアンカーボルト4が遊挿入されると共に、先部回転体12の外螺子12Sが、アンカー筒体2の基端部から一定区間に亘って形成された内螺子部22に螺着することで、後施工アンカー用ブッシュ(1)がアンカー筒体に所定の螺子止めトルクで螺子止めされる(図9)。これにより、アンカー筒体2には As shown in FIG. 9 showing the anchoring state, the anchor bolt 4 is loosely inserted inside the central hole 100, and the outer screw 12S of the tip rotating body 12 is set in a certain section from the base end portion of the anchor cylinder 2. By screwing to the inner screw portion 22 formed over the entire structure, the post-installed anchor bush (1) is screwed to the anchor cylinder with a predetermined screwing torque (FIG. 9). As a result, the anchor cylinder 2

<その他の実施の形態>
以上、実施の形態をもとに本発明を説明した。実施の形態は例示であり、本発明の主旨から逸脱しない限り、ネジ部の長さ、ネジ山数、ネジ山形状、或いは断面形状、一体または別体の組合せ構成数の変更、接着材又は固化材の使用をはじめ、上述各実施の形態に対して、さまざまな変更、増減、組合せを加えてもよい。また、各実施例の構成要素同士を抽出して組み合わせるか、各実施例の構成に外螺子部/内螺子部の構成要素、或いは傾斜面の構成要素を追加ないし削除してもよい。
<Other embodiments>
The present invention has been described above based on the embodiments. The embodiment is an example, and as long as it does not deviate from the gist of the present invention, the length of the threaded portion, the number of threads, the thread shape, or the cross-sectional shape, the change in the number of integrated or separate combinations, the adhesive or the solidification Various changes, increases / decreases, and combinations may be made to each of the above-described embodiments, including the use of materials. Further, the components of each embodiment may be extracted and combined, or the components of the outer screw portion / inner screw portion or the components of the inclined surface may be added or deleted from the configuration of each embodiment.

対象躯体(C)
アンカー打設面(CF)
下穴(PH)
穴底部(PH1)
穴口部(PH2)
後施工アンカー用ブッシュ、後施工アンカー用ブッシュ(1)
基部回転体(10)
先部回転体(11/12)
切欠き部(1D/10C)
傾斜面(1T)
中央孔(100)
内螺子(100S)
アンカー筒体(2)
拡開部(21)
内周加工部(20E)
拡開部の内面(210S)
基端部(2E)
第二区間(2IL)
圧縮軸力(2IF)
アンカーコーン(3)
拡径部(31)
連結基部(32)
連結穴(3H)
傾斜面(3T)
アンカーボルト(4)
第一区間(4IL)
引っ張り軸力(4IF)
螺子止め冶具(5)
嵌合部(51E)
Target skeleton (C)
Anchor placement surface (CF)
Pilot hole (PH)
Hole bottom (PH1)
Anaguchi (PH2)
Post-construction anchor bush, post-construction anchor bush (1)
Base rotating body (10)
Tip rotating body (11/12)
Notch (1D / 10C)
Inclined surface (1T)
Central hole (100)
Inner screw (100S)
Anchor cylinder (2)
Expansion part (21)
Inner circumference processing part (20E)
Inner surface of the expansion part (210S)
Base end (2E)
Second section (2IL)
Compression axial force (2IF)
Anchor cone (3)
Diameter expansion part (31)
Connecting base (32)
Connecting hole (3H)
Inclined surface (3T)
Anchor bolt (4)
First section (4IL)
Tension axial force (4IF)
Screw stop jig (5)
Fitting part (51E)

Claims (7)

下穴内に全体収容される筒体からなると共に、アンカーコーンによって拡開変形し得る拡開部を筒体の先部に有したアンカー筒体と、
先部側へ拡径した拡径体からなり、前記アンカー筒体の筒体の先部に内挿されて下穴内の穴底部に配置されるアンカーコーンと、
前記アンカーコーンの基部に同軸連結されたアンカーボルトと、
前記アンカーボルトの外周又はアンカー筒体の内周の少なくともいずれかに所定の螺子止めトルクで螺子止めされ、下穴内の穴口部付近に配置される後施工アンカー用ブッシュと、を備えてなり、
アンカー筒体が下穴の穴底側へ打ち込まれることで、前記拡開部がアンカーコーンに内側から押圧されて拡開変形し、下穴にアンカリングした係止状態において、前記後施工アンカー用ブッシュによってアンカー筒体又はアンカーボルトの少なくともいずれかに軸力を継続的に発生させてなることを特徴とする後施工アンカー。
An anchor cylinder that consists of a cylinder that is entirely housed in a pilot hole and has an expansion portion at the tip of the cylinder that can be expanded and deformed by an anchor cone.
An anchor cone composed of a diameter-expanded body whose diameter is expanded toward the tip side, which is inserted into the tip of the cylinder of the anchor cylinder and is arranged at the bottom of the hole in the prepared hole.
Anchor bolts coaxially connected to the base of the anchor cone,
It is provided with a post-installed anchor bush that is screwed to at least one of the outer circumference of the anchor bolt or the inner circumference of the anchor cylinder with a predetermined screwing torque and is arranged near the hole opening in the prepared hole.
When the anchor cylinder is driven into the bottom side of the prepared hole, the expanded portion is pressed from the inside by the anchor cone to expand and deform, and in the locked state anchored in the prepared hole, for the post-installed anchor. A post-construction anchor characterized in that an axial force is continuously generated on at least one of an anchor cylinder or an anchor bolt by a bush.
前記アンカーコーンの基部中央にはアンカーボルトを螺入して連結する内螺子付きの連結穴が設けられ、また、前記アンカーボルトは、長さ方向全体に亘って外螺子が形成されてなり、
アンカーボルトの外螺子が、下穴内の穴底部付近の連結位置にて、所定の連結トルクで連結穴に螺入連結されると共に、下穴内の穴口部付近の螺子止め位置にて、前記連結トルクと同じかそれ以上の螺子止めトルクで中央孔の内螺子に螺子止めされることで、
前記アンカリング状態において、アンカー筒体の拡開部がアンカーコーンに押圧されると共に、アンカー筒体の基端部が後施工アンカー用ブッシュの先端部と圧接することで、アンカー筒体の軸方向の所定区間に亘って、軸方向の圧縮軸力が内部応力として継続的に発生し、また、
アンカーボルトの前記連結部と螺子止め部との間の第一区間に亘って、所定以上の引っ張り軸力がアンカーボルトの内部応力として継続的に発生することを特徴とする請求項1に記載の後施工アンカー。
A connecting hole with an inner screw for screwing and connecting the anchor bolt is provided in the center of the base of the anchor cone, and the anchor bolt has an outer screw formed over the entire length direction.
The outer screw of the anchor bolt is screwed into the connecting hole with a predetermined connecting torque at the connecting position near the bottom of the hole in the prepared hole, and the connecting torque is connected at the screwing position near the hole opening in the prepared hole. By being screwed to the inner screw of the central hole with the same or higher screwing torque,
In the anchoring state, the expanded portion of the anchor cylinder is pressed against the anchor cone, and the base end portion of the anchor cylinder is in pressure contact with the tip end portion of the post-installed anchor bush, so that the anchor cylinder is axially oriented. Axial compression axial force is continuously generated as internal stress over a predetermined section of.
The first aspect of claim 1, wherein a tensile axial force of a predetermined value or more is continuously generated as an internal stress of the anchor bolt over the first section between the connecting portion of the anchor bolt and the screwing portion. Post-installed anchor.
前記アンカーコーンは、アンカーボルトとの連結穴を基端面に有した柱形状の連結基部と、連結基部から軸方向先端へ連なって先側へ拡径した拡径部とからなる一体製材で構成され、
前記アンカリング状態において、
アンカーボルトには、アンカーボルトの前記連結位置と螺子止め位置との間の軸方向の第一区間に亘って、所定以上の引っ張り軸力が継続的に発生すると共に、
アンカー筒体には、前記第一区間よりも長い軸方向の第二区間に亘って、所定以上の圧縮軸力が継続的に発生することを特徴とする請求項1または2に記載の後施工アンカー。
The anchor cone is composed of an integral lumber composed of a pillar-shaped connecting base having a connecting hole with an anchor bolt on the base end surface, and a diameter-expanded portion connected from the connecting base to the tip in the axial direction and expanded to the front side. ,
In the anchoring state,
Anchor bolts are continuously subjected to a predetermined or greater tensile axial force over the first section in the axial direction between the connecting position of the anchor bolt and the screwing position, and at the same time.
The post-construction according to claim 1 or 2, wherein a compression axial force of a predetermined value or more is continuously generated on the anchor cylinder over a second section in the axial direction longer than the first section. anchor.
前記後施工アンカー用ブッシュは、基部回転体と、基部回転体から軸方向先端へ連なる先部回転体とからなる一体製材で構成され、このうち先部回転体には、先端周囲に亘って、先尖り形状となるように傾斜した傾斜面が形成され、
前記アンカーコーンには、先端側部周囲に亘って、先側へ拡径形状となるように傾斜した傾斜面が形成され、
前記アンカリング状態において、
アンカー筒体の基端面と後施工アンカー用ブッシュの傾斜面とが圧接すると共に、
アンカー筒体の拡開部の内面とアンカーコーンの傾斜面とが圧接することで、
アンカー筒体には所定以上の内部応力が継続的に発生することを特徴とする請求項1、2または3のいずれかに記載の後施工アンカー。
The post-construction anchor bush is composed of an integral sawn body composed of a base rotating body and a tip rotating body extending from the base rotating body to the tip in the axial direction. Among them, the tip rotating body extends around the tip. An inclined surface is formed so as to have a pointed shape,
The anchor cone is formed with an inclined surface that is inclined so as to have an enlarged diameter toward the tip side over the periphery of the tip side portion.
In the anchoring state,
The base end surface of the anchor cylinder and the inclined surface of the post-construction anchor bush are in pressure contact with each other.
By pressing the inner surface of the expanded portion of the anchor cylinder and the inclined surface of the anchor cone,
The post-construction anchor according to any one of claims 1, 2 or 3, wherein an internal stress of a predetermined value or more is continuously generated in the anchor cylinder.
前記アンカー筒体は、筒端形状の基端面のうち内周寄りの一部周方向または全周方向に亘って、内傾斜状又は断面視L字状にザグリ加工された内周加工部を有し、
前記アンカリング状態において、
アンカー筒体の基端面の内周加工部が傾斜面と圧接することで、軸方向と平行でない傾斜方向の圧接反力が継続的に発生することを特徴とする請求項4に記載の後施工アンカー。
The anchor cylinder has an inner peripheral processing portion that is counterbored in an inwardly inclined shape or an L-shaped cross-sectional view over a part of the inner peripheral direction of the base end surface of the tubular end shape toward the inner circumference or the entire circumference direction. And
In the anchoring state,
The post-construction according to claim 4, wherein a pressure contact reaction force in an inclination direction that is not parallel to the axial direction is continuously generated by pressure contacting the inner peripheral processed portion of the base end surface of the anchor cylinder with the inclined surface. anchor.
前記後施工アンカー用ブッシュは、下穴の穴口部内に収容可能な軸交断面の基部回転体と、基部回転体から軸方向先端へ連なる先部回転体とからなる一体製材で構成され、このうち基部回転体の基端面又は側面には、複数の切欠き部が、周方向へ等間隔に設けられ、
前記複数の切欠き部に対応する嵌合部を有した螺子止め冶具によって、所定の螺子止めトルクを付与されることで、前記アンカリング状態となることを特徴とする請求項5に記載の後施工アンカー。
The post-construction anchor bush is composed of an integral lumber composed of a base rotating body having an axial cross section that can be accommodated in the hole opening of the prepared hole and a tip rotating body that is continuous from the base rotating body to the tip in the axial direction. A plurality of notches are provided at equal intervals in the circumferential direction on the base end surface or the side surface of the base rotating body.
After claim 5, the anchoring state is obtained by applying a predetermined screw fixing torque by a screw fixing jig having a fitting portion corresponding to the plurality of notch portions. Construction anchor.
アンカー打設の対象躯体に予め設けた下穴内に設置される後施工アンカー部品セットにおいて、
下穴の穴口部内に収容された状態で、前記後施工アンカーセットの一部に取り付け可能な、後施工アンカー用ブッシュであって、
前記後施工アンカー部品セットは、
下穴内に全体収容される筒体からなると共に、アンカーコーンによって拡開変形し得る拡開部を筒体の先部に有したアンカー筒体と、
先部側へ拡径した拡径体からなり、前記アンカー筒体の筒体の先部に内挿されて下穴内の穴底部に配置されるアンカーコーンと、
前記アンカーコーンの基部に同軸連結されたアンカーボルトと、を具備し、
アンカー筒体が下穴の穴底側へ打ち込まれることで、前記拡開部がアンカーコーンに内側から押圧されて拡開変形し、下穴にアンカリングした係止状態となるものであり、
前記後施工アンカー用ブッシュは、
アンカーボルトを内挿して螺子固定する中央孔を有した基部回転体と、基部回転体から軸方向先端へ連なる先部回転体とからなる一体製材で構成され、
前記アンカリング状態において、
前記中央孔がアンカーボルトの外周に所定の螺子止めトルクで螺子止めされることで、
アンカーボルトのうち穴口部近傍の部分をアンカー打設面外方へ軸方向に引っ張る引っ張り軸力を、アンカーボルト内部に継続的に発生させると共に、
アンカー筒体の基端面を先部回転体で圧接して、アンカー筒体を軸方向に圧縮する圧縮軸力を、アンカー筒体内部に継続的に発生させることを特徴とする、後施工アンカー用ブッシュ。
In the post-construction anchor parts set installed in the pilot hole provided in advance in the target frame for anchor placement,
A bush for a post-construction anchor that can be attached to a part of the post-construction anchor set while being housed in the hole opening of the pilot hole.
The post-construction anchor parts set
An anchor cylinder that consists of a cylinder that is entirely housed in a pilot hole and has an expansion portion at the tip of the cylinder that can be expanded and deformed by an anchor cone.
An anchor cone composed of a diameter-expanded body whose diameter is expanded toward the tip side, which is inserted into the tip of the cylinder of the anchor cylinder and is arranged at the bottom of the hole in the prepared hole.
Anchor bolts coaxially connected to the base of the anchor cone are provided.
When the anchor cylinder is driven into the bottom side of the prepared hole, the expanded portion is pressed from the inside by the anchor cone to expand and deform, and the anchored state is anchored in the prepared hole.
The post-construction anchor bush is
It is composed of an integral lumber consisting of a base rotating body having a central hole for inserting an anchor bolt and fixing it with a screw, and a tip rotating body extending from the base rotating body to the tip in the axial direction.
In the anchoring state,
The central hole is screwed to the outer circumference of the anchor bolt with a predetermined screwing torque.
A tensile axial force that pulls the part of the anchor bolt near the hole opening outward from the anchor placement surface in the axial direction is continuously generated inside the anchor bolt, and at the same time.
For post-construction anchors, which is characterized in that the base end surface of the anchor cylinder is pressed against the tip rotating body to continuously generate a compression axial force that compresses the anchor cylinder in the axial direction inside the anchor cylinder. Bush.
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