JPH0552209A - Enlarging anchor construction method - Google Patents
Enlarging anchor construction methodInfo
- Publication number
- JPH0552209A JPH0552209A JP23388791A JP23388791A JPH0552209A JP H0552209 A JPH0552209 A JP H0552209A JP 23388791 A JP23388791 A JP 23388791A JP 23388791 A JP23388791 A JP 23388791A JP H0552209 A JPH0552209 A JP H0552209A
- Authority
- JP
- Japan
- Prior art keywords
- expansion
- enlarged portion
- mounting hole
- base material
- annular groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Dowels (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はコンクリート構造物、岩
盤などの母材の表面に構造部材などを取付けるための拡
開アンカを施工する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing an expansion anchor for mounting a structural member or the like on the surface of a base material such as a concrete structure or rock.
【０００２】[0002]
【従来の技術】従来、コンクリート構造物、岩盤などの
母材の表面に構造部材などを取付けるための手段の一つ
として、先端に向かって大径となる円錐体を設けたボル
トと、このボルトに嵌装される先端にスリットを形成し
分割された拡開スリーブとを有する拡開アンカが古くか
ら知られており広く用いられている（例えば実公昭２−
５０３５号、米国特許第３０２１７４５号参照）。2. Description of the Related Art Conventionally, a bolt provided with a conical body having a large diameter toward its tip as one means for attaching a structural member or the like to the surface of a base material such as a concrete structure or bedrock, and the bolt. An expansion anchor having a split expansion sleeve formed by forming a slit at the tip end fitted to the has been known for a long time and is widely used (for example, Jikken Sho 2-
5035, U.S. Pat. No. 3,021,745).
【０００３】これらの拡開アンカはコンクリート構造
物、岩盤などの母材に形成された取付孔に差込んでボル
トを基端側へと移動させて円錐体を拡開スリーブの中に
引込むことによってその先端部を取付孔の孔壁に向けて
拡開し、取付孔の孔壁を押圧することで耐引抜き力を発
生させるものである。従って、充分な耐引抜き力を得る
ことができない。These expansion anchors are inserted into a mounting hole formed in a base material such as a concrete structure or bedrock, and the bolt is moved toward the base end side to draw the cone into the expansion sleeve. The tip end portion is expanded toward the hole wall of the mounting hole and the hole wall of the mounting hole is pressed to generate pull-out resistance. Therefore, it is not possible to obtain a sufficient pull-out resistance.
【０００４】そこで、近頃、母材に形成された取付孔に
拡大部を形成し、この拡大部を利用して拡開スリーブを
大きく拡大させることで耐引抜き力の向上を図ることが
行なわれている。Therefore, recently, an enlarged portion is formed in a mounting hole formed in a base material, and the enlargement sleeve is greatly enlarged by utilizing this enlarged portion to improve the pull-out resistance. There is.
【０００５】ところが、従来使用されている拡開アンカ
は図３に示すように拡開スリーブ１ａの先端に形成され
た分割体２ａの外周に例えばローレット加工により複数
の環状溝３ａを長さ方向に並設して分割体２ａの拡開を
容易にするとともに取付孔４ａの孔壁への摩擦の増加を
図るものである。従って、分割体の拡開位置が不規則で
あり、分割体を取付孔４ａの拡大部５ａに合致させて拡
開させることが困難で所定の耐引抜き力を得ることがで
きない場合があるという問題があった。However, as shown in FIG. 3, the conventional expansion anchor has a plurality of annular grooves 3a formed in the longitudinal direction on the outer periphery of the divided body 2a formed at the tip of the expansion sleeve 1a by, for example, knurling. They are arranged side by side to facilitate the expansion of the divided bodies 2a and to increase the friction of the mounting holes 4a against the hole walls. Therefore, the expansion position of the divided body is irregular, and it is difficult to match the divided body with the enlarged portion 5a of the mounting hole 4a to expand the divided body, and it may not be possible to obtain a predetermined pull-out resistance. was there.
【０００６】[0006]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、従来の拡開アンカを用いた施工方法では、
母材に形成された取付孔に形成された拡大部に、前記分
割体を正確に合致させて拡開させることが困難であり、
所定の耐引抜き力を得ることができない場合がある、と
いう点である。SUMMARY OF THE INVENTION The problem to be solved by the present invention is that in the conventional construction method using the expansion anchor,
It is difficult to accurately match and expand the divided body to the enlarged portion formed in the mounting hole formed in the base material,
The point is that it may not be possible to obtain a predetermined pull-out resistance.
【０００７】[0007]
【課題を解決するための手段】本発明は、母材に形成さ
れた取付孔の所定深さ位置に拡大部を形成するととも
に、先端部分に拡開可能な分割体を有し且つ前記分割体
の外周に拡開基端となる環状溝が所定長さ位置に形成さ
れた拡開スリーブを有する拡開アンカを挿入し、前記分
割体を前記拡大部に合致させて拡開させることを特徴と
し、充分な耐引抜き力を確実に得ることができる拡開ア
ンカの施工方法を提供する、という目的を達成する。According to the present invention, an enlarged portion is formed at a predetermined depth position of a mounting hole formed in a base material, and an expandable split body is provided at a tip end portion of the split body. An expansion groove having an expansion sleeve in which an annular groove serving as an expansion base end is formed at a predetermined length position is inserted into the outer periphery of the expansion body, and the divided body is expanded to match the expansion portion, (EN) An object is to provide a method of constructing an expansion anchor capable of reliably obtaining sufficient pull-out resistance.
【０００８】[0008]
【作用】取付孔のに形成した拡大部の基端と、拡開アン
カの分割体の外周に拡開基端となる環状溝とを一致さ
せ、分割体を前記拡大部に合致させて拡開させる。The base end of the enlarged portion formed in the mounting hole is aligned with the annular groove serving as the base end of the enlarged portion on the outer periphery of the divided body of the expansion anchor, and the divided body is expanded to match the enlarged portion. ..
【０００９】[0009]
【実施例】本発明の実施例を図面に基づいて説明する
と、図１および図２は本発明の一実施例を示すものであ
り、先ず、図１（ａ）に示すようにコンクリート、岩盤
その他の母材１に電動ドリルなどを用いて所定径ならび
に所定深さの均一径を有する基孔２１を形成するととも
に従来公知の中ぐり工具を用いて所定の深さ（ｈ）位置
に拡開部２２を形成して取付孔２とする。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 show an embodiment of the present invention. First, as shown in FIG. A base hole 21 having a predetermined diameter and a uniform diameter of a predetermined depth is formed in the base material 1 using an electric drill or the like, and at the same time, a widening portion is formed at a predetermined depth (h) position using a conventionally known boring tool. 22 is formed to be a mounting hole 2.
【００１０】次いで、図２に示すように、先端に向かっ
て大径となる円錐体３１を設けたボルト３と、このボル
ト３２に嵌装される先端に開放したスリット４１よって
分割体４２が形成されいるとともに分割体４２の外周に
拡開基端となる環状溝４３が基端から取付孔２の拡開部
２１までの深さ（ｈ）に等しい長さ（Ｌ）位置に形成さ
れた拡開スリーブ４とを有し、ボルト３の基端に座金５
を介してナット６が螺装されている拡開アンカＡを、図
１（ｂ）に示すように座金５を母材１の表面１１に当接
させて取付孔２に差込む。Next, as shown in FIG. 2, a divided body 42 is formed by a bolt 3 provided with a conical body 31 having a large diameter toward the tip, and a slit 41 opened at the tip fitted into the bolt 32. And an annular groove 43 serving as an expanding base end on the outer periphery of the divided body 42 formed at a position (L) equal to the depth (h) from the base end to the expanding portion 21 of the mounting hole 2. A sleeve 4 and a washer 5 at the base end of the bolt 3.
As shown in FIG. 1 (b), the washer 5 is brought into contact with the surface 11 of the base material 1 and the expansion anchor A having the nut 6 screwed thereinto is inserted into the mounting hole 2.
【００１１】このとき、拡開スリーブ４の基端から環状
溝４３までの長さ（Ｌ）が基孔２の母材１の表面１１か
ら拡開部２１までの深さ（ｈ）に等しいため、環状溝４
３が拡開部２１に合致するので、ナット６を回転させて
ボルト３を基端側へと移動させて円錐体３１を拡開スリ
ーブ４の中に引込むと、図１（ｃ）に示すように分割体
４２が環状溝４３を基端として拡開部２１の孔壁に向け
て拡開する。At this time, the length (L) from the base end of the expanding sleeve 4 to the annular groove 43 is equal to the depth (h) from the surface 11 of the base material 1 of the base hole 2 to the expanding portion 21. , Annular groove 4
Since 3 matches the expanding portion 21, when the nut 6 is rotated to move the bolt 3 to the proximal end side and the cone 31 is drawn into the expanding sleeve 4, as shown in FIG. Then, the split body 42 expands toward the hole wall of the expanding portion 21 with the annular groove 43 as the base end.
【００１２】本実施例によれば、所定深さ位置に拡大部
２２を形成した取付孔２に、拡開基端となる環状溝４３
が所定長さ位置に形成された拡開スリーブ４を有する拡
開アンカＡを挿入し、分割体４２を拡大部２２に合致さ
せて拡開させるため、分割体４２が大きく拡開し、確実
且つ充分な耐引抜き力を得ることができるものである。According to this embodiment, in the mounting hole 2 having the enlarged portion 22 formed at the predetermined depth position, the annular groove 43 serving as the enlarged base end is formed.
Since the expansion anchor A having the expansion sleeve 4 formed at the predetermined length position is inserted and the divided body 42 is expanded by being matched with the enlarged portion 22, the divided body 42 is greatly expanded, and the divided body 42 is surely and reliably. It is possible to obtain a sufficient pull-out resistance.
【００１３】[0013]
【発明の効果】本発明によると、所定深さ位置に拡大部
を形成した取付孔に、拡開基端となる環状溝が所定長さ
位置に形成された拡開スリーブを有する拡開アンカを挿
入し、分割体を拡大部に合致させて拡開させるため、分
割体が所定の拡開位置まで確実に拡開し、充分な耐引抜
き力を得ることができるものである。According to the present invention, the expansion anchor having the expansion sleeve in which the annular groove serving as the expansion base end is formed at the predetermined length position is inserted into the mounting hole having the expansion portion formed at the predetermined depth position. However, since the divided body is expanded to match the enlarged portion, the divided body can be surely expanded to a predetermined expanded position and a sufficient pull-out resistance can be obtained.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施例を示す説明図である。FIG. 1 is an explanatory diagram showing an embodiment of the present invention.
【図２】図１に示した実施例に使用される拡開アンカを
示す正面図である。FIG. 2 is a front view showing a spread anchor used in the embodiment shown in FIG.
【図３】従来例を示す説明図である。FIG. 3 is an explanatory diagram showing a conventional example.
１ 母材 ２ 取付孔 ４ 拡開スリーブ ２２ 拡大部 ４２ 分割体 ４３ 環状溝 Ａ 拡開アンカ 1 Base Material 2 Mounting Hole 4 Expanding Sleeve 22 Expanding Part 42 Dividing Body 43 Annular Groove A Expanding Anchor
Claims (1)
に拡大部を形成するとともに、先端部分に拡開可能な分
割体を有し且つ前記分割体の外周に拡開基端となる環状
溝が所定長さ位置に形成された拡開スリーブを有する拡
開アンカを挿入し、前記分割体を前記拡大部に合致させ
て拡開させることを特徴とする拡開アンカの施工方法。1. An enlarged portion is formed at a predetermined depth position of a mounting hole formed in a base material, and a tip end portion has an expandable split body, and an expandable base end is provided on the outer periphery of the split body. A method for constructing an expansion anchor, comprising inserting an expansion anchor having an expansion sleeve in which an annular groove is formed at a predetermined length position, and expanding the divided body so as to match the expanded portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23388791A JPH0552209A (en) | 1991-08-21 | 1991-08-21 | Enlarging anchor construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23388791A JPH0552209A (en) | 1991-08-21 | 1991-08-21 | Enlarging anchor construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0552209A true JPH0552209A (en) | 1993-03-02 |
Family
ID=16962121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23388791A Pending JPH0552209A (en) | 1991-08-21 | 1991-08-21 | Enlarging anchor construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0552209A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021075971A (en) * | 2019-11-13 | 2021-05-20 | 株式会社ケー・エフ・シー | Fall prevention structure and construction method of the same |
-
1991
- 1991-08-21 JP JP23388791A patent/JPH0552209A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021075971A (en) * | 2019-11-13 | 2021-05-20 | 株式会社ケー・エフ・シー | Fall prevention structure and construction method of the same |
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