WO2022163742A1 - Anchor bolt and method for installing same - Google Patents

Anchor bolt and method for installing same Download PDF

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Publication number
WO2022163742A1
WO2022163742A1 PCT/JP2022/003022 JP2022003022W WO2022163742A1 WO 2022163742 A1 WO2022163742 A1 WO 2022163742A1 JP 2022003022 W JP2022003022 W JP 2022003022W WO 2022163742 A1 WO2022163742 A1 WO 2022163742A1
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Prior art keywords
bolt
fixing hole
anchor bolt
tip
locking ring
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PCT/JP2022/003022
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French (fr)
Japanese (ja)
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晃 三宅
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晃 三宅
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Publication of WO2022163742A1 publication Critical patent/WO2022163742A1/en

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/58—Connections for building structures in general of bar-shaped building elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve

Definitions

  • the present invention relates to anchor bolts, and more particularly to anchor bolts that are not displaced by load and construction methods thereof.
  • Anchor bolts are used to secure structures to concrete.
  • the anchor bolt disclosed in Japanese Patent Application Laid-Open No. 10-184627 uses a bolt having a head with a tapered tip and a large diameter.
  • a sleeve having an expansion piece provided with a slit dividing the peripheral wall into a plurality of parts in the axial direction is inserted through the bolt, and the expansion piece corresponds to the taper of the head.
  • a sleeve having an axial slit formed in the tip end portion to form an expanded portion is inserted through the bolt, and a tapered cone nut is provided at the tip end thereof. is inserted.
  • the cone nut bites into the extension and widens the extension.
  • the expansion part expands from the shallow side to the deep side of the fixing hole. Therefore, when a large tensile force is applied from the outside in the axial direction, the bolt may come off. Needless to say, the state of the fixing holes at the time of construction, aging deterioration of concrete and metal, etc., have a great influence.
  • Fig. 9 shows an anchor bolt that realizes a structure in which the expansion part expands from the deep side to the shallow side of the fixing hole.
  • the direction of the screw is opposite to the front end side 61 and the rear end side 62 of the bolt 60, and the expansion ring 65 is fitted to the front end side 61 with the expansion portion facing the rear end direction of the bolt.
  • insert a nut 66 with a male taper at the tip When a hexagonal wrench is inserted from the nut 66 side and the bolt 60 is rotated in the direction in which the expansion ring 65 and the nut 66 abut their front and rear ends, the male taper 68 at the tip of the nut 66 is pushed into the expansion ring 65.
  • the expansion ring 66 bites into the female taper 67 formed at the rear end of the fixing hole, forming a state in which the expansion ring 66 opens toward the mouth of the fixing hole, thereby preventing the bolt from coming off.
  • Adhesive anchors have also been used for some time.
  • the configuration shown in FIG. 9 has a structure in which the front end and rear end of the bolt are threaded in opposite directions, and when the bolt is rotated, the expansion ring and the nut move in opposite directions.
  • the ring does not co-rotate with the rotation of the bolt, and spreads from the back of the fixing hole toward the front. Therefore, although the above-mentioned inconvenience is improved, it is troublesome in construction in that it is necessary to cut threads in opposite directions at the front end side and the rear end side of the bolt. There is a drawback that it takes too much.
  • the adhesive anchor relies only on the chemical strength of the adhesive without the anchor member forming a bridge (crosslinking) in the fixing hole. Service life is a problem because the adhesives can deteriorate over time.
  • the present invention has been proposed in view of the above conventional circumstances, and an object of the present invention is to provide an anchor bolt that forms a bridge within a fixing hole and does not cause displacement under load, and a method of installing the anchor bolt.
  • the anchor bolt of the present invention comprises the following bolt and locking ring.
  • a brim-shaped stop is provided at the tip of the bolt, and a locking ring provided with a plurality of open leg pieces bent outward from the base end of the ring contacts the stop of the bolt at the base end. It is inserted into the bolt so that it touches.
  • both the width and the thickness of the tip of the split leg piece are sharpened.
  • a single locking ring exhibits sufficient strength, but greater strength can be obtained by using a plurality of them via spacers.
  • the construction of the anchor bolt of the present invention is carried out according to the following procedure using a hammering jig and a screwing jig.
  • a fixing hole is opened.
  • the bolt with the locking ring inserted therein is inserted into the fixing hole with the contact stopper as the tip.
  • the leg piece is further opened using a jig (striking jig, screwing jig), and the tip of the leg piece is bitten into the wall of the fixing hole to form a bridge.
  • the gap between the fixing hole and the bolt can be filled with adhesive or can be filled with a bush.
  • the tip of the leg piece reliably bites into the peripheral wall of the fixing hole to form a bridge, so that it exhibits a strong anchoring function. High strength is obtained. Also, the gap between the fixing hole and the bolt can be filled with an adhesive or by inserting a bush. Furthermore, by increasing or decreasing the number of locking rings, it is possible to meet the required strength.
  • FIG. 1 is a side view showing an anchor bolt of the present invention
  • FIG. It is a side view which shows the jig
  • It is a flowchart which shows the construction procedure of this invention.
  • It is a figure which shows the processing state of the space
  • It is a photograph which shows the construction state of this invention.
  • It is a photograph showing the construction state of the present invention and the state of the fixing hole after the anchor bolt is removed.
  • It is a figure which shows another construction example of this invention.
  • It is a figure which shows another construction procedure of this invention.
  • It which shows an example of the conventional anchor.
  • FIG. 1 shows an anchor bolt of the present invention
  • FIG. 1(a) is a side view
  • FIG. 1(b) is a sectional view of a locking ring that constitutes the anchor bolt of the present invention.
  • a lock ring described below is inserted into the bolt to form an anchor bolt before construction.
  • the locking ring 2 has a plurality of (five lobes in the drawing) split leg pieces 22 with a predetermined width at equal intervals in the circumferential direction from a base end ring 21 in the radial direction. It is designed to spread out. Further, the width in the circumferential direction of each open leg piece 22 is tapered from the center to the tip, and the tip is pointed in a triangular shape. Since the number of the split leg pieces 22 is set to an odd number, the cross-sectional view of FIG. 1(b) is not symmetrical.
  • a stopper 11 is provided at the tip of the bolt 1 , and the base end ring 21 of the locking ring 2 is inserted so as to face the stopper 11 side.
  • a simple anchor bolt 10 is constructed.
  • the driving jig 4 has a driving portion 41 at the tip of which has an outer diameter that fits into the fixing hole 3 described below, and a bolt hole 42 that has a diameter and depth that allows the bolt 1 to fit in the axial direction, extending from the tip to the rear end. placed towards the side. Furthermore, the rear end serves as a driving head 43 .
  • FIG. 3 is a diagram showing the procedure for installing the anchor bolts.
  • a fixing hole 3 is drilled in the construction site of the concrete structure.
  • the diameter of the fixing hole 3 is such that the leg opening piece 22 of the locking ring 2 inserted into the bolt 1 can be accommodated before construction. is smaller than the diameter of
  • the anchor bolt 10 is inserted into the fixing hole 3 so that the stopper 11 side is the leading end (back side of the fixing hole 3) and hits the bottom (Fig. 3(b)).
  • the open leg piece 22 has a sharp tip that breaks into the peripheral wall of the fixing hole 3 and bites into it to form a bridge, which is firmly fixed. It should be noted that if the front end surface of the driving jig 4 is formed into a shape that is gradually widened with a large outer diameter, and the shape is similar to the initial widened shape of the leg pieces 22, when the driving jig 4 is driven as described above, In addition, the open leg piece 22 can be easily opened.
  • the gap between the fixing hole 3 and the bolt 1 is filled with an adhesive R to obtain a metal anchor having higher strength.
  • the adhesive R may be filled after the metal bush B is inserted.
  • the metal bush B is threaded into the bolt 1 with an internal thread.
  • FIG. 5 is a photograph showing a state in which the anchor bolt 10 of the present invention is driven into the fixing hole 3 by cutting the fixing hole 3 in the axial direction. As described above, it can be confirmed that the tip of the open leg piece 22 is opened from the fixing hole 3 and bites into the hole wall.
  • the photograph in FIG. 6 shows a state in which the anchor bolt 10 is removed from the state in which the fixing hole 3 is cut in the axial direction as in FIG. It can be confirmed that a hole 31 is formed after the tip of the leg piece 22 bites into the hole wall of the fixing hole 3 .
  • FIG. 7 illustrates a case where a plurality of locking rings 2 are used.
  • the locking ring 2 on the front end side inserted into the bolt 1 is driven by the driving jig 4 to be fixed in the fixing hole 3, and then the locking ring 2 on the rear end side is inserted through the bush-like spacer 23. is inserted, and the split leg piece 22 is widened by the driving jig 4 in the same manner as described above.
  • the fixing strength will be higher than in the case where there is only one locking ring 2.
  • the split leg piece 22 is widened by the driving jig 4, but as shown in FIG.
  • the split leg piece 22 may be widened by inserting the driving jig 4 from the rear end side of the spacer 23 and driving the spacer 23 .
  • the locking ring 2 on the rear end side can be subsequently inserted.
  • a screwing jig 5 shown in FIG. 2(b) can be used instead of the driving jig 4. That is, it is a structure in which the screwed nut 51 can be fitted into the fitting hole 52 at the tip.
  • the tip side of the screw-in nut 51 has a shape in which the outer diameter is greatly curved and widened so that the shape matches the opening condition of the leg pieces 22 .
  • the tip of the open leg piece of the locking ring constituting the anchor bolt bites into the peripheral wall of the fixing hole, when a strong load is applied, the tip further bites into the concrete and is not displaced by the load. You can accept it, and you can't get out of it.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Dowels (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

Provided are an anchor bolt that is not displaced under load and a method for installing the same. This bolt has a tip provided with a flange-shaped abutment stop, and a lock ring provided with a plurality of expansion pieces recurved and opened from an annular base end of the lock ring toward the outer side is inserted over this bolt such that the base end side is abutted against the abutment stop of the bolt. This structure makes this bolt function as an anchor bolt which bites the tips of the expansion pieces into a peripheral wall of a fixing hole when the expansion pieces are further opened by the installation. The tips of the expansion pieces are made to be acuter both in width and thickness. The lock ring produces higher strength when a plurality of lock rings are used with intermediation of spacers.

Description

アンカーボルトとその施工方法Anchor bolt and its construction method
　本発明はアンカーボルトに関し、特に、荷重に対する変位がないアンカーボルトとその施工方法に関する。 The present invention relates to anchor bolts, and more particularly to anchor bolts that are not displaced by load and construction methods thereof.
　コンクリートに対して、構造物を固定する際にアンカーボルトが用いられる。 Anchor bolts are used to secure structures to concrete.
　特開平１０－１８４６２７号公報に開示するアンカーボルトは、先端がテーパ状に径が大きくなったヘッドを持ったボルトを使用している。前記ボルトに対して、先端部に軸方向に周壁を複数分割するスリットが設けられた拡張片を備えたスリーブが挿通され、前記ヘッドのテーパに前記拡張片が対応する構成としている。 The anchor bolt disclosed in Japanese Patent Application Laid-Open No. 10-184627 uses a bolt having a head with a tapered tip and a large diameter. A sleeve having an expansion piece provided with a slit dividing the peripheral wall into a plurality of parts in the axial direction is inserted through the bolt, and the expansion piece corresponds to the taper of the head.
　上記の構成によって、ボルトがナットで引き上げられると、前記テーパを持ったヘッドが拡張片に食い込んで、当該拡張片の径が固定孔の中で拡大して、アンカーボルトは固定孔に固定されることになる。 With the above configuration, when the bolt is pulled up by the nut, the tapered head bites into the expansion piece, the diameter of the expansion piece expands in the fixing hole, and the anchor bolt is fixed in the fixing hole. It will be.
　特開２０１７－９６４７０号公報に開示するアンカーボルトは、ボルトに対して、先端部に軸方向にスリットが入れられ拡張部となしたスリーブが挿通され、更に、その先端にテーパ状のコーンナットが挿通されている。これによって、ボルトを後端で回すと、前記コーンナットが、前記拡張部に食い込んで、当該拡張部を広げる構成になっている。 In the anchor bolt disclosed in Japanese Patent Application Laid-Open No. 2017-96470, a sleeve having an axial slit formed in the tip end portion to form an expanded portion is inserted through the bolt, and a tapered cone nut is provided at the tip end thereof. is inserted. As a result, when the bolt is turned at the rear end, the cone nut bites into the extension and widens the extension.
　以上の２例は、いずれも固定孔の浅い方から深い方に向かって拡張部が拡大する。従って、外から軸方向に大きな引っ張り力が掛かったときには、ボルトが抜ける恐れがある。施工時の前記固定孔の状態、コンクリートや金属の経年劣化等が大いに影響することは勿論である。 In both of the above two examples, the expansion part expands from the shallow side to the deep side of the fixing hole. Therefore, when a large tensile force is applied from the outside in the axial direction, the bolt may come off. Needless to say, the state of the fixing holes at the time of construction, aging deterioration of concrete and metal, etc., have a great influence.
　図９は、固定孔の深い方から浅い方に向かって拡張部が拡大する構造を実現したアンカーボルトである。 Fig. 9 shows an anchor bolt that realizes a structure in which the expansion part expands from the deep side to the shallow side of the fixing hole.
　ボルト６０の先端側６１と後端側６２でネジの方向を逆に形成しておき、先端側６１に前記拡張リング６５を、前記拡張部をボルトの後端方向に向けて嵌め込み、後端側６２から、先端に雄テーパを備えたナット６６を挿入する。六角レンチを前記ナット６６側から挿入して、前記ボルト６０を前記拡張リング６５とナット６６が互いに先後端を突き合わす方向に回転させると、前記ナット６６の先端の雄テーパ６８は前記拡張リング６５の後端に形成した雌テーパ６７に食い込んで、拡張リング６６が固定孔の口方向に開いた状態を形成することができ、ボルトの抜け落ちを防止することができる。 The direction of the screw is opposite to the front end side 61 and the rear end side 62 of the bolt 60, and the expansion ring 65 is fitted to the front end side 61 with the expansion portion facing the rear end direction of the bolt. From 62, insert a nut 66 with a male taper at the tip. When a hexagonal wrench is inserted from the nut 66 side and the bolt 60 is rotated in the direction in which the expansion ring 65 and the nut 66 abut their front and rear ends, the male taper 68 at the tip of the nut 66 is pushed into the expansion ring 65. The expansion ring 66 bites into the female taper 67 formed at the rear end of the fixing hole, forming a state in which the expansion ring 66 opens toward the mouth of the fixing hole, thereby preventing the bolt from coming off.
　更に、施工コンクリート母材に穿孔した孔に、予め接着剤（注入式、カプセル式）を充填しアンカー本体を打ち込んだ状態で、前記接着剤を硬化させることにより、定着部を物理的に固着させる接着系アンカーも従前から使用されている。 Furthermore, in a state in which an adhesive (injection type, capsule type) is pre-filled into a hole drilled in the construction concrete base material and the anchor body is driven in, the adhesive is cured to physically fix the fixing portion. Adhesive anchors have also been used for some time.
特開平１０－１８４６２７号公報JP-A-10-184627 特開２０１７－９６４７０号公報JP 2017-96470 A
　前記したように、特許文献１、特許文献２に示す構造は、拡張部の径が、固定孔の奥に向かって広がるようになっているので、固定孔の施工に不具合がある場合や、経年的なコンクリートの劣化、金属の劣化にともない抜けやすくなり、大事故に繋がりかねない危険性がある。 As described above, in the structures disclosed in Patent Documents 1 and 2, the diameter of the expansion portion widens toward the depth of the fixing hole. There is a danger that it will become easier to come off due to the deterioration of concrete and metal, which may lead to a serious accident.
　たとえ事故が発生しなくても、荷重がかかったときに、ボルトが荷重方向に若干変位するいわゆる変位荷重が生じる。 Even if an accident does not occur, when a load is applied, a so-called displacement load occurs, in which the bolt is slightly displaced in the direction of the load.
　図９に示した構成は、ボルトの先端側と後端側で逆方向にネジを切って、当該ボルトを回転させると拡張リングと、ナットが逆方向に進行する構造になっているので、拡張リングは、ボルトの回転に伴う供回りもなく、固定孔の奥から手前に向かって広がるようになっている。従って、前記した不都合は改善されるが、ボルトの先端側と後端側で逆方向にネジを切る必要がある点で、施工上の煩わしさがあり、ひいてはコストデメリットとなり、製品化にもコストが掛かり過る欠点がある。 The configuration shown in FIG. 9 has a structure in which the front end and rear end of the bolt are threaded in opposite directions, and when the bolt is rotated, the expansion ring and the nut move in opposite directions. The ring does not co-rotate with the rotation of the bolt, and spreads from the back of the fixing hole toward the front. Therefore, although the above-mentioned inconvenience is improved, it is troublesome in construction in that it is necessary to cut threads in opposite directions at the front end side and the rear end side of the bolt. There is a drawback that it takes too much.
　前記接着系アンカーは、固定孔の中でアンカー部材がブリッジ（架橋）を形成することなく、接着剤による化学的な強度にのみ依存する。前記接着剤は経年劣化するおそれがあることから、耐用年数に問題がある。 The adhesive anchor relies only on the chemical strength of the adhesive without the anchor member forming a bridge (crosslinking) in the fixing hole. Service life is a problem because the adhesives can deteriorate over time.
　本発明は上記従来の事情に鑑みて提案されたものであって、固定孔内でブリッジを形成し、荷重に対して変位を生じないアンカーボルトとその施工方法を提供することを目的とする。 The present invention has been proposed in view of the above conventional circumstances, and an object of the present invention is to provide an anchor bolt that forms a bridge within a fixing hole and does not cause displacement under load, and a method of installing the anchor bolt.
　本発明のアンカーボルトは、以下のボルトと係止環を備える。 The anchor bolt of the present invention comprises the following bolt and locking ring.
　ボルトの先端に鍔状の当たり止めが設けられており、環状の基端から外側に反り返って開いた複数の開脚片を備えた係止環が、前記基端側が前記ボルトの当たり止めに当接するようにボルトに挿入される。 A brim-shaped stop is provided at the tip of the bolt, and a locking ring provided with a plurality of open leg pieces bent outward from the base end of the ring contacts the stop of the bolt at the base end. It is inserted into the bolt so that it touches.
　この構成によって、施工によって前記開脚片が開いたとき、開脚片の先端が固定孔の周壁に食い込んでアンカーボルトとして機能することになる。 With this configuration, when the leg piece is opened by construction, the tip of the leg piece bites into the peripheral wall of the fixing hole and functions as an anchor bolt.
　前記開脚片の先端は幅、厚みとも尖鋭化されることが好ましい。 It is preferable that both the width and the thickness of the tip of the split leg piece are sharpened.
　前記係止環は単一でも十分な強度を発揮するが、スペーサーを介して複数使用することで、より大きな強度を得ることができる。 A single locking ring exhibits sufficient strength, but greater strength can be obtained by using a plurality of them via spacers.
　本発明のアンカーボルトを施工するについては、叩き込み治具、捻じ込み治具を用いて、以下の手順でなされる。 　The construction of the anchor bolt of the present invention is carried out according to the following procedure using a hammering jig and a screwing jig.
　まず、固定孔が開けられる。次いで、前記の係止環を挿入したボルトを、前記当たり止めを先端にして前記固定孔に挿入する。前記開脚片が治具（叩き込み治具、捻じ込み治具）を用いて更に開かれ、当該開脚片の先端を前記固定孔の壁に食い込ませてブリッジを形成する。 First, a fixing hole is opened. Next, the bolt with the locking ring inserted therein is inserted into the fixing hole with the contact stopper as the tip. The leg piece is further opened using a jig (striking jig, screwing jig), and the tip of the leg piece is bitten into the wall of the fixing hole to form a bridge.
　前記固定孔とボルトの間の空隙に接着剤を充填すること、あるいはブッシュを入れて埋めることができる。 The gap between the fixing hole and the bolt can be filled with adhesive or can be filled with a bush.
　上記では単一の係止環しか用いていないが、更に、スペーサーを介して別の前記係止環と同じ構造の係止環を挿入し、治具を用いてその開脚片を開いて、前記固定孔の周壁に食い込ませることも可能である。 Although only a single locking ring is used above, another locking ring having the same structure as the locking ring is inserted through a spacer, and its open leg pieces are opened using a jig, It is also possible to make it bite into the peripheral wall of the fixing hole.
　本発明は、開脚片の先端が確実に固定孔の周壁に食い込んでブリッジを形成しているので強固なアンカー機能を呈し、荷重がかかったときの変位は無いばかりか、更にコンクリートに食い込み、高い強度が得られることになる。また、前記固定孔とボルトの間の空隙には、接着剤を充填、あるいはブッシュを挿入することで埋めることができる。更に、係止環の数を増減させることで、要求される強度に対応することができる。 In the present invention, the tip of the leg piece reliably bites into the peripheral wall of the fixing hole to form a bridge, so that it exhibits a strong anchoring function. High strength is obtained. Also, the gap between the fixing hole and the bolt can be filled with an adhesive or by inserting a bush. Furthermore, by increasing or decreasing the number of locking rings, it is possible to meet the required strength.
本発明のアンカーボルトを示す側面図である。1 is a side view showing an anchor bolt of the present invention; FIG. 本発明に使用する治具を示す側面図である。It is a side view which shows the jig|tool used for this invention. 本発明の施工手順を示すフロー図である。It is a flowchart which shows the construction procedure of this invention. アンカーボルトと固定孔の空隙の処理状態を示図である。It is a figure which shows the processing state of the space|gap of an anchor bolt and a fixing hole. 本発明の施工状態を示す写真である。It is a photograph which shows the construction state of this invention. 本発明の施工状態であり、アンカーボルトを取り去った後の固定孔の状態を示す写真である。It is a photograph showing the construction state of the present invention and the state of the fixing hole after the anchor bolt is removed. 本願発明の別の施工例を示す図である。It is a figure which shows another construction example of this invention. 本発明の別の施工手順を示す図である。It is a figure which shows another construction procedure of this invention. 従来のアンカーの一例を示す図である。It is a figure which shows an example of the conventional anchor.
　図１は本発明のアンカーボルトを示し、図１（ａ）は側面図、図１（ｂ）は本発明のアンカーボルトを構成する係止環の断面図である。 FIG. 1 shows an anchor bolt of the present invention, FIG. 1(a) is a side view, and FIG. 1(b) is a sectional view of a locking ring that constitutes the anchor bolt of the present invention.
　まず、図１に示すように、ボルトに以下に説明する係止環が挿入され、施工前のアンカーボルトが構成される。 First, as shown in Fig. 1, a lock ring described below is inserted into the bolt to form an anchor bolt before construction.
　前記係止環２は図１（ｂ）に示すように、基端環２１から、円周方向に等間隔に所定幅の複数（図面上は５葉）の開脚片２２が、径方向に広がるように設けられている。更に、各開脚片２２の円周方向の幅は、中央部から先端に行く程細く三角形状に先端が尖がっており、また、厚み方向の厚みも先端に行く程薄くなっている。尚、開脚片２２の数を奇数に設定しているので、図１（ｂ）の断面図は左右対称にはならない。 As shown in FIG. 1(b), the locking ring 2 has a plurality of (five lobes in the drawing) split leg pieces 22 with a predetermined width at equal intervals in the circumferential direction from a base end ring 21 in the radial direction. It is designed to spread out. Further, the width in the circumferential direction of each open leg piece 22 is tapered from the center to the tip, and the tip is pointed in a triangular shape. Since the number of the split leg pieces 22 is set to an odd number, the cross-sectional view of FIG. 1(b) is not symmetrical.
　図１（ａ）に示すように、ボルト１の先端には当たり止め１１が設けられ、前記係止環２の基端環２１が前記当たり止め１１側になるように挿入され、施工前の最もシンプルなアンカーボルト１０が構成される。 As shown in FIG. 1( a ), a stopper 11 is provided at the tip of the bolt 1 , and the base end ring 21 of the locking ring 2 is inserted so as to face the stopper 11 side. A simple anchor bolt 10 is constructed.
　前記アンカーボルトを施工するときは、図２（ａ）に示す打ち込み治具を使用する。打ち込み治具４は、先端の打ち込み部４１が、以下に説明する固定孔３に嵌り込む外径であり、軸方向に前記ボルト１が嵌り込む径と深さのボルト孔４２が先端から後端側に向けて設けられている。更に、後端は打ち込みヘッド４３となっている。 When constructing the anchor bolts, use the driving jig shown in Fig. 2(a). The driving jig 4 has a driving portion 41 at the tip of which has an outer diameter that fits into the fixing hole 3 described below, and a bolt hole 42 that has a diameter and depth that allows the bolt 1 to fit in the axial direction, extending from the tip to the rear end. placed towards the side. Furthermore, the rear end serves as a driving head 43 .
　図３は前記アンカーボルトを施工する手順を示す図である。 FIG. 3 is a diagram showing the procedure for installing the anchor bolts.
　先ず、図３（ａ）に示すように、コンクリート構造物の施工箇所に固定孔３が開けられる。 First, as shown in FIG. 3(a), a fixing hole 3 is drilled in the construction site of the concrete structure.
　当該固定孔３の径は前記ボルト１に挿入された前記係止環２の、施工前の開脚片２２が入る径であり、後に説明するように、施工によって開脚片２２を広げたときの径よりは小さい径となる。 The diameter of the fixing hole 3 is such that the leg opening piece 22 of the locking ring 2 inserted into the bolt 1 can be accommodated before construction. is smaller than the diameter of
　前記固定孔３に前記アンカーボルト１０が前記当たり止め１１側を先端側（固定孔３の奥側）にして底に行き当たるように差し込まれる（図３（ｂ））。 The anchor bolt 10 is inserted into the fixing hole 3 so that the stopper 11 side is the leading end (back side of the fixing hole 3) and hits the bottom (Fig. 3(b)).
　上記の状態で、前記打ち込み治具４のボルト孔４２に、前記差し込んだアンカーボルト１０を構成するするボルト１に差し込んで、治具４の先端の打ち込み部４１を固定孔３に差し込むと、打ち込み部４１の先端が前記係止環２の開脚片２２の内側に当接する状態となる（図３（ｃ））。この状態で、ハンマードリル等で治具４の後端の打ち込みヘッド４３を強く叩くと、前記開脚片２２が開くことになる。 In the above state, when the bolt 1 constituting the inserted anchor bolt 10 is inserted into the bolt hole 42 of the driving jig 4, and the driving portion 41 at the tip of the jig 4 is inserted into the fixing hole 3, driving is performed. The tip of the portion 41 comes into contact with the inner side of the open leg piece 22 of the locking ring 2 (FIG. 3(c)). In this state, when the driving head 43 at the rear end of the jig 4 is strongly hit with a hammer drill or the like, the leg pieces 22 are opened.
　図３（ｄ）に示すように、開いた開脚片２２は尖った先端部が固定孔３の周壁を破って食い込んでブリッジを形成し、強固に固定されることになる。
尚、前記打ち込み治具４の先端面は、緩やかに外径が大きく曲がって広がる形状をなして、開脚片２２の初期の広がり形状に近い形状にしておくと、前記のように打ち込んだときに、開脚片２２が開きやすくなる。 As shown in FIG. 3(d), the open leg piece 22 has a sharp tip that breaks into the peripheral wall of the fixing hole 3 and bites into it to form a bridge, which is firmly fixed.
It should be noted that if the front end surface of the driving jig 4 is formed into a shape that is gradually widened with a large outer diameter, and the shape is similar to the initial widened shape of the leg pieces 22, when the driving jig 4 is driven as described above, In addition, the open leg piece 22 can be easily opened.
　この後、打ち込み治具４を抜くと、アンカーボルト１０が固定孔３に固定されたことになる（図３（ｅ））。 After that, when the driving jig 4 is pulled out, the anchor bolt 10 is fixed in the fixing hole 3 (Fig. 3(e)).
　ここで、図４（ａ）に示すように、固定孔３とボルト１との空隙に接着剤Ｒを充填して、より高い強度を有する金属アンカー得ることができる。また、このとき、図４（ｂ）に示すように、金属のブッシュＢを挿通した上で接着剤Ｒを充填してもよい。前記金属のブッシュＢには雌ネジを刻んでボルト１に螺着するのが好ましい。 Here, as shown in FIG. 4(a), the gap between the fixing hole 3 and the bolt 1 is filled with an adhesive R to obtain a metal anchor having higher strength. At this time, as shown in FIG. 4(b), the adhesive R may be filled after the metal bush B is inserted. Preferably, the metal bush B is threaded into the bolt 1 with an internal thread.
　図５は、本願発明のアンカーボルト１０を固定孔３に打ち込んだときの状態を、固定孔３を軸方向に切断して示した写真である。上記したように、開脚片２２の先端が固定孔３より開いて、孔壁に食い込んでいるのが確認できる。 FIG. 5 is a photograph showing a state in which the anchor bolt 10 of the present invention is driven into the fixing hole 3 by cutting the fixing hole 3 in the axial direction. As described above, it can be confirmed that the tip of the open leg piece 22 is opened from the fixing hole 3 and bites into the hole wall.
　図６の写真は、図５と同じく固定孔３を軸方向に切断した状態からアンカーボルト１０を取り去った状態を示すものである。固定孔３の孔壁に開脚片２２の先端が食い込んだ後の穴３１ができていているのを確認することができる。 The photograph in FIG. 6 shows a state in which the anchor bolt 10 is removed from the state in which the fixing hole 3 is cut in the axial direction as in FIG. It can be confirmed that a hole 31 is formed after the tip of the leg piece 22 bites into the hole wall of the fixing hole 3 .
　図７は複数の係止環２を用いた場合を例示するものである。 FIG. 7 illustrates a case where a plurality of locking rings 2 are used.
　前記のように、ボルト１に挿入した先端側の係止環２を打ち込み治具４で打ち込んで固定孔３に固定し、次いでブッシュ状のスペーサー２３を介して、後端側の係止環２を差し込み、前記同様、打ち込み治具４でその開脚片２２を広げるようにしている。 As described above, the locking ring 2 on the front end side inserted into the bolt 1 is driven by the driving jig 4 to be fixed in the fixing hole 3, and then the locking ring 2 on the rear end side is inserted through the bush-like spacer 23. is inserted, and the split leg piece 22 is widened by the driving jig 4 in the same manner as described above.
　これによって、係止環２が一つの場合より固定強度が高くなることは確実である。もちろん要求される強度に応じて更に数を増やすことも可能である。 With this, it is certain that the fixing strength will be higher than in the case where there is only one locking ring 2. Of course, it is also possible to further increase the number according to the strength required.
　上記では打ち込み治具４で開脚片２２を広げるようにしているが、図８に示すように先端側の係止環２の後端側にスペーサー２３を挿入して固定孔３に差し込み、当該スペーサー２３の後端側から打ち込み治具４を差し込んで打ち込むことで、で開脚片２２を広げることでもよい。２つの係止環２を用いるときには引き続いて後端側の係止環２を挿入することができることになる。 In the above description, the split leg piece 22 is widened by the driving jig 4, but as shown in FIG. The split leg piece 22 may be widened by inserting the driving jig 4 from the rear end side of the spacer 23 and driving the spacer 23 . When two locking rings 2 are used, the locking ring 2 on the rear end side can be subsequently inserted.
　前記打ち込み治具４に代えて、図２（ｂ）に示す捻じ込み治具５を使用することもできる。すなわち、先端の嵌め込み穴５２に捻じ込みナット５１を嵌め込むことができる構造である。 Instead of the driving jig 4, a screwing jig 5 shown in FIG. 2(b) can be used. That is, it is a structure in which the screwed nut 51 can be fitted into the fitting hole 52 at the tip.
　ボルト１に係止環２を挿入したアンカーボルト１０を固定孔３に差し込んだ状態で、先端の嵌め込み穴５２に捻じ込みナット５１を嵌め込んだ状態の捻じ込み治具５を、アンカーボルト１０のボルト１に捻じ込んでいく。捻じ込みナット５１の先端が係止環２の開脚片２２に行き当たったところで更に捻じ込んで、開脚片２２を広げるようになっている。 With the anchor bolt 10 having the locking ring 2 inserted into the bolt 1 inserted into the fixing hole 3 , the screwing jig 5 with the nut 51 screwed into the fitting hole 52 at the tip is attached to the anchor bolt 10 . Tighten into bolt 1. When the tip of the screw-in nut 51 hits the leg piece 22 of the lock ring 2, it is further screwed in to widen the leg piece 22.例文帳に追加
　この場合も、捻じ込みナット５１の先端側を、開脚片２２の開き具合に合わせる形状となるように、外径が大きく曲がって広がる形状としておくのが好ましい。 Also in this case, it is preferable that the tip side of the screw-in nut 51 has a shape in which the outer diameter is greatly curved and widened so that the shape matches the opening condition of the leg pieces 22 .
　以上説明したように、本発明はアンカーボルトを構成する係止環の開脚片の先端が固定孔の周壁に食い込むので、強い荷重が掛かったとき、更にコンクリートに食い込み、変位することなくその荷重を受け止めることができ、また抜けることもない。 As described above, according to the present invention, since the tip of the open leg piece of the locking ring constituting the anchor bolt bites into the peripheral wall of the fixing hole, when a strong load is applied, the tip further bites into the concrete and is not displaced by the load. You can accept it, and you can't get out of it.
　１　ボルト
　２　係止環
　３　固定孔
　４　打ち込み治具
　５　捻じ込み治具
　１１　当たり止め
　２１　係止環
　２２　係止片
　２３　スペーサー
　４１　打ち込み部
　４２　ボルト孔
　４３　打ち込みヘッド
　５１　ナット
　５２　嵌め込み穴
　６０　ボルト（６１　先端側、６２　後端側）
　６５　拡張リング
　６６　ナット
６７　雌テーパ
６８　雄テーパ
　Ｂ　ブッシュ
　Ｒ　接着剤
  1 bolt 2 locking ring 3 fixing hole 4 driving jig 5 screwing jig 11 stop 21 locking ring 22 locking piece 23 spacer 41 driving part 42 bolt hole 43 driving head 51 nut 52 fitting hole 60 bolt (61 tip side, 62 rear end side)
65 Expansion ring 66 Nut 67 Female taper 68 Male taper B Bush R Adhesive

Claims (6)

  1. 　先端に鍔状の当たり止めを設けたボルトと、
    　環状の基端から外側に反り返って開いた複数の開脚片を備え、前記基端側が前記ボルトの当たり止めに当接するようにボルトに挿入した係止環と
    を備えたことを特徴とするアンカーボルト。     A bolt with a brim-shaped stop at the tip,
    An anchor comprising a plurality of open leg pieces bent outward from a base end of an annular shape, and a locking ring inserted into a bolt so that the base end side abuts against a stop of the bolt. bolt.
  2. 　前記開脚片の先端が幅、厚みとも尖鋭化された請求項１に記載のアンカーボルト。 The anchor bolt according to claim 1, wherein the tip of said open leg piece is sharpened in both width and thickness.
  3. 　前記係止環が挿入されたボルトに対して、更にスペーサーと前記係止環と同じ構造の別の係止環の組が少なくとも１組挿入された請求項１又は２に記載のアンカーボルト。 The anchor bolt according to claim 1 or 2, wherein at least one set of a spacer and another locking ring having the same structure as the locking ring is inserted into the bolt into which the locking ring is inserted.
  4. 　固定孔を開けるステップ
    　請求項１又は２に記載のアンカーボルトを、前記当たり止めを先端にして前記固定孔に挿入するステップ。
    　前記開脚片が治具を用いて更に開かれ、当該開脚片の先端を前記固定孔の壁に食い込ませるステップ。
    　を備えたことを特徴とするアンカーボルトの施工方法。     A step of opening a fixing hole; A step of inserting the anchor bolt according to claim 1 or 2 into the fixing hole with the stopper as a tip.
    A step of further opening the leg-spreading piece using a jig to bite the tip of the leg-spreading piece into the wall of the fixing hole.
    A method of installing an anchor bolt, comprising:
  5. 　更にスペーサーを介して別の前記係止環と同じ構造の係止環を挿入し、治具を用いてその開脚片を開いて、前記固定孔の影に食い込ませるステップ
    を備えた請求項４に記載のアンカーボルトの施工方法。     (4) further comprising a step of inserting another locking ring having the same structure as said locking ring through a spacer, opening the leg pieces by using a jig, and making it bite into the shadow of said fixing hole. Construction method of the anchor bolt described in .
  6. 　更に、前記固定孔とアンカーボルトとの空隙に接着剤を充填するステップを備えた請求項４又は５に記載のアンカーボルトの施工方法。
          6. The anchor bolt installation method according to claim 4 or 5, further comprising a step of filling a gap between the fixing hole and the anchor bolt with an adhesive.
PCT/JP2022/003022 2021-01-28 2022-01-27 Anchor bolt and method for installing same WO2022163742A1 (en)

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JP2021-011831 2021-01-28
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS3619509B1 (en) * 1959-06-25 1961-10-17
JPH05332330A (en) * 1992-05-27 1993-12-14 Omi Kogyo Co Ltd Anchor
JP3005716U (en) * 1994-06-27 1995-01-10 有▲しん▼ 程 Anchor bolt for wall
JPH0941498A (en) * 1995-07-26 1997-02-10 Terada Hide Building joint element
JP2016199967A (en) * 2015-04-14 2016-12-01 Ｆｓテクニカル株式会社 Post-construction anchor, construction method for post-construction anchor, and post-construction anchor system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS3619509B1 (en) * 1959-06-25 1961-10-17
JPH05332330A (en) * 1992-05-27 1993-12-14 Omi Kogyo Co Ltd Anchor
JP3005716U (en) * 1994-06-27 1995-01-10 有▲しん▼ 程 Anchor bolt for wall
JPH0941498A (en) * 1995-07-26 1997-02-10 Terada Hide Building joint element
JP2016199967A (en) * 2015-04-14 2016-12-01 Ｆｓテクニカル株式会社 Post-construction anchor, construction method for post-construction anchor, and post-construction anchor system

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