WO2017145283A1 - Post-construction anchor, construction method for post-construction anchor method, and anchoring system - Google Patents

Post-construction anchor, construction method for post-construction anchor method, and anchoring system Download PDF

Info

Publication number
WO2017145283A1
WO2017145283A1 PCT/JP2016/055396 JP2016055396W WO2017145283A1 WO 2017145283 A1 WO2017145283 A1 WO 2017145283A1 JP 2016055396 W JP2016055396 W JP 2016055396W WO 2017145283 A1 WO2017145283 A1 WO 2017145283A1
Authority
WO
WIPO (PCT)
Prior art keywords
anchor
post
diameter
construction
hole
Prior art date
Application number
PCT/JP2016/055396
Other languages
French (fr)
Japanese (ja)
Inventor
藤田　正吾
Original Assignee
Ｆｓテクニカル株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ｆｓテクニカル株式会社 filed Critical Ｆｓテクニカル株式会社
Priority to JP2018501466A priority Critical patent/JPWO2017145283A1/en
Priority to PCT/JP2016/055396 priority patent/WO2017145283A1/en
Publication of WO2017145283A1 publication Critical patent/WO2017145283A1/en

Links

Images

Classifications

    • 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
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry

Definitions

  • Another post-installed anchor is a sleeve driving type post-installed anchor fixed to an anchor hole in which a diameter-expanded portion is formed at a predetermined depth position of the pilot hole, and has an expanded portion on the tip side. It has a sleeve part, an anchor body inserted through the sleeve part and having a male screw formed at least on the tip side, and a ride-up part for expanding the spreading part, and screwed to the tip side of the anchor body so that the position can be adjusted.
  • the sleeve portion can be driven so as to reach the bottom portion of the enlarged diameter portion. Thereafter, if the cone portion is attracted to the sleeve portion by tightening the anchor body or pulling the anchor body, the expanded portion is further expanded and is pressed against the inner peripheral surface of the expanded diameter portion. That is, the expanded portion can be fully expanded in a state where the sleeve portion is in contact with the bottom portion of the expanded diameter portion.
  • the outer diameter of the sleeve portion and the diameter of the thickest portion of the climbing portion are formed to be the same diameter.
  • the cone portion in which the internal thread is formed on the inner peripheral surface can be formed easily and inexpensively.
  • the anchor body is preferably composed of all screw bolts.
  • the annular thin portion is easily deformed as compared with other portions, so that the expanded portion can be expanded with a relatively small driving force.
  • the post-construction anchor construction method of the present invention is the above-described post-construction anchor construction method, in which a drilling step for drilling a pilot hole, a diameter expansion step for forming a diameter-expanded portion in the pilot hole, and a cone portion at the bottom are provided.
  • the post-construction anchor can be fixed not only mechanically to the anchor hole but also by an adhesive.
  • the expanded portion can be reliably expanded in the expanded diameter portion and in accordance with the shape of the expanded diameter portion, and thus an anchoring system that reliably exhibits the design wedge effect is constructed. be able to.
  • FIG. 1 shows an anchor hole formed in a concrete fixing body.
  • the anchor hole 1 includes a straight-shaped pilot hole 3 drilled in a fixing body 2 (for example, a concrete frame or a concrete foundation), and a pilot hole 3 in a deep part (tip portion) of the pilot hole 3. And an enlarged diameter portion 4 that is wider than the diameter.
  • the pilot hole 3 has a long opening side hole 3b on the opening 3a side and a short bottom side hole 3d on the hole bottom 3c side with the enlarged diameter portion 4 interposed therebetween.
  • the enlarged diameter portion 4 has a tapered shape that expands toward the hole bottom 3c and projects outward from the lower hole 3 in the radial direction. That is, the enlarged diameter portion 4 has a truncated cone shape, and the bottom portion 4a which is an end portion on the hole bottom 3c side is an annular stepped portion between the bottom side hole portion 3d.
  • the pilot hole 3 is drilled by a drilling device 51 such as a vibration drill, a hammer drill, or a core drill described later (the illustrated one is drilled with a vibration drill). Therefore, the hole bottom 3c of the prepared hole 3 is formed in a conical shape.
  • the enlarged diameter portion 4 is formed by an enlarged diameter device 53 having an enlarged diameter drill bit 72 described later.
  • FIG. 2 is a structural diagram of the post-installed anchor according to the embodiment
  • FIG. 3 is a cross-sectional structural diagram of the anchored state in which the anchor is driven.
  • the post-installed anchor 10 is an anchor main body having a cylindrical sleeve portion 11 having a widened portion 22 on the distal end side, and a male screw 12a that is inserted through the sleeve portion 11 and has an entire peripheral surface. 12, and a cone portion 13 having a tapered portion 13 a (lifting portion) for expanding the expanding portion 22 from the inside and screwed to the distal end side of the anchor main body 12 so as to be adjustable in position.
  • the sleeve part 11, the anchor main body 12, and the cone part 13 are all formed of steel, stainless steel or the like.
  • the post-construction anchor 10 is a sleeve driving type anchor.
  • the post-construction anchor 10 is abutted against the hole bottom 3c of the anchor hole 1 (the lower hole 3), and the sleeve portion 11 is driven into the sleeve portion 11.
  • the expanded portion 22 is expanded so as to be pushed open by the tapered portion 13 a of the cone portion 13. Thereby, the expansion part 22 spreads in the diameter expansion part 4, and the post-construction anchor 10 is fixed to the fixing body 2 (see FIG. 3).
  • the sleeve portion 11 includes a sleeve main body 21 and a widened portion 22 on the distal end side continuous with the sleeve main body 21.
  • the sleeve main body 21 and the expanded portion 22 are integrally formed, but they may be separate.
  • the expanded portion 22 has annular thin portions 24 formed at the base portion and the intermediate portion thereof. Each annular thin portion 24 is configured by forming an annular groove having a semicircular cross section on the outer peripheral surface of the expanded portion 22. In addition, you may make it comprise the annular thin part 24 by forming an annular groove in the internal peripheral surface of the expansion part 22.
  • the anchor body 12 is composed of so-called all screw bolts. That is, the anchor main body 12 has a form in which the male screw 12a is formed over the entire peripheral surface of the round bar. The base end side of the anchor main body 12 protrudes greatly from the anchor hole 1 in a state where the post-installed anchor 10 is driven into the anchor hole 1, and the support object is nut-fastened to this portion (see FIG. 3).
  • the anchor main body 12 of all screws is preferably formed by cutting (including chamfering) long full screw bolts into necessary dimensions.
  • the anchor main body 12 may be formed by forming the male screw 12a only on the necessary portions (base side and tip side) of the round bar. Moreover, it is preferable to form a left-handed screw or the like on the proximal end side of the anchor main body 12 so as to have a loosening prevention structure.
  • the nominal diameter of the anchor body 12 (the diameter of the thread) is the nominal diameter of the post-constructed anchor 10.
  • the anchor main body 12 is composed of all screw bolts, and is hooked to the enlarged diameter portion 4 of the anchor hole 1 via the cone portion 13 and the expanded portion 22 in a state where the sleeve portion 11 is driven. Therefore, in the post-installed anchor 10 of the present embodiment, the anchor body 12 has the pulling strength as the tensile strength of the anchor body 12 by being fixed in the anchor hole 1 (the enlarged diameter portion 4) having an appropriate depth.
  • the cone portion 13 has a tapered portion 13a that pushes the expanding portion 22 on the outer side (outer peripheral surface) thereof, and has a female screw 13b that is screwed into the male screw 12a of the anchor body 12 on the inner side (inner peripheral surface). ing. That is, the cone part 13 and the anchor main body 12 of this embodiment constitute a screw mechanism, and the cone part 13 is configured to be adjustable in the axial direction with respect to the anchor main body 12.
  • the expanded portion 22 is obtained. Will expand appropriately within the enlarged diameter portion 4.
  • it is difficult to accurately form the anchor hole 1 in the post-construction anchor 10 and there is a problem that it is difficult to appropriately expand the expanded portion 22 within the expanded diameter portion 4.
  • the position of the enlarged diameter portion 4 is formed with reference to the opening 3 a of the pilot hole 3, the positional accuracy of the enlarged diameter portion 4 becomes unstable due to unevenness of the surface of the fixing body 2.
  • the position of the enlarged diameter portion 4 is formed with reference to the hole bottom 3c of the prepared hole 3, the position accuracy of the enlarged diameter portion 4 becomes unstable due to the tip shape of the prepared hole drill bit 61. Further, the diameter-enlarged portion 4 itself also lacks shape stability due to the lapse of time of the diameter-enlarging drill bit 72.
  • the expanded portion 22 is surely expanded in the expanded diameter portion 4 even if the formation accuracy of the anchor hole 1 is low due to the form of the cone portion 13 and the construction method. I am doing so.
  • the cone portion 13 is formed in a length corresponding to the length of the enlarged diameter portion 4 in the axial direction, and from the distance from the bottom 3c of the prepared hole 3 to the bottom portion 4a of the enlarged diameter portion 4. Is also formed long.
  • the cone portion 13 is in a position-adjusted state where the cone portion 13 abuts against the hole bottom 3c of the pilot hole 3, and the tapered portion 13a faces the enlarged diameter portion 4 with a gap larger than the thickness of the expanded portion 22.
  • the expanding portion 22 is configured to expand so that the outer diameter of the expanding portion 22 becomes larger than the diameter of the pilot hole 3 as the sleeve portion 11 is driven.
  • the expansion of the expanded part 22 by the cone part 13 is about the bottom part 4a of the expanded part 4 from about 1/2 to the thickness at the tip of the expanded part 22. It is preferable to have a size that fits in, and it is also preferable that the enlarged diameter portion 4 has an enlarged size that follows this size. Thereby, the post-construction anchor 10 can reliably exhibit the wedge effect.
  • This construction method includes a drilling step (see FIG. 4A) for drilling the pilot hole 3 using the punching device 51, a shaping process (see FIG. 4B) for shaping the pilot hole 3 drilled using the shaping device 52, and an expansion.
  • a diameter expansion step (see FIG. 4C) for forming the enlarged diameter portion 4 in the pilot hole 3 using the diameter device 53 and an injection step for injecting the adhesive A into the anchor hole 1 using the injection device 54 (see FIG. 4D).
  • an adjustment step see FIG.
  • an insertion process for inserting and mounting
  • a hypothetical wearing process in which the sleeve portion 11 is driven to expand the expanded portion 22, and the anchor body 12 is tightened or the anchor body 12 is attracted.
  • the sleeve portion 11 is Attracting emission unit 13 includes the fixing step to further expanding the expanding portion 22 (see FIG. 4H), the.
  • the injection process can be omitted. Further, when the pilot hole 3 is drilled with a core drill, an appropriate pilot hole 3 is formed, so that the shaping step can be omitted.
  • the drilling device 51 is constituted by a vibration drill or a hammer drill equipped with a pilot hole drill bit 61 (concrete drill bit). That is, in this punching device 51, the pilot hole 3 is punched by rotation and striking in the axial direction.
  • the prepared hole 3 drilled by the prepared hole drill bit 61 has a hole bottom 3c having a conical shape (see FIG. 4A).
  • the shaping device 52 is configured by mounting a shaping drill bit 62 on an electric drill (not shown). As shown in FIG. 5, the shaping drill bit 62 is configured, for example, by attaching a shaping bit 65 that shapes the inner peripheral surface of the pilot hole 3 by grinding to the tip of a shank 64.
  • the shaping bit 65 is configured by embedding a plurality (four in the drawing) of cemented carbide chips 67 in the outer peripheral portion of a cylindrical bit body 66.
  • the diameter of the rotation trajectory of the plurality of carbide tips 67 (the nominal diameter of the shaping drill bit 62) is formed to be the same as the nominal diameter of the pilot hole drill bit 61.
  • the shaping drill bit 62 is inserted into the prepared hole 3 while rotating, and the opening 3a side of the prepared hole 3 is shaped.
  • the diameter expansion device 53 is configured by mounting a diameter expansion drill bit 72 on an electric drill (not shown).
  • the diameter-expanding drill bit 72 includes, for example, a pair of cutting blade portions 73 and a cutting blade holding portion 74 that holds the pair of cutting blade portions 73 movably (slidable) in the radial direction, And a shank portion 75 that supports the cutting edge holding portion 74.
  • Each cutting edge part 73 is comprised by the cutting blade piece 73a divided into 3 by the axial direction. That is, the pair of cutting blade portions 73 includes an upper pair of cutting blade pieces 73a, a middle pair of cutting blade pieces 73a, and a lower pair of cutting blade pieces 73a.
  • each cutting edge piece 73 a is formed at the same taper angle as the taper surface of the above-mentioned enlarged diameter portion 4. That is, the diameter-expanding drill bit 72 has a cutting edge portion 73 whose contour shape becomes a tapered shape when rotated, and the length and taper angle of the contour shape become the length and taper angle of the diameter-expanded portion 4. . Further, the taper angle of the contour shape in the cutting edge portion 73 and the taper angle of the taper portion 13a in the cone portion 13 are formed to be the same.
  • the pair of cutting edge portions 73 are expanded (moved) radially outward by a centrifugal force accompanying rotation, and the expanded-diameter portion 4 is ground in the prepared hole 3 (FIG. 4C). reference). Therefore, the enlarged diameter portion 4 is ground into a tapered shape (conical truncated cone shape).
  • the cutting edge piece 73a is preferably a diamond cutting edge or a cemented carbide cutting edge.
  • the injection device 54 includes a pump part (not shown) and a nozzle part 81, and the adhesive A stored in the pump part is discharged from the tip of the nozzle part 81 and injected into the anchor hole 1 by pumping of the pump part. (See FIG. 4E).
  • the drill bit 61 for the drill hole for the vibration drill is rotated to drill the pilot hole 3 having a diameter corresponding to the nominal diameter of the post-installed anchor 10.
  • a drill bit 61 for a prepared hole is used in which the diameter (diameter) of the prepared hole 3 is about 1.0 mm larger than the outer diameter (anchor outer diameter) of the post-installed anchor 10.
  • the depth of the pilot hole 3 is set so that the tensile strength of the post-installed anchor 10 and the cone breakage of the fixing body 2 are balanced.
  • the shaping drill bit 62 is rotated by an electric drill while being inserted into the prepared hole 3, and is reciprocated several times around the opening 3a side of the prepared hole 3.
  • a pilot hole 3 that is about 1.0 mm thicker than the outer diameter of the post-construction anchor 10 and has high linearity and roundness is formed.
  • the diameter-expanding drill bit 72 and the post-construction anchor 10 can be smoothly inserted into the prepared hole 3.
  • the diameter expansion drill bit 72 is inserted into the pilot hole 3 so as to abut against the hole bottom 3c, and the diameter expansion drill bit 72 is rotated by an electric drill (about 10 seconds). Then, the enlarged diameter portion 4 is ground. Thereby, the enlarged diameter part 4 is formed in the predetermined position from the hole bottom 3c.
  • the diameter expansion work and the suction work (cleaning) for sucking the concrete grinding powder be performed simultaneously in parallel.
  • the nozzle portion 81 is inserted into the anchor hole 1 so as to abut against the hole bottom 3c, and the adhesive A is injected from the innermost portion of the anchor hole 1.
  • the adhesive A for example, an epoxy resin adhesive A is used.
  • the injection amount of the adhesive A is an amount obtained by subtracting the volume of the post-construction anchor 10 from the volume of the anchor hole 1 (including the enlarged diameter portion 4). Thereby, it is possible to prevent the adhesive A from protruding from the anchor hole 1 when the post-construction anchor 10 is inserted into the anchor hole 1.
  • the position of the cone 13 is adjusted (screwing adjustment) with respect to the anchor main body 12 so that the cone 13 abuts against the hole bottom 3c of the anchor hole 1.
  • the cone portion 13 screwed into the anchor main body 12 is rotated, and the position of the cone portion 13 is adjusted so that the tip of the cone portion 13 and the tip of the anchor main body 12 are in the same position.
  • strictness is not required for the adjustment of the cone portion 13, and the tip of the cone portion 13 and the tip of the anchor main body 12 may be substantially at the same position.
  • the tip of the anchor body 12 is in a state of being abutted against the hole bottom 3c of the anchor hole 1.
  • the adjustment process should just be performed by implementation of an insertion process.
  • the post-installed anchor 10 (cone portion 13) is inserted into the anchor hole 1 so as to abut against the hole bottom 3c.
  • the cone part 13 is shifted to the back side of the lower hole 3 with respect to the enlarged diameter part 4, and is wide between the cone part 13 and the enlarged diameter part 4.
  • Space arises.
  • the cone portion 13 is displaced by about 30% of the entire length with respect to the enlarged diameter portion 4.
  • the base end side of the anchor main body 12 and the base end side of the sleeve portion 11 are in a state of largely protruding from the opening 3 a of the anchor hole 1.
  • the driving rod 83 is placed so as to contact the sleeve portion 11, and the sleeve portion 11 is driven through the driving rod 83 with a hammer 84 or the like.
  • the expansion part 22 advances as it is, it rides on the base end side of the cone part 13 (taper part 13a).
  • the expanded portion 22 that has ridden on the proximal end side of the cone portion 13 is appropriately expanded, but the advance is prioritized, and the expanded tip eventually becomes the bottom portion 4a (annular step portion) of the expanded diameter portion 4. bump into.
  • the expansion part 22 will be in the state expanded about 70%, and will collide with the bottom site
  • the completion of driving is perceived by a striking sound or the like.
  • the cone portion 13 is displaced with respect to the enlarged diameter portion 4, the expansion (expansion) of the expanded portion 22 is suppressed, and the expanded portion 22 and the enlarged diameter portion 4 are not connected. There are minute gaps.
  • the expanded portion 22 is pressed against the enlarged diameter portion 4 by this driving (fixing).
  • a dedicated wrench 86 is applied to the proximal end side of the anchor main body 12 exposed to the outside of the anchor hole 1, and the anchor main body 12 is tightened.
  • the anchor main body 12 is tightened, the cone portion 13 screwed with the anchor main body 12 is attracted to the opening 3 a side, the expanded portion 22 is further expanded, and is pressed against the expanded diameter portion 4. That is, the expanded portion 22 expands in the expanded diameter portion 4 in accordance with the shape of the expanded diameter portion 4.
  • the post-construction anchor 10 is fixed to the fixing body 2 (anchor hole 1).
  • the base end side of the anchor main body 12 may be tightened with a nut, and the cone portion 13 together with the anchor main body 12 may be attracted to the opening 3a side. Further, the anchor body 12 may be tightened using a cap nut or a double nut instead of the dedicated wrench 86.
  • the post-construction anchor 10 of this embodiment if the position of the cone portion 13 is adjusted so as to abut against the hole bottom 3 c of the pilot hole 3, the post-construction anchor 10 is provided. Even if the formation accuracy or the like of the anchor hole 1 is low, the sleeve portion 11 can be driven so as to reach the bottom portion 4 a of the enlarged diameter portion 4. Thereafter, if the cone portion 13 is attracted to the sleeve portion 11 via the anchor main body 12, the expanded portion 22 can be further expanded and pressed against the inner peripheral surface of the expanded diameter portion 4.
  • the expansion of the enlarged diameter portion 4 is insufficient.
  • the sleeve portion 11 expansion portion 22
  • the expanded portion 22 is completely expanded so as to be pressed against the expanded diameter portion 4. It can be opened (fixed). Thereby, the expansion part 22 can be reliably expanded within the enlarged diameter part 4 according to the shape of the enlarged diameter part 4.
  • the sleeve portion 11, the anchor body 12 and the cone portion 13 constituting the post-installed anchor 10 have a simple basic shape and can be easily manufactured. Therefore, the post-construction anchor 10 as a whole can be manufactured at a low cost.
  • the cone portion 13 has a tapered shape (tapered portion 13a).
  • the cone portion 13 may have a bullet shape, a drum shape, a spherical shape or the like having a female screw 13b at the axial center portion.

Abstract

[Problem] To provide a post-construction anchor for which an expanding portion can be reliably expanded in an expanded diameter portion and so as to match the shape of the expanded diameter portion. [Solution] A sleeve impact type post-construction anchor 10 that is anchored in an anchor hole 1 in which an expanded diameter portion 4 is formed at a position at a prescribed depth in a pilot hole 3 comprises: a sleeve unit 11 having an expanding portion 22 on the distal end; an anchor body 12 that is inserted into the sleeve unit 11 and that has male threads 12a formed on at least the distal end; and a cone portion 13 that has a tapered portion 13a to expand the expanding portion 22 and that screws onto the distal end of the anchor body 12 so that the position thereof is adjustable. The cone portion 13 is formed in the axial direction to a length corresponding to the length of the expanded diameter portion 4 and to be longer than the distance from the bottom 3c of the pilot hole 3 to the bottom part 4a of the expanded diameter portion 4.

Description

後施工アンカー、後施工アンカーの施工方法およびアンカーリングシステムPost-construction anchor, post-construction anchor construction method and anchoring system
　本発明は、コンクリート等の躯体（定着体）に穿孔したアンカー穴に定着される後施工アンカー、後施工アンカーの施工方法およびアンカーリングシステムに関するものである。 The present invention relates to a post-construction anchor to be anchored in an anchor hole drilled in a concrete body (fixing body), a post-construction anchor construction method, and an anchoring system.
　従来、この種の後施工アンカーとして、ねじふし鉄筋をアンカー本体とするものが知られている（特許文献１参照）。
　この後施工アンカーは、ねじふし鉄筋で構成されたアンカー本体と、アンカー本体が挿通するスリーブおよび拡張部材と、アンカー本体の先端部に螺合すると共に拡張部材を拡張させるテーパー部を有するナットと、ナットに接するように位置してアンカー本体の先端部に螺合した止めナットと、を備えている。ナットは、ダブルナットの形式でアンカー本体に螺合した止めナットにより、アンカー本体に固定されている。止めナットは、アンカー孔の孔底に突き当てられ、この状態でナットのテーパー部がアンカー孔の拡径部に臨むようになっている。
　止めナットが孔底に当接するように後施工アンカーをアンカー孔に挿入し、スリーブを打ち込むと、ナットのテーパー部により拡張部材が拡径部内で広がって、後施工アンカーがアンカー孔に固定される。 Conventionally, as a post-installed anchor of this type, one having a threaded reinforcing bar as an anchor body is known (see Patent Document 1).
This post-installed anchor includes an anchor main body constituted by threaded reinforcing bars, a sleeve and an expansion member through which the anchor main body is inserted, a nut having a taper portion that is screwed to the distal end portion of the anchor main body and expands the expansion member, A locking nut positioned in contact with the nut and screwed into the tip of the anchor body. The nut is fixed to the anchor body by a locking nut screwed to the anchor body in the form of a double nut. The retaining nut is abutted against the bottom of the anchor hole, and in this state, the tapered portion of the nut faces the enlarged diameter portion of the anchor hole.
When the post-installed anchor is inserted into the anchor hole so that the locking nut comes into contact with the bottom of the hole and the sleeve is driven, the expansion member is expanded in the enlarged diameter portion by the taper portion of the nut, and the post-constructed anchor is fixed to the anchor hole. .
特開２００１－３０３６７７号公報Japanese Patent Laid-Open No. 2001-303677
　このような、従来の後施工アンカーでは、例えばアンダーカッター（拡径用ドリルビット）の切刃が摩耗して、所定の広がりを持つ拡径部が形成されていないと、ナットと拡径部との間隙が狭くなり、打ち込まれた拡張部材が拡径部の奥まで達しない状態が発生する。同様に、止めナットの長さに対し、アンカー孔の孔底から拡径部の底までの距離が短いと、ナットと拡径部との間隙が狭くなり、打ち込まれた拡張部材が拡径部の奥まで達しない状態が発生する。
　このような場合には、後施工アンカーの拡張部材が拡張不足となり、所定の引抜き強度が得られなくなる問題がある。したがって、拡径部が所定の形状に形成されているか否か、アンカー孔の孔底から拡径部の底までの距離が適切か否か、さらにアンダーカッターの切刃の摩耗状態等を、常に管理しておく必要があり、施工性が劣るものとなっていた。 In such a conventional post-installed anchor, for example, if the cutting edge of an undercutter (expansion drill bit) is worn and a diameter-expanded part having a predetermined width is not formed, The gap becomes narrow, and a state where the driven expansion member does not reach the back of the expanded diameter portion occurs. Similarly, if the distance from the bottom of the anchor hole to the bottom of the enlarged diameter portion is shorter than the length of the locking nut, the gap between the nut and the enlarged diameter portion becomes narrower, and the driven expansion member becomes the enlarged diameter portion. The state that does not reach the back of the occurs.
In such a case, there is a problem that the extension member of the post-construction anchor becomes insufficiently expanded and a predetermined pulling strength cannot be obtained. Therefore, whether or not the enlarged diameter part is formed in a predetermined shape, whether the distance from the bottom of the anchor hole to the bottom of the enlarged diameter part is appropriate, and the wear state of the cutting blade of the under cutter, etc. It was necessary to manage, and workability was inferior.
　本発明は、拡開部を、拡径部内で且つ拡径部の形状に合わせて確実に拡開させることができる後施工アンカー、後施工アンカーの施工方法およびアンカーリングシステムを提供することを課題としている。 It is an object of the present invention to provide a post-construction anchor, a post-construction anchor construction method, and an anchoring system capable of reliably expanding the widened portion within the widened portion and according to the shape of the widened portion. It is said.
　本発明の後施工アンカーは、下穴の所定の深さ位置に拡径部を形成したアンカー穴に定着されるスリーブ打込み式の後施工アンカーであって、先端側に拡開部を有するスリーブ部と、スリーブ部に挿通され、少なくとも先端側に雄ネジを形成したアンカー本体と、拡開部を拡開させる乗上げ部を有すると共に、アンカー本体の先端側に位置調整自在に螺合したコーン部と、を備え、コーン部は、軸方向において、拡径部の長さに対応する長さに形成され且つ下穴の穴底から拡径部の底部位までの距離よりも長く形成されていることを特徴とする。 The post-installed anchor of the present invention is a sleeve driving type post-installed anchor fixed to an anchor hole in which a diameter-expanded portion is formed at a predetermined depth position of the pilot hole, and has a sleeve portion having an expanded portion on the distal end side And an anchor body that is inserted into the sleeve portion and has an external thread formed at least on the tip side, and a climbing portion that widens the expanding portion, and a cone portion that is screwed to the tip side of the anchor body so that the position is adjustable. The cone portion is formed in a length corresponding to the length of the enlarged diameter portion in the axial direction and longer than the distance from the bottom of the prepared hole to the bottom portion of the enlarged diameter portion. It is characterized by that.
　この構成によれば、乗上げ部の先端が、拡径部の底部位と下穴の穴底との間に位置するように、コーン部をアンカー本体に対し位置調整しておけば、拡径部の形成精度や拡径部の穴底からの位置精度があまくても、スリーブ部を拡径部の底部位に達するように打ち込むことができる。その後、アンカー本体の締付け或いはアンカー本体の引付けにより、スリーブ部に対しコーン部を引き付ければ、拡開部が更に拡開して拡径部の内周面に圧接される。すなわち、スリーブ部を拡径部の底部位に当接させた状態で、拡開部を完全に拡開させることができる。したがって、拡開部を、拡径部内で且つ拡径部の形状に合わせて確実に拡開させることができ、後施工アンカーの施工不良を有効に防止することができる。なお、後施工アンカーは、拡開部が拡径部内で拡開することにより、設計上のクサビ効果を確実に発揮することになる。 According to this configuration, if the position of the cone portion is adjusted with respect to the anchor body so that the tip of the riding portion is located between the bottom portion of the enlarged diameter portion and the bottom of the pilot hole, Even if the formation accuracy of the portion and the positional accuracy of the enlarged diameter portion from the hole bottom are increased, the sleeve portion can be driven so as to reach the bottom portion of the enlarged diameter portion. Thereafter, if the cone portion is attracted to the sleeve portion by tightening the anchor body or pulling the anchor body, the expanded portion is further expanded and is pressed against the inner peripheral surface of the expanded diameter portion. That is, the expanded portion can be fully expanded in a state where the sleeve portion is in contact with the bottom portion of the expanded diameter portion. Therefore, the expanded portion can be reliably expanded within the expanded diameter portion and in accordance with the shape of the expanded diameter portion, and construction failure of the post-construction anchor can be effectively prevented. In addition, the post-construction anchor reliably exhibits the design wedge effect when the expanded portion expands within the expanded diameter portion.
　本発明の他の後施工アンカーは、下穴の所定の深さ位置に拡径部を形成したアンカー穴に定着されるスリーブ打込み式の後施工アンカーであって、先端側に拡開部を有するスリーブ部と、スリーブ部に挿通され、少なくとも先端側に雄ネジを形成したアンカー本体と、拡開部を拡開させる乗上げ部を有すると共に、アンカー本体の先端側に位置調整自在に螺合したコーン部と、を備え、コーン部が下穴の穴底に突き当たる位置調整状態で、乗上げ部は、拡開部の肉厚よりも大きい間隙を存して拡径部と対峙すると共に、スリーブ部の打込みに伴って拡開部の外径が下穴の径より大きくなるように拡開部を拡開させることを特徴とする。 Another post-installed anchor according to the present invention is a sleeve driving type post-installed anchor fixed to an anchor hole in which a diameter-expanded portion is formed at a predetermined depth position of the pilot hole, and has an expanded portion on the tip side. It has a sleeve part, an anchor body inserted through the sleeve part and having a male screw formed at least on the tip side, and a ride-up part for expanding the spreading part, and screwed to the tip side of the anchor body so that the position can be adjusted. A climbing portion facing the enlarged diameter portion with a gap larger than the wall thickness of the expanded portion, and a sleeve The expanded portion is expanded so that the outer diameter of the expanded portion becomes larger than the diameter of the pilot hole as the portion is driven.
　この構成によれば、アンカー本体に対しコーン部を、下穴の穴底に突き当たるように位置調整しておけば、拡径部の形成精度や拡径部の穴底からの位置精度があまくても、スリーブ部を拡径部の底部位に達するように打ち込むことができる。その後、アンカー本体の締付け或いはアンカー本体の引付けにより、スリーブ部に対しコーン部を引き付ければ、拡開部が更に拡開して拡径部の内周面に圧接される。すなわち、スリーブ部を拡径部の底部位に当接させた状態で、拡開部を完全に拡開させることができる。したがって、拡開部を、拡径部内で且つ拡径部の形状に合わせて確実に拡開させることができ、後施工アンカーの施工不良を有効に防止することができる。なお、後施工アンカーは、拡開部が拡径部内で拡開することにより、設計上のクサビ効果を確実に発揮することになる。 According to this configuration, if the position of the cone portion is adjusted so that it abuts against the bottom of the pilot hole with respect to the anchor body, the formation accuracy of the enlarged diameter portion and the positional accuracy of the enlarged diameter portion from the bottom of the hole are increased. Alternatively, the sleeve portion can be driven so as to reach the bottom portion of the enlarged diameter portion. Thereafter, if the cone portion is attracted to the sleeve portion by tightening the anchor body or pulling the anchor body, the expanded portion is further expanded and is pressed against the inner peripheral surface of the expanded diameter portion. That is, the expanded portion can be fully expanded in a state where the sleeve portion is in contact with the bottom portion of the expanded diameter portion. Therefore, the expanded portion can be reliably expanded within the expanded diameter portion and in accordance with the shape of the expanded diameter portion, and construction failure of the post-construction anchor can be effectively prevented. In addition, the post-construction anchor reliably exhibits the design wedge effect when the expanded portion expands within the expanded diameter portion.
　これらの場合、スリーブ部の外径と乗上げ部の最も太い部分の径とが、同径に形成されていることが好ましい。 In these cases, it is preferable that the outer diameter of the sleeve portion and the diameter of the thickest portion of the climbing portion are formed to be the same diameter.
　この構成によれば、拡開部を拡開させる機能を損なうことなく、後施工アンカーのアンカー穴への挿入を円滑に行うことができる。 According to this configuration, the post-installed anchor can be smoothly inserted into the anchor hole without impairing the function of expanding the expanded portion.
　また、コーン部は、先端に向かって太くなるテーパー部を有し、乗上げ部が、テーパー部であることが好ましい。 Further, it is preferable that the cone portion has a tapered portion that becomes thicker toward the tip, and the riding-up portion is a tapered portion.
　この構成によれば、内周面に雌ネジを形成したコーン部を、簡単且つ安価に形成することができる。 According to this configuration, the cone portion in which the internal thread is formed on the inner peripheral surface can be formed easily and inexpensively.
　また、アンカー本体は、全ネジボルトで構成されていることが好ましい。 Also, the anchor body is preferably composed of all screw bolts.
　この構成によれば、長尺の全ネジボルトを切断することで、所定の寸法を有するアンカー本体を、簡単且つ安価に形成することができる。 According to this configuration, it is possible to easily and inexpensively form an anchor main body having a predetermined dimension by cutting a long full screw bolt.
　一方、拡開部は、周方向の環状溝により形成された１以上の環状薄肉部を有していることが好ましい。 On the other hand, it is preferable that the expanding portion has one or more thin annular portions formed by circumferential annular grooves.
　この構成によれば、環状薄肉部は、他の部分に比して変形しやすいため、拡開部を比較的小さな打込み力で拡開させることができる。 According to this configuration, the annular thin portion is easily deformed as compared with other portions, so that the expanded portion can be expanded with a relatively small driving force.
　本発明の後施工アンカーの施工方法は、上記した後施工アンカーの施工方法であって、下穴を穿孔する穿孔工程と、下穴に拡径部を形成する拡径工程と、コーン部が下穴の穴底に突き当たるように、アンカー本体に対しコーン部を位置調整する調整工程と、調整した後施工アンカーを、アンカー穴に挿入する挿入工程と、スリーブ部を打ち込んで拡開部を拡開させる仮定着工程と、アンカー本体の締付けまたはアンカー本体の引付けにより、スリーブ部に対しコーン部を引き付けて、拡開部を更に拡開させる本定着工程と、を備えたことを特徴とする。 The post-construction anchor construction method of the present invention is the above-described post-construction anchor construction method, in which a drilling step for drilling a pilot hole, a diameter expansion step for forming a diameter-expanded portion in the pilot hole, and a cone portion at the bottom are provided. An adjustment process to adjust the position of the cone relative to the anchor body so that it hits the bottom of the hole, an insertion process to insert the adjusted post-installed anchor into the anchor hole, and a sleeve part to drive in to expand the expansion part And a main fixing step of further expanding the expanded portion by attracting the cone portion to the sleeve portion by tightening the anchor body or pulling the anchor body.
　この構成によれば、コーン部が下穴の穴底に突き当たるように位置調整しておいて（調整工程）、スリーブ部を打ち込むようにしている（仮定着工程）ため、拡径部の形成精度や拡径部の穴底からの位置精度があまくても、スリーブ部を拡径部の底部位に達するように打ち込むことができる。その後、アンカー本体の締付け或いはアンカー本体の引付けにより、スリーブ部に対しコーン部を引き付ければ、拡開部が更に拡開して拡径部の内周面に圧接される（本定着工程）。これにより、スリーブ部を拡径部の底部位に当接させた状態で、拡開部を完全に拡開させることができる。したがって、拡開部を、拡径部内で且つ拡径部の形状に合わせて確実に拡開させることができ、後施工アンカーの施工不良を有効に防止することができる。なお、後施工アンカーは、拡開部が拡径部内で拡開することにより、設計上のクサビ効果を確実に発揮することになる。 According to this configuration, since the position of the cone portion is adjusted so as to abut against the bottom of the pilot hole (adjustment step), and the sleeve portion is driven (assumed wearing step), the formation accuracy of the enlarged diameter portion is increased. Even if the positional accuracy of the enlarged diameter portion from the bottom of the hole increases, the sleeve portion can be driven so as to reach the bottom portion of the enlarged diameter portion. After that, if the cone portion is attracted to the sleeve portion by tightening the anchor body or pulling the anchor body, the expanded portion is further expanded and pressed against the inner peripheral surface of the expanded diameter portion (main fixing step). . As a result, the expanded portion can be fully expanded while the sleeve portion is in contact with the bottom portion of the expanded diameter portion. Therefore, the expanded portion can be reliably expanded within the expanded diameter portion and in accordance with the shape of the expanded diameter portion, and construction failure of the post-construction anchor can be effectively prevented. In addition, the post-construction anchor reliably exhibits the design wedge effect when the expanded portion expands within the expanded diameter portion.
　この場合、穿孔工程と拡径工程との間において、下穴を穿孔する下穴用ドリルビットと同径の整形用ドリルビットを用い、下穴の開口部側を研削により整形する整形工程を、更に備えることが好ましい。 In this case, between the drilling step and the diameter expansion step, using a shaping drill bit having the same diameter as the pilot hole drill bit for drilling the pilot hole, a shaping step of shaping the opening side of the pilot hole by grinding, It is preferable to further provide.
　この構成によれば、下穴の開口部側内周面を研削することにより、直線性および真円度の高い下穴を整形することができる。これにより、後施工アンカーや拡径部を形成する拡径用ドリルビットが円滑に挿入可能な下穴を形成することができる。 According to this configuration, it is possible to shape a pilot hole having high linearity and roundness by grinding the inner peripheral surface of the pilot hole on the opening side. Thereby, the pilot hole which can insert the post-construction anchor and the drill bit for diameter expansion which forms an enlarged diameter part smoothly can be formed.
　また、拡径工程と挿入工程との間において、アンカー穴に接着剤を注入する注入工程を、更に備えることが好ましい。 In addition, it is preferable to further include an injection step of injecting an adhesive into the anchor hole between the diameter expansion step and the insertion step.
　この構成によれば、後施工アンカーを、アンカー穴に対しメカニカルに定着させ得るだけでなく、接着剤によっても定着させることができる。 According to this configuration, the post-construction anchor can be fixed not only mechanically to the anchor hole but also by an adhesive.
　本発明のアンカーリングシステムは、上記した後施工アンカーと、下穴に拡径部を形成する拡径用ドリルビットと、を備え、拡径用ドリルビットは、回転したときの輪郭形状がテーパー形状となる切刃部を有し、テーパー部のテーパー角と輪郭形状のテーパー角とが同一であることを特徴する。 The anchor ring system of the present invention includes the above-described post-installed anchor and a diameter-expanding drill bit that forms a diameter-enlarged portion in the pilot hole, and the diameter-expanding drill bit has a tapered shape when rotated. The taper angle of the taper portion and the taper angle of the contour shape are the same.
　この構成によれば、拡開部を、拡径部内で且つ拡径部の形状に合わせて確実に拡開させることができため、設計上のクサビ効果を確実に発揮するアンカーリングシステムを構築することができる。 According to this configuration, the expanded portion can be reliably expanded in the expanded diameter portion and in accordance with the shape of the expanded diameter portion, and thus an anchoring system that reliably exhibits the design wedge effect is constructed. be able to.
後施工アンカーが打ち込まれるアンカー穴の断面図である。It is sectional drawing of the anchor hole into which a post-construction anchor is driven. 実施形態に係る後施工アンカーの構造図である。It is a structural diagram of the post-construction anchor according to the embodiment. 実施形態に係る後施工アンカーの打込んだ定着状態の断面図である。It is sectional drawing of the fixation state in which the post-construction anchor which concerns on embodiment was driven. 実施形態に係る後施工アンカーの施工手順のうちの、穿孔工程を表した断面図である。It is sectional drawing showing the drilling process among the construction procedures of the post-construction anchor which concerns on embodiment. 実施形態に係る後施工アンカーの施工手順のうちの、整形工程を表した断面図である。It is sectional drawing showing the shaping process among the construction procedures of the post-construction anchor which concerns on embodiment. 実施形態に係る後施工アンカーの施工手順のうちの、拡径工程を表した断面図である。It is sectional drawing showing the diameter-expansion process among the construction procedures of the post-construction anchor which concerns on embodiment. 実施形態に係る後施工アンカーの施工手順のうちの、注入工程を表した断面図である。It is sectional drawing showing the injection | pouring process among the construction procedures of the post-construction anchor which concerns on embodiment. 実施形態に係る後施工アンカーの施工手順のうちの、調整工程を表した断面図である。It is sectional drawing showing the adjustment process among the construction procedures of the post-construction anchor which concerns on embodiment. 実施形態に係る後施工アンカーの施工手順のうちの、挿入工程を表した断面図である。It is sectional drawing showing the insertion process among the construction procedures of the post-construction anchor which concerns on embodiment. 実施形態に係る後施工アンカーの施工手順のうちの、仮定着工程を表した断面図である。It is sectional drawing showing the assumption attachment process among the construction procedures of the post-construction anchor which concerns on embodiment. 実施形態に係る後施工アンカーの施工手順のうちの、本定着工程を表した断面図である。It is sectional drawing showing this fixing process among the construction procedures of the post-construction anchor which concerns on embodiment. 整形装置における整形用ドリルビットの構造図である。It is a structural diagram of the drill bit for shaping in the shaping apparatus. 拡径装置における拡径用ドリルビットの構造図である。It is a structural diagram of a drill bit for diameter expansion in a diameter expansion device.
　以下、添付の図面を参照して、本発明の一実施形態に係る後施工アンカー、後施工アンカーの施工方法およびアンカーリングシステムについて説明する。この後施工アンカーは、コンクリートの躯体や基礎等の定着体に対し、構造体を支持するために設けられる、いわゆるスリーブ打込み式の金属拡張アンカーである。特に、本実施形態の後施工アンカーは、拡径部（拡底部）を有するアンカー穴と協働して定着体に強固に固定し得るものである。また、アンカーリングシステムは、相互に密接な関係を有する後施工アンカーと、拡径部を形成する拡径用ドリルビットにより構成されている。ここでは、後施工アンカーや拡径用ドリルビットを説明する前に、拡径部を有するアンカー穴について、簡単に説明する。 Hereinafter, a post-construction anchor, a post-construction anchor construction method, and an anchoring system according to an embodiment of the present invention will be described with reference to the accompanying drawings. This post-installed anchor is a so-called sleeve-driven type metal expansion anchor provided to support a structural body with respect to a fixing body such as a concrete frame or foundation. In particular, the post-installed anchor of this embodiment can be firmly fixed to the fixing body in cooperation with an anchor hole having an enlarged diameter portion (an enlarged bottom portion). The anchoring system is composed of post-installed anchors having a close relationship with each other and a diameter-expanding drill bit that forms a diameter-expanded portion. Here, before explaining the post-construction anchor and the diameter-expanding drill bit, the anchor hole having the diameter-expanded portion will be briefly described.
　［アンカー穴］
　図１は、コンクリート製の定着体に形成されたアンカー穴を表している。同図に示すように、アンカー穴１は、定着体２（例えばコンクリート躯体やコンクリート基礎）に穿孔されたストレート形状の下穴３と、下穴３の奥部（先端部）に、下穴３よりも太径に広がった拡径部４と、を備えている。下穴３は、拡径部４を挟んで開口部３ａ側の長い開口側穴部３ｂと、穴底３ｃ側の短い底側穴部３ｄと、を有している。また、拡径部４は、穴底３ｃに向かって広がったテーパー形状を為し、下穴３から径方向外方に張り出している。すなわち、拡径部４は、円錐台形状を為しており、穴底３ｃ側の端部である底部位４ａが、底側穴部３ｄと間で環状の段部となっている。 [Anchor hole]
FIG. 1 shows an anchor hole formed in a concrete fixing body. As shown in the figure, the anchor hole 1 includes a straight-shaped pilot hole 3 drilled in a fixing body 2 (for example, a concrete frame or a concrete foundation), and a pilot hole 3 in a deep part (tip portion) of the pilot hole 3. And an enlarged diameter portion 4 that is wider than the diameter. The pilot hole 3 has a long opening side hole 3b on the opening 3a side and a short bottom side hole 3d on the hole bottom 3c side with the enlarged diameter portion 4 interposed therebetween. Further, the enlarged diameter portion 4 has a tapered shape that expands toward the hole bottom 3c and projects outward from the lower hole 3 in the radial direction. That is, the enlarged diameter portion 4 has a truncated cone shape, and the bottom portion 4a which is an end portion on the hole bottom 3c side is an annular stepped portion between the bottom side hole portion 3d.
　この場合、下穴３は、後述する振動ドリル、ハンマードリル、コアドリル等の穿孔装置５１により穿孔される（図示のものは、振動ドリルで穿孔）。したがって、下穴３の穴底３ｃは、円錐形状に窪入形成されている。また、拡径部４は、後述する拡径用ドリルビット７２を有する拡径装置５３により形成される。なお、振動ドリルやハンマードリルで穿孔（回転と打撃で穿孔）を行うと、下穴３の開口部３ａ側において直線性や形状性（楕円状となる）が損なわれるため、後述する整形用ドリルビット６２を有する整形装置５２により、拡径部４を形成する前に下穴３の整形を行うことが好ましい。 In this case, the pilot hole 3 is drilled by a drilling device 51 such as a vibration drill, a hammer drill, or a core drill described later (the illustrated one is drilled with a vibration drill). Therefore, the hole bottom 3c of the prepared hole 3 is formed in a conical shape. The enlarged diameter portion 4 is formed by an enlarged diameter device 53 having an enlarged diameter drill bit 72 described later. When drilling with a vibration drill or hammer drill (drilling by rotation and hammering), linearity and shape (being elliptical) are impaired on the opening 3a side of the pilot hole 3, so that the shaping drill described later It is preferable to shape the prepared hole 3 before forming the enlarged diameter portion 4 by the shaping device 52 having the bit 62.
　［後施工アンカー］
　図２は実施形態に係る後施工アンカーの構造図であり、図３はその打込んだ定着状態の断面構造図である。これらの図に示すように、後施工アンカー１０は、先端側に拡開部２２を有する円筒状のスリーブ部１１と、スリーブ部１１に挿通され、周面全域に雄ネジ１２ａを形成したアンカー本体１２と、拡開部２２を内側から拡開させるテーパー部１３ａ（乗上げ部）を有すると共に、アンカー本体１２の先端側に位置調整自在に螺合したコーン部１３と、を備えている。そして、スリーブ部１１、アンカー本体１２およびコーン部１３は、いずれもスチールやステンレス等で形成されている。 [Post-installed anchor]
FIG. 2 is a structural diagram of the post-installed anchor according to the embodiment, and FIG. 3 is a cross-sectional structural diagram of the anchored state in which the anchor is driven. As shown in these drawings, the post-installed anchor 10 is an anchor main body having a cylindrical sleeve portion 11 having a widened portion 22 on the distal end side, and a male screw 12a that is inserted through the sleeve portion 11 and has an entire peripheral surface. 12, and a cone portion 13 having a tapered portion 13 a (lifting portion) for expanding the expanding portion 22 from the inside and screwed to the distal end side of the anchor main body 12 so as to be adjustable in position. And the sleeve part 11, the anchor main body 12, and the cone part 13 are all formed of steel, stainless steel or the like.
　この後施工アンカー１０は、スリーブ打込み式のアンカーであり、後施工アンカー１０をアンカー穴１（下穴３）の穴底３ｃに突き当てておいて、スリーブ部１１を打ち込むことにより、スリーブ部１１の拡開部２２が、コーン部１３のテーパー部１３ａにより押し開かれるように拡開する。これにより、拡開部２２が、拡径部４内で広がって後施工アンカー１０が定着体２に定着される（図３参照）。 The post-construction anchor 10 is a sleeve driving type anchor. The post-construction anchor 10 is abutted against the hole bottom 3c of the anchor hole 1 (the lower hole 3), and the sleeve portion 11 is driven into the sleeve portion 11. The expanded portion 22 is expanded so as to be pushed open by the tapered portion 13 a of the cone portion 13. Thereby, the expansion part 22 spreads in the diameter expansion part 4, and the post-construction anchor 10 is fixed to the fixing body 2 (see FIG. 3).
　スリーブ部１１は、スリーブ本体２１と、スリーブ本体２１に連なる先端側の拡開部２２とを有している。本実施形態では、スリーブ本体２１と拡開部２２とは一体に形成されているが、これらは別体であってもよい。拡開部２２には、その基部および中間部にそれぞれ環状薄肉部２４が形成されている。各環状薄肉部２４は、拡開部２２の外周面に断面半円状の環状溝を形成することにより、構成されている。なお、拡開部２２の内周面に環状溝を形成することで、環状薄肉部２４を構成するようにしてもよい。 The sleeve portion 11 includes a sleeve main body 21 and a widened portion 22 on the distal end side continuous with the sleeve main body 21. In the present embodiment, the sleeve main body 21 and the expanded portion 22 are integrally formed, but they may be separate. The expanded portion 22 has annular thin portions 24 formed at the base portion and the intermediate portion thereof. Each annular thin portion 24 is configured by forming an annular groove having a semicircular cross section on the outer peripheral surface of the expanded portion 22. In addition, you may make it comprise the annular thin part 24 by forming an annular groove in the internal peripheral surface of the expansion part 22. FIG.
　また、拡開部２２には、複数のスリット２５が形成されている。複数のスリット２５は、周方向に均等に配置されており、それぞれ拡開部２２の先端から基部側の環状薄肉部２４の位置まで延びている。このように形成された拡開部２２は、スリット２５により分割された複数の拡開片が、コーン部１３に乗上げ屈曲するように放射状に拡開する。また、拡開部２２の先端内周面は、コーン部１３への乗上げが円滑に行われるように面取り形状のガイド部２６が形成されている。なお、スリット２５の数は、４つ以上とすることが好ましい。 In addition, a plurality of slits 25 are formed in the expanded portion 22. The plurality of slits 25 are evenly arranged in the circumferential direction, and extend from the tip of the expanded portion 22 to the position of the annular thin portion 24 on the base side. The widened portion 22 thus formed widens radially such that a plurality of widened pieces divided by the slit 25 ride on the cone portion 13 and bend. Further, a chamfered guide portion 26 is formed on the inner peripheral surface of the distal end of the expanding portion 22 so that the cone portion 13 can be smoothly climbed. The number of slits 25 is preferably four or more.
　コーン部１３に対しスリーブ部１１を打ち込むと、拡開部２２がそのガイド部２６に案内されてテーパー部１３ａに乗り上げる。拡開部２２は、変形し易い２箇所の環状薄肉部２４を中心にテーパー部１３ａの形状に倣って変形する。すなわち、拡開部２２は、テーパー部１３ａのより押し開かれるようにして拡開する。 When the sleeve portion 11 is driven into the cone portion 13, the expanding portion 22 is guided by the guide portion 26 and rides on the tapered portion 13a. The expanded portion 22 is deformed following the shape of the tapered portion 13a around the two thin annular portions 24 that are easily deformed. That is, the expansion part 22 expands so that it may be pushed open more by the taper part 13a.
　アンカー本体１２は、いわゆる全ネジボルトで構成されている。すなわち、アンカー本体１２は、丸棒の周面全域に雄ネジ１２ａを形成した形態を有している。アンカー本体１２の基端側は、後施工アンカー１０をアンカー穴１に打ち込んだ状態でアンカー穴１から大きく突出し、この部分に支持対象物がナット止めされる（図３参照）。全ネジのアンカー本体１２は、コストを考慮すると、長尺の全ネジボルトを適宜必要な寸法に切断（面取りを含む）して形成することが好ましい。なお、アンカー本体１２は、丸棒の必要な部分（基部側および先端部側）にのみ雄ネジ１２ａを形成したものであってもよい。また、アンカー本体１２の基端側には、左ネジ等を形成して緩止めの構造とすることが好ましい。 The anchor body 12 is composed of so-called all screw bolts. That is, the anchor main body 12 has a form in which the male screw 12a is formed over the entire peripheral surface of the round bar. The base end side of the anchor main body 12 protrudes greatly from the anchor hole 1 in a state where the post-installed anchor 10 is driven into the anchor hole 1, and the support object is nut-fastened to this portion (see FIG. 3). In consideration of cost, the anchor main body 12 of all screws is preferably formed by cutting (including chamfering) long full screw bolts into necessary dimensions. In addition, the anchor main body 12 may be formed by forming the male screw 12a only on the necessary portions (base side and tip side) of the round bar. Moreover, it is preferable to form a left-handed screw or the like on the proximal end side of the anchor main body 12 so as to have a loosening prevention structure.
　この後施工アンカー１０では、アンカー本体１２の呼び径（ねじ山の径）が、後施工アンカー１０の呼び径となる。上述のように、アンカー本体１２は全ネジボルトで構成され、スリーブ部１１を打ち込んだ状態で、コーン部１３および拡開部２２を介してアンカー穴１の拡径部４に掛け止めされる。したがって、本実施形態の後施工アンカー１０では、適切な深さのアンカー穴１（拡径部４）に定着されることにより、アンカー本体１２の引張り強度がその引抜き強度となる。 In this post-installed anchor 10, the nominal diameter of the anchor body 12 (the diameter of the thread) is the nominal diameter of the post-constructed anchor 10. As described above, the anchor main body 12 is composed of all screw bolts, and is hooked to the enlarged diameter portion 4 of the anchor hole 1 via the cone portion 13 and the expanded portion 22 in a state where the sleeve portion 11 is driven. Therefore, in the post-installed anchor 10 of the present embodiment, the anchor body 12 has the pulling strength as the tensile strength of the anchor body 12 by being fixed in the anchor hole 1 (the enlarged diameter portion 4) having an appropriate depth.
　コーン部１３は、その外側（外周面）に拡開部２２を押し開くテーパー部１３ａを有すると共に、内側（内周面）にアンカー本体１２の雄ネジ１２ａに螺合する雌ネジ１３ｂを有している。すなわち、本実施形態のコーン部１３とアンカー本体１２とはネジ機構を構成しており、アンカー本体１２に対しコーン部１３は、軸方向に位置調整自在に構成されている。 The cone portion 13 has a tapered portion 13a that pushes the expanding portion 22 on the outer side (outer peripheral surface) thereof, and has a female screw 13b that is screwed into the male screw 12a of the anchor body 12 on the inner side (inner peripheral surface). ing. That is, the cone part 13 and the anchor main body 12 of this embodiment constitute a screw mechanism, and the cone part 13 is configured to be adjustable in the axial direction with respect to the anchor main body 12.
　また、テーパー部１３ａの最も太い部分の径（先端の径）は、スリーブ部１１の外径と同径に形成されている。一般的に、後施工アンカー１０の外径（アンカー外径）に対し、下穴３の穿孔径（下穴用ドリルビット６１の径）を、０．５～１．０ｍｍ程度大きい径とすることが推奨されており、スリーブ部１１の外径およびテーパー部１３ａ（コーン部１３）の先端外径が、後施工アンカー１０において最も太い部分であるアンカー外径となっている。一方、コーン部１３の端部は、上記の拡開部２２のガイド部２６に対応して面取りされている。そして、テーパー部１３ａのテーパー角は、拡径部４のテーパー角と略同一角度に形成されている。 Further, the diameter of the thickest portion (the diameter of the tip) of the tapered portion 13 a is formed to be the same as the outer diameter of the sleeve portion 11. Generally, the drilling diameter of the pilot hole 3 (diameter of the drill bit 61 for the pilot hole) is larger than the outer diameter (anchor outer diameter) of the post-installed anchor 10 by about 0.5 to 1.0 mm. Is recommended, and the outer diameter of the sleeve portion 11 and the tip outer diameter of the taper portion 13a (cone portion 13) are the anchor outer diameter that is the thickest portion in the post-installed anchor 10. On the other hand, the end portion of the cone portion 13 is chamfered corresponding to the guide portion 26 of the expanding portion 22 described above. And the taper angle of the taper part 13a is formed in the substantially same angle as the taper angle of the enlarged diameter part 4. FIG.
　このように構成された本実施形態の後施工アンカー１０では、コーン部１３を拡径部４に対応するように位置調整しておいて、スリーブ部１１を打ち込むようにすれば、拡開部２２が拡径部４内で適切に拡開することになる。しかし、実際の施工では、後施工アンカー１０に対しアンカー穴１を精度良く形成することが難しく、拡開部２２を拡径部４内で適切に拡開させ難い問題がある。例えば、拡径部４の位置を下穴３の開口部３ａを基準に形成する場合には、定着体２の表面の不陸により拡径部４の位置精度が不安定となる。同様に、拡径部４の位置を下穴３の穴底３ｃを基準に形成する場合には、下穴用ドリルビット６１の先端形状により、拡径部４の位置精度が不安定となる。また、拡径部４自身も、拡径用ドリルビット７２の経時的な目減りにより、形状の安定性を欠くことになる。 In the post-construction anchor 10 of the present embodiment configured as described above, if the position of the cone portion 13 is adjusted so as to correspond to the enlarged diameter portion 4 and the sleeve portion 11 is driven, the expanded portion 22 is obtained. Will expand appropriately within the enlarged diameter portion 4. However, in actual construction, it is difficult to accurately form the anchor hole 1 in the post-construction anchor 10, and there is a problem that it is difficult to appropriately expand the expanded portion 22 within the expanded diameter portion 4. For example, when the position of the enlarged diameter portion 4 is formed with reference to the opening 3 a of the pilot hole 3, the positional accuracy of the enlarged diameter portion 4 becomes unstable due to unevenness of the surface of the fixing body 2. Similarly, when the position of the enlarged diameter portion 4 is formed with reference to the hole bottom 3c of the prepared hole 3, the position accuracy of the enlarged diameter portion 4 becomes unstable due to the tip shape of the prepared hole drill bit 61. Further, the diameter-enlarged portion 4 itself also lacks shape stability due to the lapse of time of the diameter-enlarging drill bit 72.
　そこで、本実施形態の後施工アンカー１０では、コーン部１３の形態と施工方法とにより、アンカー穴１の形成精度が甘くても、拡開部２２が拡径部４内で確実に拡開するようにしている。 Therefore, in the post-construction anchor 10 of this embodiment, the expanded portion 22 is surely expanded in the expanded diameter portion 4 even if the formation accuracy of the anchor hole 1 is low due to the form of the cone portion 13 and the construction method. I am doing so.
　具体的には、コーン部１３は、軸方向において、拡径部４の長さに対応する長さに形成され且つ下穴３の穴底３ｃから拡径部４の底部位４ａまでの距離よりも長く形成されている。言い換えれば、コーン部１３は、下穴３の穴底３ｃに突き当たる位置調整状態で、テーパー部１３ａが、拡開部２２の肉厚よりも大きい間隙を存して拡径部４と対峙すると共に、スリーブ部１１の打込みに伴って拡開部２２の外径が下穴３の径より大きくなるように拡開部２２を拡開させるよう、構成されている。 Specifically, the cone portion 13 is formed in a length corresponding to the length of the enlarged diameter portion 4 in the axial direction, and from the distance from the bottom 3c of the prepared hole 3 to the bottom portion 4a of the enlarged diameter portion 4. Is also formed long. In other words, the cone portion 13 is in a position-adjusted state where the cone portion 13 abuts against the hole bottom 3c of the pilot hole 3, and the tapered portion 13a faces the enlarged diameter portion 4 with a gap larger than the thickness of the expanded portion 22. The expanding portion 22 is configured to expand so that the outer diameter of the expanding portion 22 becomes larger than the diameter of the pilot hole 3 as the sleeve portion 11 is driven.
　また、詳細は後述するが、施工方法では、コーン部１３により拡開部２２を拡開する過程で、拡開部２２の先端が拡径部４の底部位４ａに達することを優先し、拡開部２２が拡径部４内で確実に拡開するようにしている。 Although the details will be described later, in the construction method, in the process of expanding the expanded portion 22 by the cone portion 13, priority is given to the tip of the expanded portion 22 reaching the bottom part 4 a of the expanded diameter portion 4. The opening 22 is surely expanded in the enlarged diameter portion 4.
　なお、コーン部１３（テーパー部１３ａ）による拡開部２２の拡開は、拡開部２２の先端において、その肉厚が１／２から肉厚分ほどが、拡径部４の底部位４ａに入り込む寸法とすることが好ましく、拡径部４もこの寸法に倣った拡径寸法とすることが好ましい。これにより、後施工アンカー１０に、クサビ効果を確実に発揮させることができる。 In addition, the expansion of the expanded part 22 by the cone part 13 (tapered part 13a) is about the bottom part 4a of the expanded part 4 from about 1/2 to the thickness at the tip of the expanded part 22. It is preferable to have a size that fits in, and it is also preferable that the enlarged diameter portion 4 has an enlarged size that follows this size. Thereby, the post-construction anchor 10 can reliably exhibit the wedge effect.
　［施工方法］
　ここで、図４Ａ～図４Ｈを参照して、後施工アンカー１０の施工方法（施工手順）について説明する。この施工方法は、穿孔装置５１を用いて下穴３を穿孔する穿孔工程（図４Ａ参照）と、整形装置５２を用いて穿孔した下穴３を整形する整形工程（図４Ｂ参照）と、拡径装置５３を用いて下穴３に拡径部４を形成する拡径工程（図４Ｃ参照）と、注入装置５４を用いてアンカー穴１に接着剤Ａを注入する注入工程（図４Ｄ参照）と、コーン部１３が下穴３の穴底３ｃに突き当たるように、アンカー本体１２に対しコーン部１３を位置調整する調整工程と（図４Ｅ参照）と、調整した後施工アンカー１０を、アンカー穴１に挿入装着する挿入工程（図４Ｆ参照）と、スリーブ部１１を打ち込んで拡開部２２を拡開させる仮定着工程（図４Ｇ参照）と、アンカー本体１２の締付けまたはアンカー本体１２の引付けにより、スリーブ部１１に対しコーン部１３を引き付けて、拡開部２２を更に拡開させる本定着工程（図４Ｈ参照）と、を備えている。 [Construction method]
Here, with reference to FIGS. 4A to 4H, a construction method (construction procedure) of the post-construction anchor 10 will be described. This construction method includes a drilling step (see FIG. 4A) for drilling the pilot hole 3 using the punching device 51, a shaping process (see FIG. 4B) for shaping the pilot hole 3 drilled using the shaping device 52, and an expansion. A diameter expansion step (see FIG. 4C) for forming the enlarged diameter portion 4 in the pilot hole 3 using the diameter device 53 and an injection step for injecting the adhesive A into the anchor hole 1 using the injection device 54 (see FIG. 4D). And an adjustment step (see FIG. 4E) for adjusting the position of the cone portion 13 with respect to the anchor main body 12 so that the cone portion 13 abuts against the hole bottom 3c of the pilot hole 3, and the adjusted post-installed anchor 10 is fixed to the anchor hole. 1, an insertion process (see FIG. 4F) for inserting and mounting, a hypothetical wearing process (see FIG. 4G) in which the sleeve portion 11 is driven to expand the expanded portion 22, and the anchor body 12 is tightened or the anchor body 12 is attracted. The sleeve portion 11 is Attracting emission unit 13 includes the fixing step to further expanding the expanding portion 22 (see FIG. 4H), the.
　なお、注入工程は、省略することも可能である。また、コアドリルで下穴３を穿孔する場合には、適切な下穴３が形成されるため、整形工程を省略することも可能である。 The injection process can be omitted. Further, when the pilot hole 3 is drilled with a core drill, an appropriate pilot hole 3 is formed, so that the shaping step can be omitted.
　［施工に用いる装置類］
　穿孔装置５１は、下穴用ドリルビット６１（コンクリート用ドリルビット）を装着した振動ドリルやハンマードリルで構成されている。すなわち、この穿孔装置５１では、回転と軸方向の打撃により、下穴３を穿孔する。下穴用ドリルビット６１により穿孔した下穴３は、その穴底３ｃが円錐形状となる（図４Ａ参照）。 [Equipment used for construction]
The drilling device 51 is constituted by a vibration drill or a hammer drill equipped with a pilot hole drill bit 61 (concrete drill bit). That is, in this punching device 51, the pilot hole 3 is punched by rotation and striking in the axial direction. The prepared hole 3 drilled by the prepared hole drill bit 61 has a hole bottom 3c having a conical shape (see FIG. 4A).
　整形装置５２は、電動ドリル（図示省略）に整形用ドリルビット６２を装着して構成されている。
　図５に示すように、整形用ドリルビット６２は、例えばシャンク６４の先端部に、下穴３の内周面を研削により整形する整形ビット６５を取り付けて、構成されている。整形ビット６５は、円柱状のビット本体６６の外周部に複数（図示のものは４つ）の超硬チップ６７を埋め込んで構成されている。そして、複数の超硬チップ６７の回転軌跡の直径（整形用ドリルビット６２の呼び径）が、上記の下穴用ドリルビット６１の呼び径と同径に形成されている。この整形装置５２では、整形用ドリルビット６２を回転させながら下穴３に挿入し、下穴３の開口部３ａ側を整形する。 The shaping device 52 is configured by mounting a shaping drill bit 62 on an electric drill (not shown).
As shown in FIG. 5, the shaping drill bit 62 is configured, for example, by attaching a shaping bit 65 that shapes the inner peripheral surface of the pilot hole 3 by grinding to the tip of a shank 64. The shaping bit 65 is configured by embedding a plurality (four in the drawing) of cemented carbide chips 67 in the outer peripheral portion of a cylindrical bit body 66. The diameter of the rotation trajectory of the plurality of carbide tips 67 (the nominal diameter of the shaping drill bit 62) is formed to be the same as the nominal diameter of the pilot hole drill bit 61. In the shaping device 52, the shaping drill bit 62 is inserted into the prepared hole 3 while rotating, and the opening 3a side of the prepared hole 3 is shaped.
　拡径装置５３は、電動ドリル（図示省略）に拡径用ドリルビット７２を装着して構成されている。
　図６に示すように、拡径用ドリルビット７２は、例えば一対の切刃部７３と、一対の切刃部７３を径方向に移動自在（スライド自在）に保持する切刃保持部７４と、切刃保持部７４を支持するシャンク部７５と、を備えている。各切刃部７３は、軸方向に３分割された切刃片７３ａで構成されている。すなわち、一対の切刃部７３は、上段の一対の切刃片７３ａ、中段の一対の切刃片７３ａおよび下段の一対の切刃片７３ａで構成されている。 The diameter expansion device 53 is configured by mounting a diameter expansion drill bit 72 on an electric drill (not shown).
As shown in FIG. 6, the diameter-expanding drill bit 72 includes, for example, a pair of cutting blade portions 73 and a cutting blade holding portion 74 that holds the pair of cutting blade portions 73 movably (slidable) in the radial direction, And a shank portion 75 that supports the cutting edge holding portion 74. Each cutting edge part 73 is comprised by the cutting blade piece 73a divided into 3 by the axial direction. That is, the pair of cutting blade portions 73 includes an upper pair of cutting blade pieces 73a, a middle pair of cutting blade pieces 73a, and a lower pair of cutting blade pieces 73a.
　そして、上段の切刃片７３ａ、中段の切刃片７３ａ、下段の切刃片７３ａの順で、切刃保持部７４に対する径方向のスライド寸法が大きくなっている。また、各切刃片７３ａの切刃面は、上記の拡径部４のテーパー面と同一のテーパー角に形成されている。すなわち、拡径用ドリルビット７２は、回転したときの輪郭形状がテーパー形状となる切刃部７３を有し、輪郭形状の長さおよびテーパー角が拡径部４の長さおよびテーパー角となる。また、切刃部７３における輪郭形状のテーパー角と、コーン部１３におけるテーパー部１３ａのテーパー角とが同一に形成されている。 Then, the radial slide dimension with respect to the cutting blade holding portion 74 increases in the order of the upper cutting edge piece 73a, the middle cutting edge piece 73a, and the lower cutting edge piece 73a. Further, the cutting edge surface of each cutting edge piece 73 a is formed at the same taper angle as the taper surface of the above-mentioned enlarged diameter portion 4. That is, the diameter-expanding drill bit 72 has a cutting edge portion 73 whose contour shape becomes a tapered shape when rotated, and the length and taper angle of the contour shape become the length and taper angle of the diameter-expanded portion 4. . Further, the taper angle of the contour shape in the cutting edge portion 73 and the taper angle of the taper portion 13a in the cone portion 13 are formed to be the same.
　この拡径用ドリルビット７２では、回転に伴う遠心力により、一対の切刃部７３を径方向外方に拡開（移動）して、下穴３に拡径部４を研削する（図４Ｃ参照）。したがって、拡径部４は、テーパー形状（円錐台形状）に研削される。なお、切刃片７３ａは、ダイヤモンドの切刃や超硬合金の切刃であることが好ましい。 In this diameter-expanding drill bit 72, the pair of cutting edge portions 73 are expanded (moved) radially outward by a centrifugal force accompanying rotation, and the expanded-diameter portion 4 is ground in the prepared hole 3 (FIG. 4C). reference). Therefore, the enlarged diameter portion 4 is ground into a tapered shape (conical truncated cone shape). The cutting edge piece 73a is preferably a diamond cutting edge or a cemented carbide cutting edge.
　注入装置５４は、ポンプ部（図示省略）とノズル部８１とから成り、ポンプ部のポンピングにより、ポンプ部に貯留されている接着剤Ａが、ノズル部８１の先端から吐出しアンカー穴１に注入される（図４Ｅ参照）。 The injection device 54 includes a pump part (not shown) and a nozzle part 81, and the adhesive A stored in the pump part is discharged from the tip of the nozzle part 81 and injected into the anchor hole 1 by pumping of the pump part. (See FIG. 4E).
　［施工の詳細］
　図４Ａに示す穿孔工程では、振動ドリルの下穴用ドリルビット６１を回転させ、後施工アンカー１０の呼び径に対応する径の下穴３を穿孔する。この場合、下穴３の径（直径）が、後施工アンカー１０の外径（アンカー外径）より１．０ｍｍ前後の太い呼び径となる下穴用ドリルビット６１を用いるものとする。言うまでもないが、下穴３の深さは、後施工アンカー１０の引張り強度と定着体２のコーン破壊とが釣合う寸法とする。なお、この穿孔作業と、コンクリートの研削粉を吸引する吸引作業（清掃）と、を同時並行で行うことが好ましい。 [Details of construction]
In the drilling step shown in FIG. 4A, the drill bit 61 for the drill hole for the vibration drill is rotated to drill the pilot hole 3 having a diameter corresponding to the nominal diameter of the post-installed anchor 10. In this case, it is assumed that a drill bit 61 for a prepared hole is used in which the diameter (diameter) of the prepared hole 3 is about 1.0 mm larger than the outer diameter (anchor outer diameter) of the post-installed anchor 10. Needless to say, the depth of the pilot hole 3 is set so that the tensile strength of the post-installed anchor 10 and the cone breakage of the fixing body 2 are balanced. In addition, it is preferable to perform this perforation operation | work and the suction operation (cleaning) which attracts | sucks the grinding powder of concrete simultaneously in parallel.
　図４Ｂに示す整形工程では、電動ドリルにより整形用ドリルビット６２を回転させながら下穴３に挿入し、下穴３の開口部３ａ側を中心に数往復させる。これにより、後施工アンカー１０の外径より１．０ｍｍ前後の太く、且つ直線性や真円度の高い下穴３が形成される。この工程を経ることで、下穴３に対し、拡径用ドリルビット７２や後施工アンカー１０を円滑に挿入することが可能となる。なお、この場合も、整形作業と、コンクリートの研削粉を吸引する吸引作業（清掃）と、を同時並行で行うことが好ましい。 4B, in the shaping process shown in FIG. 4B, the shaping drill bit 62 is rotated by an electric drill while being inserted into the prepared hole 3, and is reciprocated several times around the opening 3a side of the prepared hole 3. As a result, a pilot hole 3 that is about 1.0 mm thicker than the outer diameter of the post-construction anchor 10 and has high linearity and roundness is formed. By passing through this process, the diameter-expanding drill bit 72 and the post-construction anchor 10 can be smoothly inserted into the prepared hole 3. In this case as well, it is preferable to simultaneously perform the shaping operation and the suction operation (cleaning) for sucking the concrete grinding powder.
　図４Ｃに示す拡径工程では、拡径用ドリルビット７２を、穴底３ｃに突き当てるように下穴３に挿入し、電動ドリルにより拡径用ドリルビット７２を回転させて（１０秒程度）、拡径部４を研削する。これにより、穴底３ｃから所定の位置に拡径部４が形成される。なお、この場合も、拡径作業と、コンクリートの研削粉を吸引する吸引作業（清掃）と、を同時並行で行うことが好ましい。また、一対の切刃部７３に、シャンク部７５（の軸心部）を介して冷却液を供給するようにしてもよい。この場合には、切刃部７３の冷却とアンカー穴１の洗浄と、を同時に行うこととなる。 In the diameter expansion step shown in FIG. 4C, the diameter expansion drill bit 72 is inserted into the pilot hole 3 so as to abut against the hole bottom 3c, and the diameter expansion drill bit 72 is rotated by an electric drill (about 10 seconds). Then, the enlarged diameter portion 4 is ground. Thereby, the enlarged diameter part 4 is formed in the predetermined position from the hole bottom 3c. In this case as well, it is preferable that the diameter expansion work and the suction work (cleaning) for sucking the concrete grinding powder be performed simultaneously in parallel. Moreover, you may make it supply a cooling fluid to a pair of cutting-blade part 73 via the shank part 75 (axial center part). In this case, cooling of the cutting edge portion 73 and cleaning of the anchor hole 1 are performed simultaneously.
　図４Ｄに示す注入工程では、ノズル部８１を穴底３ｃに突き当てるようにアンカー穴１に挿入し、接着剤Ａをアンカー穴１の最奥部から注入する。この場合、接着剤Ａは、例えばエポキシ樹脂系の接着剤Ａを用いる。また、接着剤Ａの注入量は、アンカー穴１（拡径部４を含む）の体積から後施工アンカー１０の体積を減算した量とする。これにより、アンカー穴１に後施工アンカー１０を挿入したときに、接着剤Ａがアンカー穴１からはみ出すのを防止することができる。 4D, the nozzle portion 81 is inserted into the anchor hole 1 so as to abut against the hole bottom 3c, and the adhesive A is injected from the innermost portion of the anchor hole 1. In this case, as the adhesive A, for example, an epoxy resin adhesive A is used. Moreover, the injection amount of the adhesive A is an amount obtained by subtracting the volume of the post-construction anchor 10 from the volume of the anchor hole 1 (including the enlarged diameter portion 4). Thereby, it is possible to prevent the adhesive A from protruding from the anchor hole 1 when the post-construction anchor 10 is inserted into the anchor hole 1.
　図４Ｅに示す調整工程では、コーン部１３がアンカー穴１の穴底３ｃに突き当てられるように、アンカー本体１２に対しコーン部１３を位置調整（螺合調整）する。具体的には、アンカー本体１２に螺合しているコーン部１３を回転させ、コーン部１３の先端とアンカー本体１２の先端とが同位置となるように、コーン部１３の位置調整を行う。この場合、コーン部１３の調整には厳密さは要求されず、コーン部１３の先端とアンカー本体１２の先端とがほぼ同位置となればよい。ほぼ同位置であるため、実際の施工においては、アンカー本体１２の先端がアンカー穴１の穴底３ｃに突き当てられる状態となることも、許容される。なお、調整工程は、挿入工程の実施までに行われればよい。 4E, in the adjustment step shown in FIG. 4E, the position of the cone 13 is adjusted (screwing adjustment) with respect to the anchor main body 12 so that the cone 13 abuts against the hole bottom 3c of the anchor hole 1. Specifically, the cone portion 13 screwed into the anchor main body 12 is rotated, and the position of the cone portion 13 is adjusted so that the tip of the cone portion 13 and the tip of the anchor main body 12 are in the same position. In this case, strictness is not required for the adjustment of the cone portion 13, and the tip of the cone portion 13 and the tip of the anchor main body 12 may be substantially at the same position. Since the positions are substantially the same, in the actual construction, it is allowed that the tip of the anchor body 12 is in a state of being abutted against the hole bottom 3c of the anchor hole 1. In addition, the adjustment process should just be performed by implementation of an insertion process.
　図４Ｆに示す挿入工程では、後施工アンカー１０（コーン部１３）を、穴底３ｃに突き当てるようにアンカー穴１内に挿入する。コーン部１３が穴底３ｃに突き当てられると、コーン部１３は、拡径部４に対し下穴３の奥側に位置ズレした状態となり、コーン部１３と拡径部４との間に広い空間（拡開部２２の肉厚以上の空間）が生ずる。本実施形態の後施工アンカー１０では、拡径部４に対しコーン部１３は、その全長の３０％程度位置ズレした状態となる。一方、アンカー本体１２の基端側およびスリーブ部１１の基端側は、アンカー穴１の開口部３ａから大きく突出した状態となる。 4F, the post-installed anchor 10 (cone portion 13) is inserted into the anchor hole 1 so as to abut against the hole bottom 3c. When the cone part 13 is abutted against the hole bottom 3 c, the cone part 13 is shifted to the back side of the lower hole 3 with respect to the enlarged diameter part 4, and is wide between the cone part 13 and the enlarged diameter part 4. Space (space more than the thickness of the expansion part 22) arises. In the post-construction anchor 10 according to the present embodiment, the cone portion 13 is displaced by about 30% of the entire length with respect to the enlarged diameter portion 4. On the other hand, the base end side of the anchor main body 12 and the base end side of the sleeve portion 11 are in a state of largely protruding from the opening 3 a of the anchor hole 1.
　図４Ｇに示す仮定着工程では、打込み棒８３を、スリーブ部１１に当接するように宛がい、ハンマー８４等により、打込み棒８３を介してスリーブ部１１を打ち込む。これにより、拡開部２２は、そのまま前進してからコーン部１３（テーパー部１３ａ）の基端側に乗り上げる。コーン部１３の基端側に乗り上げた拡開部２２は、適宜、拡開してゆくが前進が優先し、やがて拡開した先端が拡径部４の底部位４ａ（環状の段部）に突き当たる。 4G, the driving rod 83 is placed so as to contact the sleeve portion 11, and the sleeve portion 11 is driven through the driving rod 83 with a hammer 84 or the like. Thereby, after the expansion part 22 advances as it is, it rides on the base end side of the cone part 13 (taper part 13a). The expanded portion 22 that has ridden on the proximal end side of the cone portion 13 is appropriately expanded, but the advance is prioritized, and the expanded tip eventually becomes the bottom portion 4a (annular step portion) of the expanded diameter portion 4. bump into.
　本実施形態の後施工アンカー１０では、相対的にコーン部１３の全長の７０％程度が拡開部２２に食い込んだ状態となる。したがって、拡開部２２は、７０％程度拡開した状態となり、拡径部４の底部位４ａに優先的に突き当たることになる。拡開部２２が拡径部４の底部位４ａに突き当たると、打撃音等で打込みの完了が知覚される。この状態では、拡径部４に対しコーン部１３が位置ズレしている分、拡開部２２の広がり（拡開）は抑えられていて、拡開部２２と拡径部４との間には微小な隙間が存在している。もっとも、拡径部４が所定の広がりをもって形成されていない場合には、この打込みにより、拡開部２２が拡径部４に圧接されることになる（定着）。 In the post-construction anchor 10 of the present embodiment, about 70% of the total length of the cone portion 13 is relatively invaded into the expanded portion 22. Therefore, the expansion part 22 will be in the state expanded about 70%, and will collide with the bottom site | part 4a of the diameter expansion part 4 preferentially. When the expanded portion 22 hits the bottom portion 4a of the expanded diameter portion 4, the completion of driving is perceived by a striking sound or the like. In this state, since the cone portion 13 is displaced with respect to the enlarged diameter portion 4, the expansion (expansion) of the expanded portion 22 is suppressed, and the expanded portion 22 and the enlarged diameter portion 4 are not connected. There are minute gaps. However, when the enlarged diameter portion 4 is not formed with a predetermined spread, the expanded portion 22 is pressed against the enlarged diameter portion 4 by this driving (fixing).
　図４Ｈに示す本定着工程では、アンカー穴１の外部に露出したアンカー本体１２の基端側に、専用のレンチ８６を宛がって、アンカー本体１２を締め付ける。アンカー本体１２を締め付けると、これに螺合しているコーン部１３が開口部３ａ側に引き付けられ、拡開部２２が更に拡開して、拡径部４に圧接される。すなわち、拡開部２２が、拡径部４内で且つ拡径部４の形状に合わせて拡開する。これにより、後施工アンカー１０が定着体２（アンカー穴１）に定着される。なお、アンカー本体１２の基端側をナット締めして、アンカー本体１２と共にコーン部１３を開口部３ａ側に引き付けるようにしてもよい。また、専用のレンチ８６に代えて、袋ナットやダブルナットを用いてアンカー本体１２を締め付けるようにしてもよい。 In the fixing process shown in FIG. 4H, a dedicated wrench 86 is applied to the proximal end side of the anchor main body 12 exposed to the outside of the anchor hole 1, and the anchor main body 12 is tightened. When the anchor main body 12 is tightened, the cone portion 13 screwed with the anchor main body 12 is attracted to the opening 3 a side, the expanded portion 22 is further expanded, and is pressed against the expanded diameter portion 4. That is, the expanded portion 22 expands in the expanded diameter portion 4 in accordance with the shape of the expanded diameter portion 4. Thereby, the post-construction anchor 10 is fixed to the fixing body 2 (anchor hole 1). Note that the base end side of the anchor main body 12 may be tightened with a nut, and the cone portion 13 together with the anchor main body 12 may be attracted to the opening 3a side. Further, the anchor body 12 may be tightened using a cap nut or a double nut instead of the dedicated wrench 86.
　［作用・効果］
　以上のように、本実施形態の後施工アンカー１０によれば、アンカー本体１２に対しコーン部１３を、下穴３の穴底３ｃに突き当たるように位置調整しておけば、後施工アンカー１０に対するアンカー穴１の形成精度等が低くとも、スリーブ部１１を拡径部４の底部位４ａに達するように打ち込むことができる。その後、アンカー本体１２を介して、スリーブ部１１に対しコーン部１３を引き付ければ、拡開部２２が更に拡開して拡径部４の内周面に圧接することができる。 [Action / Effect]
As described above, according to the post-construction anchor 10 of this embodiment, if the position of the cone portion 13 is adjusted so as to abut against the hole bottom 3 c of the pilot hole 3, the post-construction anchor 10 is provided. Even if the formation accuracy or the like of the anchor hole 1 is low, the sleeve portion 11 can be driven so as to reach the bottom portion 4 a of the enlarged diameter portion 4. Thereafter, if the cone portion 13 is attracted to the sleeve portion 11 via the anchor main body 12, the expanded portion 22 can be further expanded and pressed against the inner peripheral surface of the expanded diameter portion 4.
　すなわち、拡径部４の形成精度や拡径部４の穴底３ｃからの位置精度が低くても、或いは拡径用ドリルビット７２が目減りして拡径部４の広がりが不十分であっても、スリーブ部１１（拡開部２２）を拡径部４の底部位４ａに達するように打ち込むことができ、且つこの状態で拡開部２２を拡径部４に圧接するように完全に拡開させる（定着）ことができる。これにより、拡開部２２を、拡径部４内で且つ拡径部４の形状に合わせて確実に拡開させることができる。 That is, even if the formation accuracy of the enlarged diameter portion 4 and the positional accuracy of the enlarged diameter portion 4 from the hole bottom 3c are low or the diameter of the enlarged diameter drill 4 is reduced, the expansion of the enlarged diameter portion 4 is insufficient. Also, the sleeve portion 11 (expanded portion 22) can be driven so as to reach the bottom portion 4a of the expanded diameter portion 4, and in this state, the expanded portion 22 is completely expanded so as to be pressed against the expanded diameter portion 4. It can be opened (fixed). Thereby, the expansion part 22 can be reliably expanded within the enlarged diameter part 4 according to the shape of the enlarged diameter part 4. FIG.
　しかも、スリーブ部１１の打込みは、拡開部２２の拡径部４への圧接を伴わないため、打込み不良が生じ難いこともあって、後施工アンカー１０の施工不良を有効に防止することができる。したがって、アンカー穴１の形成精度に係わらず適切なアンカー施工が可能となり、後施工アンカー１０に設計上のクサビ効果を確実に発揮させることができる。 Moreover, since the driving of the sleeve portion 11 does not involve the pressure contact of the expanded portion 22 to the enlarged diameter portion 4, it is difficult for the driving failure to occur, and it is possible to effectively prevent the installation failure of the post-installed anchor 10. it can. Therefore, appropriate anchor construction is possible regardless of the formation accuracy of the anchor hole 1, and the post-construction anchor 10 can reliably exhibit the design wedge effect.
　また、後施工アンカー１０を構成するスリーブ部１１、アンカー本体１２およびコーン部１３は、基本形状が単純であり、簡単に製造することができる。したがって、後施工アンカー１０全体として、低コストで製造することができる。 Also, the sleeve portion 11, the anchor body 12 and the cone portion 13 constituting the post-installed anchor 10 have a simple basic shape and can be easily manufactured. Therefore, the post-construction anchor 10 as a whole can be manufactured at a low cost.
　なお、本実施形態ではコーン部１３をテーパー形状（テーパー部１３ａ）としたが、コーン部１３は、軸心部に雌ネジ１３ｂを有する砲弾形状、太鼓形状、球形等であってもよい。 In this embodiment, the cone portion 13 has a tapered shape (tapered portion 13a). However, the cone portion 13 may have a bullet shape, a drum shape, a spherical shape or the like having a female screw 13b at the axial center portion.
　１…アンカー穴、２…定着体、３…下穴、３ａ…開口部、３ｃ…穴底、４…拡径部、４ａ…底部位、１０…後施工アンカー、１１…スリーブ部、１２…アンカー本体、１２ａ…雄ネジ、１３…コーン部、１３ａ…テーパー部、１３ｂ…雌ネジ、２１…スリーブ本体、２２…拡開部、２４…環状薄肉部、５１…穿孔装置、５２…整形装置、５３…拡径装置、５４…注入装置、６１…下穴用ドリルビット、６２…整形用ドリルビット、７２…拡径用ドリルビット、７３…切刃部、Ａ…接着剤 DESCRIPTION OF SYMBOLS 1 ... Anchor hole, 2 ... Fixing body, 3 ... Pilot hole, 3a ... Opening part, 3c ... Hole bottom, 4 ... Diameter expansion part, 4a ... Bottom part, 10 ... Post-installed anchor, 11 ... Sleeve part, 12 ... Anchor Main body, 12a ... male screw, 13 ... cone portion, 13a ... tapered portion, 13b ... female screw, 21 ... sleeve main body, 22 ... expanding portion, 24 ... annular thin portion, 51 ... punching device, 52 ... shaping device, 53 ... Diameter expansion device, 54 ... Injection device, 61 ... Drill hole for pilot hole, 62 ... Drill bit for shaping, 72 ... Drill bit for diameter expansion, 73 ... Cutting blade, A ... Adhesive

Claims (10)

  1. 　下穴の所定の深さ位置に拡径部を形成したアンカー穴に定着されるスリーブ打込み式の後施工アンカーであって、
    　先端側に拡開部を有するスリーブ部と、
    　前記スリーブ部に挿通され、少なくとも先端側に雄ネジを形成したアンカー本体と、
    　前記拡開部を拡開させる乗上げ部を有すると共に、前記アンカー本体の先端側に位置調整自在に螺合したコーン部と、を備え、
    　前記コーン部は、軸方向において、前記拡径部の長さに対応する長さに形成され且つ前記下穴の穴底から前記拡径部の底部位までの距離よりも長く形成されていることを特徴とする後施工アンカー。     A sleeve driving type post-installed anchor fixed to an anchor hole in which an enlarged diameter portion is formed at a predetermined depth position of the pilot hole,
    A sleeve portion having an expanded portion on the distal end side;
    An anchor body that is inserted through the sleeve portion and has a male screw formed at least on the tip side; and
    And having a riding part for expanding the expanding part, and a cone part screwed to the tip side of the anchor main body so as to be adjustable in position,
    The cone portion is formed in a length corresponding to the length of the enlarged diameter portion in the axial direction and longer than a distance from a bottom of the prepared hole to a bottom portion of the enlarged diameter portion. Post-construction anchor characterized by.
  2. 　下穴の所定の深さ位置に拡径部を形成したアンカー穴に定着されるスリーブ打込み式の後施工アンカーであって、
    　先端側に拡開部を有するスリーブ部と、
    　前記スリーブ部に挿通され、少なくとも先端側に雄ネジを形成したアンカー本体と、
    　前記拡開部を拡開させる乗上げ部を有すると共に、前記アンカー本体の先端側に位置調整自在に螺合したコーン部と、を備え、
    　前記コーン部が前記下穴の穴底に突き当たる位置調整状態で、
    　前記乗上げ部は、前記拡開部の肉厚よりも大きい間隙を存して前記拡径部と対峙すると共に、前記スリーブ部の打込みに伴って前記拡開部の外径が前記下穴の径より大きくなるように前記拡開部を拡開させることを特徴とする後施工アンカー。     A sleeve driving type post-installed anchor fixed to an anchor hole in which an enlarged diameter portion is formed at a predetermined depth position of the pilot hole,
    A sleeve portion having an expanded portion on the distal end side;
    An anchor body that is inserted through the sleeve portion and has a male screw formed at least on the tip side; and
    And having a riding part for expanding the expanding part, and a cone part screwed to the tip side of the anchor main body so as to be adjustable in position,
    In the position adjustment state where the cone portion hits the bottom of the pilot hole,
    The ride-up part faces the enlarged-diameter part with a gap larger than the thickness of the enlarged part, and the outer diameter of the enlarged part becomes smaller than that of the pilot hole when the sleeve part is driven. A post-construction anchor characterized by expanding the expansion portion so as to be larger than the diameter.
  3. 　前記スリーブ部の外径と前記乗上げ部の最も太い部分の径とが、同径に形成されてい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 post-installed anchor according to claim 1 or 2, wherein the outer diameter of the sleeve portion and the diameter of the thickest portion of the ride-up portion are formed to have the same diameter.
  4. 　前記コーン部は、先端に向かって太くなるテーパー部を有し、
    　前記乗上げ部が、前記テーパー部であることを特徴とする請求項１ないし３のいずれか一項に記載の後施工アンカー。     The cone portion has a tapered portion that becomes thicker toward the tip,
    The post-construction anchor according to any one of claims 1 to 3, wherein the climbing portion is the tapered portion.
  5. 　前記アンカー本体は、全ネジボルトで構成されていることを特徴とする請求項１ないし４のいずれか一項に記載の後施工アンカー。 The post-construction anchor according to any one of claims 1 to 4, wherein the anchor main body is composed of all screw bolts.
  6. 　前記拡開部は、周方向の環状溝により形成された１以上の環状薄肉部を有していることを特徴とする請求項１ないし５のいずれか一項に記載の後施工アンカー。 The post-construction anchor according to any one of claims 1 to 5, wherein the widened portion has one or more thin annular portions formed by a circumferential annular groove.
  7. 　請求項１ないし６のいずれかに記載の後施工アンカーの施工方法であって、
    　前記下穴を穿孔する穿孔工程と、
    　前記下穴に前記拡径部を形成する拡径工程と、
    　前記コーン部が前記下穴の穴底に突き当たるように、前記アンカー本体に対し前記コーン部を位置調整する調整工程と、
    　調整した前記後施工アンカーを、前記アンカー穴に挿入する挿入工程と、
    　前記スリーブ部を打ち込んで前記拡開部を拡開させる仮定着工程と、
    　前記アンカー本体の締付けまたは前記アンカー本体の引付けにより、前記スリーブ部に対し前記コーン部を引き付けて、前記拡開部を更に拡開させる本定着工程と、を備えたことを特徴とする後施工アンカーの施工方法。     A construction method of a post-construction anchor according to any one of claims 1 to 6,
    A drilling step of drilling the pilot hole;
    A diameter expansion step of forming the diameter expansion portion in the pilot hole;
    An adjustment step of adjusting the position of the cone portion with respect to the anchor body so that the cone portion abuts against the bottom of the pilot hole;
    An insertion step of inserting the adjusted post-construction anchor into the anchor hole;
    An assumed wearing step of driving the sleeve portion and expanding the expanded portion;
    And a main fixing step of further expanding the expanded portion by attracting the cone portion to the sleeve portion by tightening the anchor body or pulling the anchor body. Anchor construction method.
  8. 　前記穿孔工程と前記拡径工程との間において、前記下穴を穿孔する下穴用ドリルビットと同径の整形用ドリルビットを用い、前記下穴の開口部側を研削により整形する整形工程を、更に備えたことを特徴とする請求項７に記載の後施工アンカーの施工方法。 A shaping step of shaping the opening side of the prepared hole by grinding using an adjusting drill bit having the same diameter as the prepared hole drill bit for drilling the prepared hole between the drilling step and the diameter expanding step. The post-construction anchor construction method according to claim 7, further comprising:
  9. 　前記拡径工程と前記挿入工程との間において、前記アンカー穴に接着剤を注入する注入工程を、更に備えたことを特徴とする請求項７または８に記載の後施工アンカーの施工方法。 The post-construction anchor construction method according to claim 7 or 8, further comprising an injection step of injecting an adhesive into the anchor hole between the diameter expansion step and the insertion step.
  10. 　請求項４に記載の後施工アンカーと、
    　前記下穴に前記拡径部を形成する拡径用ドリルビットと、を備え、
    　前記拡径用ドリルビットは、回転したときの輪郭形状がテーパー形状となる切刃部を有し、
    　前記テーパー部のテーパー角と前記輪郭形状のテーパー角とが同一であることを特徴するアンカーリングシステム。     Post-construction anchor according to claim 4,
    A drill bit for expanding the diameter to form the expanded portion in the prepared hole,
    The diameter-expanding drill bit has a cutting edge portion whose contour shape when rotated is a tapered shape,
    An anchoring system, wherein a taper angle of the taper portion and a taper angle of the contour shape are the same.
PCT/JP2016/055396 2016-02-24 2016-02-24 Post-construction anchor, construction method for post-construction anchor method, and anchoring system WO2017145283A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2018501466A JPWO2017145283A1 (en) 2016-02-24 2016-02-24 Post-construction anchor, post-construction anchor construction method and anchoring system
PCT/JP2016/055396 WO2017145283A1 (en) 2016-02-24 2016-02-24 Post-construction anchor, construction method for post-construction anchor method, and anchoring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/055396 WO2017145283A1 (en) 2016-02-24 2016-02-24 Post-construction anchor, construction method for post-construction anchor method, and anchoring system

Publications (1)

Publication Number Publication Date
WO2017145283A1 true WO2017145283A1 (en) 2017-08-31

Family

ID=59684964

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/055396 WO2017145283A1 (en) 2016-02-24 2016-02-24 Post-construction anchor, construction method for post-construction anchor method, and anchoring system

Country Status (2)

Country Link
JP (1) JPWO2017145283A1 (en)
WO (1) WO2017145283A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015087003A (en) * 2013-11-01 2015-05-07 株式会社豊和 Anchor blot
JP2015094459A (en) * 2013-11-14 2015-05-18 サンコーテクノ株式会社 Method for construction of expanding anchor
JP5771337B1 (en) * 2013-08-13 2015-08-26 Ｆｓテクニカル株式会社 Post-construction anchor, post-construction anchor construction method and post-construction anchor system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5771337B1 (en) * 2013-08-13 2015-08-26 Ｆｓテクニカル株式会社 Post-construction anchor, post-construction anchor construction method and post-construction anchor system
JP2015087003A (en) * 2013-11-01 2015-05-07 株式会社豊和 Anchor blot
JP2015094459A (en) * 2013-11-14 2015-05-18 サンコーテクノ株式会社 Method for construction of expanding anchor

Also Published As

Publication number Publication date
JPWO2017145283A1 (en) 2018-12-20

Similar Documents

Publication Publication Date Title
US4026186A (en) Self-drilling one-piece masonry anchor
KR101946896B1 (en) Post-installed anchor, method for installing post-installed anchor, post-installed anchor system, and rotation preventing jig
JP5633942B2 (en) Guardrail bolt
EP0845605B1 (en) Self-drilling anchor
GB2439633A (en) Fastener and fastening system
JP4777199B2 (en) Injection nozzle and pinning method using the same
JPWO2015022762A1 (en) Post-construction anchor, post-construction anchor construction method and post-construction anchor system
JP7094627B2 (en) Post-installed anchors and their construction methods
WO2017145283A1 (en) Post-construction anchor, construction method for post-construction anchor method, and anchoring system
CN103195362B (en) Integrated window sidetrack drilling tool
WO2019093177A1 (en) Anchor bolt for adhesive anchor, adhesive anchor, and adhesive anchor installation method
CN102691709B (en) Fixed system
US4050345A (en) Self drilling anchoring dowel
TW201241298A (en) Drilling device for percussion or rotary percussion drilling having a coupling sleeve
EP1251238B1 (en) Percussion rock drill
WO2016092675A1 (en) Post-installed anchor, post-installed anchor construction method, and post-installed anchor system
JP2016223116A (en) Hole-in anchor, and installation method thereof
JP2014218876A (en) Hole-in anchor, construction method for the same, and hole-in anchor system
JPS63254211A (en) Anchor stop member
US20100021251A1 (en) Drill bit
JP2016113762A (en) Anchor installed after concrete curing, installation method for anchor installed after concrete curing, and system for anchor installed after concrete curing
JP2011102618A (en) Bolt for civil engineering and construction
JP2016199967A (en) Post-construction anchor, construction method for post-construction anchor, and post-construction anchor system
JP7236732B2 (en) Post-Installed Anchor and Construction Method of Post-Installed Anchor
CN203201469U (en) Integrated window-opening sidetracking tool

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 2018501466

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16891440

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 16891440

Country of ref document: EP

Kind code of ref document: A1