Anchor system

Abstract

To provide a post-construction anchor or the like that has a simple structure and easy fixing work.SOLUTION: A post-construction anchor 10 to be fixed to a wall body W of lightweight concrete comprises an anchor body 11 having a tapered cone part 21 formed at a tip end part, a first tool hooking part 22 for screwing formed at a base end part, and a female screw part 23 formed on an inner peripheral surface, a fixing screw member 12 having a shaft part 32 screwed to a head part 31 and a female screw part 23, and having a second tool hooking part 33 for rotation stop at the tip end part of the shaft part 32, and a fixing body 13 interposed between the tapered cone part 21 and the head part 31 in a state where the shaft part 32 is screwed to the female screw part 23 and having an expansion part 41 expanded by the tapered cone part 21.SELECTED DRAWING: Figure 1

Description

Technical Field

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[0001] The present invention relates to a post-construction anchor that is fixed to a lightweight concrete wall through a pilot hole. Anchor system including It relates to.

Background Art

[0002] Conventionally, as this type of post-construction anchor, an anchor bolt for ALC (aerated concrete) for fixing a decorative board or the like to ALC is known (see Patent Document 1). This anchor bolt for ALC has a cylindrical anchor bolt body provided with a rotation prevention portion at one end and a plurality of openings in the circumferential direction near the other end, and a tapered portion formed in the openings toward the other end, a cylindrical locking member fitted to the anchor bolt body and having a plurality of locking pieces corresponding to the plurality of openings, and a bolt whose tip is screwed into a screw portion formed on the inner peripheral surface of the locking member, and the locking member is moved into the anchor bolt body by a rotation operation, and the locking pieces are projected radially outward from the openings. In construction, first, the anchor bolt body fitted with the locking member is inserted and driven into a recess provided in the ALC, and the anchor bolt body is prevented from rotating by the rotation prevention portion. Next, a decorative board is aligned with the ALC, and in this state, the bolt is inserted into the anchor bolt body. Here, the bolt is rotated to attract the locking member and move it into the anchor bolt body. As a result, the locking pieces of the locking member project from the openings of the anchor bolt body and are fixed so as to bite into the ALC.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In conventional ALC anchor bolts like this one, multiple openings are formed in the anchor bolt body to which the locking piece is hooked, so that the locking member does not detach from the anchor bolt body when the bolt is inserted through the recess and its tip is screwed into the locking member. In addition, multiple anti-rotation parts are provided on the outer surface of the anchor bolt body to prevent the anchor bolt body from rotating along with the locking member when the bolt is tightened against the locking member. As a result, the anchor bolt itself had an extremely complex structure, leading to high costs. Furthermore, to prevent the anchor bolt from rotating, it was necessary to embed it in the recess using a hammer or similar tool, which made the anchoring process cumbersome.

[0005] This invention provides a post-installed anchor with a simple structure that facilitates the anchoring process. Anchor system including The challenge is to provide [this]. [Means for solving the problem]

[0006] This invention Anchor system These are post-installed anchors that are fixed to the lightweight concrete wall through a pilot hole. The anchor system consists of a post-installed anchor and a special tool for fixing the post-installed anchor to the wall, and the post-installed anchor is The anchor comprises a cylindrical anchor body having a tapered cone portion formed at its tip, a first tool-holding portion for screwing formed at its base, and a female thread portion formed on its inner circumference, which is inserted into the pilot hole from the tapered cone portion side; a fixing screw member having a shaft portion that screws into the head portion and the female thread portion, and having a second tool-holding portion for preventing rotation at the tip of the shaft portion, which is inserted into the pilot hole from the head portion side; and a fixing body interposed between the tapered cone portion and the head portion with the shaft portion screwed into the female thread portion, and having an expanding portion that is expanded by the tapered cone portion, wherein the expanding portion is Using specialized tools, The anchor body is tightened while the fixing screw member is locked in place, causing it to expand. The dedicated tool comprises a screwing tool to which rotational force is applied by a wrench, and a rotation-preventing tool that resists rotational force by being inserted into and gripping the screwing tool. The screwing tool has a cylindrical tool body formed to be approximately the same diameter as the anchor body, a rotation output part formed at the tip of the cylindrical tool body and hooked onto a first tool hook, and a rotation input part formed at the base end of the cylindrical tool body to which a wrench is hooked. The rotation-preventing tool has a round rod-shaped tool body inserted into the cylindrical tool body and guiding the rotation of the cylindrical tool body, a hooking part formed at the tip of the rod-shaped tool body and hooked onto a second tool hook, and a gripping part formed at the base end of the rod-shaped tool body to maintain the non-rotating state of the rod-shaped tool body.

[0007] this Post-installed anchorsAccording to the configuration, the anchor body is tightened against the anchoring screw member via the first tool hook while the anchoring screw member is held in place via the second tool hook. As a result, the anchor body advances toward the anchoring screw member and the anchoring body, and the tapered cone portion of the anchor body pushes open the expanding portion of the anchoring body. The expanding portion, pushed open by the tapered cone portion, expands so as to bite into the wall at the periphery of the pilot hole and is then anchored to the wall. The anchor body, anchoring screw member, and anchoring body are assembled together by lightly screwing the anchoring screw member, to which the anchoring body is attached, into the anchor body. In this state, it can be easily set by simply inserting it into the pilot hole. Furthermore, the anchoring work can be easily performed by simply tightening the anchor body using the anchoring screw member as a stopper. In addition, since the anchor body is tightened against the fixing screw member, there is no need to provide a rotation-preventing structure on the anchor body, thus simplifying the structure. Furthermore, according to the configuration of the specialized tool, for a post-installed anchor that has been inserted into a pilot hole, the first rotation output part of the screwing tool is first hooked onto the first tool hook on the anchor body. Next, the rod-shaped tool body of the anti-rotation tool is inserted into the cylindrical tool body, and the hooking part of the anti-rotation tool is hooked onto the second tool hook on the fixing screw member. At this point, the gripping part of the anti-rotation tool is held to prevent the fixing screw member from rotating, and the anchor body is tightened with a wrench via the rotation input part of the screwing tool. In this case, the rotation of the screwing tool with a wrench (tightening the anchor body) is guided by the rod-shaped tool body of the anti-rotation tool, making the tightening of the anchor body easy and smooth. Furthermore, it is preferable to use a torque wrench to tighten the anchor body to a predetermined torque.

[0008] Other inventions Anchor system These are post-installed anchors that are fixed to the lightweight concrete wall through a pilot hole. The anchor system consists of a post-installed anchor and a special tool for fixing the post-installed anchor to the wall, and the post-installed anchor is The anchor body is a cylindrical shape having a stopper portion formed at the tip, a first tool-holding portion for screwing formed at the base, and a female thread portion formed on the inner circumference, and is inserted into the pilot hole from the stopper portion side; the anchor screw member is an anchor screw member having a head portion, a tapered cone portion connected to the head portion, a shaft portion connected to the tapered cone portion and screwed into the female thread portion, and a second tool-holding portion for rotation prevention formed at the tip of the shaft portion, and is inserted into the pilot hole from the head portion side; and the anchor body is interposed between the stopper portion and the tapered cone portion with the shaft portion screwed into the female thread portion, and has an expanding portion that is expanded by the tapered cone portion, the expanding portion is Using specialized tools, The anchor body is tightened while the fixing screw member is locked in place, causing it to expand. The dedicated tool comprises a screwing tool to which rotational force is applied by a wrench, and a rotation-preventing tool that resists rotational force by being inserted into and gripping the screwing tool. The screwing tool has a cylindrical tool body formed to be approximately the same diameter as the anchor body, a rotation output part formed at the tip of the cylindrical tool body and hooked onto a first tool hook, and a rotation input part formed at the base end of the cylindrical tool body to which a wrench is hooked. The rotation-preventing tool has a round rod-shaped tool body inserted into the cylindrical tool body and guiding the rotation of the cylindrical tool body, a hooking part formed at the tip of the rod-shaped tool body and hooked onto a second tool hook, and a gripping part formed at the base end of the rod-shaped tool body to maintain the non-rotating state of the rod-shaped tool body.

[0009] this Post-installed anchorsAccording to the configuration, the anchor body is tightened against the anchoring screw member via the first tool-holding portion, while the anchoring screw member is held in place via the second tool-holding portion. As a result, the anchor body advances toward the anchoring screw member and the anchoring body, and the tapered cone portion of the anchoring screw member pushes open the expanding portion of the anchoring body. The expanding portion, pushed open by the tapered cone portion, expands so as to bite into the wall at the periphery of the pilot hole and is anchored to the wall. The anchor body, anchoring screw member, and anchoring body are assembled together by lightly screwing the anchoring screw member, to which the anchoring body is attached, into the anchor body. In this state, it can be easily set by simply inserting it into the pilot hole. Furthermore, the anchoring work can be easily performed by simply tightening the anchor body using the anchoring screw member as a stopper. In addition, since the anchor body is tightened against the fixing screw member, there is no need to provide a rotation-preventing structure on the anchor body, thus simplifying the structure. Furthermore, according to the configuration of the specialized tool, for a post-installed anchor that has been inserted into a pilot hole, the first rotation output part of the screwing tool is first hooked onto the first tool hook on the anchor body. Next, the rod-shaped tool body of the anti-rotation tool is inserted into the cylindrical tool body, and the hooking part of the anti-rotation tool is hooked onto the second tool hook on the fixing screw member. At this point, the gripping part of the anti-rotation tool is held to prevent the fixing screw member from rotating, and the anchor body is tightened with a wrench via the rotation input part of the screwing tool. In this case, the rotation of the screwing tool with a wrench (tightening the anchor body) is guided by the rod-shaped tool body of the anti-rotation tool, making the tightening of the anchor body easy and smooth. Furthermore, it is preferable to use a torque wrench to tighten the anchor body to a predetermined torque. [Brief explanation of the drawing]

[0012] [Figure 1] This diagram shows the structure of a post-installed anchor according to the first embodiment, with (a) showing the anchor set in a pilot hole and (b) showing the anchor fixed in the pilot hole. [Figure 2] This is a structural diagram of the anchor body in a post-installed anchor. [Figure 3] This is a structural diagram of the anchoring screw component in a post-installed anchor. [Figure 4] This is a structural diagram of the anchoring body in a post-installed anchor. [Figure 5] These are structural diagrams of specialized tools for fixing post-installed anchors, specifically (a) a structural diagram of a screwing tool and (b) a structural diagram of a rotation-preventing tool. [Figure 6]It is an explanatory drawing showing the construction procedure of a post-construction anchor, including a diagram (a) of the state where a sub-hole is drilled, a diagram (b) of the state where the post-construction anchor is set in the sub-hole, a diagram (c) of the state where the post-construction anchor is fixed, and a diagram (d) of the state where the object to be fixed is constructed. [Figure 7] It is a structural diagram of a post-construction anchor according to the second embodiment, including a diagram (a) of the state where it is set in a sub-hole and a diagram (b) of the state where it is fixed in the sub-hole. [Figure 8] It is an exploded structural diagram of a post-construction anchor according to the second embodiment.

Mode for Carrying Out the Invention

[0013] Hereinafter, referring to the accompanying drawings, a post-construction anchor and an anchor system according to an embodiment of the present invention will be described. This post-construction anchor is fixed to a wall body of aerated concrete (hereinafter referred to as "ALC") among lightweight concrete (lightweight aggregate concrete, aerated concrete), and is fixed to a sub-hole drilled in the wall body by a screwing method.

[0014] [First Embodiment] Figure 1(a) is a structural diagram of a post-construction anchor in a state where it is set in a sub-hole, and Figure 1(b) is a structural diagram of a post-construction anchor in a state where it is fixed in a sub-hole. As shown in both figures, the post-construction anchor 10 includes a cylindrical anchor body 11 that forms the main body in the sub-hole H, a fixing screw member 12 that is screwed into the anchor body 11 from the bottom Ha side of the hole of the sub-hole H, and a fixing body 13 interposed between the anchor body 11 and the fixing screw member 12. And the anchor body 11, the fixing screw member 12, and the fixing body 13 are all formed of steel, stainless steel, or the like without displacement.

[0015] In this post-installed anchor 10, the anchor body 11 is tightened with the fixing screw member 12 in a non-rotating position, causing the fixing body 13 to expand. This expansion of the fixing body 13 fixes the post-installed anchor 10 to the ALC wall W. Furthermore, the roofing material R (object to be fixed) is installed using the ALC wall W as a base by screwing the fixing bolt 15 into the fixed post-installed anchor 10 (see Figure 1(b)).

[0016] As shown in Figures 1 and 2, the anchor body 11 has a tapered cone portion 21 at its tip and a first tool-holding portion 22 for screwing at its base. The anchor body 11 also has a female thread portion 23 formed across its entire inner circumference. The tapered cone portion 21 is a functional part that expands the expanding portion 41 of the anchoring body 13, which will be described later, and is formed with a taper angle of approximately 60°.

[0017] The first tool-holding portion 22 is the part to which the screwing tool 50A, described later, is attached, and is composed of a pair of first tool grooves 25 with a "U" shape in cross-section that traverse the base end of the anchor body 11 in the radial direction (see Figure 2). During anchoring, the anchor body 11 is tightened (rotated) via this first tool-holding portion 22 by the screwing tool 50A, described later.

[0018] The female threaded portion 23 is the part into which the fixing screw member 12 is screwed from the tip side, and the fixing bolt 15 is screwed from the base end side. In other words, by tightening the anchor body 11 with the fixing screw member 12 in a non-rotating position, the post-installed anchor 10 is fixed to the wall W, while by tightening the fixing bolt 15 to the post-installed anchor 10 after it has been fixed, the roofing material R is fixed to the ALC wall W.

[0019] As shown in Figures 1 and 3, the anchoring screw member 12 is integrally formed with a head portion 31 that abuts against the bottom Ha of the pilot hole H, and a shaft portion 32 that extends from the head portion 31 and screws into the female screw portion 23. A second tool-holding portion 33 for preventing rotation is formed at the tip of the shaft portion 32. The head portion 31 is the part that clamps the anchoring body 13 between itself and the anchor body 11 (tapered cone portion 21), and is formed to the same diameter as the anchor body 11 and the anchoring body 13.

[0020] The shaft portion 32 is the part that screws into the female thread portion 23 of the anchor body 11 when the anchoring body 13 is inserted through it. As described above, in the post-installed anchor 10 of this embodiment, the anchor body 11 is tightened against the shaft portion 32 (anchoring thread member 12). As a result, the tapered cone portion 21 of the anchor body 11 bites into the anchoring body 13, and the expanding portion 41 of the anchoring body 13, which will be described later, expands.

[0021] The second tool hook portion 33 is the part to which the anti-rotation tool 50B, described later, is hooked, and is composed of a second tool groove 35 with a "U" shaped cross-section that traverses the tip of the shaft portion 32 (on the anchor body 11 side) in the radial direction (see Figure 3). When the anchor body 11 is tightened by the screwing tool 50A during anchoring, the anti-rotation tool 50B prevents the anchoring screw member 12 from rotating along with it via this second tool hook portion 33.

[0022] As shown in Figures 1 and 4, the anchoring body 13 is integrally formed with an expanding portion 41 that is expanded by the tapered cone portion 21 and an anchoring body base 42 that supports the expanding portion 41. As described above, the anchoring body 13 is interposed between the tapered cone portion 21 and the head portion 31, has an outer diameter the same as that of the anchor body 11 and the anchoring screw member 12, and has an inner diameter through which the shaft portion 32 of the anchoring screw member 12 is inserted, and is formed in a cylindrical shape overall.

[0023] The expanding section 41 is divided into four equal parts in the circumferential direction by four slits 44 extending from the end to the anchoring base 42. As a result, the expanding section 41 is composed of four claw pieces 45 evenly arranged in the circumferential direction and four constricted sections 46 provided between each claw piece 45 and the anchoring base 42. Each claw piece 45 has a contact surface that follows the tapered surface of the tapered cone section 21. The four constricted sections 46 are formed by machining annular grooves on the bases of the four claw pieces 45. The anchoring base 42 is formed in a ring shape and supports (holds) the four claw pieces 45 in an expandable manner via the four easily deformable constricted sections 46.

[0024] As the anchor body 11 tightens, the tapered cone portion 21 advances relative to the anchoring body 13 sandwiched between the tapered cone portion 21 and the head portion 31. Due to the component force generated between the tapered cone portion 21 and each claw portion 45, the four claw portions 45 expand radially outward, starting from the four constricted portions 46. Unlike concrete, in ALC, the four expanding claw portions 45 bite into the inner circumferential wall Hb of the pilot hole H. As a result, the post-installed anchor 10 is fixed to the ALC wall W with a predetermined pull-out strength.

[0025] [Specialized tools] Next, we will explain the installation procedure (installation method) for the post-installed anchor 10 configured in this way. Before that, we will explain the special tool 50 used to tighten the anchor body 11 during this installation. The "anchor system" as referred to in the claims consists of the post-installed anchor 10 and this special tool 50.

[0026] Figure 5 shows the special tool 50, which includes a screwing tool 50A (Figure 5(a)) to which rotational force is applied by a wrench RR, and an anti-rotation tool 50B (Figure 5(b)) that is inserted through the screwing tool 50A and grips it to resist the rotational force of the screwing tool 50A. Specifically, the anti-rotation tool 50B prevents the fixing screw member 12 from rotating, while the screwing tool 50A tightens the anchor body 11 (see Figure 6(c)). Similar to the post-installed anchor 10, the screwing tool 50A and the anti-rotation tool 50B are also made of steel, stainless steel, or the like.

[0027] As shown in Figure 5(a), the screwing tool 50A has a cylindrical tool body 61, a rotation output part 62 formed at the tip of the cylindrical tool body 61 and hooked onto the first tool hook part 22, and a rotation input part 63 formed at the base end of the cylindrical tool body 61 and hooked onto the wrench RR, and these are integrally formed. The screwing tool 50A of this embodiment has an attachment function that transmits the rotational force from the wrench RR to the anchor body 11 set in the pilot hole H.

[0028] The cylindrical tool body 61 is formed to have approximately the same outer and inner diameter as the anchor body 11. Furthermore, the cylindrical tool body 61 has sufficient length in the axial direction to allow for sufficient operating space for the wrench RR between itself and the wall W (see Figure 6(c)).

[0029] The rotation output section 62 is composed of a pair of first projections 65 having a shape complementary to a pair of first tool grooves 25 that constitute the first tool hook section 22 of the anchor body 11. By engaging the rotation output section 62 with the first tool hook section 22 from the axial direction, the rotation applied to the screwing tool 50A via the wrench RR is transmitted to the anchor body 11.

[0030] The rotation input section 63 has the shape of a hexagonal bolt head, and the wrench RR is designed to be hooked onto it. In other words, in this embodiment, the screwing tool 50A is rotated by the wrench RR, and this rotational force is transmitted to the anchor body 11, thereby tightening the anchor body 11. It is preferable to use a ratchet wrench (box wrench) as the wrench RR.

[0031] The screwing tool 50A, configured in this way, is used with the anti-rotation tool 50B inserted through it (see Figure 6(c)). In other words, the structure allows the screwing tool 50A to rotate using the anti-rotation tool 50B as a guide axis, enabling smooth screwing of the anchor body 11 with the wrench RR.

[0032] As shown in Figure 5(b), the anti-rotation tool 50B includes a round rod-shaped tool body 71 that is inserted into the cylindrical tool body 61 and guides the rotation of the cylindrical tool body 61, a hooking portion 72 formed at the tip of the rod-shaped tool body 71 and hooked onto the second tool hooking portion 33, and a gripping portion 73 formed at the base end of the rod-shaped tool body 71 and maintaining the non-rotating state of the rod-shaped tool body 71.

[0033] The rod-shaped tool body 71 has the function of preventing the fixing screw member 12 from rotating when tightening the anchor body 11, and the function of a guide shaft that guides the screwing operation (rotation) of the screwing tool 50A. For this reason, the rod-shaped tool body 71 is inserted into the inside of the anchor body 11 until it passes through the screwing tool 50A and abuts against the fixing screw member 12. The diameter of the rod-shaped tool body 71 is formed to be slightly smaller than the inner diameter of the screwing tool 50A and the anchor body 11. In addition, it has sufficient length so that the gripping portion 73 does not interfere with the screwing operation of the wrench RR when the fixing screw member 12 is prevented from rotating (see Figure 6(c)).

[0034] The locking portion 72 is composed of a second projection 75 having a shape complementary to the second tool groove 35 that constitutes the second tool hook portion 33 of the fixing screw member 12. By engaging the locking portion 72 with the second tool hook portion 33 from the axial direction and gripping the gripping portion 73 to keep the rotation-preventing tool 50B in a non-rotating state, the fixing screw member 12 is prevented from rotating along with the tightening and rotating anchor body 11.

[0035] The gripping portion 73 is the part that the worker grips to prevent rotation, and is formed in the shape of a disc with a diameter of about 5 cm. The worker grips the gripping portion 73 with their left hand and locks the latching portion 72 against the fixing screw member 12, while operating the wrench RR with their right hand to tighten the anchor body 11 via the screwing tool 50A. As a result, the anchor body 11 is tightened onto the fixing screw member 12, and the expanding portion 41 of the fixing body 13 expands. The shape of the gripping portion 73 can be anything that is easy to grip, such as a sphere.

[0036] [Installation Procedure] Now, with reference to Figure 6, the construction procedure (construction method) for the post-installed anchor 10 of this embodiment will be described. This construction procedure comprises a drilling step (Figure 6(a)) in which pilot holes H are drilled in the ALC wall W, a setting step (Figure 6(b)) in which post-installed anchors 10 are inserted and set into the drilled pilot holes H, a fixing step (Figure 6(c)) in which the fixing body 13 is expanded to fix the post-installed anchors 10 to the wall W, and a fixing step (Figure 6(d)) in which the roofing material R is fixed to the wall W using the fixed post-installed anchors 10.

[0037] In the drilling process shown in Figure 6(a), a drilling device D is used to drill pilot holes H at the locations to be drilled in the wall W. The drilling device D is preferably a rotary hammer drill equipped with a concrete drill bit Da or an electric drill equipped with a diamond drill bit Da. The drill bit Da should be approximately 0.5 to 1 mm larger in diameter than the anchor body 11. The depth of the pilot hole H should be equivalent to the combined length of the anchor body 11, the anchoring body 13, and the anchoring screw member 12. It is preferable to clean the pilot hole H either in parallel with or after drilling it.

[0038] In the setting process shown in Figure 6(b), the post-installed anchor 10 is inserted and set into the pilot hole H so as to abut against the bottom of the hole Ha. The post-installed anchor 10 to be set has the anchoring screw member 12, which has the anchoring body 13 inserted through it, screwed onto the anchor body 11 and lightly tightened to assemble them together, and is then inserted into the pilot hole H from the anchoring screw member 12 side. As a result, the base end of the anchor body 11 is flush with the opening Hc of the pilot hole H, or slightly recessed from the opening Hc.

[0039] In the anchoring process shown in Figure 6(c), the anchor body 11 is tightened using a screwing tool 50A and a rotation-preventing tool 50B, with the anchoring screw member 12 in a rotation-preventing state. The procedure is as follows: First, the screwing tool 50A is locked onto the anchor body 11, and the wrench RR is hooked onto the screwing tool 50A. Next, the rotation-preventing tool 50B is inserted through the screwing tool 50A, and the tip of the rotation-preventing tool 50B is locked onto the anchoring screw member 12.

[0040] At this point, the worker grips the handle 73 to stabilize the anti-rotation tool 50B, then operates the wrench RR to rotate the screwing tool 50A and tighten the anchor body 11. As the anchor body 11 is tightened, the operation of the wrench RR becomes heavier, and the worker can feel that the anchoring body 13 has expanded. Once the anchoring body 13 has expanded, the worker removes the screwing tool 50A and the anti-rotation tool 50B in the reverse order of the above procedure, and the work is completed. It is preferable to use a wrench RR that can tighten the anchor body 11 with a constant torque.

[0041] In the fixing process shown in Figure 6(d), the roofing material R is fixed by screwing the fixing bolts 15 into the anchor body 11 from the outside. The roofing material R and waterproof sheet, with clearance holes formed in the predetermined positions, are placed against the wall W, and the fixing bolts 15 are screwed into the anchor body 11 from above to fix the roofing material R to the wall W, which is the base. This completes the series of operations.

[0042] As described above, according to the post-installed anchor 10 of the first embodiment, the anchor body 11, the fixing screw member 12, and the fixing body 13 are assembled together by lightly screwing the fixing screw member 12, to which the fixing body 13 is attached, into the anchor body 11. In this state, it can be easily set by simply inserting it into the pilot hole H. Furthermore, the fixing work can be easily performed by simply tightening the anchor body 11 using the fixing screw member 12 as a rotation stopper. Moreover, since the anchor body 11 is tightened against the fixing screw member 12, there is no need to provide a rotation stopper structure on the anchor body 11, thus simplifying the structure.

[0043] On the other hand, in the dedicated tool 50, the rotation of the screwing tool 50A by the wrench RR (tightening of the anchor body 11) is guided by the rod-shaped tool body 71 of the anti-rotation tool 50B, so that the tightening work of the anchor body 11 can be performed easily and smoothly.

[0044] [Second Embodiment] Next, the post-installed anchor 10A according to the second embodiment will be described with reference to Figures 7 and 8. The post-installed anchor 10A of the second embodiment also comprises a cylindrical anchor body 11A, a fixing screw member 12A that screws into the anchor body 11A, and a fixing body 13A interposed between the anchor body 11A and the fixing screw member 12A. In this post-installed anchor 10A, the fixing body 13A, which has the same structure as in the first embodiment, is incorporated inverted. Correspondingly, the tapered cone portion 21A is provided on the fixing screw member 12A instead of the anchor body 11A.

[0045] The anchor body 11A has a stopper portion 81 formed at its tip in place of the tapered cone portion 21A. Also, similar to the first embodiment, a first tool-holding portion 22 for screwing is formed at the base end of the anchor body 11A, and a female thread portion 23 is formed on the inner circumferential surface. In this case, the stopper portion 81 is formed flat and abuts against the anchor base 42 of the inverted anchor body 13A.

[0046] The anchoring screw member 12A is integrally formed with a head portion 31, a tapered cone portion 21A connected to the head portion 31, and a shaft portion 32 connected to the tapered cone portion 21A that screws into the female screw portion 23. In this case as well, a second tool-holding portion 33 for rotation prevention is formed at the tip of the shaft portion 32. In this post-installed anchor 10A as well, the anchor body 11A is tightened against the shaft portion 32 (anchoring screw member 12A), the tapered cone portion 21A of the anchoring screw member 12A bites into the anchoring body 13A, and the expanding portion 41 of the anchoring body 13A expands.

[0047] The anchoring body 13A has the same structure as that of the first embodiment, and is integrally formed with an expanding portion 41 that is expanded by the tapered cone portion 21A, and an anchoring body base 42 that supports the expanding portion 41. However, the anchoring body 13A of the second embodiment is the same as that of the first embodiment but is incorporated upside down, and as a result it is interposed between the abutment portion 81 of the anchor body 11A and the tapered cone portion 21A.

[0048] The post-installed anchor 10A of the second embodiment, configured in this way, is also installed using the same dedicated tools 50 (screwing tool 50A, anti-rotation tool 50B) and installation procedure as the first embodiment. That is, the installation procedure in this case also includes a drilling step, a setting step, a fixing step, and a fixing step (see Figures 6 and 7).

[0049] As described above, according to the post-installed anchor 10A of the second embodiment, the anchor body 11A, the anchoring screw member 12A, and the anchoring body 13A are assembled together by lightly screwing the anchoring screw member 12A, to which the anchoring body 13A is attached, into the anchor body 11A. In this state, it can be easily set by simply inserting it into the pilot hole H. Furthermore, the anchoring work can be easily performed by simply tightening the anchor body 11A using the anchoring screw member 12A as a rotation stopper. Moreover, since the anchor body 11A is tightened against the anchoring screw member 12A, there is no need to provide a rotation stopper structure on the anchor body 11A, thus simplifying the structure. [Explanation of Symbols]

[0050] 10, 10A... Post-installed anchor, 11, 11A... Anchor body, 12, 12A... Fixing screw member, 13, 13A... Fixing body, 21, 21A... Tapered cone section, 22... First tool hook section, 23... Female thread section, 31... Head section, 32... Shaft section, 33... Second tool hook section, 41... Expanding section, 50... Special tool, 50A... Screwing tool, 50B... Anti-rotation tool, 61... Cylindrical tool body, 62... Rotation output section, 63... Rotation input section, 71... Rod-shaped tool body, 72... Hooking section, 73... Gripping section, 81... Butt section, H... Pilot hole, W... Wall body,

Claims

1. An anchoring system comprising a post-installed anchor that is fixed to a lightweight concrete wall through a pilot hole, and a special tool for fixing the post-installed anchor to the wall, The aforementioned post-installed anchor is A cylindrical anchor body having a tapered cone portion formed at the tip, a first tool-holding portion for screwing formed at the base end, and a female thread portion formed on the inner circumference, which is inserted into the pilot hole from the tapered cone portion side, A fixing screw member having a head portion and a shaft portion that screws into the female screw portion, and having a second tool hook portion at the tip of the shaft portion for preventing rotation, which is inserted into the pilot hole from the head portion side, The fixing body is interposed between the tapered cone portion and the head portion when the shaft portion is screwed into the female thread portion, and has an expanding portion that is expanded by the tapered cone portion, The aforementioned expanding portion is expanded by tightening the anchor body with the aforementioned special tool while the fixing screw member is held in place. The aforementioned specialized tool is The device comprises a screwing tool to which rotational force is applied by a wrench, and an anti-rotation tool that resists the rotational force by being inserted into and gripping the screwing tool. The screwing tool comprises a cylindrical tool body formed to be substantially the same diameter as the anchor body, a rotation output section formed at the tip of the cylindrical tool body and secured to the first tool hook, and a rotation input section formed at the base end of the cylindrical tool body and secured to the wrench. The anchoring system is characterized by comprising: a round rod-shaped tool body inserted through the cylindrical tool body and guiding the rotation of the cylindrical tool body; a locking portion formed at the tip of the rod-shaped tool body and engaged with the second tool hook portion; and a gripping portion formed at the base end of the rod-shaped tool body and maintaining the non-rotating state of the rod-shaped tool body.

2. An anchoring system comprising a post-installed anchor that is fixed to a lightweight concrete wall through a pilot hole, and a special tool for fixing the post-installed anchor to the wall, The aforementioned post-installed anchor is A cylindrical anchor body having a stopper portion formed at the tip, a first tool-holding portion for screwing formed at the base end, and a female thread portion formed on the inner circumference, which is inserted into the pilot hole from the stopper portion side, A fixing screw member having a head portion, a tapered cone portion connected to the head portion, a shaft portion connected to the tapered cone portion and screwed into the female screw portion, and a second tool-holding portion formed at the tip of the shaft portion for preventing rotation, which is inserted into the pilot hole from the head portion side, The fixing body is interposed between the abutment portion and the tapered cone portion when the shaft portion is screwed into the female thread portion, and has an expanding portion that is expanded by the tapered cone portion, The aforementioned expanding portion is expanded by tightening the anchor body with the aforementioned special tool while the fixing screw member is held in place. The aforementioned specialized tool is The device comprises a screwing tool to which rotational force is applied by a wrench, and an anti-rotation tool that resists the rotational force by being inserted into and gripping the screwing tool. The screwing tool comprises a cylindrical tool body formed to be substantially the same diameter as the anchor body, a rotation output section formed at the tip of the cylindrical tool body and secured to the first tool hook, and a rotation input section formed at the base end of the cylindrical tool body and secured to the wrench. The anchoring system is characterized by comprising: a round rod-shaped tool body inserted through the cylindrical tool body and guiding the rotation of the cylindrical tool body; a locking portion formed at the tip of the rod-shaped tool body and engaged with the second tool hook portion; and a gripping portion formed at the base end of the rod-shaped tool body and maintaining the non-rotating state of the rod-shaped tool body.

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