Anchor pins and pinning methods

Abstract

To provide an anchor pin or the like capable of repairing a wall body constituting a curtain wall material with a finishing material adhered suitably without using adhesive agent.SOLUTION: An anchor pin 10 used for a pinning method repairing a wall body 1 constituting a curtain wall body 2 with a finishing material 4 adhered comprises an anchor body 11 including an expansion part 16 at a tail end and having an end abutted onto a hole bottom 8a of a prepared hole 8, an expansion cone 13 expanding the expansion part 16 by a taper part 17 formed at a tip by being forwarded to the anchor body 11, a fixed screw member 12 interposed between the anchor body 11 and the expansion cone 13 and converting a rotation of the expansion cone 13 relative to the anchor body 11 into a forward movement and a holding screw member 14 including a head 18 holding the finishing material 4 and having a shaft 31 threaded into the tail end side of the expansion cone 13.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a pinning method, which is a repair method for a wall having a finishing material such as stone or large tiles attached to a curtain wall material, and to an anchor pin used in the pinning method and the pinning method. [Background technology]

[0002] Conventionally, as this type of pinning method, there is known a method for repairing stone-faced (stone material) or tile-faced (large tile) walls that have developed a so-called "floating" (see Patent Document 1). In this pinning method, the base material to which the finishing material such as stone is attached is made of an extruded cement board with a hollow structure, and the stone is so-called "ball-shaped" attached to the base material. The pinning method in this case includes a drilling step of drilling an insertion hole that penetrates through part of the stone and base material to reach the hollow part of the base material, aiming at the void area of ​​the block laying, a fitting step of fitting a bottomed cylindrical body to the insertion hole, an injection step of injecting adhesive into the insertion hole and inside the cylindrical body, and an insertion step of inserting an anchor pin into the insertion hole via the cylindrical body. The cylindrical body has a number of through holes on its circumferential surface, and when adhesive is injected into the inside of the cylindrical body, the adhesive that flows out from the through holes covers the outer surface of the cylindrical body. As a result, in the void area or hollow portion, the adhesive that has flowed out from the through hole hardens, increasing the pull-out strength of the anchor pin through the cylindrical body that receives the base material, thereby firmly fixing the loose stone. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-204378 A Summary of the Invention [Problem to be solved by the invention]

[0004] In this conventional pinning method, the cylindrical body, anchor pin, and adhesive work together to firmly attach the finishing material (stone) to the relatively weak base material (extruded cement board). On the other hand, in this type of wall in an underground shopping mall or passageway, groundwater may constantly seep into or adhere to the base material. In such cases, the pinning method has a problem in that the moisture prevents the base material from coming into contact with the adhesive, making it inappropriate (impossible) to use adhesive. In other words, in this type of wall that is exposed to moisture or humidity, there is a problem in that it is not suitable to use adhesive with the pinning method.

[0005] An object of the present invention is to provide an anchor pin and a pinning method capable of appropriately repairing a wall having a finishing material attached to a curtain wall material without using an adhesive. [Means for solving the problem]

[0006] The anchor pin of the present invention is used in a pinning method for repairing a wall where a finishing material is affixed to a curtain wall material, and is an anchor pin that penetrates the finishing material and is attached to a pilot hole drilled in the curtain wall material, and is characterized in that it comprises an anchor body which has an expansion portion at the tail end and whose tip portion is abutted against the bottom of the pilot hole, an expansion cone which advances relative to the anchor body to expand the expansion portion by a tapered portion formed at the tip portion, a screw mechanism interposed between the anchor body and the expansion cone which converts the rotation of the expansion cone relative to the anchor body into forward movement, and a press screw member which has a head which presses the finishing material and whose shaft portion screws into the tail end side of the expansion cone.

[0007] According to this configuration, when the expansion cone is advanced via the screw mechanism against the anchor body that is butted against the bottom of the pilot hole, the tapered portion of the expansion cone expands the expansion portion of the anchor body, and the anchor body and the expansion cone are integrated via the screw mechanism. Curtain wall materials are fragile, unlike structural materials, but the expanded expansion portion will sufficiently bite into the curtain wall material and will be fixed with sufficient pull-out resistance. This allows the anchor body and expansion cone to be mechanically and firmly fixed (anchored) to the curtain wall material. When the cap screw is screwed into this expansion cone, the head of the cap screw presses the finishing material, firmly fixing the finishing material. In this way, finishing material that has become "floated" or the like can be mechanically fixed to the curtain wall material, and a wall in which a finishing material is attached to a curtain wall material can be appropriately repaired without using adhesive.

[0008] In this case, the screw mechanism has an anchoring screw member, approximately half of which on the tip side screws into the tail end side of the anchor body and approximately half of which on the tail end side screws into the tip side of the expansion cone, and it is preferable that the anchoring screw member screws non-rotatably into either one of the anchor body or the expansion cone.

[0009] According to this configuration, a female thread is formed in each of the anchor body and the expansion cone, and the fixing screw member is screwed non-rotatably into the anchor body, or screwed non-rotatably into the expansion cone. In the former case, the expansion cone is screwed into approximately half of the tail end side of the fixing screw member protruding from the anchor body, and the expansion part of the anchor body is expanded by tightening. In the latter case, the expansion part of the anchor body is expanded by screwing approximately half of the tip end side of the fixing screw member protruding from the expansion cone into the anchor body, and tightening. In this way, a mechanical and easy-to-construct expansion structure (fixing structure) of the anchor body can be configured by a simple combination of male and female threads.

[0010] Similarly, the screw mechanism preferably has either a body male threaded portion that extends beyond the expansion portion toward the tail end of the anchor body and screws onto the tip end of the expansion cone, or a cone male threaded portion that extends beyond the tapered portion toward the tip end of the expansion cone and screws onto the tail end of the anchor body.

[0011] According to this configuration, the expansion cone is screwed into the main body male threaded portion extending from the tail end of the anchor body and tightened to expand the expansion portion of the anchor body. Alternatively, the cone male threaded portion extending from the tip end of the expansion cone is screwed into the anchor body and tightened to expand the expansion portion of the anchor body. In this way, a mechanical and easy-to-construct expansion structure (fixing structure) for the anchor body can be constructed with a small number of parts.

[0012] In addition, it is preferable that the anchor body has a rotation-preventing portion at its tip that prevents the anchor body from rotating against the bottom of the pilot hole.

[0013] According to this configuration, when the expansion cone is screwed into the anchor body via the screw mechanism, the anchor body does not rotate together with the expansion cone, and the expansion part can be expanded smoothly and quickly. Note that it is preferable to screw the expansion cone into the anchor body using an impact driver or the like.

[0014] In this case, it is preferable that the tip of the rotation stopper portion, which abuts against the bottom of the prepared hole, is formed in a straight line.

[0015] According to this configuration, although the curtain wall material constituting the bottom of the hole is fragile, the anti-rotation portion does not sink into the bottom of the hole, and therefore properly performs the anti-rotation function.

[0016] On the other hand, it is preferable that the curtain wall material has a hollow structure defined by two face shell portions, one on the front and one on the back, and a plurality of web portions extending between the two face shell portions, the pilot hole penetrates the finishing material and the face shell portion on the front side, with the inner surface of the face shell portion on the back side serving as the hole bottom, and the anchor body has a length such that, when the tip is abutted against the hole bottom, the expansion portion is positioned within the thickness of the face shell portion on the front side.

[0017] With this configuration, even if the curtain wall material is hollow, the expanded portion of the anchor body that abuts against the bottom of the pilot hole is located within the thickness of the face shell portion on the front side of the curtain wall material. In other words, the anchor body is fixed within the face shell portion on the front side. Therefore, even if the curtain wall material is not only solid (solid part) but also hollow, the anchor body can be reliably fixed and the finishing material can be properly fixed.

[0018] It is also preferable that the finishing material is either stone or large tile.

[0019] According to this configuration, stone materials and large tiles that are laid using a so-called "balloon" or "bead" construction can be properly fixed to the curtain wall material.

[0020] The pinning method of the present invention is a pinning method using the above-mentioned anchor pin to repair a wall to which a finishing material has been affixed via adhesive materials scattered on the curtain wall material, and is characterized by comprising the following steps: a drilling step of drilling a pilot hole through the finishing material to a predetermined depth in the curtain wall material in the void area free from the adhesive materials, a mounting step of mounting the anchor body in the pilot hole so that the tip of the anchor body abuts against the bottom of the pilot hole, a fixing step of expanding the expansion portion of the anchor body via a screw mechanism using an expansion cone inserted into the pilot hole, and a pressing step of screwing a press screw member into the expansion cone so as to press down on the finishing material.

[0021] According to this configuration, when the expansion cone is advanced relative to the anchor body via the screw mechanism, the expansion portion of the anchor body expands and the anchor body and the expansion cone become one body. Curtain wall materials are fragile, unlike structural materials, but the expanded expansion portion fully bites into the curtain wall material and is fixed with sufficient pull-out resistance. This allows the anchor body and expansion cone to be mechanically and firmly fixed (anchored) to the curtain wall material. When a cap screw is screwed into this expansion cone, the head of the cap screw presses the finishing material, firmly fixing the finishing material. In this way, finishing material that has become "floated" or the like can be mechanically fixed to the curtain wall material, and a wall in which a finishing material is attached to a curtain wall material can be appropriately repaired without using adhesive. [Brief description of the drawings]

[0022] [Figure 1] FIG. 2 is a front view of a wall body to which the pinning method of the embodiment has been applied. [Diagram 2] FIG. 2 is a cross-sectional view illustrating a pinning method according to an embodiment. [Diagram 3] FIG. [Figure 4] 1A is a plan view and FIG. 1B is a side view showing the structure of the anchor body. [Diagram 5] FIG. 2A is a plan view of the expanding cone and FIG. 2B is an explanatory diagram of the driving state. [Figure 6] FIG. 13 is a plan view of an expansion cone according to a modified example. [Figure 7] 1A and 1B are cross-sectional views showing the construction procedure (1) in the pinning method, with (a) showing the drilling process and (b) showing the installation process. [Figure 8] 11 is a cross-sectional view showing the construction procedure (2) in the pinning method, with (c) showing the fixing process and (d) showing the pressing process. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, an anchor pin and a pinning method according to one embodiment of the present invention will be described with reference to the attached drawings. The pinning method (anchor pinning method) is used to repair walls such as exterior walls and interior walls of stairwells and halls where finishing materials such as tiles and stone have "floated" (peeling off). The pinning method of the embodiment is intended to repair walls in which stone is piled on a curtain wall material, but this wall is a passage wall partially exposed to groundwater, and the curtain wall material is composed of concrete blocks stacked in blocks. For this reason, the anchor pins used in the pinning method of the embodiment are not so-called adhesive fixing ones, but mechanical fixing ones.

[0024] [Embodiment] Fig. 1 is a front view of a wall body to which the pinning method of the embodiment has been applied, and Fig. 2 is a cross-sectional view for explaining the pinning method of the embodiment. As shown in both figures, a wall body 1 has a curtain wall block 2 (curtain wall material) formed by stacking concrete blocks 2a, and a stone material 4 (finishing material) attached to the surface of the curtain wall block 2 via an attachment material 3. Needless to say, the concrete block 2a has a hollow structure having a plurality of hollow portions 7 defined by two face shell portions 5a, 5b on the front and back, and a plurality of web portions 6 extending between the two face shell portions 5a, 5b.

[0025] The pilot holes 8 for the anchor pins 10 formed in the curtain wall block 2 may be drilled facing the hollow portion 7 (see Figure 2) or facing the web portion 6, but in either case the hole bottom 8a is located on the inner surface of the rear face shell portion 5b. In other words, the drilling dimension of the pilot holes 8 is the distance from the surface of the stone 4 to the inner surface of the rear face shell portion 5b, so that the anchor pins 10 are fixed inside the front face shell portion 5a.

[0026] The stone 4 is attached to the surface of the curtain wall block 2 by applying mortar in a mortar-like pattern. That is, the stone 4 has adhesive material 3 (mortar) piled up in five scattered (island-like) locations on its back surface, and is attached to the curtain wall block 2 in this state. As a result, between the stone 4 1 and the curtain wall block 2, there are adhesive materials 3 provided in five locations within the plane, and gap areas 9 outside the adhesive materials 3. In addition, joints 4a are provided between the stone materials 4.

[0027] Although not specifically shown, in this embodiment, it is assumed that peeling ("floating") occurs between some of the adhesive materials 3 and the stone materials 4, or between some of the adhesive materials 3 and the curtain wall block 2. Therefore, pinning is performed at four locations for each stone material 4, targeting the above-mentioned gap region 9. The stone materials 4 include standard stone (marble, granite, etc.), terrazzo, terracotta, imitation stone, etc., and the adhesive materials 3 include mortar, adhesives, plaster, etc.

[0028] As shown in Figure 2, the anchor pin 10 used in this pinning method is composed of four parts, in order from the back of the pilot hole 8: an anchor body 11, an anchoring screw member 12, an expansion cone 13, and a pressure screw member 14. In this pinning method, the anchor body 11 with the fixing screw member 12 screwed into it is inserted into the pilot hole 8, and the expansion cone 13 is screwed into it and tightened, fixing the anchor body 11 and the expansion cone 13 to the curtain wall block 2. Next, the pressure screw member 14 is screwed into the expansion cone 13 to fix the stone material 4 to the expansion cone 13.

[0029] [Anchor pin] 2 and 3, the anchor pin 10 comprises an anchor body 11 having an expansion portion 16 at the tail end, an expansion cone 13 having a tapered portion 17 at its tip end for expanding the expansion portion 16 of the anchor body 11, an anchor screw member 12 having approximately half of its tip end screwed into the anchor body 11 and approximately half of its tail end screwed into the expansion cone 13, and a pressure screw member 14 having a head portion 18 for holding the stone 4 and screwed into the tail end of the expansion cone 13. The anchor body 11, the expansion cone 13, the anchor screw member 12 and the pressure screw member 14 are made of steel, stainless steel or the like.

[0030] 3 and 4, the anchor body 11 is formed with a diameter slightly smaller than that of the pilot hole 8, and has a rotation-preventing portion 21 formed at the tip, an expanding portion 16 formed at the tail end, and a fixed female screw portion 22 formed on the tail end side so as to be continuous with the expanding portion 16. The rotation-preventing portion 21 is machined by cutting off both ends, and the tip that abuts against the hole bottom 8a of the pilot hole 8 (the inner surface of the face shell portion 5b on the back side) is formed in a straight line (see FIGS. 4(a) and (b)).

[0031] Although details will be described later, when the expansion cone 13 is screwed into the anchor body 11 via the fixing screw member 12, the rotation stopper 21 hits the bottom 8a of the pilot hole 8 to prevent the anchor body 11 from rotating together. The straight tip of the rotation stopper 21 has the shape of a flat head screwdriver, and functions as a rotation stopper due to the rotation resistance between the bottom 8a of the pilot hole 8 and the rotation stopper. The center of the tip of the rotation stopper 21 may be recessed in the axial direction in an inverted "V" or "U" shape. Also, as shown by the two-dot chain line in Figure 4(b), the rotation stopper 21 may be machined so that both sides are cut off in a "V" shape.

[0032] The expansion section 16 is formed by making a deep cross-shaped cut in the tail end of the cylindrical anchor body 11 (see FIG. 4(a)). As will be described in detail later, the expansion section 16 is formed by strongly pushing the tapered section 17 of the expansion cone 13 through the fixing screw member 12, so that the four cross-shaped cut pieces expand radially outward. The expanded expansion section 16 then bites into the curtain wall block 2 (the front face shell section 5a) and is fixed thereto.

[0033] The fixed female screw portion 22 is formed on the tail end side of the anchor body 11 connected to the expansion portion 16, and has a depth that allows approximately half of the fixing screw member 12 to be screwed into it. Although details will be described later, approximately half of the fixing screw member 12 on the tip side is screwed deeply into the fixed female screw portion 22. Specifically, the tip of the fixing screw member 12 hits the bottom of the fixed female screw portion 22 and is screwed into a state where it cannot rotate. In other words, the fixing screw member 12 is screwed into the anchor body 11, and the expansion cone 13 is screwed into this screwed and fixed fixing screw member 12.

[0034] The fixing screw member 12 is a so-called full thread, and has an overall length that is the length of the fixed female thread portion 22 plus approximately half the length of the expansion cone 13. The fixing screw member 12 in the embodiment is a male screw with a nominal diameter of M4, and the anchor body 11 and the expansion cone 13 that form the M4 female thread (fixed female thread portion 22) are formed with an outer diameter of 6 mm.

[0035] 3 and 5, the expansion cone 13 is generally cylindrical and has the same diameter as the anchor body 11. The expansion cone 13 has a length that is half the thickness of the front face shell portion 5a plus the depth of the gap region 9. This allows the expansion cone 13 to accommodate variations in the depth of the gap region 9 and the thickness of the stone 4 in relation to the length of the fixing screw member 12.

[0036] The expansion cone 13 has a tapered portion 17 formed at the tip, a jig hook portion 24 formed at the tail end, and a continuous female thread portion 25 formed continuously in the axial direction on the inside. The tapered portion 17 is formed in a tapered shape that tapers toward the tip in order to expand the expansion portion 16 of the anchor body 11. As will be described in detail later, when the expansion cone 13 is advanced through the fixing screw member 12 in the pilot hole 8, the tapered portion 17 fits into the expansion portion 16 and expands it radially outward.

[0037] The jig hook 24 is formed by making a shallow cut in the shape of a line in the tail end of the cylindrically formed expansion cone 13 (see FIG. 5(a)). Meanwhile, the driving jig 26, the tip of which engages with the jig hook 24, has a jig head 28 that engages with the jig hook 24 and a shaft 29 connected to the jig head 28 (see FIG. 5(b) and FIG. 8(c)). The jig head 28 is composed of a cylindrical portion 28a and a pair of protrusions 28b, and the cylindrical portion 28a fits into the small end of the tail end of the expansion cone 13, and the pair of protrusions 28b engage with the shallow cut in the shape of a line. As will be described in detail later, the driving jig 26 is set in an electric drill, and the jig head 28 is engaged with the jig hook 24 and rotated, so that the expansion cone 13 advances toward the anchor body 11 and the expansion portion 16 is expanded.

[0038] Approximately half of the continuous female thread portion 25 on the tip side is the region where the fixing screw member 12 screws in, and approximately half of the continuous female thread portion 25 on the tail side is the region where the pressure screw member 14 screws in (see FIG. 2). The continuous female thread portion 25 is configured with an M4 female thread like the fixed female thread portion 22, and the pressure screw member 14 is configured with an M4 male thread like the fixing screw member 12. The fixing screw member 12, the fixed female thread portion 22 of the anchor body 11, and the continuous female thread portion 25 of the expansion cone 13 form the "screw mechanism" referred to in the claims.

[0039] Also, the fixing screw member 12 may be screwed and fixed not to the fixed female screw portion 22 of the anchor body 11 but to the continuous female screw portion 25 of the expansion cone 13. In such a case, the continuous female screw portion 25 is structured so as to be discontinuous in the middle in the axial direction, and the expansion cone 13 with the fixing screw member 12 is screwed to the anchor body 11 which is abutted against the hole bottom 8a of the pilot hole 8.

[0040] As shown in Figures 2 and 3, the cap screw 14 has a dish-shaped head 18 and a shaft 31 that screws into the tail end of the expansion cone 13 (continuous female thread 25), and has the basic shape of a so-called flat head screw. The surface of the head 18 is flat without a driver groove (tool groove) and is colored the same color as the surface of the stone 4. As will be described in detail later, the opening 8b of the pilot hole 8 is chamfered to fit the dish-shaped head 18, and when the cap screw 14 is screwed into the expansion cone 13, the head 18 fits into the opening 8b, and the surface of the head 18 and the surface of the stone 4 become flush (see Figure 2). As a result, the head 18 of the cap screw 14 blends in with the stone 4 and is extremely inconspicuous.

[0041] In this case, the screwing jig 35 into which the cap screw 14 is screwed is a jig specifically designed for this type of screw that has no tool grooves on its surface, and has an output rod 36 that is attached to an electric drill, a contact head 37 attached to the tip of the output rod 36, and a handling part 38 that rotatably supports the output rod 36 (see FIG. 8(d)). The contact head 37 is pressed against the head 18 of the cap screw 14 to rotate the output rod 36, thereby screwing the cap screw 14 into the expansion cone 13.

[0042] [Variations] Here, an expansion cone body according to a modified example will be described with reference to Fig. 6. The expansion cone body 40 of this modified example has a form in which the expansion cone 13 and the fixing screw member 12 are integrated. That is, the expansion cone body 40 is integrally formed with the expansion cone 13 and the cone male screw part 41 that extends beyond the tapered part 17 to the tip side of the expansion cone 13 and screws into the tail end side of the anchor body 11. When the expansion cone body 40 is screwed into the anchor body 11 (the fixed female screw part 22) that is abutted against the hole bottom 8a of the pilot hole 8, the tapered part 17 of the expansion cone 13 comes into contact with the expansion part 16 of the anchor body 11, expanding the expansion part 16.

[0043] In this case, the "screw mechanism" referred to in the claims is constituted by the cone male thread portion 41 of the expansion cone body 40 and the fixed female thread portion 22 of the anchor body 11. Although not shown, instead of the expansion cone body 40, the anchor body 11 may be integrally formed with a body male thread portion that extends beyond the expansion portion 16 toward the tail end side of the anchor body 11 and into which the tip side of the expansion cone 13 screws.

[0044] [Pinning method] Next, a pinning method using the anchor pin 10 will be described with reference to Figures 7 and 8. This pinning method includes a drilling step (Figure 7(a)) of drilling pilot holes 8 through the stone 4 to a predetermined depth in the curtain wall block 2 in the gap area 9 separated from the adhesive material 3, a mounting step (Figure 7(b)) of mounting the anchor body 11 to which the fixing screw member 12 has been screwed and fixed in advance so that it abuts against the bottom 8a of the pilot hole 8, a fixing step (Figure 8(c)) of screwing and tightening the expansion cone 13 inserted into the pilot hole 8 onto the fixing screw member 12 to expand the expansion part 16 of the anchor body 11, and a pressing step (Figure 8(d)) of screwing the press screw member 14 into the expansion cone 13 so as to press the stone 4.

[0045] In the drilling process, a drilling device 45 is used to drill pilot holes 8 (see FIG. 7(a)). The drilling device 45 is configured, for example, by attaching a diamond bit 46 to an electric drill (not shown). The diamond bit 46 is aimed at the marking location on the stone 4, and the diamond bit 46 is rotated by the electric drill to perform drilling. The drilling is performed so that the pilot holes 8 penetrate the stone 4 and reach the inner surface of the face shell portion 5b on the back side of the curtain wall block 2. As shown in the figure, when the pilot holes 8 reach the hollow portion 7 of the curtain wall block 2, they penetrate the stone 4 and the face shell portion 5a on the front side.

[0046] After drilling the pilot hole 8 in this manner, a spherical grinding hit (not shown) is used to chamfer the opening 8b of the pilot hole 8 (see FIG. 7(b)). This chamfering ensures that when the cap screw 14 is later screwed in, the surface of its head 18 will be flush with the surface of the stone 4, making it extremely inconspicuous.

[0047] In the installation process, the fixing screw member 12 is screwed into the anchor body 11 in advance (screwed and fixed), and the anchor body 11 with the fixing screw member 12 is installed in the pilot hole 8. In this case, the tip of the anchor body 11 is made to abut against the inner surface (bottom 8a of the pilot hole 8) of the face shell portion 5b on the back side of the curtain wall block 2 (FIG. 7(b)). However, when the expansion cone 13 is inserted into the pilot hole 8 in the subsequent fixing process, the previously inserted anchor body 11 may be pushed in and abutted against the inner surface.

[0048] In the fixing process, the expansion cone 13 is lightly screwed onto the anchor body 11 that is abutted against the bottom 8a of the pilot hole 8, and then the driving jig 26 set on the electric drill is rotated to tighten the expansion cone 13 (FIG. 8(c)). In this case, the expansion cone 13 is tightened with a torque value that ensures that the expansion portion 16 of the anchor body 11 expands. As a result, the tapered portion 17 of the expansion cone 13 pushes the expansion portion 16 of the anchor body 11 outward in the radial direction, and the expansion portion 16 bites into the curtain wall block 2 (face shell portion 5a). As a result, the anchor body 11 and the expansion cone 13 are fixed to the curtain wall block 2.

[0049] In the pressing process, the press screw 14 is screwed through the stone 4 into the expansion cone 13 fixed to the curtain wall block 2. In this case, too, the screwing jig 35 set on the electric drill is rotated with a specified torque to tighten the press screw 14 (Fig. 8(d)). This causes the head 18 of the press screw 14 to fit into the opening 8b, and the surface of the head 18 becomes flush with the surface of the stone 4. At the same time, the stone 4 is fixed (anchored) to the curtain wall block 2 by the head 18 of the press screw 14 via the press screw 14 and the expansion cone 13.

[0050] As described above, according to this embodiment, when the expansion cone 13 is screwed into the anchor body 11 via the fixing screw member 12, the tapered portion 17 of the expansion cone 13 expands the expansion portion 16 of the anchor body 11, and the anchor body 11 and the expansion cone 13 are fixed to the curtain wall block 2 with sufficient pull-out strength. Next, when the pressure screw member 14 is screwed into the expansion cone 13, the head 18 of the pressure screw member 14 presses the stone 4, and the stone 4 is firmly fixed to the expansion cone 13. In this way, the stone 4 that has "floated" or the like can be mechanically fixed to the curtain wall block 2 via the anchor pin 10. In other words, the wall 1 in which the stone 4 is attached to the curtain wall block 2 can be appropriately repaired without using adhesive.

[0051] In addition, since the expansion portion 16 of the anchor body 11 is designed to expand within the thickness of the face shell portion 5a of the curtain wall block 2, the stone 4 can be properly fixed to the curtain wall block 2 even if the curtain wall block 2 has a hollow structure.

[0052] In this embodiment, a concrete block (curtain wall block 2) has been used as an example of a curtain wall material, but the present invention is also applicable to walls based on curtain wall materials such as extruded cement boards, calcium silicate boards, and ALC boards. [Explanation of symbols]

[0053] 1...wall body, 2...curtain wall block, 3...attaching material, 4...stone material, 5a, 5b...face shell portion, 8...pilot hole, 8a...hole bottom, 9...void area, 10...anchor pin, 11...anchor body, 12...fixing screw member, 13...expansion cone, 14...pressing screw member, 16...expansion portion, 17...tapered portion, 18...head, 21...stopping portion, 22...fixed female screw portion, 25...continuous female screw portion, 31...shaft portion, 40...expansion cone body, 41...cone male screw portion

Claims

1. An anchor pin is used in a pinning method for repairing a wall in which a finishing material is attached to a curtain wall material, and is inserted into a pilot hole drilled in the curtain wall material through the finishing material, an anchor body having an expanded portion at a tail end and a tip end abutted against the bottom of the pilot hole; an expansion cone that advances relative to the anchor body to expand the expansion portion by a tapered portion formed at a tip portion; a screw mechanism interposed between the anchor body and the expansion cone for converting rotation of the expansion cone relative to the anchor body into forward movement; An anchor pin characterized by comprising: a head portion for holding the finishing material; and a press screw member whose shaft portion screws into the tail end side of the expansion cone.

2. the screw mechanism has a fixing screw member, the tip side of which is approximately half screwed into the tail end side of the anchor body, and the tail end side of which is approximately half screwed into the tip side of the expansion cone, 2. The anchor pin according to claim 1, wherein the fixing screw member is non-rotatably screwed to either one of the anchor body or the expansion cone.

3. 2. The anchor pin according to claim 1, wherein the screw mechanism has either a body male thread portion that extends beyond the expansion portion toward the tail end of the anchor body and screws onto the tip end of the expansion cone, or a cone male thread portion that extends beyond the tapered portion toward the tip end of the expansion cone and screws onto the tail end of the anchor body.

4. 4. The anchor pin according to claim 1, wherein the anchor body has a rotation preventing portion at a tip end thereof for preventing rotation against a bottom of the prepared hole.

5. 5. The anchor pin according to claim 4, wherein the anti-rotation portion has a tip that abuts against the bottom of the prepared hole and is formed in a straight line.

6. The curtain wall material has a hollow structure defined by two face shell parts on the front and back and a plurality of web parts extending between the two face shell parts, The pilot hole penetrates the finishing material and the face shell portion on the front side, and has an inner surface of the face shell portion on the back side as a hole bottom, The anchor pin according to any one of claims 1 to 5, characterized in that the anchor body has a length such that, when the tip of the anchor body is abutted against the bottom of the hole, the expansion portion is positioned within the thickness of the face shell portion on the front side.

7. 7. An anchor pin according to claim 1, wherein the finishing material is one of a stone material and a large tile.

8. Using the anchor pin according to any one of claims 1 to 7, A pinning method for repairing a wall to which a finishing material is attached via adhesive materials scattered on a curtain wall material, comprising the steps of: a drilling step of drilling pilot holes through the finishing material to a predetermined depth in the blanking material in the gap area separated from the adhesive material; a mounting step of mounting the anchor body in the pilot hole so that a tip end of the anchor body abuts against a bottom of the pilot hole; a fixing step of expanding the expansion portion of the anchor body via the screw mechanism by the expansion cone inserted into the pilot hole; a pressing step of screwing the press screw member into the expansion cone while pressing down the finishing material.

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