JP7297290B2 - Anchor pin for pinning method and pinning method - Google Patents

Description

TECHNICAL FIELD The present invention relates to an anchor pin for a pinning method and a pinning method used for repairing wall bodies such as outer walls and inner walls having a so-called "float".

Conventionally, as an anchor pin for this type of pinning method, there is known an anchor pin for exterior wall repair that is driven into a construction hole into which an adhesive is injected (see Patent Document 1).
This anchor pin consists of a pin main body having a tip expanded portion at its tip, an expansion cone attached to the tip of the tip expanded portion and expanding the tip expanded portion, and a base end serving as the head of a countersunk screw. a shaft body having an enlarged diameter portion, the shaft portion being driven into the pin main body. An uneven internal tooth is formed on the inner peripheral surface of the pipe, which mainly consists of the pin except for the tip expanding portion, while an uneven external tooth is formed on the shaft of the shaft body corresponding to the uneven internal tooth. It is
In this method of repairing an outer wall using an anchor pin, first, the distal end of the shaft is inserted into the proximal end of the pin body, and the expansion cone is attached to the distal end of the pin body to assemble the anchor pin. The anchor pin is then inserted into the drilled hole so that the flared cone reaches the bottom of the drilled hole. Here, the shaft of the anchor pin protruding from the outer wall finishing material layer is hit. By this tapping, the shaft enters into the pin main body, and the pin main body itself advances toward the depth of the construction hole, and the tip expanding portion expands so as to ride on the expansion cone. Further, hammering is continued, and the construction work is completed when the enlarged base end portion of the shaft becomes flush with the surface of the outer wall finishing material layer.

JP-A-2005-23550

In such a conventional anchor pin for repairing an outer wall, it is necessary to accurately form the concave-convex internal tooth body of the pin and the concave-convex external tooth body of the shaft body in terms of "fitting". For example, if the "fit" is loose, the entry of the shaft takes precedence over the main body of the pin when striking, and the expanded base end portion of the shaft reaches the outer wall finishing material layer without expanding the expanded tip end portion. There is a risk of Conversely, if the "fit" is too tight, it is necessary to hit the shaft strongly after the expanded tip portion expands, and there is a risk that the outer wall finishing material layer will be hit and damaged in the final stage of hitting. There is
Also, if the pin main body is not formed thick, there is a problem that the pin main body deforms before the tip expanding portion rides on the expansion cone when struck, and the tip expanding portion does not expand properly.

An object of the present invention is to provide an anchor pin for a pinning method and a pinning method that can reliably and appropriately expand the expanded portion of the anchor body and effectively prevent damage to the finishing material. It is an issue.

The anchor pin for the pinning method of the present invention is an anchor pin for the pinning method that penetrates the finishing material and drills the concrete frame to a predetermined depth and is fixed to the prepared hole whose opening is chamfered. , an anchor body having a widened portion at the tip and a female thread formed on the inner peripheral surface, a cone portion that widens the widened portion by being driven from the opening side, and fitted into the opening. and a presser screw portion having a countersunk head and a male screw formed on the outer peripheral surface of the shaft portion corresponding to the female screw. It is characterized in that it is formed somewhat longer than the length of the hole drilled in the concrete skeleton, and the holding screw portion is screwed into the anchor body into which the cone portion is driven.

According to this configuration, the cone portion is driven into the hole with the anchor body and the cone portion inserted into the pilot hole, so that the expanded portion of the anchor body expands and the anchor body is fixed in the pilot hole. In this state, the presser screw is screwed into the anchor body so that the head fits into the opening of the prepared hole. In this case, since the anchor body is fixed in the prepared hole by directly driving the cone portion, the driving force does not directly act on the anchor body. Can be expanded properly. In addition, since the pressing screw portion is screwed into the fixed anchor body, there is no need to drive the anchor, and damage to the finishing material can be effectively prevented. Moreover, since the head of the retaining screw threaded into the anchor body is fitted into the chamfered opening, it is possible to appropriately retain the finishing material around the opening without impairing its strength.
In addition, it is preferable that the holding screw portion is screwed into the anchor body so that the surface of the head thereof is flush with the surface of the finishing material. Further, if an adhesive is injected into the pilot hole, or if the adhesive is injected after driving the cone portion, the finishing material is fixed to the concrete frame by the adhesive injected into the pilot hole and anchors. It is mechanically fixed by the main body and the holding screw.

In this case, an expansion collar attached to the inner peripheral surface of the expansion part and having an axial slit part is further provided, and the expansion part is expanded through the expansion collar expanded by the hammered cone part. preferably.

With this configuration, the expanded portion of the anchor body can be reliably expanded by at least the thickness of the expansion collar. Further, the driving force in the axial direction is offset by the contact of the tip of the expansion collar with the bottom of the prepared hole, and only the expanding force in the radial direction is transmitted to the expanding portion. Therefore, the expanding portion can be expanded efficiently.

Moreover, the surface of the head is preferably colored in the same color as the surface of the finishing material.

According to this configuration, when the cap screw is screwed into the anchor body so that the surface of the cap screw is flush with the surface of the finishing material, the head of the cap screw can be made inconspicuous. It can be done and does not impair the design of the finishing material. In addition, since the presser screw portion is screwed together, damage to the coating caused by hammering unlike the prior art does not occur.

The pinning method of the present invention is a pinning method for repairing a wall made of a finishing material and a concrete frame using the anchor pin for the pinning method described above, and drilling a pilot hole in a portion of the wall that needs to be repaired. a chamfering step of chamfering the opening of the pilot hole to fit the head of the holding screw; an insertion step of inserting the anchor body and the cone into the pilot hole; a driving step of expanding the expanded portion of the anchor body; an injection step of injecting the adhesive into the pilot hole; and a screwing step of screwing the holding screw portion into the anchor body into which the cone portion has been driven. and

According to this configuration, since the cone portion is directly driven to fix the anchor body in the pilot hole, the expanding portion of the anchor body can be reliably and appropriately expanded. Moreover, since the holding screw portion is screwed into the fixed anchor body, there is no need to drive the holding screw portion, and damage to the finishing material can be effectively prevented. Moreover, since the head of the threaded cap screw portion is fitted into the chamfered opening, the finish material around the opening can be properly held without impairing the strength thereof.
On the other hand, the injection step may be performed between the chamfering step and the inserting step, but is more preferably performed between the driving step and the screwing step. When the adhesive is injected into the pilot hole, the pilot hole can be filled with the adhesive as well as the "floats".
As a result, the finishing material is fixed to the concrete frame by the adhesive injected into the pilot hole, and mechanically fixed by the anchor body and the set screw.
In screwing the cap screw portion, if the surface of the cap screw is flush with the surface of the finishing material, the cap screw portion exposed to the outside can be made inconspicuous.

FIG. 4 is a cross-sectional view of the anchor pin according to the first embodiment in an installed state; 1 is an exploded view of an anchor pin according to a first embodiment; FIG. It is sectional drawing (a) before driving in the anchor main body of the anchor pin which concerns on 1st Embodiment, and sectional drawing (b) after driving. It is structural drawing (a) of the anchor main body based on the 1st modified example of 1st Embodiment, and structural drawing (b) of the anchor main body based on the 2nd modified example. It is a structural diagram of a screwing jig according to the first embodiment. It is a structural drawing of the screwing jig which concerns on 2nd Embodiment. It is explanatory drawing (1) of a pinning method, Comprising: The figure (a) showing the construction procedure 1, the figure (b) showing the construction procedure 2, and the figure (c) showing the construction procedure 3. FIG. It is explanatory drawing (2) of a pinning method, Comprising: It is the figure (d) showing the construction procedure 4, the figure (e) showing the construction procedure 5, and the figure (f) showing the construction procedure 6. FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An anchor pin for a pinning method (hereinafter simply referred to as an "anchor pin"), a pinning method, and a screwing jig used therefor according to an embodiment of the present invention will now be described with reference to the accompanying drawings. This pinning method (anchor pinning method) repairs walls such as the outer walls of existing buildings and the inner walls of atriums and halls that have so-called floats. In the embodiment, an anchor pin is driven into a prepared hole drilled in a repair-required portion (floating portion) of the outer wall and an adhesive is injected, and the finishing material is fixed to the concrete frame with the adhesive and mechanically. I'm trying to repair it.

[Anchor pin]
FIG. 1 is a cross-sectional view showing a construction state of an anchor pin according to an embodiment, and FIG. 2 is an exploded view of the anchor pin. As shown in FIG. 1, an existing outer wall 1 is composed of a concrete frame 2 and a finishing material 3, and the finishing material 3 is composed of a base mortar 4, a covering mortar 5, and a tile 6 as a decorative material. In this case, the decorative material may be a stone or the like, and the mortar may be only the sticking mortar 5 or three or more layers.

Here, it is assumed that a first floating portion 7 is formed between the concrete frame 2 and the base mortar 4 and a second floating portion 8 is formed between the mortar 5 and the tiles 6 . In order to repair the outer wall 1, a prepared hole 10 is formed through the tile 6, the mortar 5 and the base mortar 4 and drilling the concrete frame 2 to a predetermined depth. An anchor pin 20 is driven into the pilot hole 10 so as to press the finishing material 3, and an adhesive R is injected. Also, the adhesive R is injected so as to fill the first floating portion 7 and the second floating portion 8 .

The pilot hole 10 is drilled through the finishing material 3 to a depth of about 30 mm with respect to the concrete frame 2 . Further, the opening 10a of the pilot hole 10 is chamfered to receive the head of the anchor pin 20 (the head 26 of the cap screw portion 25, which will be described later). As the adhesive R, cement slurry or resin adhesive (for example, epoxy resin adhesive) is used.

As shown in FIGS. 1 and 2, the anchor pin 20 has a widened portion 22 on the distal end side, a cylindrical anchor body 21 anchored in the prepared hole 10, and a cylindrical anchor body 21 that is driven from the opening 10a side. , a cone portion 23 for expanding the expansion portion 22 , an expansion collar 24 interposed between the expansion portion 22 and the cone portion 23 , and a dish-shaped head portion 26 , which is screwed to the anchor body 21 . and a holding screw portion 25 that mates.

By driving the cone portion 23 while the anchor body 21 is inserted into the pilot hole 10 , the expanded portion 22 is pushed out through the expansion collar 24 , and the anchor body 21 is anchored (fixed) in the pilot hole 10 . be. By screwing the holding screw portion 25 into the anchor body 21 in this state, the finishing material 3 is fixed to the concrete skeleton 2 via the anchor 20 .

The anchor main body 21 has a tubular main body tubular portion 31 and an enlarged portion 22 connected to the tip of the main tubular portion 31, and is integrally formed of stainless steel, steel, or the like. The main tubular portion 31 and the widening portion 22 are formed to have the same diameter, and are formed to be smaller than the diameter of the pilot hole 10 by about 1 mm. The length of the anchor body 21 is formed to be somewhat longer than the length of the drilled portion of the concrete frame 2 of the pilot hole 10, and the holding screw portion 25 has a different length so as to correspond to the thickness of the finishing material 3. While a plurality of types are prepared, the anchor body 21 is commonly used.

A female screw 31a with which the press screw portion 25 is screwed is formed on the inner peripheral surface of the main body tubular portion 31 . On the other hand, the expanded portion 22 is formed with a plurality of (two in the embodiment) split slits 33 axially cut from the tip. The two split slits 33 are arranged at 180° symmetrical positions in the circumferential direction, and allow the expansion portion 22 to expand radially outward. Note that the number of split slits 33 is arbitrary. Further, the expanding portion 22 may be formed in an uneven shape having a plurality of constricted portions in the axial direction.

The cone portion 23 is made of stainless steel, steel, or the like and has a tapered shape. The tip portion of the cone portion 23 is fitted into the base end portion of the expansion collar 24 , and in this state, the cone portion 23 and the expansion collar 24 are attached to the expansion portion 22 . When the cone portion 23 is driven from the opening 10a side, the expansion collar 24 expands, and the expansion collar 24 expands to expand the expansion portion 22 (see FIG. 3B).

The expansion collar 24 is formed in a cylindrical shape from stainless steel, steel, or the like, and has a plurality of (two in the embodiment) slit portions 35 cut from the cone portion 23 side. The two slit portions 35 are arranged at 180° symmetrical positions in the circumferential direction, and allow the expansion collar 24 to expand radially outward. Each slit portion 35 extends in the axial direction from the base end side to approximately ⅔ of the entire length. Further, the expansion collar 24 is formed to have a dimension shorter than that of the expanded portion 22 in the axial direction, and is mounted so as to be fitted (attached) to the expanded portion 22 . The number and length of the slit portions 35 in this case are also arbitrary.

As shown in FIG. 3, the anchor body 21 with the cone portion 23 and the expansion collar 24 attached to the expansion portion 22 is inserted so that the tip thereof abuts against the hole bottom 10b of the pilot hole 10 (FIG. 3(a)). )reference). When the cone portion 23 is driven in this state, the expansion collar 24 expands, and the expanding portion 22 expands due to the expanded expansion collar 24 (see FIG. 3(b)).

It is preferable that the cone portion 23 is attached to the expansion collar 24 by being fitted into the expansion collar 24 or by being weakly adhered in this state. Further, it is preferable that the expansion collar 24 is attached to the expansion portion 22 by being fitted into the expansion portion 22 or by weak adhesion in this state.

The holding screw portion 25 has a basic form of a so-called countersunk screw, and is made of stainless steel, steel, or the like. That is, the holding screw portion 25 has a dish-shaped head portion 26 that fits into the chamfered opening portion 10a, and has a male thread 41a on the outer peripheral surface of the shaft portion 41 corresponding to the female thread 31a of the anchor body 21. are doing. The surface 26a of the head 26 is a flat surface without grooves for a driver, and is colored in the same color as the surface of the finishing material 3. As shown in FIG. That is, the surface 26a of the head 26 is baked in the same color as the tile 6. As shown in FIG. As described above, the holding screw portion 25 is prepared in a plurality of types with different lengths so as to correspond to the thickness of the finishing material 3 for each site.

The holding screw portion 25 is screwed into the anchor body 21 into which the cone portion 23 is driven from the side of the opening 10a of the pilot hole 10. The screwing of the holding screw portion 25 is performed by screwing jigs 50A and 50B, which will be described later. is done using When the cap screw portion 25 is screwed into the anchor body 21 by the screw jigs 50A and 50B, the head portion 26 of the cap screw portion 25 is fitted into the chamfered opening portion 10a, and the surface 26a of the head portion 26 and the tile 6 are engaged. becomes flush with the surface of As a result, the head portion 26 of the retaining screw portion 25 is assimilated with the tile 6 and becomes extremely inconspicuous.

[Modification]
Here, an anchor body 21A according to a first modified example will be described with reference to FIG. 4(a), and an anchor body 21B according to a second modified example will be described with reference to FIG. 4(b). The anchor bodies 21A and 21B of these modified examples do not have the expanding collar 24 as described above, and the expanding portion 22 thereof is directly expanded by the cone portion 23. As shown in FIG.

As shown in FIG. 4(a), the anchor body 21A according to the first modified example is radially constricted at a plurality of locations (three locations in the embodiment) in the expanded portion 22 in the circumferential direction. It has a constricted portion 45 formed thereon. The three narrowed portions 45 that are concave inward are evenly arranged in the circumferential direction, and the cone portion 22 contacts the inner surfaces of the three narrowed portions 45 to expand the widening portion 22 . Also in this case, the number of diaphragm portions 45 is arbitrary.

As shown in FIG. 4B, an expansion ring 48 is fitted to the outer peripheral surface of the expanded portion 22 of the anchor main body 21B according to the second modification. In this case, the expansion ring 48 is mounted so as to be fitted into the expanded portion 22 whose distal end side is narrowed by the split slit 33 . A notch 48 a is provided at one location in the circumferential direction of the expansion ring 48 , and the cone portion 23 contacts the inner peripheral surface of the expanded portion 22 to expand the expanded portion 22 and the expansion ring 48 .

[Screw jig]
Next, a screwing jig 50A of the first embodiment will be described with reference to FIG. 5, and a screwing jig 50B of the second embodiment will be described with reference to FIG. These screwing jigs 50A and 50B are: It is used by being attached to an electric drill (not shown). It is screwed into the anchor body 21 .

As shown in FIG. 5, the screwing jig 50A of the first embodiment includes an output rod portion 51 attached to the chuck portion of the electric drill, and attached to the tip of the output rod portion 51. a contact pad portion 52 that comes into contact with the portion 26 and transmits the rotation of the electric drill to the holding screw portion 25; It has Each component except for the contact pad portion 52 is made of stainless steel, steel, or the like.

The output rod portion 51 includes a mounting portion 55 to be mounted on an electric drill, a rod portion main body 56 whose base end side is screwed to the mounting portion 55, a pad mounting portion 57 connected to the tip of the rod portion main body 56, have. The rod portion main body 56 and the pad mounting portion 57 are integrally formed, and the pad mounting portion 57 is formed to have a larger diameter than the rod portion main body 56 . The contact pad portion 52 is coaxially attached to the end face of the pad attachment portion 57 on the tip end side by adhesion or the like. Note that the pad mounting portion 57 is formed to have a diameter slightly larger than that of the contact pad portion 52 .

The contact pad portion 52 is a portion that comes into direct contact with the head portion 26 of the retaining screw portion 25, and is made of rubber or the like. Further, the contact pad portion 52 is formed to have a larger diameter than the head portion 26 of the retaining screw portion 25 . As the cap screw portion 25 is screwed in, the head portion 26 is fitted into the opening portion 10a. At the final stage of this screwing, the contact pad portion 52 formed with a diameter larger than that of the head portion 26 abuts the surface of the finishing material 3 (tile 6) at its periphery. That is, when the surface 26a of the head 26 becomes flush with the surface of the tile 6, screwing of the retaining screw portion 25 is automatically restricted.

The hand-held portion 53 is a portion for supporting the output rod portion 51 with the other hand of the operator holding the electric drill, and is configured to be relatively rotatable and advance/retreat with respect to the output rod portion 51 . The hand-held portion 53 is formed integrally with a hand-held portion main body 61 on the mounted portion 55 side and a receiving guide portion 62 on the contact pad portion 52 side extending from the hand-held portion main body 61 .

The hand-held portion main body 61 is formed to have a diameter sufficiently larger than that of the receiving guide portion 62, and a through hole 63 through which the rod portion main body 56 penetrates is formed in the axial center thereof. A part of the through hole 63 is provided with a bearing portion 63a for supporting the rod main body 56. As shown in FIG. The receiving guide portion 62 is formed in a cylindrical shape, and its inner diameter is formed to be the same as the outer diameter of the pad mounting portion 57 . That is, the output rod portion 51 is rotatably and forwardly/retractably supported by the hand-held portion 53 at two points, the inner peripheral surface of the receiving guide portion 62 corresponding to the pad mounting portion 57 and the bearing portion 63a.

In this case, when the hand-holding portion 53 is moved forward, the tip side of the receiving guide portion 62 surrounds the contact pad portion 52 and can receive the head portion 26 of the pressing screw portion 25 . Further, the contact pad portion 52 protrudes from the tip of the receiving guide portion 62 when the hand-held portion 53 is retracted.

Although the details will be described later, when screwing the cap screw portion 25, the hand-held portion 53 is advanced to receive the head portion 26 of the cap screw portion 25, and the tip of the receiving guide portion 62 is tiled. Let it hit the surface of 6. In this state, the output rod portion 51 is rotated, and the holding screw portion 25 is screwed in while the receiving guide portion 62 is relatively retracted. When the head 26 of the cap screw portion 25 becomes flush with the surface of the tile 6, the cap screw portion 25 cannot be screwed in, so the work is finished here.

As shown in FIG. 6 , the screwing jig 50B of the second embodiment includes an output rod portion 71 attached to an electric drill, and an output rod portion 71 attached to the tip of the output rod portion 71 and attached to the head portion 26 of the press screw portion 25. A contact pad portion 72 that contacts and transmits the rotation of the electric drill to the holding screw portion 25, and a receiving guide portion that is provided at the distal end portion of the output rod portion 71 and configured to be axially movable with respect to the output rod portion 71. and a spring 74 that extends between the receiving guide portion 73 and the base side of the output rod portion 71 and biases the receiving guide portion 73 forward. Also in this case, each component except for the contact pad portion 72 is made of stainless steel, steel, or the like.

The output rod portion 71 includes a mounted portion 75 to be mounted on the chuck portion of the electric drill, a spring receiving portion 76 connected to the distal end side of the mounted portion 75 and receiving the spring 74, and a spring receiving portion extending to the base end side. It has a rod portion main body 77 screwed to 76 and a pad attachment portion 78 continuing to the tip of the rod portion main body 77 . The mounting portion 75 and the spring receiving portion 76 are integrally formed, and the spring receiving portion 76 is formed to have a larger diameter than the mounting portion 75 . Similarly, the rod portion main body 77 and the pad mounting portion 78 are integrally formed, and the pad mounting portion 78 is formed to have a larger diameter than the rod portion main body 77 . In this case as well, the contact pad portion 72 is attached to the end face of the tip side of the pad attachment portion 78 by adhesion or the like, and the pad attachment portion 78 has a diameter slightly larger than that of the contact pad portion 72. formed.

The contact pad portion 72 is made of rubber or the like in the same manner as described above, and is formed to have a larger diameter than the head portion 26 of the retaining screw portion 25 . In the advanced state, the receiving guide portion 73 is connected to a guide portion main body 81 that surrounds the contact pad portion 72 and can receive the head portion 26 of the pressing screw portion 25, and the base end side of the guide portion main body 81. It is integrally formed with a spring contact portion 82 with which 74 contacts. The inner diameter of the guide portion main body 81 is formed to be the same as the outer diameter of the pad mounting portion 78 , while the inner diameter of the spring contact portion 82 is formed to be the same as the outer diameter of the rod portion main body 77 .

An annular stepped portion 83 that serves as a boundary between the inner peripheral portion of the guide portion main body 81 and the inner peripheral portion of the spring contact portion 82 is in contact with the base end of the pad mounting portion 78 . The spring 74 abuts the annular stepped portion 83 against the pad mounting portion 78 and restricts the position thereof to the forward end position of the receiving guide portion 73. In this state, the receiving guide portion 73 (the main body of the guide portion) 81) protrudes from the contact pad portion 72 and is capable of receiving the head portion 26 of the cap screw portion 25. As shown in FIG. From this state, when the receiving guide portion 73 is abutted against the surface of the tile 6 and the output rod portion 71 is advanced against the spring 74, the contact pad portion 72 is advanced.

Although the details will be described later, also in this case, when screwing the cap screw portion 25, the head portion 26 of the cap screw portion 25 is first received, and the tip of the receiving guide portion 73 is thrust into the surface of the tile 6. make sure to guess In this state, the output rod portion 71 is rotated, and the holding screw portion 25 is screwed in while the receiving guide portion 73 is relatively retracted. When the head 26 of the cap screw portion 25 becomes flush with the surface of the tile 6, the cap screw portion 25 cannot be screwed in, so the work is finished here.

In these embodiments, the contact pad portions 52 and 72 are formed to have a diameter larger than the head portion 26 of the holding screw portion 25 so that the surface of the head portion 26 is flush with the surface of the tile 6 during screwing. I'm trying to be In this regard, the retraction end positions of the receiving guide portions 62 and 73 can be restricted when the leading end surfaces of the pad mounting portions 57 and 78 and the leading end surfaces of the receiving guide portions 62 and 73 are flush with each other. , it is possible to make the surface of the head 26 flush with the surface of the tile 6 during screwing in the same manner as described above.

[Pinning method]
Next, a pinning method using the anchor pin 20 will be described with reference to FIGS. 7 and 8. FIG.
This pinning method consists of a drilling step (FIG. 7(a)) of drilling a prepared hole 10 in a portion of the outer wall 1 requiring repair, and an opening of the prepared hole 10 so that the head 26 of the retaining screw portion 25 is fitted. A chamfering step of chamfering the portion 10a (FIG. 7B), an inserting step of inserting the anchor body 21, the cone portion 23 and the expansion collar 24 into the prepared hole 10 (FIG. 7C), and the cone portion 23 A driving step (FIG. 8(d)) for driving and expanding the expanded portion 22 of the anchor body 21, an injection step (FIG. 7(e)) for injecting the adhesive R into the pilot hole 10, and a cone portion. and a screwing step ( FIG. 8( f )) of screwing the holding screw portion 25 into the anchor body 21 into which the anchor 23 has been driven. Prior to the drilling process, the drilling position (floating portion) of the pilot hole 10 is detected by tapping the outer wall 1, and the center position of the tile 6 at the corresponding location is marked.

In the drilling step of FIG. 7( a ), a pilot hole 10 is drilled using a drilling device 91 . The drilling device 91 is constructed by attaching a diamond bit 92 to an electric drill. A diamond bit 92 is applied to the marking portion of the tile 6, and the diamond bit 92 is rotated by an electric drill to drill holes. The drilling is performed at right angles to the tiles 6 and through the finishing material 3 to reach a predetermined depth in the concrete skeleton 2 . In addition, it is preferable to supply a coolant to the diamond bit 92 in this drilling.

In the chamfering step shown in FIG. 7B, a spherical grinding bit 93 is used to chamfer the opening 10a of the pilot hole 10. As shown in FIG. In this chamfering, the opening 10a formed in the tile 6 is chamfered into a hemispherical shape. A truncated conical grinding bit may be used instead of the spherical grinding bit 93 .

In the insertion step of FIG. 7(c), the anchor body 21 with the cone portion 23 and the expansion collar 24 attached thereto is inserted so as to reach the hole bottom 10b of the pilot hole 10. As shown in FIG. In the embodiment, the anchor main body 21 is pushed into the pilot hole 10, and then, using a driving tool 96 (a driving rod) described later, the anchor main body 21 is pushed so that its tip reaches the hole bottom 10b. In this case, the anchor body 21 may be pushed in by tapping the driving tool 96 . When the anchor main body 21 is inserted into the pilot hole in this manner, the anchor main body 21 and the expansion collar 24 abut against the hole bottom 10b of the pilot hole 10 .

In the driving step of FIG. 8(d), the driving tool 96 is brought into contact with the cone portion 23 in the anchor body 21, and the driving tool 96 is struck to drive the cone portion 23 therein. When the cone portion 23 is driven, the expansion collar 24 expands from the base end side, and at the same time, the expansion portion 22 receives expansion force from the expansion collar 24 and expands outward. As a result, the expanded portion 22 bites into the peripheral wall of the pilot hole 10 (actually, is strongly pressed against it), and the anchor body 21 is anchored (fixed) in the pilot hole 10 .

In the injection step of FIG. 8(e), a manual resin injector 94 is used, and its injection nozzle 95 is inserted into the pilot hole 10 to perform pumping. In this case, pumping is performed in a state in which the tip of the injection nozzle 95 is abutted against the cone portion 23 into which the injection nozzle 95 has been injected and the opening portion 10a is sealed. By this pumping, the adhesive R ejected from the injection nozzle 95 fills the bottom hole 10 from the innermost portion, and further fills the first floating portion 7 and the second floating portion 8 . Also, the anchor body 21, the cone portion 23 and the expansion collar 24 are submerged in the adhesive R.

In the screwing step of FIG. 8( f ), first, the presser screw portion 25 is inserted into the pilot hole 10 and lightly screwed into the anchor body 21 fixed deep inside the pilot hole 10 . Specifically, the pressing screw portion 25 is screwed into the anchor main body 21 to such an extent that the shaft portion 41 is sunk into the prepared hole 10 with the head portion 26 left. Here, using a screwing jig 50A attached to an electric drill, the presser screw portion 25 is screwed into the anchor body 21 so that the head portion 26 fits into the opening portion 10a.

Specifically, the electric drill is held, the hand-held portion 53 is advanced, and the receiving guide portion 62 is applied so as to receive the head portion 26 of the cap screw portion 25 . After aiming in this manner, the output rod portion 51 is rotated and pushed (advance) to screw in the cap screw portion 25 . When the surface 26a of the head 26 becomes flush with the surface of the tile 6, the forward movement of the output rod portion 51 is restricted, and the cap screw portion 25 cannot be screwed. Needless to say, the holding screw portion 25 is screwed into the anchor body 21 to which the adhesive R is adhered. After finishing the screwing operation in this manner, the curing of the adhesive R is awaited.

In this embodiment, the step of injecting the adhesive R is performed between the driving step and the screwing step, but it may be performed between the chamfering step and the inserting step.

As described above, according to the present embodiment, since the anchor body 21 is fixed in the pilot hole 10 by directly driving the cone portion 23, the impact of driving does not directly act on the anchor body 21. While suppressing unnecessary deformation of the anchor body 21, the expansion portion 22 can be expanded reliably and appropriately. In addition, since the pressing screw portion 25 is screwed into the fixed anchor body 21, it is not necessary to drive in, and damage to the finishing material 3 (tile 6) can be effectively prevented. Moreover, since the head portion 26 of the pressing screw portion 25 screwed into the anchor body 21 is fitted into the chamfered opening portion 10a, the tile 6 around the opening portion 10a can be properly pressed without impairing the strength thereof. can be done. The finishing material 3 (tile 6) is fixed to the concrete frame 2 by the adhesive R injected into the pilot hole 10 and mechanically fixed by the anchor pin 20. As shown in FIG.

In addition, since the pressing screw portion 25 is screwed into the anchor body 21 so that the surface 26a of the head portion 26 is flush with the surface of the finishing material 3 (tile 6), the color of the fixing screw portion 25 is the same as that of the surface of the tile 6. The colored head 26 can be very discreet. Therefore, the design of the outer wall 1 is not spoiled.

REFERENCE SIGNS LIST 1 outer wall 2 concrete frame 3 finishing material 6 tile 10 pilot hole 10a opening 10b hole bottom 20 anchor pin 21, 21A, 21B anchor body 22 expansion Opening 23 Cone 24 Expanding collar 25 Pressing screw 26 Head 26a Surface 31 Cylindrical body 31a Female screw 35 Slit 41 Shaft 41a... male screw, 50A, 50B... screwing jig, 51, 71... output rod part, 52, 72... contact pad part, 53... handle part, 62, 73... reception guide part, 74... spring, R... adhesion agent

Claims (4)

An anchor pin for a pinning method that is anchored in a pilot hole in which the concrete frame is drilled to a predetermined depth by penetrating the finishing material and the opening is chamfered,
an anchor body having a widened portion at the distal end and a female thread formed on the inner peripheral surface;
a cone portion that expands the expansion portion by being driven from the opening side;
a pressing screw portion having a dish-shaped head that fits into the opening and having a male screw formed on the outer peripheral surface of the shaft portion corresponding to the female screw;
The anchor body is formed in a cylindrical shape and formed somewhat longer than the length of the portion of the pilot hole drilled in the concrete skeleton,
An anchor pin for a pinning method, wherein the holding screw portion is screwed into the anchor body into which the cone portion is driven. further comprising an expansion collar attached to the inner peripheral surface of the expansion portion and having an axial slit,
The anchor pin for pinning method according to claim 1, wherein the expanded portion is expanded through the expansion collar that is expanded by the driven cone portion. The anchor pin for pinning method according to claim 1 or 2, wherein the surface of the head is colored in the same color as the surface of the finishing material. A pinning method for repairing a wall made of the finishing material and the concrete frame using the anchor pin for the pinning method according to claim 1,
a drilling step of drilling the pilot hole in the portion requiring repair of the wall;
a chamfering step of chamfering the opening of the pilot hole in order to fit the head of the cap screw;
an inserting step of inserting the anchor main body and the cone portion into the pilot hole;
a driving step of driving the cone portion to expand the expansion portion of the anchor body;
an injection step of injecting an adhesive into the pilot hole;
and a screwing step of screwing the holding screw portion into the anchor body into which the cone portion is driven.

Images