JP2007092433A - Expansion anchor for pinning construction method and pinning construction method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expansion anchor for a pinning construction method and the pinning construction method, capable of surely anchoring the expansion anchor in a skeleton by an adhesive. <P>SOLUTION: This expansion anchor 10 is provided for driving a concrete skeleton 2 in an inserting filling hole 8 bored up to the predetermined depth by penetrating through a finishing material 3, and has the cylindrical anchor 11 having a cylindrical body 21 and an expansively opening anchor part 22 and inserted and filled in the inserting filling hole 8 and a driving pin 12 fitted in the cylindrical anchor 11 and push-opening the expansively opening anchor part 22 by being driven in the cylindrical anchor 11. The driving pin 12 has an injection flow passage 33 having a push-opening part 31 for push-opening the expansively opening anchor part 22 and a pin body 32, penetratingly formed in the axis and injecting the adhesive R into the inserting filling hole 8. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an expansion anchor for a pinning method used for repairing (pinning) a wall body such as a building outer wall or inner wall in which a so-called “floating” has occurred, and a pinning method using the same.

Conventionally, this type of pinning method, in which an expansion anchor composed of a cone and a cylindrical anchor body is driven into an insertion hole that penetrates a finishing material such as a tile and the casing is drilled to a predetermined depth, This is done by injecting adhesive from the inlet. Moreover, after inject | pouring an adhesive agent, the counterbore hole formed in the insertion hole is obstruct | occluded with the cap comprised with the tile piece, and the anchor main body is concealed (for example, refer patent document 1).
The expansion anchor used for this is integrally composed of a cylindrical anchor body with an injection port and a cone that pushes the expanded anchor portion of the anchor body. The anchor body is composed of an expanded anchor part with which the cone is fitted, a trunk part connected to the expanded anchor part, and a flange part connected to the trunk part to receive impact, and a plurality of split slits are formed in the expanded anchor part. The body is formed with a plurality of openings for guiding the adhesive to the hole wall of the insertion hole. When an adhesive is injected from the flange portion of the anchor main body after the expansion anchor is driven, the adhesive is filled in the anchor main body, and then flows into the hole wall of the insertion hole from the plurality of split slits and the plurality of openings. Thereby, the hole wall of the insertion hole and the anchor main body are firmly bonded (anchored), and the temporarily fixed state by the expansion anchor is changed to the main fixed state by the adhesive, and the repair of the outer wall is completed.
JP 2000-34839 A

  In such a conventional pinning method using an expansion anchor, the adhesive fills from the front (shallow part) of the insertion hole when the adhesive is poured from the flange, so the adhesive is finished. Although it flows into the “floating” part of the material, air can accumulate in the housing part (the part where the insertion hole is deep), and the inflow is prevented. For this reason, there was a problem that anchoring of the expansion anchor to the casing by the adhesive was insufficient.

  An object of the present invention is to provide an expansion anchor for a pinning method capable of reliably anchoring an expansion anchor to a casing with an adhesive, and a pinning method using the same.

  The expansion anchor for the pinning method of the present invention is a cylindrical main body in the expansion anchor for the pinning method that is driven to press the finishing material into the insertion hole that penetrates the finishing material and drills the concrete frame to a predetermined depth. And an expanded anchor portion that is connected to the cylindrical body, and is inserted into the cylindrical anchor from the proximal end side so as to reach the bottom of the insertion hole. A driving pin that is driven by striking against the cylindrical anchor that pushes the expansion anchor portion, and the driving pin includes a push-out portion on the distal end side that pushes the expansion anchor portion, and a pin that continues to the push-out portion. And an injection channel for injecting an adhesive into the insertion hole.

  According to this configuration, when the cylindrical anchor and the driving pin are inserted into the drilled insertion hole, and the driving pin is driven with a hammer or the like while the cylindrical anchor has reached the hole bottom of the insertion hole, the driving pin The expansion anchor portion of the cylindrical anchor is pushed open by the push-opening portion, and the expansion anchor is anchored to the inner peripheral surface of the insertion hole. In addition, after anchoring the expansion anchor, if the adhesive is injected into the insertion hole from the injection flow path formed through the driving pin, the adhesive is fed into the innermost portion of the insertion hole through the injection flow path. . In other words, the adhesive can be gradually filled from the innermost part of the insertion hole by this injection flow path. Therefore, when the adhesive is injected, air does not accumulate in the deep portion of the insertion hole, and the adhesive can be spread all over the insertion hole.

  In this case, it is preferable that the driving pin is held in a state of being fitted to the cylindrical anchor.

  According to this configuration, since the cylindrical anchor and the driving pin can be handled as a single body, the insertion into the insertion hole can be easily performed from the beginning during storage.

  In these cases, the cap is further provided with a closing cap that is attached to the driving pin and closes the opening of the insertion hole. It is preferable to have a fitting shaft portion to be mated.

  According to this configuration, by using the injection flow path formed in the driving pin, by attaching the closing cap to the opening portion of the insertion hole, the opening portion is closed and the insertion pin or the cylindrical anchor is inserted into the insertion hole. Can be concealed and the repaired portion can be made inconspicuous. In order to make the repaired portion less conspicuous, it is preferable that the closing cap (at least the surface of the cap body) be the same color as the finishing material.

  Moreover, it is preferable that the driving pin further has a head portion connected to the pin body, and the head portion is formed to have a diameter larger than the diameter of the opening and to be thin.

  According to this configuration, since the head is formed with a diameter larger than the opening diameter of the insertion hole, when the driving pin is driven, the head directly presses the finishing material and the insertion hole in the capped state. Will be completely hidden. In addition, the head does not protrude greatly and becomes inconspicuous. In order to make the head less conspicuous, it is preferable to color the head so as to match the color of the finishing material.

  Similarly, it is preferable that the driving pin further has a head portion connected to the pin body, and the head portion is formed in a dish shape having a diameter larger than the diameter of the opening portion of the insertion hole.

  According to this configuration, the finishing material can be pressed with sufficient strength by the head, and the head can be given sufficient strength to withstand driving. That is, there is no deformation in the head when driven by a hammer or the like. In this case as well, in order to make the head less noticeable, it is preferable to color the head so as to match the color of the finishing material.

  The pinning method of the present invention is a pinning method in which a wall body is repaired using the above-described expansion anchor for the pinning method, and a finishing material is penetrated through a repair point of the wall body to a predetermined depth in the concrete frame. Drilling process for drilling the insertion hole, insertion process for inserting the expansion anchor into the insertion hole, driving process for driving the driving pin, and after the driving process, the adhesive is injected into the insertion hole from the injection channel. An adhesive injection step.

  According to this configuration, after the driving step, when the adhesive is injected from the injection channel of the driving pin into the insertion hole, the adhesive is filled from the innermost part of the insertion hole through the injection channel. go. For this reason, when the adhesive is injected, there is no air accumulation in the deep portion of the insertion hole, and the adhesive can be spread to every corner of the insertion hole. Can be firmly bonded (anchored). Therefore, anchoring of the expansion anchor to the concrete frame can be reliably performed by a physical fixing method and a chemical fixing method.

  Another pinning method of the present invention is a pinning method in which a wall body is repaired by using the above-described expansion anchor for the pinning method, and a finishing material is penetrated through a repair point of the wall body to a predetermined depth in a concrete frame. A drilling process for drilling the insertion hole, an insertion process for inserting the expansion anchor into the insertion hole, a driving process for driving the driving pin so that the head is inserted from the opening of the insertion hole, and driving After the process, an adhesive injection process for injecting an adhesive into the insertion hole from the injection flow path, and a cap mounting process for mounting a closing cap after the adhesive injection process are provided.

  According to this configuration, similarly to the above, the hole wall of the insertion hole and the expansion anchor can be firmly bonded (anchored), and the anchoring of the expansion anchor to the concrete frame with the adhesive is reliably performed. be able to. Moreover, the repair part by an expansion anchor can be made inconspicuous by a closure cap.

  Another pinning method of the present invention is a pinning method in which a wall body is repaired by using the above-described expansion anchor for the pinning method, and a finishing material is penetrated through a repair point of the wall body to a predetermined depth in a concrete frame. A drilling step for drilling the insertion hole, an insertion step for inserting the expansion anchor into the insertion hole, and a driving step for driving the driving pin so that the head abuts against the opening edge of the insertion hole, And an adhesive injection step of injecting an adhesive into the insertion hole from the injection flow path after the driving step.

  According to this configuration, similarly to the above, the hole wall of the insertion hole and the expansion anchor can be firmly bonded (anchored), and the anchoring of the expansion anchor to the concrete frame with the adhesive is reliably performed. be able to. Further, the finishing material can be directly pressed by the head of the driving pin, and the repaired portion by the expansion anchor can be made inconspicuous.

  Another pinning method of the present invention is a pinning method in which a wall body is repaired by using the above-described expansion anchor for the pinning method, and a finishing material is penetrated through a repair point of the wall body to a predetermined depth in a concrete frame. A drilling process for drilling the insertion hole, a chamfering process for chamfering the opening edge of the insertion hole according to the diameter of the head, an insertion process for inserting an expansion anchor into the insertion hole, and a head A driving step of driving a driving pin so as to be substantially flush with the finishing material, and an adhesive injection step of injecting an adhesive into the insertion hole from the injection flow path after the driving step .

  According to this configuration, similarly to the above, the hole wall of the insertion hole and the expansion anchor can be firmly bonded (anchored), and the anchoring of the expansion anchor to the concrete frame with the adhesive is reliably performed. be able to. Further, the finishing material can be firmly pressed by the head of the driving pin, and the repaired portion by the expansion anchor can be made inconspicuous.

  In these cases, after the adhesive injection step, it is preferable to further include a putty filling step of filling the opening portion of the injection flow channel in the head portion so as to be flush with the surface of the head portion.

  According to this configuration, it is possible to make the repaired portion inconspicuous by filling the opening portion of the injection flow path that is open to the outside, and to prevent intrusion of rainwater or the like from this portion. Can do. In addition, it is preferable that the putty used is colored so as to match the color of the finishing material.

  As described above, according to the expansion anchor and the pinning method of the present invention, the adhesive can be spread to every corner of the insertion hole, so that the hole wall of the insertion hole and the expansion anchor are firmly bonded (anchor). Ring), and anchoring of the expansion anchor to the concrete frame with an adhesive can be reliably performed.

  Hereinafter, an expansion anchor for a pinning method according to an embodiment of the present invention and a pinning method using the same will be described with reference to the accompanying drawings. This pinning method repairs the outer wall by driving an expansion anchor into the insertion hole drilled in the repair area such as the “floating part” of the outer wall to inject the finishing material and injecting an adhesive. . As shown in the sectional view of FIG. 1, the outer wall 1 is composed of a concrete frame 2 and a finishing material 3, and the finishing material 3 is composed of a mortar 4 and a decorative material 5 such as a tile or a stone stuck on the mortar 4. Yes. In this case, it is assumed that the first floating portion 6 is generated between the concrete frame 2 and the mortar 4 and the second floating portion 7 is generated between the mortar 4 and the decorative material 5. Further, in order to repair this, the outer wall 1 is formed with an insertion hole 8 that penetrates through the decorative material 5 and the mortar 4 and perforates the concrete casing 2 to a predetermined depth. Then, the expansion anchor 10 is driven into the insertion hole 8, and the adhesive R is injected through the driven expansion anchor 10, whereby the outer wall 1 is repaired.

  As shown in FIG. 1, the expansion anchor 10 is made of stainless steel or the like, and includes a cylindrical anchor 11 that is inserted into the insertion hole 8, and a driving pin 12 that is inserted into the cylindrical anchor 11 and driven into it by hitting. The decorative cap (closing cap) 13 closes the opening 8a of the insertion hole 8. On the other hand, the insertion hole 8 into which the expansion anchor 10 is inserted has a counterbore hole in the opening 8a, and penetrates the finishing material 3 and is drilled to a depth of 20 mm or more with respect to the concrete frame 2. .

  The cylindrical anchor 11 is integrally formed of a cylindrical main body 21 and an expanded anchor portion 22 that is continuous with the cylindrical main body 21. A flange portion 23 that holds the finishing material 3 is formed at the proximal end portion of the cylindrical main body 21, and a caulking portion that holds the driving pin 12 in a state in which the driving pin 12 is prevented from being held in the middle portion. 24 is formed. The expansion anchor portion 22 is formed in a concavo-convex shape by “caulking” or “drawing” processing, and split slits 26 extending in the axial direction are formed at a plurality of locations. Each concave portion of the expansion anchor portion 22 is an annular throttle portion, and the distal end side (pushing portion 31) of the driving pin 12 is placed on this portion to push open the expansion anchor portion 22. (Refer to (b) in the figure). The caulking portion 24 is formed so as to protrude to the inside of the cylindrical main body 21, and holds the driving pin 12 in a retaining state. The cylindrical anchor 11 and the driving pin 12 may be separated from each other, but the handling becomes easy by integrating them as described above.

  Instead of the caulking portion 24, this portion may be “drawing”, or a resin ring for retaining may be provided between the cylindrical main body 21 and the driving pin 12. Alternatively, the distal end side (pushing portion 31) of the driving pin 12 can be bonded to the expansion anchor portion 22 and integrated.

  The driving pin 12 is integrally formed with a push-out portion 31 on the distal end side that pushes the expansion anchor portion 22 and a pin main body 32 that continues to the push-out portion 31, and is driven into the cylindrical anchor 11. The base end of the pin main body 32 has a length that immerses inside the cylindrical anchor (the flange portion 23) 11 thereof. Further, an injection flow path 33 for injecting the adhesive R is formed through the shaft center of the driving pin 12. In this case, it is preferable that the diameter of the injection channel 33 is larger than that of the inner cylinder 57 so that an inner cylinder 57 of an injection nozzle 52 described later can be inserted. However, if the outer cylinder 58 of the injection nozzle 52 is pressed (sealed) against the opening 8 a and the adhesive R is injected, the injection can be performed even if the inner cylinder 57 is not inserted into the injection flow path 33. Become. Therefore, in practice, the diameter of the injection channel 33 is determined in consideration of the strength of the driving pin 12. In addition, it is preferable that the opening part of the injection | throwing flow path 33 is chamfered so that it may become funnel shape.

  On the other hand, an annular groove 34 that is slightly depressed is formed at the axially intermediate portion of the pin main body 32 so as to correspond to the caulking portion 24 of the cylindrical anchor 11. Further, the push-out portion 31 has a taper shape that is continuous with the pin body 32, and pushes the expanded anchor portion 22 of the tubular anchor 11 outward by hitting.

  The decorative cap 13 includes a disk-shaped cap body 41 formed to have the same diameter as the opening (counterbore hole) 8 a of the insertion hole 8, and a fitting shaft portion 42 that fits into the injection flow path 33 of the driving pin 12. , And are integrally formed. The cap body 41 is baked with the same color as the decorative material 5. When the cosmetic cap 13 is mounted so that the fitting shaft portion 42 is fitted to the injection flow path 33 of the driving pin 12, the cap body 41 is fitted into the opening 8a of the insertion hole 8, that is, a counterbore hole, and The surface of the cap main body 41 and the surface of the decorative material 5 are flush with each other, and the cosmetic cap 13 is inconspicuous.

  Here, with reference to FIG. 2, an adhesive injector 50 for injecting the adhesive R into the insertion hole 8 via the driving pin 12 will be briefly described. The adhesive injector 50 includes a pump-type injector main body 51 that supplies the adhesive R, and an injection nozzle 52 that is detachably attached to the injector main body 51. The injector body 51 includes a bottomed cylindrical casing 54, a pump body 55 to which the casing 54 is detachably attached, and a lever 56 held by the pump body 55. The casing 54 is filled with an adhesive R. By manually operating (pumping) the lever 56, the adhesive R is discharged from the injection nozzle 52 by a certain amount. In addition, although the epoxy resin adhesive is used for the adhesive agent R, it is not restricted to this, For example, various organic adhesive agents may be an inorganic adhesive agent etc. which has viscosity from the first.

  The injection nozzle 52 includes an injection needle-like inner cylinder 57 having a discharge port 57a formed at the tip, an outer cylinder 58 that slidably holds the inner cylinder 57 on the inner peripheral surface, and has an inside as an adhesive flow path, An attachment fitting 59 for holding the outer cylinder 58 and detachably attaching the outer cylinder 58 to the injector body 51 is provided. The outer cylinder 58 includes a seal rubber 58a having a tapered shape that holds the inner cylinder 57 slidably and is pressed against the opening 8a, and a cylindrical case 58b that encloses the seal rubber 58a, and a base end side of the cylindrical case 58b. A mounting bracket 59 is connected to the. The adhesive R sent out from the injector main body 51 by pumping flows from the outer cylinder 58 to the inner cylinder 57 and is injected into the insertion hole 8 from the discharge port 57a of the inner cylinder 57. At that time, it is preferable to pump the injector body 51 (inject the adhesive) while sealing the opening 8a with the seal rubber 58a of the outer cylinder 58 (pressing the outer cylinder 58).

  Here, with reference to FIG. 3 and FIG. 4, the procedure is demonstrated about the pinning method for repairing the outer wall 1 using said expansion anchor 10. FIG. This pinning method includes a drilling process for drilling an insertion hole 8 in a repaired portion of the outer wall 1, an insertion process for inserting the expansion anchor 10 into the insertion hole 8, a driving process for driving the driving pin 12, an injection An adhesive injection process for injecting the adhesive R into the insertion hole 8 through the flow path 33 and a capping process (cap mounting process) for mounting the decorative cap 13 are performed, and are executed in the order described above. Prior to the drilling step, the outer wall 1 is keyed to detect the drilling position (floating portion) of the insertion hole 8 and marking is performed at the center position of the decoration material 5 at the corresponding location.

  In the drilling step, the insertion hole 8 is drilled in the concrete casing 2 to a predetermined depth through the finishing material 3 at the marking location by a drilling tool 61 such as a diamond core drill (FIG. 3A). In this case, an auxiliary bit is attached to the base of the driver bit so that a counterbore hole is formed simultaneously. In addition, the drilling depth to the concrete housing 2 is 20 mm or more (Ministry of Land, Infrastructure, Transport and Tourism specification), and the diameter of the insertion hole 8 is 1 mm to 2 mm thicker than the diameter of the expansion anchor 10 (4 mm to 6 mm).

  In the insertion process, the expansion anchor 10 is inserted into the insertion hole 8 and set so that the flange portion 23 of the cylindrical anchor 11 contacts the counterbore hole (opening portion 8a) of the insertion hole 8 (FIG. 3B). )). In the subsequent driving step, for example, a dedicated punch 62 is applied to the driving pin 12, and the driving pin 12 is driven through the punch 62 with a hammer (FIG. 3C). When the driving pin 12 is driven, the expanded anchor portion 22 of the cylindrical anchor 11 opens outside in the insertion hole 8 and bites into the concrete frame 2. The driving is performed so that the base end of the driving pin 12 is located somewhat behind the flange portion 23.

  In the adhesive injection step, the resin injection device 50 is used, and the injection nozzle 52 is inserted into the injection flow path 33 of the driving pin 12 to inject the adhesive R (FIG. 4A). The adhesive R discharged from the injection nozzle 52 flows out from the tip of the driving pin 12 into the insertion hole 8 through the injection flow path 33. In this case, since the tip of the driving pin 12 reaches the innermost part of the insertion hole 8, the adhesive R is gradually filled from the innermost part of the insertion hole 8. Eventually, the adhesive R spreads to the first floating portion 6, subsequently reaches the second floating portion 7, and spreads to the second floating portion 7 (see FIG. 4B). In this way, when the adhesive R is sufficiently injected into the insertion hole 8, the first floating portion 6 and the second floating portion 7, the pumping becomes extremely heavy and the injection of the adhesive R is completed. Experienced. Note that the adhesive R fills up to the position of the counterbore, and before the adhesive R is cured, the process proceeds to the next capping step.

  In the capping step, the fitting shaft portion 42 is fitted into the injection flow path 33 of the driving pin 12 and the decorative cap 13 is fitted so as to be fitted into the counterbore hole (FIG. 4B). In this case, the decorative cap 13 is pushed in so that the surface of the cap body 41 and the surface of the decorative material 5 are flush with each other. Further, when the adhesive R overflows by being attached to the decorative cap 13, it is wiped off before the adhesive R is cured, or scraped off with a cutter or the like after it is cured.

  As described above, according to the expansion anchor 10 of the present embodiment, the injection channel 33 is formed in the axial center of the driving pin 12, and after the driving pin 12 is driven, the insertion is inserted through the injection channel 33. Since the adhesive R is injected into the hole 8, the adhesive R can be gradually filled from the deepest part (deep part) of the insertion hole 8. For this reason, an air pool does not arise in the deepest part of the insertion hole 8, and the insertion hole 8 and the expansion anchor 10 can be adhere | attached reliably. Therefore, anchoring of the expansion anchor 10 to the concrete housing 2 can be reliably performed by a physical fixing method and a chemical fixing method.

  Next, the expansion anchor 10 according to the second embodiment will be described with reference to FIGS. 5 and 6. In the expansion anchor 10 of this embodiment, the cylindrical anchor 11 is formed in a straight shape without the flange portion 23, and the driving pin 12 has a circular flat head portion 36 that continues to the proximal end of the pin body 32. is doing. Also in this case, the injection flow path 33 formed in the driving pin 12 passes through the head 36. Further, the insertion hole 8 is a straight hole without a counterbore hole in the opening 8a in accordance with the cylindrical anchor 11 without the flange 23.

  The head portion 36 of the driving pin is thin with a thickness of about 0.3 mm to 0.5 mm and has a diameter somewhat larger than the diameter of the opening 8 a of the insertion hole 8. This head portion 36 presses the finishing material 3 so as to close (capping) the opening 8a of the insertion hole 8, and is formed thin so as not to stand out. The head 36 is colored by baking painting or the like so as to match the color of the surface of the finishing material 3.

  In the insertion step in this case, the expansion anchor 10 is set so as to abut against the bottom of the insertion hole 8 (FIG. 6A), and in the subsequent driving step, the hammer is driven by a hammer (no punch 62 is required). The head 12 of the pin 12 is driven to a position where it comes into contact with the decorative material 5 (FIG. 6B). Further, the adhesive injection step is performed until the pumping becomes extremely heavy as in the first embodiment. Then, after pulling out the injection nozzle 52 from the injection flow path 33, a putty filling process for closing the opening portion of the injection flow path 33 is performed instead of the capping process. In the putty filling process, a putty toned to the same color as the head 36 of the driving pin 12 (same color as the decorative material 5) is prepared, and this is filled and placed in the opening portion of the injection flow path 33, and then used with a spatula. After smoothing or curing, it is scraped flat with a cutter and formed flush with the surface of the head 36 (FIG. 6C).

  When the driving is performed in this manner, the cylindrical anchor 11 expands in the insertion hole 8 and the expansion anchor 10 is anchored to the concrete frame 2, while the head 36 of the driving pin 12 is the finishing material. 3, the opening 8 a of the insertion hole 8 is closed. In this case, since the head 36 exposed on the surface of the finishing material 3 cannot be shaded, the repaired portion can be made inconspicuous. In addition, by injecting the adhesive R from the injection flow path 33, the anchoring of the expansion anchor 10 to the concrete housing 2 can be reliably performed by a physical fixing method and a chemical fixing method, as in the first embodiment. It can be carried out. Note that, similarly to the first embodiment, the cylindrical anchor 11 may be configured with a flange portion 23, and the finishing material 3 may be pressed by the driving pin 12 and the cylindrical anchor 11.

  Next, with reference to FIG. 7 and FIG. 8, the expansion anchor 10 which concerns on 3rd Embodiment is demonstrated. In the expansion anchor 10 of this embodiment, the cylindrical anchor 11 is formed in a straight shape without the flange portion 23, and the driving pin 12 has a dish-shaped head portion 37 that continues to the proximal end of the pin main body 32. Yes. Also in this case, the injection channel 33 formed in the driving pin 12 passes through the head portion 37. Further, the insertion hole 8 is a straight hole without a counterbore hole in the opening 8a in accordance with the cylindrical anchor 11 without the flange 23. The head 37 of the driving pin 12 has the same form as the head of a countersunk screw or the like (however, there is no tool groove) and has a diameter somewhat larger than the diameter of the opening 8 a of the insertion hole 8. Has been. The head 37 is colored by baking coating or the like so as to match the color of the surface of the finishing material 3 as in the first embodiment.

  In the pinning method in this case, after the insertion process, a chamfering process for chamfering the opening edge 8a of the insertion hole 8 in a hemispherical shape corresponding to the shape of the head 37 of the expansion anchor 10 is added. (FIG. 8A). In this chamfering process, it is preferable to use a spherical diamond bit 63. Subsequently, the expansion anchor 10 is set so as to abut against the bottom of the insertion hole 8 (FIG. 8B), and in the subsequent driving process, the head 37 of the driving pin 12 abuts against the decorative material 5 by a hammer. It is driven to the position (FIG. 8C). Further, the adhesive injection step is performed until the pumping becomes extremely heavy as in the first embodiment. Then, after pulling out the injection nozzle 52 from the injection flow path 33, a putty filling process for closing the opening portion of the injection flow path 33 is performed instead of the capping process, as in the second embodiment.

  When the driving is performed in this manner, the cylindrical anchor 11 expands in the insertion hole 8, and the expansion anchor 10 is anchored to the concrete frame 2, while the head 37 of the driving pin 12 is chamfered. The surface of the head 37 and the surface of the finishing material 3 are flush with each other. Thereby, the head 37 closes the opening 8 a of the insertion hole 8 so as to press the finishing material 3. Moreover, the expansion anchor 10 after construction is colored in the same color as the finishing material 3, and the repaired portion is extremely inconspicuous. Furthermore, by injecting the adhesive R from the injection flow path 33, as in the first embodiment, the anchoring of the expansion anchor 10 to the concrete housing 2 is ensured by the physical fixing method and the chemical fixing method. It can be carried out. Note that, similarly to the first embodiment, the cylindrical anchor 11 may be configured with a flange portion 23, and the finishing material 3 may be pressed by the driving pin 12 and the cylindrical anchor 11.

It is sectional drawing (a) before anchoring of the expansion anchor which concerns on one Embodiment of this invention, and (b) Sectional drawing after anchoring. It is an external view of an adhesive injection device. It is (a) drilling process figure in a pinning construction method, (b) insertion process figure, and (c) driving process figure. It is (a) adhesive injection process figure and (b) capping process figure in a pinning construction method. It is sectional drawing of the expansion anchor which concerns on 2nd Embodiment. It is (a) insertion process drawing in a pinning construction method, (b) implantation process drawing, and (c) putty filling process drawing. It is sectional drawing of the expansion anchor which concerns on 3rd Embodiment. It is (a) chamfering process drawing, (b) insertion process drawing, and (c) driving process drawing in the pinning method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer wall 2 Concrete body 3 Finishing material 5 Decoration material 8 Insertion hole 8a Opening part 10 Expansion anchor 11 Cylindrical anchor 12 Driving pin 13 Cosmetic cap 21 Cylindrical main body 22 Expanding anchor part 24 Caulking part 31 Pushing part 32 Pin Main body 33 Injection flow path 41 Cap main body 42 Fitting shaft portion 36 Head portion 37 Head portion R Adhesive

Claims (10)

In the expansion anchor for the pinning method that is driven to press the finishing material into the insertion hole that penetrates the finishing material and drills the concrete frame to a predetermined depth,
A cylindrical anchor having a cylindrical main body and an expanded anchor portion connected to the cylindrical main body, and being inserted into the insertion hole;
A driving pin that fits into the cylindrical anchor from the base end side and is driven by striking the cylindrical anchor that is inserted so as to reach the bottom of the insertion hole and pushes the expanded anchor portion; ,
The driving pin has a push-out portion on the distal end side that pushes the expansion anchor portion, and a pin body that is continuous with the push-open portion,
An expansion anchor for a pinning method, characterized in that it has an injection flow path formed through the shaft and for injecting an adhesive into the insertion hole.   The expansion anchor for the pinning method according to claim 1, wherein the driving pin is held in a state of being fitted to the cylindrical anchor. A closing cap that is attached to the driving pin and closes the opening of the insertion hole;
The said closing cap has the cap main body formed in the same diameter as the said opening part, and the fitting axial part fitted to the said injection | pouring flow path in the said pin main body, The Claim 1 characterized by the above-mentioned. An expansion anchor for the pinning method according to 2. The driving pin further has a head connected to the pin body,
The expansion anchor for the pinning method according to claim 1 or 2, wherein the head is formed to have a diameter larger than that of the opening and is thin. The driving pin further has a head connected to the pin body,
The expansion anchor for the pinning method according to claim 1 or 2, wherein the head is formed in a dish shape having a diameter larger than the diameter of the opening of the insertion hole. A pinning method for repairing a wall body using the expansion anchor for the pinning method according to claim 1 or 2,
A drilling step of drilling an insertion hole of a predetermined depth in the concrete frame by penetrating the finishing material into the repair required portion of the wall;
An insertion step of inserting the expansion anchor into the insertion hole;
A driving step of driving the driving pin;
A pinning method comprising: an adhesive injection step of injecting an adhesive from the injection flow channel into the insertion hole after the driving step. A pinning method for repairing a wall body using the expansion anchor for the pinning method according to claim 3,
A drilling step of drilling an insertion hole of a predetermined depth in the concrete frame by penetrating the finishing material into the repair required portion of the wall;
An insertion step of inserting the expansion anchor into the insertion hole;
A driving step of driving the driving pin so that the head is immersed from the opening of the insertion hole;
After the driving step, an adhesive injection step of injecting an adhesive into the insertion hole from the injection flow path,
A pinning method comprising: a cap mounting step of mounting the closing cap after the adhesive injection step. A pinning method for repairing a wall body using the expansion anchor for the pinning method according to claim 4,
A drilling step of drilling an insertion hole of a predetermined depth in the concrete frame by penetrating the finishing material into the repair required portion of the wall;
An insertion step of inserting the expansion anchor into the insertion hole;
A driving step of driving the driving pin so that the head comes into contact with an opening edge of the insertion hole;
A pinning method comprising: an adhesive injection step of injecting an adhesive from the injection flow channel into the insertion hole after the driving step. A pinning method for repairing a wall body using the expansion anchor for the pinning method according to claim 5,
A drilling step of drilling an insertion hole of a predetermined depth in the concrete frame by penetrating the finishing material into the repair required portion of the wall;
A chamfering step of chamfering the opening edge of the insertion hole in accordance with the diameter of the head;
An insertion step of inserting the expansion anchor into the insertion hole;
A driving step of driving the driving pin so that the head is substantially flush with the finishing material;
A pinning method comprising: an adhesive injection step of injecting an adhesive from the injection flow channel into the insertion hole after the driving step.   The method further comprises a putty filling step of filling the putty of the opening of the injection channel in the head so as to be flush with the surface of the head after the adhesive injection step. The pinning method according to 8 or 9.

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