JP2007120273A - Anchoring member for repairing wall face and wall face repairing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive anchoring member for allowing simple execution of fall prevention work for facing materials of buildings such as tiles. <P>SOLUTION: The anchoring member 1 provided on the surface of a concrete structure or the like for preventing a facing material from falling comprises a rod-like anchor pin 10 having a thread formed on the outer surface thereof over the whole length, a cap 30 mounted on the outer circumference of the rear end of the anchor pin 10 and having the distal end of an outer diameter larger than the outer diameter of a hole made in the facing material and a pin support 20 provided with four protrusions on the circumference. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a member for repairing an outer wall of a structure such as a building and a wall surface repair method using the same, and more particularly to an anchor member suitable for wall surface repair for preventing fall of exterior materials such as tiles and a wall surface using the same. It relates to the repair method.

Recently, various tiles and the like have been used as exterior materials for buildings and the like from the viewpoint of durability and aesthetics. However, there are frequent accidents in which exterior materials such as tiles fall due to peeling or cracking of mortar that fixes tiles and the like caused by aging. As a measure for preventing such an accident, a method for driving an anchor member from a tile surface to a building structure material such as concrete has been conventionally performed in part. As a typical anchor member used for such a construction method, a conventional anchor member described in, for example, Patent Document 1 is known.
JP-A-8-128210

  The main body of the conventional anchor member, that is, the anchor pin, is composed of a stainless steel cylindrical tube having a jaw at one end. When repairing a wall surface, first, a hole communicating from an exterior material such as a tile to a mortar and a concrete structure is opened. And it inserts in the communicating hole in which the anchor pin was pierced. After the insertion, the tip of the anchor pin is expanded by driving the pin inside the anchor pin, and is fixed to the inner wall of the communication hole formed in the building structure. Thereafter, an adhesive is injected from the rear part (chin part) of the anchor pin. Immediately after injection of the adhesive, a closing member having a flange portion, which is an adhesive sealing member, is forcibly press-fitted with a hammer or the like. Through this series of steps, tiles and the like are firmly mechanically fixed to a structural material such as a building. As is clear from the above description, the conventional anchor member is inserted into the cylindrical tube from the rear portion of the cylindrical tube having a jaw portion at one end and the other end being expanded. It is comprised from the closure member for sealing an adhesive agent.

  In this conventional anchor member, since the anchor pin as a main body is a relatively thick cylindrical tube made of stainless steel, it has a very large shear strength in terms of structure and exhibits an excellent effect for preventing falling of tiles and the like. . However, there are problems in that the construction method is somewhat complicated as described above and the price is structurally high.

An object of the present invention is to provide an anchor member that has a simple structure and can be manufactured at low cost.
Another object of the present invention is to provide a construction method that can be constructed more easily than a conventional tile fall prevention method.

  An anchor member according to a preferred aspect of the present invention is a rod-shaped anchor pin provided with at least one concave portion between a front end portion and a central portion, and is attached to a rear end portion of the anchor pin. At least a cap having an outer diameter at least at the rearmost end larger than an outer diameter of a hole drilled through from the surface of the exterior material to the inside of the structural material, and the concave portion of the anchor pin It is composed of a pin support having at least three protrusions. By adopting such a configuration, when the anchor pin is inserted, the pin support acts on the inner wall surface of the hole of the structural material to prevent the anchor pin from jumping out to the outside of the structural material. The outer material can be prevented from being detached from the structural material by the interaction between the cap support and the pin support whose outer diameter is larger than the outer diameter of the hole. Before the anchor pin is inserted into the drilled hole, the anchor pin can be more firmly fixed by filling the hole with an appropriate amount of adhesive.

  Further, in an anchor member having a simpler structure, a rod-like screw having a continuous groove around its entire length is used as the anchor pin, and a part of the screw groove is used as the recess.

  Furthermore, in an anchor member having a simpler structure, the cap is usually integrated with the anchor pin, like a plus screw or a minus screw used in construction. In this case, in order to hold down the exterior material, it is important to make the outer diameter of the flange portion larger than the outer shape of the drilled hole. Other structures are the same as the two types of anchor members described above.

  In the preferred wall surface repair method of the present invention, a hole communicating from the surface of the exterior material or the like to the inside of the concrete structure material or the like is formed in order to prevent the exterior material or the like provided on the surface of the concrete structure material or the like from falling. And then injecting an adhesive into the hole, and then mounting the rod-shaped anchor pin provided with at least one recess between the front end portion and the central portion, the rear end portion of the anchor pin, An anchor comprising a cap having an outer diameter at the rearmost end portion of the cap larger than the outer diameter of the drilled hole, and a pin support having at least three protrusions around the cap, which is fitted into the concave portion of the anchor pin. The member is inserted into the drilling hole before the adhesive is solidified.

  In the wall surface repairing method, the anchor member of the other form described so far can be used as the anchor member. In either method, in order to further improve the strength with which the anchor pin engages with the inner wall of the drilling hole while maintaining appropriate insertion resistance when the anchor pin is inserted into the drilling hole, Most preferably, a pin support having four protrusions is used.

The anchor member of the present invention has a simple anchor pin structure and can be manufactured at a low cost.
In addition, when the anchor member of the present invention is used, after the anchor pin is driven into the structure body, there is no need to perform processing such as expanding the anchor pin as in the conventional method, so it is easier than the conventional wall repair method. It is.

  Initially, the structure of the anchor member which concerns on one Example of this invention is demonstrated using FIG. Throughout the drawings, the same reference numeral indicates a functionally substantially identical configuration. FIG. 1 shows the overall structure of an anchor member according to a first embodiment of the present invention.

  In FIG. 1, reference numeral 10 denotes a stainless steel anchor pin having a total length of about 50 mm and a diameter of about 4 mm. An enlarged view of this anchor pin is shown in FIG. The total length Lp and the diameter Rp of the anchor pin can be arbitrarily determined in consideration of the total load applied to the anchor pin, the tensile strength, and the like. Since the anchor pin of FIG. 2 has a uniform configuration over the entire length, it is possible to change the total length Lp as necessary at the construction site. The outer periphery of the anchor pin 10 is threaded over the entire length L (shown by hatching in the figure). The pitch P of the screw can be arbitrarily determined. As will be described later, in order to insert the anchor pin into the side wall of the hole provided in the structural material as parallel as possible, it is preferable to set the pitch so that the angle formed by the pin support 20 with respect to the pin 10 is as small as possible. .

  FIGS. 3A and 3B are enlarged views of the cap 30 shown in FIG. FIG. 3A is an enlarged side view, and FIG. 3B is an enlarged perspective view. The cap 30 is preferably made of brass from the viewpoint of durability and the like. Reference numeral 301 denotes a jagged groove called a so-called knurl, and is provided to improve the adhesion to the tile. This knurling merely enhances the adhesion effect, and is not necessarily required for the present invention. Reference numeral 302 denotes a flange portion. The flange portion 302 has an outer diameter slightly larger than the diameter of a hole drilled from the surface of the exterior material or the like to the inside of the concrete structure material or the like, and will be described later by pressing the exterior material or the like with the flange portion. It prevents the exterior material and the like from being peeled off from the structural material and the like by the interaction with the pin support. In addition, before the anchor pin is inserted into the hole, the anchor pin can be more firmly fixed by filling the hole with an appropriate amount of adhesive. In this embodiment, the cap 30 is manufactured as a separate part and incorporated in the anchor pin 10. This is because it is advantageous when the surface of the flange portion is preliminarily baked and painted in the same color as the exterior material such as tile or the like. Although not shown in the drawing, the side opposite to the flange portion is opened so that the cap 30 is attached to the anchor pin 10. That is, the cap 30 has a cylindrical shape with one end opened, and a female screw is cut on the inner side wall of the cylinder.

  A detailed structure of the pin support 20 shown in FIG. 1 is shown in FIGS. 4 (a) to 4 (c). 4A is a top view of the pin support, FIG. 4B is a cross-sectional view taken along the line AA ′ of the pin support 20 of FIG. 4A, and FIG. 4C is FIG. 4A. It is the perspective view which looked at the pin support shown from the paper upper surface. The pin support 20 is made, for example, by punching a stainless steel plate into a star shape (a shape in which the wings of the pin support in FIG. 4A are elongated). The diameter of the central opening 400 of the star pin support is set to be slightly smaller than the diameter of the anchor pin 10. The protrusions 401, 402, 403, and 404 are slightly bent in one direction as shown in FIG. By bending the protruding portion of the pin support 20 in one direction, the anchor member can be smoothly press-fitted into a hole formed in a structural material such as concrete. Therefore, this bending angle can be set to an arbitrary angle. In any case, as shown in FIG. 4B, the diameter Rs of the pin support 20 which is the final product is set to be slightly larger than the diameter of the hole opened in the structural material. That is, in actual construction, a hole having a diameter slightly smaller than the diameter Rs is drilled in a concrete structure material or the like. As an example of a specific structure, for example, if the diameter of the drill hole is 6φ, the diameter of the anchor pin is 4φ, the pitch of the male screw around the anchor pin is 0.7, and the diameter Rs of the pin support 20 is 6.5 to 6.8φ, the thickness is 0.3 mm, and the diameter of the central opening 200 is 3.5φ.

  The anchor pin 10, the pin support 20, and the cap 30 are manufactured separately and then assembled as an integrated product. In the case of the anchor pin having the structure shown in FIG. 12 described later, as a matter of course, the anchor member is formed only by incorporating only the pin support 20 later.

Next, a method for preventing the exterior material such as tiles from falling using the anchor member of the present invention will be described with reference to FIGS.
Please refer to FIG. First, using a high-speed rotating drill (not shown), a hole 60 communicating with the structure 60 such as a concrete structure and the exterior material 80 such as tiles provided on the surface thereof and / or the mortar 70 is formed. . Drilling is a one-step digging. Thereafter, the adhesive 50 is injected into the drilled hole, and the aforementioned anchor member 1 is immediately inserted. Reference is now made to FIG. The insertion is performed until the flange portion 302 of the cap of the anchor member comes into contact with the exterior material 80. As shown in FIG. 6, the flange portion 302 is finally installed outside the hole 40 so as to hold the exterior material 80. This anchor member is formed by the same method regardless of which of the two types of anchor members described above.

  Finally, the anchor member is fixed to the structure in the form as shown in FIG. By adopting such a configuration, when the anchor pin is inserted, the pin support acts on the inner wall surface of the hole of the structural material to prevent the anchor pin from jumping out of the structural material, and the outer diameter is It is possible to prevent the exterior material from being detached from the structural material by the interaction between the cap flange portion and the pin support, which is larger than the outer diameter of the hole. Before the anchor pin is inserted into the drilled hole, the anchor pin can be more firmly fixed by filling the hole with an appropriate amount of adhesive.

  In the anchor member according to the present invention, FIG. 7 to FIG. 10 show the tensile strength and indentation strength of the structure having three pin support protrusions and the structure having four protrusions. Here, FIGS. 7 and 8 are data for an example of three blades (a structure in which protrusions are arranged at intervals of 120 degrees), and FIGS. 9 and 10 are data for an example of a four-blade structure. It is. 7 and 9 show the strength when no adhesive is inserted, and FIGS. 8 and 10 show the strength when the adhesive is inserted. From these figures, it can be seen that the strength is remarkably increased by filling the adhesive, and the strength is increased in the four-blade structure than in the three-blade structure. Although data for five or more blades is not shown in the figure, conversely the indentation strength, which is a negative factor, increases, so four blades are the optimal structure.

  In the above, especially the anchor member of all the screw pins was demonstrated. However, the present invention is not limited to the above-described embodiments, and is included in the claims of the present application without departing from the scope of the technical idea of the present invention. For example, in order to mount the pin support, it is sufficient if at least one recess is provided between the frontmost end portion and the center portion of the anchor pin. Such a recess can be easily provided by caulking or the like.

  Further, as shown in FIG. 11, the cap structure of the anchor member according to the first embodiment described above can be made simpler by tapering the cap. The cap shown in FIG. 11 is configured such that the foremost end is opened and screwed into the anchor pin from the foremost end in the same manner as the cap described above. However, the cap is tapered so that the outer diameter of the cap gradually decreases from the rearmost end to the frontmost end. Further, the diameter of the rear end portion is set to be larger than the diameter of the hole for drilling the structural material, whereby the structure of the flange portion of the cap used in the previous embodiment can be simplified.

  As shown in FIG. 12, there is no significant problem even if the anchor pin and the cap are manufactured as an integral structure from the beginning. In this case, it is necessary to set the cap 300 to have a diameter larger than the diameter of the hole formed in the structural material and to reduce the thickness of the cap 300 so that the cap 300 does not protrude so much from the tile wall surface.

  FIG. 1 is an overall configuration diagram of an anchor member according to a first embodiment of the present invention.   FIG. 2 is an enlarged view of an anchor pin used for the anchor member according to the first embodiment of the present invention.   FIG. 3 is an enlarged view of a cap used for the anchor member according to the first embodiment of the present invention.   FIG. 4 is an enlarged view of a pin support used for the anchor member according to the first embodiment of the present invention.   FIG. 5 is an explanatory diagram of a wall surface repair method using an anchor member according to the first embodiment of the present invention.   FIG. 6 is an explanatory diagram of a wall surface repair method using an anchor member according to the first embodiment of the present invention.   FIG. 7 is an explanatory view of the effect of the anchor member according to the first embodiment of the present invention.   FIG. 8 is an explanatory view of the effect of the anchor member according to the first embodiment of the present invention.   FIG. 9 is an explanatory view of the effect of the anchor member according to the first embodiment of the present invention.   FIG. 10 is an explanatory view of the effect of the anchor member according to the first embodiment of the present invention.   FIG. 11 is an overall configuration diagram of an anchor member according to a second embodiment of the present invention.   FIG. 12 is an overall configuration diagram of an anchor member according to a third embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Anchor member 10 Anchor pin 20 Pin support 30 Cap 40 Drilling hole 50 Adhesive 60 Concrete structure material 70 Mortar 80 Tile

Claims (9)

An anchor member inserted into a hole drilled so as to communicate from the surface of the exterior material or the like to the inside of the concrete structure material in order to prevent the exterior material or the like provided on the surface of the concrete structure material from falling. There,
A rod-shaped anchor pin provided with at least one recess between the front end and the center;
Mounted on the rear end of the anchor pin, and fitted around the cap having the outer diameter of at least the rearmost end of the cap larger than the outer diameter of the drilling hole and the recess of the anchor pin. A pin support having at least three protrusions;
An anchor member comprising:   2. The anchor member according to claim 1, wherein the anchor pin is a rod-like screw having a groove continuous around the entire length thereof, and the concave portion is a part of the screw groove.   3. The anchor member according to claim 2, wherein the cap is configured such that a foremost end is opened and screwed into the anchor pin from the foremost end, and at the same time, an outer diameter thereof extends from the foremost end to the foremost end. An anchor member having a taper that gradually decreases toward a portion.   The anchor member according to any one of claims 1 to 3, wherein the vicinity of the tip of the projection of the pin support is bent toward the rear end of the anchor pin. An anchor member inserted into a hole drilled so as to communicate from the surface of the exterior material or the like to the inside of the concrete structure material in order to prevent the exterior material or the like provided on the surface of the concrete structure material from falling. There,
A rod-shaped anchor pin provided with a flange having an outer diameter larger than the outer diameter of the drilled hole at the rearmost end, and at least one recess provided between the frontmost end and the central portion; and A pin support having at least three protrusions on the periphery, which is fitted into the recess of the anchor pin;
An anchor member comprising:   The anchor member according to claim 5, wherein the anchor pin is a rod-like screw having a continuous groove around its entire length, and the concave portion is a part of the screw groove. The anchor member according to claim 5 or 6, wherein the vicinity of the tip of the projection of the pin support is bent toward the rear end of the anchor pin. In order to prevent the exterior material etc. provided on the surface of the concrete structure material from falling, a hole communicating from the surface of the exterior material etc. to the inside of the concrete structure material etc. is drilled,
Pour adhesive into the holes,
Thereafter, a rod-shaped anchor pin provided with at least one recess between the frontmost end portion and the central portion is attached to the rear end portion of the anchor pin, and the outer diameter of the rearmost end portion of the cap An anchor member composed of a cap larger than the outer diameter of the hole and a pin support having at least three protrusions fitted around the recess of the anchor pin, while the adhesive is not solidified. A wall surface repair method characterized by being inserted into a drilled hole. In order to prevent the exterior material etc. provided on the surface of the concrete structure material from falling, a hole penetrating from the surface of the exterior material etc. to the inside of the concrete structure material is drilled,
Pour adhesive into the holes,
Thereafter, a rod-like anchor pin provided with a flange having an outer diameter larger than the outer diameter of the drilled hole at the rearmost end, and at least one recess provided between the frontmost end and the central portion, And an anchor member made of a pin support having at least three protrusions in the periphery, which is fitted in the concave portion of the anchor pin, is inserted into the perforated hole before the adhesive is solidified. Wall repair method.

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