Fixing brackets and joining methods

Abstract

To provide a fixing metal fitting easy to determine whether or not an adhesive is filled in a hole part of a fixing object in which a rod-like jointing tool is inserted, in a GIR jointing or Chemical Anchor (R) jointing.SOLUTION: A fixing metal fitting includes a cylindrical fastening member having an opening at a center, and a metal fitting body having a flat plate part provided with a circular hole. The cylindrical fastening member has a cutout groove provided at one end. At a position where the opening overlaps the circular hole, the one end of the cylindrical fastening member and one face of the flat plate part are fixed, and the opening part is communicated with the cylindrical fastening member through the cutout groove.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a fixing fitting and a joining method.

Background Art

[0002] Conventionally, in wooden buildings, as a method of axially joining woods with each other using dissimilar members (such as metal fittings and steel bars), GIR (Glued in Rod) joining is known. GIR (Glued in Rod) joining is a joining method in which a hole is made in wood, and stress is transmitted through the adhesive force of the adhesive and the joining tool to generate joining strength by curing the adhesive injected and filled in the gap with the rod-shaped joining tool inserted therein.

[0003] In addition, as technologies related to GIR joining, for example, Patent Documents 1 and 2 are known.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] On the other hand, for example, in the structural reinforcement of a wooden building using GIR joining, there are cases where a fitting with a desired shape is fixed together with a rod-shaped joining tool near the hole formed in the wood. In such a case, since the periphery of the hole in the wood is covered with the fitting, there is a problem that it is difficult to visually confirm whether the hole inside (the gap between the rod-shaped joining tool and the hole) is filled with the adhesive when the rod-shaped joining tool is inserted into the hole. [[ID=]44]

[0006] This invention has been made in view of the above circumstances, and aims to provide a fixing fitting that can easily determine whether or not adhesive is filled inside the hole of the object to be fixed (for example, wood or concrete) into which a rod-shaped fastener is inserted, in GIR jointing or chemical anchor (registered trademark) jointing, and a joining method using the same. [Means for solving the problem]

[0007] To solve the above problems, the fixing bracket of the present invention is A cylindrical fastening member with an opening in the center, A metal fitting body having a flat plate portion with a circular hole, Includes, The cylindrical fastening member has a notched groove at one end, The invention is characterized in that one end of the cylindrical fastening member and one surface of the flat plate portion are fixed at a position where the opening and the circular hole overlap, and the opening and the outside of the cylindrical fastening member are in communication through the notched groove.

[0008] The present invention provides a method for joining an object to be fixed, a fixing bracket according to claim 1, and a rod-shaped fastener, comprising the following steps: The first step involves injecting adhesive into holes provided in the object to be fixed; A second step involves bringing the other surface of the flat plate portion of the fixing bracket into contact with the periphery of the hole, thereby aligning the positions of the opening of the cylindrical fastening member, the circular hole of the bracket body, and the hole of the object to be fixed; The third step involves inserting the rod-shaped fastener into the hole of the object to be fixed through the opening of the cylindrical fastening member and the circular hole of the metal fitting body, and then fixing the rod-shaped fastener and the object to be fixed with the adhesive. Its technical features include the inclusion of [this feature]. [Effects of the Invention]

[0009] According to the fixing bracket and joining method of the present invention, in GIR joining and chemical anchor (registered trademark) joining, it is possible to easily determine whether or not adhesive has filled the inside of the hole of the object to be fixed into which the rod-shaped fastener has been inserted. [Brief explanation of the drawing]

[0010] [Figure 1] This is a side view illustrating one embodiment of the fixing bracket of the present invention. [Figure 2] Figure 1 is a perspective view of the cylindrical fastening member (nut) in the fixing bracket shown as an example. [Figure 3] This is a schematic diagram illustrating one embodiment of the method for joining wood and a rod-shaped fastener according to the present invention. [Figure 4] This is a schematic diagram illustrating one embodiment of the method for joining wood and a rod-shaped fastener according to the present invention. [Modes for carrying out the invention]

[0011] An embodiment of the fixing bracket of the present invention will be described below. Figure 1 is a side view illustrating an embodiment of the fixing bracket of the present invention. Figure 2 is a perspective view of the cylindrical fastening member in the fixing bracket illustrated in Figure 1.

[0012] The fixing bracket 1 comprises a cylindrical fastening member 2 and a bracket body 3.

[0013] The cylindrical fastening member 2 has an opening 21 in the center and a notched groove 22 at one end.

[0014] Specifically, in the embodiments shown in Figures 1 and 2, a grooved hexagonal nut is exemplified as the cylindrical fastening member 2. Specifically, this cylindrical fastening member 2 has an internal thread formed on the inner wall surface that forms a roughly cylindrical opening 21 in the center, and a plurality of notched grooves 22 are provided at one end in the axial direction. The notched grooves 22 penetrate radially through the outer circumference 23 of the cylindrical fastening member 2 (nut) at one end in the axial direction, and the central opening 21 and the outside of the outer circumference 23 are in communication through the notched grooves 22.

[0015] The position, number, width and depth of the notch groove 22 are not particularly limited, and can be appropriately set according to, for example, the size of the hole in the object to be fixed (such as wood or concrete) and the amount of adhesive injected into the hole.

[0016] In addition, the outer shape, the axial length, the inner diameter of the opening 21, etc. of the cylindrical fastening member 2 can also be appropriately designed according to the form and diameter of the rod-shaped joint portion described later.

[0017] The fitting main body 3 includes a flat plate portion 32 provided with a circular hole 31.

[0018] The flat plate portion 32 is preferably a thin plate-shaped metal. The shape of the flat plate portion 32 is not particularly limited and can be appropriately set according to the desired joining structure. For example, a rectangular shape when viewed from the front, a circular shape when viewed from the front, etc. can be exemplified.

[0019] The size of the circular hole 31 corresponds to the size of the opening 21 of the cylindrical fastening member 2.

[0020] The fitting main body 3 only needs to include the flat plate portion 32, and the overall shape etc. are not particularly limited. That is, the fitting main body 3 can be, for example, various forms that can be used for the structural reinforcement of wooden buildings, and may have upright pieces that bend from the end of the flat plate portion 32.

[0021] One end of the cylindrical fastening member 2 (the end on the side where the notch groove 22 is provided) of the fixing fitting 1 and one surface of the flat plate portion 32 of the fitting main body 3 are in contact with each other and fixed. In this state, in the fixing fitting 1, the opening 21 of the cylindrical fastening member 2 and the circular hole 31 of the flat plate portion 32 of the fitting main body 3 overlap in the vertical direction. The fixing method of the cylindrical fastening member 2 and the fitting main body 3 is not particularly limited, and for example, methods such as welding and using an adhesive can be exemplified.

[0022] The notch groove 22 of the cylindrical fastening member 2 forms a gap between the flat plate portion 32 of the fitting main body 3. Therefore, the fixing fitting 1 communicates the opening 21 of the cylindrical fastening member 2 with the outside through the notch groove 22 of the cylindrical fastening member 2.

[0023] Next, an embodiment of the joining method of the present invention will be described.

[0024] The joining method of the present invention is a method for joining an object to be fixed, the fixing fitting of the present invention described above, and a rod-shaped fastener. Figures 3 and 4 are schematic diagrams illustrating one embodiment of the joining method of the present invention.

[0025] The joining method of the present invention involves the following steps: The first step involves injecting adhesive G into a hole H provided in the object W to be fixed; The second step involves bringing the other surface of the flat plate portion 32 of the fixing bracket 1 into contact with the periphery of the hole portion H, thereby aligning the positions of the opening 21 of the cylindrical fastening member 2, the circular hole 31 of the bracket body 3, and the hole portion H of the object to be fixed W; The third step involves inserting the rod-shaped fastener B into the hole H of the object to be fixed W through the opening 21 of the cylindrical fastening member 2 and the circular hole 31 of the metal fitting body 3, and then fixing the rod-shaped fastener B and the object to be fixed W with adhesive G. Includes.

[0026] The following describes each step.

[0027] In the first step, adhesive G is injected into holes H provided in the object to be fixed (for example, wood or concrete) W.

[0028] The hole H can be formed to a predetermined diameter and depth using a drill or the like. The inside of the hole H can be cleaned as needed.

[0029] The type of adhesive G is not particularly limited, but adhesives for chemical anchors (registered trademark) are a preferred example. The amount of adhesive G injected can be appropriately designed according to the size of the hole H and the size of the rod-shaped fastener B.

[0030] In the second step, the other side of the flat plate portion 32 of the fixing bracket 1 (the side to which the cylindrical fastening member 2 is not fixed) is brought into contact with the periphery of the hole portion H of the object to be fixed W, so that the positions of the opening 21 of the cylindrical fastening member 2, the circular hole 31 of the bracket body 3, and the hole portion H of the object to be fixed W are aligned. As a result, the opening 21 of the cylindrical fastening member, the circular hole 31 of the bracket body 3, and the hole portion H of the object to be fixed W are in communication in the vertical direction.

[0031] Furthermore, the fixing bracket 1 can be fixed to the object W using various methods.

[0032] In the third step, the rod-shaped fastener B is inserted into the hole H of the object to be fixed W through the opening 21 of the cylindrical fastening member 2 and the circular hole 31 of the metal fitting body 3, and the rod-shaped fastener B and the object to be fixed W are fixed together with adhesive G.

[0033] The rod-shaped fastener B is not particularly limited, but a bolt having a head b1 and a small hole clearance is preferred. In this embodiment, a hexagonal bolt having a head b1 is exemplified, and when the rod-shaped fastener B (hexagonal bolt) is inserted to a predetermined depth in the hole H, the rod-shaped fastener B can be inserted through the opening 21 of the cylindrical fastening member 2, and its head b1 can come into contact with the cylindrical fastening member 2, thereby fixing the rod-shaped fastener B in the vertical and horizontal directions.

[0034] By inserting the rod-shaped fastener B into the hole H, the adhesive G rises into the hole H and fills the space inside the hole H (the gap between the rod-shaped fastener B and the hole H). As this adhesive G hardens, the rod-shaped fastener B and the object W to be fixed are secured together.

[0035] The third step allows us to determine whether or not the hole H is filled with adhesive G by checking for the presence or absence of adhesive G flowing out from the notched groove 22 of the cylindrical fastening member 2. That is, when the rod-shaped fastener B is inserted into the hole H, the adhesive G fills the hole H, and a portion of the adhesive G passes through the circular hole 31 of the metal fitting body 3 and flows out from the opening 21 of the cylindrical fastening member 2. Therefore, if adhesive G flows out from the opening 21 of the cylindrical fastening member 2, it can be determined that the hole H is filled with adhesive G. In other words, if adhesive G does not flow out from the opening 21 of the cylindrical fastening member 2, it can be determined that the amount of adhesive G injected into the hole H is insufficient, and that the hole H may not be filled with adhesive G.

[0036] Furthermore, in the joining method of the present invention, in the third step, the adhesive G that flows out from the opening 21 of the cylindrical fastening member 2 hardens on the flat plate portion 32 of the metal fitting body 3, which has the advantage of eliminating the need for wiping work, allowing for efficient construction work.

[0037] Conventional chemical anchors (registered trademark) have the following shortcomings that need improvement: (1) it is difficult to determine the degree of adhesive filling in the hole; (2) it is necessary to fix the rod-shaped fastener in alignment with the center of the hole in the object to be fixed and allow it to harden and cure; and (3) when joining the fixing hardware after the adhesive has hardened, it is necessary to use a nut to prevent loosening (double nut or spring washer).

[0038] In contrast, with the joining method of the present invention, as described above, it is easy to check the filling status of the adhesive in the hole. Furthermore, with the joining method of the present invention, the fixing fitting 1 has the configuration described above, and the positions of the opening 21 of the cylindrical fastening member 2, the circular hole 31 of the fitting body 3, and the hole H of the object to be fixed W are aligned in advance. Therefore, when the rod-shaped fastener B is inserted downward from the opening 21 of the installed cylindrical fastening member 2, it can be inserted without shifting from the center of the hole H of the object to be fixed W. By hardening the adhesive in this state, the rod-shaped fastener B can be easily fixed to the center of the hole H of the object to be fixed W. Moreover, with the joining method of the present invention, the rod-shaped fastener B can be fixed by bringing its head b1 into vertical contact with the cylindrical fastening member 2 while it is inserted through the opening 21 of the cylindrical fastening member 2, so there is no need to use nut loosening prevention devices (double nuts or spring washers). In this way, the joining method of the present invention can solve all of the above problems of the conventional method, is easy to install, and can also reduce construction costs.

[0039] As described above, according to the fixing bracket and joining method of the present invention, for example, in GIR joining for wood or chemical anchor® joining for concrete, it is possible to easily determine whether or not adhesive is filled inside the hole of the object to be fixed (e.g., wood or concrete) into which the rod-shaped fastener is inserted.

[0040] The fixing bracket and joining method of the present invention are not limited to the embodiments described above. [Explanation of Symbols]

[0041] 1. Fixing bracket 2. Cylindrical fastening member 21 Opening 22 Notched grooves 3 Metal fittings B Rod-shaped connector b1 Head G Adhesive H hole W Fixed object

Claims

1. A cylindrical fastening member with an opening in the center, A metal fitting body having a flat plate portion with a circular hole, Includes, The cylindrical fastening member has a notched groove at one end, A fastening bracket in which one end of the cylindrical fastening member and one surface of the flat plate portion are fixed by welding at a position where the opening and the circular hole overlap, and the opening and the outside of the cylindrical fastening member are in communication through the notched groove.

2. The fixing bracket according to claim 1, wherein the cylindrical fastening member is a nut and the notched groove is provided at one end in the axial direction.

3. A method for joining an object to be fixed, a fixing bracket according to claim 1, and a rod-shaped fastener, The following steps: The first step involves injecting adhesive into a hole provided in the object to be fixed; A second step involves bringing the other surface of the flat plate portion of the fixing bracket into contact with the periphery of the hole, thereby aligning the positions of the opening of the cylindrical fastening member, the circular hole of the bracket body, and the hole of the object to be fixed; The third step involves inserting the rod-shaped fastener into the hole of the object to be fixed through the opening of the cylindrical fastening member and the circular hole of the metal fitting body, and then fixing the rod-shaped fastener and the object to be fixed with the adhesive. A joining method that includes this.

4. The joining method according to claim 3, wherein the third step includes determining whether or not the hole is filled with adhesive based on the presence or absence of adhesive flowing out from the notched groove of the cylindrical fastening member.

5. The aforementioned rod-shaped fastener has a head, The joining method according to claim 3 or 4, wherein in the third step, when the rod-shaped fastener is inserted to a predetermined depth in the hole of the object to be fixed, the head and the cylindrical fastening member come into contact in the vertical direction.

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