JP3040650U - External type seismic reinforcement braces for existing wooden houses - Google Patents

Abstract

(57) [Abstract] [Problem] To provide a brace hardware for reinforcing a seismic retrofit by externally attaching a bearing wall of an existing wooden house from an outer surface of a finishing material. SOLUTION: This seismic reinforcing brace hardware is a joining hardware that is externally attached to a beam-column joint of a house, and a bracing material that is tightly coupled to the joining hardware so that stress can be transmitted through a connecting hardware. It consists of a combination of. In the joint hardware, a shaft restraint portion having a through hole through which a support shaft member fixed to a pillar or a beam is inserted is provided at a substantially center of an outer surface side of a seat portion fixed to a pillar-beam joint of a house. . The connection metal piece is connected to a support shaft material fixed to a pillar or a beam of an existing wooden house by using the connection metal piece, and has a receiving portion for tightly connecting a brace material to an end portion thereof. The brace material is provided at its end with means for tightly binding to the receiving portion of the connecting metal object, and also with a mechanism capable of introducing tension.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention is a technical field of a brace metal for aseismic reinforcement by externally attaching a bearing wall, a beam-column joint, or a column base of an existing wooden house from the outer surface of a finishing material such as a wall as a permanent measure. Belong to.

[0002]

[Prior art]

 Considering that the damage of the existing wooden houses that were deteriorated was particularly remarkable in the aftermath of the Kobe earthquake, development of seismic retrofitting structures and seismic retrofitting metalwork are being actively pursued in various fields as an unexpected earthquake countermeasure. The seismic retrofitting technology for wooden houses is broadly divided into foundation reinforcement, foundation reinforcement, column reinforcement, girder reinforcement, wall and bracing reinforcement, and roof structure reinforcement.

[0003]

[Problems to be solved by the present invention]

 A first object of the present invention is to mainly perform seismic retrofitting of bearing walls, beam-column joints, or column bases directly from the outside of an existing wooden house, in other words, the exterior surface of a finishing material such as a wall of a house. The purpose is to provide an external seismic reinforcement brace hardware that can be externally attached and reinforced.

The second object of the present invention is to enable seismic reinforcement work without any modification to the finishing material of the outer wall of an existing wooden house, and to selectively use the constituent elements. It is an object of the present invention to provide an external type seismic reinforcement bracing hardware capable of performing seismic reinforcement in various modes.

[0005]

[Means for Solving the Problems]

 As a means for solving the above-mentioned problems, the invention according to claim 1 relates to a brace hardware for externally attaching seismic reinforcement to the beam-column joint of an existing wooden house from the outer surface of a finishing material. The joining hardware is externally attached to the joining portion, etc., and the joining hardware is a combination of a brace material that is tightly coupled so that stress can be transmitted through the connecting hardware. A shaft restraint with a through hole through which a support shaft member to be fixed to a pillar or a beam is projected is provided at approximately the center of the outer surface side of the seating part that is fixed to the etc. The metal fitting is connected to a support shaft member fixed to a pillar or beam of an existing wooden house by using the above-mentioned metal fitting, and has a receiving portion for tightly connecting the brace material at its end. The material is a hand that is tightly attached to the receiving part of the connecting metal object Comprising a, and respectively, characterized in that the introduction of the tension has a mechanism capable.

According to a second aspect of the present invention, in the joining metal article according to the first aspect, the seating portion is formed by removing a core slightly larger than the outer shape of the seating portion in a finishing material such as a beam-column joint portion of an existing wooden house. Is to be in direct contact with the outer surface of the column or beam, and is fixed with multiple wood screws. According to a third aspect of the present invention, the connecting metal piece according to the first aspect is provided with a cylindrical member through which a brace material is passed at an end portion of a flat steel plate as a receiving portion, and has a hole for connecting with a support shaft material. The bracing material has a male thread on its end, and a nut is screwed into the male thread from the opposite side to the male thread that has passed through the tubular object, and the fastening force introduces a pre-tensioning force of the size required for the brace material. It is characterized by being tightly bound.

[0007]

Embodiments and Examples of the Invention

 The external type seismic strengthening brace hardware according to the invention as claimed in claim 1 is used for external seismic strengthening by externally attaching a finishing material to a beam-column joint or the like as necessary for seismic strengthening of an existing wooden house. Is preferably applied and implemented. Since seismic retrofitting work can be performed without modifying the finishing materials such as the walls of the existing wooden house, the work required for construction is short, the work can be done in a short period of time, and the existing house can be used without any hindrance.

This seismic reinforcement brace hardware is implemented as a seismic reinforcement brace for a bearing wall of an existing wooden house, as shown in a standard embodiment in FIGS. 1 and 2. A metal fitting and a supporting member are respectively provided at the substantially central positions of the joints A and B of the pillar 1 and the beam 2 corresponding to the four corners of the load bearing wall 10 and the substantially central positions of the joints C and D of the pillar 1 and the base 3. It is fixed and two braces 5 are attached to the outside of the finish 4 such as a wall so as to intersect in a diagonal direction.

An example of the joint metal 6 is shown in FIGS. 3 and 4, and an example in which the joint metal 6 is fixed to a beam-column joint or the like of an existing wooden house is shown in FIGS. 5 and 6. The metal fitting 6 includes a seating portion 6a that is fixed to a beam-column joint or the like with a plurality of wood screws 7, and a cylindrical shaft restraining portion 6b that is provided at a substantially central position on the outer surface side of the seating portion 6a. , And reinforcing ribs 6c radially arranged in four directions at right angles to stiffen the shaft restraint portion 6b. The shaft restraint 6 having a cylindrical shape with an outer diameter of about 35 mm has a through hole 6d through which the screw joint material 8 for wood, which is a supporting shaft material to be screwed into the pillar 1 or the beam 2 sufficiently deeply and fixed, as shown in FIG. Is also provided as a hole having a diameter of about 16.5 mm that also penetrates through the seat 6a. The wood screw joint material 8 as a supporting shaft material has a large outer diameter of 16 mm and a length of about 160 mm so that it can be used as a seismic strengthening element, and a self-tapping screw can be cut in the length range of about 1/2 of its front half. It is a structured structure and is generally called a lag screw. However, the support shaft material is not limited to the wood screw joint material 8 described above, but known anchor bolts, for example, a resin capsule is loaded into a pilot hole drilled in the beam 2 to embed anchor bars or anchor bolts. It is also possible to use a fixed so-called resin anchor. This point is common to the following examples. The seating portion 6a of the metal fitting 6 is made of a zinc-plated steel plate having an outer diameter of 100 mm and a thickness of about 9 mm, and a hole for a wood screw with a diameter of about 5.5 mm on a line with a radius of about 38 mm. About 12 are provided at an equal pitch. As the wood screw 7, a screw having an outer diameter of about 5 mm and a length of about 70 mm is used.

In the embodiment shown in FIGS. 5 and 6, the metal fitting 6 has a mounting hole 11 with a straight diameter of about 120 mm, which is core-drilled in the finishing material 4 of an existing wooden house, and is seated in the mounting hole 11. The portion 6a is firmly fixed to the outer surface of the beam 2 with a plurality of wood screws 7. A sealing material 12 is filled in the gap between the mounting hole 11 and the joint metal 6 as a rain barrier.

The brace material 5 is installed through the connecting metal piece 13. The connecting hardware 13 shown in FIGS. 5 and 6 is made of a zinc-plated flat steel plate having a length of 300 mm, a width of 40 mm, and a thickness of 5 mm, and the shaft portion of the wood screw joint material 8 is fitted therein. It has a hole 13a having a diameter. The wood screw joint material 8 is connected to the hole 13a, and then the wood screw joint material 8 is screwed and fixed to the beam 2 through the through hole 6d of the shaft restraint portion 6b of the joint metal 6. . When the wood screw joint material 8 is used, a leading hole having a diameter of 40 to 70% of the screw diameter is preliminarily provided in the beam 2 with a drill, and the wood screw joint material 8 is turned along the lead hole. While screwing in firmly. At one end of the connecting metal piece 13, a cylindrical receiving portion 14 for connecting the brace material 5 is fixed by welding in the longitudinal direction of the connecting metal piece 13.

The brace member 5 shown in the drawing is made of a galvanized steel rod having an outer diameter of about 16 mm, and an external thread 15 is machined at the end portion thereof in a length range necessary for tight binding. The brace material 5 is attached by passing the end portion through the hole of the receiving portion 14 of the connecting metal piece 13 and screwing the nut 16 from the opposite side. Depending on the strength with which the nut 16 is tightened, it is possible to perform the tightening by introducing an appropriate pre-tension, and thus achieve the purpose of seismic strengthening of the column-beam joints A, B or the column bases C, D, and eventually the bearing wall 10. There will be things to do.

Next, FIG. 7 and FIG. 8 show that the brace members 5 are arranged in parallel in the vertical direction along the columns 1 and applied to the column-beam joints A, B and the column bases C, D for seismic reinforcement. An example is shown. Also in the case of the present embodiment, the contact alloys are fixed to the column-beam joints A and B and the column bases C and D of the existing wooden house, and the wooden screw joint material 8 serving as the support shaft material is fixed to this. The attachment of the brace material 5 to the outside of the finishing material 4 via the connecting metal piece 13 is common to the above-described embodiment.

In the case of the present embodiment, as shown in FIGS. 9A and 9B, connecting metal members 18 having a vertically symmetrical structure are used for the beam-column joints A and B. The connecting metal piece 18 has a structure in which the central portion is connected to the wooden screw joint material 8 and the cylindrical receiving portions 14 through which the brace material 5 is inserted are fixed to both upper and lower ends. The ends of the brace members 5 arranged vertically along the pillars 1 are passed through the receiving portions 14 of the connecting hardware 18, and the nuts 16 are screwed in from the opposite side and strongly tightened to introduce pretension. As a result, seismic strengthening of the column-beam joints A and B, especially against pulling, is achieved.

On the other hand, as shown in FIG. 5 and FIG. 6, the connection hardware 20 of the lower column bases C and D is configured to have a receiving portion 14 only at the upper end and has a required length. It is used. A lower end portion (male) of the brace member 5 arranged downward from above is tightly connected to the receiving portion 14 with a nut. An anchor bolt 22 attached to the foundation 21 is connected to the lower end side of the connecting hardware 20. The anchor bolt 22 is prepared by a known hole-in anchor or the above-mentioned resin anchor. The column bases C and D also have a proper amount of pretension introduced into the brace member 5 to achieve seismic reinforcement especially against pulling.

As another embodiment, the brace structure of FIGS. 1 and 2 described above and the seismic reinforcement structure of the brace material parallel to the pillar 1 shown in FIGS. 7 and 8 are used in combination. I can do it. In that case, it is possible to use a bifurcated modification as the connecting hardware, but the above two types of connecting hardware 13 and 18 are connected to the shaft of the wood screw joint material 8 in an overlapping state. You can do it.

[0017]

[Effects of the present invention]

 The external type seismic reinforcement braces of an existing wooden house according to the present invention are mainly used for seismic reinforcement of load bearing walls, beam-column joints, column legs, etc. from the outside of the existing wooden house, that is, the walls of the house. It can be externally attached from the outer surface of the finishing material to provide strong seismic reinforcement. Since it is possible to perform seismic retrofitting work without modifying the outer wall of existing wooden houses at all, seismic retrofitting work can be performed relatively easily and inexpensively in a short construction period, and each component (column It is convenient because various kinds of seismic reinforcement can be performed by selectively using metal fittings, metal fittings for beams, and metal fittings for corners.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment in which a seismic reinforcement brace hardware according to the present invention is used in a brace structure.

FIG. 2 is a side view of FIG.

FIG. 3 is a side view of a metal joint.

FIG. 4 is a front view of a metal joint.

FIG. 5 is a front view showing an attached state of a metal joint.

FIG. 6 is a side view of FIG. 5;

FIG. 7 is a front view showing another embodiment of the seismic reinforcement brace hardware according to the present invention.

FIG. 8 is a side view of FIG. 7;

FIG. 9A and FIG. 9B are a front view and a side view showing a connecting metal piece in use.

[Explanation of symbols]

 A Column-beam joint B Column base 4 Finishing material 1 Column 2 Beam 6 Joining hardware 13 Connecting hardware 18 Connecting hardware 5 Brace material 7 Wood screw 6a Seating part 8 Shaft material (wood screw connecting material) 16 Through hole 6b Shaft Supporting part 14 Receiving part 15 Male screw 16 Nut

Claims (3)

[Utility model registration claims] Claims: 1. A brace hardware for externally attaching to a beam-column joint or the like of an existing wooden house from the outer surface of a finishing material for earthquake-proof reinforcement, and a metal joint externally attached to the beam-column joint or the like of a house, It is composed of a combination of the joint metal and a brace material that is tightly coupled so that stress can be transmitted through the connecting metal, and the joint metal is a seating portion that is fixed to a beam-column joint of a house by a plurality of wood screws or the like. Is a structure in which a shaft restraint portion having a through hole through which a support shaft material fixed to a pillar or a beam is projected is provided substantially at the center on the outer surface side of the existing wooden house by using the joining hardware. Is connected to a support shaft member fixed to a pillar or a beam, and is configured to have a receiving portion for tightly binding a brace material to an end thereof, the brace material being a receiving portion of the connecting metal object at an end thereof. It is equipped with a means for tightening the DOO, respectively, wherein, external Shear reinforcing brace hardware of existing wooden houses. 2. The joining hardware according to claim 1, wherein a hole is formed in a finishing material such as a beam-column joint portion of an existing wooden house, and a hole having a diameter slightly larger than the outer diameter of the seating portion is cored out so that the seating portion directly has a pillar or beam. External seismic reinforcement braces for existing wooden houses, characterized in that they are in contact with the outer surface of the building and are fixed with multiple wood screws. 3. The connecting metal piece according to claim 1, wherein a tubular member through which a brace material is inserted is provided as an receiving portion at an end portion of a flat steel plate, and has a hole for connecting with a support shaft material, and the brace material is A male screw is machined at the end, and a nut is screwed into the male screw from the opposite side to the male screw passed through the tubular member, and the tightening force introduces a pre-tension of a necessary amount to the brace member for tight connection. External seismic reinforcement braces for existing wooden houses.