JP3349685B2 - Building hardware - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal frame for a wooden building constructed of columns, beams, and the like, and to a reinforcing hardware for increasing the strength of a joint portion and improving the structural strength. In particular, the present invention relates to a reinforcing metal fitting for an existing framed wooden building which can be installed at a corner from the inside of the building without breaking an outer wall of a reinforcing part of the building.

[0002]

2. Description of the Related Art The opinion that "earthquake damage to a timber framed building is greatly affected by the strength of the joint" is a consensus opinion among many wooden building researchers that the joint with the highest reliability is considered. As a means of improving strength, commonly known as "Z mark display hardware"
Japan Housing * Wood Technology Center called 197
The hardware specified in the "Hardware Standards for Frame Construction Method" established in 8 years, and similar hardware, and various hardware such as bracing plates, chevron plates, and corner plates are provided. It is well known that hole-down hardware is provided for mounting.

Further, Japanese Patent Application Laid-Open Nos. 8-302834 (hereinafter referred to as Prior Art 1), JP-A 8-338070 (hereinafter referred to as Prior Art 2) and JP-A 10-131295 (hereinafter referred to as Prior Art 3). Thus, an improved reinforcing bracket has been proposed.

[0004]

However, in many existing houses by the conventional framing method, the stiffness of the horizontal construction surface actually depends on a fired beam, and the fixing of the fired beam is also difficult. At present, bolts are loosened due to aging because of bolting, and the arrangement of fire beams is currently insufficient. Also, in the brace to increase the rigidity of the vertical construction, thick members cannot be expected, not only many buildings with insufficient wall volume ratio, but also the arrangement tends to be inappropriate, In particular, there is a striking difference between before and after the new seismic standards, and even in buildings after the new seismic standards, many buildings do not satisfy the amount and balance of load-bearing walls. In addition, since the above-mentioned brace plate, chevron plate, and corner plate are also hardware of tension members, they are joints of horizontal structures such as bases and girders and vertical structures, and are joints of braces. Reinforcement of the braces has many drawbacks and also has the disadvantage of being costly. The above-mentioned hole-down hardware is a hardware mainly used for fastening the column and the base, and is a metal on the premise of a tensile material. When mounting on the corners of the base and columns, reinforcement with foundations and anchor bolts is required. For this reason, there was a problem that it could not be used as reinforcing hardware for existing buildings without foundation work. As explained above, existing wooden buildings have insufficient bracing, loosened joint bolts due to aging, and lacked the number of conventional reinforcing hardware. Even if it is necessary to reinforce the part where the strength is insufficient, there is a problem that the outer wall is broken, a scaffold is assembled, and the cost becomes high, and the reinforcing work becomes difficult in terms of cost.

[0005] Further, the prior art 1 has a structure in which the number of nails and coach bolts for attachment is large, the number of construction steps is increased, and a side plate portion in contact with wood is welded after bending. In addition, the cost of the bracket is high because the rubber plate is attached, and furthermore, since the triangular plate portion is a single plate, the edge portion is weak against compression buckling, and the weight is increased, so that it is under the floor. And it is not suitable for work in narrow spaces behind the ceiling. In Prior Art 2 and Prior Art 3, weight reduction and countermeasures against compression buckling of the triangular plate portion are taken. However, the metal fittings are basically applied to newly constructed houses, and the triangular plate is provided on both sides. Department
Installation bolt installation in the space sandwiched by this is necessary,
Construction is very difficult to apply to an existing house, and there is a problem that it cannot be applied as a metal fitting for reinforcing an existing house in reality.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a web portion having a substantially right triangle shape.
By giving this web part a flange overhang, not only pulling, but also compressive bending buckling strength is improved, and in existing framed wooden buildings, the amount of bracing, unbalance of load-bearing walls, or relaxation of joints is reduced. On the other hand, an object of the present invention is to provide a reinforcing metal fitting for a building that can reinforce a corner from the inside of a building without breaking an outer wall of the building.

[0007]

In order to solve the above-mentioned problems, a reinforcing metal for a building according to the present invention (claim 1) is provided at a corner along a corner of a framed frame constructed of columns, beams and the like. A web portion and a hypotenuse web portion connected to both ends of the corner web portion are formed in a substantially right triangle shape, and an outer flange perpendicular to the corner web portion is integrally formed along an outer edge of the corner web portion. Formed at the corners of this outer flange
A convex curved surface is formed with a radius of curvature at
A reinforcing metal fitting attached so that an outer surface of the flange comes into contact with the framing frame at a corner, wherein an inner flange perpendicular to the corner web portion is formed integrally along the inner edge of the corner web portion, and the hypotenuse A hypotenuse portion flange perpendicular to the web portion is formed integrally along both edges of the hypotenuse web portion, and the hypotenuse portion flange is formed integrally with the inner flange so as to be continuous with the inner flange. The configuration was such that the height of the flange and the inner flange was lower than the height of the outer flange.

In this reinforcing metal, a rib portion is formed to project inward from a mounting hole forming portion of the outer flange, and a mounting hole is formed in the rib portion (claim 2). There is a mode (claim 3) in which the height is formed higher than the height of both ends.

In the present invention, the surface that contacts the column or the beam is referred to as an outer flange, the surface perpendicular to the outer flange is referred to as a web portion, and the side opposite to the outer flange is referred to as an inner flange. .

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a reinforcing hardware according to the first embodiment. In this embodiment, the base 10
The reinforcing hardware 2 is applied to the corners of the horizontal construction surface, which is the joint between the pulley 11 and the puller 11. The reinforcing hardware 2 is integrally formed from a metal plate such as steel or stainless steel.
A substantially right-angled triangular shape having a corner web portion 31 along the corner and a hypotenuse web portion 32 continuously provided at both ends of the corner web portion 31 so as to form a triangular hole 30 between the corner web portion 31. Is formed. An outer flange 4 perpendicular to the corner web portion 31 is formed along the outer edge of the corner web portion 31 by integral molding.
An inner flange 5 perpendicular to the corner web portion 31 is formed integrally along the inner edge of the corner web portion 31, and a hypotenuse flange 6 perpendicular to the hypotenuse web portion 32 is formed on both edges of the hypotenuse web 32. Along with the inner flange 5 along the inner flange 5. The height h3 of the oblique side flange 6 and the height h2 of the inner flange 5 are lower than the height h1 of the outer flange 4 (h3 and h2 <h).
1) Formed. The heights h1, h of the flanges
2 and h3, as shown in FIG. 3, refer to the height excluding the thickness t of the web portion. And this reinforcing metal 2
The outer flange 4 is mounted so as to abut on a column or a beam. The outer flange 4 has a mounting hole 41 for a coach screw, and has a radius of curvature at a corner.
Thus, a convex curved surface 40 is formed.

In general, a reinforcing material called fire is attached to the corners where the wood is orthogonal, but it is easy to attach the reinforcing hardware 2 as shown in this figure to a portion of an existing building where there is no fire. Can be installed in In addition, by stopping the reinforcing hardware 2 with a coach screw (not shown),
It is also effective against deformation in which a tensile force acts, and is very effective for reinforcement during an earthquake. When FIG. 1 is viewed vertically, the reinforcing hardware 2 is attached to the corner of the vertical surface, which is the joint between the column and the beam, and the rigidity of the vertical surface, that is,
Since the load-bearing wall rigidity is increased, it is possible to increase the strength against the horizontal force of the earthquake.

In either the horizontal or vertical mounting, a compressive bending force is applied to the reinforcing hardware 2 against shaking during an earthquake, and the strength against this is most important.

[0013] Furthermore, the main purpose of the reinforcing hardware is to reinforce the corners, especially to enhance the collapse resistance against shaking during an earthquake, and to provide the function as a bearing wall at the corners of the columns and beams. In this state, the buckling strength of the web or flange of the reinforcing hardware 2 is the most important index of the strength of the member. Note that the balance with the yield point of the material is also important, and it is reasonable that the yield ratio does not exceed the yield point and the strength ratio between the yield strength and the buckling strength is substantially the same.

FIG. 2 is a perspective view showing a reinforcing metal according to a second embodiment. In order to improve the local strength of the coach screw mounting portion, the reinforcing metal 2 has a rib portion 42 projecting inward from a mounting hole forming portion of the outer flange 4, and a mounting hole 41 is formed in the rib portion 42. Things. When the metal part is pulled, the mounting part of the coach screw is liable to bend up due to partial bending. Therefore, it is desirable to increase resistance to the bending. As the most effective method, the rib part 41 is provided on the outer flange 4 inward. It is formed.

Since the central portion of the oblique web portion 32 is the weakest in terms of the buckling strength, the central portion m of the oblique side flange 6 is m.
Is formed to be higher than the height h3 of both ends. In this case, a screw-in work tool (electric wrench, etc.) to stop the coach screw in connection with workability
It is preferable to reduce the height of both ends of the hypotenuse flange 6 and increase the height of only the central part m so as not to interfere with the requirements of both workability and buckling strength. In addition, since the corners of the triangular hole 30 are provided with the radius, the adverse effect of stress concentration is almost eliminated, and the strength is substantially improved.

Although the embodiment of the present invention has been described with reference to the drawings, the specific configuration is not limited to this. For example, it is needless to say that the present invention is also effective when a web portion is provided with a rib portion for improving strength, or when the present invention is applied to metal fittings in which mounting holes for coach screws and screw nails are different from those described in the present example. .

[0017]

According to the present invention having the above-described structure, it can be provided as a reinforcing hardware not only for tension but also for bending and compression, and horizontal force due to seismic force or wind force is applied to a building. At the time, it can be installed as reinforcement of the corner that has become loose due to aging of the frame. In particular,
By providing at the upper and lower corners of the opening without brace,
The corners of wooden buildings built with conventional construction methods by providing resistance to bending forces and providing them in places where braces are insufficient, where braces are difficult to attach, and where tension is weak. The part can be hardened and the joint can have bending resistance. In addition, in the horizontal structure of the existing building, the battering beam is reinforced, and in the vertical structure, the bracing is supplemented, the imbalance in the amount and arrangement of the load-bearing walls is corrected, and the building is converted to a solid building. In addition, the reinforcing hardware of the present invention can be easily applied as a reinforcing material to an existing building, and in the reinforcing work, a scaffold is not built or an outer wall is not removed. Since the construction can be performed from the beginning, there are advantages that the construction cost is low and that partial reinforcement is possible.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a reinforcing hardware according to a first embodiment.

FIG. 2 is a perspective view showing a reinforcing hardware according to a second embodiment.

FIG. 3 is an explanatory diagram for defining a flange height.

[Explanation of symbols]

 2 Reinforcement hardware 31 Corner web part 32 Bevel side web part 4 Outer flange 5 Inner flange 6 Bevel side flange 40 Convex curved surface m Central part

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E04B 1/26 E04B 1/38-1/60

Claims (3)

(57) [Claims] 1. A corner web formed along a corner of a framing frame constructed of columns, beams and the like, and oblique webs connected to both ends of the corner web are formed in a substantially right triangle shape. An outer flange perpendicular to the corner web portion is integrally formed along the outer edge of the corner web portion, and a convex curved surface having a radius of curvature is formed at a corner of the outer flange.
And a reinforcing member attached so that the outer surface of the outer flange abuts on the frame at the corner, and an inner flange perpendicular to the corner web portion is integrally formed along the inner edge of the corner web portion. A hypotenuse flange perpendicular to the hypotenuse web portion is formed by integral molding along both edges of the hypotenuse web portion, and is integrally molded so that the hypotenuse flange is continuous with the inner flange. A reinforcing metal fitting for a building, wherein the height of the oblique side flange and the inner flange is formed lower than the height of the outer flange. 2. The reinforcing metal fitting for a building according to claim 1, wherein a rib portion protrudes inward from a mounting hole forming portion of the outer flange, and a mounting hole is formed in the rib portion. 3. The reinforcing metal fitting for a building according to claim 1, wherein the height of the center of the oblique side flange is higher than the height of both ends.