JP2000204655A - Reinforcing metal fitting for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a building reinforcing metal fitting capable of significantly enhancing reinforced strength as compared with reinforcing metal fittings of the prior art being easily positionable relative to wood, being so small in thickness that it does not hinder the application of plywood without the need to form a recess in a column or the like for storing the metal fitting therein, and having sufficient strength. SOLUTION: This reinforcing metal fitting is made to abut a sill 11 and a column 13 in such a way as to extend across the joint between the sill 11 and the column 13. In that case, the back 4 of the reinforcing metal fitting provided with projections 7 is made to abut the sill 11 and the column 13. All of the projections 7 are lightly driven in with a hammer and thus made to bite into the sill 11 and the column 13 so as to temporarily fasten the reinforcing metal fitting 1 in accurate positions on the sill 11 and the column 13. Next, wood screws 15 serving as locking members are driven into the sill 11 and the column 13 from through holes 5. After passing through the tbrough holes 5 and cavities 9 in the projections 7, the wood screws 15 bite into the sill 11 and the column 13 to secure the reinforcing metal fitting 1 to the sill 11 and the column 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing metal fitting for a building, and more particularly to a reinforcing metal fitting for a building which reinforces a connection between structural members such as a foundation, a pillar, and a beam of a wooden building.

[0002]

2. Description of the Related Art In recent years, there has been an increasing interest in the seismic resistance of wooden buildings, and reinforcing metal fittings are also attached to connecting portions of structural members such as bases, columns, beams and the like. This kind of reinforcing metal fitting has a metal plate as a metal fitting body in which a plurality of insertion holes through which fixing members such as nails and wood screws are inserted are formed.

[0003] The reinforcing metal fitting connects two pieces of wood to be connected in advance with a tenon, etc., and then abuts the metal plate so as to straddle the connected wood, and inserts a nail or the like into the insertion hole and cuts into the wood. Thus, the metal plate is fixed so as to straddle two pieces of wood, thereby reinforcing the connection of the wood. This type of reinforcing metal is made of a metal such as stainless steel and requires a certain strength or more, and thus has a thickness of 2 mm or more.

[0004]

However, since the above-mentioned conventional metal fittings are fixed only by nails or wood screws, the reinforcing strength is naturally limited. In addition, to attach the conventional reinforcing bracket to the wood, the reinforcing bracket should be abutted so as to straddle the two woods to be connected, hold the nail with one hand while holding it with one hand, and support it with the other hand. He used a hammer to drive nails into the wood through the holes. Therefore,
A great deal of skill was required to install the metal plate in the correct position.

Further, since the conventional reinforcing fitting has a thickness of 2 mm or more, a recess is formed in a pillar or the like to be reinforced, the reinforcing fitting is arranged in the recess, and a plywood is stretched over the structural material. I try not to get in the way. That is, since the conventional reinforcing metal fitting has a thickness of 2 mm or more, if it is directly attached to a side surface of a pillar or the like, a convex portion is formed, and it becomes impossible to stretch the plywood flat. For this reason, a concave portion for accommodating the reinforcing metal must be formed on a pillar or the like, and a laborious operation is required. On the other hand, merely reducing the thickness dimension of the reinforcing bracket causes a disadvantage that the strength is reduced.

[0006] The present invention has been made in view of the above-mentioned conventional problems, and can greatly improve the reinforcing strength as compared with conventional reinforcing metal fittings. The present invention provides a reinforcing metal fitting for a building having a small thickness and sufficient strength so as not to interfere with stretching a plywood without forming a concave portion in a pillar or the like and accommodating the concave portion. The purpose is to:

[0007]

In order to achieve this object, a reinforcing metal fitting for a building according to the present invention has been developed. The invention according to claim 1 has a metal fitting body contacting the wood, and a plurality of insertion holes formed in the metal fitting body and through which fixing members for attaching the metal fitting body to the wood are inserted, and the metal fitting body is connected. It is arranged so as to straddle a plurality of woods to be fixed, and the fixing member is fixed to the plurality of woods by inserting the fixing member into the insertion hole and driving the wood into the wood.
In a reinforcing metal fitting for a building that reinforces the connection of the plurality of timbers, a protruding portion in which a hollow portion is continuous with the insertion hole is provided on a side of the fitting body that comes into contact with the wood, for a building. It is a reinforcement fitting.

According to a second aspect of the present invention, in the reinforcing metal fitting for a building according to the first aspect, a thickness dimension of the metal fitting main body is:
It is a reinforcing metal fitting for buildings, which is 0.3 mm to 1.5 mm.

According to a third aspect of the present invention, there is provided a reinforcing metal fitting for a building according to the first or second aspect, wherein the projecting portion has a driving portion having a sharp tip. It is.

According to a fourth aspect of the present invention, there is provided a reinforcing metal fitting for a building according to the first or second aspect, wherein the projecting portion is provided with a driving portion having a sharp tip. It is.

According to a fifth aspect of the present invention, in any one of the reinforcing hardware for construction according to any one of the first to fourth aspects, the head of the fixing member is housed so that the fixing member does not protrude from the surface of the fitting body. A reinforcing metal fitting for construction, wherein a housing recess is formed in a metal fitting main body.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A reinforcing metal fitting 1 for a building according to the present invention will be described below with reference to the embodiment shown in FIGS. The reinforcing fitting 1 is a rectangular plate-shaped fitting main body 3.
, A plurality of insertion holes 5, and a protruding portion 7. The thickness of the metal fitting body 3 is about 0.5 mm, and the material is stainless steel. The fitting body 3 has 10
The individual insertion holes 5 are formed so as to penetrate the metal body 3. The insertion holes 5 are formed in the metal fitting body 3 at a sufficient interval from each other.

Reference numeral 4 denotes a surface of the metal fitting body 3 on the side in contact with a plurality of woods to be connected, that is, the back surface, and the surface on the opposite side represents the front surface 6. As shown in detail in FIG. 2, a protrusion 7 is provided at an edge of the insertion hole 5 on the back surface 4 of the metal fitting body 3. The protruding portion 7 is constituted by a base portion 8 and a driving portion 10 formed continuously with the base portion 8. The base portion 8 is formed in a cylindrical shape whose diameter gradually decreases as it goes to the tip. The driving portion 10 has a substantially cylindrical shape and is divided into four parts from the middle thereof, and the tip of the divided part is pointed. The internal space of the protruding portion 7 is a hollow portion 9. One end of the protruding portion 7 is open outward, and the other end is connected to and integrated with the metal fitting body 3. That is, the cavity 9 of the projection 7 is continuous with the insertion hole 5. A housing recess 3 for housing a head 15a of a wood screw 15 described later is provided on the front surface 6 side of the metal fitting body 3.
0 is formed. The accommodation recess 30 communicates with the insertion hole 5.

The thickness of the projection 7 is the thickest at the base 8,
It becomes thinner toward the tip of the driving portion 10.
Therefore, the driving portion 10 can easily bite into the wood. Further, the base portion 8 functions as a so-called rib for reinforcing the metal fitting body 3. The material of the protrusion 7 is the same as the material of the metal fitting body 3, and the protrusion height of the protrusion 7 is about 2 to 3 mm.

Next, a description will be given of a method of attaching the reinforcing bracket to wood. The base 11 and the pillar 13 to be connected are connected in advance by tenon joining (see FIG. 3). Reinforcement bracket 1
So that it extends over the connecting portion between the base 11 and the pillar 13, that is, five insertion holes 5 are located on the base 11 and the remaining 5
The base 11 and the pillar 13 are brought into contact with each other so that the individual insertion holes 5 are located on the pillar 13. At this time, the back surface 4 provided with the protruding portion 7 is in contact with the base 11 and the pillar 13.

Then, all the protrusions 7 are lightly driven with a hammer, so that the protrusions 7 bite into the base 11 and the pillars 13. Thereby, the reinforcing metal fitting 1 is stopped at the correct position of the base 11 and the pillar 13. Since the projecting portion 7 is provided with the driving portion 10, the projecting portion 7 can easily bite into the base 11 and the pillar 13 simply by tapping lightly with a hammer. The tip of the driving portion 10 is divided into four parts.
Although there are two cuts 12, the base 8 is formed between the base 3 and the metal fitting main body 3. Therefore, even if a crack may be generated from the cut 12, the crack propagates to the metal fitting main body 3. Can be prevented.

Next, a wood screw 15 as a fixing member is screwed into the base 11 and the pillar 13 from the insertion hole 5. After the wood screw 15 penetrates the insertion hole 5 and the hollow portion 9 of the protruding portion 7, the base 1
The reinforcement fitting 1 is fixed to the base 11 and the pillar 13 by biting into the pillar 1 and the pillar 13. Note that the thickness of the wood screw 15 is manufactured to a size that allows the wood screw 15 to be inserted into the hollow portion 9 of the projecting portion 7 with a very small gap. As shown in detail in FIG.
Is accommodated in the accommodation recess 30, so that the head 1
5 a does not project from surface 6.

Then, as shown in FIG. 3, the plywood 16 is put on the base 11 and the pillars 13. As described above, the thickness dimension of the metal fitting body 3 of the reinforcing metal fitting 1 is 0.5 mm, and the head 15 a of the wood screw 15 is housed in the housing recess 12 and does not protrude from the surface 6 of the metal fitting body 3. The size is 2.
Unlike the conventional reinforcing metal fitting having a length of 0 mm or more, a concave portion is formed in the base 11 and the pillar 13, and the plywood 16 is not obstructed even if it is not accommodated in the concave portion. That is, the fitting body 3
Does not hinder the plywood 16 being stretched. on the other hand,
The metal fitting body 3 has a driving portion 10 serving as a rib.
(Especially, the base portion 8) is formed and reinforced, and since the driving portion 10 cuts into the base 11 and the pillar 13, it has sufficient strength even if the thickness dimension is smaller than the conventional reinforcing metal fitting. Become.

As shown in FIGS. 3 and 4, the reinforcing metal fitting 1 abuts on the base 11 and the column 13 and is fixed, so that the connection between the base 11 and the column 13 is reinforced. The base 11 and pillar 13
The wood screw 15 and the protruding portion 7 bite into the base 11 and the pillar 13 almost vertically. A part of the wood screw 15 is housed in the protrusion 7.

If a force, such as a shearing force, is applied to one or both of the base 11 and the column 13 to break the connection between the base 11 and the column 13, a wood screw is applied to the protrusion 7. The stress occurs as in the case of FIG. In addition, wood screws 15
Prevents bending, ie, also serves to reinforce the wood screw 15. As described above, the thickness of the wood screw 15 is manufactured to a size that allows the wood screw 15 to be inserted with a very small gap therebetween, so that there is almost no play between the wood screw 15 and the protrusion 7.
The protruding portion 7 and the wood screw 15 integrally resist the force for breaking the connection.

As described above, in the reinforcing metal fitting 1, the protrusion 7 bites into the base 11 and the pillar 13, and the wood screw 15 itself is also reinforced by the protrusion 7, so that it is integrated with the force for breaking the connection state. Therefore, the reinforcing strength can be dramatically improved as compared with the conventional reinforcing hardware.

In an experiment, about 1.3 mm was used in comparison with a so-called Z hardware having a thickness of 2.3 mm, which has been conventionally used.
Demonstrated twice the strength. In this experiment, the base 11 was fixed, and the column 13 was pulled.
3 is separated.

Although the embodiment of the present invention has been described in detail above, the specific configuration is not limited to this embodiment, and there is a change in design without departing from the gist of the present invention. Are also included in the present invention. For example, in the embodiment, a simple rectangular plate is used as the metal fitting body, but a T-shape or an L-shape may be used depending on the connection mode.
Various shapes such as a letter shape can be used.

In the embodiment, two pieces of wood are connected, but the reinforcing metal fitting of the present invention can be used to connect more pieces of wood. The reinforcing fitting of the present invention may be used after being bent. Therefore, it is not necessary to align all of the surfaces of the plurality of wood pieces to which the reinforcing metal is abutted and fixed. Further, the tip of the protruding portion 7 does not have to be sharp. Furthermore, in the above-described embodiment, the driving portion 10 is divided into four parts in the middle, but may be formed so as to be divided into two, three, or five or more.

An insertion hole may be formed in accordance with the place where the reinforcing metal is used, and it is not necessary to provide the reinforcing metal uniformly in the metal body. Further, it is not necessary to provide the protrusions at the edges of all the insertion holes, and it is also possible to provide the protrusions only at the edges of some of the insertion holes. Further, it is not necessary to insert the fixing member into all of the formed insertion hole and the cavity of the protruding portion. Accordingly, it is possible to use a single type of reinforcing metal to connect a plurality of types of wooden buildings.

In the embodiment, the projecting portion is formed by burring the through hole of the metal fitting body, but may be formed separately and adhered to the edge of the through hole. Further, the projecting portion does not need to be cylindrical, and may have any shape as long as the fixing member can be inserted therethrough. Further, it is also possible to form the protruding portion directly on the metal fitting main body without providing the base portion.

In the above-described embodiment, the thickness of the metal fitting body is set to 0.5 mm. However, the present invention is not limited to this, and is appropriately adjusted within a range of 0.3 mm to 1.5 mm. be able to. In this case, the height dimension of the driving portion, the thickness dimension of the base portion, and the like are appropriately changed in accordance with the change in the thickness dimension of the metal fitting body.

In the embodiment, the timbers are previously tenoned and connected, and the reinforcing bracket of the present invention is used for reinforcement. However, the wood may be connected only by the reinforcing bracket of the present invention. Further, the material of the reinforcing metal is not limited to stainless steel, but may be iron or the like subjected to rust prevention treatment such as galvanization.
The fixing member is not limited to a wood screw, but may be a nail or the like. Furthermore, in the above embodiment, the reinforcing metal fitting is temporarily fixed using a hammer, but may be fixed with a wood screw or the like without performing the temporary fixing. Even in this case, the driving part is screwed with a wood screw,
If you nail it, it will cut into the wood.

[0029]

As described above, in the reinforcing metal fitting for a building according to the present invention, the reinforcing strength of the connecting portion between the woods can be remarkably improved. In addition, the reinforcing metal fittings for buildings according to the present invention can be easily attached to precise positions on wood. Further, the reinforcing metal fitting for a building according to the present invention can be easily driven into wood, and further, cracks do not propagate to the metal fitting body.

Further, the reinforcing metal fitting for a building according to the present invention has the punched portion, so that the thickness can be reduced while maintaining sufficient strength. Further, since the recess for accommodating the head of the fixing member is formed in the metal fitting main body, a concave for accommodating the reinforcing metal is not formed in the pillar and the beam, and can be attached to the side surface of the pillar and the beam. In addition, it is possible to omit a troublesome operation of forming a concave portion in a pillar or the like without obstructing a plywood.

[Brief description of the drawings]

FIG. 1 is a perspective view of a reinforcing metal fitting for a building according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a cross-sectional view of columns and beams reinforced with a building-use reinforcing bracket according to an embodiment of the present invention.

FIG. 4 is a partially enlarged view of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reinforcement metal fitting 3 Metal fitting main body 4 Back surface 5 Insertion hole 6 Surface 7 Projection part 8 Base part 9 Cavity part 10 Driving part 11 Base 13 Column 15 Wood screw 30 Housing recess

Claims (5)

[Claims] 1. A fitting main body which comes into contact with wood, and a plurality of insertion holes formed in the fitting main body and through which fixing members for attaching the fitting main body to the wood are inserted, the fitting main body should be connected. Arranged so as to straddle a plurality of wood, fixing the metal body to the plurality of wood by driving the fixing member through the insertion hole and driving the wood,
In a reinforcing metal fitting for a building that reinforces the connection of the plurality of timbers, a protruding portion in which a hollow portion is continuous with the insertion hole is provided on a side of the fitting body that comes into contact with the wood, for a building. Reinforcement bracket. 2. A reinforcing metal fitting for a building according to claim 1, wherein the thickness of the metal fitting body is 0.3 mm to 1.5 mm. 3. The reinforcing metal fitting for a building according to claim 1, wherein the projecting portion has a driving portion having a sharpened tip. 4. A reinforcing metal fitting for a building according to any one of claims 1 to 3, wherein the projecting portion is provided continuously with the base portion, the base portion being continuous with the metal fitting body, and the tip is pointed. A reinforcing metal fitting for a building, comprising: a driving portion; 5. The metal fitting body according to claim 1, wherein the holding recess for housing the head of the fixing member is provided so that the fixing member does not protrude from the surface of the metal fitting body. Reinforcing metal fittings for buildings, characterized by being formed in.