JPH09158332A - Reinforcing structure and part for tenon connection in wooden building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide improved earthquake resistance by driving a cotter pin composed of a metal bar covered with rubber into a through hole formed through a sill and tenon protrusion to reinforce a connection structure of a wooden building by means of a tenon. SOLUTION: A tenon protrusion 21, a second member, projected from the lower end of a column 2 is fitted into a mortice 11, as a first member, formed in a sill 1. Next, through holes 12A, 21A, 12B are successively formed through the sill 1 and tenon protrusion at a connection part of the sill 1 and column 2. On the other hand, a cotter pin 3, as a reinforcing fitting, in which a rust- proof treatment is applied onto an iron bar by means of rubber coating, is prepared. And the cotter pin 3 is driven into the through holes 12A, 21A, 12B formed through the sill 1 and tenon protrusion 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for reinforcing a tenon connection used for connecting columns and beams in wooden construction.

[0002]

2. Description of the Related Art Conventionally, a tenon joint used for connecting a pillar and a beam in a wooden construction is one in which a tenon protrusion formed on a first member such as a pillar is formed on a second member such as a beam or a base. The first member and the second member are joined by being fitted in the formed mortise. In order to reinforce such a tenon joint structure, a bar-shaped member has been penetrated through the joint portion as a conventional technique. This rod-shaped member is called a spigot (Komisen), and oak, which is a hard wood, was used.

However, in modern construction techniques, it is more common to use a metal reinforcing plate than to use a wooden komisen. For example, in the Building Standards Law, in order to prevent the joint between the column and the base from coming off due to the impact of an earthquake, a T-shaped metal fitting is nailed to the joint between the pipe column and the base, and the joint between the pipe column and the girder. It is instructed to reinforce the joints by striking L-shaped metal fittings on the through columns located at the corners of the building, and also striking metal fittings on the braces. And in the building inspection of the Housing Finance Corporation,
Installation of these metal fittings is one of the important inspection targets.

In the Great Hanshin-Awaji Earthquake on January 17, 1995, the pillars were removed from the base due to the shock (vertical shaking) of the earthquake received from directly below, and the building was collapsed or tilted. It was In addition, since the brace was pulled out from the installation part due to the severe rolling, it often stopped working as a brace, leading to collapse and inclination of the building.

Therefore, the inventor conducted an experiment on seismic resistance with respect to Komisen, which has been an ancient tradition, and T-shaped metal fittings in the Building Standards Act. According to the experimental results, the pulling-out strength of T-shaped metal fittings is at least 1,002kg, the highest
In contrast to 1,047 kg, Komisen made from oak wood had a minimum proof stress of 1,295 kg and a maximum of 1,523 kg. In addition, the width of the proof stress is the difference in the dry state of the wood and the length of the tenon,
It is also likely due to the difference between domestic cypress and imported timber. In addition, other reinforcing means such as "Hell tightening" using a wedge and winding rubber on the tenon had a lower yield strength.

From the results of this experiment, it was possible to confirm the excellent reinforcing ability of Komithene.

[0007]

However, in the conventional Komisen, no matter how hard an oak tree is used, after all, since it is a tree, it cannot be expected to have a proof strength higher than the above. Therefore, the inventor has made the present invention in order to make Komisen, which is superior to metal fittings, a Komisen that can obtain higher yield strength.

[0008]

That is, according to the present invention, the tenon protrusion formed on the first member is fitted into the tenon hole formed on the second member, and the tenth member and the second member are inserted. In the joint structure by tenon, which is configured to connect the member and penetrate the rod-shaped reinforcing tool through the joint part to prevent the tenon from coming off, the reinforcing tool is a rustproof rigid member. It was a high metal reinforcement.

Further, the reinforcing tool is preferably made of an iron rod which is rust-proofed by a rubber coating.

The anticorrosion treatment is not limited to the rubber coating but may be a treatment such as painting or coating. Also, the reinforcement is
An alloy or the like can be used as long as it is a metal having high rigidity such as iron. For example, stainless steel provides rust resistance for some period of time. Further, the reinforcing tool is not limited to the cylindrical shape, but various polygonal pillar shapes are possible.

Further, the connecting portion between the first member and the second member is not limited to a right angle, but may be connected obliquely like a bracing.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIG. In FIG. 1, 1 is a base as a first member, and 2 is a pillar as a second member. The base 1 is provided with a mortise hole 11 and through holes 12A and 12B penetrating the portion of the mortise hole 11.

At the lower end of the pillar 2, a tenon projection 21 is provided so as to project, and the tenon projection 21 is provided with a through hole 21A. Reference numeral 3 denotes a rod-shaped komisen as a reinforcing tool according to the present invention, and as shown in FIG. 2, a rubber coating 32 is attached to the surface of an iron rod 31. The iron rod 31 has a diameter of 15 m
The length of the rubber coating 32 is m, the length is 90 mm, and the thickness of the rubber coating 32 is 1.5 mm. That is, the diameter of Komisen 3 is 18 mm.

When the pillar 2 is joined to the base 1, the tenon 21 of the pillar 2 is fitted into the tenon hole 11 of the base 1. In addition, a through hole with a diameter of 18 mm is drilled by a drill, and the through hole 12A,
Provide 12B and 21A. Then, through the hole
The tenon joint is reinforced by driving into the 12A, the through hole 21A, and the through hole 12B.

In this way, the proof stress of the joint portion reinforced by Komisen 3 is 1,930 kg when the first member and the second member are cypress, which is even better than that of oak tree Komisen. The yield strength was obtained. According to Komisen 3 in FIG. 2, T
It is stronger than the letter-shaped metal fittings, and stronger than the oak wood komisen.

In addition, the reinforcing work can be performed much more efficiently than the conventional T-shaped metal fitting.

Since Komisen 3 of the present invention is made of metal, a high pulling proof strength of 1,930 kg can be obtained.
Such high proof stress is not only due to the fact that it is made of metal, but also due to the fact that the rubber coating applied for anticorrosion treatment causes a large frictional resistance with the inner wall of the through hole of the column. Seems to be.

[0018]

According to the tenon joint reinforcing structure in the wooden construction of the invention of claim 1, the metal reinforcing member makes it difficult for the tenon joint structure to come off, and the vertical force such as vertical shaking of an earthquake is generated. Even if it is applied, it is possible to obtain the effect that it is difficult for the building to collapse or incline.

According to the reinforcing tool of the invention of claim 2,
The rubber coating causes a large frictional resistance and further excellent pull-out resistance. In addition to such earthquake resistance,
Like a conventional T-shaped bracket
Since it is not necessary to hit a large number of nails in a book, extremely efficient work becomes possible.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of a tenon-bonded reinforcing structure in a wooden construction of the present invention.

FIG. 2 is a side sectional view of an embodiment of the reinforcing tool of the present invention.

[Explanation of symbols]

 1 1st member, base 11 Mortise 12A through hole 12B through hole 2 Second member, pillar 21 Mortise protrusion 21A through hole 3 Reinforcing tool, Komisen 31 Iron bar 32 Rubber coating

Claims (2)

[Claims] 1. A tenon protrusion formed on a first member
The first member and the second member are connected to each other by fitting them into a mortise formed in the member, and a rod-shaped reinforcing tool is passed through this connecting portion to prevent the tenon from coming off. In the joint structure by the tenon, the tenon joint reinforcing structure in a wooden construction, wherein the reinforcing member is a reinforcing member made of rust-proof metal having high rigidity. 2. A reinforcing tool for use in a reinforcing structure according to claim 1, wherein an anticorrosion treatment layer formed by rubber coating is formed on an iron rod.