JP2023099376A - Beam joint structure - Google Patents

Abstract

To solve the problem in which a preparation of a long beam material is restricted in terms of manufacturing or transportation.SOLUTION: A beam joint structure comprises: a wooden first beam material in a square columnar shape; a wooden second beam material having the same cross sectional shape as the first beam material; a first L-shaped member covering a part of two side surfaces adjacent across both of the beam materials in the state where one cross section of the first beam material and one cross section of the second beam material are abutted each other; a first coupling member penetrating the opposing side surface of one of the first beam material and the second beam material via one surface of the first L-shaped member and coupling both of the beam materials and the first L-shaped member; and a second coupling member penetrating the opposing side surfaces of one of the first beam material and the second beam material via the other surface of the first L-shaped member and coupling both of the beam materials and the first L-shaped member.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a beam joint structure for joining beams of a wooden building, and more particularly to a beam joint structure using hardware.

In a wooden building, columns are erected and beams are crossed to form a beam-column framework. In many cases, braces are added to the column-to-beam framework in consideration of structural strength, and wall panels are inserted in the two-by-four construction method to prevent the framework from deforming significantly. If this framework is rigidly connected, braces and wall panels are not required, and openings for entrances and windows can be made large or provided in large numbers. In other words, if rigid joints of frameworks can be achieved, a structure equivalent to or close to that of a steel-framed building can be achieved in spite of being a wooden building.

For example, in a building structure described in Patent Literature 1, it is described that a rigid joint can be formed by sandwiching and fixing a column and a beam with L-shaped hardware from above and below. With such rigid joints, it is possible to extend the length of the beam.

Japanese Patent No. 6814498

By the way, in a building structure such as that of Patent Document 1, since the beams can be extended long, even if an attempt is made to prepare long beams, there is a limit due to manufacturing and transportation problems.

However, if beams of conventional length can be connected and spliced, the problems of manufacturing and transporting beams will be solved. Therefore, the present inventor developed a beam joint structure in which wooden beams are firmly joined using metal fittings.

(1) A beam joint structure according to the present invention includes a square prism-shaped wooden first beam, a wooden second beam having the same cross-sectional shape as the first beam, and the first beam. a first L-shaped member that covers a part of two adjacent side surfaces across both beam members in a state where one cross section of the second beam member is in contact with one cross section of the second beam member; through one side of the L-shaped member of the first beam member and the second beam member facing one of the side surfaces, and connecting the both beam members and the first L-shaped member and one of the opposing side surfaces of the first beam and the second beam through the other surface of the first L-shaped member, and the both beams and the first and a second connecting member that connects the L-shaped members.

(2) A second L-shaped member covering a part of two side surfaces different from the two side surfaces of the beams covered by the first L-shaped member, wherein the first connecting member Through one surface of the L-shaped member and one surface of the second L-shaped member opposed to each other, one of the opposing side surfaces of the first beam and the second beam is penetrated, and the A second coupling member connects the first beam member and the second beam member via the other surface of the first L-shaped member and the other surface of the second L-shaped member facing each other. 2. The beam joint structure according to claim 1, passing through the other opposite side of the .

A first plate member that covers one side surface different from the two side surfaces of the beam members covered by the one L-shaped member, and a plate member that covers the other side surface that is different from the two side surfaces of the beam members covered by the one L-shaped member. and a second plate member covering one side surface, wherein the first coupling member is connected via one surface of the first L-shaped member and the first plate member facing the first plate member, The second coupling member passes through one of the opposing side surfaces of the first beam member and the second beam member, and connects the other side of the first L-shaped member and the opposite side of the first L-shaped member. 2 plate members, through the other opposing side surface of the first beam member and the second beam member

According to the present invention, wooden beams can be firmly joined to the foundation.

It is a perspective view showing a beam joint structure concerning a 1st embodiment of the present invention. The beam joint structure of FIG. 1 is shown, (A) is a front view, and (B) is a side view. It is a perspective view which shows the L-shaped metal fitting used for the beam joint structure of FIG. It is a perspective view which shows the beam joint structure which concerns on the 2nd Embodiment of this invention. The beam joint structure of FIG. 4 is shown, (A) is a front view, and (B) is a side view. FIG. 5 is a perspective view showing an L-shaped member and a plate member used in the beam joint structure of FIG. 4;

A beam joint structure C1C according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, the vertical direction actually means the substantially vertical direction of the building, which is the vertical direction in FIGS. 2 and 5, and the lateral direction means the substantially horizontal direction of the actual building. This corresponds to the horizontal direction in FIGS. 2(B) and 5(B).
<First Embodiment>

As shown in FIGS. 1 and 2, the beam joint structure C1 includes a first beam member 1, a second beam member 2, a first L-shaped member 3, a second L-shaped member 4, It comprises a first coupling member 5 and a second coupling member. The first beam member 1 and the second beam member 2 are square prism-shaped wooden pieces, and constitute beams of a building. The first L-shaped member 3 and the second L-shaped member 4 are metal plate materials. The first coupling member 5 and the second coupling member 6 are metal penetrating members.

The first beam 1 and the second beam 2 have substantially the same cross section, and one cross section of the first beam 1 and one cross section of the second beam 2 are in contact with each other. They are joined by a first L-shaped member 3, a second L-shaped member 4, and a first coupling portion and a second coupling portion in the state of being folded. The other cross sections of the first beam member 1 and the second beam member 2 are each joined to a column to form a joint (not shown, see Japanese Patent No. 6814498).

Each of the first beam member 1 and the second beam member 2 has two through-holes (not shown) penetrating in the vertical direction at the end of the contacting cross-sectional side, and one through-hole penetrating sideways. It has a through hole. As will be described later, by fixing the first coupling member 5 and the second coupling member 6 through the through hole via the first L-shaped member 3 and the second L-shaped member 4, the first coupling member 5 and the second coupling member 6 are fixed. One beam member 1 and a second beam member 2 are connected to form a beam joint structure C1.

As shown in FIG. 3, each of the first L-shaped member 3 and the second L-shaped member 4 has an L-shaped cross section and maintains its cross-sectional shape by bending one sheet of metal plate material at approximately 90 degrees. It becomes an integral L-shaped metal fitting that extends as it is. However, the first L-shaped member 3 and the second L-shaped member 4 may be integrally formed by welding, extrusion, or the like. The first L-shaped member 3 and the second L-shaped member 4 have the same shape.

A first plate surface (one plate surface) 31 of the first L-shaped member 3 and a first plate surface (one plate surface) 41 of the second L-shaped member 4 sandwiching the beam material from above and below are Each has four through-holes h1 through which the first coupling members 5 pass. Of the four through-holes h1, a pair of through-holes corresponds to the first beam 1, and another pair of through-holes corresponds to the second beam 2. As shown in FIG. In addition, the first plate surface 31 of the first L-shaped member 3 covers at least part of the side surfaces of both the beams 1 and 2 .

The second plate surface 32 of the first L-shaped member 3 and the second plate surface 42 of the second L-shaped member 4 sandwiching the beam material from the lateral direction are the second plate surfaces 32 through which the second coupling member 6 penetrates. It has two through holes h2. Of the two through-holes h2, a pair of through-holes corresponds to the first beam 1, and the other pair of through-holes corresponds to the second beam 2. In addition, the second plate surface 32 of the first L-shaped member 3 covers at least part of the side surfaces of both the beams 1 and 2 .

The first connecting member 5 and the second connecting member 6 are conventionally well-known bolts and nuts. Bolts are inserted into the through holes of the first beam member 1 and the second beam member 2 through the through holes h1 and h2 of the first L-shaped member 3 and the through holes h1 and h2 of the second L-shaped member 4, respectively. The first beam member 1 and the second beam member 2 are connected by penetrating and fixing with nuts to form the beam joint structure C1.

At this time, the first plate surface 31 of the first L-shaped member 3 and the second L-shaped member The first surface 41 portion of 4 suppresses the force that tends to cause the two beam members 1 and 2 to be relatively displaced in the vertical direction, and is fixed. In addition, at the joint portion of both the beam members 1 and 2, the second plate surface 32 of the first L-shaped member 3 and the second plate surface 42 of the second L-shaped member 4 is fixed by suppressing the force that tends to relatively displace it in the lateral direction. This realizes a strong beam joint structure C1.

In particular, since the first plate-like portion and the second plate-like portion are integrally formed in the vertical direction, the force that bends the first plate surfaces 31 and 41 (vertical force in this embodiment) is The force that bends the second plate surfaces 32 and 42 (lateral force in this embodiment) is suppressed by the first plate surfaces 31 and 41 . Therefore, the first L-shaped member 3 and the second L-shaped member 4 resist the vertical and lateral forces applied to the beam joint structure C1 and firmly connect the beams 1 and 2 together.
<Second embodiment>

As shown in FIGS. 1 and 2, the beam joint structure C2 according to the second embodiment includes the first L-shaped member 3 and the second L-shaped member 4 of the beam joint structure C1 according to the first embodiment. The beam joint of the first embodiment in that the third L-shaped metal fitting 3A and the fourth L-shaped member 4A having different shapes are used instead of the first L-shaped member 3 and the second L-shaped member 4. Differs from structure C1. Moreover, in addition to this, it differs from the beam joint structure C1 of the first embodiment in that a first plate member 7 and a second plate member 8 are used.

In other words, the beam joint structure C2 of the second embodiment has the first beam member 1, the second beam member 2, the first joint member 5, and the second joint member 6 of the first embodiment. It has the same configuration as the beam joint structure C1. Therefore, in the following description, description of the same configuration as in the first embodiment will be omitted.

Like the first L-shaped member 3 and the second L-shaped member 4, the third L-shaped member 3A and the fourth L-shaped member 4A are formed by bending a sheet of metal plate at approximately 90°. As a result, the cross section becomes an L-shape, and an integral L-shaped metal fitting extending while maintaining the cross-sectional shape is obtained. However, the third L-shaped member 3A and the fourth L-shaped member 4A have smaller second plate surfaces 32A and 42A than the first L-shaped member 3 and the second L-shaped member 4. differ in Also, the third L-shaped member 3A and the fourth L-shaped member 4A have four through holes h1 and two through holes h2 similar to the first L-shaped member 3 and the second L-shaped member 4. .

Specifically, the length dimension in the short direction of the rectangular second plate surfaces 32A and 42A of the third L-shaped member 3A and the fourth L-shaped member 4A is equal to that of the first L-shaped member 3 and the second L-shaped member 4A. is about half the length of the second plate surfaces 32A, 42A of the L-shaped member 4 in the lateral direction. The third L-shaped member 3A and the fourth L-shaped member 4A may be formed integrally by welding, extrusion, or the like, similarly to the first L-shaped member 3 and the second L-shaped member 4. good. Also, the third L-shaped member 3A and the fourth L-shaped member 4A have the same shape.

The first plate member 7 and the second plate member 8 are flat metal members. The first plate member 7 and the second plate member 8 each have two through holes h3 through which the second coupling member 6 is passed. Of the two through holes h3, one through hole corresponds to the first beam 1 and the other through hole corresponds to the second beam 2. As shown in FIG.

Referring to FIGS. 1 and 2 again, the first plate member 7 cooperates with the second plate surface 32A of the third L-shaped member 3A to clamp the beams 1 and 2 together. 2 connecting members 6 are penetrated and connected. The second plate member 8 is joined together with the second plate surface 42A of the fourth L-shaped member 4A by passing through the second joining member 6 while holding the beams 1 and 2 therebetween. be. In addition, the first plate member 7 and the second plate member 8 cover at least part of the side surfaces of both beam members 1 and 2 .

In the beam joint structure C2 according to the second embodiment, the first plate surface 31A of the third L-shaped member 3A and the first plate surface 31A of the fourth L-shaped member 4A The plate surfaces 41A face each other and are fixed while suppressing the force that tends to shift the position in the vertical direction. In addition, at the joint portion of the two beams 1 and 2, the second plate surface 32A of the third L-shaped member 3A and the first plate member 7 are fixed by suppressing the force that tends to shift their positions in the lateral direction. be. Further, the second plate surface 42A of the fourth L-shaped member 4A and the second plate member 8 are fixed while suppressing the force that tends to shift the position in the lateral direction. This realizes a strong beam joint structure C2.

Although the embodiments of the present invention have been described above, the present invention is not limited to these descriptions. Appropriate design changes made by those skilled in the art with respect to the above-described embodiments are also included in the scope of the present invention as long as they have the features of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be used for a beam joint structure of a wooden building.

C1, C2 beam joint structure 1 first beam member 2 second beam member 3 first L-shaped member 4 second L-shaped member 3A third L-shaped member 4A fourth L-shaped member 5 first Coupling member 6 Second coupling member 7 First plate member 8 Second plate member 31 First plate surface (first L-shaped member)
32 Second plate surface (first L-shaped member)
41 First plate surface (second L-shaped member)
42 Second plate surface (second L-shaped member)
31A First plate surface (third L-shaped member)
32A Second plate surface (third L-shaped member)
41A first plate surface (fourth L-shaped member)
42A Second plate surface (fourth L-shaped member)

Claims (3)

a square-pillar-shaped wooden first beam;
a second wooden beam having the same cross-sectional shape as the first beam;
A first L-shape covering a part of two adjacent side surfaces across both beam members in a state where one cross section of the first beam member and one cross section of the second beam member are in contact with each other. a member;
Through one surface of the first L-shaped member, one of the opposing side surfaces of the first beam and the second beam is penetrated, and the both beams and the first L-shaped member are coupled. a first coupling member that
Through the other surface of the first L-shaped member, one of the opposing side surfaces of the first beam and the second beam is penetrated, and the both beams and the first L-shaped member are coupled. a beam joint structure, comprising: a second connecting member;
A second L-shaped member covering a part of two side surfaces different from the two side surfaces of the beam members covered by the first L-shaped member,
The first coupling member connects the first beam member and the second beam via one surface of the first L-shaped member and one surface of the second L-shaped member facing each other. through one opposing side of the timber,
The second coupling member connects the first beam member and the second beam through the other surface of the first L-shaped member and the other surface of the second L-shaped member facing each other. 2. A beam joint structure according to claim 1, passing through the other opposite side of the material.
A first plate member that covers one side surface different from the two side surfaces of the beam members covered by the one L-shaped member, and a plate member that covers the other side surface that is different from the two side surfaces of the beam members covered by the one L-shaped member. A second plate member covering one side surface,
The first connecting member is connected to one of the first beam member and the second beam member facing one side of the first L-shaped member via the first plate member facing the one surface of the first L-shaped member. through the sides,
The second coupling member connects the other of the first beam member and the second beam member via the second plate member that faces the other surface of the first L-shaped member. 3. The beam joint structure according to claim 2, which penetrates the side surface of the beam.

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