JP7620507B2 - Joint structure - Google Patents

Description

The present invention relates to a joint structure between a pillar and a beam.

In wooden buildings, it is common to use pin joints with plates and drift pins for the joints between columns and beams. However, precision is required to drive in the drift pins, and many drift pins must be driven in during construction, making this method difficult to install.

Patent Document 1 discloses an example of using a specially shaped metal joint at the joint between a column and a beam as an improved construction method of the conventional framework construction method used in wooden buildings. In Patent Document 1, upper and lower columns are inserted and fastened into the space of a steel joint member (metal joint), and the beam is set on the receiving plate of the joint member and fastened.

Japanese Patent Application Laid-Open No. 9-165837

Patent Document 1 is aimed at small-scale buildings such as wooden houses, and uses joint members roughly the same size as the columns (cross-sectional size), with the columns being inserted into the spaces provided by the joint members. On the other hand, when applying similar joint members to large buildings, the columns are expected to be even larger, and using joint members that match the size of the columns would result in increased weight and poor handling during construction.

The present invention was made in consideration of the above problems, and aims to provide a column-beam joint structure that makes construction easier.

In order to solve the above-mentioned problems, the present invention provides a column-to-beam joint structure, in which at least one of the columns and the beams is made of wood material, a column joint member is fixed to the upper end surface of the lower column and the lower end surface of the upper column, the column joint member of the lower column is joined to the column joint member of the upper column, and a joint portion is provided on the side of the column joint member that joins the end portion of the beam arranged on the side of the lower column on the column side to the portion of the column joint member of the lower column above the column of the lower column.

In the present invention, by joining the column joint members fixed to the end faces of the upper and lower columns, there is no need to match the size of the column joint members to the size of the columns, and even in large buildings such as buildings, relatively small joint members can be used, making construction easier. In addition, by joining the beams to the column joint members at the joints, it becomes easier to join the column and beam members.

It is desirable that the joint portion has a joint plate protruding laterally from a portion of the column joint member of the lower column above the lower column, and a beam joint member fixed to the end of the beam, and that the joint plate and the beam joint member are joined using fasteners.
In the present invention, even if the column joint member is smaller than the column, it can be used to join the beam by extending the joint plate to the side of the column. In addition, by using fasteners for joining, loosening when repeated loads are applied during earthquakes, etc. can be suppressed.

The beam is, for example, made of wood, and the joint has a beam joining member fixed to the end of the beam, the beam joining member having an L-shaped main body with a side plate and a bottom plate, and a vertical plate fixed to the side plate and the bottom plate, and the bottom plate and the vertical plate are inserted into a T-shaped groove provided at the end of the beam.
This makes it possible to create details that are resistant to repeated deformation caused by earthquakes, etc., and also makes it easy to join the beams.

It is desirable that the column joint member of the lower column includes a base plate arranged on the upper end surface of the lower column, and the column joint member of the upper column includes a base plate arranged on the lower end surface of the upper column, and that a pair of splice plates are arranged between the base plate on the upper end surface of the lower column and the base plate on the lower end surface of the upper column so as to sandwich the column joint member of the lower column and the column joint member of the upper column, and that the pair of splice plates are fastened to each column joint member using fasteners.
This makes it easier to accommodate errors between column connection components, improving workability.

The present invention can provide a column-beam joint structure that makes construction easier.

FIG. 4A to 4C are diagrams for explaining the fixing of the beam joint member 13 to the beam 2. A diagram showing a joint structure 10a. A diagram showing a joint structure 10b. A diagram showing joint structure 10b'.

The following describes in detail a preferred embodiment of the present invention with reference to the drawings.

Figure 1 is a diagram showing a joint structure 10 according to an embodiment of the present invention. In Figure 1, (a) is a diagram showing the joint structure 10 as seen from the side, and (b) is a diagram showing a horizontal cross section taken along line a-a in Figure 1(a). The above also applies to Figures 3 to 5, which will be described later.

The joint structure 10 joins the columns 1 and the beams 2, and is formed at the joints between the upper and lower columns 1 and the left and right beams 2. The columns 1 and beams 2 are made of wood. The beams 2 are positioned to the sides of the lower columns 1.

The joint structure 10 includes a lower joint member 11, an upper joint member 12, a beam joint member 13, etc.

The lower joint member 11 and the upper joint member 12 are column joint members used to join the upper and lower columns 1.

The lower joint member 11 is a steel member that is fixed to the upper end surface of the lower column 1, and in this embodiment, it has a configuration in which an H-shaped steel 112 is provided on the upper surface of a base plate 111.

The base plate 111 is placed on the upper end surface of the pillar 1, and the upper end of the anchor bolt 113 embedded in the pillar 1 protrudes upward from a hole (not shown) in the base plate 111. The base plate 111 is fixed to the upper end surface of the pillar 1 by tightening a nut 114 (double nut) on this protruding portion.

The H-shaped steel 112 is placed on the upper surface of the base plate 111 with the component axis direction being vertical, and is fixed to the base plate 111 by welding or the like. A joining plate 115 that protrudes to the side is fixed to the flange of the H-shaped steel 112 by welding or the like. The joining plate 115 is used to join the beam joining member 13, and is placed with its plate surface being vertical.

The beam connection member 13 is a steel member that is fixed to the end of the beam 2 on the column 1 side (hereinafter simply referred to as the "end of the beam 2"). Figure 2 is a diagram explaining the fixing of the beam connection member 13 to the beam 2.

The beam joint member 13 has a main body 131 and a vertical plate 132. The main body 131 is a plate material bent into an L shape, and has a side plate 1311 and a bottom plate 1312. The vertical plate 132 is provided in the center of the main body 131 in the width direction, and is fixed to each of the side plate 1311 and the bottom plate 1312 by welding or the like. The upper end of the vertical plate 132 protrudes upward from the main body 131, and a hole 1321 is also provided in the vertical plate 132.

A T-shaped groove 21 is provided at the end of the beam 2, and the beam joint member 13 is positioned by inserting the above-mentioned bottom plate 1312 and vertical plate 132 into the groove 21. At this time, the hole 1321 of the vertical plate 132 communicates with the holes 22 formed on both side surfaces of the beam 2, and the beam joint member 13 is fixed to the end of the beam 2 by passing the drift pin 23 through these holes 22, 1321.

As shown in FIG. 1(a), the upper end of the vertical plate 132 protrudes upward from the beam 2, and as shown in FIG. 1(b), a pair of splice plates 14 are arranged to sandwich the upper end of the vertical plate 132 and the above-mentioned connecting plate 115 from both sides. These splice plates 14 are fastened to the upper end of the vertical plate 132 and the connecting plate 115 respectively using fasteners 15 consisting of bolts (high-strength bolts) and nuts, thereby connecting the lower connecting member 11 and the beam connecting member 13.

As a result, the lower joint member 11 and the end of the beam 2 are joined using the joint plate 115 and the beam joint member 13. The joint plate 115 and the beam joint member 13 are disposed to the side of the lower joint member 11 and form a joint for joining the lower joint member 11 and the end of the beam 2.

The upper connecting member 12 is a steel member fixed to the lower end surface of the upper column 1, and similar to the lower connecting member 11, has a structure in which an H-shaped steel 122 is provided on the lower surface of a base plate 121. The base plate 121 is fixed to the lower end surface of the column 1 using anchor bolts 123 and nuts 124, similar to the base plate 111 described above.

As shown in FIG. 1(a), in this embodiment, a pair of splice plates 16 are arranged to sandwich the flange of the H-shaped steel 112 of the lower connecting member 11 and the flange of the H-shaped steel 122 of the upper connecting member 12 from both sides.

These splice plates 16 are fastened to the flanges of the H-shaped steel 112 of the lower connecting member 11 and the flanges of the H-shaped steel 122 of the upper connecting member 12 using fasteners 17 consisting of bolts (high-strength bolts) and nuts, respectively, thereby joining the flanges of the H-shaped steel 112, 122 of the lower connecting member 11 and the upper connecting member 12. The web of the H-shaped steel 112 of the lower connecting member 11 and the web of the H-shaped steel 122 of the upper connecting member 12 are also joined to each other using splice plates 16 and fasteners 17 in the same manner as above, thereby joining the lower connecting member 11 and the upper connecting member 12.

As described above, in this embodiment, by joining the lower joining member 11 and the upper joining member 12 fixed to the end faces of the upper and lower columns 1, it is not necessary to match the size of these joining members to the size of the column 1, and relatively small joining members can be used even in large buildings such as buildings, making construction easier. In addition, by joining the beam 2 to the lower joining member 11 using the joining plate 115 and the beam joining member 13, joining of the column-beam members becomes easier.

In this embodiment, even if the lower joint member 11 is smaller in size than the column 1, it can be used to join the beam 2 by the joint plate 115 extended to the side of it. In addition, using fasteners 15 to join the joint plate 115 and the beam joint member 13 is also preferable because it shows flexible behavior close to that assumed when a pre-analysis is performed assuming that the joint is a pin joint. For example, in the pin joint using the plate and drift pin of the conventional technology described above, there is a possibility that rigidity will be generated at the joint. In addition, there is a concern that repeated loads will act on the drift pin during earthquakes, etc., causing it to loosen, but such loosening can be suppressed by using fasteners 15 for joining.

The beam joint member 13 has its bottom plate 1312 and vertical plate 132 inserted and fixed into the T-shaped groove 21 of the beam 2, so that the end of the beam 2 rests on the bottom plate 1312 and is fixed, providing a detail that is resistant to repeated deformation caused by earthquakes, etc. Also, by joining the vertical plate 132 to the above-mentioned joint plate 115, the beam 2 can be easily joined.

In addition, as described above, the lower connecting member 11 and the upper connecting member 12 are joined using the splice plate 16 and fasteners 17. By inserting a filler plate inside the splice plate 16 or making the holes for the bolts long, for example, it becomes easier to absorb errors between the connecting members, improving workability. For example, as a building becomes larger and the dimensions of each component become larger, the variation in component dimensions also increases, so it is particularly preferable to make these joints capable of absorbing errors. The same applies to the joining of the lower connecting member 11 and the beam 2, and errors can be easily absorbed by using the splice plate 14 and fasteners 15.

However, the present invention is not limited to the above embodiment. For example, columns 1 and beams 2 may be provided with fireproof coating (not shown) as necessary, and decorative materials, etc., may be provided on the surfaces.

The shape and configuration of the lower joint member 11 and the upper joint member 12 are not particularly limited, and any member capable of joining the upper and lower columns 1 may be used. In this embodiment, the joint plate 115 is fixed to the flange of the H-shaped steel 112 and used to join the beam joint member 13, but it is also possible to omit this joint plate 115 and directly join the flange of the H-shaped steel 112 and the vertical plate 132a of the beam joint member 13a using the splice plate 14 and fastener 15 as shown in the joint structure 10a of FIG. 3. In this case, the beam joint member 13a forms a joint for joining the lower joint member 11 and the end of the beam 2. In the example of FIG. 3, the upper end of the vertical plate 132a is slightly bent toward the column 1, and this bent portion and the flange of the H-shaped steel 112 are joined using the splice plate 14 and fastener 15.

In this embodiment, the column 1 and the beam 2 are made of wood, but the column 1 can also be a steel column. In this case, the upper and lower steel columns are joined by a lower joining member 11 and an upper joining member 12, and the beam joining member 13 fixed to the end of the beam 2 is joined to the lower joining member 11.

It is also possible to use wood for the column 1 and steel for the beam 2. In this case, as shown in the joint structure 10b in FIG. 4, instead of the joint plate 115 in FIG. 1, a hook-shaped joint plate 115a that bends downward may be fixed to the H-shaped steel 112 of the lower joint member 11, and the downward bent portion of the joint plate 115a may be fastened to the web 24 of the steel beam 2a using a fastener 18 consisting of a bolt (high-strength bolt) and a nut. In this case, the joint plate 115a forms the joint for joining the lower joint member 11 and the end of the steel beam 2a.

In the example of Figure 4, the end of the upper flange 25 of the steel beam 2a facing the column 1 is partially cut out so that the bent portion of the connecting plate 115a can be inserted into the position of the web 24. The end of the lower flange 25 facing the column 1 is also cut out at the same position, so that the steel beam 2a can be dropped in from above with the lower column 1 and lower connecting member 11 in place.

In the example of FIG. 4, a joint plate 115a is placed on one side of the web 24 of the steel beam 2a and fastened with a fastener 18 to form a one-sided shear joint, but as shown in the joint structure 10b' of FIG. 5, a two-sided shear joint detail may be used. In this example, a joint plate 115 fixed to the flange of the H-shaped steel 112 and a mounting plate 26 provided on the upper surface of the upper flange 25 of the steel beam 2a are sandwiched from both sides by a pair of splice plates 14, and these splice plates 14 are fastened to the joint plate 115 and the mounting plate 26 using fasteners 15. In this case, the joint plate 115 and the mounting plate 26 form a joint for joining the lower joint member 11 and the end of the steel beam 2a.

The above describes preferred embodiments of the present invention with reference to the attached drawings, but the present invention is not limited to these examples. It is clear that a person skilled in the art can come up with various modified or revised examples within the scope of the technical ideas disclosed in this application, and it is understood that these also naturally fall within the technical scope of the present invention.

1: Column 2: Beam 2a: Steel beam 10, 10a, 10b, 10b': Joint structure 11: Lower joint member 12: Upper joint member 13, 13a: Beam joint member 14, 16: Splice plate 15, 17, 18: Fastener 21: Groove 115, 115a: Joint plate 111, 121: Base plate 112, 122: H-shaped steel 131: Main body 132, 132a: Vertical plate 1311: Side plate 1312: Bottom plate

Claims (4)

A column-beam joint structure,
At least one of the columns and beams is made of wood material;
The column joint members are fixed to the upper end faces of the lower columns and the lower end faces of the upper columns,
The column joint members of the lower column and the upper column are joined together,
A joint structure characterized by having a joint provided on the side of a column joint member that joins the end portion of a beam arranged on the side of a lower column on the column side to a portion of the column joint member of the lower column above the lower column . The joint is
A joint plate protruding laterally from a portion of the column joint member of the lower column above the lower column;
A beam connecting member fixed to the end of the beam;
having
2. The joint structure according to claim 1, wherein the joint plate and the beam joint member are joined together using a fastener. The beams are made of wood.
The joint includes a beam joint member fixed to the end of the beam,
The beam connecting member is
An L-shaped main body having side panels and a bottom panel;
A vertical plate fixed to the side plate and the bottom plate;
having
3. The joint structure according to claim 1, wherein the bottom plate and the vertical plate are inserted into a T-shaped groove provided at the end of the beam. The column joint member of the lower column includes a base plate disposed on an upper end surface of the lower column;
The column joint member of the upper column includes a base plate disposed on a lower end surface of the upper column;
A joint structure as described in any one of claims 1 to 3, characterized in that a pair of splice plates are arranged between a base plate on the upper end surface of the lower column and a base plate on the lower end surface of the upper column, so as to sandwich the column joint member of the lower column and the column joint member of the upper column, and the pair of splice plates are fastened to each of the column joint members using fasteners.

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