JP7021760B2 - Column and beam connection structure - Google Patents

Description

The present invention relates to a column-beam connection structure, and more particularly to a column-beam connection structure in a wooden building.

When connecting a beam to a through column in a wooden building, it has been conventionally practiced to insert a mortise protruding from the end face of the beam into a mortise hole formed on the side surface of the column having a rectangular cross section and fasten the beam (. For example, Patent Document 1).

However, in the above-mentioned connection structure of columns and beams, since the cross-sectional defect of the column becomes large due to the formation of the mortise, there is a risk that the column will break at this defect due to a large shaking and the building will collapse. For this reason, various hardware construction methods using special hardware instead of forming a mortise in a pillar have been studied, but there is a problem that the manufacturing cost and the working cost are increased.

Japanese Unexamined Patent Publication No. 8-105143

Therefore, an object of the present invention is to provide a column-beam connection structure capable of easily and inexpensively connecting columns and beams while maintaining good earthquake resistance of a wooden building.

The object of the present invention is a structure in which a groove protruding from an end surface of a beam is inserted into a groove formed on a side surface of a wooden column to connect the column and the beam, and the column has a rectangular cross section. The base portion and a plurality of rib portions that are provided so as to project to the side of the base portion and are in contact with the end faces of the beams, respectively, and the rib portions have the same width as the corresponding beam. The groove is formed in the rib portion, and each rib portion is formed by laminating a plurality of laminated woods in the depth direction of the groove and extends in parallel with the longitudinal direction of the base. The column is configured to have an L-shaped arbitrary cross section , and a through hole is formed on the bottom surface of the groove so as to open on the opposite side surface of the column, and the beam is formed in the longitudinal direction. An insertion hole for fastening is formed along the above, and a pull bolt is inserted into the insertion hole aligned with the through hole of the pillar to be fixed to the pillar, and the base and one of the above. The rib portion is formed by laminating a plurality of the laminated wood in one direction, and the other rib portion is formed by laminating the plurality of the laminated wood in a direction orthogonal to the laminating direction of one of the rib portions. Achieved by the connecting structure of columns and beams.

According to the present invention, it is possible to provide a column-beam connection structure capable of easily and inexpensively connecting columns and beams while maintaining good earthquake resistance of a wooden building.

It is a main part perspective view of the connection structure of a column and a beam which concerns on one Embodiment of this invention. It is sectional drawing which shows the main part of the connection structure of a column and a beam shown in FIG. 1 by disassembling. It is sectional drawing which shows the deformation example of the pillar shown in FIG. It is sectional drawing of the main part of the connection structure of a column and a beam which concerns on other embodiment of this invention. It is sectional drawing of the main part of the connection structure of a column and a beam which concerns on still another Embodiment of this invention. It is sectional drawing which shows the deformation example of the pillar shown in FIG. It is sectional drawing which shows the deformation example of the pillar shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of a main part of a connection structure of a pillar and a beam according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the main part showing the pillar and the beam shown in FIG. 1 in an disassembled state. In the pillar-beam connection structure 1 shown in FIGS. 1 and 2, the end faces of the two wooden beams 20 and 30 are brought into contact with the two sides of the wooden pillar 10 which is a through pillar of a wooden building, respectively. The two beams 20 and 30 are configured to be L-shaped in a plan view.

The pillar 10 is formed by laminating a plurality of laminated lumbers 10a and 10b, which are dried strip-shaped building materials, and adhering them with an adhesive. The two types of laminated lumber 10a and 10b have different widths W1 and W2 in the cross-sectional direction, and by laminating them in one direction, the base portion 11 having a rectangular cross-section and the two rib portions 12 and 13 are formed. Is formed.

The rib portions 12 and 13 are portions having a rectangular cross section provided so as to project laterally to the base portion 11, and extend in parallel with the longitudinal direction of the base portion 11, and any cross section of the pillar 10 is L-shaped. It is configured to be. Each of the rib portions 12 and 13 has the same width as the width of the beams 20 and 30 that abut against each other, and the beams 20 and 30 are flush with each other so that both side surfaces of the rib portions 12 and 13 are flush with both side surfaces of the beams 20 and 30. The end faces come into contact.

The beams 20 and 30 are provided with tenons 21 and 31 protruding from the end faces, respectively. The tenons 21 and 31 may be made of metal, but are preferably formed by cutting the ends of the wooden beams 20 and 30. Insertion holes 22 and 32 for fastening are formed in the center of the beams 20 and 30 along the longitudinal direction.

In the rib portions 12 and 13, mortise holes 14 and 15 into which the tenons 21 and 31 are inserted are formed at different height positions of the pillars 10, respectively. The depths of the mortises 14 and 15 are set shallower than the protruding lengths of the rib portions 12 and 13 in this embodiment. The shapes of the mortises 21, 31 and the mortises 14, 15 are not particularly limited in the present embodiment, but may be various known shapes.

Through holes 16 and 17 are formed on the bottom surfaces of the mortises 14 and 15 so as to open on the opposite side surface of the pillar 10. The beams 20 and 30 are fixed to the pillar 10 by inserting pull bolts (not shown) into the insertion holes 22 and 32 aligned with the through holes 16 and 17 of the pillar 10, respectively. Since the method of fastening the column and the beam using the pull bolt is well known, detailed description thereof will be omitted.

In the column-beam connection structure 1 having the above configuration, since the mortises 14 and 15 of the column 10 are formed in the rib portions 12 and 13, the through hole 16 for fastening the beams 20 and 30 is formed in the base 11. Since it is only necessary to form the columns 10 and 17, the columns 10 and the beams 20 and 30 can be easily and inexpensively connected while suppressing the cross-sectional defect of the base 11. It is preferable that the mortises 14 and 15 are formed only in the rib portions 12 and 13 so as not to reach the base portion 11 as in the present embodiment.

As an example, when the groove holes are formed in two places of the conventional 105-square through column, the cross-sectional defect rate becomes about 38% at the maximum, whereas the connection structure 1 of the column and the beam of the present embodiment is used. For example, when the base 11 is 105 square, the cross-sectional defect rate can be suppressed to about 18% at the maximum, the strength of the column can be secured, and good earthquake resistance can be obtained. Since both side surfaces of the rib portions 12 and 13 projecting from the base portion 11 are flush with both side surfaces of the joined beams 20 and 30, the rib portions 12 and 13 are provided to create an internal space of the building. The decrease can be prevented.

Further, by forming the pillar 10 from a plurality of laminated lumbers 10a and 10b having different widths W1 and W2, the warp of the pillar 10 is reduced, and not only the strength is improved as compared with the case of using a solid wood. , The pillar 10 having an L-shaped cross section in which the base portion 11 and the rib portions 12 and 13 are integrated can be easily formed.

Although one embodiment of the present invention has been described in detail above, the specific embodiment of the present invention is not limited to the above embodiment. For example, in the present embodiment, the pillar 10 is formed by laminating a plurality of laminated lumbers 10a and 10b having different widths in one direction, but as shown in FIG. 3, the depths of the mortises 14 and 15 are formed. The laminated lumber 10c may be laminated in each direction to form the rib portions 12 and 13. According to this configuration, the stacking direction of the laminated lumber 10c at the portion where the mortise holes 14 and 15 are formed coincides with the axial direction of the pull bolt (not shown) inserted into the through holes 16 and 17. , The bonding strength of the beams 20 and 30 to the column 10 can be increased, and the seismic resistance of the building can be further improved. In the configuration shown in FIG. 3, the laminated lumber 10c forming the rib portions 12 and 13 can be used with the same width, but when the widths of the beams 20 and 30 are different from each other, the widths are different. Glulam may be used.

Further, in the present embodiment, the two rib portions 12 and 13 projecting to the side of the base portion 11 are provided so as to have an L-shaped cross section, but as shown in FIG. 4, they are provided on the side of the base portion 111. The three rib portions 112, 113, 114 overhanging may be provided so as to have a T-shaped cross section, and the pillar 110 may be formed so as to be connected to the three beams 120, 130, 140. Alternatively, as shown in FIG. 5, four rib portions 212, 213, 214, 215 projecting to the side of the base 211 are provided so as to have a cross-sectional shape, and the four beams 220, 230, 240, 250 and the like. Pillars 210 may be formed so that they can be connected. As described above, a pillar having an appropriate cross-sectional shape can be used depending on the position of the through pillar in the wooden building.

In the configuration shown in FIG. 4, it is preferable that the mortise holes 115, 116, 117 formed in the rib portions 112, 113, 114 are all set in depth so as not to reach the base 111. Similarly, in the configuration shown in FIG. 5, the depths of the mortise holes 216, 217, 218, and 219 formed in the rib portions 212, 213, 214, and 215 are set so as not to reach the base 211. Is preferable.

Further, the pillars 110 and 210 shown in FIGS. 4 and 5 are configured by laminating laminated lumber 110a and 110b (or laminated lumber 210a and 210b) having different widths in one direction, but FIGS. 6 and 7 show. As shown in the above, laminated lumber 110c (or laminated lumber 210c) is laminated in the depth direction of each mortise 115, 116, 117 (or each mortise 216, 217, 218, 219), and the rib portion 112. , 113,114 (or rib portions 212,213,214,215) may be formed.

1 Column and beam connection structure 10 Column 10a, 10b Laminated lumber 11 Base 12, 13 Rib 14, 15 Mortise 20, 30 Beam 21, 31 Mortise

Claims (1)

A structure in which a mortise protruding from the end face of a beam is inserted into a mortise formed on the side surface of a wooden pillar to connect the pillar and the beam.
The pillar includes a base portion having a rectangular cross section and a plurality of rib portions provided so as to project laterally to the base portion and with which the end faces of the beams are in contact with each other.
The rib portion has the same width as the corresponding beam and has the same width.
The mortise is formed in the rib portion and is formed.
Each of the rib portions is formed by laminating a plurality of laminated lumbers in the depth direction of the mortise and extends in parallel with the longitudinal direction of the base portion, and any cross section of the pillar becomes L-shaped. It is configured as
On the bottom surface of the mortise, a through hole is formed to open on the opposite side surface of the pillar.
The beam has an insertion hole for fastening formed along the longitudinal direction, and is fixed to the column by inserting a pull bolt into the insertion hole aligned with the through hole of the column.
The base portion and one rib portion are formed by laminating a plurality of the laminated lumbers in one direction.
The other rib portion is a connecting structure of columns and beams formed by laminating a plurality of the laminated lumbers in a direction orthogonal to the laminating direction of one rib portion .

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