JP7278587B2 - Bracing hardware and joint structure of wooden building using it - Google Patents

Description

TECHNICAL FIELD The present invention relates to a bracing hardware and a joint structure of a wooden building using the same, and is particularly used for an earthquake-resistant structure and a damping structure of a wooden building.

Conventionally, in detached wooden houses, in order to improve earthquake resistance, it is a structure to increase rigidity and strength by fixing reinforcing hardware to the pillars and horizontal members (foundation, beams, etc.) at the joints. Common. In order to prevent the building from collapsing, the energy input to the building due to earthquakes and typhoons can be absorbed and reduced by constructing a structure in which elastic or viscoelastic bodies are placed against such earthquake-resistant reinforcing metal fittings. A vibration-damping type reinforcing hardware has been proposed (see, for example, Patent Document 1).

The reinforcing hardware described in Patent Document 1 consists of a brace-side hardware fixed to the end of the brace, a structural-material-side hardware fixed to the structural member, and an elastic or viscous material such as rubber interposed between these hardware. The elastic or viscoelastic body is composed of an elastic body and has a structure integrated with the hardware on both sides via an adhesive. It absorbs shear deformation.

Japanese Patent No. 3684129

However, the reinforcing hardware described in Patent Literature 1 may lose adhesion between the hardware and an elastic or viscoelastic body such as rubber after long-term use.

Moreover, since the reinforcing hardware described in Patent Document 1 is manufactured by laminating a plurality of metals and an elastic body such as rubber or a viscoelastic body, the manufacturing cost tends to be high.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bracing hardware and a joint structure of a wooden building that are excellent in the absorption performance of energy input to the wooden building and improve the reliability of earthquake resistance performance and damping performance.

A brace fitting according to one aspect of the present invention is a brace fitting attached between a structural member extending in the vertical or horizontal direction of a wooden building and a brace extending in a direction inclined with respect to the structural member, wherein the structural member and a brace fixing portion fixed to the end of the brace by a second fixing member, wherein the brace fixing portion is secured by the partition portion A base portion in which a plurality of partitioned fan-shaped openings are arranged side by side in the circumferential direction, and a mounting hole having a shape corresponding to the openings and being separated from the base portion and arranged to face the openings is provided. and a connecting piece portion connecting the outer peripheral edge of the opening and the outer edge of the mounting plate piece portion and extending in a direction orthogonal to the base portion.

Here, among the bracing hardware, the material of the hardware portion is a highly rigid member, for example, a metal plate such as a steel plate, a synthetic resin plate such as FRP, or the like. Wood screws, nails, and the like are used for the first and second fixing members. In wooden buildings, a structural material frame consisting of foundations, foundations, pillars, and beams is integrated using metal fittings as in the past, ensuring a certain level of strength and rigidity.

In this way, structural members such as vertically extending columns and horizontally extending horizontal members (bases or beams) are joined together, and braces extending in an inclined direction from the structural members are arranged at the joints. By applying the bracing hardware according to the present invention to the joint structure of the building, energy such as seismic force and wind force is input to the building, the columns are displaced in the rotational direction, and tensile and compressive forces are applied to the braces. When acted upon, the connecting pieces deform and the energy input into the building is absorbed (consumed) by these deformations.

In this case, a damping material may be filled at least between the base portion and the mounting plate piece portion . can be reduced.

In this case, it is desirable that a surface of the structural member fixing portion on the structural member side and a surface of the mounting plate piece portion on the brace fixing portion on the brace side are covered with a damping material layer of the damping material. . In this way, the damping material layer exerts a gripping effect so that the attachment position to the structural member or the brace is not shifted. In addition, corrosion is avoided and durability is enhanced when using a steel material or the like.

It is desirable that the structural member fixing portion is provided with bead-shaped or plate-shaped reinforcing portions on both sides thereof. In this way, the reinforcing portion improves the out-of-plane rigidity, making the structural member fixing portion less likely to bend. As a result, lifting of the fixing member fixed to the structural member is suppressed.

In addition, when viewed from the direction orthogonal to the base portion, the brace metal has a portion where the connecting piece portion is provided between the inner peripheral edge of the opening and the outer edge of the mounting plate piece portion. Except for this, it is desirable that a gap is formed.

A brace fitting according to another aspect of the present invention is a brace fitting attached between a structural member extending in a vertical direction or a horizontal direction of a wooden building and a brace extending in a direction inclined with respect to the structural member, wherein the structural member a structural member fixing portion fixed by a first fixing member through a mounting hole, and a brace fixing portion fixed by a second fixing member through a mounting hole at an end of the brace, wherein the brace fixing a base portion having an opening in the center; a mounting plate piece portion separated from the base portion and having a mounting hole along the circumferential direction of the opening; a peripheral edge of the opening and the mounting plate piece; and a plurality of connecting pieces extending in a direction perpendicular to the base portion and connecting the outer edge of the base portion.

In this case, it is desirable that the attachment hole of the structural member fixing portion is embossed so as to have a protruding portion that protrudes toward the structural member. By doing so, the embossed protruding portion has the effect of biting into the structural material, and the mounting position is prevented from being deviated.

Moreover, it is desirable that the mounting hole of the mounting plate piece portion in the brace fixing portion is also embossed so as to have a protruding portion that protrudes toward the brace. By doing so, the embossed protruding portion has the effect of biting into the brace, and the attachment position is prevented from slipping.

In one aspect of the joint structure of a wooden building according to the present invention, a first structural member extending in the vertical direction and a second structural member extending in the horizontal direction are butted and joined, and the joint portion is inclined with respect to the both structural members. A joint structure of a wooden building in which braces extending in the direction of the The fixing part is fixed by a first fixing member, and the brace fixing part is fixed to the side surface of the end of the brace by a second fixing member.

As described above, according to the present invention, the energy input to the building is absorbed by the deformation of the partitions and the connecting pieces. In addition, the reliability of the seismic performance and damping performance can be improved. Moreover, if damping materials are used, the reliability of the seismic performance and damping performance can be further improved.

Fig. 1(a) is a front view showing the mounting state of brace metal fittings, and Fig. 1(b) is a side view of the joint structure of a wooden building according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the brace metal fitting which is one embodiment which concerns on this invention. It is a front view of the said bracing hardware. It is a bottom view of the same. It is the same side view. FIG. 4 is a cross-sectional view taken along line AA of FIG. 3; FIG. 5 is a cross-sectional view taken along line BB of FIG. 4; FIG. 8 is a detailed view of a C portion in FIG. 7; FIG. 3 is a view similar to FIG. 2 showing a modification; FIG. 4 is a view similar to FIG. 3 showing a modification; FIG. 3 is a view similar to FIG. 2 showing a modification; 12(a) is a view similar to FIG. 2, and FIG. 12(b) is a sectional view taken along line DD of FIG. 12(a). FIG. 4 is a view similar to FIG. 3 showing a modification; FIG. 3 is a view similar to FIG. 2 showing a modification; FIG. 4 is a view similar to FIG. 3 showing a modification; FIG. 15 is a cross-sectional view taken along line EE of FIG. 14; FIG. 16 is a cross-sectional view taken along line FF of FIG. 15;

BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described below with reference to the drawings.

1A and 1B show a joint structure of a wooden building according to the present invention, FIG. FIG. 2 is a perspective view showing a brace according to the present invention, FIG. 3 is a front view of the brace, FIG. 4 is a bottom view of the brace, and FIG. 5 is a side view of the brace.

As shown in FIGS. 1(a) and 1(b), in a wooden building, columns 101, which are structural members extending in the vertical direction, and bases 102, which are structural members extending in the horizontal direction, are butted and joined in an inverted T shape. A brace 103 extending in an inclined direction with respect to the column 101 and the base 102 is arranged to abut on the joint portion. The brace hardware 1 is attached to the column 101 and the end portion 103A of the brace 103 at the joint portion.

As shown in FIGS. 2 to 5, the brace hardware 1 includes a plate-shaped column fixing portion (structural material fixing portion) 2 fixed to the column 101, and a brace fixing portion 3 fixed to the end portion 103A of the brace 103. and are integrally formed. As a material for the bracing hardware 1, a high-rigidity member such as a metal plate such as steel plate, a synthetic resin plate such as FRP, or the like is used.

The brace fixing part 3 has a plate-like base part 4 in which a plurality of fan-shaped openings 4a are arranged in a circular shape in the central part, and a fan shape corresponding to the shape of the openings 4a. a plurality of mounting plate piece portions 5; and a plurality of connecting piece portions extending in a direction perpendicular to the base portion 4 and the mounting plate piece portion 5 and connecting the outer peripheral edge of each opening 4a and the outer edge of each mounting plate piece portion 5. 6.

An opening 4b is formed in the center of the base portion 4. This opening 4b is a pilot hole for smoothly filling the damping material when the damping material is filled during molding as described later. and can be omitted.

Each mounting piece portion 5 is arranged substantially parallel to the base portion 4 with a predetermined gap therebetween, and is provided with two mounting holes 5a. The mounting holes 5a are provided near the ends of the mounting plate piece 5 in the longitudinal direction.

The connecting piece portion 6 has its upper end portion joined to the peripheral surface of the outer peripheral edge of each opening 4a and its lower end portion joined to the peripheral surface of the outer peripheral edge of each mounting plate piece portion 5 over the entire thickness direction. and each mounting plate piece portion 5 are connected.

A gap is formed between the inner peripheral edge of the opening 4a and the outer edge of the mounting plate piece portion 5 as viewed from the direction perpendicular to the base portion 4, except for the portion where the connecting piece portion 6 is provided. It is

With such a structure, a part of the base portion 4 can be punched out and molded, which is advantageous in reducing manufacturing costs.

A plurality of mounting holes 2a are formed in the column fixing portion 2 for fixing the column fixing portion 2 to the side surface of the column 101 by a plurality of first fixing members 11 (for example, wood screws) (FIGS. 7 and 8). (See FIG. 8) On the other hand, on each mounting plate piece 5 of the brace fixing portion 3, the brace fixing portion 3 is attached to the side surface of the end portion 103A of the brace 103 by a plurality of second fixing members 12 (for example, wood screws) through the openings 4a. A plurality of mounting holes 5a are provided for fixing to.

The mounting hole 2a is embossed so as to protrude toward the side contacting the column 101 (see FIGS. 6 to 8). This embossed protruding portion has an effect of biting into the column 101, so that the mounting position is not deviated.

As shown in FIG. 5 , the column fixing portion 2 extends from one side of the base portion 4 while being bent in a direction perpendicular to the base portion 4 . Nails or the like may be used instead of wood screws for the first and second fixing members 11 and 12, respectively.

At the bent portion from the column fixing portion 2 to the base portion 4 of the brace fixing portion 3, both sides of the column fixing portion 2 (outside the portion where the mounting hole 2a is provided) to the base portion of the brace fixing portion 3 A bead 8 is provided as a reinforcing part extending over both sides of 4 . The bead 8 improves the out-of-plane rigidity and makes the column fixing portion 2 less likely to bend.

Since it is sufficient that the column fixing portion 2 is less likely to bend, the beads may be formed only on the column fixing portion 2. Instead of the beads, as shown in FIG. It is also possible to provide a plate portion 28 as a reinforcing portion. The plate portion 28 may be formed by bending, or may be formed by joining plate materials by welding.

In this way, when an energy (horizontal force) P is input to the wooden building during rolling of an earthquake or a typhoon, and the column 101 is deformed, the column fixing portion 3 of the bracing hardware 1 fixed to the column 101 will be deformed. A displacement (relative displacement) occurs between the extending base portion 4 and the mounting plate piece portion 5 which is arranged parallel to the base portion 4 and which is connected via the connecting piece portion 5 and fixed to the end portion 103A of the brace 103. The displacement is eliminated by deformation of the connecting piece 6, thereby absorbing (consuming) energy.

In the brace 1 of this embodiment, the mounting plate piece 5 is arranged on the side opposite to the direction in which the column fixing portion 3 extends from the base portion 4 with respect to the base portion 4. Depending on the position, the mounting plate piece portion 5 may be arranged on the same side as the direction in which the column fixing portion 3 extends.

As described above, the preferred embodiments of the present invention have been described with reference to the drawings, but various modifications can be made without departing from the scope of the present invention. For example, it can be implemented by changing as follows.
(i) As shown in FIGS. 9 and 10, not only the mounting hole 2a of the column fixing portion 2 but also the mounting hole 5a' of the mounting piece portion 5' can be formed by embossing. A plate portion is also possible.
(ii) As shown in FIG. 11, the bracing fixing portion 23 includes a base portion 24 having a circular opening 24a in the center, and a mounting hole 25a disposed along the circumferential direction of the opening 24a away from the base portion 24. A plurality of fan-shaped mounting plate pieces 25 provided, and a plurality of joints extending in a direction perpendicular to the base portion 24 by connecting the inner peripheral edge of the opening 24 a and the central portion of the outer edge of the mounting plate piece 25 . The structure may include a piece 26 . In this case, not only the mounting hole 2a of the column fixing portion 2 but also the mounting hole of the mounting piece portion 25 can be formed by embossing. Alternatively, only the mounting holes of the mounting piece portion 25 may be formed by embossing.
(iii) As shown in FIGS. 12(a) and 12(b), a damping material 31 (e.g., a damping material 31) vulcanized and adhered between (the space between) the base portion 4 and the plurality of mounting piece portions 5. A structure filled with an elastic body such as damping rubber or a viscoelastic body can also be used. In this way, the plurality of connecting pieces 6 and the damping material 31 work together to improve the energy absorption performance, so that the reliability of the seismic resistance and damping performance can be greatly enhanced.

That is, for a small energy input, the damping material 31 absorbs energy, and for a large energy input, each coupling piece 6 and the filled damping material 31 absorb a large amount of energy in the hybrid.

In this way, by applying the brace hardware 1 between the pillar 101 (structural material) and the brace 103 of the wooden building, the energy input to the wooden building due to an earthquake or a typhoon can be absorbed by the damping material 31 or the connecting pieces. It can be absorbed by the deformation of 6. Therefore, by adding the damping material 31, it is possible to ensure a large energy absorption performance, and to greatly improve the reliability of the seismic resistance performance and the vibration damping performance.

In this embodiment, part of the damping material 31 covers the surface of the hardware, but it is also possible to provide it only between the base part 4 and the attachment piece part 5 .
(iv) As shown in FIG. 13, each mounting piece portion 5'' may have one mounting hole 5a' in the central portion and be connected to the base portion 4 by one connecting piece portion 6. It is possible. Also, the number of mounting pieces 5 is not limited to four.
(v) As shown in FIGS. 14 to 17, not only the mounting hole 5a of the mounting plate piece 5, but also the hole 2a' of the column fixing portion 2 is similar to the mounting hole 5a of the mounting plate piece 5. It can also be a regular hole that is not embossed. In this case, although not specifically illustrated, a thin damping material layer having a thickness of about 0.5 mm may be applied to the surface of the structural member fixing portion on the structural member side and the brace side of the attachment piece portion of the brace fixing portion. , and the gripping effect of this layer of damping material is replaced by the biting effect of the embossed mounting holes.

The damping material layer of the damping material can be covered with a portion of the filling material when the damping material is filled between the base portion and the attachment piece portion. Incidentally, 4b and 4c are pilot holes through which the damping material enters and exits during molding, and can be omitted.

Reference Signs List 1 Brace hardware 2 Column fixing parts 2a, 2a' Mounting holes 3, 23 Brace fixing parts 4, 24 Base parts 4a, 24a Openings 4b, 4c Openings 5, 5', 5'', 25 Mounting plate pieces 5a, 5a ', 25a attachment hole 6, 26 coupling piece 7 partition 7A, 7B portion 8 bead 11 first fixing member 12 second fixing member 101 pillar 102 base 103 brace 103A brace end

Claims (9)

A brace fitting attached between a structural member extending in the vertical or horizontal direction of a wooden building and a brace extending in a direction inclined with respect to the structural member,
a structural member fixing portion fixed to the structural member by a first fixing member;
a brace fixing portion fixed to an end portion of the brace by a second fixing member;
The brace fixing part
a base portion in which a plurality of fan-shaped openings partitioned by the partition portion are arranged side by side in the circumferential direction;
a mounting plate piece portion having a shape corresponding to the opening and having a mounting hole disposed facing the opening apart from the base portion;
A bracing hardware, comprising: a connecting piece portion connecting an outer peripheral edge of the opening and an outer edge of the mounting plate piece portion and extending in a direction orthogonal to the base portion. 2. The bracing hardware according to claim 1, wherein a damping material is filled at least between said base portion and said mounting plate piece portion . 3. A damping material layer according to claim 2, wherein a surface of the structural material fixing portion on the structural material side and a surface of the mounting plate piece portion on the brace fixing portion on the brace side are covered with a damping material layer of the damping material. bracing hardware. The bracing hardware according to any one of claims 1 to 3, wherein the structural member fixing portion is provided with bead-shaped or plate-shaped reinforcing portions on both sides thereof. A gap is formed between the inner peripheral edge of the opening and the outer edge of the mounting plate piece as viewed from the direction orthogonal to the base portion, except for the portion where the coupling piece is provided. 5. The bracing hardware according to any one of claims 1-4, wherein A brace fitting attached between a structural member extending in the vertical or horizontal direction of a wooden building and a brace extending in a direction inclined with respect to the structural member,
a structural member fixing portion fixed to the structural member by a first fixing member through an attachment hole;
a brace fixing portion fixed by a second fixing member through a mounting hole at the end of the brace;
The brace fixing part
a base portion having an opening in the center;
a mounting plate piece portion separated from the base portion and arranged along the circumferential direction of the opening and provided with a mounting hole;
A bracing metal fitting comprising a plurality of connecting piece portions connecting a peripheral edge of the opening and an outer edge of the mounting plate piece portion and extending in a direction perpendicular to the base portion. 7. The bracing hardware according to claim 6, wherein the attachment hole of said structural member fixing portion is embossed so as to have a protruding portion protruding toward said structural member. The brace fitting according to claim 6 or 7, wherein the mounting hole of the mounting plate piece portion of the brace fixing portion is embossed so as to have a projecting portion projecting toward the brace. Joint structure of a wooden building in which a first structural member extending in a vertical direction and a second structural member extending in a horizontal direction are butted and joined, and a brace extending in a direction inclined with respect to the two structural members is arranged at the joining portion and
The bracing hardware according to any one of claims 1 to 8 is used,
The structural member fixing portion is fixed to the first structural member or the second structural member by a first fixing member, and the brace fixing portion is fixed to the side surface of the end portion of the brace by a second fixing member. A joint structure of a wooden building characterized by:

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