JP2024022962A - Diagonal brace structure in wooden building - Google Patents

Abstract

To provide a diagonal brace structure in a wooden building that can be multiply mounted between each column by providing a diagonal brace support without penetrating a column while restraining buckling deformation of a diagonal brace.SOLUTION: A diagonal brace structure in a wooden building where a diagonal brace 19 is fixed to a frame body 17 constituted by columns 15, a beam 11 and a groundsill 13 comprises a diagonal brace support 23 that is substantially parallel with the beam 11 and the groundsill 13, crosses the diagonal brace 19 and is fixed at an intersected part, and locates a height-direction middle portion of the column 15 and is bridged between opposed surfaces 21 of the column 15 to fix both ends. The diagonal brace support 23 includes a buckling preventive bolt 31 having male screw parts 37 at ends and back plates 33 provided with female screw cylinder parts 43 screwed with the male screw parts 37. The back plate 33 is put to one side in a width direction in the opposed surface 21 in a state where it is fixed to the opposed surface 21 of the column 15 with a center axis of the buckling preventive bolt 31 decentering from a center of a plate surface and the center of the buckling preventive bolt 31 adjusting to the center of the column 15.SELECTED DRAWING: Figure 1

Description

The present invention relates to brace structures in wooden buildings.

In a wooden building, columns, beams, girders, etc. are made of wood, and in order to provide durability, diagonal members such as braces and braces are used as reinforcing materials. The brace used as this reinforcing material has a rectangular shape that is composed of upper and lower horizontal members that serve as foundations and beams, and columns that are vertical members sandwiched between these horizontal members, as described in Patent Document 1 below. The frame is diagonally fixed diagonally so that both ends are located at each joint part of the frame. Both ends of the brace and the frame are constructed using joining fittings (brace coupling fittings) so that they do not easily separate from each other, and the rigidity of the rectangular frame is increased.

Japanese Patent Application Publication No. 10-299084 Japanese Patent Application Publication No. 2005-30145

The above-mentioned brace configuration is used to resist compressive force caused by external forces such as earthquakes, but when this compressive force is large, buckling occurs because only both ends are fixed, causing the brace to buckle. There is a risk that the approximately middle portion may break, bulge outward from the wall surface, penetrate the wall surface, and protrude. In order to suppress the occurrence of bending due to such buckling, there have been structures in which studs are provided between columns in parallel with these columns, and these studs and braces are fixed and supported. Since the studs themselves do not have the strength to withstand the load, the studs may break or crack before the braces buckle, making it impossible to achieve sufficient rigidity.

In addition, the brace joint metal fittings used in the above-mentioned brace configuration are for internal use, with the metal fittings placed near the inner corners, so the metal fittings are placed across the outside surfaces of the columns and horizontal members (beams and foundations). There is also the disadvantage that the braces are more likely to buckle out of plane from the inside to the outside compared to external use in which the braces are placed.

On the other hand, as described in Patent Document 2, it is approximately parallel to the horizontal members and intersects with the braces, and is located midway in the height direction of the columns and spans between the columns. According to a brace structure that includes brace supports that are fixed to columns at both ends, the durability of the brace against compressive force can be improved and buckling damage can be prevented.
However, this brace support is provided with male threads at both ends, both ends pass through each column, and the female thread member is screwed and fixed. Therefore, when braces are provided between a plurality of columns, the brace support If brace supports are installed in series between each column, that is, if brace supports are attached to each of the adjacent columns of a plurality of columns, both ends of each brace support will interfere, which makes it difficult to connect them in succession. Additionally, if the brace supports (anti-buckling bolts) are long and the spacing between the columns is shorter than the anti-buckling bolts, there is a problem in that the anti-buckling bolts protrude for a long time from the penetration side of the columns. There is also.

The present invention was made in view of the above circumstances, and its purpose is to suppress buckling deformation of the braces while providing a brace support without penetrating the columns, thereby making it possible to connect columns between each column. The purpose of this invention is to provide a bracing structure for wooden buildings that can be used.

Next, means for solving the above problems will be described with reference to drawings corresponding to embodiments.
The brace structure in a wooden building according to claim 1 of the present invention is a wooden building in which a brace 19 is fixed to a joint of a rectangular frame 17 made up of a vertical member 15 and horizontal members 11 and 13. A brace structure in which
The horizontal members 11 and 13 are substantially parallel to each other, intersect with the brace 19 at the midway point, and are fixed to the brace 19 at the intersection, and are located midway in the height direction of the vertical member 15. A brace support 23 is provided which is spanned between the facing surfaces 21 of the vertical members 15 and fixed at both ends,
The brace support 23 is
An anti-buckling bolt 31 having a male threaded portion 37 at its end;
At least a seat plate 33 provided with a female threaded cylinder part 43 of a predetermined length that is screwed into the male threaded part 37,
In the seat plate 33, the central axis of the anti-buckling bolt 31 is eccentric from the center of the plate surface, and the center of the anti-buckling bolt 31 is aligned with the center of the vertical member 15, so that It is characterized in that, in a fixed state, it is fixed to one side of the opposing surface 21 in the width direction.

In this brace structure in a wooden building, the brace support 23 is located at a midway point in the height direction of the vertical member 15 and spans the vertical member 15. In the brace support 23, both ends of an anti-buckling bolt 31 are fixed to the facing surface 21 of the vertical member 15 with screws.
The anti-buckling bolt 31 has a male threaded portion 37 at the end. The male threaded portion 37 is screwed into the female threaded cylindrical portion 43 . The female threaded cylinder portion 43 has a base end fixed to the seat plate 33 by welding or the like. The seat plate 33 to which the female threaded cylindrical portion 43 is fixed is fixed to the facing surface 21 of the vertical member with screws.
That is, the anti-buckling bolt 31 is screwed to the facing surface 21 of the vertical member 15 via the internally threaded cylindrical portion 43 and the seat plate 33. The brace support 23 is constituted by these anti-buckling bolts 31, a female threaded cylinder portion 43, a seat plate 33, and a screw 39. Note that the brace support 23 may have the male threaded portion 37 formed only at one end of the anti-buckling bolt 31. That is, the other end of the buckling prevention bolt 31 of the brace support 23 may be directly fixed to the seat plate by welding or the like.
In the braced structure of a wooden building, when an external force such as an earthquake is applied and a compressive force is applied to the braces 19, the braces 19 will bend in the middle and try to bend, but the brace supports 23 will bend. This suppresses deflection and supports the brace 19. As a result, although the braces 19, which are reinforcing materials, undergo bending deformation, they do not suffer from buckling damage, and it is possible to obtain a wooden building with improved durability. Therefore, even if the brace joint is used internally (fixed near the inner corner), a wooden building with improved durability can be obtained.
Even when the buckling prevention bolts 31 are arranged continuously between the vertical members 15, the brace supports 23 have both ends of the buckling prevention bolts 31 seated on the opposing surfaces 21 of the vertical members 15. Since they are each fixed with screws by the plate 33, they can be arranged between the opposing surfaces between them and another vertical member 15, and the adjacent anti-buckling bolts 31 can be installed without interference, that is, they can be connected in series. Become.
In addition, the brace support 23 can adjust the distance between the counterbores at both ends to match the distance between the vertical members by relatively rotating the male threaded portion 37 of the anti-buckling bolt 31 and the female threaded cylindrical portion 43 of a predetermined length. Adjustment is possible.
Furthermore, in the brace structure of a wooden building, the seat plate 33 is fixed eccentrically with respect to the anti-buckling bolt 31, so that the anti-buckling bolt 31 is mounted to one side and passes through the center of the vertical member 15. The seat plate 33 can be placed, for example, in a position (orientation) away from the indoor side. This makes it possible to prevent the edge portion of the washer 33 from being exposed to the indoor side even in the case of a Japanese-style room with a solid wall finish in which the side surfaces of the vertical members 15 are exposed to the indoor side.

The brace structure in a wooden building according to claim 2 of the present invention is the brace structure in a wooden building according to claim 1,
The seat plate 33 is characterized in that it has a through hole 45 through which the male threaded portion 37 passes.

In this bracing structure for a wooden building, the seat plate 33 that fixes the base end of the female threaded cylindrical part 43 has a through hole 45 through which the male threaded part 37 screwed with the female threaded cylindrical part 43 can pass. That is, when the male threaded portion 37 is screwed longer than the entire length of the female threaded cylinder portion 43, it protrudes from the through hole 45 of the seat plate 33. A recess 51 into which the end of the anti-buckling bolt 31 protruding from the through hole 45 enters is bored in the opposing surface 21 of the vertical member 15 to which the seat plate 33 is fixed with screws.
As a result, even if the distance between the centers of the vertical members 15 is constant and the cross-sectional sizes of the vertical members 15 vary, or the distances between the facing surfaces of the vertical members 15 vary, the anti-buckling bolt 31 The bracing support 23 can be attached to the facing surface 21 of the vertical member 15 while avoiding interference between the vertical member 15 and the vertical member 15. In other words, the length of the anti-buckling bolt 31 can be adjusted to accommodate each distance between the facing faces. becomes possible.

The brace structure in a wooden building according to claim 3 of the present invention is the brace structure in a wooden building according to claim 1 or 2,
The braces 19 are constructed of sashes, and the anti-buckling bolts 31 are arranged between the pair of braces 19 that intersect, and the pair of braces 19 are fastened together in the thickness direction, so that the pair of braces 19 It is characterized in that the intersecting portions of the anti-buckling bolts 31 are fixed by being sandwiched.

In this brace structure in a wooden building, when the brace 19 is a sash, the anti-buckling bolt 31 of the brace support 23 is sandwiched from both sides. In the anti-buckling bolt 31, braces sandwiched from both sides are fastened to each other by, for example, two screws 39 on one side and a total of four screws 39 on both sides. The double-sided hammering of the screws 39 at the intersection of the braces of the sash is such that the screws 39 do not overlap on the front and back surfaces. As a result, the anti-buckling bolt 31 is sandwiched between the braces 19 on the front and back, and the intersection of the braces and the longitudinal center of the anti-buckling bolt 31 are integrally fixed, thereby further suppressing buckling damage of the braces 19. do.

According to the bracing structure for a wooden building according to claim 1 of the present invention, buckling prevention bolts are provided that span between vertical members without penetrating the vertical members while suppressing buckling deformation of the braces. By doing so, it is possible to further provide a brace support between other vertical members, that is, it is possible to connect them together. This makes it possible to reinforce all of the braces that make up the wooden building. In addition, since the seat plate is fixed between the opposing faces of the vertical members, there is no need to provide holes that penetrate the vertical members (columns) as in the past, which eliminates the complexity of construction. It is also possible to easily configure the structure when applying seismic reinforcement to wooden buildings.
In addition, since the internally threaded cylindrical part of the seat plate has a predetermined length, it is possible to change the threading length with the anti-buckling bolt, and the distance between the seat plates at both ends can be adjusted according to the distance between the facing surfaces of the vertical material. Adjustment is possible.
Furthermore, in the bracing structure of wooden buildings, the seat plate is fixed eccentrically with respect to the anti-buckling bolt, so the anti-buckling bolt passes through the center of the vertical member and is offset. For example, the board can be placed in a position (orientated) away from the indoor side, and this allows the edge of the washer to be placed on the indoor side even in the case of a Japanese-style room with a true wall finish where the sides of the vertical members are exposed on the indoor side. You can avoid exposure.

According to the bracing structure for a wooden building according to claim 2 of the present invention, the distance between the centers of the vertical members is constant and the cross-sectional sizes of the vertical members are variously different, or the distance between the facing surfaces of the vertical members is various. Even if they are different, interference between the anti-buckling bolt and the vertical member can be avoided by using the same bracing support, increasing versatility.

According to the bracing structure for a wooden building according to claim 3 of the present invention, when the braces are constructed of sashes, the anti-buckling bolt is sandwiched between the intersections of the pair of braces, and the pair of braces are connected in the thickness direction. By tightening, the anti-buckling bolt and the brace intersection can be integrally fixed with a small number of parts using only screws. In addition to the reinforcement structure provided by each of the pair of braces, a state in which the midway portion of the brace is connected and fixed to the vertical member by the brace support can be obtained, making it possible to further suppress buckling damage of each brace.

1 is a schematic perspective view showing a first embodiment of a bracing structure in a wooden building according to the present invention. It is a front view of a brace structure. It is an exploded perspective view of a brace support. It is an exploded perspective view of a brace support concerning a modification. 3 is a sectional view taken along line AA in FIG. 2. FIG. 3 is a sectional view taken along line BB in FIG. 2. FIG. It is an explanatory view showing an example of adjustment of a buckling prevention bolt. FIG. 2 is a plan cross-sectional view of a frame body in which brace supports are connected between columns. It is a front view of a frame in case a true wall is built. 9 is a sectional view taken along line CC in FIG. 9. FIG. 9 is a sectional view taken along line DD in FIG. 9. FIG. It is a schematic perspective view which shows 2nd Embodiment of the brace structure in the wooden building based on this invention.

Embodiments according to the present invention will be described below with reference to the drawings.
[First embodiment]
FIG. 1 is a schematic perspective view showing a first embodiment of a bracing structure for a wooden building according to the present invention.
Columns 15 as vertical members are connected between pairs of horizontal members located above and below, which serve as beams 11 and foundations 13, to form a rectangular frame 17. This frame body 17 has a long material whose end corners are cut off so as to match the corners of the joints that are the joints between the beam 11, the base 13, and each column 15. The braces 19 are fixed diagonally and diagonally. In this embodiment, the brace 19 is a so-called bifurcated column brace 19 having a dimension approximately 1/2 the thickness of the column 15, and is used flat. A brace support 23, which will be described later, is attached to the facing surface 21 of the paired pillars 15 at approximately 1/2 of the height in the height direction.

Further, in the first embodiment, a stud 25 that is vertical and parallel to the columns 15 is provided at an intermediate position between each column 15 . A rectangular notch 27 is formed in the middle of the stud 25, and the middle part of the brace 19 fits into the cutout 27 so that the notch 27 intersects with the stud 25.

One side surface at both ends of the brace 19 (back surface in FIG. 1) and one side surface of the pillar 15, beam 11, and base 13 (back surface in FIG. 1) are substantially flush with each other. On the other hand, the brace 19 has the other side surface (the front side in FIG. 1) at both ends approximately half the thickness of the column 15 than the other side surface (the front side in FIG. 1) of the column 15, beam 11, and foundation 13. It is offset to the rear side of the frame 17 by the size.

FIG. 2 is a front view of the bracing structure.
A brace plate 29 serving as a joining fitting is fixed to the other side surface at both ends of the brace 19 and the opposing surface 21 of the column 15 by spanning over these both surfaces. The brace plate 29 is for internal use. Internal use refers to the use of braced hardware in which hardware is placed near the inner corners. On the other hand, external use refers to the use of brace hardware in which the hardware is arranged so as to span the outer surfaces of the pillars 15, beams 11, and base 13.

When used internally (fixed near the inner corner), the effect of suppressing out-of-plane buckling of the brace 19 is smaller than when used externally. When constructing solid walls in a Japanese-style room, it has the advantage of avoiding interference with the wall base material, etc. In the bracing structure in the wooden building according to the first embodiment, by using internal bracing plates 29, it is possible to avoid interference with other members when constructing a solid wall. In the brace structure of a wooden building, the effect of suppressing out-of-plane buckling due to the use of internal brace plates 29 is reduced more than when using external brace hardware by providing the brace supports 23. In addition, improvements have been made so that a large out-of-plane buckling suppression effect can be obtained.

The brace support 23 is approximately parallel to the beam 11 and the base 13 and intersects with the brace 19 at a midway point, and is fixed at the intersection. It is strung across and fixed at both ends. The brace support 23 is roughly divided into an anti-buckling bolt 31, a seat plate 33, and a fixing bracket 35.

FIG. 3 is an exploded perspective view of the brace support 23. FIG. 4 is an exploded perspective view of a brace support 23 according to a modified example.
The anti-buckling bolt 31 is straight and has a male threaded portion 37 at the end. As an example, the anti-buckling bolt 31 may be a double-threaded bolt having male threads 37 at both ends and have a standard length of 780 mm. In addition, it is good also as a structure which has the male thread part 37 in one end, and the male thread part 37 is not formed in the other end. In this case, the seat plate 33 is directly fixed to the other end of the anti-buckling bolt 31 by welding or the like, as shown in FIG.

The seat plate 33 is formed, for example, as a square washer. The seat plate 33 is fixed to the opposing surfaces 21 of the two pillars 15 in the frame body 17 with screws 39. For this reason, the seat plate 33 is provided with a plurality of screw insertion holes 41 (for example, six). A base end of a female threaded cylinder portion 43 of a predetermined length that is screwed into the male threaded portion 37 is fixed to the seat plate 33 by welding or the like. A commercially available hexagonal nut may be used for the female threaded cylinder portion 43. Two seat plates 33 are required for one anti-buckling bolt 31.

In addition, in the example in which the seat plate 33 is directly fixed to the other end of the buckling prevention bolt 31 described above, the female threaded cylinder part 43 is not provided, and as shown in FIG. 4, the seat plate 33 is directly fixed to the buckling prevention bolt 31. Even in this case, the female threaded cylinder portion 43 is always fixed to one of the two seat plates 33.
That is, as shown in FIG. 3, the brace support 23 has a male threaded portion 37 at both ends of the anti-buckling bolt 31, and a seat plate 33 having a female threaded cylindrical portion 43 is screwed onto each end. As shown in FIG. 4, only one end of the anti-buckling bolt 31 has a male threaded portion 37, a seat plate having a female threaded cylindrical portion 43 is screwed and fixed to one end, and a seat plate is attached to the other end. 33 is directly fixed, and either one can be used.
The anti-buckling bolt 31 is mounted substantially horizontally so that the seat plates 33 at both ends are screwed to the facing surface 21 of each column 15, that is, spanned over.

Further, the seat plate 33 is provided with a through hole 45 through which the male threaded portion 37 screwed into the female threaded cylindrical portion 43 passes. For this reason, the anti-buckling bolt 31 is rotated in a direction in which the tip of the male threaded portion 37 approaches the seat plate 33, and after reaching the seat plate 33, is further rotated, so that the tip of the male threaded portion 37 is rotated through the through hole. 45 and protrudes from the back side of the seat plate 33. Thereby, the distance between the seat plates of the brace support 23 can be set to be smaller than the entire length of the anti-buckling bolt 31.

FIG. 5 is a sectional view taken along line AA in FIG.
The seat plate 33 is eccentrically fixed to the anti-buckling bolt 31. In other words, the central axis of the anti-buckling bolt 31 is eccentric from the center of the surface of the seat plate, and approximately half of one edge of the seat plate 33 is formed to extend with respect to the anti-buckling bolt 31. There is. The amount of eccentricity between the seat plate 33 and the anti-buckling bolt 31 is determined by two cases: when the seat plate 33 is screwed into the male threaded part 37 via the female threaded cylinder part 43, and when the seat plate 33 is fixed directly to the end of the anti-buckling bolt. The same is true if the The anti-buckling bolt 31 is arranged with respect to the column 15 at a position where the central axis passes through the center of the column 15. As a result, when the seat plate 33 is fixed to the opposing surface 21 of the column 15, approximately half of the seat plate 33 is eccentrically shifted toward the rear side, which is one side in the width direction of the opposing surface 21. Note that the front side surface of the brace 19 is offset from the center line 49 of the column 15 by the radius of the anti-buckling bolt 31, as shown by the imaginary line 47 in FIG. Therefore, the outer periphery of the anti-buckling bolt 31 contacts the side surface of the brace 19 at the intersection with the brace 19.

FIG. 6 is a sectional view taken along line BB in FIG.
The anti-buckling bolt 31 whose both ends are screwed into the internally threaded cylindrical part 43 or whose one end is screwed into the internally threaded cylindrical part 43 and whose other end is directly fixed to the seat plate 33 intersects with the brace 19. At this point, it is fixed to the side surface of the brace 19 by two fixing brackets 35. The fixing bracket 35 is a substantially Ω-shaped member with mounting ears at both ends and a curved part in the middle.The middle part of the buckling prevention bolt 31 is fitted into the curved part, and both mounting ears are fixed using screws, nails, etc. and fix it to brace 19.

FIG. 7 is an explanatory diagram showing an example of adjustment of the buckling prevention bolt 31.
The distance between the centers of adjacent pillars 15 is generally set at 910 mm in wooden buildings. The cross-sectional size of each pillar 15 changes depending on the installation position, that is, 105 x 105 (105 square), 105 x 120, 105 x 180, etc. are used. That is, the distance between the pillar opposing surfaces varies depending on the cross-sectional size of the pillar 15 and the like. The brace support 23 can be adjusted by adjusting the threaded length of the male threaded part 37 and the female threaded cylindrical part 43 even for such different inter-column distances.For example, when the length of the buckling prevention bolt 31 is set to 780 mm, However, we can respond flexibly. In other words, it has high versatility.

For example, as shown in FIG. 7A, when both columns 15 are 105×105 (105 squares), the center of the column is 52.5 mm, and the distance between the opposing surfaces of the columns 15 is 805 mm. In this case, since the length of the anti-buckling bolt 31 is longer than 780 mm, the threaded state of the female threaded cylinder part 43 is adjusted to the male thread part 37 at both ends to adjust the distance between the seat plates 33 to 805 mm, and It is screwed to the opposing surface 21 of the pillar 15.
As shown in FIG. 7(b), when the pillars 15 are 105 square and 105×120, the center of one pillar 15 is 60 mm, and the distance between the opposing surfaces of the pillars is 797.5 mm. In this case as well, the screwing state of the internally threaded cylindrical portions 43 is adjusted at both ends of the anti-buckling bolt 31, and screwed onto the respective opposing surfaces 21, as described above.

As shown in FIG. 7(c), in the case of 105 squares and 105×180, the center of one pillar 15 is 90 mm, and the distance between the pillar opposing surfaces is 767.5 mm. In this case, since the distance is shorter than the length of the anti-buckling bolt 31, which is 780 mm, a hole is drilled in one of the columns 15 so that a recess 51 with a depth of about 15 mm is formed, and the end of the anti-buckling bolt 31 is The end of the anti-buckling bolt 31 is adjusted so that it protrudes from the through hole 45 of the seat plate 33, the distance between the seat plates is adjusted to the distance between the opposing surfaces, and the end of the anti-buckling bolt 31 protrudes through the seat plate 33. are inserted into the recesses 51, and each seat plate 33 is screwed to the opposing surface 21.
As shown in FIG. 7(d), in the case of 105 square and 105 x 180, the center of one of the pillars 15 is eccentric and the center swing of the pillar 15 with a width of 180 mm is 127.5 mm to the left - 52.5 mm to the right. The distance between the column facing surfaces is 730 mm. In this case, similarly to the above, drilling is required to form a recess 51 with a depth of 50 to 55 mm in one of the pillars 15, and the end of the anti-buckling bolt 31 protrudes from the through hole 45 of the seat plate 33. Adjust the screws so that the distance between the seat plates matches the distance between the opposing surfaces, and insert the end of the anti-buckling bolt 31 that protrudes through the seat plate 33 into the recess 51 to tighten each seat. The plate 33 is screwed to the opposing surface 21.

As described above, according to the bracing structure in a wooden building, when the distance between the column facing surfaces 21 is shorter than the length of the anti-buckling bolt 31, the male threaded portion 37 is passed through the seat plate 33, and the column This can be accommodated by providing a recess 51 with a predetermined depth on the side.

Next, the operation of the above configuration will be explained.

In the brace structure in the wooden building according to the present embodiment, the brace support 23 is located halfway in the height direction of the column 14, which is a vertical member, and spans the column 15. In the brace support 23, both ends of an anti-buckling bolt 31 are fixed to the facing surface 21 of the column 15 with screws. That is, the anti-buckling bolt 31 has a male threaded portion 37 at at least one end. The male threaded portion 37 is screwed into the female threaded cylindrical portion 43 . The female threaded cylinder portion 43 has a base end fixed to the seat plate 33 by welding or the like. The seat plate 33 to which the female threaded cylindrical portion 43 is fixed is fixed to the opposing surface 21 of the column 15 with screws. The brace support 23 can adjust the distance between the seat plates 33 at both ends to match the distance between the columns 15 by relatively rotating the male threaded portion 37 and the female threaded cylindrical portion 43 of the anti-buckling bolt 31. . Since it has a threaded structure, fine adjustment is possible when the male threaded portion 37 is screwed onto the female threaded cylinder portion 43. Thereby, the brace support 23 can be connected between the columns 15 by adjusting each threaded portion even if the distance between the column facing surfaces 21 changes due to different sizes of the columns 15. Even if the spacing between the pillars 15 becomes small relative to the length of the anti-buckling bolt 31 and it becomes necessary to dig a spot in the facing surface 21, the finished part will not be visible, so the appearance will be improved. It will not deteriorate.

In the braced structure of a wooden building, when an external force such as an earthquake is applied and a compressive force is applied to the braces 19, the braces 19 will bend in the middle and try to bend, but the brace supports 23 will bend. This suppresses deflection and supports the brace 19. As a result, although the braces 19, which are reinforcing materials, undergo bending deformation, they do not suffer from buckling damage, and it is possible to obtain a wooden building with improved durability. Therefore, even if the brace joint is used internally (fixed near the inner corner), a wooden building with improved durability can be obtained.

FIG. 8 is a plan cross-sectional view of the frame 17 in which brace supports 23 are connected between each column.
In the brace structure in a wooden building, the brace support 23 can have buckling prevention bolts 31 arranged continuously between each column. That is, since both ends of the anti-buckling bolt 31 are screwed to the opposing surface 21 of the column 15 by the seat plate 33, it can be further disposed between the opposing surfaces between the other columns 15. The anti-buckling bolt 31 does not interfere. Therefore, the buckling prevention bolts 31 can be successively attached to the brace support 23 between each column 15, that is, the brace supports 23 can be connected in series. This makes it possible to reinforce all of the braces 19 that make up the wooden building.

FIG. 9 is a front view of the frame 17 when the true wall 53 is constructed. FIG. 10 is a sectional view taken along line CC in FIG. FIG. 11 is a sectional view taken along line DD in FIG.
Furthermore, the brace structure in a wooden building can be applied even when a straight wall 53 (see FIG. 10) is constructed in a Japanese-style room or the like. As shown in FIG. 9, when a true wall 53 is constructed in the frame 17, a supporting material 55 for supporting a base material for the true wall (for example, a plaster boat, etc.) is fixed to the opposing surface 21 of the pillar 15. .

As shown in FIG. 10, the true wall 53 can be constructed, for example, as a painted wall in which diatomaceous earth or the like is applied to the surface of a gypsum boat or the like fixed to the support member 55. At this time, the finished surface of the true wall 53 is located closer to the center of the column than the front of the column 15. That is, the front side of each pillar 15 is exposed. Even in the case of such a true wall specification, in the bracing structure of a wooden building, the seat plate 33 is fixed eccentrically to the anti-buckling bolt 31, as shown in FIG. Even if the seat plate 33 passes through the center of the pillar 15, the seat plate 33 can be disposed at a position away from the indoor side. Thereby, even in the case of a Japanese-style room with a solid wall finish where the front of the pillar 15 is exposed to the indoor side, a part of the washer 33 can be prevented from being exposed to the indoor side.

In addition, in this bracing structure for a wooden building, the seat plate 33 that fixes the base end of the female threaded cylindrical portion 43 has a through hole 45 through which the male threaded portion 37 screwed with the female threaded cylindrical portion 43 can pass. There is. That is, when the male threaded portion 37 is screwed together for a longer length than the entire length of the female threaded cylinder portion 43, it can be made to protrude from the through hole 45 of the seat plate 33. A recess 51 into which the end of the anti-buckling bolt 31 protruding from the through hole 45 enters is bored in the opposing surface 21 of the column 15 to which the seat plate 33 is fixed with screws.

This allows for cases where the distance between the centers of the columns 15 is constant (for example, 910 mm) and the cross-sectional sizes of the columns 15 vary (for example, 105 mm, 105 x 120 mm, 150 x 180 mm), or when the distance between the opposing surfaces of the columns 15 varies. Even if the diameters are different (805 mm, 797.5 mm, 767.5 mm, 730 mm), it is possible to avoid interference between the anti-buckling bolt 31 and the column 15 and attach the brace support 23 to the opposing surface 21 of the column 15. can. As a result, even if the distance between the centers of the columns 15 is constant and the cross-sectional sizes of the columns 15 vary, or the distances between the opposing surfaces of the columns 15 vary, the same brace support 23 can be used. Therefore, interference between the anti-buckling bolt 31 and the column 15 can be avoided, and versatility can be improved.

Next, a second embodiment of the brace structure for a wooden building according to the present invention will be described.
FIG. 12 is a schematic perspective view showing a second embodiment of the bracing structure for a wooden building according to the present invention.
The brace structure according to the second embodiment is a case where the brace 19 is a sash. That is, two braces 19 are spanned across the frame 17 along two diagonal lines. An anti-buckling bolt 31 is arranged at a brace intersection between a pair of intersecting braces 19. The anti-buckling bolt 31 is fixed by being sandwiched between the pair of braces 19 by fastening the braces 19 in the thickness direction at the intersection of the braces. In addition, in this 2nd embodiment, the stud 25 is divided into upper and lower parts in the longitudinal direction center, and is attached to a brace intersection part.

In the brace structure according to the second embodiment, when the brace 19 is a sash, the anti-buckling bolt 31 of the brace support 23 is sandwiched from both sides. In the anti-buckling bolt 31, the braces 19 sandwiched from both sides are fastened to each other by, for example, two screws 39 on one side and a total of four screws 39 on both sides. The double-sided hammering of the screw 39 at the longitudinal center where the pair of braces intersect is such that the screw 39 does not overlap and interfere with the front and back surfaces. As described above, in the brace structure in a wooden building, the anti-buckling bolt 31 may be fixed to the brace 19 using the fixing bracket 35 at the intersection with the brace 19, and at the brace intersection where a pair of braces intersect. It may be fixed by being sandwiched from both sides.

As a result, the anti-buckling bolt 31 is sandwiched between the braces 19 on the front and back, and is integrally fixed at the center in the longitudinal direction where the pair of braces intersect. As a result, the anti-buckling bolt 31 and the brace intersection can be integrally fixed using only the screws 39 with a small number of parts.

Therefore, according to the brace structure in the wooden building according to the present embodiment, the buckling deformation of the braces 19 is suppressed by the brace supports 23, and the braces 19 are stretched between the columns 15 without penetrating them. By providing the anti-brace bolt 31, the brace supports 23 can be further provided between the other columns 15, that is, the brace supports 23 can be connected between each column. This makes it possible to reinforce all of the braces 19 that make up the wooden building. In addition, since the seat plate 33 is fixed between the facing surfaces 21 of the pillars 15, there is no need to provide holes penetrating the pillars 15 as in the conventional case, which eliminates the complexity of construction. It is also possible to easily construct a structure when applying seismic reinforcement to a building.
In addition, since the internally threaded cylindrical portion 43 of the seat plate 33 has a predetermined length, it is possible to change the screwing length with the anti-buckling bolt 31, and the length of the threaded part 43 of the seat plate 33 can be adjusted to match the distance between the opposing surfaces 21 of the column 15. The distance between the seat plates 33 can be adjusted.
Further, since the seat plate 33 is fixed eccentrically with respect to the buckling prevention bolt 31, the buckling prevention bolt 31 is placed in a biased position while passing through the center of the column 15, and the seat plate 33 is fixed to the center of the pillar 15, for example. It can be placed in a position (orientation) away from the inside, so that even in the case of a Japanese-style room with a solid wall finish where the side surfaces of the pillars 15 are exposed to the inside, the edge of the washer 33 is not exposed to the inside. It can be done.

Furthermore, according to the bracing structure in a wooden building, the distance between the centers of the columns 15 is constant, but the cross-sectional sizes of the columns 15 are variously different, and the distances between the opposing surfaces 21 of the columns 15 are variously different. Also, by using the same brace support 23, interference between the anti-buckling bolt 31 and the column 15 can be avoided, and versatility can be increased.
Furthermore, according to the brace structure in a wooden building, when the braces 19 are composed of sashes, the anti-buckling bolts 31 are sandwiched between the intersections of the pair of braces 19, and the pair of braces 19 are fastened together in the thickness direction. Thus, the anti-buckling bolt 31 and the brace intersection can be integrally fixed with a small number of parts using only screws. In addition to the reinforcement structure provided by each of the pair of braces 19, a state in which the middle part of the brace is connected and fixed to the column 15 by the brace support 23 can be obtained, and it is possible to further suppress buckling damage of each brace 19. Become.

11...Horizontal member (beam)
13...Horizontal material (foundation)
15...Vertical material (column)
17...Frame body 19...Brace 21...Opposing surface 23...Brace support 31...Buckling prevention bolt 33...Seat plate 37...Male thread portion 43...Female thread cylinder portion 45...Through hole

Claims (3)

A brace structure in a wooden building in which braces are fixed to the joints of a rectangular frame composed of vertical members and horizontal members,
It is substantially parallel to the horizontal member, intersects with the middle part of the brace, and is fixed to the brace at the intersection part, and is located halfway in the height direction of the vertical member between the opposing surfaces of the vertical member. Equipped with a brace support that is spanned over and fixed at both ends,
The brace support is
An anti-buckling bolt having a male thread at the end;
At least a seat plate having a female threaded cylinder portion of a predetermined length that is screwed into the male threaded portion,
The seat plate is configured such that the central axis of the anti-buckling bolt is eccentric from the center of the plate surface, and the center of the anti-buckling bolt is aligned with the center of the vertical member and fixed to the opposing surface of the vertical member, A brace structure for a wooden building, characterized in that the brace is fixed to one side in the width direction of the opposing surface. The bracing structure for a wooden building according to claim 1, wherein the seat plate has a through hole through which the male screw portion passes. The buckling prevention bolt is arranged between a pair of intersecting braces, and the pair of braces are fastened together in the thickness direction, so that the braces are sandwiched between the pair of braces and The bracing structure for a wooden building according to claim 1 or 2, wherein the intersections of the anti-bending bolts are fixed.

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