Brace fixture and brace fitting structure

Abstract

To provide a brace fixture capable of being fitted to a surface perpendicular to a structural surface of a member forming the structural surface of a building, and capable of connecting two versatile braces of arbitrary sizes at different arbitrary angles.SOLUTION: A brace fixture can be fitted to a front surface of a girder forming a first horizontal structural surface and a second horizontal structural surface of a building. The brace fixture has a fitting piece having a surface abutting against the front surface 2F and a connecting piece to connect one end of a first brace and an end of a second brace. The fitting piece and the connecting piece are formed by bending a piece of metallic flat plate at right angle. A plurality of left screw holes and right screw holes to fix the fitting piece to the front surface with left screws and right screws are provided on the fitting piece. A first bolt hole into which a first bolt for fixing one end of the first brace to the connecting piece at arbitrary angle is inserted, and a second bolt hole into which a second bolt to fix one end of the second brace to the connecting piece at arbitrary angle is inserted, are provided on the connecting piece.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a brace fixing fitting used for attaching braces or cross members to the frameworks of various buildings such as wooden buildings, and a brace attachment structure using the brace fixing fitting.

Background Art

[0002] In a building, a two-dimensional frame (framework) called a framework is formed by columns, horizontal members, frame members, etc., and braces or cross members (hereinafter referred to as "braces, etc.") are attached to the diagonals thereof to improve the seismic resistance of the framework. When attaching braces, etc. to the framework, various proposals have been made from the viewpoints of seismic resistance, constructability, ease of attachment, etc.

[0003] For example, in Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-346499), in a building structure 1 configured with a structural surface 2 formed in a substantially rectangular shape by columns 3, beams 4, etc., the structural surface 2 consists of two upper structural surfaces 2A composed of three columns 3 and the upper beam 4A and intermediate beam 4B of the beam 4, and two lower structural surfaces 2B composed of three columns 3 and the intermediate beam 4B and lower beam 4C. The reinforcing device 10 is attached to the end sides in different directions of the upper beam 4A, intermediate beam 4B, and lower beam 4C that respectively constitute the upper and lower two structural surfaces 2A and 2B. The reinforcing device 10 is configured to include a pair of fixing means 11 and braces 20. The fixing means 11 includes various types such as fixing means 11A and 11C where two braces 20 are provided, and fixing means 11B, 11D, 11E, and 11F where one brace 20 is provided. Fixing means 11A and 11B, fixing means 11C and 11D, fixing means 11A and 11E, and fixing means 11C and 11F each form a pair. The fixing means 11A to 11F have exactly the same configuration except that the number of braces 20 attached and the attachment angle are different. The fixing means 11A includes a pair of clamping members 12 composed of a surface member 13 and a back member 14, and a cylindrical brace attachment member 15. The brace attachment member 15 is attached to the surface of the surface member 13 by welding or the like. Four cylindrical members 16 through which fixing bolts 17 are inserted are attached near the outer periphery of the surface member 13. Horizontal holes 15A and 15B for attaching braces are formed on the side surface of the brace attachment member 15. A structural surface reinforcing device of a structure is disclosed.

[0004] However, in the structural surface reinforcing device of the structure in Patent Document 1, since the fixing means 11 is attached to the surface side of the beam 4 (upper beam 4A, intermediate beam 4B, lower beam 4C), that is, a plane parallel to the structural surface 2, there is a problem that the fixing means 11 protrudes in the vertical direction from the structural surface 2 and hinders the attachment of a facing material or the like along the structural surface 2. Further, the fixing means 11 (11A) of Patent Document 1 has a complex structure composed of a pair of clamping members 12 composed of a surface member 13 and a back member 14, a cylindrical brace attachment member 15, and four cylindrical members 16. Not only is the processing time-consuming, but also there is a problem that the attachment work takes time because the beam 4 is sandwiched between the surface member 13 and the back member 14 for attachment. Furthermore, the fixing means 11 of Patent Document 1 is composed of six types, namely 11A, 11B, 11C, 11D, 11E, and 11F, with different structures, and there is a problem that its handling and management become complicated.

[0005] Next, Patent Document 2 (Japanese Patent Application Laid-Open No. 2005-213905) discloses a joining structure of wooden three-story residential members. In the first-floor column base portion, the anchor bolts pull the column 8 by the draw hardware 2, and further, it is joined to the base fastening hardware 1, the diagonal member 3, and the turnbuckle 10. In the second and third (intermediate) floors, after joining the draw flat hardware 4 to the column base of the upper floor with a screw vis or the like, a tensile force is applied to the diagonal member 3 of the lower floor by the turnbuckle 10, and then the column head is joined. On the rooftop floor, after joining the draw flat hardware 4 to the horizontal member with a screw vis 11 or the like, a tensile force is applied in the same manner as above, and then it is joined to the column head. A joining structure of residential members is disclosed. However, in the joining structure of the residential members of Patent Document 2, since the draw flat hardware 4 is attached to the surface of the column and the horizontal member that straddles the column and the horizontal member and is parallel to the plane formed by the column and the horizontal member, there is a problem that it hinders the attachment of the facing material or the like along the plane formed by the column and the horizontal member, similar to Patent Document 1. Also, in the joining structure of the residential members of Patent Document 2, there are two types of draw flat hardware 4 for joining two upper and lower diagonal members 3 in the intermediate floor and four types for joining four upper and lower diagonal members 3. On the rooftop floor, there are two types of draw flat hardware 4 for joining one lower diagonal member 3 and two types for joining two lower diagonal members 3. Four types of draw flat hardware 4 are required, and there is a problem that its handling and management become complicated, similar to Patent Document 1.

[0006] Here, Patent Document 3 (Japanese Patent Application Laid-Open No. 2006-37704) discloses a shear wall structure of a steel house that is composed of an upper frame member 2, a lower frame member 3, a pair of vertical frame members 4, 4, and brace members 5. The pair of vertical frame members 4, 4 are each composed of a combination of four channel steels. Between the upper frame member 2 and the lower frame member 3, vertical members are erected at a predetermined interval in the horizontal direction. The brace members 5 (5A, 5B, 5C, 5D, 5E, 5F, 5G) are joined to the pair of vertical frame members 4, 4 at both ends through joining members 7 provided on the outer web surfaces of the pair of vertical frame members 4, 4 by tapping screws S. Triangular structural surfaces P (P1, P2...) are formed by the brace members 5, 5 adjacent to each other vertically and a part of the vertical frame member 4. The joining member 7 is made of a short lightweight channel steel, with its groove facing the brace member 5 side, and its web 7a is fixed by tapping screws S in a state of being in contact with the outer web surface of the vertical frame member 4 (4c). The brace member 5 is made of lightweight channel steel, and the outer width of the web of the brace member 5 is substantially equal to the inner width of the groove of the joining member 7. One end of the brace member 5 is fitted into the groove of the joining member 7, and the flange 5a of the brace member 5 and the flange 7b of the joining member 7 are joined by tapping screws S. In this Patent Document 3, the joining member 7 is attached to the surface of the vertical frame member 4 perpendicular to the structural surface formed by the upper frame member 2, the lower frame member 3, and the pair of vertical frame members 4, 4 so as not to prevent the attachment of a facing material or the like along the structural surface.

[0007] However, in the shear wall structure of the steel house of Patent Document 3, since the joining member 7 is fixed by tapping screws S in a state where its web 7a is in contact with the outer web surface of the vertical frame member 4, and one end of the brace member 5 is fitted into the groove of the joining member 7, and the flange 5a of the brace member 5 and the flange 7b of the joining member 7 are joined by tapping screws S, the attachment angles of the upper and lower brace members 5 attached to the joining member 7 are fixed, and the attachment position of the joining member 7 to the vertical frame member 4 is also fixed. As a result, the shape and size of the structural surface formed by the upper frame member 2, the lower frame member 3, and the pair of vertical frame members 4, 4 are fixed, and there is a problem that the brace member 5 cannot be attached to a structural surface of an arbitrary shape and size. In addition, in Patent Document 3, the brace member 5 is made of a channel steel with its shape and size restricted, i.e., the outer width is substantially equal to the inner width of the groove of the joint member 7, and there is a problem that braces with various sizes and general applicability, such as round steel braces, cannot be used.

[0008] Next, in Patent Document 4 (Utility Model Registration No. 3124832), there are corner fittings 6 fixed along the corners of the base 3 and one column 4a and the girder member 5 and one column 4a, an intermediate fitting 7 fixed in the middle of the other column 4b, and between one column 4a and the other column 4b, an upper cross-member 8 arranged in an inclined state between the upper corner fitting 6 and the intermediate fitting 7 and a lower cross-member 8a arranged in an inclined state between the lower corner fitting 6 and the intermediate fitting 7. The intermediate fitting 7 is formed by welding a flat U-shaped fitting 26 provided with a pair of side plates 25 facing both sides of the mounting plate 24 on the outer surface of a vertically long base plate 23 that overlaps the outer surface of the other column 4b. Bolt holes 27 are provided at the positions between the two side plates 25 in the middle of the upper and lower parts of the base plate 23 and the mounting plate 24. A square block 29 having bolt holes 28 is fixed by welding to the back surface of the base plate 23. Wall frame seismic reinforcement structures with bolt holes 30 provided at the upper and lower positions of both side plates 25 are disclosed.

[0009] However, the seismic reinforcement structure of the wall frame in Patent Document 4 is limited to a structure in which cross-members 8 and 8a are attached between the corners of the base 3 and one column 4a and the girder member 5 and one column 4a and the middle (intermediate part) of the other column 4b, and it is not possible to form a structure in which braces can be attached at arbitrary positions on a structural surface of arbitrary size and shape. Also, in Patent Document 4, since the intermediate fitting 7 is formed by welding the flat U-shaped fitting 26 to the outer surface of the base plate 23, it has a somewhat complicated structure, which not only takes time in processing, but also has a problem that the width of the connection ring 39 of the upper cross-member 8 and the lower cross-member 8a attached to the intermediate fitting 7 is limited by the interval between the two side plates 25 of the flat U-shaped fitting 26, and it is not possible to attach cross-members (braces) with an arbitrary size (thickness) to the attachment part.

[0010] Furthermore, Patent Document 5 (Japanese Patent Application Laid-Open No. 2022-155956) discloses a connection structure between a column and a brace, which includes a beam 11, a base 14, a pair of columns 12 and 13, and two braces 21 in a K shape when viewed from the front. At the central position of one column 13, a connecting fitting 50 is connected via four fixed means 40 with heads. Gusset plates 17 are respectively attached to the corner portions 19 of the other column 12, the beam 11, and the base 14. Connecting jigs 22 at both ends of the brace 21 are connected to the connecting fitting 50 and the gusset plate 17 via connecting bolts 18. The connecting fitting 50 includes a contact plate 51 in a rectangular shape in plan view that abuts against the side surface 13a of the column 13, a standing plate 52 that stands upright from the contact plate 51, and four reinforcing ribs 53 that project laterally from the left and right side surfaces (left and right wide surfaces) of the standing plate 52. However, the connection structure between the column and the brace in Patent Document 5 is limited to a structure in which the brace is connected to the central position of one column 13 and the corner portions 19 of the other column 12, the beam 11, and the base 14, similar to Patent Document 4, and cannot be a structure in which the brace is attached to an arbitrary position on a structural surface of any size and shape. In addition, in Patent Document 5, the connecting fitting 50 has a complex structure including the contact plate 51, the standing plate 52, and the four reinforcing ribs 53, and there is a problem that it takes time and effort to process.

Prior Art Documents

Patent Documents

[0011]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Summary of the Invention

Problems to be Solved by the Invention

[0012] The problem to be solved by the present invention is to provide a brace fixing fitting that can be attached to a surface perpendicular to the surface of a member forming a building surface, can be formed by bending a single metal flat plate, and can connect two general-purpose braces of any size at any different angles, and a brace mounting structure using this brace fixing fitting.

Means for Solving the Problem

[0013] The invention according to claim 1 is a brace fixing fitting that can be attached to a vertical surface, which is a surface perpendicular to the surface of a longitudinal member forming a building surface, and has a mounting piece having a surface that abuts against the vertical surface, and a connecting piece that connects one end of a first brace and one end of a second brace. The mounting piece and the connecting piece are formed by bending a single metal flat plate at a right angle. The mounting piece is provided with a plurality of holes for linear members for fixing the mounting piece to the vertical surface with a linear member. The connecting piece is provided with a first insertion hole through which a first rod-shaped member for fixing one end of the first brace to the connecting piece at an arbitrary angle is inserted, and a second insertion hole through which a second rod-shaped member for fixing one end of the second brace to the connecting piece at an arbitrary angle is inserted, to solve the above problem.

[0014] The invention according to claim 2 provides a brace fixing fitting in which rising pieces formed by bending the metal flat plate at a right angle are provided at longitudinal ends of the longitudinal member of the mounting piece and the connecting piece, to solve the above problem.

[0015] The invention according to claim 3 provides a brace fixing fitting in which a rectangular notch is provided on a short-side end side of the longitudinal member of the mounting piece, to solve the above problem.

[0016] The invention according to claim 4 provides a brace fixing fitting in which the first insertion hole is provided on one end side in the longitudinal direction of the connection piece, and the second insertion hole is provided on the other end side in the longitudinal direction of the connection piece, and solves the above problems.

[0017] The invention according to claim 5 provides a brace fixing fitting in which the linear member is a bolt that engages with a nut and a screw that is screwed into the longitudinal member, and the hole for the linear member consists of a bolt hole through which the bolt passes and a screw hole through which the screw passes, and solves the above problems.

[0018] The invention according to claim 6 provides a brace fixing fitting in which the first rod-shaped member is a first bolt, the first insertion hole is a first bolt hole through which the first bolt passes, the second rod-shaped member is a second bolt, the second insertion hole is a second bolt hole through which the second bolt passes, and the first brace and the second brace are round steel braces, and solves the above problems.

[0019] The invention according to claim 7 is a brace mounting structure that is mounted on a vertical surface, which is a surface perpendicular to the surface of a longitudinal member forming a building surface, via a brace fixing fitting. The brace fixing fitting has a mounting piece having a surface that abuts against the vertical surface and a connection piece that connects one end of a first brace and one end of a second brace. The mounting piece and the connection piece are formed by bending a single metal flat plate at a right angle. The mounting piece is fixed to the vertical surface by a plurality of linear members that pass through holes for the linear members provided in the mounting piece. One end of the first brace is fixed to the connection piece at an arbitrary angle by a first rod-shaped member that passes through a first insertion hole provided in the connection piece. One end of the second brace is fixed to the connection piece at an arbitrary angle by a second rod-shaped member that passes through a second insertion hole provided in the connection piece, and solves the above problems.

[0020] The invention according to claim 8 provides a brace mounting structure in which the surface is partitioned into a first surface and a second surface by another longitudinal member attached to the vertical surface, the brace fixing fitting is attached to the vertical surface straddling the other longitudinal member, the first brace is laid across the first surface, and the second brace is laid across the second surface, thereby solving the above problems.

[0021] The invention according to claim 9 provides a brace mounting structure in which the linear member is a bolt that engages with a nut and a screw that is screwed into the longitudinal member, the hole for the linear member consists of a bolt hole through which the bolt passes and a screw hole through which the screw passes, the first rod-shaped member is a first bolt, the first insertion hole is a first bolt hole through which the first bolt passes, the second rod-shaped member is a second bolt, and the second insertion hole is a second bolt hole through which the second bolt passes, thereby solving the above problems.

[0022] The invention according to claim 10 provides a brace mounting structure in which one end of the first brace is fixed to the connecting piece so as not to interfere with another brace laid across the first surface, and one end of the second brace is fixed to the connecting piece so as not to interfere with another brace laid across the second surface, thereby solving the above problems.

Advantages of the Invention

[0023] In the brace fixing fitting of the invention according to claim 1, the brace fixing fitting can be firmly fixed to a vertical surface, which is a surface perpendicular to the surface of a building, by a linear member inserted through a plurality of holes for the linear member provided in the mounting piece. One end of the first brace is fixed to the connecting piece by a first rod-shaped member inserted through the first insertion hole provided in the connecting piece, and one end of the second brace is fixed to the connecting piece by a second rod-shaped member inserted through the second insertion hole provided in the connecting piece. Therefore, two general-purpose braces of any size can be connected and fixed to the brace fixing fitting at any different angles, which has the effect of being able to do so.

[0024] In the brace fixing fitting of the invention according to claim 2, further, due to the rising piece provided at the longitudinal end of the longitudinal member of the mounting piece and the connecting piece, the resistance to a large combined force of bending, tension, shear, torsion, etc. of the mounting piece and the connecting piece is increased.

[0025] In the brace fixing fitting of the invention according to claim 3, further, due to the rectangular notch provided on the short-side end side of the longitudinal member of the mounting piece, the mounting piece can be mounted at a certain height of the vertical plane.

[0026] In the brace fixing fitting of the invention according to claim 4, further, the first brace can be connected and fixed to one end side in the longitudinal direction of the connecting piece, and the second brace can be connected and fixed to the other end side in the longitudinal direction of the connecting piece.

[0027] In the brace fixing fitting of the invention according to claim 5, further, the mounting piece can be fixed to the vertical plane with bolts and nuts having high withdrawal resistance and toughness, and screws that improve rigidity with high resistance to initial or early displacement, and can be stably fixed without suddenly losing resistance.

[0028] In the brace fixing fitting of the invention according to claim 6, further, a general-purpose round steel brace can be fixed to the connecting piece with a general-purpose bolt.

[0029] In the brace mounting structure according to claim 7, a brace fixing fitting can be firmly fixed to a vertical plane, which is a plane perpendicular to the building structure surface, by a linear member inserted through a plurality of linear member holes provided in the mounting piece. One end of the first brace is fixed to the connecting piece by a first rod-shaped member inserted through a first insertion hole provided in the connecting piece, and one end of the second brace is fixed to the connecting piece by a second rod-shaped member inserted through a second insertion hole provided in the connecting piece. Therefore, two general-purpose braces of any size can be connected and fixed to the brace fixing fitting at any different angles.

[0030] In the brace mounting structure of the invention according to claim 8, further, a first brace extending across the first plane and a second brace extending across the second plane can be connected and fixed to the same brace fixing fitting, which has the effect of enabling this.

[0031] In the brace mounting structure according to claim 9, further, the mounting piece can be fixed to the vertical plane with bolts and nuts having high withdrawal resistance and toughness and screws having high resistance to initial or early displacement and improving rigidity, and it can be stably fixed without a sudden drop in strength, and a general-purpose round steel brace can be fixed to the connecting piece with a general-purpose bolt, which has the effect of enabling this.

[0032] In the brace mounting structure according to claim 10, further, wear due to interference between the first brace, the second brace, and other braces is prevented, and a decrease in the strength of the first brace and the second brace can be prevented, which has the effect of enabling this.

Brief Description of the Drawings

[0033]

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Embodiments for Carrying Out the Invention

[0034] [Configuration of Brace Attachment Structure] FIG. 1 is a perspective view showing the configuration of a brace attachment structure according to an embodiment of the present invention, FIG. 2 is a plan view of the brace attachment structure shown in FIG. 1, FIG. 3 is a front view of the brace attachment structure shown in FIG. 1, FIG. 4 is a perspective view of the brace attachment structure shown in FIG. 1 with bolts, screws, etc. removed from the brace fixing bracket, FIG. 5 is a perspective view of the brace fixing bracket shown in FIG. 1, and FIGS. 6(a), (b), and (c) are the plan view, front view, and right side view of the brace fixing bracket shown in FIG. 1, respectively. In the figure, 1 is the brace mounting structure, 2 is the main beam, 2F is the front of the main beam, 2u is the upper surface of the main beam, 3 is the secondary beam, 3b is the bottom surface of the secondary beam, 4 is the first brace, 5 is the second brace, 4a1 and 5a1 are fin plates, 4ah1 and 5ah1 are bolt holes, 4b1 and 5b1 are round steel bars, 10 is the brace fixing fitting, 11 is the connecting piece, 11h1 is the first bolt hole, 11h2 is the second bolt hole, 12 is the mounting piece, 12h1 is the left bolt hole, 12h2 is the right bolt hole, 12k is the notch, 12p is the left screw hole group, 12ph is the left screw hole, 12q is the right screw hole group, 12qh is the right screw hole, 13L is the left rising piece, 13R is the right rising piece, 14a is the left bolt, 15a is the right bolt, 14b and 15b are nuts, 16a is the first bolt, 17a is the second bolt, 16b and 17b are nuts, 18 is the left screw group, 18a is the left screw, 19 is the right screw group, 19a is the right screw, HD1 is the first horizontal plane, HD2 is the second horizontal plane. In the figure, X is the direction (left - right direction) along the axial direction (longitudinal direction) of the main beam 2, Y is the direction (front - back direction) perpendicular to the X direction and the horizontal direction, Z is the direction (up - down direction) perpendicular to the horizontal plane (XY plane). In FIGS. 1 to 3, the secondary beam 3 is represented by a two - dot chain line which is a virtual line, and in FIG. 4, the secondary beam 3 is omitted.

[0035] As shown in FIGS. 1 to 4, in the brace mounting structure 1, one end of the first brace 4 and one end of the second brace 5 are attached via the brace fixing fitting 10 attached to the front 2F of the main beam 2 (the vertical plane of the present invention), which is a plane perpendicular to the plane formed by the main beam 2 and the secondary beam 3. The main beam 2 is the longitudinal member of the present invention and is a beam assembled to the columns of buildings such as wooden houses. The secondary beam 3 is a beam spanned between the main beam 2 and another main beam facing the main beam 2. For the main beam 2 and the secondary beam 3, wooden materials such as hinoki (Japanese cypress), hiba (Japanese cypress leaf), sugi (Japanese cedar), etc. are used, but materials other than wood, such as metals like carbon steel and aluminum, may also be used. Also, so that the upper surface 2u of the main beam 2 and the upper surface of the secondary beam 3 are on the same plane, that is, with the upper surface 2u of the main beam 2 as the reference plane of height (Z direction), the secondary beam 3 is assembled to the front 2F of the main beam 2 at a right angle or nearly at a right angle. Then, a first horizontal structure plane HD1 is formed by the main beam 2, another main beam disposed opposite to the main beam 2 on the front 2F side of the main beam 2, the secondary beam 3, and another secondary beam spanning between the main beam 2 and the other main beam opposite to the secondary beam 3 on the left side of the secondary beam 3. A second horizontal structure plane HD2 is formed by the main beam 2, the other main beam, the secondary beam 3, and another secondary beam spanning between the main beam 2 and the other main beam opposite to the secondary beam 3 on the right side of the secondary beam 3. Also in this case, the upper surface 2u of the main beam 2 and the upper surfaces of the other main beam and the other secondary beams are made to be on the same plane. The first brace 4 and the second brace 5 are the same round steel braces, and are composed of metallic fins 4a1, 5b1, round steel 4b1, 5b1 on one side and metallic fins, round steel, etc. on the other side. In the fins 4a1, 5b1, bolt holes 4ah1, 5ah1 are provided at one end side of each (see Fig. 4). One end of the round steel 4b1, 5b1 is fixed to one surface at the other end side of each by welding or the like, and the first bolt 16a and the second bolt 17a are inserted through the bolt holes 4ah1, 5ah1. The same bolt holes are also provided in the fins on the other side, and the other end of the round steel is fixed to one surface of the fin by welding or the like. In this case, the first brace 4 is attached to reinforce the first horizontal structure plane HD1, and the second brace 5 is attached to reinforce the second horizontal structure plane HD2. Note that the first brace and the second brace of the present invention are not limited to round steel braces, and may be general-purpose steel frame braces such as angle steel braces, channel steel braces, CT steel braces, flat steel braces, etc. Also, the fixation of one end of the fin and the round steel is not limited to welding, and an insertion cylinder may be attached to the fin and one end of the round steel may be fitted into the insertion cylinder. Furthermore, one end of the brace may be fixed to another plate-shaped or cylindrical metalware instead of the fin.

[0036] [Brace fixing fitting] As shown in Figs. 5 and 6, the brace fixing fitting 10 is composed of a connection piece 11, a mounting piece 12, a left rising piece 13L, and a right rising piece 13R, and has a long shape in the left-right direction (X direction). The connecting piece 11 has a horizontally long rectangular shape, and a first bolt hole 11h1 and a second bolt hole 11h2 are provided on the left end side (a position slightly to the right from the left end) and the right end side (a position slightly to the left from the right end) of the connecting piece 11, respectively. The first bolt 16a and the second bolt 17a are inserted through the first bolt hole 11h1 and the second bolt hole 11h2. The mounting piece 12 has a shape that is long in the left-right direction (X direction). A left bolt hole 12h1 and a right bolt hole 12h2 are provided on the upper left side and the upper right side of the mounting piece 12, respectively. On the lower side of the left bolt hole 12h1, a left screw hole group 12p composed of six left screw holes 12ph is provided. On the lower side of the right bolt hole 12h2, a right screw hole group 12q composed of six right screw holes 12qh is provided. The left bolt 14a and the right bolt 15a are inserted through the left bolt hole 12h1 and the right bolt hole 12h2, respectively. The left screw 18a and the right screw 19a are inserted through the left screw holes 12ph and the right screw holes 12qh, respectively. For these left screws 18a and right screws 19a, wood screws, coarse-thread screws, screws for hardwood, universal screws, special wood screws, or lag screws, etc. are used. Also, on the end side in the up-down direction (Z direction, the short side direction of the girder 2) of the mounting piece 12 and between the left bolt hole 12h1 and the right bolt hole 12h2, a notch 12k having a rectangular shape (horizontally long rectangular shape) is provided. The width (length) w1 in the left-right direction of the notch 12k is larger than the length w2 in the left-right direction of the cross beam 3 (see Figure 3). The left rising piece 13L has a substantially vertically long rectangular shape and is formed so as to rise from the back-side left end of the connecting piece 11 and the left end of the mounting piece 12. The right rising piece 13R has the same substantially vertically long rectangular shape and is formed so as to rise from the back-side right end of the connecting piece 11 and the right end of the mounting piece 12. In this case, the connecting piece 11, the mounting piece 12, the left rising piece 13L, and the right rising piece 13R are formed by bending a single metal plate, for example, a steel plate. The mounting piece 12 is bent at a right angle (including an error of several degrees) with respect to the connecting piece 11, and the left rising piece 13L and the right rising piece 13R are bent at a right angle (including an error of several degrees) with respect to the connecting piece 11 and the mounting piece 12. The left rising piece 13L and the right rising piece 13R provide strong resistance against a large force that combines bending, tension, shear, torsion, etc. acting on the connecting piece 11 and the mounting piece 12. In addition, in the connecting piece 11, the holes provided at the left and right corners near the mounting piece 12 are the holes used during the manufacturing of the connecting piece 11.

[0037] [Attachment of one end of the first brace 4 and the second brace 5 using the brace fixing fitting 10] Next, the attachment of one end of the first brace 4 and the second brace 5 using the brace fixing fitting 10 will be described. First, apply the back surface of the mounting piece 12 of the brace fixing fitting 10 against the front surface 2F of the girder 2. In this case, at a predetermined position of the girder 2 where the secondary girder 3 is assembled (on the left and right sides of the secondary girder 3, at a certain height (distance h1 from the upper surface 2u of the girder 2) approximately the same as the height of the bottom surface 3b of the secondary girder 3 (distance h2 from the upper surface 2u of the girder 2 to the bottom surface 3b), and at a position where the left - right direction interval is the same as the interval between the left bolt hole 12h1 and the right bolt hole 12h2), there are through - holes in the Y - direction that penetrate the girder 2 from the front surface 2F to the back surface in advance. Position the brace fixing fitting 10 so that the left bolt hole 12h1 and the right bolt hole 12h2 align with these respective through - holes (see Fig. 3). In this state, insert the left bolt 14a and the right bolt 15a into the left bolt hole 12h1, the right bolt hole 12h2, and the respective through - holes of the girder 2, respectively. Screw the nut 14b onto the threaded portion on the tip side of the left bolt 14a, and screw the nut 15b onto the threaded portion on the tip side of the right bolt 15a to fix the mounting piece 12 of the brace fixing fitting 10 to the girder 2. After that, screw the left screws 18a into the girder 2 from each left screw hole 12ph of the left screw hole group 12p of the mounting piece 12, and screw the right screws 19a into the girder 2 from each right screw hole 12qh of the right screw hole group 12q of the mounting piece 12.

[0038] As a result, the mounting piece 12 of the brace fixing fitting 10 is firmly fixed to the front surface 2F of the girder 2 by the left bolts 14a and nuts 14b, the right bolts 15a and nuts 15b, the left screw group 18 (six left screws 18a screwed in from the left screw hole group 12p), and the right screw group 19 (six right screws 19a screwed in from the right screw hole group 12q). At this time, when fixing the mounting piece 12 to the front surface 2F of the girder 2, first, the mounting piece 12 is positioned and fixed to the front surface 2F of the girder 2 with the left bolts 14a and nuts 14b and the right bolts 15a and nuts 15b. Therefore, the left screw 18a and the right screw 19a can be easily screwed into the girder 2 from the left screw hole 12ph and the right screw hole 12qh, improving the workability of positioning the brace fixing fitting 10 and reducing the load on the operator. In particular, the risk of the operator falling during high-altitude work is reduced. In addition, a notch 12k is provided in the mounting piece 12, and the width w1 of the notch 12k in the left-right direction is larger than the length w2 of the crossbeam 3 in the left-right direction. Therefore, even if the length of the crossbeam 3 in the up-down direction (Z direction) is different and the height h2 of the bottom surface 3b of the crossbeam 3 (the distance from the upper surface 2u to the bottom surface 3b) with respect to the upper surface 2u of the girder 2 is different, by changing the distance between the notch 12k and the bottom surface 3b of the crossbeam 3, the mounting piece 12 can be fixed to the front surface 2F of the girder 2 at a constant height h1 (a constant distance from the upper surface 2u) with respect to the upper surface 2u of the girder 2 without interfering with the crossbeam 3 (see FIG. 3).

[0039] After fixing the mounting piece 12 of the brace fixing fitting 10 to the front surface 2F of the girder 2 as described above, one ends of the first brace 4 and the second brace 5 are attached to the connecting piece 11. Specifically, at one end of the first brace 4, with the surface where the round steel 4b1 of the vane plate 4a1 is fixed facing downward, the lower surface of the vane plate 4a is applied to the upper surface of the connecting piece 11 so that the bolt hole 4ah1 of the vane plate 4a1 aligns with the first bolt hole 11h1 of the connecting piece 11. The first bolt 16a is inserted through the bolt hole 4ah1 and the first bolt hole 11h1, and a nut 16b is screwed onto the threaded portion on the tip side of the first bolt 16a to fix the vane plate 4a1 to the connecting piece 11. Also, with the surface to which the round steel 5b1 is fixed facing upward at one end of the second brace 5, the lower surface of the vane plate 5a1 is applied to the upper surface of the connecting piece 11 so that the bolt hole 5ah1 of the vane plate 5a1 aligns with the second bolt hole 11h2 of the connecting piece 11. The second bolt 17a is inserted through the bolt hole 5ah1 and the second bolt hole 11h2, and a nut 17b is screwed onto the threaded portion on the tip side of the second bolt 17a to fix the vane plate 5a1 to the connecting piece 11. The vane plates 4a1 and 5a1 can be fixed to the connecting piece 11 with the surface to which the round steel 4b1 and round steel 5b1 are fixed facing upward or downward. In the first brace 4, the round steel 4b1 is positioned on the lower surface side of the vane plate 4a1, and in the second brace 5, the round steel 5b1 is positioned on the upper surface side of the vane plate 5a1 to prevent interference with other braces where the first brace 4 and the second brace 5 intersect (details will be described later). In this case, since one end of the first brace 4 is such that the vane plate 4a1 is attached to the connecting piece 11 by the first bolt 16a and the nut 16b, the one end of the first brace 4 can be fixed to the connecting piece 11 at an arbitrary angle in the horizontal plane (XY plane). Similarly, since one end of the second brace 5 is such that the vane plate 5a1 is attached to the connecting piece 11 by the second bolt 17a and the nut 17b, the one end of the second brace 5 can be fixed to the connecting piece 11 at an arbitrary angle in the horizontal plane (XY plane).

[0040] [Horizontal planes of two surfaces reinforced with braces such as the first brace 4 and the second brace 5] FIG. 7 is a plan view of the horizontal planes of two surfaces reinforced with braces such as the first brace 4 and the second brace 5. In the figure, 2' is the main beam, 3', 3'' are the secondary beams, 6 is the first brace, 7 is the second brace, 6a1, 6a2, 7a1, 7a2 are the vane plates, 6b1, 6b2, 7b1, 7b2 are the round steels, 4tb, 5tb, 6tb, 7tb are the turnbuckles, and 20, 30, 40, 50, 60 are the same brace fixing brackets as the brace fixing bracket 10. In the horizontal plane shown in Fig. 7, the main girders 2 and 2' are installed opposite to each other such that their axes (longitudinal axes) face the left - right direction (X - direction), and between the main girders 2 and 2', the secondary girders 3', 3, 3'' are installed at equal intervals from left to right. In this case, the upper surfaces of the main girders 2, 2', and the secondary girders 3, 3', 3'' are made to be on the same plane. Among these main girders and secondary girders, the main girders 2, 2' and the secondary girders 3', 3 form the first horizontal plane HD1, and the main girders 2, 2' and the secondary girders 3, 3'' form the second horizontal plane HD2. On the front of the main girder 2, a brace fixing fitting 10 is attached so as to straddle the secondary girder 3 below the secondary girder 3, a brace fixing fitting 40 is attached so as to straddle the secondary girder 3' below the secondary girder 3', and a brace fixing fitting 50 is attached so as to straddle the secondary girder 3'' below the secondary girder 3''. Also, on the back of the main girder 2', a brace fixing fitting 60 is attached so as to straddle the secondary girder 3 below the secondary girder 3, a brace fixing fitting 20 is attached so as to straddle the secondary girder 3' below the secondary girder 3', and a brace fixing fitting 30 is attached so as to straddle the secondary girder 3'' below the secondary girder 3''.

[0041] In the first horizontal plane HD1, one end vane 4a1 of the first brace 4 is attached to the left side of the connecting piece 11 of the brace fixing fitting 10 with the round steel 4b1 facing downward, the other end vane 4a2 of the first brace 4 is attached to the right side of the connecting piece 21 of the brace fixing fitting 20 with the round steel 4b2 facing downward, and the first brace 4 composed of the round steels 4b1, 4b2 connected by the vanes 4a1, 4a2 and the turnbuckle 4tb is connected to the connecting piece 11 of the brace fixing fitting 10 and the connecting piece 21 of the brace fixing fitting 20. Also, on the left side of the connecting piece 61 of the brace fixing fitting 60, the vane 6a1 at one end of the first brace 6 is attached with the round steel 6b1 on the upper side. On the right side of the connecting piece 41 of the brace fixing fitting 40, the vane 6a2 at the other end of the first brace 6 is attached with the round steel 6b2 on the upper side. The first brace 6 composed of the vanes 6a1, 6a2 and the round steels 6b1, 6b2 connected by the turnbuckle 6tb is connected to the connecting piece 41 of the brace fixing fitting 40 and the connecting piece 61 of the brace fixing fitting 60. In this case, the turnbuckle 4tb is located at a position closer to the brace fixing fitting 10 side from the center of the first horizontal plane HD1, and the turnbuckle 6tb is located at a position closer to the brace fixing fitting 40 side from the center of the first horizontal plane HD1, so that the turnbuckle 4tb and the turnbuckle 6tb do not intersect. In the second horizontal plane HD2, on the right side of the connecting piece 11 of the brace fixing fitting 10, the vane 5a1 at one end of the second brace 5 is attached with the round steel 5b1 on the upper side. On the left side of the connecting piece 31 of the brace fixing fitting 30, the vane 5a2 at the other end of the second brace 5 is attached with the round steel 5b2 on the upper side. The second brace 5 composed of the vanes 5a1, 5a2 and the round steels 5b1, 5b2 connected by the turnbuckle 5tb is connected to the connecting piece 11 of the brace fixing fitting 10 and the connecting piece 31 of the brace fixing fitting 30. Also, on the right side of the connecting piece 61 of the brace fixing fitting 60, the vane 7a1 at one end of the second brace 7 is attached with the round steel 7b1 on the lower side. On the left side of the connecting piece 51 of the brace fixing fitting 50, the vane 7a2 at the other end of the second brace 7 is attached with the round steel 7b2 on the lower side. The second brace 7 composed of the vanes 7a1, 7a2 and the round steels 7b1, 7b2 connected by the turnbuckle 7tb is connected to the connecting piece 51 of the brace fixing fitting 50 and the connecting piece 61 of the brace fixing fitting 60. Also in this case, the turnbuckle 5tb is located at a position closer to the brace fixing fitting 10 side from the center of the second horizontal plane HD2, and the turnbuckle 7tb is located at a position closer to the brace fixing fitting 50 side from the center of the second horizontal plane HD2, so that the turnbuckle 5tb and the turnbuckle 7tb do not intersect. As a result, the first horizontal plane HD1 is reinforced by the two first braces 4 and 6 spanned between the main girders 2 and 2' via the four brace fixing brackets 10, 20, 40, and 60, and the second horizontal plane HD2 is reinforced by the two second braces 5 and 7 spanned between the main girders 2 and 2' via the four brace fixing brackets 10, 30, 50, and 60. Normally, four brace fixing brackets are required for one plane, and eight brace fixing brackets are required for two consecutive planes. In contrast, in the horizontal plane shown in FIG. 7, two consecutive planes (the first horizontal plane HD1 and the second horizontal plane HD2) can be reinforced with six brace fixing brackets 10, 20, 30, 40, 50, and 60, reducing the number of brace fixing brackets. Moreover, in the brace mounting structure 1, one or two braces can be connected with one type of brace fixing bracket, reducing the types of brace fixing brackets.

[0042] FIGS. 8(a) and 8(b) are respectively the enlarged cross-sectional views taken along line A-A and line B-B of FIG. 7. In the figures, 2u' is the upper surface of the main girder 2', 3b' is the bottom surface of the secondary girder 3', 3b'' is the bottom surface of the secondary girder 3'', 21, 31, 41, and 51 are the same connection pieces as the connection piece 11, 22, 32, 42, and 52 are the same mounting pieces as the mounting piece 12, and 22k, 32k, 42k, and 52k are the same notches as the notch 12k. As shown in FIG. 8, the heights (lengths in the Z direction) of the secondary girders 3, 3', and 3'' are different from each other, and the Z-direction positions of the upper surfaces of the secondary girders 3, 3', and 3'' and the main girders 2 and 2' are the same. The heights of the bottom surfaces of the secondary girders (the distances from the upper surfaces 2u and 2u' to the bottom surfaces of the secondary girders) are different. Now, let the height of the bottom surface 3b of the secondary girder 3 (the distance from the upper surfaces 2u and 2u' to the bottom surface 3b) be h2, the height of the bottom surface 3b' of the secondary girder 3' (the distance from the upper surfaces 2u and 2u' to the bottom surface 3b') be h2', and the height of the bottom surface 3b'' of the secondary girder 3'' (the distance from the upper surfaces 2u and 2u' to the bottom surface 3b'') be h2'', and assume h2 > h2' > h2''. In this case, since the same notches 12k, 42k, 52k are provided in the mounting pieces 12, 42, 52 of the brace fixing fittings 10, 40, 50, by varying the distances from the bottom surfaces 3b, 3b', 3b'' of the respective joists to the lower sides of the notches 12k, 42k, 52k, as shown in Fig. 8(a), the heights (the heights of the centers of the left bolt holes and the right bolt holes) of the respective brace fixing fittings 10, 40, 50 with respect to the upper surface 2u of the girder 2 are all made the same h1, the centers of the round steel 4b1 of the first brace 4 and the round steel 7b2 of the second brace 7 are made the same height h3, and the centers of the round steel 5b1 of the second brace 5 and the round steel 6b2 of the second brace 6 are made the same height h3'. Similarly, as shown in Fig. 8(b), the heights of the respective brace fixing fittings 20, 30, 60 attached to the back surface of the girder 2' with respect to the upper surface 2u' of the girder 2' are also made the same h1, the centers of the round steel 4b2 of the first brace 4 and the round steel 7b1 of the second brace 7 are made the same height h3, and the centers of the round steel 5b2 of the second brace 5 and the round steel 6b1 of the second brace 6 are made the same height h3'. Since the upper surface 2u of the girder 2 and the upper surface 2u' of the girder 2' are at the same height, the heights of the first brace 4 and the second brace 7 with respect to the upper surface 2u (2u') are the same h3, the heights of the second brace 5 and the first brace 6 are the same h3', and the height h3 is larger than the height h3' by the sum of the diameters of the respective round steels and the thicknesses of the respective fin plates. And in the first horizontal plane HD1, since there is a gap equal to the thickness of the fin plate 4a1 between the round steel 4b2 of the intersecting first brace 4 and the round steel 6b1 of the first brace 6, the round steel 4b2 and the round steel 6b1 do not interfere (contact) with each other, there is no wear of the round steel 4b2 and the round steel 6b1 due to interference (contact), and the load-bearing capacity of the first braces 4, 6 is prevented from decreasing. Similarly, in the second horizontal plane HD1, since there is a gap equal to the thickness of the fin plate 5a1 or the like between the round steel 5b2 of the intersecting second brace 5 and the round steel 7b1 of the second brace 7, the round steel 5b2 and the round steel 7b1 do not interfere (contact) with each other, there is no wear of the round steel 5b2 and the round steel 7b1 due to interference (contact), and the load-bearing capacity of the second braces 5, 7 is prevented from decreasing. Particularly, when the diameters of the round steel bars of the first braces 4, 6 and the second braces 5, 7 are not very large (for example, the diameter of the round steel bar is 6 to 16 mm), the reduction in the bearing capacity of the braces due to the wear of the round steel bars becomes significant. Therefore, the effect of preventing the reduction in the bearing capacity of the braces by avoiding the interference of the intersecting braces as described above becomes significant. In the horizontal plane shown in Fig. 7, the round steel bars of the first braces 4 and the second braces 7 are positioned on the lower surface of the fin plate, and the round steel bars of the second braces 5 and the first braces 6 are positioned on the upper surface of the fin plate so that the intersecting round steel bars do not interfere. However, the round steel bars of all the braces of the first braces 4, 6, the second braces 5, 7 may be positioned on the lower surface of the fin plate, or the round steel bars of all the braces may be positioned on the upper surface of the fin plate. In this case, the round steel bars of the intersecting braces interfere (contact) with each other and wear occurs. However, by increasing the diameter of the round steel bars (for example, making the diameter of the round steel bar 18 mm or more), it is possible to prevent the bearing capacity from decreasing significantly even if the round steel bars are slightly worn at the contact part.

[0043] [Horizontal plane of four surfaces reinforced with braces such as the first brace 4 and the second brace 5] FIG. 9 is a plan view of a four-plane horizontal plane reinforced with braces such as the first brace 4 and the second brace 5. FIGS. 10(a) and 10(b) are enlarged cross-sectional views taken along line C-C and line D-D of FIG. 9, respectively. In the figures, 2A, 2B, 2C, 3A, 3B1, 3B2, 3C are beams, 2Af is the front of beam 2A, 2Au is the upper surface of beam 2A, 2Bf is the front of beam 2B, 2Br is the rear of beam 2B, 2Bu is the upper surface of beam 2B, 2Cr is the rear of beam 2C, 2Cu is the upper surface of beam 2C, 3B1b is the bottom surface of beam 3B1, 3B2b is the bottom surface of beam 3B2, 4’, 6’ are the first braces, 5’, 7’ are the second braces, 6a1’, 6a2’, 7a1’, 7a2’ are fin plates, 6b1’, 6b2’, 7b1’, 7b2’ are round steels, 4tb’, 5tb’, 6tb’, 7tb’ are turnbuckles, 10’, 20’, 30’, 40’, 50’, 60’ are brace fixing brackets, HD11 is the first horizontal plane, HD12 is the second horizontal plane, HD13 is the third horizontal plane, HD14 is the fourth horizontal plane, HF is the horizontal force, P1, P2, P3, P4 are tensile forces. In the figure, the horizontal force and the tensile force are represented by thick dashed arrows. The same reference numerals are given to the same components as those shown in FIGS. 7 and 8. In the horizontal plane shown in FIG. 9, beams 2A and 2C are installed at the same height position (the position at the same height from the reference horizontal plane such as the foundation surface) on the upper surface of the column (not shown) with a space therebetween so that their axes (longitudinal axes) face the left-right direction (X direction). Beam 3A is assembled at a right angle or nearly at a right angle to the left end side of the front 2Af of beam 2A and the rear 2Cr of beam 2C so that its axis faces the front-rear direction (Y direction). Beam 3C is assembled at a right angle or nearly at a right angle to the right end side of the front 2Af of beam 2A and the rear 2Cr of beam 2C so that its axis faces the front-rear direction (Y direction). Beam 2B is assembled at a right angle or nearly at a right angle to the center in the front-rear direction of the right side surface of beam 3A and the left side surface of beam 3C so that its axis faces the left-right direction. Beam 3B1 is assembled at a right angle or nearly at a right angle to the center in the left-right direction of the front 2Af of beam 2A and the rear 2Br of beam 2B so that its axis faces the front-rear direction. Beam 3B2 is assembled at a right angle or nearly at a right angle to the center in the left-right direction of the rear 2Cr of beam 2C and the front 2Bf of beam 2B so that its axis faces the front-rear direction. In this case, the upper surfaces of the respective beams 2A, 2B, 2C, 3A, 3B1, 3B2, and 3C are made to be the same plane. For the above-mentioned beams 2A, 2B, 2C, 3A, 3B1, 3B2, and 3C, wooden materials such as hinoki (Japanese cypress), hiba (thujopsis dolabrata), sugi (Japanese cedar), etc. are used, but materials other than wood, such as metals like carbon steel and aluminum, may also be used. Then, the left half of beam 2A, the left half of beam 2B, the upper half of beam 3A, and beam 3B1 form the first horizontal structure plane HD11, the right half of beam 2A, the right half of beam 2B, beam 3B1, and the upper half of beam 3C form the second horizontal structure plane HD12, the left half of beam 2B, the left half of beam 2C, the lower half of beam 3A, and beam 3B2 form the third horizontal structure plane HD13, and the right half of beam 2B, the right half of beam 2C, beam 3B2, and the lower half of beam 3C form the fourth horizontal structure plane HD14.

[0044] [First horizontal structure plane HD11, second horizontal structure plane HD12] At the center of the front surface 2Af of the rear beam 2A, a brace fixing fitting 10 is attached so as to straddle beam 3B1 below beam 3B1. To the right adjacent to beam 3A on the front surface 2Af, a brace fixing fitting 40 is attached, and to the left adjacent to beam 3C on the front surface 2Af, a brace fixing fitting 50 is attached. In this case, the height (the distance from the upper surface 2Au to the bolt) with respect to the upper surface 2Au (the upper end of the front surface 2Af) of the bolts for fixing the brace fixing fittings 10, 40, and 50 to the front surface 2Af is all the same h1, and the three brace fixing fittings 10, 40, and 50 are attached at the same height position with respect to the upper surface 2Au (the upper end of the front surface 2Af). At the center of the rear surface 2Br of the central beam 2B, a brace fixing fitting 60 is attached so as to straddle beam 3B1 below beam 3B1. To the right adjacent to beam 3A on the rear surface 2Br, a brace fixing fitting 20 is attached, and to the left adjacent to beam 3C on the rear surface 2Br, a brace fixing fitting 30 is attached. In this case, too, the heights of the bolts that secure the brace fixing brackets 20, 30, and 60 to the rear surface 2Br (from the lower end of the rear surface 2Br) are all the same h1, and the three brace fixing brackets 20, 30, and 60 are attached at the same height relative to the upper surface 2Bu (upper end of the rear surface 2Br). The height (length in the Z direction) of the beam 3B1 is h2'', which is the same as the height of the small beam 3'' shown in Figs. 7 and 8, and the height h2'' is smaller than the height h1. The attachment of the first brace 4 to the brace fixing brackets 10 and 20, the attachment of the first brace 6 to the brace fixing brackets 40 and 60, the attachment of the second brace 5 to the brace fixing brackets 10 and 30, and the attachment of the second brace 7 to the brace fixing brackets 50 and 60 are the same as those of the horizontal structural members (first horizontal structural member HD1, second horizontal structural member HD2) shown in Figure 7.

[0045] [3rd horizontal plane HD13, 4th horizontal plane HD14] The configurations of the third horizontal structural face HD13 and the fourth horizontal structural face HD14 are the same as the configurations of the first horizontal structural face HD11 and the second horizontal structural face HD12. Specifically, a brace fixing bracket 10' is attached to the center of the back surface 2Cr of the front beam 2C, below the beam 3B2, straddling the beam 3B2, a brace fixing bracket 40' is attached to the right of the beam 3A on the back surface 2Cr, and a brace fixing bracket 50' is attached to the left of the beam 3C on the back surface 2Cr (see Figure 9). In this case, the height (distance from the upper surface 2Cu to the bolt) of the bolt that fixes the brace fixing brackets 10', 40', 50' to the rear surface 2Cr is the same h1, and the three brace fixing brackets 10', 40', 50' are attached at the same height based on the upper surface 2Cu (upper end of the rear surface 2Cr). A brace fixing bracket 60' is attached to the center of the front face 2Bf of the central beam 2B, below the beam 3B2, straddling the beam 3B2, a brace fixing bracket 20' is attached to the right of the beam 3A on the front face 2Bf, and a brace fixing bracket 30' is attached to the left of the beam 3C on the front face 2Bf. In this case too, the heights of the bolts that secure the brace fixing brackets 20', 30', and 60' to the front face 2Bf from the top surface 2Bu (the top end of the front face 2Bf) are all the same h1, and the three brace fixing brackets 20', 30', and 60' are attached at the same height relative to the top surface 2Bu (the top end of the front face 2Bf). Furthermore, the height (length in the Z direction) of the beam 3B2 is h2, the same as the height of the sub-beam 3 shown in Figures 7 and 8, and height h2 is greater than height h1. However, the mounting pieces 12', 62' of the brace fixing brackets 10', 60' have a notch that is the same as the notch 12k of the mounting piece 12 of the brace fixing bracket 10, and by fitting the bottom surface 3B2b of the beam 3B2 into the recess of this notch, the brace fixing brackets 10', 60' can be attached at the same height as the brace fixing brackets 10, 60.

[0046] In the third horizontal structural face HD13, the battledore 4a1' of the brace 4' is attached to the left side of the connecting piece 11' of the brace fixing bracket 10' with the round steel 4b1' on the bottom, and the battledore 4a2' of the brace 4' is attached to the right side of the connecting piece 21' of the brace fixing bracket 20' with the round steel 4b2' on the bottom, and the brace 4' consisting of the battledores 4a1', 4a2', the round steel 4b1', 4b2', the turnbuckle 4tb', etc. is connected to the connecting piece 11' of the brace fixing bracket 10' and the connecting piece 21' of the brace fixing bracket 20'. Furthermore, the battledore 6a2' of the brace 6' is attached to the right side of the connecting piece 41' of the brace fixing bracket 40' with the round steel 6b2' on the upper side, and the battledore 6a1' of the brace 6' is attached to the left side of the connecting piece 61' of the brace fixing bracket 60' with the round steel 6b1' on the upper side, and the brace 6' consisting of the battledores 6a1', 6a2', the round steel 6b1', 6b2', the turnbuckle 6tb', etc. is connected to the connecting piece 41' of the brace fixing bracket 40' and the connecting piece 61' of the brace fixing bracket 60'. In this case, turnbuckle 4tb' is located closer to the brace fixing bracket 10' side from the center of the third horizontal structural face HD3, and turnbuckle 6tb' is located closer to the brace fixing bracket 40' side from the center of the third horizontal structural face HD3, so that turnbuckle 4tb' and turnbuckle 6tb' do not intersect. In the fourth horizontal structural face HD14, the battledore 5a1' of the brace 5' is attached to the right side of the connecting piece 11' of the brace fixing bracket 10' with the round steel 5b1' on the upper side, and the battledore 5a2' of the brace 5' is attached to the lower left corner of the connecting piece 31' of the brace fixing bracket 30' with the round steel 5b2' on the upper side, and the brace 5' consisting of the battledores 5a1', 5a2', the round steel 5b1', 5b2', the turnbuckle 5tb', etc. is connected to the connecting piece 11' of the brace fixing bracket 10' and the connecting piece 31' of the brace fixing bracket 30'. Furthermore, the battledore 7a2' of the brace 7' is attached to the left side of the connecting piece 51' of the brace fixing bracket 50' with the round steel 7b2' on the bottom, and the battledore 7a1' of the brace 7' is attached to the right side of the connecting piece 61' of the brace fixing bracket 60' with the round steel 7b1' on the bottom, and the brace 7' consisting of the battledores 7a1', 7a2', the round steel 7b1', 7b2', the turnbuckle 7tb', etc. is connected to the connecting piece 51' of the brace fixing bracket 50' and the connecting piece 61' of the brace fixing bracket 60'. In this case too, turnbuckle 5tb' is located closer to the brace fixing bracket 10' side from the center of the fourth horizontal structural face HD4, and turnbuckle 7tb' is located closer to the brace fixing bracket 50' side from the center of the fourth horizontal structural face HD4, so that turnbuckle 5tb' and turnbuckle 7tb' do not intersect. As a result, the third horizontal structural panel HD3 is reinforced by two braces 4' and 6' that are hung between beams 2C and 2B via four brace fixing brackets 10', 20', 40', and 60', and the fourth horizontal structural panel HD4 is reinforced by two braces 5' and 7' that are hung between beams 2C and 2B via four brace fixing brackets 10', 30', 50', and 60'. In this case, a brace 4' reinforcing the third horizontal structural panel HD3 and a brace 5' reinforcing the fourth horizontal structural panel HD4 are connected to a brace fixing bracket 10' attached below beam 3B2 on the back surface 2Cr of beam 2C, and a brace 6' reinforcing the third horizontal structural panel HD3 and a brace 7' reinforcing the fourth horizontal structural panel HD4 are connected to a brace fixing bracket 60' attached below beam 3B2 on the front surface 2Bf of beam 2B.

[0047] [Action when horizontal force acts on the horizontal plane of the four structural walls] In the four-panel horizontal structural member shown in Figure 9, when a horizontal force HF acts to move beam 2A to the left (-X direction) relative to beam 2C along the axis of beam 2A, each rectangular horizontal structural member will attempt to deform into a parallelogram in which the distance between the upper left corner and the lower right corner increases and the distance between the upper right corner and the lower left corner decreases. In this case, braces 5, 6, 4', 7', which are placed across the upper left and lower right corners of each horizontal structural member, resist the above-mentioned deformation, and tensile forces act on braces 5, 6, 4', 7', which in turn act on the faces of the beams to which braces 5, 6, 4', 7' are fixed. Now, let P1 be the tensile force acting on brace 6 of the first horizontal structural face HD1, P2 be the tensile force acting on brace 5 of the second horizontal structural face HD2, P3 be the tensile force acting on brace 4' of the third horizontal structural face HD3, and P4 be the tensile force acting on brace 7' of the fourth horizontal structural face HD4. In the first horizontal structural face HD1, a tensile force P1 acts on the front surface 2Af of the beam 2A and the back surface 2Br of the beam 2B to which the brace fixing metal fittings 40, 60 connected to the brace 6 are attached, at the fixing portions of each brace fixing metal fitting. In the second horizontal structural face HD2, a tensile force P2 acts on the front surface 2Af of the beam 2A and the back surface 2Br of the beam 2B to which the brace fixing metal fittings 10, 30 connected to the brace 5 are attached, at the fixing portions of each brace fixing metal fitting. In the third horizontal structural face HD3, a tensile force P3 acts on the fixed portion of each brace fixing bracket on the front surface 2Bf of the beam 2B and the back surface 2Cr of the beam 2C to which the brace fixing brackets 20', 10' connected to the brace 4' are attached. In the fourth horizontal structural face HD4, a tensile force P4 acts on the fixed portions of each brace fixing bracket on the front surface 2Bf of the beam 2B and the back surface 2Cr of the beam 2C to which the brace fixing brackets 60', 50' connected to the brace 7' are attached.

[0048] As described above, the brace fixing brackets 10 fixed to the front surface 2Af of the beam 2A and the brace fixing brackets 60 fixed to the rear surface 2Br of the beam 2B are fixed below the beam 3B1, and the brace fixing brackets 10' fixed to the rear surface 2Cr of the beam 2C and the brace fixing brackets 60' fixed to the front surface 2Bf of the beam 2B are fixed below the beam 3B2. In this case, the heights (the heights of the centers of the left bolt holes and the right bolt holes) based on the upper surfaces 2Au and 2Bu of the brace fixing brackets 10 and 60 are the same h1, the height h2" of the beam 3B1 is smaller than h1, and the bottom surface 3B1b of the beam 3B1 is located above the upper ends of the attachment pieces 12 and 62 of the brace fixing brackets 10 and 60 (see Fig. 10). On the other hand, the height h2 of the beam 3B2 is larger than the height h2" of the beam 3B1 and larger than h1. However, by allowing the beam 3B2b to sink into the recesses formed by the notches provided in the attachment pieces 12' and 62' of the brace fixing brackets 10' and 60', the heights of the brace fixing brackets 10' and 60' can be made the same h1 as that of the brace fixing brackets 10 and 60 (see Fig. 3). From this, the positions of the fixing portions of the brace fixing brackets on which the respective tensile forces P1, P2, P3, and P4 act become the same height h4. On the central beam 2B, the tensile force P1 acts on the rear surface 2Br and the tensile force P4 acts on the front surface 2Bf. However, depending on the tensile forces P1 and P4, no moment is generated to rotate the beam 2B, and the beam 2B does not deform due to the moment. Note that the magnitudes and directions of the tensile force P1 and the tensile force P4 may not be exactly the same and may be slightly different. In that case, the tensile force P1 and the tensile force P4 do not act so as to completely cancel each other out, and a moment is generated to rotate the beam 2B. However, such a moment is small and does not substantially deform the beam 2B.

[0049] Here, when no notches 12k etc. are provided in the attachment pieces 12 etc. of the brace fixing brackets 10 etc., the brace fixing brackets attached below the beam cannot allow the bottom surface of the beam to sink into the recess formed by the notch of the attachment piece, and are attached such that the upper end of the attachment piece is located below the bottom surface of the beam. Figs. 11(a) and (b) are enlarged cross-sectional views taken along line C-C and D-D, respectively, when the brace fixing brackets 10’ and 60’ are attached to the upper ends of the attachment pieces 12’ and 62’ such that they are positioned below the bottom surface beam 3B2b of the beam 3B2 in Fig. 10. In the figures, MO is the moment. Even if the brace fixing brackets 10 and 60 are attached at the position of height h1, since the height h2” of the beam 3B1 is smaller than h1 and the bottom surface 3B1b of the beam 3B1 is positioned above the upper ends of the attachment pieces 12 and 62 of the brace fixing brackets 10 and 60, the brace fixing brackets 10 and 60 can be attached at the position of height h1. From this, as described above, the tensile force P1 of the fixing portion of the brace fixing brackets 10 and 60 acts at the position of the height h4 of the back surface 2Br of the beam 3B2. On the other hand, since the height h2 of the beam 3B2 is larger than h1, in order for the upper ends of the attachment pieces 12’ and 62’ of the brace fixing brackets 10’ and 60’ to be positioned below the bottom surface 3B2b of the beam 3B2, it is necessary to attach the brace fixing brackets 10’ and 60’ at a position of height h1’ that is larger than the height h1. When the brace fixing brackets 10’ and 60’ are attached at the position of height h1’ in this way, the tensile force P4 of the fixing portion of the brace fixing brackets 10’ and 60’ acts at the position of the height h4’ of the front surface 2Bf of the beam 3B2, and the height h4’ is larger than the height h4. Therefore, in the beam 2B, the vertical positions of the tensile force P1 acting on the back surface 2Br and the tensile force P4 acting on the front surface 2Bf are different, and a moment MO that attempts to rotate the beam 2B is generated by the tensile force P1 and the tensile force P4. The beam 2B is deformed by the moment MO, and the bearing capacities of the respective horizontal structural surfaces HD11, HD12, HD13, and HD14 are reduced. In this case, the brace fixing brackets 10 and 60 can also be attached at the position of height h1’. However, when the brace fixing brackets are attached at the position of height h1’, the position of the fixing portion (bolt, screw) of the brace fixing bracket approaches the bottom surface of the beam, and there arises a problem that the beam is likely to crack at the fixing portion (bolt, screw). Therefore, by providing notches in the attachment pieces 12' and 62' of the brace fixing brackets 10' and 60', the brace fixing brackets 10' and 60' can be attached at the same height h1 as the brace fixing brackets 10 and 60. Even if a horizontal force HF acts on the brace attachment structure 1, no moment MO is generated in the beam 2B. Even if the magnitude and direction of the tensile force P1 and the magnitude and direction of the tensile force P4 are somewhat different, no moment that substantially deforms the beam 2B acts, and the bearing capacity of each horizontal plane can be maintained.

[0050] [Vertical plane reinforced by the first braces 4, 6, the second braces 5, 7] FIG. 12 is a front view of the vertical plane reinforced by the first braces 4, 6, the second braces 5, 7. In the figure, 70 is a cross member, 71 and 72 are columns, 73 is a beam, 74 is an intermediate beam, VD1 is the first vertical plane, and VD2 is the second vertical plane. The same reference numerals are given to those identical to those shown in FIG. 7. In the vertical plane shown in FIG. 12, the column 71 is assembled on the left side of the upper surface of the cross member 70 installed opposite so that its axis (longitudinal axis) faces the left - right direction (X - direction), the column 3 is assembled on the right side of the upper surface of the cross member 70, the beam 73 is assembled on the upper surfaces of the columns 71 and 72, and the intermediate beam 74 is assembled on the opposing side surfaces of the columns 71 and 72. The cross member 70 is a base or a beam, and the same wooden materials as those of the large beam 2 and the like, for example, woods such as cypress, hinoki leaf cypress, and cedar are used. The columns 71, 72, the beam 73, and the intermediate beam 74 also use the same wooden materials, but materials other than wood, for example, metals such as carbon steel and aluminum may be used. Among these cross members, columns, beams, etc., the first vertical plane VD1 is formed by the cross member 70, the columns 71, 72, and the intermediate beam 74, and the second vertical plane VD2 is formed by the columns 71, 72, the beam 73, and the intermediate beam 74. And the same braces as those attached to the first horizontal plane HD1 and the second horizontal plane HD2 shown in FIG. 7 are attached to the first vertical plane VD1 and the second vertical plane VD2 via the same brace fixing brackets. Specifically, on the right side of the left-side column 71, a brace fixing bracket 10 is attached to the back side of the intermediate beam 74 in the vertical center, spanning the intermediate beam 74, a brace fixing bracket 40 is attached near the lower cross member 70, and a brace fixing bracket 50 is attached near the upper beam 73. In addition, on the left side of the right-side column 72, a brace fixing bracket 60 is attached to the back side of the intermediate beam 74 in the vertical center, spanning the intermediate beam 74, a brace fixing bracket 20 is attached near the lower cross member 70, and a brace fixing bracket 30 is attached near the upper beam 73.

[0051] In the first vertical structural plane VD1, the battledore 4a1 at one end of the first brace 4 is attached to the underside of the connecting piece 11 of the brace fixing bracket 10 with the round steel 4b1 facing back, and the battledore 4a2 at the other end of the first brace 4 is attached to the upper side of the connecting piece 21 of the brace fixing bracket 20 with the round steel 4b2 facing back, and the first brace 4 consisting of the battledores 4a1, 4a2 and the round steel 4b1, 4b2 connected by the turnbuckle 4tb is connected to the connecting piece 11 of the brace fixing bracket 10 and the connecting piece 21 of the brace fixing bracket 20. Furthermore, the shuttlecock 6a1 at one end of the first brace 6 is attached to the underside of the connecting piece 61 of the brace fixing bracket 60 with the round steel 6b1 facing forward, and the shuttlecock 6a2 at the other end of the first brace 6 is attached to the upper side of the connecting piece 41 of the brace fixing bracket 40 with the round steel 6b2 facing forward, and the first brace 6 consisting of the shuttlecocks 6a1, 6a2 and the round steel 6b1, 6b2 connected by the turnbuckle 6tb is connected to the connecting piece 41 of the brace fixing bracket 40 and the connecting piece 61 of the brace fixing bracket 60. In this case, turnbuckle 4tb is located closer to the brace fixing bracket 10 from the center of the first vertical structural plane VD1, and turnbuckle 6tb is located closer to the brace fixing bracket 40 from the center of the first vertical structural plane VD1, so that turnbuckle 4tb and turnbuckle 6tb do not intersect. In the second vertical structural plane HD2, the battledore 5a1 at one end of the second brace 5 is attached to the upper side of the connecting piece 11 of the brace fixing bracket 10 with the round steel 5b1 facing forward, and the battledore 5a2 at the other end of the second brace 5 is attached to the lower side of the connecting piece 31 of the brace fixing bracket 30 with the round steel 5b2 facing forward, and the second brace 5 consisting of the battledores 5a1, 5a2 and the round steel 5b1, 5b2 connected by the turnbuckle 5tb is connected to the connecting piece 11 of the brace fixing bracket 10 and the connecting piece 31 of the brace fixing bracket 30. Furthermore, the shuttlecock 7a1 at one end of the second brace 7 is attached to the upper side of the connecting piece 61 of the brace fixing bracket 60 with the round steel 7b1 facing back, and the shuttlecock 7a2 at the other end of the second brace 7 is attached to the lower side of the connecting piece 51 of the brace fixing bracket 50 with the round steel 7b2 facing back, and the second brace 7 consisting of the shuttlecocks 7a1, 7a2 and the round steel 7b1, 7b2 connected by the turnbuckle 7tb is connected to the connecting piece 51 of the brace fixing bracket 50 and the connecting piece 61 of the brace fixing bracket 60. In this case too, turnbuckle 5tb is located closer to the brace fixing bracket 10 from the center of the second vertical structural plane VD2, and turnbuckle 7tb is located closer to the brace fixing bracket 50 from the center of the second vertical structural plane VD2, so that turnbuckle 5tb and turnbuckle 7tb do not intersect. As a result, the first vertical structural plane VD1 is reinforced by two first braces 4 and 6 hung between columns 71 and 72 via four brace fixing brackets 10, 20, 40, and 60, and the second vertical structural plane VD2 is reinforced by two second braces 5 and 7 hung between columns 71 and 72 via four brace fixing brackets 10, 30, 50, and 60. As with the first horizontal structural face HD1 and second horizontal structural face HD2 shown in Figure 7, the first vertical structural face VD1 and second vertical structural face VD2 of two consecutive structural faces can be reinforced with six brace fixing brackets 10, 20, 30, 40, 50, 60, reducing the number of brace fixing brackets.Moreover, one type of brace fixing bracket can be used to connect one or two braces, reducing the number of types of brace fixing brackets.

[0052] [Brace mounting structure using other examples of brace fixing hardware] FIG. 13 is a perspective view showing the configuration of a brace attachment structure using another example of a brace fixing fitting, FIG. 14 is a plan view of the brace attachment structure shown in FIG. 13, FIG. 15 is a front view of the brace attachment structure shown in FIG. 13, FIG. 16 is a perspective view of the brace fixing fitting shown in FIG. 13, and FIGS. 17(a), (b), (c), and (d) are respectively a plan view, a front view, a right side view, and an E-E cross-sectional view of the brace fixing fitting shown in FIG. 13. In the figures, 1' is the brace attachment structure, 8 is the first brace, 9 is the second brace, 8a1 and 9a1 are vanes, 8b1 and 9b1 are round steel bars, 80 is the brace fixing fitting, 81 is the connecting piece, 81h1 is the first bolt hole, 81h2 is the second bolt hole, 82 is the mounting piece, 82p is the left screw hole group, 82ph is the left screw hole, 82q is the right screw hole group, 82qh is the right screw hole, 83L is the left rising piece, 83R is the right rising piece, 84d1, 84d2, and 84d3 are recesses, 86a is the first bolt, 87a is the second bolt, 86b and 87b are nuts, 88 is the left screw group, 88a is the left screw, 89 is the right screw group, and 89a is the right screw. The same reference numerals are given to the same components as those shown in FIGS. 1 to 3, and in FIGS. 13 to 15, the purlin 3 is represented by a two-dot chain line which is a virtual line.

[0053] As shown in FIGS. 13 to 15, in the brace attachment structure 1', one end of the first brace 8 and one end of the second brace 9 are attached via a brace fixing fitting 80 attached to the front surface 2F of the girder 2, which is a plane perpendicular to the plane formed by the girder 2 and the purlin 3, etc. The first brace 8 and the second brace 9 are the same round steel braces, and are composed of the metallic vanes 8a1 and 9a1, round steel bars 8b1 and 9b1 on one side, and the metallic vanes, round steel bars, etc. on the other side. In the vanes 8a1 and 9a1, bolt holes are provided on one end side of each, one end of the round steel bars 8b1 and 9b1 is fixed to one surface of the other end side of each by welding or the like, and the first bolt 86a and the second bolt 87a are inserted into the bolt holes on the one end side. The same bolt holes are also provided in the vanes on the other side, and the other end of the round steel bar is fixed to one surface of the vane by welding or the like. In this case, the first brace 8 and the second brace 9 may have the same shape, size, and dimensions as the first brace 4 and the second brace 5 that constitute the brace mounting structure 1 shown in FIGS. 1 to 3, or they may have different shapes, sizes, and dimensions. The first brace 8 is attached to reinforce the first horizontal plane HD1, and the second brace 9 is attached to reinforce the second horizontal plane HD2.

[0054] [Brace fixing brackets of other examples] As shown in FIGS. 16 and 17, the brace fixing bracket 80 is composed of a connecting piece 81, a mounting piece 82, a left rising piece 83L, and a right rising piece 83R, similar to the brace fixing bracket 10, and has a shape that is long in the left - right direction (X direction). The connecting piece 81 has the same shape as the connecting piece 11 of the brace fixing bracket 10. The first bolt hole 81h1 and the second bolt hole 81h2 are respectively provided on the left - end side (a position slightly to the right from the left end) and the right - end side (a position slightly to the left from the right end) of the connecting piece 81. The first bolt 86a and the second bolt 87a are inserted into the first bolt hole 81h1 and the second bolt hole 81h2. The mounting piece 82 is different from the mounting piece 12 of the brace fixing bracket 10. It has a horizontally long rectangular shape. A left screw hole group 82p composed of five left screw holes 82ph is provided on the left side of the center in the left - right direction, and a right screw hole group 82q composed of five right screw holes 82qh is provided on the right side of the center in the left - right direction. The left screw 88a and the right screw 89a are inserted into the left screw hole 82ph and the right screw hole 82qh. Wood screws, coarse - thread screws, screws for hard wood, universal screws, special wood screws, or lag screws, etc. are used for the left screw 88a and the right screw 89a. The left rising piece 83L has a substantially vertically long rectangular shape and is formed so as to rise from the back - side left - end portion of the connecting piece 81 and the left - end portion of the mounting piece 82. The right rising piece 83R has the same substantially vertically long rectangular shape and is formed so as to rise from the back - side right - end portion of the connecting piece 81 and the right - end portion of the mounting piece 82. In addition, recesses 84d1, 84d2, and 84d3 are respectively provided on the left side, the center, and the right side of the portion (boundary portion) at a right angle or an angle close to a right angle straddling the connecting piece 81 and the mounting piece 82.

[0055] In this case, the connecting piece 81, the mounting piece 82, the left rising piece 83L, and the right rising piece 83R are formed by bending a single metal plate, for example, a steel plate. The mounting piece 82 is bent at a right angle (including an error of several degrees) with respect to the connecting piece 81, and the left rising piece 83L and the right rising piece 83R are bent at a right angle (including an error of several degrees) with respect to the connecting piece 81 and the mounting piece 82. Further, as shown in FIG. 16, the recesses 84d1, 84d2, and 84d3 are formed by pushing in and swelling the boundary portion (a portion at a right angle or an angle close to a right angle) between the connecting piece 81 and the mounting piece 82 inward (see FIG. 17(d)). The left rising piece 13L, the right rising piece 13R, and the recesses 84d1, 84d2, and 84d3 provide strong resistance to a large force in which bending, tension, shear, torsion, etc. acting on the connecting piece 81 and the mounting piece 82 are combined.

[0056] When attaching the first brace '8 and the second brace 9 using the brace fixing fitting 80, similar to the case of attaching the brace fixing fitting 10 to the front surface 2F of the girder 2, the brace fixing fitting 80 is attached to the front surface 2F of the girder 2 so as to straddle the small beam 3 below the small beam 3. In this case, unlike the mounting piece 12 of the brace fixing fitting 10, the mounting piece 82 of the brace fixing fitting 80 is firmly fixed to the front surface 2F of the girder 2 only by the left screw group 88 composed of five left screws 88a and the right screw group 89 composed of five right screws 89a. Therefore, the left screw 88a and the right screw 89a may be ordinary screws, but it is preferable to use lag screws or coarse threads having a large withdrawal resistance. Further, the height (length in the Z direction) of the mounting piece 82 of the brace fixing fitting 80 is lower than that of the brace fixing fitting 10. When the brace fixing fitting 80 is attached to the front surface 2F of the girder 2, the distance h6 from the upper surface 2u to the upper end of the mounting piece 82 can be made larger than the distance h5 from the upper surface 2u to the bottom surface of the small beam 3 (the small beam 3 having the largest length in the Z direction). Even if the length in the Z direction of the small beam 3 assembled to the girder 2 is different, the distance h6 from the upper surface 2u to the upper end of the mounting piece 82 can be made constant (see FIG. 15). Then, after fixing the mounting piece 82 of the brace fixing bracket 80 to the front 2F of the main girder 2, one ends of the first brace 8 and the second brace 9 are attached to the connecting piece 81 of the brace fixing bracket 80 in the same way as one ends of the first brace 4 and the second brace 5 are attached to the connecting piece 11 of the brace fixing bracket 10.

[0057] Specifically, at one end of the first brace 8, with the side of the shuttlecock 8a1 to which the round steel 8b1 is fixed facing downwards, the bottom surface of the shuttlecock 8a1 is placed against the top surface of the connecting piece 81 so that the bolt hole of the shuttlecock 8a1 aligns with the first bolt hole 81h1 of the connecting piece 81, and the first bolt 86a is inserted through the bolt hole of the shuttlecock 8a1 and the first bolt hole 81h1, and a nut 86b is screwed onto the threaded portion at the tip side of the first bolt 86a to fix the shuttlecock 8a1 to the connecting piece 81. Similarly, at one end of the second brace 9, with the surface of the shuttlecock 9a1 to which the round steel 9b1 is fixed facing up, the bottom surface of the shuttlecock 9a1 is placed against the top surface of the connecting piece 81 so that the bolt hole of the shuttlecock 9a1 aligns with the second bolt hole 81h2 of the connecting piece 81, and the second bolt 87a is inserted through the bolt hole of the shuttlecock 9a1 and the second bolt hole 81h2, and a nut 87b is screwed onto the threaded portion at the tip side of the second bolt 87a to fix the shuttlecock 9a1 to the connecting piece 81. In this case, one end of the first brace 8 is attached to the connecting piece 81 by the first bolt 86a and nut 86b, so that one end of the first brace 8 can be fixed to the connecting piece 81 at any angle in the horizontal plane (XY plane). Similarly, one end of the second brace 9 is attached to the connecting piece 81 by the battledore 9a1 using the second bolt 87a and nut 87b, so that one end of the second brace 9 can be fixed to the connecting piece 81 at any angle in the horizontal plane (XY plane).

[0058] As described above, in the brace attachment structures 1 and 1', one ends of the first braces 4 and 8 and one ends of the second braces 5 and 9 are attached via the brace fixing brackets 10 and 80 attached to the front surface 2F of the girder 2, which is a plane perpendicular to the plane formed by the girder 2, the joist 3, etc. The brace fixing brackets 10 and 80 have connection pieces 11 and 81 and attachment pieces 12 and 82 formed by bending a single metal plate at a right angle. The attachment piece 12 is firmly fixed to the front surface 2F of the girder 2 by the left bolts 14a·nuts 14b, the right bolts 15a·nuts 15b, the left screw group 18, and the right screw group 19. The attachment piece 82 is firmly fixed to the front surface 2F of the girder 2 by the left screw group 88 and the right screw group 89. One ends of the first braces 4 and 8 are attached to the connection pieces 11 and 81 by the first bolts 16a and 86a inserted through the first bolt holes 11h1 and 81h1 and the nuts 16b and 86b. One ends of the second braces 5 and 9 are attached to the connection pieces 11 and 81 by the second bolts 17a and 87a inserted through the second bolt holes 11h2 and 81h2 and the nuts 17b and 87b. Therefore, one ends of the first braces 4 and 8 and one ends of the second braces 5 and 9 with arbitrary sizes can be fixed to the connection pieces 11 and 81 at arbitrary angles.

Industrial Applicability

[0059] The brace fixing bracket of the present invention can be attached to a plane perpendicular to the plane of the member forming the plane of the building, can be formed by bending a single metal flat plate, can connect two general-purpose braces of arbitrary sizes at arbitrary different angles, and can be used in a brace attachment structure for attaching braces to the planes of various buildings such as wooden buildings.

Explanation of Reference Numerals

[0060] 1, 1' Brace attachment structure 2, 2' Girder 2F Front surface of the girder 2u Upper surface of the girder 3, 3', 3" Joist 3b, 3b', 3b" Bottom surface of the joist 4, 4', 6, 6', 8 First brace 5, 5', 7, 7', 9 Second brace 4a1, 4a1’, 5a1, 5a1’, 6a1, 6a1’, 6a2, 6a2’, 7a1, 7a1’, 7a2, 7a2’, 8a1, 9a1 Badminton rackets 4ah1, 5ah1 Bolt holes 4b1, 4b1’, 5b1, 5b1’, 6b1, 6b1’, 6b2, 6b2’, 7b1, 7b1’, 7b2, 7b2’, 8b1, 9b1 Round steel 4tb, 4tb’, 5tb, 5tb’, 6tb, 6tb’, 7tb, 7tb’ Turnbuckles 10, 10’, 20, 20’, 30, 30’, 40, 40’, 50, 50’, 60, 60’ Brace fixing brackets 11, 11’, 21, 21’, 31, 31’, 41, 41’, 51’, 51’, 61, 61’ Connecting pieces 11h1 First bolt hole 11h2 Second bolt hole 12, 22, 32, 42, 52, 62 Mounting pieces 12h1 Left bolt hole 12h2 Right bolt hole 12k, 22k, 32k, 42k, 52k, 62k Notches 12p Left screw hole group 12ph Left screw hole 12q Right screw hole group 12qh Right screw hole 13L Left rising piece 13R Right rising piece 14a Left bolt 15a Right bolt 14b, 15b Nuts 16a First bolt 17a Second bolt 16b, 17b Nuts 18 Left screw group 18a Left screw 19 Right screw group 19a Right screw 70 Horizontal beam 71, 72 Columns 73 Beam 74 Intermediate beam 80 Brace fixing bracket 81 Connecting piece 81h1 First bolt hole 81h2 Second bolt hole 82 Mounting piece 82p Left screw hole group 82ph left screw hole 82q Right screw hole group 82qh Right screw hole 83L left rising piece 83R Right rising piece 84d1, 84d2, 84d3 dents 86a First bolt 87a Second bolt 86b, 87b nuts 88 Left screw group 88a left screw 89 Right screw group 89a Right screw HD1, HD11 1st horizontal plane HD2, HD12 2nd horizontal plane HD13 3rd horizontal plane HD14 4th horizontal plane HF horizontal force MO Moment P1, P2, P3, P4 tensile force VD1 First vertical plane VD2 Second vertical plane

Claims

1. A brace fixing fitting that can be attached to a vertical surface that is a plane perpendicular to the plane of a longitudinal member forming a building facade, having a mounting piece having a surface that abuts against the vertical surface, and a connecting piece that connects one end of a first brace and one end of a second brace, wherein the mounting piece and the connecting piece are formed by bending a single metal flat plate at a right angle, the mounting piece is provided with a plurality of holes for linear members for fixing the mounting piece to the vertical surface with linear members, the connecting piece is provided with a first insertion hole through which a first rod-shaped member for fixing one end of the first brace to the connecting piece at an arbitrary angle is inserted, and a second insertion hole through which a second rod-shaped member for fixing one end of the second brace to the connecting piece at an arbitrary angle is inserted, characterized in that it is a brace fixing fitting.

2. The brace fixing fitting according to claim 1, characterized in that rising pieces formed by bending the metal flat plate at a right angle are provided at longitudinal ends of the longitudinal member of the mounting piece and the connecting piece.

3. The brace fixing fitting according to claim 1, characterized in that a rectangular notch is provided on a short-side end side of the longitudinal member of the mounting piece.

4. The brace fixing fitting according to claim 1, characterized in that the first insertion hole is provided on one end side in the longitudinal direction of the connecting piece, and the second insertion hole is provided on the other end side in the longitudinal direction of the connecting piece.

5. The linear member is a bolt that engages with a nut and a screw that is screwed into the longitudinal member, and the holes for the linear members are composed of a bolt hole through which the bolt is inserted and a screw hole through which the screw is inserted, characterized in that it is a brace fixing fitting according to claim 1.

6. The first rod-shaped member is a first bolt, the first insertion hole is a first bolt hole through which the first bolt is inserted, the second rod-shaped member is a second bolt, the second insertion hole is a second bolt hole through which the second bolt is inserted, and the first brace and the second brace are round steel braces, characterized in that it is a brace fixing fitting according to claim 1.

7. A brace mounting structure mounted on a vertical surface that is a plane perpendicular to the plane of a longitudinal member forming a building facade via a brace fixing fitting, wherein the brace fixing fitting has a mounting piece having a surface that abuts against the vertical surface, and a connecting piece that connects one end of a first brace and one end of a second brace. The mounting piece and the connecting piece are formed by bending a single metal flat plate at a right angle. The mounting piece is fixed to the vertical surface by a plurality of linear members that pass through holes for linear members provided in the mounting piece. One end of the first brace is fixed to the connecting piece at an arbitrary angle by a first rod-shaped member that passes through a first insertion hole provided in the connecting piece, and one end of the second brace is fixed to the connecting piece at an arbitrary angle by a second rod-shaped member that passes through a second insertion hole provided in the connecting piece. A brace mounting structure characterized by this.

8. The structure surface is partitioned into a first structure surface and a second structure surface by another longitudinal member attached to the vertical surface, the brace fixing fitting is attached to the vertical surface straddling the other longitudinal member, the first brace is laid across the first structure surface, and the second brace is laid across the second structure surface. The brace mounting structure according to claim 7, characterized by this.

9. The linear member is a bolt that engages with a nut and a screw that is screwed into the longitudinal member. The hole for the linear member consists of a bolt hole through which the bolt passes and a screw hole through which the screw passes. The first rod-shaped member is a first bolt, and the first insertion hole is a first bolt hole through which the first bolt passes. The second rod-shaped member is a second bolt, and the second insertion hole is a second bolt hole through which the second bolt passes. The brace mounting structure according to claim 7, characterized by this.

10. One end of the first brace is fixed to the connecting piece so as not to interfere with another brace laid across the first structure surface, and one end of the second brace is fixed to the connecting piece so as not to interfere with another brace laid across the second structure surface. The brace mounting structure according to claim 8, characterized by this.

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