Joint structure for building member

Abstract

To provide a joint structure for building members that maintains a jointed state without joined building members separating, even when a toughness portion of a fixing member stretches and breaks, while possessing sufficient toughness performance and stable breaking strength, and does not require changing or redesigning a joint fixture whenever the size of a first building member and a second building member to be joined changes.SOLUTION: A joint structure for a building member used for joining a column member 2 (first building member) and a beam member 3 (second building member) comprises: an upper first fixing member 4a; an upper second fixing member 5a; an upper joint member 6a; a lower first fixing member 4b; a lower second fixing member 5b; a lower joint member 6b; three first connecting members 7a consisting of a first connection portion 7c in a square pillar shape fixed to an end of a first screw portion 7s; three second connecting members 7b consisting of a square prismatic second connecting portion 7d fixed to an end of a second screw portion 7t; and a pair of metal plates 7m and 7n positioned on both sides of the three first connection portions 7c and the three second connection portions 7d and covering three pairs of first connecting opposing surfaces and three pairs of second connecting opposing surfaces.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a joining structure for building components for joining a first building component made of various materials to a second building component made of various materials. [Background technology]

[0002] In a joining structure of building components that joins the joint surfaces of a first building component and a second building component, for example, a column component and a floor component or a column component and a beam component, sufficient toughness (elongation) performance and stable breaking strength are required. In recent years, in the field of wooden construction, as medium- to large-scale wooden buildings have been constructed, sufficient toughness performance and stable breaking strength have also come to be required for the joining structures of building components used in these wooden buildings. In view of this situation, the present applicant has proposed a structure for joining the joint surface (12f) of a pillar member (12) as a first building member and the joint surface (14f) of a floor member (14) as a second building member, as described in Patent Document 1 (JP 2020-84500 A). The structure on the pillar member (12) side is such that one or two pairs of connecting holes (18) are formed on the step surface (16f) side of each step portion (16) of the pillar member (12), and the fixing screw portion (22) of the first fixing member (20) is fixed to each connecting hole (18) by the adhesive action of the hardened adhesive (B), and the first fixing member (20) has a tough portion (26), and the adhesive force of the hardened adhesive (B) to each tough portion (26) is set to be sufficiently smaller than the adhesive force of the hardened adhesive (B) to the fixing screw portion (22) (see paragraphs 0020 to 0023 and Figures 1 and 2). In addition, the joining structure (10) between the pillar member (12) and the floor member (14) includes a plurality of anchor bolts (28) fixed to the joining surface (14f) side of the floor member (14) and a box-shaped joining metal fitting (32) arranged within each step portion (16) of the pillar member (12). The pillar member (12) and the floor member (14) are joined together by threading the first fixing screw portion (24) of the first fixing member (20) into a screw hole (36) formed in the center of the first metal fitting joint portion (34) of the joining metal fitting (32), inserting the anchor bolt (28) into an insertion hole (42) formed in the center of the second metal fitting joint portion (40) of the joining metal fitting (32), and tightening a fixing nut (44) threaded onto the second fixing screw portion (30) of the anchor bolt (28) (see paragraphs 0025 to 0028 and Figures 1 and 2).

[0003] Furthermore, the present applicant has proposed a structure for joining the joint surface (14p) of a column member (14) as a first building member and the joint surface (16p) of a beam member (16) as a second building member, as described in Patent Document 2 (Patent Publication No. 2021-165464). The structure on the pillar member (14) side is such that a plurality of horizontally extending mating grooves (14g) are formed on the joint surface (14p) side of the pillar member (14), a first connecting hole (14h) is formed on the bottom side of each mating groove (14g), and a fully threaded first fixing member (20) is fixed to each first fixing hole (14h) by the adhesive action of a hardened adhesive (B) (see paragraph 0025 and Figures 2 and 3).The structure on the beam member (16) side is such that step portions (16d) are formed at a plurality of corners on the joint surface (16p) side of the beam member (16), a second connecting hole (16h) is formed on the step surface side of each step portion (16d), and a rod-shaped second fixing member (22) is fixed to each second fixing hole (16h) by the adhesive action of a hardened adhesive (B) (see paragraph 0027 and Figures 2 and 3). The joining structure (18) of the column member (14) and the beam member (16) includes a box-shaped joint metal fitting (24) protruding from the joint surface (16p) of the beam member (16), and the portion of the joint metal fitting (24) protruding from the joint surface (16p) of the beam member (16) is fitted into each fitting groove (14g) of the column member (14). The first metal fitting joint portion (24a) of each joint metal fitting (24) is fitted into the second fixing screw portion ( 22s) are screwed together, a fixing bolt (28) is inserted into the insertion hole (24h) formed in the second fitting joint portion (24b) of each connecting fitting (24), the first fixing screw portion (20s) of the first fixing member (20) and the fixing bolt (28) are indirectly screwed together via a high nut (26), and the fixing bolt (28) is tightened to join the column member (14) and the beam member (16) (see paragraphs 0030 to 0031 and Figures 2 to 4).

[0004] In addition, Patent Document 3 (JP 2013-14940 A) describes a joining structure for wooden members, in which the left side of connecting plates (30p) and (30q) are joined to joints (16p) and (16q) of a first metal fitting (10a) fixed to a pillar (70) with lag screw bolts (60), and the right side of connecting plates (30p) and (30q) are joined to joints (26p) and (26q) of a second metal fitting (20) fixed to a beam (72) with lag screw bolts (60). Through holes (32) and elongated holes (34) are formed in the connecting plates (30p) and (30q), and the joints (16p), (16q), the joints (26p), (26q) are joined to the left side of connecting plates (30p) and (30q). The document states that after connecting the first metal fitting (10a) and the second metal fitting (20) with the bolts (40) and nuts (48), if the load acting between the first metal fitting (10a) and the second metal fitting (20) exceeds the static friction force acting between the joints (16p), (16q) and the connecting plates (30p), (30q) and between the joints (26p), (26q) and the connecting plates (30p), (30q), slippage occurs and the cylindrical portion (44) of the bolt (40) sinks into the slot (34), energy is absorbed by plastic deformation, and the toughness of the connected structure can be increased (see, in particular, Figure 2 and paragraphs 0091 to 0100). However, the invention described in Patent Document 1 is configured so that the tough portion (26) stretches and breaks before the fixing screw portion (22) and the first fixing screw portion (24) break (see paragraph 0023), while the invention described in Patent Document 2 is configured so that the tough portion (22t) stretches and breaks before the base end portion of the second fixing member (22) and the second fixing screw portion (22s) break (see paragraph 0028), which results in a problem in that the strength after breakage is significantly reduced. Furthermore, in the invention described in Patent Document 3, the joints (16p), (16q), joints (26p), (26q), and connecting plates (30p), (30q) are joined using bolts (40) and nuts (48), and the initial rigidity of the joint structure is determined by the static friction force acting between the joints (16p), (16q) and the connecting plates (30p), (30q), and between the joints (26p), (26q) and the connecting plates (30p), (30q), so it is not possible to obtain stable strength. Furthermore, since the sizes of the first metal fittings (10a), second metal fittings (20), and connecting plates (30p), (30q) are fixed, it was necessary to change or redesign the joint fittings every time the sizes of the columns (70) and beams (72) to be joined changed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-84500 A (Patent No. 7193127 A) [Patent Document 2] Patent Publication No. 2021-165464 [Patent Document 3] JP 2013-14940 A (Patent No. 5713161 A) Summary of the Invention [Problem to be solved by the invention]

[0006] The first problem to be solved by this invention is to overcome the above problems by providing a joining structure for building components that has sufficient toughness and stable fracture strength, and that can maintain the joined state without the joined building components coming apart even if the tough part of the anchoring member stretches and breaks.The second problem to be solved by this invention is to provide a joining structure for building components that does not require changing or redesigning the joining metal fittings every time the sizes of the first and second building components to be joined change. [Means for solving the problem]

[0007] The joining structure of the building components of the invention according to claim 1 to solve the above problem is as follows: a first fixing member (4a, 4b) that is fixed to a first joining hole (4h, 4i) formed in a first joining surface (2p), which is a joining surface of the first building component (2), by the adhesive action of an adhesive, and has a first fixing end (4s, 4t) on the first joining surface (2p) side; second fixing members (5a, 5b) that are fixed to second joining holes (5h, 5i) formed in a second joining surface (3p), which is a joining surface of the second building component (3), by the adhesive action of an adhesive, and have second fixing ends (5s, 5t) on the second joining surface (3p) side; and a joining member (6a, 6b) on which first fixed portions (6s, 6t) fixed to the first fixed ends (4s, 4t) and second fixed portions (6u, 6v) fixed to the second fixed ends (5s, 5t) are formed, and a first connecting member (7a) fixed to the first joint surface (2p) and having a pair of first connecting opposing surfaces extending perpendicular to the first joint surface (2p); a second connecting member (7b) fixed to the second joint surface (3p) and having a pair of second connecting opposing surfaces extending perpendicular to the second joint surface (3p); a pair of metal plates (7m, 7n) disposed on both sides of the first connecting opposing surface and the second connecting opposing surface; a friction joining structure including a one-side clamping member (7u) and an other-side clamping member (7v) that clamp the first connecting opposing surface and the second connecting opposing surface between the pair of metal plates (7m, 7n), a through-hole (7w) penetrating the first coupling opposing surface or the second coupling opposing surface is formed in one of the first coupling member (7a) and the second coupling member (7b), and an elongated hole or slit (7x) penetrating the first coupling opposing surface or the second coupling opposing surface is formed in the other of the first coupling member (7a) and the second coupling member (7b), One-side clamping member insertion portions (7e, 7f) are formed at positions corresponding to the through holes (7w) of the pair of metal plates (7m, 7n), The pair of metal plates (7m, 7n) have other-side clamping member insertion portions (7g, 7h) formed at positions corresponding to the joining surface sides of the elongated holes or the slits (7x), the one-side clamping member is inserted into the through-hole (7w) and the one-side clamping member insertion portion (7e, 7f), so that one of the first connecting member (7a) and the second connecting member (7b) can be clamped between the pair of metal plates (7m, 7n), The other clamping member (7v) is inserted into the elongated hole or slit (7x) and the other clamping member insertion portion (7g, 7h), so that the other of the first connecting member (7a) and the second connecting member (7b) can be clamped between the pair of metal plates (7m, 7n). The numbers in parentheses are the drawing numbers corresponding to the respective components in the description of the first embodiment.

[0008] The invention according to claim 2 for solving the above problem is the joining structure of the building components according to claim 1, The fixing and joining structure is provided between the first joining surface (2p) and the vicinity of one end of the second joining surface (3p), The fixing and joining structure is provided between the first joining surface (2p) and the vicinity of the other end of the second joining surface (3p), The friction-bonded structure is provided between the first bonding surface (2p) and the second bonding surface (3p) near the center thereof.

[0009] The invention according to claim 3 for solving the above problem is the joining structure of the building components according to claim 1, The friction joining structure is provided between the first joining surface (2p) and the vicinity of one end of the second joining surface (3p), The friction joining structure is provided between the first joining surface (2p) and the vicinity of the other end of the second joining surface (3p), The fixing and joining structure is provided between the first joining surface (2p) and the second joining surface (3p) near the center thereof.

[0010] The invention according to claim 4 for solving the above problem is a joining structure for building components according to any one of claims 1 to 3, The friction joining structure is characterized in that it comprises multiple sets of the first connecting member (7a) and the second connecting member (7b), and the pair of metal plates (7m, 7n) are arranged on both sides of multiple sets of the first connecting opposing surfaces and the second connecting opposing surfaces.

[0011] The invention according to claim 5 for solving the above problem is a joining structure for building components according to any one of claims 1 to 3, The first connecting member (7a) comprises a first screw portion (7s) screwed into the first joint surface (2p) and a rectangular column-shaped, rectangular tubular, or U-shaped member (7c) fixed to an end of the first screw portion (7s), The second connecting member (7b) comprises a second screw portion (7t) screwed into the second joint surface (3p) and a rectangular column-shaped, rectangular tubular, or U-shaped member (7d) fixed to an end of the second screw portion (7t), The pair of metal plates (7m, 7n) are characterized by being arranged on both the outer sides of the first connecting opposing surface and the second connecting opposing surface. [Effects of the Invention]

[0012] The joining structure for building components according to claim 1 has a fixed joining structure consisting of a first fixing member (4a, 4b), a second fixing member (5a, 5b), and joining members (6a, 6b) on which a first fixing portion (6s, 6t) and a second fixing portion (6u, 6v) are formed, and also has a friction joining structure consisting of a first connecting member (7a), a second connecting member (7b), and a pair of metal plates (7m, 7n), and therefore has sufficient toughness performance and stable breaking strength. Furthermore, one side clamping member (7u) is inserted into the through hole (7w) and the one side clamping member insertion portion (7e, 7f), and the other side clamping member (7v) is inserted into the long hole or slit and the other side clamping member insertion portion (7g, 7h), and the first connecting member (7a), the second connecting member (7b) and the pair of metal plates (7m, 7n) are clamped and frictionally joined by the one side clamping member (7u) and the other side clamping member (7v), and the frictionally joined portions can shift and maintain their joined state even if a strong load is applied between the first joining surface (2p) and the second joining surface (3p).Therefore, even if the first fixing member (4a, 4b) and / or the second fixing member (5a, 5b) breaks, the joined first building member (2) and second building member (3) will not come apart and can maintain their joined state.

[0013] According to the invention of claim 2, in addition to the effect of the invention of claim 1, since two sets of fixed joining structures are provided, toughness performance and fracture strength can be further improved.

[0014] According to the invention of claim 3, in addition to the effect of the invention of claim 1, two sets of friction joining structures are provided, so that even if the first fixing member (4a, 4b) and / or the second fixing member (5a, 5b) breaks, the risk of the joined first building member (2) and second building member (3) coming apart can be further reduced.

[0015] According to the invention of claim 4, in addition to the effects of the invention of any one of claims 1 to 3, the friction welding structure has multiple sets of first connecting members (7a) and second connecting members (7b), and a pair of metal plates (7m, 7n) is arranged on both sides of the multiple sets of first connecting opposing surfaces and second connecting opposing surfaces, so the friction welding structure itself is less likely to be destroyed, and even if the sizes of the first building members (2) and second building members (3) to be joined change, strength commensurate with their sizes can be ensured simply by changing the number of first connecting members (7a) and second connecting members (7b) and the size of the pair of metal plates (7m, 7n).

[0016] According to the invention of claim 5, in addition to the effects of the invention of any one of claims 1 to 3, the first connecting member (7a) in the friction joining structure consists of a first screw portion (7s) that is screwed into the first joining surface (2p) and a rectangular column-shaped, rectangular tubular, or U-shaped member (7c) that is fixed to the end of the first screw portion (7s), and the second connecting member (7b) consists of a second screw portion (7t) that is screwed into the second joining surface (3p) and a rectangular column-shaped, rectangular tubular, or U-shaped member (7d) that is fixed to the end of the second screw portion (7t), and the pair of metal plates (7m, 7n) are arranged on both outsides of the first joining opposing surface and the second joining opposing surface, so that the first joining opposing surface and the second joining opposing surface are less likely to bend, making the joining state more stable. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a diagram showing an architectural structure to which a joining structure for architectural members according to Example 1 is applied. [Figure 2] 1A and 1B are diagrams illustrating a joining structure of a building member according to a first embodiment. [Figure 3] 3A and 3B are diagrams illustrating the structures of a first connecting member and a second connecting member according to the first embodiment. [Figure 4] FIG. 10 is a diagram illustrating the state after the joint structure of the construction member according to the first embodiment has been moved. [Figure 5] FIG. 10 is a diagram illustrating a joining structure of a building member according to a second embodiment. [Figure 6] 10A and 10B are diagrams illustrating a joining structure of a building member according to a third embodiment. [Figure 7] 10A and 10B are diagrams illustrating a joining structure of a building member according to a fourth embodiment. [Figure 8] 10 is a diagram illustrating a joining structure of a building member according to a fifth embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] Fig. 1 shows a rigid-frame structure to which the connection structures for building components according to Examples 1 to 5 are applied, and is an architectural structure particularly suitable for medium- to large-scale wooden buildings. Fig. 1 also shows an architectural structure to which the connection structure for building components according to Example 1 is applied. The architectural structure in Figure 1 consists of a floor member (foundation) 1 made of concrete, a plurality of column members 2 made of wood material, concrete (including reinforced concrete), stone, etc., erected on the floor member 1, and beam members 3 made of wood material and installed between adjacent column members 2. In the specification and claims of this application, a "first building component" refers to any one of a floor component, a column component, a beam component, and a girder component, and a "second building component" refers to any one of a beam component, a girder component, and a column component that is joined to the first building component. Furthermore, the term "provided" does not only indicate being directly provided, but also includes being indirectly provided via another component. [Example]

[0019] 2A and 2B are diagrams illustrating the joining structure of building components according to Example 1, with Fig. 2A being a side cross-sectional view of the entire joining structure of building components according to Example 1 and Fig. 2B being a cross-sectional view of the upper part of a friction-jointed structure, which will be described later, cut along a horizontal plane. As shown in Figs. 2A and 2B, the architectural structure to which the joining structure of building components according to Example 1 is applied includes an upper fixing joining structure made up of members (1) to (3), a lower fixing joining structure made up of members (4) to (6), and a friction-jointed structure made up of members (7) to (9), which will be described below, in order to join a first joining surface 2p of a column member 2 as a first building component and a second joining surface 3p of a beam member 3 as a second building component.

[0020] (1) An upper first fixing member 4a that is fixed to an upper first connecting hole 4h formed near the upper end of the first connecting surface 2p by the adhesive action of an adhesive and has an upper first fixing end portion 4s into which an upper fixing bolt 6m can be screwed onto the first connecting surface 2p side. In Example 1, the upper first connecting hole 4h extends horizontally, the upper first anchoring member 4a is made of steel, and the end face of the upper first fixed end 4s is flush with the first connecting surface 2p. Furthermore, a curing adhesive containing epoxy resin or the like as a main component is suitable as the adhesive. (2) An upper second fixing member 5a, whose upper base end 5q is fixed to an upper second joining hole 5h formed near the upper end of the second joining surface 3p by the adhesive action of an adhesive, has an upper second fixing end 5s on the second joining surface 3p side, and has an upper tough portion 5u between the upper base end 5q and the upper second fixing end 5s. In Example 1, the upper second connecting hole 5h extends horizontally, the upper base end 5q is made of steel, and the upper second fixed end 5s protrudes from the second connecting surface 3p. In addition, a curing adhesive containing epoxy resin or the like as a main component is suitable as the adhesive. The upper tough portion 5u is intended to ensure the longitudinal toughness of the upper second fixing member 5a and is configured to stretch and break before the upper base end 5q or the upper second fixing end 5s break. Furthermore, the adhesive strength of the upper tough portion 5u is set to be sufficiently smaller than the adhesive strength of the adhesive to the upper base end 5q. This allows the upper fixing joint structure to have sufficient toughness and stable fracture strength. (3) An upper joining member 6a consisting of a box-shaped upper joining fitting 6y having a hollow portion 6w penetrating at least one pair of opposing side surfaces, an upper first fixing portion 6s fixed to the upper first fixing end 4s, and an upper second fixing portion 6u fixed to the upper second fixing end 5s. The upper first fixing portion 6s in Example 1 consists of an upper insertion hole (not shown) formed in the center of the side surface that comes into surface contact with the first joint surface 2p of the upper connecting fitting 6y and an upper fixing bolt 6m, and the upper second fixing portion 6u consists of an upper screw hole (not shown) formed in the center of the side surface that comes into surface contact with the second joint surface 3p of the upper connecting fitting 6y. Then, the upper first fixed end 4s is aligned with the upper insertion hole, and the upper fixing bolt 6m is tightened from the side of the upper connecting fitting 6y using a tightening tool such as a wrench, and screwed into the upper first fixed end 4s, thereby fixing the upper connecting member 6a to the upper first fixed end 4s. Furthermore, when the threaded portion cut in the upper second fixed end portion 5s is screwed into the upper screw hole of the upper second fixed portion 6u, the upper joining member 6a is fixed to the upper second fixed end portion 5s.

[0021] (4) A lower first fixing member 4b that is fixed to a lower first connecting hole 4i formed near the lower end of the first connecting surface 2p by the adhesive action of an adhesive and has a lower first fixing end 4t into which a lower fixing bolt 6n can be screwed onto the first connecting surface 2p side. (5) A lower base end portion 5r is fixed to a lower second joining hole 5i formed near the lower end of the second joining surface 3p by the adhesive action of an adhesive, and a lower second fixing member 5b has a lower second fixing end portion 5t on the second joining surface 3p side and a lower tough portion 5v between the lower base end portion 5r and the lower second fixing end portion 5t. (6) A lower joining member 6b having a lower first fixing portion 6t fixed to the lower first fixing end portion 4t and a lower second fixing portion 6v fixed to the lower second fixing end portion 5t. The lower first fixing member 4b, the lower second fixing member 5b, and the lower joining member 6b have the same configuration as the upper first fixing member 4a, the upper second fixing member 5a, and the upper joining member 6a. That is, the lower first connecting hole 4i and the lower second connecting hole 5i extend horizontally, the lower first fixing member 4b and the lower base end portion 5r are made of steel, the end face of the lower first fixed end portion 4t is flush with the first joint surface 2p, the lower second fixed end portion 5t protrudes from the second joint surface 3p, a hardening adhesive whose main component is epoxy resin or the like is suitable as the adhesive, the lower tough portion 5v is configured to stretch and break before the lower base end portion 5r and the lower second fixed end portion 5t break, and the adhesive strength of the adhesive to the lower tough portion 5v is set to be sufficiently smaller than the adhesive strength of the adhesive to the lower base end portion 5r. The lower connecting member 6b is a box-shaped lower connecting fitting 6z having a hollow portion 6w penetrating at least one pair of opposing side surfaces, the lower first fixing portion 6t consisting of a lower insertion hole (not shown) and a lower fixing bolt 6n, and the lower second fixing portion 6v consisting of a lower screw hole (not shown). Then, by aligning the positions of the lower first fixed end 4t and the lower insertion hole and tightening the lower fixing bolt 6n from the side of the lower connecting fitting 6z with a tightening tool such as a wrench and screwing it into the lower first fixed end 4t, the lower connecting member 6b is fixed to the lower first fixed end 4t, and by screwing the threaded portion cut into the lower second fixed end 5t into the lower screw hole of the lower second fixed portion 6v, the lower connecting member 6b is fixed to the lower second fixed end 5t.

[0022] (7) Three first coupling members 7a each consisting of a first screw portion 7s that is screwed into the first joint surface 2p and a first connecting portion 7c that is shaped like a rectangular pillar and is fixed to the end of the first screw portion 7s. The first connecting portion 7c of Example 1 has a through hole 7w formed therein that penetrates a pair of opposing surfaces (hereinafter referred to as "first connecting opposing surfaces") extending perpendicular to the first connecting surface 2p when fixed to the first joining surface 2p, allowing one first hex bolt 7u to pass through. (8) Three second coupling members 7b each consisting of a second screw portion 7t screwed into the second joint surface 3p and a second connecting portion 7d in the shape of a rectangular pillar fixed to the end of the second screw portion 7t. The second connection portion 7d of Example 1 has a slit 7x formed therein that penetrates a pair of opposing surfaces (hereinafter referred to as "second connecting opposing surfaces") that extend perpendicular to the second joint surface 3p when fixed to the second joint surface 3p, allowing one second hex bolt 7v to pass through. (9) Three first screw portions 7s are screwed into the vicinity of the center of the first joint surface 2p, and three first connecting portions 7c are fixed adjacent to each other. Three second screw portions 7t are screwed into the vicinity of the center of the second joint surface 3p, and three second connecting portions 7d are fixed adjacent to each other. In this state, the tips of the three first connecting portions 7c and the tips of the three second connecting portions 7d are butted against each other. A pair of metal plates 7m, 7n are arranged on both sides of the three first connecting portions 7c and the three second connecting portions 7d (on the front and back of the paper in Figure 2(A)) and cover the three pairs of first connecting opposing surfaces and the three pairs of second connecting opposing surfaces. In the metal plates 7m and 7n of Example 1, one-side clamping member insertion portions 7e and 7f are formed at positions corresponding to the three through holes 7w, and the other-side clamping member insertion portions 7g and 7h are formed at positions corresponding to the second joint surface 3p side of the three slits 7x. The first hexagon bolt 7u can be inserted through the three one-side clamping member insertion portions 7e formed on the metal plate 7m, and the second hexagon bolt 7v can be inserted through the three other-side clamping member insertion portions 7g formed on the metal plate 7m. Furthermore, the three one-side clamping member insertion portions 7f formed on the metal plate 7n have threads into which the first hexagon bolt 7u is screwed, and the three other-side clamping member insertion portions 7h formed on the metal plate 7n have threads into which the second hexagon bolt 7v is screwed.

[0023] FIG. 3 is a diagram illustrating the structure of the first connecting member 7a and the second connecting member 7b of the first embodiment. Figure 3(A) is a plan view (top), left side view (bottom left), front view (bottom center), and right side view (bottom right) of the first connecting portion 7c fixed to the end of the first screw portion 7s, and Figure 3(B) is a front view of the first connecting member 7a with the first connecting portion 7c fixed to the first screw portion 7s. Also, Figure 3(C) is a plan view (top), left side view (bottom left), front view (bottom center), and right side view (bottom right) of the second connecting portion 7d fixed to the end of the second screw portion 7t, and Figure 3(D) is a front view of the second connecting member 7b with the second connecting portion 7d fixed to the second screw portion 7t. As shown in FIG. 3(A), the first connecting portion 7c is a columnar body having a regular tetrahedron shape, and the columnar body has a first recess 7j formed in the center of the left side surface for screwing in and fixing the first screw portion 7s, and a through hole 7w formed through the columnar body from the front surface to the back surface, which serves as the first coupling opposing surface. As shown in FIG. 3(C), the second connecting portion 7d is a rectangular parallelepiped whose cross section perpendicular to the longitudinal direction is the same square as one side of the first connecting portion 7c, and the rectangular parallelepiped has a second recess 7k formed in the center of the right side for screwing in and fixing the second screw portion 7t, and a slit 7x that penetrates from the front to the back, which forms the second connecting opposing surface. In Example 1, the diameter and length of the first screw portion 7s and the second screw portion 7t are 30 mm and 250 mm, respectively, one side of the regular tetrahedron is 60 mm, the short side and long side of the rectangular parallelepiped are 60 mm and 80 mm, respectively, the diameter and depth of the first recess 7j are 30 mm and 14 mm, respectively, the diameter of the through hole 7w is 14 mm, and the width and length of the slit 7x are 14 mm and 47 mm, respectively, but these dimensions can be changed as appropriate depending on the size and thickness of the column member (first building member) 2 and the beam member (second building member) 3.

[0024] Figure 4 is a diagram illustrating the state after the joining structure of the building components of Example 1 has moved, and Figures 4(A) and (B) are a side cross-sectional view of the entire joining structure and a cross-sectional view of the friction joining structure after the column member 2 and the beam member 3 have been pulled and moved in the left-right direction. As explained in (2) and (6) above, when the column member 2 and the beam member 3 are pulled in the left-right direction, the upper ductile portion 5u and the lower ductile portion 5v are configured to stretch before the upper base end portion 5q, the upper second fixed end portion 5s, and the lower base end portion 5r, and the lower second fixed end portion 5t break, respectively.Furthermore, when the column member 2 and the beam member 3 are pulled in the left-right direction, the upper ductile portion 5u and the lower ductile portion 5v are ultimately configured to break earlier than the other parts of the joint structure. Furthermore, as explained in (7) to (9) above, when the tips of the three first connection portions 7c and the three second connection portions 7d are butted together, the three pairs of first connecting opposing surfaces and the three pairs of second connecting opposing surfaces are covered with a pair of metal plates 7m, 7n, and when the first hexagon bolt 7u is screwed into the one-side clamping member insertion portion 7f through the one-side clamping member insertion portion 7e and the through hole 7w, and the second hexagon bolt 7v is screwed into the other-side clamping member insertion portion 7h through the other-side clamping member insertion portion 7g and the slit 7x, the first connecting opposing surfaces and the second connecting opposing surfaces are sandwiched between the pair of metal plates 7m, 7n. When the column member 2 and the beam member 3 are pulled in the left-right direction in this state, the load acting between the first connecting member 7a and the second connecting member 7b exceeds the static friction force acting on the second connecting opposing surface clamped by the second hex bolt 7v and the pair of metal plates 7m, 7n, causing slippage and causing the three second connecting portions 7d, the three first connecting portions 7c, and the pair of metal plates 7m, 7n to move relative to each other, resulting in a state as shown in Figures 4(A) and (B). Therefore, the fixed portion between the column member 2 and the first screw portion 7s, the fixed portion between the first connection portion 7c and the first screw portion 7s, the fixed portion between the beam member 3 and the second screw portion 7t, and the fixed portion between the second connection portion 7d and the second screw portion 7t are not destroyed, thereby improving the toughness of the joint structure. Furthermore, by making the slit 7x sufficiently long, even if the upper ductile portion 5u and the lower ductile portion 5v of the second fixing members 5a, 5b are broken, the column member 2 and the beam member 3 can be maintained in a joined state without coming apart.

[0025] Next, a construction method for joining a column member 2 (first building member) and a beam member 3 (second building member) using the joining structure for building members according to the first embodiment will be described. Prior to joining the column member 2 and the beam member 3, the upper first fixing member 4a and the lower first fixing member 4b are fixed in the upper first connecting hole 4h and the lower first connecting hole 4i, respectively, and three first connecting portions 7c are fixed adjacent to each other at predetermined positions on the column member 2. Furthermore, the upper second fixing end 5s and the lower second fixing end 5t are screwed into the upper screw hole of the upper second fixing portion 6u and the lower screw hole of the lower second fixing portion 6v, respectively, and then the upper base end 5q and the upper ductile portion 5u and the lower base end 5r and the lower ductile portion 5v are fixed in the upper second connecting hole 5h and the lower second connecting hole 5i, respectively, thereby fixing the upper connecting fitting 6y and the lower connecting fitting 6z. Furthermore, three second connecting portions 7d are fixed adjacent to each other at predetermined positions on the beam member 3.

[0026] (Construction procedure 1) Second building component lifting process: The beam component 3 is lifted using a crane or the like and placed in a horizontal position. After that, the beam component 3 is moved to a position where the first connection part 7c fixed to the column component 2 does not interfere with the upper and lower connector fittings 6y and 6z fixed to the beam component 3, and the tip surface of the first connection part 7c and the tip surface of the second connection part 7d are on the same plane and at the same height. (Construction procedure 2) Joint surface alignment process: The beam member 3 is moved horizontally to align the position of the upper first fixed end 4s with the position of the upper insertion hole and the position of the lower first fixed end 4t with the position of the upper insertion hole, and the tip faces of the three first connection portions 7c and the tip faces of the three second connection portions 7d are butted together. (Construction procedure 3) Fixing process of the fixed joint structure: Insert the upper fixing bolt 6m into the upper insertion hole, insert a tightening tool such as a wrench into the hollow portion 6w of the upper joint fitting 6y from the front or back side, rotate the upper fixing bolt 6m, and screw it into the upper first fixed end portion 4s to tighten it. Furthermore, the lower fixing bolt 6n is inserted into the lower insertion hole, and a tightening tool such as a wrench is inserted into the hollow portion 6x of the lower connecting member 6z from the front or rear side to rotate the lower fixing bolt 6n and screw it into the lower first fixed end portion 4t to tighten it. This fixes the upper connecting member 6y to the upper first fixed end portion 4s, and the lower connecting member 6z to the lower first fixed end portion 4t. (Construction procedure 4) Friction joint structure fixing process: The front and back sides (both sides of the first connecting surface and the second connecting surface) of the three first connecting portions 7c and the three second connecting portions 7d, whose tips are butted together, are covered with a pair of metal plates 7m and 7n. Thereafter, three first hexagon bolts 7u are inserted from the front side of one-side clamping member insertion portion 7e and screwed into one-side clamping member insertion portion 7f. Furthermore, three second hexagon bolts 7v are inserted from the front side of the other-side clamping member insertion portion 7g and screwed into the other-side clamping member insertion portion 7h. In this way, the three first connecting portions 7c and the three second connecting portions 7d (first connecting opposing surfaces and second connecting opposing surfaces) are sandwiched between the pair of metal plates 7m and 7n. [Example]

[0027] FIG. 5 is a diagram illustrating the joint structure of the building members according to the second embodiment, and corresponds to FIG. 2(A) of FIG. 2 illustrating the joint structure of the building members according to the first embodiment. The joining structure of the building component of Example 2 differs from the joining structure of the building component of Example 1 only in that the lower joining member 6b is omitted from the joining structure of the building component of Example 1, and instead a friction joining structure is placed near the lower ends of the first joining surface 2p and the second joining surface 3p, that there are two upper second joining holes 5h to improve toughness performance and fracture strength, and that an upper second joining hole 5h', an upper base end portion 5q', an upper second fixed end portion 5s' and an upper tough portion 5u' are added, and that an upper second fixed portion 6u' is added. The explanation regarding the upper fixing joint structure of Example 2 is simply the addition of the upper second joining hole 5h', the upper base end portion 5q', the upper second fixed end portion 5s', the upper tough portion 5u' and the upper second fixed portion 6u' to the explanations (1) to (3) regarding the upper fixing joint structure of Example 1, and the cross-sectional view of the upper part of the friction joint structure cut along a horizontal plane and the diagram explaining the structure of the first connecting member 7a and the second connecting member 7b are the same as Figure 2(B) and Figure 3, respectively. In addition, in order to improve the toughness performance and fracture strength of the friction welding structure of Example 2, the three first connecting portions 7c and second connecting portions 7d in the friction welding structure of Example 1 are changed to four first connecting portions 7c and second connecting portions 7d. However, the explanation of the friction welding structure of Example 2 is the same as the explanation of the friction welding structure of Example 1 in (7) to (9) above, except that the number of first connecting members 7a, second connecting members 7b, first connecting portions 7c and second connecting portions 7d is changed from three to four, and their fixing positions are changed from near the center of the first joining surface 2p and the second joining surface 3p to near the lower end. Therefore, the explanation of the upper fixing joining structure and friction joining structure of Example 2 will be omitted, and in Figure 5 which explains Example 2, the same numbers as in Figures 1 to 4 will be used for all parts except the upper second joining hole 5h', the upper base end portion 5q', the upper second fixed end portion 5s' and the upper tough portion 5u'.

[0028] A construction method for joining a column member 2 (first building member) and a beam member 3 (second building member) using a joining structure for building members according to Example 2 will be described. Prior to joining the column member 2 and the beam member 3, the upper first fixing member 4a is fixed in the upper first connecting hole 4h, and four first connecting portions 7c are fixed adjacent to each other at predetermined positions on the column member 2. Furthermore, after the upper second fixing end portions 5s, 5s' are screwed into the upper screw holes of the upper second fixing portions 6u, 6u', the upper base end portions 5q, 5q' and upper tough portions 5u, 5u' are fixed in the upper second connecting holes 5h, 5h', and the upper connecting fitting 6y is fixed. Furthermore, four second connecting portions 7d are fixed adjacent to each other at predetermined positions on the beam member 3.

[0029] (Construction procedure 1) Second building component lifting process: The beam component 3 is lifted using a crane or the like and placed in a horizontal position. After that, the beam component 3 is moved so that the tip surface of the first connection part 7c and the tip surface of the second connection part 7d fixed to the beam component 3 are on the same plane and the height of the latter is equal to or greater than the height of the former. (Construction procedure 2) Joint surface alignment process: The beam member 3 is moved horizontally and / or downward to align the position of the upper first fixed end portion 4s with the upper insertion hole, and the tip surfaces of the four first connection portions 7c and the tip surfaces of the four second connection portions 7d are butted together. (Construction Procedure 3) Fixing process of the anchoring joint structure: Insert the upper fixing bolt 6m into the upper insertion hole, insert a tightening tool such as a wrench into the hollow portion 6w of the upper joint metal fitting 6y from the front or rear side, rotate the upper fixing bolt 6m, and screw it into the upper first fixed end portion 4s to tighten it. This fixes the upper joint metal fitting 6y to the upper first fixed end portion 4s. (Construction procedure 4) Friction joint structure fixing process: The front and back sides (both the first connecting surfaces and the second connecting surfaces) of the four first connecting parts 7c and the four second connecting parts 7d, whose tips are butted together, are covered with a pair of metal plates 7m and 7n. Thereafter, four first hexagon bolts 7u are inserted from the front side of one-side clamping member insertion portion 7e and screwed into one-side clamping member insertion portion 7f. Furthermore, four second hexagon bolts 7v are inserted from the front side of the other-side clamping member insertion portion 7g and screwed into the other-side clamping member insertion portion 7h. In this way, the four first connecting portions 7c and the four second connecting portions 7d (first connecting opposing surfaces and second connecting opposing surfaces) are sandwiched between the pair of metal plates 7m and 7n. [Example]

[0030] FIG. 6 is a diagram illustrating the joint structure of the building components according to the third embodiment, and corresponds to FIG. 2(A) of FIG. 2 illustrating the joint structure of the building components according to the first embodiment. The joining structure of the building component of Example 3 is such that the upper and lower fixed joining structures of Example 1 are replaced with the friction joining structure of Example 1, resulting in an upper friction joining structure and a lower friction joining structure, and the friction joining structure of Example 1 is replaced with the upper fixed joining structure of Example 2. The explanation regarding the upper fixing joint structure of Example 3 is simply the addition of the upper second joining hole 5h', the upper base end portion 5q', the upper second fixed end portion 5s', the upper tough portion 5u' and the upper second fixed portion 6u' to the above explanations (1) to (3) regarding the upper fixing joint structure of Example 1, and the cross-sectional view of the upper part of the upper friction joint structure cut along a horizontal plane and the diagram explaining the structure of the first connecting member 7a and the second connecting member 7b are the same as Figure 2(B) and Figure 3, respectively. Furthermore, the friction welding structure of Example 3 is composed of two sets of structures: an upper friction welding structure arranged near the upper ends of the first joining surface 2p and the second joining surface 3p, and a lower friction welding structure arranged near the lower ends of the first joining surface 2p and the second joining surface 3p, and the configurations of each are exactly the same as the friction welding structure of Example 1 described above in (7) to (9). Therefore, the explanation of the upper fixed joining structure, upper friction joining structure and lower friction joining structure of Example 3 will be omitted, and in Figure 6 which explains Example 3, the same numbers as in Figure 5 will be used for the upper fixed joining structure, the same numbers as in Figure 2 will be used for the upper friction joining structure, numbers with a prime added to the numbers in Figure 2 will be used for the lower friction joining structure, and the same numbers as in Figures 1 to 4 will be used for the other configurations.

[0031] A construction method for joining a column member 2 (first building member) and a beam member 3 (second building member) using a joining structure for building members according to Example 3 will be described. Prior to joining the column member 2 and the beam member 3, the upper first fixing member 4a is fixed in the upper first connecting hole 4h, and the three first connecting portions 7c, 7c' are fixed adjacent to each other at predetermined positions on the column member 2. Furthermore, after the upper second fixing end portions 5s, 5s' are screwed into the upper screw holes of the upper second fixing portions 6u, 6u', the upper base end portions 5q, 5q' and upper tough portions 5u, 5u' are fixed in the upper second connecting holes 5h, 5h', and the upper connecting fitting 6y is fixed. Furthermore, the three second connecting portions 7d, 7d' are fixed adjacent to each other at predetermined positions on the beam member 3.

[0032] (Construction procedure 1) Second building component lifting process: The beam component 3 is lifted using a crane or the like and placed in a horizontal position. After that, the beam component 3 is moved to a position where the first connection parts 7c, 7c' fixed to the column component 2 do not interfere with the upper connector fitting 6y fixed to the beam component 3, and the tip surfaces of the first connection parts 7c, 7c' and the tip surfaces of the second connection parts 7d, 7d' are on the same plane and at the same height. (Construction procedure 2) Joint surface alignment process: The beam member 3 is moved horizontally to align the position of the upper first fixed end 4s with the upper insertion hole, and the tip faces of the three first connection parts 7c, 7c' are butted up against the tip faces of the three second connection parts 7d, 7d'. (Construction Procedure 3) Fixing process of the anchoring joint structure: Insert the upper fixing bolt 6m into the upper insertion hole, insert a tightening tool such as a wrench into the hollow portion 6w of the upper joint metal fitting 6y from the front or rear side, rotate the upper fixing bolt 6m, and screw it into the upper first fixed end portion 4s to tighten it. This fixes the upper joint metal fitting 6y to the upper first fixed end portion 4s. (Construction procedure 4) Friction joint structure fixing process: The front and back sides (both sides of the first connecting surface and the second connecting surface) of the three first connecting portions 7c and the three second connecting portions 7d, whose tips are butted together, are covered with a pair of metal plates 7m and 7n, and the front and back sides (both sides of the first connecting surface and the second connecting surface) of the three first connecting portions 7c' and the three second connecting portions 7d' are covered with a pair of metal plates 7m' and 7n'. Then, three first hexagon bolts 7u and three first hexagon bolts 7u' are inserted from the front side of the one-side clamping member insertion portion and screwed into the one-side clamping member insertion portion. Furthermore, three second hexagon bolts 7v and three second hexagon bolts 7v' are inserted from the front side of the other-side clamping member insertion portion and screwed into the other-side clamping member insertion portion. In this way, the three first connection portions 7c and the three second connection portions 7d (first and second connecting opposing surfaces) and the three first connection portions 7c' and the three second connection portions 7d' (first and second connecting opposing surfaces) are each sandwiched between a pair of metal plates. [Example]

[0033] FIG. 7 is a diagram illustrating the joint structure of the building members according to the fourth embodiment, and corresponds to FIG. 2 illustrating the joint structure of the building members according to the first embodiment. The joining structure of the building components of Example 4 differs from the joining structure of the building components of Example 1 only in that the rectangular column-shaped first connecting portion 7c and second connecting portion 7d in the friction joining structure of Example 1 are replaced with T-shaped first connecting portion 7C and second connecting portion 7D, the metal plate 7n is replaced with a metal plate 7N without threads, and nuts 7R are added to thread onto the first hex bolt 7u and second hex bolt 7v. The explanations regarding the upper and lower fixing and joining structures of the fourth embodiment are the same as the explanations (1) to (6) regarding the same structures of the first embodiment. Therefore, the description of the upper and lower fixing and joining structures of Example 2 will be omitted, and the friction joining structure of Example 4 will be described in the following (7') to (10'). In addition, in Figure 7, which explains Example 4, the same numbers as in Figures 1 to 4 are used for all parts except the first connecting member 7A and the second connecting member 7B, the T-shaped first connecting portion 7C and the second connecting portion 7D, the one-side clamping member insertion portion 7F and the other-side clamping member insertion portion 7H, the metal plate 7N, and the nut 7R.

[0034] (7') Three first coupling members 7A each consisting of a first screw portion 7s that is screwed into the first joint surface 2p and a T-shaped first connecting portion 7C that is fixed to the end of the first screw portion 7s. The first connection portion 7C of Example 1 has a through hole 7w formed therein that penetrates a pair of opposing surfaces (hereinafter referred to as "first connecting opposing surfaces") extending perpendicular to the first joint surface 2p when fixed to the first joint surface 2p, allowing one first hex bolt 7u to pass through. (8') Three second coupling members 7B each consisting of a second screw portion 7t screwed into the second joint surface 3p and a T-shaped second connecting portion 7D fixed to the end of the second screw portion 7t. The second connection portion 7D of Example 1 has a slit 7x formed therein that penetrates a pair of opposing surfaces (hereinafter referred to as "second connecting opposing surfaces") that extend perpendicular to the second joint surface 3p when fixed to the second joint surface 3p, allowing one second hex bolt 7v to pass through. (9') Three first screw portions 7s are screwed into the vicinity of the center of the first joint surface 2p, and three first connecting portions 7C are fixed adjacent to each other. Three second screw portions 7t are screwed into the vicinity of the center of the second joint surface 3p, and three second connecting portions 7D are fixed adjacent to each other. Then, the tips of the three first connecting portions 7C and the tips of the three second connecting portions 7D are butted against each other. A pair of metal plates 7m, 7N are arranged on both sides of the three first connecting portions 7C and the three second connecting portions 7D (on the front and back of the paper in Figure 7(A)) and cover the three pairs of first connecting opposing surfaces and the three pairs of second connecting opposing surfaces. In the metal plates 7m and 7N of Example 4, one-side clamping member insertion portions 7e and 7F are formed at positions corresponding to the three through holes 7w, and the other-side clamping member insertion portions 7g and 7H are formed at positions corresponding to the second joint surface 3p side of the three slits 7x. Furthermore, a first hexagon bolt 7u can be passed through the three one-side clamping member insertion portions 7e formed on the metal plate 7m and the three one-side clamping member insertion portions 7F formed on the metal plate 7N, and a second hexagon bolt 7v can be passed through the three other-side clamping member insertion portions 7g formed on the metal plate 7m and the three other-side clamping member insertion portions 7H formed on the metal plate 7N. (10') Nut 7R threaded onto first hexagon bolt 7u and second hexagon bolt 7v. Metal plates 7m and 7N are placed on both sides of the first connecting opposing surface and the second connecting opposing surface, and nuts 7R are screwed onto the tips of the first hexagonal bolt 7u and the second hexagonal bolt 7v inserted into the one-side clamping member insertion portions 7e and 7F and the other-side clamping member insertion portions 7g and 7H and tightened, thereby clamping and fixing the T-shaped first connecting portion 7C and the second connecting portion 7D.

[0035] Next, a construction method for joining a column member 2 (first building member) and a beam member 3 (second building member) using a joining structure for building members according to Example 4 will be described. Prior to joining the column member 2 and the beam member 3, the upper first fixing member 4a and the lower first fixing member 4b are fixed in the upper first connecting hole 4h and the lower first connecting hole 4i, respectively, and three first connecting portions 7C are fixed adjacent to each other at predetermined positions on the column member 2. Furthermore, the upper second fixing end 5s and the lower second fixing end 5t are screwed into the upper screw hole of the upper second fixing portion 6u and the lower screw hole of the lower second fixing portion 6v, respectively, and then the upper base end 5q and the upper ductile portion 5u and the lower base end 5r and the lower ductile portion 5v are fixed in the upper second connecting hole 5h and the lower second connecting hole 5i, respectively, thereby fixing the upper connecting fitting 6y and the lower connecting fitting 6z. Furthermore, three second connecting portions 7D are fixed adjacent to each other at predetermined positions on the beam member 3.

[0036] (Construction procedure 1) Second building component lifting process: The beam component 3 is lifted using a crane or the like and placed in a horizontal position. After that, the beam component 3 is moved to a position where the first connection part 7C fixed to the column component 2 does not interfere with the upper and lower connection fittings 6y and 6z fixed to the beam component 3, and the tip surface of the first connection part 7C and the tip surface of the second connection part 7D are on the same plane and at the same height. (Construction procedure 2) Joint surface alignment process: The beam member 3 is moved horizontally to align the position of the upper first fixed end 4s with the position of the upper insertion hole and the position of the lower first fixed end 4t with the position of the upper insertion hole, and the tip faces of the three first connection portions 7C and the tip faces of the three second connection portions 7D are butted together. (Construction procedure 3) Fixing process of the fixed joint structure: Insert the upper fixing bolt 6m into the upper insertion hole, insert a tightening tool such as a wrench into the hollow portion 6w of the upper joint fitting 6y from the front or back side, rotate the upper fixing bolt 6m, and screw it into the upper first fixed end portion 4s to tighten it. Furthermore, the lower fixing bolt 6n is inserted into the lower insertion hole, and a tightening tool such as a wrench is inserted into the hollow portion 6x of the lower connecting member 6z from the front or rear side to rotate the lower fixing bolt 6n and screw it into the lower first fixed end portion 4t to tighten it. This fixes the upper connecting member 6y to the upper first fixed end portion 4s, and the lower connecting member 6z to the lower first fixed end portion 4t. (Construction procedure 4) Friction joint structure fixing process: The front and back sides (both sides of the first connecting surface and the second connecting surface) of the three first connecting portions 7C and the three second connecting portions 7D, whose tips are butted together, are covered with a pair of metal plates 7m and 7N. Thereafter, three first hexagon bolts 7u are inserted from the front side of one-side clamping member insertion portion 7e and inserted into one-side clamping member insertion portion 7F. Furthermore, three second hexagon bolts 7v are inserted from the front side of the other-side clamping member insertion portion 7g and inserted into the other-side clamping member insertion portion 7H. Then, a nut 7R is threaded onto the tips of the first hexagon bolt 7u and the second hexagon bolt 7v protruding from the back side of the one-side clamping member insertion portion 7F and the other-side clamping member insertion portion 7H, and tightened using a tightening tool such as a wrench. In this way, the three first connecting portions 7C and the three second connecting portions 7D (first connecting opposing surfaces and second connecting opposing surfaces) are sandwiched between the pair of metal plates 7m and 7N. [Example]

[0037] Figure 8 is a diagram illustrating the joining structure of a building component according to Example 5, where Figure 8(A) is a side cross-sectional view of the entire joining structure of a building component according to Example 5, Figure 8(B) is a cross-sectional view of the upper part of the friction joining structure described later, cut along a horizontal plane, and Figure 8(C) is a side view of the triple first connecting portion 8C and the double first connecting portion 8c described later. In the joining structure of the building components according to Example 5, in order to improve the toughness performance and fracture strength of the friction joining structure, the first joining member 7A of Example 4 is replaced with a first joining member 8a consisting of a triple first connecting portion 8C and a double first connecting portion 8c, and is arranged near the center of the first joining surface 2p; the second joining member 7B of Example 4 is replaced with a triple connecting portion 8D and a double connecting portion 8d, and is arranged near the center of the second joining surface 3p; the slits 7x of Example 4 are made into elongated holes 8x; and a groove is provided in the first joining surface 2p, and the double first connecting portion 8c and the triple first connecting portion 8C are fixed to the bottom of the groove. The joining structure of the building component of Example 4 differs only in that a groove is provided on the second joining surface 3p and the two-segment second connecting portion 8d and the three-segment second connecting portion are fixed to the bottom of the groove, that there are two upper second joining holes 5h and an upper second joining hole 5h', an upper base end portion 5q', an upper second fixed end portion 5s' and an upper tough portion 5u' are added, that there are two lower second joining holes 5i and a lower second joining hole 5i', a lower base end portion 5r', a lower second fixed end portion 5t' and a lower tough portion 5v' are added, and that an upper second fixing portion 6u' and a lower second fixing portion 6v' are added. The explanation regarding the upper fixing joint structure of Example 5 simply adds the upper second connecting hole 5h', the upper base end portion 5q', the upper second fixed end portion 5s', the upper tough portion 5u' and the upper second fixed portion 6u' to the above explanations (1) to (3) regarding the upper fixing joint structure of Example 1, and the explanation regarding the lower fixing joint structure of Example 5 simply adds the lower second connecting hole 5i', the lower base end portion 5r', the lower second fixed end portion 5t', the lower tough portion 5v' and the lower second fixed portion 6v' to the above explanations (4) to (6) regarding the lower fixing joint structure of Example 1. Therefore, the description of the upper and lower fixing and joining structures of Example 5 will be omitted, and the friction joining structure of Example 5 will be described in the following (11) to (14). In addition, in Figure 8, which explains Example 5, the same numbers as in Figure 2 are used for all parts except the upper second connecting hole 5h', the upper base end 5q', the upper second fixed end 5s', the upper tough portion 5u', the upper second fixed portion 6u', the lower second connecting hole 5i', the lower base end 5r', the lower second fixed end 5t', the lower tough portion 5v', the lower second fixed portion 6v', and those related to the friction joining structure.

[0038] (11) A first connecting member 8a consisting of seven first screw portions 8s screwed into the first joint surface 2p, a three-piece first connecting portion 8C fixed to the ends of four of the first screw portions 8s, and a two-piece first connecting portion 8c fixed to the ends of three of the first screw portions 8s. The triple first connection portion 8C and the dual first connection portion 8c of Example 5 have five through holes 8w formed therein that penetrate a pair of opposing surfaces (hereinafter referred to as "first connecting opposing surfaces") extending perpendicular to the first joint surface 2p when fixed to the first joint surface 2p, and one first hex bolt 8u can be inserted into each through hole 8w. (12) A second connecting member 8b consisting of seven second screw portions 8t screwed into the second joining surface 3p, a three-part second connecting portion 8D fixed to the ends of four of the second screw portions 8t, and a two-part second connecting portion 8d fixed to the ends of three of the second screw portions 8t. The triple second connection portion 8D and the dual second connection portion 8d of Example 5 have five elongated holes 8x formed therein that penetrate a pair of opposing surfaces (hereinafter referred to as "second connecting opposing surfaces") extending perpendicular to the second joint surface 3p when fixed to the second joint surface 3p, so that one second hex bolt 8v can be passed through each of the elongated holes 8x. (13) The triple first connecting portion 8C and the dual first connecting portion 8c are fixed in grooves dug near the center of the first joining surface 2p, and the triple second connecting portion 8D and the dual second connecting portion 8d are fixed in grooves dug near the center of the second joining surface 3p, and the tips of the triple first connecting portion 8C and the dual second connecting portion 8c are butted against the tips of the triple second connecting portion 8D and the dual second connecting portion 8d. In this state, a pair of triple metal plates 8M, 8N are arranged on both sides of the triple first connecting portion 8C and the triple second connecting portion 8D (on the front and back of the paper in Figure 8(A)) and cover the first and second connecting opposing surfaces, and a pair of dual metal plates 8m, 8n are arranged on both sides of the dual first connecting portion 8c and the dual second connecting portion 8d and cover the first and second connecting opposing surfaces. In the triplet-use metal plates 8M, 8N and the double-use metal plates 8m, 8n of Example 4, first-side clamping member insertion portions 8e, 8f are formed at positions corresponding to the respective through holes 8w, and second-side clamping member insertion portions 8g, 8h are formed at positions corresponding to the second joint surface 3p side of the elongated holes 8x. A first hexagon bolt 8u can pass through the five first-side clamping member insertion portions 8e formed on the triplet-use metal plate 8M and the double-use metal plate 8m and the five first-side clamping member insertion portions 8f formed on the triplet-use metal plate 8N and the double-use metal plate 8n, and a second hexagon bolt 8v can pass through the five second-side clamping member insertion portions 8g formed on the triplet-use metal plate 8M and the double-use metal plate 8m and the five other-side clamping member insertion portions 8n formed on the triplet-use metal plate 8N and the double-use metal plate 8n. (14) Nut 8r threaded onto first hexagon bolt 8u and second hexagon bolt 8v. Three-piece metal plates 8M, 8N and two-piece metal plates 8m, 8n are arranged on both sides of the first connecting opposing surface and the second connecting opposing surface, and nuts 8r are screwed onto the tips of the first hexagonal bolt 8u and the second hexagonal bolt 8v inserted into the one-side clamping member insertion portions 8e, 8f and the other-side clamping member insertion portions 8g, 8h and tightened, thereby clamping and fixing the three-piece first connecting portion 8C and the two-piece first connecting portion 8c, as well as the three-piece second connecting portion 8D and the two-piece second connecting portion 8d. As described above, the triple first connecting portion 8C and the double first connecting portion 8c as well as the triple second connecting portion 8D and the double second connecting portion 8d of Example 5 are fixed to grooves dug near the center of the first joining surface 2p and the second joining surface 3p, respectively, so that the length of the long hole 8x can be increased and the movement distance of the triple second connecting member 8B and the double second connecting member 8b can be sufficiently secured.

[0039] Next, a construction method for joining a column member 2 (first building member) and a beam member 3 (second building member) using a joining structure for building members according to Example 5 will be described. Prior to joining the column member 2 and the beam member 3, the upper first fixing member 4a and the lower first fixing member 4b are fixed in the upper first joining hole 4h and the lower first joining hole 4i, respectively, and the plate portions of the triple first connecting portion 8C and the double first connecting portion 8c are fitted into grooves dug in predetermined positions in the column member 2 and fixed by seven first screw portions 8s. In addition, the upper second fixing ends 5s, 5s' and the lower second fixing ends 5s' are respectively fitted into the upper screw holes of the upper second fixing portions 6u, 6u' and the lower screw holes of the lower second fixing portions 6v, 6v'. After the two fixed ends 5t, 5t' are screwed in, the upper base ends 5q, 5q' and upper ductile portions 5u, 5u' and the lower base ends 5r, 5r' and lower ductile portions 5v, 5v' are fixed into the upper second connecting holes 5h, 5h' and the lower second connecting holes 5i, 5i', respectively, thereby fixing the upper connecting fitting 6y and the lower connecting fitting 6z, and further, the plate portions of the three-piece second connecting portion 8D and the two-piece second connecting portion 8d are fitted into grooves dug at predetermined positions in the beam member 3 and fixed by seven first screw portions 8t.

[0040] (Construction procedure 1) Second building component lifting process: The beam component 3 is lifted using a crane or the like and placed in a horizontal position. After that, the beam component 3 is moved to a position where the triple first connection portion 8C and the double first connection portion 8c fixed to the column component 2 do not interfere with the upper connecting fitting 6y and the lower connecting fitting 6z fixed to the beam component 3, and so that the tip surfaces of the triple first connection portion 8C and the double first connection portion 8c and the tip surfaces of the triple second connection portion 8D and the double second connection portion 8d are on the same plane and at the same height. (Construction procedure 2) Joint surface alignment process: The beam member 3 is moved horizontally to align the position of the upper first fixed end 4s with the position of the upper insertion hole and the position of the lower first fixed end 4t with the position of the upper insertion hole, and the tip faces of the triple first connection portion 8C and the double first connection portion 8c are butted against the tip faces of the triple second connection portion 8D and the double second connection portion 8d. (Construction procedure 3) Fixing process of the fixed joint structure: Insert the upper fixing bolt 6m into the upper insertion hole, insert a tightening tool such as a wrench into the hollow portion 6w of the upper joint fitting 6y from the front or back side, rotate the upper fixing bolt 6m, and screw it into the upper first fixed end portion 4s to tighten it. Furthermore, the lower fixing bolt 6n is inserted into the lower insertion hole, and a tightening tool such as a wrench is inserted into the hollow portion 6x of the lower connecting member 6z from the front or rear side to rotate the lower fixing bolt 6n and screw it into the lower first fixed end portion 4t to tighten it. This fixes the upper connecting member 6y to the upper first fixed end portion 4s, and the lower connecting member 6z to the lower first fixed end portion 4t. (Construction procedure 4) Friction joint structure fixing process: The front and back sides (both sides of the first connecting surface and the second connecting surface) of the triple first connecting portion 8C and the double first connecting portion 8c, and the triple second connecting portion 8D and the double second connecting portion 8d, whose tips are butted together, are covered with a pair of triple metal plates 8M, 8N and a pair of double metal plates 8m, 8n. Thereafter, five first hexagon bolts 8u are inserted from the front side of one-side clamping member insertion portion 8e and into one-side clamping member insertion portion 8f. Furthermore, five second hexagon bolts 8v are inserted from the front side of the other-side clamping member insertion portion 8g and into the other-side clamping member insertion portion 8h. Then, a nut 8r is threaded onto the tips of the first hexagon bolt 8u and the second hexagon bolt 8v protruding from the back side of the one-side clamping member insertion portion 8f and the other-side clamping member insertion portion 8h, and tightened using a tightening tool such as a wrench. In this way, the triple first connection portion 8C and the double first connection portion 8c and the triple second connection portion 8D and the double second connection portion 8d (first connecting opposing surface and second connecting opposing surface) are sandwiched between a pair of triple metal plates 8M, 8N and a pair of double metal plates 8m, 8n.

[0041] Modifications of the joining structure of the building members according to Examples 1 to 5 are listed below. (Variant 1) In Examples 1 and 4, the upper second fixing member 5a has one set of upper second connecting hole 5h, upper base end 5q, upper second fixed end 5s, and upper tough portion 5u, and the lower second fixing member 5b has one set of lower second connecting hole 5i, lower base end 5r, lower second fixed end 5t, and lower tough portion 5v, but as in Examples 2, 3, and 5, two or more sets of upper second connecting holes 5h, etc. or lower second connecting holes 5i, etc. may be provided to improve toughness performance and fracture strength. (Variation 2) In Examples 1 to 5, the upper first fixing portion 6s had an upper through-hole formed in the center of the side surface that comes into surface contact with the first joint surface 2p of the upper connecting fitting 6y, but a groove may be formed that reaches the upper through-hole from the back surface of the upper connecting fitting 6y. Similarly, the lower first fixing portion 6t in Examples 1, 4, and 5 may have a groove that reaches the upper through-hole from the back surface of the lower connecting fitting 6z. When such a groove is formed, the upper fixing bolt 6m and the lower fixing bolt 6n are screwed into the upper first fixing end 4s and the lower first fixing end 4t, respectively, in advance, and in construction procedure 2, the threaded portions of the upper fixing bolt 6m and the lower fixing bolt 6n are inserted into the formed grooves and slid up to the upper insertion hole and the lower insertion hole, thereby aligning the positions of the upper first fixing end 4s and the upper insertion hole and the lower first fixing end 4t and the lower insertion hole. (Modification 3) In the upper second fixing portion 6u in Examples 1 to 5, when the threaded portion of the upper second fixing end portion 5s is screwed into the upper screw hole, the upper connector 6y is fixed to the upper second fixing end portion 5s, and in the lower second fixing portion 6v in Examples 1, 4 and 5, when the threaded portion of the lower second fixing end portion 5t is screwed into the lower screw hole, the lower connector 6z is fixed to the lower second fixing end portion 5t. However, similar to the upper first fixing portion 6s and the lower first fixing portion 6t, the upper connector 6y and the lower connector 6z are provided with insertion holes through which the upper second fixing end portion 5s and the lower second fixing end portion 5t can be inserted, and the upper second fixing end portion 5s and the lower second fixing end portion 5t (upper second fixing end portions 5s, 5s', In Example 5, the upper connecting fitting 6y and the lower connecting fitting 6z may be fixed to the upper second fixed end 5s and the lower second fixed end 5t, respectively, by passing the upper second fixed end 5s, 5s' and the lower second fixed end 5t, 5t' through the nuts and screwing them together to tighten them.

[0042] (Variant 4) In Examples 1 to 3, the first connecting portion 7c is a rectangular column-shaped member having a first connecting opposing surface, and the second connecting portion 7d is a rectangular column-shaped member having a second connecting opposing surface. However, the first connecting portion 7c may be a rectangular column-shaped or U-shaped member having a first connecting opposing surface, and the second connecting portion 7d may be a rectangular column-shaped or U-shaped member having a second connecting opposing surface. (Modification 5) The second connection portion 7d in Examples 1 to 3 and the second connection portion 7D in Example 4 have the slits 7x formed therein. However, they may be elongated holes similar to the elongated holes 8x in Example 5. (Variant 6) In Examples 1 to 3, the first and second connecting opposing surfaces were clamped between a pair of metal plates 7m, 7n by screwing the first hexagonal bolt 7u and the second hexagonal bolt 7v into the threaded portions cut into the one-side clamping member insertion portion 7f and the other-side clamping member insertion portion 7h formed in the metal plate 7n, respectively. However, as in Examples 4 or 5, metal plates without threaded portions may be used, and the first and second connecting opposing surfaces may be clamped between the pair of metal plates by passing the first hexagonal bolt 7u and the second hexagonal bolt 7v through the one-side clamping member insertion portion and the other-side clamping member insertion portion and screwing and tightening nuts. (Variant 7) In Examples 1 to 3, the first connecting member 7a is fixed by screwing the first screw portion 7s into the rectangular column-shaped first connecting portion 7c, and the second connecting member 7b is fixed by screwing the second screw portion 7t into the rectangular column-shaped second connecting portion 7d. In Example 4, the first connecting member 7A is fixed by screwing the first screw portion 7s into the T-shaped first connecting portion 7C, and the second connecting member 7B is fixed by screwing the second screw portion 7t into the T-shaped second connecting portion 7D, but these members may also be integrated. (Variant 8) In Example 5, a triple first connection portion 8C and a double second connection portion 8c, as well as a pair of triple metal plates 8M, 8N and double metal plates 8m, 8n, were used, but by using two triple first connection portions 8C and two double second connection portions 8c, as well as two pairs of triple metal plates 8M, 8N and double metal plates 8m, 8n, the vertical length of the first connection portion and the second connection portion can be adjusted to two, three, four (two doubles), five (two doubles + three), six (two triples), etc., depending on the size of the beam member 3 and the required toughness performance and breaking strength. [Explanation of symbols]

[0043] 1 Floor member (foundation) 2 Pillar member (first building member) 2p First joint surface 3 Beam member (second building member) 3p Second joint surface 4a Upper first fixing member 4b Lower first fixing member 4h Upper first connecting hole 4i Lower first joint hole 4s Upper first fixed end 4t Lower first fixed end 5a Upper second fixing member 5b Lower second fixing member 5h, 5h' Upper second joint hole 5i, 5i' Lower second joint hole 5q, 5q' Upper proximal end 5r, 5r' Lower proximal end 5s, 5s' Upper second fixed end 5t, 5t' Lower second fixed end 5u, 5u' Upper tough part 5v, 5v' Lower tough part 6a Upper connecting member 6b Lower connecting member 6m Upper fixing bolt 6n Lower fixing bolt 6s Upper first fixing part 6t Lower first fixing part 6u Upper second fixing part 6v Lower second fixing part 6w Hollow part 6x Hollow section 6y Upper joint 6z Lower joint 7a, 7a', 7A, 8a: First connecting member 7b, 7b', 7B, 8b: Second connecting member 7c, 7c' Prismatic first connection part 7C T-shaped first connection part 7d, 7d' Prismatic second connection part 7D T-shaped second connection part 7e, 7f, 7F, 8e, 8f One-side clamping member insertion portion 7g, 7h, 7H, 8g, 8h Other side clamping member insertion portion 7m, 7m', 7n, 7N Metal plate 7R, 8r Nut 7s, 7s', 8s First screw part 7t, 7t', 8t Second screw part 7u, 7u', 8u 1st hex bolt 7v, 7v', 8v 2nd hex bolt 7w, 8w through hole 7x slit 8c Two-series first connection part 8C Three-series first connection part 8d Two-series second connection part 8D Triple second connection part 8m, 8n Double metal plate 8M, 8N Triple Metal Plate with 8 Slots

Claims

1. a first fixing member that is fixed to a first connecting hole formed on a first connecting surface, which is a connecting surface of the first building component, by the adhesive action of an adhesive, and has a first fixing end on the first connecting surface side; a second fixing member that is fixed to a second joining hole formed on a second joining surface, which is a joining surface of the second building component, by the adhesive action of an adhesive, and has a second fixing end on the second joining surface side; a joining member having a first fixing portion fixed to the first fixed end portion and a second fixing portion fixed to the second fixed end portion, a first connecting member fixed to the first joint surface and having a pair of first connecting opposing surfaces extending perpendicular to the first joint surface; a second connecting member fixed to the second joint surface and having a pair of second connecting opposing surfaces extending perpendicular to the second joint surface; a pair of metal plates disposed on both sides of the first connecting opposing surface and the second connecting opposing surface; a friction joining structure including a first clamping member and a second clamping member that clamp the first connecting opposing surface and the second connecting opposing surface between the pair of metal plates, a through hole penetrating the first coupling opposing surface or the second coupling opposing surface is formed in one of the first coupling member and the second coupling member, and an elongated hole or a slit penetrating the first coupling opposing surface or the second coupling opposing surface is formed in the other of the first coupling member and the second coupling member, a first clamping member insertion portion is formed at a position corresponding to the through hole of the pair of metal plates; a second clamping member insertion portion is formed at a position corresponding to the joining surface side of the elongated hole or the slit of the pair of metal plates, the one-side clamping member is inserted through the through hole and the one-side clamping member insertion portion, so that one of the first connecting member and the second connecting member can be clamped between the pair of metal plates, The other clamping member is inserted through the elongated hole or the slit and the other clamping member insertion portion, so that the other of the first connecting member and the second connecting member can be clamped between the pair of metal plates. A joining structure for building components.

2. The fixing and joining structure is provided between the first joining surface and the second joining surface near one end thereof, the fixing and joining structure is provided between the first joining surface and the vicinity of the other end of the second joining surface, The friction welding structure is provided between the first welding surface and the second welding surface near the center. The joining structure of building members according to claim 1.

3. The friction joining structure is provided between the first joining surface and the second joining surface near one end thereof, The friction joining structure is provided between the first joining surface and the vicinity of the other end of the second joining surface, The fixing and joining structure is provided between the first joining surface and the second joining surface near the center thereof. The joining structure of building members according to claim 1.

4. The friction-welding structure includes a plurality of pairs of the first connecting member and the second connecting member, and the pair of metal plates are disposed on both sides of the plurality of pairs of the first connecting opposing surfaces and the second connecting opposing surfaces.

4. The joining structure of building members according to claim 1.

5. the first connecting member includes a first threaded portion that is screwed into the first joint surface and a rectangular column-shaped, rectangular tube-shaped, or U-shaped member that is fixed to an end of the first threaded portion, the second connecting member includes a second threaded portion that is screwed into the second joining surface and a rectangular column-shaped, rectangular tube-shaped, or U-shaped member that is fixed to an end of the second threaded portion, The pair of metal plates are disposed on both outer sides of the first connecting opposing surface and the second connecting opposing surface.

4. The joining structure of building members according to claim 1.

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