Coupling metal fitting and building

Abstract

This coupling metal fitting (100) comprises: a first metal fitting that is attached to a coupling target surface (21) and is attached to an end part of a first shaft member (30); and a second metal fitting that is attached to an end part of a second shaft member (40) and is coupled to the first metal fitting. The first metal fitting has a first fixing part fixed to a coupling target part (20), a second fixing part fixed to the end part of the first shaft member (30), and a first coupling part coupled to the second metal fitting. The first fixing part has a first support plate having a first surface in contact with the coupling target surface (21), and a second surface at least a part of which faces an end surface of the first shaft member (30) and which is on the opposite side from the first surface. The second fixing part and the first coupling part are provided on the second surface.

Description

Coupling fitting and building

[0001] The present disclosure relates to a coupling fitting and a building.

[0002] There is known a coupling fitting that couples an end portion of a shaft member disposed obliquely with respect to a horizontal member such as a beam to the horizontal member. In Patent Document 1, a cross-member connecting member that supports a cross-member is connected to a fixture installed at a corner formed by a column and a horizontal member. The fixture is fixed to the side surface of the column and the side surface of the horizontal member.

[0003] Utility Model Registration No. 3066723

[0004] By the way, from the viewpoint of the design property of a building, it is preferable that the coupling fitting is not conspicuous at the coupling portion of the shaft member.

[0005] (1) A coupling fitting according to one aspect of the present disclosure is a coupling fitting that couples a first shaft member disposed along a second direction intersecting the first direction to a coupling target surface extending along the first direction of a coupling target portion, the first shaft member, and the coupling target surface, and the second shaft member disposed obliquely with respect to both the first shaft member and the coupling target surface. The coupling fitting includes a first fitting attached to the coupling target surface and attached to an end portion of the first shaft member, and a second fitting attached to an end portion of the second shaft member and coupled to the first fitting. The first fitting has a first fixing portion fixed to the coupling target portion, a second fixing portion fixed to an end portion of the first shaft member, and a first coupling portion coupled to the second fitting. The first fixing portion has a first support plate having a first surface that contacts the coupling target surface, and a second surface at least a part of which faces an end surface of the first shaft member and is on the opposite side of the first surface. The second fixing portion and the first coupling portion are provided on the second surface.

[0006] In this configuration, the first surface of the first support plate contacts the surface to be joined, and at least a portion of the second surface faces the end face of the first shaft member. Therefore, at least a portion of the first support plate is positioned between the surface to be joined and the end face of the first shaft member. Compared to the case where at least a portion of the first support plate is not positioned between the surface to be joined and the end face of the first shaft member, the first support plate is less visible, making the connecting fitting less conspicuous at the joint between the part to be joined, the first shaft member, and the second shaft member.

[0007] (2) In the coupling fitting described in (1) above, the coupling target surface is provided with a first hole, the coupling target portion is provided with a first through hole intersecting the first hole, and the first fixing portion has a pole that is inserted into the first hole and has a first fixing hole, and with the pole inserted through the first hole, the first fixing shaft member passes through the first through hole and the first fixing hole. With this configuration, the first fitting can be attached to the coupling target surface by the first fixing shaft member.

[0008] (3) In the coupling fitting described in (1) above, an anchor bolt is provided on the surface to be coupled, a second hole is provided in the first support plate through which the anchor bolt is inserted, and the first fixing part is fixed to the surface to be coupled by fastening a nut to the anchor bolt while the anchor bolt is inserted through the second hole. With this configuration, the first fitting can be attached to the surface to be coupled by the anchor bolt.

[0009] (4) In the coupling fitting described in any one of (1) to (3) above, the second fitting has a third fixing portion fixed to the end of the second shaft member and a second coupling portion connected to the third fixing portion and coupled to the first coupling portion of the first fitting, the first coupling portion has a first coupling plate provided with a first coupling hole, and the second coupling portion has a second coupling plate provided with a second coupling hole, and the coupling shaft member passes through the first coupling hole and the second coupling hole. With this configuration, the second fitting can be coupled to the first fitting by the coupling shaft member.

[0010] (5) In the coupling fitting described in (4) above, the outer edge of the first coupling plate has a first outer edge portion and a second outer edge portion, the outer edge of the second coupling plate has a third outer edge portion and a fourth outer edge portion, in a front view of the first fitting, the first angle formed by a first imaginary line along the first outer edge portion and a second imaginary line along the second outer edge portion is less than 90°, and in a front view of the second fitting, the second angle formed by a third imaginary line along the third outer edge portion and a fourth imaginary line along the fourth outer edge portion is less than 90°.

[0011] With this configuration, the first angle formed by the first outer edge and the second outer edge becomes acute, and the second angle formed by the third outer edge and the fourth outer edge also becomes acute. By configuring it in this way, the joint between the first fitting and the second fitting becomes less conspicuous, thereby improving the aesthetic appearance of the joint between the part to be joined and the first shaft member and the second shaft member.

[0012] (6) In the coupling fitting described in any one of (1) to (5) above, a first slit is provided on the end face of the first shaft member, a second through hole intersecting the first slit is provided in the first shaft member, the second fixing part has a first fixing plate that is inserted into the first slit and has a second fixing hole, and with the first fixing plate inserted through the first slit, the second fixing shaft member passes through the second through hole and the second fixing hole. With this configuration, the first fitting can be attached to the end of the first shaft member by the second fixing shaft member.

[0013] (7) In the coupling fitting described in any one of (1) to (6) above, the second fitting is rotatably coupled to the first fitting. With this configuration, since the second fitting is rotatable relative to the first fitting, the second shaft member can rotate relative to the surface to be coupled. As a result, the second shaft member can be attached to the surface to be coupled at any angle.

[0014] (8) A building according to one aspect of the present disclosure is a building comprising a frame, the frame comprising: a connecting portion having a connecting surface extending along a first direction; a first axial member arranged along a second direction intersecting the first direction; a second axial member arranged diagonally with respect to both the connecting surface and the first axial member; and a connecting fitting described in any one of (1) to (7) above, wherein the end of the first axial member and the end of the second axial member are connected to the connecting surface by the connecting fitting. With this configuration, the connecting fitting is less conspicuous at the connection between the connecting portion, the first axial member and the second axial member, thereby improving the aesthetic design of the building.

[0015] According to the connecting fittings and buildings of this disclosure, the connecting fittings can be made less conspicuous at the connection point between the part to be connected and the first shaft member and the second shaft member.

[0016] This is a schematic diagram of a building according to an embodiment. This is an exploded perspective view of the first connecting fitting in Figure 1. This is a front view of the first fitting of the first connecting fitting in Figure 1. This is a front view of the second fitting of the first connecting fitting in Figure 1. This is a cross-sectional view of the connecting portion along the line D5-D5 in the building in Figure 1. This is a cross-sectional view of the connecting portion along the line D6-D6 in the building in Figure 1. This is an exploded perspective view of the second connecting fitting in Figure 1. This is a cross-sectional view of the connecting portion along the line D8-D8 in the building in Figure 1. This is a schematic diagram of a building according to a modified example.

[0017] <Embodiment> The building 1 and connecting fittings 100 according to the embodiment will be described with reference to Figures 1 to 8. <Building> The building 1 is, for example, a detached house, an apartment building, a commercial facility, and a public facility. In this embodiment, the building 1 will be described as a commercial facility. In the following description, the first direction A1 is the direction along the ground. In this embodiment, the first direction A1 is the direction along the horizontal. The second direction A2 intersects the first direction A1 and is the direction along the vertical direction.

[0018] As shown in Figure 1, building 1 comprises a structural frame 2. The structural frame 2 is the framework of building 1. The structural frame 2 is built on the foundation 3 of building 1. The structural frame 2 is composed of axial members. The axial members include horizontal members, columns, and braces. The horizontal members include beams, girders, and sills.

[0019] The structural frame 2 comprises beams 10, columns 11, braces 12, and connecting fittings 100. The beams 10 are arranged along the first direction A1. In the structural frame 2, the beams 10, columns 11, and braces 12 are made of, for example, wood. The beams 10, columns 11, and braces 12 may be made of laminated timber or solid wood. The connecting fittings 100 are made of, for example, metal.

[0020] Column 11 is positioned along the second direction A2. The upper end of column 11 is connected to beam 10. The lower end of column 11 is connected to foundation 3. In this embodiment, the structure 2 includes a first column 13 and a second column 14 as columns 11. The first column 13 is positioned away from the second column 14 in the first direction A1.

[0021] The brace 12 is positioned diagonally to both the beam 10 and the column 11. The brace 12 is positioned to intersect diagonally with both the first direction A1 and the second direction A2 in a front view of the building structure 2. Figure 1 shows a front view of the building structure 2. In the example in Figure 1, the brace 12 is positioned diagonally from near the lower end of the first column 13 towards near the upper end of the second column 14. The beam 10, column 11, and brace 12 constitute a load-bearing wall in the wall 4 of the building 1. The wall 4 is, for example, the exterior wall of the building 1.

[0022] The structural frame 2 includes a first connecting fitting 101 and a second connecting fitting 102 as connecting fittings 100. In the example shown in Figure 1, the first connecting fitting 101 connects the upper end of the second column 14 and the upper end of the brace 12 to the lower surface 15 of the beam 10. The second connecting fitting 102 connects the lower end of the first column 13 and the lower end of the brace 12 to the upper surface 5 of the foundation 3. The first connecting fitting 101 and the second connecting fitting 102 differ in the configuration of the first fixing part 111, which will be described later. When the first connecting fitting 101 and the second connecting fitting 102 are not distinguished, they will be collectively referred to as the connecting fitting 100 below.

[0023] In this embodiment, the structural frame 2 has an exposed structure in which a part of the structural frame 2 is exposed. In the example of Figure 1, at least the brace 12 is exposed. Here, "exposed" means that it is not covered by exterior materials, interior materials, etc. In the example of Figure 1, the beam 10 and column 11 are also exposed. In the example of Figure 1, the joint between the upper end of the brace 12 and the lower surface 15 of the beam 10 is also exposed. In addition, the joint between the lower end of the brace 12 and the upper surface 5 of the foundation 3 is also exposed. A part of the connecting fitting 100 is also exposed. Note that if the brace 12 is exposed, the beam 10 and column 11 may be provided inside the wall 4.

[0024] In the first direction A1, an opening is provided between the column 11 and the brace 12. The exposed structure allows the texture of the brace 12 to be expressed, thereby improving the design of the building 1. For example, if the exposed part of the frame 2 is made of wood, a warm-looking space can be created.

[0025] <Connecting Hardware> As shown in Figure 1, the connecting hardware 100 is a metal fitting for connecting the first shaft member 30 and the second shaft member 40 to the connecting surface 21 of the connecting part 20. The connecting part 20 is, for example, a part of a building 1 such as the frame 2 or foundation 3. The connecting surface 21 extends along the first direction A1. The first shaft member 30 is positioned along the second direction A2. The second shaft member 40 is positioned diagonally with respect to both the connecting surface 21 and the first shaft member 30. In other words, the second shaft member 40 is positioned diagonally with respect to both the first direction A1 and the second direction A2. The first shaft member 30 and the second shaft member 40 are made of, for example, wood. Below, the first connecting hardware 101 will be described first as an example of the connecting hardware 100. The structural frame 2 includes, for example, a connection target portion 20, a first shaft member 30, a second shaft member 40, and a first connecting fitting 101.

[0026] [First coupling fitting] As shown in Figure 2, the end of the first shaft member 30 and the end of the second shaft member 40 are coupled to the coupling surface 21 of the coupling target part 20 by the first coupling fitting 101. In the first coupling fitting 101, the coupling target part 20 is the beam 10. The coupling target surface 21 is the lower surface 15 of the beam 10. A first hole 22 is provided in the coupling target surface 21. Two first holes 22 are provided in the coupling target surface 21. A first through hole 23 is provided in the coupling target part 20. The first through hole 23 is provided on the side surface of the coupling target part 20 that intersects with the coupling target surface 21. In the example in Figure 2, the first through hole 23 is provided on the side surface of the beam 10. The first through hole 23 intersects with the first hole 22 inside the coupling target part 20.

[0027] The first shaft member 30 is the second column 14. A first slit 32 is provided on the end face 31 of the first shaft member 30. A second through hole 33 is provided in the first shaft member 30. The second through hole 33 is provided on the side surface of the first shaft member 30 that intersects with the end face 31. The second through hole 33 intersects with the first slit 32 inside the first shaft member 30.

[0028] The second shaft member 40 is a brace 12. A second slit 42 is provided on the end face 41 of the second shaft member 40. Two second slits 42 are provided on the end face 41 of the second shaft member 40. A third through hole 43 is provided in the second shaft member 40. The third through hole 43 is provided on the side surface of the second shaft member 40 that intersects with the end face 41. The third through hole 43 intersects with the second slit 42 inside the second shaft member 40.

[0029] The first coupling fitting 101 comprises a first fitting 110 and a second fitting 120. The first fitting 110 is a single piece of metal. The first fitting 110 is attached to the coupling surface 21. The first fitting 110 is attached to the end of the first shaft member 30. The second fitting 120 is a single piece of metal. The second fitting 120 is attached to the end of the second shaft member 40. The second fitting 120 is coupled to the first fitting 110.

[0030] <First Fitting> As shown in Figure 2, the first fitting 110 has a first fixing portion 111, a second fixing portion 112, and a first connecting portion 113. The first fixing portion 111 is fixed to the connecting target portion 20. The second fixing portion 112 and the first connecting portion 113 are connected to the first fixing portion 111. The second fixing portion 112 is fixed to the end of the first shaft member 30. The first connecting portion 113 is connected to the second fitting 120.

[0031] The first fixing portion 111 has a first support plate 114. The first fixing portion 111 further has a pole 115. As shown in Figure 3, the first support plate 114 of the first fixing portion 111 has a first surface 114A and a second surface 114B. The first surface 114A is in contact with the coupling surface 21 (see Figure 2). The second surface 114B is on the opposite side from the first surface 114A. At least a portion of the second surface 114B faces the end surface 31 of the first shaft member 30 (see Figure 2). At least a portion of the second surface 114B may be in contact with the end surface 31 of the first shaft member 30. The second fixing portion 112 and the first coupling portion 113 are provided on the second surface 114B of the first support plate 114.

[0032] The pole 115 of the first fixing part 111 is, for example, a mortise pipe. The pole 115 is fixed to the first surface 114A of the first support plate 114 by welding or brazing. The pole 115 is provided with a first fixing hole 115A. The pole 115 is inserted into the first hole 22 of the surface to be joined 21 (see Figure 2). With the pole 115 inserted through the first hole 22, the first through hole 23 and the first fixing hole 115A overlap.

[0033] The first fixing portion 111 has a pole 115, which consists of a first pole 115X and a second pole 115Y. The first pole 115X overlaps with the second fixing portion 112 in the thickness direction X1 of the first support plate 114. The second pole 115Y is positioned away from the first pole 115X in the intersecting direction X2, which intersects the thickness direction X1 in a front view of the first fitting 110. In the intersecting direction X2, the first connecting portion 113 is located between the first pole 115X and the second pole 115Y. A first fixing hole 115A is provided in each of the first pole 115X and the second pole 115Y.

[0034] The second fixing portion 112 has a first fixing plate 116. The first fixing plate 116 is fixed to the second surface 114B of the first support plate 114, for example, by welding or brazing. The first fixing plate 116 extends, for example, along the intersecting direction X2. The first fixing plate 116 is provided with a second fixing hole 116A. The first fixing plate 116 is inserted into the first slit 32 of the first shaft member 30 (see Figure 2). With the first fixing plate 116 inserted through the first slit 32, the second fixing hole 116A of the first fixing plate 116 and the second through hole 33 of the first shaft member 30 overlap.

[0035] The first connecting portion 113 has a first connecting plate 117. The first connecting plate 117 is fixed to the second surface 114B of the first support plate 114 by welding or brazing. The first connecting plate 117 is provided with a first connecting hole 117A. The first connecting plate 117 connects with the second connecting plate 125 of the second fitting 120, which will be described later (see Figure 4).

[0036] The outer edge of the first connecting plate 117 has a first outer edge portion 118A and a second outer edge portion 118B. The first outer edge portion 118A and the second outer edge portion 118B are the straight-line portions of the outer edge of the first connecting plate 117. The first outer edge portion 118A and the second outer edge portion 118B are connected by a first arc-shaped outer edge portion 118C of the outer edge of the first connecting plate 117. The first arc-shaped outer edge portion 118C is an arc-shaped portion located at the tip of the first connecting plate 117. In a front view of the first fitting 110, the first outer edge portion 118A and the second outer edge portion 118B get closer to each other as they move away from the first support plate 114.

[0037] In a front view of the first fitting 110, the first angle D1 formed by the first imaginary line RL1 along the first outer edge 118A and the second imaginary line RL2 along the second outer edge 118B is less than 90°. <Second fitting> As shown in Figure 2, the second fitting 120 has a third fixing part 121 and a second connecting part 122. The third fixing part 121 is fixed to the end of the second shaft member 40. The second connecting part 122 is connected to the third fixing part 121. The second connecting part 122 is connected to the first connecting part 113 of the first fitting 110.

[0038] The third fixing portion 121 has a second support plate 123. The third fixing portion 121 further has a second fixing plate 124. As shown in Figure 4, the second support plate 123 of the third fixing portion 121 has a third surface 123A and a fourth surface 123B. The third surface 123A faces the end face 41 of the second shaft member 40 (see Figure 2). The third surface 123A may be in contact with the end face 41 of the second shaft member 40. The fourth surface 123B is on the opposite side from the third surface 123A.

[0039] The second fixing plate 124 of the third fixing portion 121 is fixed to the third surface 123A of the second support plate 123, for example, by welding or brazing. The second fixing plate 124 is provided with a third fixing hole 124A. The second fixing plate 124 of the third fixing portion 121 is inserted into the second slit 42 of the second shaft member 40 (see Figure 2). With the second fixing plate 124 inserted through the second slit 42 of the second shaft member 40, the third fixing hole 124A of the second fixing plate 124 and the third through hole 43 of the second shaft member 40 overlap.

[0040] As shown in Figure 2, the third fixing portion 121 has two second fixing plates 124. The two second fixing plates 124 are the same shape as each other. As shown in Figure 4, the second connecting portion 122 connects to the third fixing portion 121. The second connecting portion 122 has a second connecting plate 125. The second connecting plate 125 is fixed to the fourth surface 123B of the second support plate 123 by welding or brazing. The second connecting plate 125 is provided with a second connecting hole 125A. When the second connecting portion 122 is connected to the first connecting portion 113 of the first fitting 110, the second connecting hole 125A of the second connecting plate 125 overlaps with the first connecting hole 117A of the first connecting plate 117 (see Figure 3).

[0041] As shown in FIG. 2, the second coupling portion 122 has two second coupling plates 125. The two second coupling plates 125 have the same shape as each other. As shown in FIG. 4, the outer edge of the second coupling plate 125 has a third outer edge portion 126A and a fourth outer edge portion 126B. The third outer edge portion 126A and the fourth outer edge portion 126B are portions formed by straight lines on the outer edge of the second coupling plate 125. The third outer edge portion 126A and the fourth outer edge portion 126B are connected by a second arcuate outer edge portion 126C of the outer edge of the second coupling plate 125. The second arcuate outer edge portion 126C is an arcuate portion located at the tip of the second coupling plate 125. In a front view of the second fitting 120, the third outer edge portion 126A and the fourth outer edge portion 126B approach each other as they move away from the second support plate 123.

[0042] In a front view of the second fitting 120, a second angle D2 formed by a third virtual line RL3 along the third outer edge portion 126A and a fourth virtual line RL4 along the fourth outer edge portion 126B is smaller than 90°. The second angle D2 is, for example, the same as the first angle D1.

[0043] Referring to FIGS. 5 and 6, the fixing structure or coupling structure of the coupling target portion 20, the first shaft member 30, the second shaft member 40, the first fitting 110, and the second fitting 120 will be described. As shown in FIG. 5, with the pole 115 of the first fixing portion 111 inserted into the first hole 22, the first fixing shaft member 310 passes through the first through hole 23 of the coupling target portion 20 and the first fixing hole 115A of the pole 115 of the first fitting 110. The first fixing shaft member 310 is, for example, a drift pin. Thereby, the first fixing portion 111 of the first fitting 110 is fixed to the coupling target portion 20.

[0044] As shown in FIG. 5, with the first fixing plate 116 of the second fixing portion 112 inserted into the first slit 32 of the first shaft member 30, the second fixing shaft member 320 passes through the second through hole 33 of the first shaft member 30 and the second fixing hole 116A of the first fixing plate 116 of the first fitting 110 (see FIG. 3). The second fixing shaft member 320 is, for example, a drift pin. Thereby, the second fixing portion 112 of the first fitting 110 is fixed to the first shaft member 30.

[0045] As shown in FIG. 6, with the second fixing plate 124 of the third fixing portion 121 inserted into the second slit 42 of the second shaft member 40, the third fixing shaft member 330 is inserted through the third through-hole 43 of the second shaft member 40 and the third fixing hole 124A of the second fixing plate 124 of the second fitting 120 (see FIG. 4). The third fixing shaft member 330 is, for example, a drift pin. Thereby, the third fixing portion 121 of the second fitting 120 is fixed to the second shaft member 40.

[0046] As shown in FIG. 6, the coupling shaft member 340 is inserted through the first coupling hole 117A of the first coupling plate 117 of the first fitting 110 and the second coupling hole 125A of the second coupling plate 125 of the second fitting 120 (see FIGS. 3 and 4). In the present embodiment, with the first coupling plate 117 sandwiched between two second coupling plates 125, the coupling shaft member 340 is inserted through the first coupling hole 117A of the first coupling plate 117 and the second coupling holes 125A of the two second coupling plates 125. The coupling shaft member 340 is, for example, a bolt 341. The shaft portion of the bolt 341 is inserted through the first coupling hole 117A and the second coupling hole 125A. By fastening the bolt 341, which is the coupling shaft member 340, and the nut 342, the second fitting 120 is coupled to the first fitting 110.

[0047] The second fitting 120 is coupled to the first fitting 110 so as to be rotatable with respect to the first fitting 110. The second fitting 120 rotates on a plane along both the first direction A1 and the second direction A2 with the coupling shaft member 340 as a fulcrum with respect to the first fitting 110 (see FIG. 1). So that the second fitting 120 can rotate with respect to the first fitting 110, the first coupling portion 113 is arranged offset in the crossing direction X2 from the second fixing portion 112 (see FIG. 3).

[0048] In one example, the second fitting 120 rotates with respect to the first fitting 110 within a range where the second shaft member 40 does not contact the first shaft member 30. When the second fitting 120 rotates with respect to the first fitting 110, the second shaft member 40 rotates with respect to the coupling target portion 20 and the first shaft member 30. Thereby, for example, when the beam 10, which is the coupling target portion 20, moves with respect to the foundation 3, the function of the second shaft member 40 as a shear wall structure of the cross brace 12 is exhibited.

[0049] [Second Connector] Next, with reference to Figures 7 and 8, the second connector 102 will be described as an example of the connector 100. Components common to the first connector 101 will be given the same reference numerals and their descriptions will be omitted.

[0050] As shown in Figure 7, in the second connecting fitting 102, the part to be connected 20 is the foundation 3. The surface to be connected 21 is the upper surface 5 of the foundation 3. In the second connecting fitting 102, the first shaft member 30 is the first column 13. The configuration of the first fixing part 111 that is fixed to the part to be connected 20 in the second connecting fitting 102 differs from that of the first connecting fitting 101.

[0051] The first fixing portion 111X of the second connecting fitting 102 includes a second hole 119 instead of a pole 115. The second hole 119 is provided in the first support plate 114X. A fixing member 350 is inserted through the second hole 119. The fixing member 350 is, for example, an anchor bolt 351 protruding from the foundation 3. The anchor bolt 351 is provided on the surface to be connected 21. The anchor bolt 351 is inserted through the second hole 119. Note that in Figure 7, the nut 352, which will be described later, is omitted.

[0052] As shown in Figure 8, the first fixing part 111X is fixed to the connecting part 20 by fastening a nut 352 to the anchor bolt 351 with the anchor bolt 351 inserted through the second hole 119. In this way, the first fitting 110X is fixed to the connecting part 20. A spacer 130 is provided between the end face 31 of the first shaft member 30 and the first support plate 114X. The spacer 130 is positioned on the second surface 114B of the first support plate 114X so as to suppress contact between the end face 31 of the first shaft member 30 and the protruding part of the anchor bolt 351, which is the fixing member 350.

[0053] <Operation of this Embodiment> The first operation of this embodiment will now be described. As a structure for joining multiple shaft members, a joining structure is known in which a single plate is screwed to each of the multiple shaft members. The single plate is attached, for example, to each of the multiple shaft members' sides. On the other hand, when using a conventional joining structure that uses a single plate in an exposed structure, the plate attached to the side of the shaft member is conspicuous, which may reduce the aesthetic appeal of the building 1. In the joining structure using the joining fitting 100, the portion of the metal fitting that is exposed is smaller than in the conventional joining structure in which the plate is attached to the side of the shaft member, so even when the joining fitting 100 is used in an exposed structure, the joining fitting 100 is less conspicuous.

[0054] The second function of this embodiment will now be described. When connecting a shaft member that is inclined at an angle with respect to the surface to be connected 21, such as the second shaft member 40, to the part to be connected 20, one possible method is to cut the end of the shaft member at an angle and bring the cut surface into contact with the surface to be connected 21. In this respect, the connecting fitting 100 allows a shaft member that is inclined at an angle to be connected to the surface to be connected 21 without making such an angled cut. For this reason, the connecting structure using the connecting fitting 100 has higher workability for connecting multiple shaft members compared to conventional connecting structures using angled cuts.

[0055] <Effects of this embodiment> The effects of this embodiment will now be described. (1) The coupling fitting 100 is a metal fitting for coupling a first shaft member 30 and a second shaft member 40 to the coupling target surface 21 of the coupling target part 20. The coupling target surface 21 extends along a first direction A1. The first shaft member 30 is arranged along a second direction A2. The second direction A2 intersects with the first direction A1. The second shaft member 40 is arranged diagonally with respect to both the coupling target surface 21 and the first shaft member 30. The coupling fitting 100 includes a first fitting 110 that is attached to the coupling target surface 21 and to the end of the first shaft member 30, and a second fitting 120 that is attached to the end of the second shaft member 40 and coupled to the first fitting 110. The first fitting 110 has a first fixing portion 111 fixed to the surface to be joined 21, a second fixing portion 112 fixed to the end face 31 of the first shaft member 30, and a first connecting portion 113 that connects with the second fitting 120. The first fixing portion 111 has a first support plate 114. The first support plate 114 has a first surface 114A that contacts the surface to be joined 21, and a second surface 114B that faces the end face 31 of the first shaft member 30 and is opposite to the first surface 114A. The second fixing portion 112 and the first connecting portion 113 are provided on the second surface 114B.

[0056] In this configuration, the first surface 114A of the first support plate 114 contacts the surface to be joined 21, and at least a portion of the second surface 114B faces the end surface 31 of the first shaft member 30. Therefore, at least a portion of the first support plate 114 is positioned between the surface to be joined 21 and the end surface 31 of the first shaft member 30. Compared to the case where at least a portion of the first support plate 114 is not positioned between the surface to be joined 21 and the end surface 31 of the first shaft member 30, the first support plate 114 is less visible, making the connecting fitting 100 less conspicuous at the joint between the part to be joined 20, the first shaft member 30, and the second shaft member 40.

[0057] (2) A first hole 22 is provided in the surface to be joined 21. A first through hole 23 intersecting the first hole 22 is provided in the part to be joined 20. The first fixing part 111 has a pole 115 which is inserted into the first hole 22 and has a first fixing hole 115A. With the pole 115 inserted through the first hole 22, the first fixing shaft member 310 is inserted through the first through hole 23 and the first fixing hole 115A. With this configuration, the first fitting 110 can be attached to the surface to be joined 21 by the first fixing shaft member 310.

[0058] (3) An anchor bolt 351 is provided on the surface to be joined 21. The first support plate 114 is provided with a second hole 119 through which the anchor bolt 351 is inserted. With the anchor bolt 351 inserted through the second hole 119, the first fixing part 111 is fixed to the surface to be joined 20 by fastening a nut 352 to the anchor bolt 351. With this configuration, the first fitting 110 can be attached to the surface to be joined 21 by the anchor bolt 351.

[0059] (4) The second fitting 120 has a third fixing portion 121 fixed to the end of the second shaft member 40, and a second connecting portion 122 connected to the third fixing portion 121 and connected to the first connecting portion 113 of the first fitting 110. The first connecting portion 113 has a first connecting plate 117 provided with a first connecting hole 117A. The second connecting portion 122 has a second connecting plate 125 provided with a second connecting hole 125A. The connecting shaft member 340 passes through the first connecting hole 117A and the second connecting hole 125A. With this configuration, the second fitting 120 can be connected to the first fitting 110 by the connecting shaft member 340.

[0060] (5) The outer edge of the first connecting plate 117 has a first outer edge portion 118A and a second outer edge portion 118B. The outer edge of the second connecting plate 125 has a third outer edge portion 126A and a fourth outer edge portion 126B. In a front view of the first fitting 110, the first angle D1 formed by the first imaginary line RL1 along the first outer edge portion 118A and the second imaginary line RL2 along the second outer edge portion 118B is less than 90°. In a front view of the second fitting 120, the second angle D2 formed by the third imaginary line RL3 along the third outer edge portion 126A and the fourth imaginary line RL4 along the fourth outer edge portion 126B is less than 90°.

[0061] With this configuration, the first angle D1 formed by the first outer edge portion 118A and the second outer edge portion 118B becomes acute, and the second angle D2 formed by the third outer edge portion 126A and the fourth outer edge portion 126B also becomes acute. By configuring it in this way, the joint between the first fitting 110 and the second fitting 120 becomes less conspicuous, thereby improving the aesthetic appearance of the joint between the joint target portion 20 and the first shaft member 30 and the second shaft member 40.

[0062] (6) A first slit 32 is provided on the end face 31 of the first shaft member 30. A second through hole 33 intersects with the first slit 32 in the first shaft member 30. The second fixing part 112 has a first fixing plate 116 which is inserted into the first slit 32 and has a second fixing hole 116A. With the first fixing plate 116 inserted through the first slit 32, the second fixing shaft member 320 is inserted through the second through hole 33 and the second fixing hole 116A. With this configuration, the first fitting 110 can be attached to the end of the first shaft member 30 by the second fixing shaft member 320.

[0063] (7) The second fitting 120 is rotatably connected to the first fitting 110. With this configuration, since the second fitting 120 is rotatable relative to the first fitting 110, the second shaft member 40 can rotate relative to the part to be connected 20. As a result, the second shaft member 40 can be attached to the surface to be connected 21 at any angle.

[0064] (8) The building 1 comprises a frame 2. The frame 2 comprises a connecting portion 20 having a connecting surface 21, a first shaft member 30, a second shaft member 40, and a connecting fitting 100. The end of the first shaft member 30 and the end of the second shaft member 40 are connected to the connecting surface 21 by the connecting fitting 100. With this configuration, the connecting fitting 100 is less conspicuous at the connection between the connecting portion 20, the first shaft member 30, and the second shaft member 40, thus improving the aesthetic design of the building 1.

[0065] <Modifications> The above embodiment is an example of possible forms for the building 1 and the connecting fitting 100, and is not intended to limit their form. The building 1 and the connecting fitting 100 may take forms different from those exemplified in the above embodiment. Examples include forms in which some of the configurations of the embodiment are replaced, modified, or omitted, or forms in which new configurations are added to the embodiment. Modifications of the embodiment are shown below.

[0066] As shown in Figure 9, the connecting fitting 100 may be provided in the truss structure. In the example in Figure 9, the building 1 comprises two third axis members 50 arranged parallel to each other, and a fourth axis member 60 arranged between the two third axis members 50 so as to intersect with the third axis members 50. A plurality of fifth axis members 70 are provided between the two third axis members 50. Each of the plurality of fifth axis members 70 is arranged diagonally with respect to the third axis members 50 and the fourth axis members 60. In this modified example, the third axis member 50 is the part to be connected 20. The fourth axis member 60 is the first axis member 30. The fifth axis member 70 that is arranged next to the fourth axis member 60 is the second axis member 40. The first connecting fitting 101 as the connecting fitting 100 is used at the connection between the end of the third axis member 50 and the end of the fourth axis member 60 and the end of the fifth axis member 70. The truss structure in Figure 9 may be used as a three-dimensional truss structure in which two third axis members 50 are aligned vertically, or as a planar truss structure in which two third axis members 50 are aligned horizontally.

[0067] - The second support plate 123 may be omitted from the third fixing portion 121 of the second fitting 120. In this modified example, the second connecting plate 125 of the second connecting portion 122 is directly fixed to the second fixing plate 124 of the third fixing portion 121.

[0068] - The second connecting portion 122 may have only one second connecting plate 125. - The second fixing portion 112 may be fixed to the end of the first shaft member 30 in the first fitting 110 by a fixing structure in which the first fixing portion 111 is fixed to the connecting target portion 20. Also, the third fixing portion 121 may be fixed to the end of the second shaft member 40 in the second fitting 120 by a fixing structure in which the first fixing portion 111 is fixed to the connecting target portion 20 in the first fitting 110.

[0069] - In a front view of the first fitting 110, the first angle D1 formed by the first imaginary line RL1 along the first outer edge 118A of the first connecting plate 117 and the second imaginary line RL2 along the second outer edge 118B may be 90° or more. In this modified example, the strength of the first connecting plate 117 can be improved. Also, in a front view of the second fitting 120, the second angle D2 formed by the third imaginary line RL3 along the third outer edge 126A and the fourth imaginary line RL4 along the fourth outer edge 126B may be 90° or more.

[0070] - The second fitting 120 may be connected to the first fitting 110 in a way that prevents rotation. In this modified example, the connecting fitting 100 can fix the second shaft member 40 to the part to be connected 20 such that it is tilted at an angle with respect to the surface to be connected 21.

[0071] The connecting fitting 100 may be used in parts of the frame 2 other than the exposed structure. In this modified example, the connecting fitting 100 can also be used to connect the shaft members. The following technologies are disclosed in this specification.

[0072] [Note 1] A coupling fitting for coupling a first shaft member arranged along a second direction intersecting the first direction to a coupling target surface extending along the first direction of the coupling target surface and a second shaft member arranged diagonally with respect to both the coupling target surface and the first shaft member, comprising: a first fitting attached to the coupling target surface and attached to the end of the first shaft member; and a second fitting attached to the end of the second shaft member and coupled to the first fitting, wherein the first fitting has a first fixing portion fixed to the coupling target surface, a second fixing portion fixed to the end of the first shaft member, and a first coupling portion coupled to the second fitting, the first fixing portion having a first surface in contact with the coupling target surface and a second surface having at least a part of it facing the end face of the first shaft member and on the opposite side from the first surface, and the second fixing portion and the first coupling portion are provided on the second surface.

[0073] [Note 2] The coupling fitting according to Note 1, wherein the coupling target surface is provided with a first hole, the coupling target portion is provided with a first through hole intersecting the first hole, the first fixing portion has a pole that is inserted into the first hole and has a first fixing hole, and with the pole inserted through the first hole, the first fixing shaft member passes through the first through hole and the first fixing hole.

[0074] [Note 3] The coupling fitting according to Note 1, wherein an anchor bolt is provided on the surface to be coupled, a second hole is provided in the first support plate through which the anchor bolt is inserted, and the first fixing part is fixed to the surface to be coupled by fastening a nut to the anchor bolt while the anchor bolt is inserted through the second hole.

[0075] [Note 4] The coupling fitting according to Note 1, wherein the second fitting has a third fixing portion fixed to the end of the second shaft member, and a second coupling portion connected to the third fixing portion and coupled to the first coupling portion of the first fitting, the first coupling portion has a first coupling plate provided with a first coupling hole, and the second coupling portion has a second coupling plate provided with a second coupling hole, and the coupling shaft member passes through the first coupling hole and the second coupling hole.

[0076] [Note 5] The coupling fitting according to Note 4, wherein the outer edge of the first coupling plate has a first outer edge portion and a second outer edge portion, the outer edge of the second coupling plate has a third outer edge portion and a fourth outer edge portion, in a front view of the first fitting, the first angle formed by a first imaginary line along the first outer edge portion and a second imaginary line along the second outer edge portion is less than 90°, and in a front view of the second fitting, the second angle formed by a third imaginary line along the third outer edge portion and a fourth imaginary line along the fourth outer edge portion is less than 90°.

[0077] [Note 6] The coupling fitting according to Note 1, wherein the end face of the first shaft member is provided with a first slit, the first shaft member is provided with a second through hole intersecting the first slit, the second fixing portion has a first fixing plate that is inserted into the first slit and has a second fixing hole, and with the first fixing plate inserted through the first slit, the second fixing shaft member passes through the second through hole and the second fixing hole.

[0078] [Note 7] The second fitting is the coupling fitting described in Note 1, which is rotatably coupled to the first fitting.

[0079] [Note 8] A building comprising a frame, wherein the frame comprises a connecting portion having a connecting surface extending along a first direction, a first axial member arranged along a second direction intersecting the first direction, a second axial member arranged diagonally with respect to both the connecting surface and the first axial member, and a connecting fitting described in any one of Notes 1 to 7, wherein the end of the first axial member and the end of the second axial member are connected to the connecting surface by the connecting fitting.

[0080] 1...Building, 2...Structure, 20...Part to be connected, 21...Surface to be connected, 22...First hole, 23...First through hole, 30...First shaft member, 32...First slit, 33...Second through hole, 40...Second shaft member, 100...Connecting fitting, 110, 110X...First fitting, 111, 111X...First fixing part, 112...Second fixing part, 113...First connecting part, 114, 114X...First support plate, 114A...First surface, 114B...Second surface, 115...Pole, 115A...First fixing hole, 116...First Fixing plate, 116A...Second fixing hole, 117...First connecting plate, 117A...First connecting hole, 118A...First outer edge, 118B...Second outer edge, 119...Second hole, 120...Second fitting, 121...Third fixing part, 122...Second connecting part, 125...Second connecting plate, 125A...Second connecting hole, 126A...Third outer edge, 126B...Fourth outer edge, 310...First fixing shaft member, 320...Second fixing shaft member, 340...Connecting shaft member, 351...Anchor bolt, 352...Nut.

Claims

1. A coupling fitting for coupling a first shaft member arranged along a second direction intersecting the first direction to a coupling surface extending along a first direction of the coupling surface and a second shaft member arranged diagonally with respect to both the coupling surface and the first shaft member, comprising: a first fitting attached to the coupling surface and attached to the end of the first shaft member; and a second fitting attached to the end of the second shaft member and coupled to the first fitting, wherein the first fitting has a first fixing portion fixed to the coupling surface, a second fixing portion fixed to the end of the first shaft member, and a first coupling portion coupled to the second fitting, the first fixing portion having a first surface in contact with the coupling surface and a second surface having at least a portion facing the end face of the first shaft member and opposite to the first surface, and the second fixing portion and the first coupling portion are provided on the second surface.

2. The coupling fitting according to claim 1, wherein the coupling surface is provided with a first hole, the coupling portion is provided with a first through hole intersecting the first hole, the first fixing portion has a pole that is inserted into the first hole and has a first fixing hole, and with the pole inserted through the first hole, the first fixing shaft member passes through the first through hole and the first fixing hole.

3. The coupling fitting according to claim 1, wherein an anchor bolt is provided on the surface to be coupled, a second hole is provided in the first support plate through which the anchor bolt is inserted, and the first fixing part is fixed to the surface to be coupled by fastening a nut to the anchor bolt while the anchor bolt is inserted through the second hole.

4. The coupling fitting according to any one of claims 1 to 3, wherein the second fitting has a third fixing portion fixed to the end of the second shaft member, and a second coupling portion connected to the third fixing portion and coupled to the first coupling portion of the first fitting, the first coupling portion has a first coupling plate provided with a first coupling hole, and the second coupling portion has a second coupling plate provided with a second coupling hole, and the coupling shaft member passes through the first coupling hole and the second coupling hole.

5. The coupling fitting according to claim 4, wherein the outer edge of the first coupling plate has a first outer edge portion and a second outer edge portion, the outer edge of the second coupling plate has a third outer edge portion and a fourth outer edge portion, in a front view of the first fitting, the first angle formed by a first imaginary line along the first outer edge portion and a second imaginary line along the second outer edge portion is less than 90°, and in a front view of the second fitting, the second angle formed by a third imaginary line along the third outer edge portion and a fourth imaginary line along the fourth outer edge portion is less than 90°.

6. The coupling fitting according to any one of claims 1 to 5, wherein the end face of the first shaft member is provided with a first slit, the first shaft member is provided with a second through hole intersecting the first slit, the second fixing portion has a first fixing plate that is inserted into the first slit and has a second fixing hole, and with the first fixing plate inserted through the first slit, the second fixing shaft member passes through the second through hole and the second fixing hole.

7. The coupling fitting according to any one of claims 1 to 6, wherein the second fitting is rotatably coupled to the first fitting.

8. A building comprising a frame, wherein the frame comprises a connecting portion having a connecting surface extending along a first direction, a first axial member arranged along a second direction intersecting the first direction, a second axial member arranged diagonally with respect to both the connecting surface and the first axial member, and a connecting fitting according to any one of claims 1 to 7, wherein the end of the first axial member and the end of the second axial member are connected to the connecting surface by the connecting fitting.

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