Roof frame structure and building

Abstract

A roof frame structure (10) is a framework for a roof corner section (4). The roof corner section (4) has a first roof section and a second roof section that intersects the first roof section. The roof frame structure (10) comprises a first horizontal beam (21) that runs along a lower end or an upper end of the first roof section, a second horizontal beam (22) that runs along a lower end or an upper end of the second roof section, a first sloped member (27) that slopes toward the first horizontal beam (21) and is orthogonal to the first horizontal beam (21) as seen in plan view, a second sloped member (28) that slopes toward the second horizontal beam (22) and is orthogonal to the second horizontal beam (22) as seen in plan view, a first linking member (31) that links the first horizontal beam (21) and the first sloped member (27), and a second linking member (32) that links the second horizontal beam (22) and the second sloped member (28).

Description

Roof frame structures and buildings

[0001] The present disclosure relates to a roof framing structure and a building.

[0002] A roof truss structure is known as a roof framing structure for buildings. A roof truss structure includes beams, roof ribs (also called purlins) that support the roof, and posts that are erected perpendicular to the beams and support the roof ribs.

[0003] Regarding the roof structure of buildings, several structures have been proposed as alternatives to conventional roof truss structures for various purposes. For example, in the technology described in Patent Document 1, the roof structure is composed of multiple frame bodies. The frame bodies include multiple purlins arranged parallel to one another, purlin support beams that support the multiple purlins, and beams that support the purlin support beams.

[0004] Japanese Patent Application Publication No. 05-098723

[0005] However, in the case of conventional roof truss structures or the structure described in Patent Document 1, beams are placed in the space under the roof, making it difficult to create a void space extending all the way to the roof. A beam refers to a short column placed between a beam and a roof truss. It is particularly difficult to create a space directly below the roof corners. Therefore, we propose a roof framing structure that allows for a space to be created directly below the roof corners.

[0006] (1) A roof frame structure of a building that solves the above-mentioned problems is a roof frame structure that is a framework for a roof corner, the roof corner having a first roof portion and a second roof portion that intersects with the first roof portion, and including a first cross member along the lower or upper end of the first roof portion, a second cross member along the lower or upper end of the second roof portion, a first slope member that is inclined toward the first cross member and perpendicular to the first cross member in a planar view, a second slope member that is inclined toward the second cross member and perpendicular to the second cross member in a planar view, a first connecting member that connects the first cross member and the first slope member, and a second connecting member that connects the second cross member and the second slope member.

[0007] Here, "orthogonal" includes two members arranged so that their respective axes are perpendicular to each other. "Two members intersect at right angles" includes a state in which one member is connected to the other member at a right angle in a plan view, and a state in which two members are connected at a right angle via a pillar.

[0008] According to this configuration, a truss structure is formed by the first horizontal member, the first slope member, and the first connecting member. A truss structure is formed by the second horizontal member, the second slope member, and the second connecting member. This structure allows the roof corners to be supported without assembling a roof truss consisting of beams, roof horizontal members, and beams. This allows for a space with fewer framing members to be created directly below the roof corners.

[0009] (2) The roof frame structure described in (1) above further comprises a first pillar supporting the first slope member, a second pillar supporting the second slope member, and a third pillar positioned at the end of the intersection line where the first roof section and the second roof section intersect, wherein the first slope member is connected to the first pillar and the third pillar, and the second slope member is connected to the second pillar and the third pillar.

[0010] According to this configuration, the first gradient member is supported by the first and third columns. The second gradient member is supported by the second and third columns. Therefore, a space can be formed between the first and third columns under the first gradient member. Also, a space can be formed between the second and third columns under the second gradient member. This allows for a wider connection between the space directly below the first roof section at the roof corner and the space directly below the roof section adjacent to the first roof section. Also, it allows for a wider connection between the space directly below the second roof section at the roof corner and the space directly below the roof section adjacent to the second roof section.

[0011] (3) The roof frame structure described in (2) above further includes a fourth column arranged near the point where the first cross member and the second cross member intersect perpendicularly in a plan view, a third cross member arranged parallel to the first cross member, and a fourth cross member arranged parallel to the second cross member, wherein the third cross member is arranged between the first column and the fourth column and connected to the first column and the fourth column, the fourth cross member is arranged between the second column and the fourth column and connected to the second column and the fourth column, the second cross member is arranged between the second gradient member and the third cross member and connected to the second gradient member and the third cross member, or the first cross member is arranged between the first gradient member and the fourth cross member and connected to the first gradient member and the fourth cross member.

[0012] With this configuration, the roof corner is rectangular in plan view. A pillar is placed at each vertex of the roof corner in plan view. Because the corner is supported by four pillars, the corner is stable.

[0013] (4) In the roof frame structure described in (2) above, a fourth pillar is further provided at the portion where the first cross member and the second cross member intersect perpendicularly, the first cross member is disposed between the first pillar and the fourth pillar and is connected to the first pillar and the fourth pillar, and the second cross member is disposed between the second pillar and the fourth pillar and is connected to the second pillar and the fourth pillar.

[0014] With this configuration, the roof corner is rectangular in plan view. A pillar is placed at each vertex of the roof corner in plan view. Because the corner is supported by four pillars, the corner is stable.

[0015] (5) In the roof frame structure described in any one of (1) to (4) above, a third connecting member connecting the first cross member and the second cross member, and a fourth connecting member connecting the first slope member and the second slope member are further provided.

[0016] According to this configuration, the third connecting member and the fourth connecting member can reinforce the frame structure formed by the first cross member, the second cross member, the first slope member, and the second slope member. (6) The roof frame structure described in (5) above further includes a third slope member along the intersection line where the surface along the first roof section and the surface along the second roof section intersect. According to this configuration, corner posts as roof underlayment can be placed on the third slope member. This stabilizes the corner posts.

[0017] (7) In the roof framing structure described in (6) above, the third gradient member is connected to the third connecting member and the fourth connecting member. Because the third gradient member is located along the intersection line between the surface along the first roof section and the surface along the second roof section, without the third connecting member and the fourth connecting member, it would be necessary to connect it to the intersections between the first and second cross members and the first and second gradient members. However, it would be difficult to directly connect the end of the third gradient member to such intersections. In this regard, with the above configuration, one end of the third gradient member can be easily connected to the intersections between the first and second cross members via the third connecting member. Furthermore, the other end of the third gradient member can be easily connected to the intersections between the first and second gradient members via the fourth connecting member.

[0018] (8) In the roof frame structure described in (7) above, the third slope member is arranged between a first surface of the third connecting member and a second surface of the fourth connecting member facing the first surface, and the first surface of the third connecting member is inclined to face upward, and the second surface of the fourth connecting member is inclined to face upward.

[0019] With this configuration, the third gradient member can be easily disposed between the third connecting member and the fourth connecting member, and when the third gradient member is disposed between the third connecting member and the fourth connecting member, the third gradient member can be prevented from falling, thereby enabling efficient construction of the roof frame structure.

[0020] (9) In the roof frame structure described in (1) above, the first connecting member has a first end and a second end opposite the first end, the second connecting member has a third end and a fourth end opposite the third end, the first end of the first connecting member is connected to the first gradient member via a first fitting, the second end of the first connecting member is connected to the first cross member via a second fitting, the third end of the second connecting member is connected to the second gradient member via a third fitting, and the fourth end of the second connecting member is connected to the second cross member via a fourth fitting.

[0021] The first connecting member is disposed at an angle relative to the first gradient member and the first cross member. Therefore, it is difficult to directly connect the first end of the first connecting member to the first gradient member. It is difficult to directly connect the second end of the first connecting member to the first cross member. Furthermore, the second connecting member is disposed at an angle relative to the second gradient member and the second cross member. It is difficult to directly connect the third end of the second connecting member to the second gradient member. It is difficult to directly connect the fourth end of the second connecting member to the second cross member.

[0022] In this regard, with the above configuration, metal fittings are used for these connections, so that the connection between the first end of the first connecting member and the first gradient member, the connection between the second end of the first connecting member and the first cross member, the connection between the third end of the second connecting member and the second gradient member, and the connection between the fourth end of the second connecting member and the second cross member can be carried out efficiently.

[0023] (10) In the roof frame structure described in (9) above, the first connecting member is arranged between a first fitting surface of the first fitting and a second fitting surface of the second fitting that faces the first fitting surface, the first fitting surface of the first fitting is inclined to face upward, and the second fitting surface of the second fitting is inclined to face upward.

[0024] With this configuration, the first connecting member can be easily positioned between the first fitting and the second fitting, and the first connecting member can be prevented from falling when positioned between the first fitting and the second fitting, thereby enabling efficient construction of the roof framing structure.

[0025] (11) In the roof frame structure described in (10) above, the second connecting member is disposed between a third fitting surface of the third fitting and a fourth fitting surface of the fourth fitting that faces the third fitting surface, the third fitting surface of the third fitting is inclined to face upward, and the fourth fitting surface of the fourth fitting is inclined to face upward.

[0026] With this configuration, the second connecting member can be easily positioned between the third fitting and the fourth fitting, and when the second connecting member is positioned between the third fitting and the fourth fitting, the second connecting member can be prevented from falling, thereby enabling efficient construction of the roof framing structure.

[0027] (12) A building that solves the above problems includes the roof frame structure of any one of (1) to (11). With this configuration, the building includes the roof frame structure, so that a space with fewer framing members can be provided directly below the roof corners.

[0028] According to the roof frame structure and building of the present disclosure, a space can be provided directly below the corners of the roof.

[0029] 12 。 13 is a perspective view of a building according to the first embodiment. FIG. 14 is a perspective view of a roof framing structure at a roof corner according to the first embodiment. FIG. 15 is a plan view of a roof framing structure at a roof corner according to the first embodiment. FIG. 16 is a cross-sectional view of the roof framing structure taken along line 4-4 of FIG. 3. FIG. 17 is a cross-sectional view of the roof framing structure taken along line 5-5 of FIG. 3. FIG. 18 is an enlarged view of part A of FIG. 3. FIG. 19 is an enlarged view of part A of FIG. 3, in the roof framing structure before the first connecting member is attached. FIG. 19 is a perspective view of the first fitting. FIG. 19 is a perspective view of the first fitting, seen from a direction different from the direction in which the first fitting in FIG. 8 is viewed. FIG. 19 is a perspective view of a portion of the roof framing structure where the first fitting is attached. FIG. 19 is an enlarged view of part B of FIG. 3. FIG. 19 is a perspective view of the fifth fitting. FIG. 19 is a perspective view of the fifth fitting, seen from a direction different from the direction in which the fifth fitting in FIG. 12 is viewed. FIG. 19 is a perspective view of a portion of the roof framing structure where the fifth fitting is attached. FIG. 19 is a perspective view of a building according to the second embodiment. FIG. 19 is a plan view of a roof framing structure at a roof corner according to the second embodiment. 10A and 10B are perspective views of a roof frame structure at a roof protrusion corner portion according to a third embodiment, and a perspective view of a roof frame structure at a roof recess corner portion according to a fourth embodiment.

[0030] 1 to 14, a roof frame structure 10 according to the present embodiment and a building 1 including the roof frame structure 10 will be described. The present technology will be described using a two-story building 1 as an example.

[0031] [Building] As shown in FIG. 1 , building 1 has roofs 2 and 3. Building 1 in this embodiment has a first-floor roof 2 (also called a shed) and a second-floor roof 3. In this specification, "shed" refers to a single roof attached one level lower than the main roof, or the space beneath it. The first-floor roof 2 has a roof corner 4. The roof corner 4 includes a roof protrusion 5 and a roof recess 6 (see FIG. 18 ). The roof protrusion 5 is a roof portion that covers the protrusion corner of building 1. The roof protrusion 5 has two roof portions 7 that intersect with each other. The two roof portions 7 at the roof protrusion 5 intersect in a mountain shape. The roof recess 6 is a roof portion that covers the recess corner of building 1. The roof recess 6 includes two roof portions 7. The two roof portions 7 at the roof recess 6 intersect in a valley shape.

[0032] The following describes the roof 2 on the first floor. Note that if the roof 3 on the second floor has a roof corner 4, the present technology can also be applied to the roof corner on the second floor. The roof 2 on the first floor has a roof protrusion 5. The roof 2 on the first floor (hereinafter simply referred to as "roof 2") further has a plurality of roof sections 7 adjacent to the roof protrusion 5.

[0033] In this embodiment, the roof corner portion 5 has a first roof portion 7A and a second roof portion 7B that intersects with the first roof portion 7A. The first roof portion 7A is continuous with a third roof portion 7C. The inclination angle of the first roof portion 7A is equal to the inclination angle of the third roof portion 7C. The second roof portion 7B is continuous with a fourth roof portion 7D. The inclination angle of the second roof portion 7B is equal to the inclination angle of the fourth roof portion 7D.

[0034] The building 1 comprises a roof framing structure 10. The roof framing structure 10 is a framework for the roof corners 4. The framework is composed of axial members. The axial members include columns, cross members, and slope members. The slope members include beams and girders. In this embodiment, the roof framing structure 10 comprises a first cross member 21 to a fourth cross member 24 as the slope members. The roof framing structure 10 comprises a first slope member 27 to a third slope member 29 as the slope members. The roof framing structure 10 comprises a first column 41 to a fourth column 44 as the columns.

[0035] The roof corner portion 5 includes a roof frame structure 10, a roof underlayment provided on the roof frame structure 10, and roofing materials. The roof underlayment includes rafters and corner posts. The roofing materials include roof siding and roof tiles.

[0036] 2 and 3 , the roof framing structure 10 includes a first cross member 21, a second cross member 22, a first gradient member 27, a second gradient member 28, a first connecting member 31, and a second connecting member 32. The roof framing structure 10 includes one each of the first cross member 21, the second cross member 22, the first gradient member 27, and the second gradient member 28. The roof framing structure 10 includes one or more first connecting members 31. The roof framing structure 10 includes one or more second connecting members 32. In this embodiment, the roof framing structure 10 includes two first connecting members 31 and two second connecting members 32.

[0037] In this embodiment, the roof frame structure 10 further includes a third connecting member 33 and a fourth connecting member 34. The roof frame structure 10 further includes a third horizontal member 23 and a fourth horizontal member 24. The roof frame structure 10 further includes a third slope member 29.

[0038] [First cross member] The first cross member 21 is made of laminated wood or solid wood. The height dimension of the first cross member 21 is greater than the height dimension of the third cross member 23.

[0039] The first cross member 21 is arranged so as to run along the lower end 7X or upper end of the first roof portion 7A. In this embodiment, the first cross member 21 runs along the lower end 7X of the first roof portion 7A. The first cross member 21 is arranged diagonally above the lower end 7X of the first roof portion 7A. In a plan view, the first cross member 21 is arranged inward of the first exterior wall 8A at the protruding corner of the building 1. The first exterior wall 8A is an exterior wall that intersects with the first roof portion 7A.

[0040] The first cross member 21 is positioned so that the axis of the first cross member 21 is located higher than the axis of the third cross member 23. The third cross member 23 is positioned above the first exterior wall 8A. In this way, the first cross member 21, which has a height dimension greater than that of the third cross member 23, is positioned inward and above the first exterior wall 8A. This makes it possible to form a larger opening in the first exterior wall 8A compared to when the first cross member 21 is positioned above the first exterior wall 8A.

[0041] [Second horizontal member] The second horizontal member 22 is made of laminated wood or solid wood. The height dimension of the second horizontal member 22 is greater than the height dimension of the fourth horizontal member 24.

[0042] The second cross member 22 is arranged so as to run along the lower end 7Y or the upper end of the second roof portion 7B. In this embodiment, the second cross member 22 runs along the lower end 7Y of the second roof portion 7B. The second cross member 22 is arranged diagonally above the lower end 7Y of the second roof portion 7B. In a plan view, the second cross member 22 is arranged inward of the second exterior wall 8B at the protruding corner of the building 1. The second exterior wall 8B is an exterior wall that intersects with the second roof portion 7B.

[0043] The second cross member 22 is positioned so that the axis of the second cross member 22 is located higher than the axis of the fourth cross member 24. The fourth cross member 24 is positioned above the second exterior wall 8B. In this way, the second cross member 22, which has a height dimension greater than that of the fourth cross member 24, is positioned inward and above the second exterior wall 8B. This makes it possible to form a larger opening in the second exterior wall 8B compared to when the second cross member 22 is positioned above the second exterior wall 8B.

[0044] The first cross member 21 is perpendicular to the second cross member 22 in a plan view. In this embodiment, the first cross member 21 abuts against the second cross member 22. This is also referred to as a "second cross member winning assembly." The second cross member 22 is disposed between the second gradient member 28 and the third cross member 23 and is connected to the second gradient member 28 and the third cross member 23. The first cross member 21 is disposed between the first gradient member 27 and the second cross member 22 and is connected to the first gradient member 27 and the second cross member 22.

[0045] In another example, the second cross member 22 may abut against the first cross member 21. This is also called a "first cross member winning assembly." The first cross member 21 is disposed between the first gradient member 27 and the fourth cross member 24 and is connected to the first gradient member 27 and the fourth cross member 24. The second cross member 22 is disposed between the second gradient member 28 and the first cross member 21 and is connected to the second gradient member 28 and the first cross member 21.

[0046] [First gradient member] The first gradient member 27 is made of laminated wood or solid wood. The height dimension of the first gradient member 27 is greater than the height dimension of the third cross member 23. The first gradient member 27 is arranged so as to be perpendicular to the lower end 7X of the first roof section 7A in a plan view. The first gradient member 27 is arranged at the boundary between the first roof section 7A and the third roof section 7C.

[0047] The first gradient member 27 is inclined toward the first cross member 21. The first gradient member 27 is inclined downward toward the first cross member 21. The first gradient member 27 extends toward the first cross member 21 and extends downward beyond the first cross member 21. Furthermore, the first gradient member 27 is perpendicular to the first cross member 21 in a plan view. In this embodiment, the first cross member 21 is connected to the first gradient member 27 so as to abut against it at a right angle in a plan view.

[0048] The first gradient member 27 has a first end 27A and a second end 27B opposite the first end 27A. When the first gradient member 27 is attached to the third column 43, the second end 27B is located lower than the first end 27A.

[0049] The first gradient member 27 is disposed between the first column 41 and the third column 43. The first gradient member 27 is connected to the first column 41 and the third column 43. A first end 27A of the first gradient member 27 is connected to the third column 43 via a mounting bracket. A second end 27B of the first gradient member 27 is connected to the first column 41 via a mounting bracket.

[0050] Mounting brackets are commercially available. One example of a mounting bracket includes a fixed plate fixed to the side of one of the components to be connected, and two insert plates that fit into slits in the end face of the other component. The insert plates are perpendicular to the fixed plate. The insert plates are fixed to the other component by drift pins that intersect the other component and the insert plates. The mounting brackets are not shown in Figures 2 to 6.

[0051] The first gradient member 27 is perpendicular to the second gradient member 28 in a plan view. In this embodiment, the first gradient member 27 is connected to a first side surface 43A, which is one of two side surfaces that form a right angle on the third column 43 (see FIG. 11 ). The second gradient member 28 is connected to a second side surface 43B, which is the other of the two side surfaces that form a right angle on the third column 43. An extension line of the axis of the first gradient member 27 is perpendicular to an extension line of the axis of the second gradient member 28.

[0052] [Second Gradient Member] The second gradient member 28 is made of laminated wood or solid wood. The height of the second gradient member 28 is greater than the height of the fourth cross member 24. The second gradient member 28 is positioned so as to be perpendicular to the lower end 7Y of the second roof section 7B in a plan view. The second gradient member 28 is positioned at the boundary between the second roof section 7B and the fourth roof section 7D.

[0053] The second gradient member 28 is inclined toward the second cross member 22. The second gradient member 28 is inclined downward toward the second cross member 22. The second gradient member 28 extends toward the second cross member 22 and extends downward beyond the second cross member 22. The second gradient member 28 is also perpendicular to the second cross member 22 in a plan view. In this embodiment, the second cross member 22 is connected to the second gradient member 28 so as to abut against it at a right angle in a plan view.

[0054] The second gradient member 28 has a third end 28A and a fourth end 28B opposite the third end 28A. When the second gradient member 28 is attached to the third column 43, the fourth end 28B is located lower than the third end 28A.

[0055] The second gradient member 28 is disposed between the second column 42 and the third column 43. The second gradient member 28 is connected to the second column 42 and the third column 43. A third end 28A of the second gradient member 28 is connected to the third column 43 via a mounting bracket. A fourth end 28B of the second gradient member 28 is connected to the second column 42 via a mounting bracket.

[0056] [Third cross member] The third cross member 23 is arranged parallel to the first cross member 21. The third cross member 23 is connected to the first cross member 21 by a plurality of first connecting members 23A. The third cross member 23 is arranged between the first column 41 and the fourth column 44, and is connected to the first column 41 and the fourth column 44. The third cross member 23 is further supported by a first intermediate column 45. The first intermediate column 45 is arranged between the first column 41 and the fourth column 44. The first intermediate column 45 is also called a tubular column. In this specification, a "tubular column" refers to a column other than a continuous column that stands only on that floor in a wooden building with two or more stories.

[0057] [Fourth cross member] The fourth cross member 24 is arranged parallel to the second cross member 22. The fourth cross member 24 is connected to the second cross member 22 by a plurality of second connection members 24A. The fourth cross member 24 is arranged between the second column 42 and the fourth column 44, and is connected to the second column 42 and the fourth column 44. The fourth cross member 24 is further supported by a second intermediate column 46. The second intermediate column 46 is arranged between the second column 42 and the fourth column 44. The second intermediate column 46 is also called a tubular column.

[0058] [Third Gradient Member] The third gradient member 29 is made of laminated wood or solid wood. The height dimension of the third gradient member 29 is greater than the height dimension of the third cross member 23.

[0059] 3, the third slope member 29 is disposed along an intersection line 7R where a surface along the first roof portion 7A intersects with a surface along the second roof portion 7B. The third slope member 29 is disposed between a third connecting member 33 (described later) and a fourth connecting member 34 (described later). The third slope member 29 is connected to the third connecting member 33 and the fourth connecting member 34.

[0060] The third gradient member 29 has a first end 29A and a second end 29B opposite the first end 29A. The first end 29A of the third gradient member 29 is connected to the third linking member 33 via a mounting bracket. The second end 29B of the third gradient member 29 is connected to the fourth linking member 34 via a mounting bracket.

[0061] Here, we define the mounting state of the third gradient member 29. The mounting state of the third gradient member 29 indicates a state in which a first end 29A of the third gradient member 29 is connected to the third connecting member 33 via a mounting hardware, and a second end 29B of the third gradient member 29 is connected to the fourth connecting member 34 via a hardware.

[0062] 4 , the third gradient member 29 is disposed between the first surface 33C of the third connecting member 33 and the second surface 34C of the fourth connecting member 34. The second surface 34C of the fourth connecting member 34 faces the first surface 33C of the third connecting member 33.

[0063] 4, the third gradient member 29 has a first end face 29C, which is an end face closer to the first end 29A, and a second end face 29D opposite the first end face 29C in the longitudinal direction. The first end face 29C of the third gradient member 29 is formed so as to be parallel to the first face 33C of the third connecting member 33 when the third gradient member 29 is attached. The second end face 29D of the third gradient member 29 is formed so as to be parallel to the second face 34C of the fourth connecting member 34 when the third gradient member 29 is attached. Therefore, the third gradient member 29 is trapezoidal in side view.

[0064] [First connecting member] The first connecting member 31 is made of laminated wood or solid wood. Of the two first connecting members 31, the one closest to the third gradient member 29 has a height dimension equal to or slightly smaller than the height dimension of the third gradient member 29. Of the two first connecting members 31, the one farthest from the third gradient member 29 has a height dimension smaller than the height dimension of the third gradient member 29.

[0065] In a plan view, the first connecting member 31 intersects with the first gradient member 27 at a first angle. The first angle is defined as the angle between the first connecting member 31 and a portion of the first gradient member 27 that is lower in the tilt direction than the portion to which the first connecting member 31 is connected. The first angle is, for example, 45 degrees.

[0066] As shown in Figure 3, the first connecting member 31 connects the first cross member 21 and the first gradient member 27. The first connecting member 31 has a first end 31A and a second end 31B opposite the first end 31A. The first end 31A of the first connecting member 31 is connected to the first gradient member 27 via a first metal fitting 51. The second end 31B of the first connecting member 31 is connected to the first cross member 21 via a second metal fitting 52.

[0067] 5 , the first connecting member 31 is disposed between a first metal fitting surface 51A of the first metal fitting 51 and a second metal fitting surface 52A of the second metal fitting 52 that faces the first metal fitting surface 51A. The first metal fitting surface 51A of the first metal fitting 51 is inclined so as to face upward. The second metal fitting surface 52A of the second metal fitting 52 is inclined so as to face upward.

[0068] [Second connecting member] The second connecting member 32 is made of laminated wood or solid wood. Of the two second connecting members 32, the one closest to the third gradient member 29 has a height dimension equal to or slightly smaller than the height dimension of the third gradient member 29. Of the two second connecting members 32, the one farthest from the third gradient member 29 has a height dimension smaller than the height dimension of the third gradient member 29.

[0069] In a plan view, the second connecting member 32 intersects with the second gradient member 28 at a second angle. The second angle is defined as the angle between the second connecting member 32 and a portion of the second gradient member 28 that is lower in the inclination direction than the portion to which the second connecting member 32 is connected. The second angle is, for example, 45 degrees.

[0070] As shown in Figure 3, the second connecting member 32 connects the second cross member 22 and the second gradient member 28. The second connecting member 32 has a third end 32A and a fourth end 32B opposite the third end 32A. The third end 32A of the second connecting member 32 is connected to the second gradient member 28 via a third metal fitting 53. The fourth end 32B of the second connecting member 32 is connected to the second cross member 22 via a fourth metal fitting 54.

[0071] The second connecting member 32 is disposed between a third metal fitting surface 53A of the third metal fitting 53 and a fourth metal fitting surface 54A of the fourth metal fitting 54 that faces the third metal fitting surface 53A. The third metal fitting surface 53A of the third metal fitting 53 is inclined so as to face upward. The fourth metal fitting surface 54A of the fourth metal fitting 54 is inclined so as to face upward.

[0072] [Third Connecting Member] The third connecting member 33 is made of laminated wood or solid wood. The third connecting member 33 is arranged horizontally. The height dimension of the third connecting member 33 is equal to or slightly greater than the height dimension of the third gradient member 29.

[0073] In a plan view, the third connecting member 33 intersects with the first cross member 21 at a third angle. The third angle is defined as the angle between the third connecting member 33 and a portion of the first cross member 21 that is closer to the tip of the external corner than the portion to which the third connecting member 33 is connected. The third angle is, for example, 45 degrees.

[0074] As shown in Figure 3, the third connecting member 33 connects the first cross member 21 and the second cross member 22. The third connecting member 33 has a first end 33A and a second end 33B opposite the first end 33A. The first end 33A of the third connecting member 33 is connected to the first cross member 21 via a seventh metal fitting 57. The second end 33B of the third connecting member 33 is connected to the second cross member 22 via an eighth metal fitting 58. Hereinafter, the state in which the third connecting member 33 is connected to the first cross member 21 and the second cross member 22 via the metal fittings will be referred to as the attached state of the third connecting member 33.

[0075] The third connecting member 33 has a first surface 33C, a first end surface 33D provided at the first end portion 33A, and a second end surface 33E provided at the second end portion 33B. The first end surface 33D contacts the seventh fitting 57. The second end surface 33E contacts the eighth fitting 58.

[0076] The first surface 33C of the third connecting member 33 is a surface that intersects the first end surface 33D and the second end surface 33E, and connects the first end surface 33D and the second end surface 33E between the first end surface 33D and the second end surface 33E.

[0077] 4, the first surface 33C of the third connecting member 33 is inclined so as to face upward. Specifically, when the third connecting member 33 is attached, the first surface 33C of the third connecting member 33 faces the second surface 34C of the fourth connecting member 34 and is inclined with respect to the vertical direction so as to face upward.

[0078] [Fourth Connecting Member] The fourth connecting member 34 is made of laminated wood or solid wood. The fourth connecting member 34 is arranged horizontally. The height dimension of the fourth connecting member 34 is equal to or slightly greater than the height dimension of the third gradient member 29.

[0079] In a plan view, the fourth connecting member 34 intersects with the first gradient member 27 at a fourth angle. The fourth angle is defined as the angle between the fourth connecting member 34 and a portion of the first gradient member 27 that is closer to the third column 43 than the portion to which the fourth connecting member 34 is connected. The fourth angle is, for example, 45 degrees.

[0080] As shown in FIG. 3 , the fourth connecting member 34 connects the first gradient member 27 and the second gradient member 28. The fourth connecting member 34 has a third end 34A and a fourth end 34B opposite the third end 34A. The third end 34A of the fourth connecting member 34 is connected to the first gradient member 27 via a fifth metal fitting 55. The fourth end 34B of the fourth connecting member 34 is connected to the second gradient member 28 via a sixth metal fitting 56. Hereinafter, the state in which the fourth connecting member 34 is connected to the first gradient member 27 and the second gradient member 28 via the metal fittings will be referred to as the attached state of the fourth connecting member 34.

[0081] The fourth connecting member 34 has a second surface 34C, a third end surface 34D provided at the third end portion 34A, and a fourth end surface 34E provided at the fourth end portion 34B. The third end surface 34D contacts the fifth fitting 55. The fourth end surface 34E contacts the sixth fitting 56.

[0082] The second surface 34C of the fourth connecting member 34 is a surface that intersects the third end surface 34D and the fourth end surface 34E, and connects the third end surface 34D and the fourth end surface 34E between the third end surface 34D and the fourth end surface 34E.

[0083] 4, the second surface 34C of the fourth connecting member 34 is inclined so as to face upward. Specifically, when the fourth connecting member 34 is attached, the second surface 34C of the fourth connecting member 34 faces the first surface 33C of the third connecting member 33 and is inclined with respect to the vertical direction so as to face upward.

[0084] [Column] The first column 41 supports the first gradient member 27. Specifically, the first column 41 supports the second end 27B of the first gradient member 27. The second end 27B of the first gradient member 27 is connected to the first column 41 via a mounting bracket.

[0085] The second pillar 42 supports the second gradient member 28. Specifically, the second pillar 42 supports the fourth end 28B of the second gradient member 28. The fourth end 28B of the second gradient member 28 is connected to the second pillar 42 via a mounting bracket.

[0086] The third pillar 43 is located at the end of the intersection line 7R where the first roof portion 7A and the second roof portion 7B intersect. The third pillar 43 is located where the first gradient member 27 and the second gradient member 28 intersect in a plan view. The third pillar 43 supports the first end 27A of the first gradient member 27 and the third end 28A of the second gradient member 28. The third pillar 43 is rectangular in a plan view. The first end 27A of the first gradient member 27 is connected to a first side surface 43A of the third pillar 43 via a mounting bracket. The third end 28A of the second gradient member 28 is connected to a second side surface 43B of the third pillar 43, which is perpendicular to the first side surface 43A, via a mounting bracket.

[0087] The fourth column 44 is disposed near the portion where the first cross member 21 and the second cross member 22 intersect at right angles in plan view. Specifically, the fourth column 44 is disposed on a diagonal line passing through the third column 43 in the following rectangular frame in plan view. The rectangular frame indicates a rectangular frame formed by the first cross member 21, the second cross member 22, the first gradient member 27, and the second gradient member 28.

[0088] The fourth column 44 supports the end of the third cross member 23 closest to the fourth cross member 24. The fourth column 44 supports the end of the fourth cross member 24 closest to the third cross member 23. An end of the third cross member 23 is connected to a first side surface 44A of the fourth column 44 via a mounting bracket. An end of the fourth cross member 24 is connected to a second side surface 44B of the fourth column 44, which is perpendicular to the first side surface 44A, via a mounting bracket.

[0089] [Relationship between Pillars and Other Members] The first gradient member 27 is bridged diagonally from the third pillar 43 to the first pillar 41. The second gradient member 28 is bridged diagonally from the third pillar 43 to the second pillar 42. The second gradient member 28 is perpendicular to the first gradient member 27 in a plan view.

[0090] The third cross member 23 is laid horizontally from the fourth column 44 to the first column 41. The third cross member 23 is arranged parallel to the second gradient member 28 in a plan view. The fourth cross member 24 is laid horizontally from the fourth column 44 to the second column 42. The fourth cross member 24 is arranged parallel to the first gradient member 27 in a plan view.

[0091] The first cross member 21 spans horizontally from a portion of the first gradient member 27 near the second end 27B to a portion of the second cross member 22 near the fourth column 44. In a plan view, the first cross member 21 is perpendicular to the first gradient member 27 and the second cross member 22. In a plan view, the first cross member 21 is disposed between the second gradient member 28 and the third cross member 23. In a plan view, the first cross member 21 is disposed parallel to the second gradient member 28 and the third cross member 23.

[0092] The second cross member 22 spans horizontally from a portion of the second gradient member 28 near the fourth end 28B to a portion of the third cross member 23 near the fourth column 44. In a plan view, the second cross member 22 is perpendicular to the second gradient member 28 and the third cross member 23. In a plan view, the second cross member 22 is disposed between the first gradient member 27 and the fourth cross member 24. In a plan view, the second cross member 22 is disposed parallel to the first gradient member 27 and the fourth cross member 24.

[0093] The first connecting member 31 connects the first gradient member 27 and the first cross member 21. The first connecting member 31 is arranged at 45 degrees relative to the first gradient member 27 in a plan view. The second connecting member 32 connects the second gradient member 28 and the third cross member 23. The second connecting member 32 is arranged at 45 degrees relative to the second gradient member 28 in a plan view.

[0094] The third connecting member 33 connects the first cross member 21 and the second cross member 22. The third connecting member 33 is arranged at 45 degrees relative to the first cross member 21 in a plan view. The fourth connecting member 34 connects the first gradient member 27 and the second gradient member 28. The fourth connecting member 34 is arranged at 45 degrees relative to the first gradient member 27 in a plan view.

[0095] The third gradient member 29 connects the third connecting member 33 and the fourth connecting member 34. In a plan view, the third gradient member 29 is perpendicular to the third connecting member 33 and the fourth connecting member 34. In a plan view, the third gradient member 29 is arranged parallel to the first connecting member 31 and arranged parallel to the second connecting member 32.

[0096] A first connecting member 23A is provided between the first cross member 21 and the third cross member 23, connecting the first cross member 21 and the third cross member 23. A second connecting member 24A is provided between the second cross member 22 and the fourth cross member 24, connecting the second cross member 22 and the fourth cross member 24.

[0097] [First fitting] The first fitting 51 will be described with reference to Figures 3 and 6 to 10. As shown in Figures 3 and 6, the first fitting 51 connects the first gradient member 27 and the first connecting member 31. Here, in order to explain the relationship between the first fitting 51 and other members, the attachment state of the first fitting 51 will be defined. The state in which the first fitting 51 is attached to the first gradient member 27 and the first connecting member 31 is connected to the first fitting 51 will be referred to as the attachment state of the first fitting 51 below.

[0098] 6 and 8 , the first metal fitting 51 has a first fixing plate 61 fixed to the first side surface 27C of the first gradient member 27, a second fixing plate 62 fixed to the first connecting member 31, and a first connecting plate 63 connecting the first fixing plate 61 and the second fixing plate 62. The first fixing plate 61 and the second fixing plate 62 are provided with a plurality of first bolt holes 64 for inserting bolts therethrough.

[0099] 9 , the first metal fitting 51 is provided with a first rib 65 that connects the first fixed plate 61 and the second fixed plate 62. The first rib 65 extends perpendicular to the first fixed plate 61 and the first connecting plate 63.

[0100] 7 , the first fitting 51 is configured so that, in a plan view, extension lines L1, L2 of the upper end 62A and the lower end 62B of the second fixing plate 62 intersect the first gradient member 27 at a fifth angle when viewed from above when the first fitting 51 is attached. The fifth angle is, for example, 45 degrees. Furthermore, the first fitting 51 is configured so that, in a plan view when the first fitting 51 is attached, the second fixing plate 62 is tilted at an angle that allows the lower end 62B of the second fixing plate 62 to be seen without overlapping the upper end 62A when viewed from above.

[0101] Figure 10 is a view of the first metal fitting 51 as seen from the same direction as the direction along line 5-5 in Figure 3. As shown in Figure 10, the second fixing plate 62 is inclined downward in the direction toward the first connecting member 31.

[0102] 3 , the second fitting 52 connects the first cross member 21 and the first connecting member 31. The second fitting 52 has a structure similar to that of the first fitting 51. The second fitting 52 has a structure that is changed from a plane-symmetrical structure to that of the first fitting 51 with respect to a plane perpendicular to the first connecting member 31 to a shape that corresponds to the connection between the first cross member 21 and the first connecting member 31.

[0103] 3 , the third fitting 53 connects the second gradient member 28 and the second connecting member 32. The third fitting 53 has a structure similar to that of the first fitting 51. The third fitting 53 has a structure that is plane-symmetrical to the first fitting 51 with respect to a plane P that passes through the axis of the third column 43 and the axis of the fourth column 44.

[0104] 3 , the fourth metal fitting 54 connects the second cross member 22 and the second connecting member 32. The fourth metal fitting 54 has a structure similar to that of the second metal fitting 52. The fourth metal fitting 54 has a structure that is plane-symmetrical to the second metal fitting 52 with respect to a plane P that passes through the axis of the third column 43 and the axis of the fourth column 44.

[0105] [Fifth fitting] The fifth fitting 55 will be described with reference to Figures 3 and 11 to 14. As shown in Figures 3 and 11, the fifth fitting 55 connects the first gradient member 27 and the fourth connecting member 34. Here, in order to explain the relationship between the fifth fitting 55 and other members, the attachment state of the fifth fitting 55 will be defined. The state in which the fifth fitting 55 is attached to the first gradient member 27 and the fourth connecting member 34 is connected to the fifth fitting 55 will be referred to as the attachment state of the fifth fitting 55 below.

[0106] 11 and 12 , the fifth metal fitting 55 has a third fixing plate 71 fixed to the first side surface 27C of the first gradient member 27, a fourth fixing plate 72 fixed to the fourth connecting member 34, and a second connecting plate 73 connecting the third fixing plate 71 and the fourth fixing plate 72. The third fixing plate 71 and the fourth fixing plate 72 are provided with a plurality of second bolt holes 74 for inserting bolts therethrough.

[0107] 13 , the fifth metal fitting 55 is provided with a second rib 75 that connects the third fixed plate 71 and the fourth fixed plate 72. The second rib 75 extends perpendicular to the third fixed plate 71 and the second connecting plate 73.

[0108] 11 , the fifth fitting 55 is configured so that, in a plan view, when the fifth fitting 55 is attached, extension lines L3, L4 of the upper end 72A and the lower end 72B of the fourth fixing plate 72 intersect with the first gradient member 27 at a sixth angle. The sixth angle is, for example, 45 degrees. Furthermore, when the fifth fitting 55 is attached, the fourth fixing plate 72 extends vertically so that the lower end 72B of the fourth fixing plate 72 overlaps the upper end 72A when viewed from above.

[0109] Figure 14 is a view of the fifth metal fitting 55 seen from the same direction as the direction along line 5-5 in Figure 3. As shown in Figure 14, the multiple second bolt holes 74 provided in the fourth fixing plate 72 are arranged along line X. Line X is defined as a line along the line where the second surface 34C of the fourth connecting member 34 intersects with plane P that passes through the axis of the third pillar 43 and the axis of the fourth pillar 44.

[0110] 3 , the sixth fitting 56 connects the second gradient member 28 and the fourth connecting member 34. The sixth fitting 56 has a structure similar to that of the fifth fitting 55. The sixth fitting 56 has a structure that is plane-symmetrical to the fifth fitting 55 with respect to a plane P that passes through the axis of the third column 43 and the axis of the fourth column 44.

[0111] 3 , the seventh metal fitting 57 connects the first cross member 21 and the third connecting member 33. The seventh metal fitting 57 has a structure similar to that of the fifth metal fitting 55. The seventh metal fitting 57 has a structure that is plane-symmetrical to the fifth metal fitting 55 with respect to a plane P that passes through the axis of the second column 42 and the axis of the fourth column 44, but has a shape that is modified to accommodate the connection between the first cross member 21 and the third connecting member 33.

[0112] 3 , the eighth metal fitting 58 connects the second cross member 22 and the third connecting member 33. The eighth metal fitting 58 has a structure similar to that of the seventh metal fitting 57. The eighth metal fitting 58 has a structure that is plane-symmetrical to that of the seventh metal fitting 57 with respect to a plane P that passes through the axis of the third column 43 and the axis of the fourth column 44.

[0113] [Operation of this embodiment] When constructing the roof 2 using a truss structure, it is possible to connect the first cross member 21 and the third gradient member 29 with a connecting member, and also connect the second cross member 22 and the third gradient member 29 with a connecting member. Hereinafter, this type of structure will be referred to as the "reference example." However, in this reference example, the third gradient member 29 supports two connecting members, which increases the load applied to the third gradient member 29. As a result, the load on the fourth column 44 increases. In this way, there is a risk that the roof load will be unevenly distributed between the third gradient member 29 and the fourth column 44.

[0114] In this regard, in the present embodiment, the roof frame structure 10 includes a first connecting member 31 connecting the first cross member 21 and the first slope member 27, and a second connecting member 32 connecting the second cross member 22 and the second slope member 28. With this configuration, the first cross member 21, the first slope member 27, and the first connecting member 31 form a truss structure. The second cross member 22, the second slope member 28, and the second connecting member 32 form a truss structure. Therefore, the roof corner 4 can be supported without assembling a roof truss structure including beams, roof cross members, and beams. Furthermore, with this structure, the first connecting member 31 and the second connecting member 32 are not connected to the third slope member 29, so the roof load can be distributed to the columns at the four corners of the roof corner 4, compared to the reference example. This stabilizes the roof corner 4.

[0115] [Advantages of this embodiment] The advantages of this embodiment will be described. (1) The roof frame structure 10 includes a first connecting member 31 that connects the first cross member 21 and the first slope member 27, and a second connecting member 32 that connects the second cross member 22 and the second slope member 28. With this configuration, a truss structure is formed by the first cross member 21, the first slope member 27, and the first connecting member 31. A truss structure is formed by the second cross member 22, the second slope member 28, and the second connecting member 32. This structure allows the roof corners 4 to be supported without assembling a roof truss including beams, roof cross members, and beams. This allows for a space with fewer framing members to be provided directly below the roof corners 4.

[0116] (2) In the roof frame structure 10, the first gradient member 27 is connected to the first column 41 and the third column 43. The second gradient member 28 is connected to the second column 42 and the third column 43. With this configuration, a space can be formed below the first gradient member 27 between the first column 41 and the third column 43. Also, a space can be formed below the second gradient member 28 between the second column 42 and the third column 43. This allows for a wider connection between the space directly below the first roof portion 7A of the roof corner 4 and the space directly below the roof portion adjacent to the first roof portion 7A. Also, it allows for a wider connection between the space directly below the second roof portion 7B of the roof corner 4 and the space directly below the roof portion adjacent to the second roof portion 7B.

[0117] (3) In the roof frame structure 10, the third horizontal member 23 is disposed between the first column 41 and the fourth column 44 and is connected to the first column 41 and the fourth column 44. The fourth horizontal member 24 is disposed between the second column 42 and the fourth column 44 and is connected to the second column 42 and the fourth column 44. The second horizontal member 22 is assembled to the first horizontal member 21 at the intersection with the first horizontal member 21 with the second horizontal member 22 facing forward. Specifically, the second horizontal member 22 is disposed between the second gradient member 28 and the third horizontal member 23 and is connected to the second gradient member 28 and the third horizontal member 23.

[0118] On the other hand, the first cross member 21 may be assembled to the second cross member 22 at the intersection with the second cross member 22 so that the first cross member 21 is ahead of the second cross member 22. Specifically, the first cross member 21 is disposed between the first gradient member 27 and the fourth cross member 24 and connected to the first gradient member 27 and the fourth cross member 24.

[0119] According to this configuration, the roof corner 4 is rectangular in plan view. In plan view, a pillar is placed at each vertex of the roof protruding corner 5. In this way, the protruding corner is supported by four pillars, making the protruding corner stable.

[0120] (4) The roof frame structure 10 further includes a third connecting member 33 that connects the first cross member 21 and the second cross member 22, and a fourth connecting member 34 that connects the first slope member 27 and the second slope member 28.

[0121] According to this configuration, the third connecting member 33 and the fourth connecting member 34 can reinforce the frame structure formed by the first cross member 21, the second cross member 22, the first gradient member 27, and the second gradient member 28.

[0122] (5) The roof frame structure 10 further includes a third slope member 29. The third slope member 29 is arranged along the intersection line 7R where the surface along the first roof section 7A and the surface along the second roof section 7B intersect. With this configuration, corner posts as roof underlayment can be placed on the third slope member 29. This stabilizes the corner posts.

[0123] (6) In this embodiment, the third gradient member 29 is connected to the third connecting member 33 and the fourth connecting member 34. In this case, the third gradient member 29 is located along the intersection line 7R, where the surface along the first roof portion 7A intersects with the surface along the second roof portion 7B. Therefore, without the third connecting member 33 and the fourth connecting member 34, the third gradient member 29 would need to be connected to the intersections between the first cross member 21 and the second cross member 22 and the intersections between the first gradient member 27 and the second gradient member 28. However, it would be difficult to directly connect the end of the third gradient member 29 to such intersections.

[0124] In this regard, with the above-described configuration, the first end 29A of the third gradient member 29 can be easily connected to the intersection of the first cross member 21 and the second cross member 22 via the third connecting member 33. Also, the second end 29B of the third gradient member 29 can be easily connected to the intersection of the first gradient member 27 and the second gradient member 28 via the fourth connecting member 34.

[0125] (7) The third gradient member 29 is disposed between the first surface 33C of the third connecting member 33 and the second surface 34C of the fourth connecting member 34, the second surface 34C facing the first surface 33C. The first surface 33C of the third connecting member 33 is inclined to face upward. The second surface 34C of the fourth connecting member 34 is inclined to face upward.

[0126] According to this configuration, the third gradient member 29 can be easily disposed between the third connecting member 33 and the fourth connecting member 34, and the third gradient member 29 can be prevented from falling when disposed between the third connecting member 33 and the fourth connecting member 34. Therefore, the construction of the roof frame structure 10 can be carried out efficiently.

[0127] (8) The first end 31A of the first connecting member 31 is connected to the first gradient member 27 via a first metal fitting 51. The second end 31B of the first connecting member 31 is connected to the first cross member 21 via a second metal fitting 52. The third end 32A of the second connecting member 32 is connected to the second gradient member 28 via a third metal fitting 53. The fourth end 32B of the second connecting member 32 is connected to the second cross member 22 via a fourth metal fitting 54.

[0128] The first connecting member 31 is disposed at an angle relative to the first gradient member 27 and the first cross member 21. Therefore, it is difficult to directly connect the first end 31A of the first connecting member 31 to the first gradient member 27. It is difficult to directly connect the second end 31B of the first connecting member 31 to the first cross member 21. Furthermore, the second connecting member 32 is disposed at an angle relative to the second gradient member 28 and the second cross member 22. Therefore, it is difficult to directly connect the third end 32A of the second connecting member 32 to the second gradient member 28. It is difficult to directly connect the fourth end 32B of the second connecting member 32 to the second cross member 22.

[0129] In this regard, with the above configuration, metal fittings are used for these connections, so that the connection between the first end 31A of the first connecting member 31 and the first slope member 27, the connection between the second end 31B of the first connecting member 31 and the first cross member 21, the connection between the third end 32A of the second connecting member 32 and the second slope member 28, and the connection between the fourth end 32B of the second connecting member 32 and the second cross member 22 can be carried out efficiently.

[0130] (9) The first connecting member 31 is disposed between the first metal fitting surface 51A of the first metal fitting 51 and the second metal fitting surface 52A of the second metal fitting 52 that faces the first metal fitting surface 51A. The first metal fitting surface 51A of the first metal fitting 51 is inclined so as to face upward. The second metal fitting surface 52A of the second metal fitting 52 is inclined so as to face upward.

[0131] This configuration makes it possible to easily position the first connecting member 31 between the first fitting 51 and the second fitting 52, and also prevents the first connecting member 31 from falling when positioned between the first fitting 51 and the second fitting 52. This allows the roof frame structure 10 to be constructed efficiently.

[0132] (10) The second connecting member 32 is disposed between the third metal fitting surface 53A of the third metal fitting 53 and the fourth metal fitting surface 54A of the fourth metal fitting 54 that faces the third metal fitting surface 53A. The third metal fitting surface 53A of the third metal fitting 53 is inclined so as to face upward. The fourth metal fitting surface 54A of the fourth metal fitting 54 is inclined so as to face upward.

[0133] This configuration makes it possible to easily position the second connecting member 32 between the third fitting 53 and the fourth fitting 54, and also prevents the second connecting member 32 from falling when positioned between the third fitting 53 and the fourth fitting 54. This allows for efficient construction of the roof frame structure 10.

[0134] (11) The building 1 includes the above-described roof frame structure 10. According to this configuration, since the building 1 includes the above-described roof frame structure 10, a space with fewer framing members can be provided directly below the roof corners 4.

[0135] <Second embodiment> A roof frame structure 10 according to a second embodiment will be described with reference to Figures 15 and 16. In this embodiment, components common to the first embodiment are designated by the same reference numerals as those in the first embodiment, and descriptions of overlapping components will be omitted.

[0136] In the first embodiment, the roof frame structure 10 is applied to the framework of one roof corner portion 5. In the second embodiment, the roof frame structure 10 is applied to the framework of a roof 2 in which two roof corner portions 5 are connected. That is, the roof frame structure 10 is applied to a hip roof.

[0137] Figure 15 shows a building 1 with a hipped roof to which a roof framing structure 10 is applied. The roof framing structure 10 is applied to each of the four roof corners 5 of the hipped roof of the building 1. Specifically, as shown in Figure 16, the roof framing structure 10 is applied to the framework of each of the two roof corners 5. In this example, the first slope member 27 of one roof framing structure 10 is common to the second slope member 28 of the other roof framing structure 10.

[0138] <Third embodiment> A roof frame structure 10 according to a third embodiment will be described with reference to Fig. 17. In this embodiment, components common to the first embodiment are designated by the same reference numerals as those in the first embodiment, and descriptions of overlapping components will be omitted.

[0139] In the first embodiment, the fourth column 44 is disposed away from the intersection of the first cross member 21 and the second cross member 22. In the present embodiment, the fourth column 44 is disposed at the intersection of the first cross member 21 and the second cross member 22. Specifically, the fourth column 44 is disposed at the portion where the first cross member 21 and the second cross member 22 intersect at right angles.

[0140] The first horizontal member 21 is disposed between the first column 41 and the fourth column 44, and is connected to the first column 41 and the fourth column 44. The second horizontal member 22 is disposed between the second column 42 and the fourth column 44, and is connected to the second column 42 and the fourth column 44. In this embodiment, the roof frame structure 10 does not have the third horizontal member 23 or the fourth horizontal member 24.

[0141] According to the roof frame structure 10 of this embodiment, the roof corner 4 is rectangular in plan view. In plan view, a pillar is disposed at each vertex of the roof protruding corner 5. In this way, the protruding corner is supported by four pillars, making the protruding corner stable.

[0142] <Fourth embodiment> A roof frame structure 10 according to a third embodiment will be described with reference to Fig. 18. In this embodiment, components common to the first embodiment are designated by the same reference numerals as those in the first embodiment, and descriptions of overlapping components will be omitted.

[0143] In the first embodiment, the roof frame structure 10 is applied to the framework of the roof corner portion 5. In contrast, in this embodiment, the roof frame structure 10 is applied to the framework of the roof recessed corner portion 6. The differences from the first embodiment are as follows.

[0144] 18 , the first horizontal member 21 is aligned along the upper edge of the first roof portion 7A. The second horizontal member 22 is aligned along the upper edge of the second roof portion 7B. In the first embodiment, in order to enlarge the opening in the exterior wall, the third horizontal member 23 and the fourth horizontal member 24, which are smaller in height than the first horizontal member 21 and the second horizontal member 22, are provided. In contrast, in the present embodiment, the third horizontal member 23 and the fourth horizontal member 24 are provided in order to enlarge the interior opening.

[0145] <Modifications> The above-described embodiments are examples of possible forms of the roof frame structure 10 and the building 1, and are not intended to limit the forms. The roof frame structure 10 and the building 1 may take forms different from those exemplified in the above-described embodiments. Examples of such forms include forms in which part of the configuration of the embodiment is replaced, modified, or omitted, or forms in which a new configuration is added to the embodiment. Modifications of the embodiments are shown below.

[0146] The roof structure 10 can also be applied to a porch roof (also called a canopy) with an outside corner structure or an inside corner structure. The roof structure 10 can also be applied to a second-floor roof or a roof of a floor higher than the second floor.

[0147] In the roof frame structure 10, the first end 29A of the third gradient member 29 may be connected to the first gradient member 27 or the second gradient member 28 via a metal fitting. The second end 29B of the third gradient member 29 may be connected to the first cross member 21 or the second cross member 22 via a metal fitting.

[0148] This specification discloses the following technology. [Supplementary Note 1] Supplementary Note 1 relates to a roof framing structure for a building. The roof framing structure for a building is a framework for a roof corner. The roof corner has a first roof section and a second roof section that intersects with the first roof section. The roof framing structure for a building includes a first horizontal member along the lower or upper end of the first roof section, a second horizontal member along the lower or upper end of the second roof section, a first slope member that is inclined toward the first horizontal member and perpendicular to the first horizontal member in a plan view, a second slope member that is inclined toward the second horizontal member and perpendicular to the second horizontal member in a plan view, a first connecting member that connects the first horizontal member to the first slope member, and a second connecting member that connects the second horizontal member to the second slope member.

[0149] [Supplementary Note 2] The roof frame structure described in Supplementary Note 1 further includes a first pillar supporting the first slope member, a second pillar supporting the second slope member, and a third pillar disposed at an end of an intersection line where the first roof portion and the second roof portion intersect. The first slope member is connected to the first pillar and the third pillar. The second slope member is connected to the second pillar and the third pillar.

[0150] [Supplementary Note 3] In the roof framing structure described in Supplementary Note 2, the roof framing structure further includes a fourth column arranged near a portion where the first horizontal member and the second horizontal member intersect perpendicularly in a plan view, a third horizontal member arranged parallel to the first horizontal member, and a fourth horizontal member arranged parallel to the second horizontal member. The third horizontal member is arranged between the first column and the fourth column and connected to the first column and the fourth column. The fourth horizontal member is arranged between the second column and the fourth column and connected to the second column and the fourth column. The second horizontal member is arranged between the second gradient member and the third horizontal member and connected to the second gradient member and the third horizontal member. Alternatively, the first horizontal member may be arranged between the first gradient member and the fourth horizontal member and connected to the first gradient member and the fourth horizontal member.

[0151] [Supplementary Note 4] The roof framing structure described in Supplementary Note 2 further includes a fourth column arranged at a portion where the first horizontal member and the second horizontal member intersect at right angles. The first horizontal member is arranged between the first column and the fourth column and connected to the first column and the fourth column. The second horizontal member is arranged between the second column and the fourth column and connected to the second column and the fourth column.

[0152] [Appendix 5] In the roof structure described in Appendix 1, the roof structure further includes a third connecting member connecting the first cross member and the second cross member, and a fourth connecting member connecting the first slope member and the second slope member.

[0153] [Appendix 6] In the roof frame structure described in Appendix 5, the roof frame structure further includes a third slope member along the intersection line where the surface along the first roof portion and the surface along the second roof portion intersect.

[0154] [Supplementary Note 7] In the roof framing structure described in Supplementary Note 6, the third gradient member is connected to the third connecting member and the fourth connecting member.

[0155] [Supplementary Note 8] In the roof framing structure described in Supplementary Note 7, the third gradient member is disposed between a first surface of the third connecting member and a second surface of the fourth connecting member facing the first surface. The first surface of the third connecting member is inclined so as to face upward. The second surface of the fourth connecting member is inclined so as to face upward.

[0156] [Supplementary Note 9] In the roof framing structure described in Supplementary Note 1, the first connecting member has a first end and a second end opposite the first end. The second connecting member has a third end and a fourth end opposite the third end. The first end of the first connecting member is connected to the first gradient member via a first metal fitting. The second end of the first connecting member is connected to the first cross member via a second metal fitting. The third end of the second connecting member is connected to the second gradient member via a third metal fitting. The fourth end of the second connecting member is connected to the second cross member via a fourth metal fitting.

[0157] [Supplementary Note 10] In the roof framing structure described in Supplementary Note 9, the first connecting member is disposed between a first hardware surface of the first hardware and a second hardware surface of the second hardware facing the first hardware surface. The first hardware surface of the first hardware is inclined so as to face upward. The second hardware surface of the second hardware is inclined so as to face upward.

[0158] [Supplementary Note 11] In the roof framing structure described in Supplementary Note 10, the second connecting member is disposed between a third hardware surface of the third hardware and a fourth hardware surface of the fourth hardware facing the third hardware surface. The third hardware surface of the third hardware is inclined to face upward. The fourth hardware surface of the fourth hardware is inclined to face upward.

[0159] [Supplementary Note 12] Supplementary Note 12 is a technology related to a building. The building of Supplementary Note 12 includes the roof frame structure according to any one of Supplements 1 to 11.

[0160] 1...building, 4...roof corner, 7A...first roof section, 7B...second roof section, 7X...lower end, 7Y...lower end, 10...roof frame structure, 21...first horizontal member, 22...second horizontal member, 23...third horizontal member, 24...fourth horizontal member, 27...first gradient member, 27A...first end, 27B...second end, 28...second gradient member, 28A...third end, 28B...fourth end, 29...third gradient member, 29A...first end, 29B...second end, 31...first connecting member, 31A...first end, 31B...second end, 32...second connecting member, 32A ...third end, 32B...fourth end, 33...third connecting member, 33A...first end, 33B...second end, 33C...first surface, 34...fourth connecting member, 34A...third end, 34B...fourth end, 34C...second surface, 41...first pillar, 42...second pillar, 43...third pillar, 44...fourth pillar, 51...first metal fitting, 51A...first metal fitting surface, 52...second metal fitting, 52A...second metal fitting surface, 53...third metal fitting, 53A...third metal fitting surface, 54...fourth metal fitting, 54A...fourth metal fitting surface, 62A...upper end, 62B...lower end, 72A...upper end, 72B...lower end.

Claims

1. A roof frame structure which is a framework for a roof corner, the roof corner having a first roof section and a second roof section intersecting the first roof section, comprising: a first cross member along the lower or upper end of the first roof section, a second cross member along the lower or upper end of the second roof section, a first slope member which slopes toward the first cross member and is perpendicular to the first cross member in a plan view, a second slope member which slopes toward the second cross member and is perpendicular to the second cross member in a plan view, a first connecting member which connects the first cross member and the first slope member, and a second connecting member which connects the second cross member and the second slope member.

2. A roof frame structure as described in claim 1, further comprising a first pillar supporting the first slope member, a second pillar supporting the second slope member, and a third pillar positioned at an end of an intersection line where the first roof section and the second roof section intersect, wherein the first slope member is connected to the first pillar and the third pillar, and the second slope member is connected to the second pillar and the third pillar.

3. A roof structure as described in claim 2, further comprising a fourth column arranged near the portion where the first cross member and the second cross member intersect perpendicularly in a plan view, a third cross member arranged parallel to the first cross member, and a fourth cross member arranged parallel to the second cross member, wherein the third cross member is arranged between the first column and the fourth column and connected to the first column and the fourth column, the fourth cross member is arranged between the second column and the fourth column and connected to the second column and the fourth column, the second cross member is arranged between the second gradient member and the third cross member and connected to the second gradient member and the third cross member, or the first cross member is arranged between the first gradient member and the fourth cross member and connected to the first gradient member and the fourth cross member.

4. A roof structure as described in claim 2, further comprising a fourth column arranged at a portion where the first cross member and the second cross member intersect perpendicularly, the first cross member being arranged between the first column and the fourth column and connected to the first column and the fourth column, and the second cross member being arranged between the second column and the fourth column and connected to the second column and the fourth column.

5. A roof frame structure as described in claim 1, further comprising a third connecting member connecting the first cross member and the second cross member, and a fourth connecting member connecting the first slope member and the second slope member.

6. A roof structure as described in claim 5, further comprising a third slope member along the intersection line where a surface along the first roof portion and a surface along the second roof portion intersect.

7. A roof structure as described in claim 6, wherein the third slope member is connected to the third connecting member and the fourth connecting member.

8. A roof frame structure as described in claim 7, wherein the third slope member is disposed between a first surface of the third connecting member and a second surface of the fourth connecting member facing the first surface, the first surface of the third connecting member is inclined so as to face upward, and the second surface of the fourth connecting member is inclined so as to face upward.

9. A roof frame structure as described in claim 1, wherein the first connecting member has a first end and a second end opposite the first end, the second connecting member has a third end and a fourth end opposite the third end, the first end of the first connecting member is connected to the first slope member via a first fitting, the second end of the first connecting member is connected to the first cross member via a second fitting, the third end of the second connecting member is connected to the second slope member via a third fitting, and the fourth end of the second connecting member is connected to the second cross member via a fourth fitting.

10. A roof frame structure as described in claim 9, wherein the first connecting member is disposed between a first fitting surface of the first fitting and a second fitting surface of the second fitting facing the first fitting surface, the first fitting surface of the first fitting is inclined so as to face upward, and the second fitting surface of the second fitting is inclined so as to face upward.

11. A roof frame structure as described in claim 10, wherein the second connecting member is disposed between a third fitting surface of the third fitting and a fourth fitting surface of the fourth fitting facing the third fitting surface, the third fitting surface of the third fitting is inclined so as to face upward, and the fourth fitting surface of the fourth fitting is inclined so as to face upward.

12. A building comprising a roof structure according to any one of claims 1 to 11.

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