CONNECTION STRUCTURE AND ROOF OF BUILDING

Abstract

A connection structure includes a first connection structure connecting a lower end of a first slope beam and a first framework member, the first connection structure including a first metal fitting that comes into contact with a first end surface of the lower end of the first slope beam. The first slope beam and the first framework member are connected by the first metal fitting in such a manner that a lower surface of the first slope beam is positioned higher than an upper surface of the first framework member.

Claims

1. A connection structure, comprising: a first connection structure connecting a lower end of a first sloped beam and a first framework member, wherein the first connection structure includes a first metal bracket contacting a first end surface of the lower end of the first sloped beam, and the first metal bracket connects the first sloped beam and the first framework member so that a lower surface of the first sloped beam is located above an upper surface of the first framework member.

2. The connection structure according to claim 1, wherein the first metal bracket includes a first connection surface contacting the first end surface, and a second connection surface contacting the upper surface of the first framework member and perpendicularly intersecting the first connection surface.

3. The connection structure according to claim 2, wherein the first connection surface includes a first connection portion configured to be inserted into a slit formed in the first end surface.

4. The connection structure according to claim 2, wherein the second connection surface includes a second connection portion configured to be inserted into an insertion hole formed in the upper surface of the first framework member.

5. The connection structure according to claim 1, further comprising: a second connection structure connecting an upper end of the first sloped beam and a second framework member that is arranged parallel to the first framework member, wherein the second connection structure includes a second metal bracket contacting a second end surface of the upper end of the first sloped beam, the second end surface is opposite to the first end surface, and the second connection structure includes a structure in which the first sloped beam is connected to the second framework member by the second metal bracket so that at least part of the second end surface is located above an upper surface of the second framework member.

6. A roof of a building, the roof comprising: the connection structure according to claim 1.

7. A roof of a building, the roof comprising: a first framework member; a second framework member arranged parallel to the first framework member; a first sloped beam connected to the first framework member and the second framework member; and a rafter arranged parallel to the first sloped beam, wherein the first sloped beam is connected to the first framework member and the second framework member so that an upper surface of the first sloped beam is located above a lower surface of the rafter.

8. The roof according to claim 7, wherein the first sloped beam is connected to the first framework member and the second framework member so that the upper surface of the first sloped beam is located at the same height as an upper surface of the rafter.

9. The roof according to claim 7, further comprising: a second sloped beam arranged parallel to the first sloped beam, wherein the second sloped beam is connected to the first framework member and the second framework member so that an upper surface of the second sloped beam is located below an upper surface of the rafter.

10. The roof according to claim 9, further comprising: a verge member arranged crossing the second sloped beam and supported by the second sloped beam.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0019] FIG. 1 is a perspective view of a building in accordance with a first embodiment.

[0020] FIG. 2 is a perspective view of the roof framework of the building shown in FIG. 1.

[0021] FIG. 3 is a plan view of the roof framework shown in FIG. 2.

[0022] FIG. 4 is a cross-sectional view of the roof framework taken along line 4-4 shown in FIG. 3.

[0023] FIG. 5 is a side view of a connection structure in accordance with the first embodiment.

[0024] FIG. 6 is a plan view of the connection structure in accordance with the first embodiment.

[0025] FIG. 7 is a perspective view of a first metal bracket.

[0026] FIG. 8 is a perspective view of a second metal bracket.

[0027] FIG. 9 is a perspective view of a roof framework of a building in accordance with a second embodiment.

[0028] FIG. 10 is a perspective view of a roof framework of a typical building.

[0029] FIG. 11 is a cross-sectional view of the roof framework taken along line 11-11 shown in FIG. 10.

DESCRIPTION OF EMBODIMENTS

First Embodiment

[0030] A connection structure 20 and a roof 1 of a building 2 in accordance with a first embodiment will now be described with reference to FIGS. 1 to 8, 10, and 11.

Building

[0031] The building 2 including the roof 1 will be described with reference to FIG. 1.

[0032] As shown in FIG. 1, the roof 1 is of the building 2. The building 2 includes a piloti 3 that defines a piloti space PS. The piloti space PS is provided under the roof 1. The piloti space PS is provided outdoors of the building 2. In plan view, the piloti space PS includes a space surrounded by a first post 4A, a second post 4B, a third post 4C, and a fourth post 4D. In plan view, the third post 4C and the fourth post 4D are arranged such that a line connecting the third post 4C and the fourth post 4D is parallel to a line connecting the first post 4A and the second post 4B. The piloti 3 may be configured to be a veranda, a terrace, a balcony, or an entrance porch. The application of the piloti 3 is not limited to these examples.

Roof

[0033] The structure of the roof 1 of the building 2 will now be described with reference to FIGS. 2, 3, and 5.

[0034] As shown in FIGS. 2 and 3, the roof 1 includes a first framework member 5, a second framework member 6, first sloped beams 7, and rafters 8. The first framework member 5, the second framework member 6, the first sloped beams 7, and the rafters 8 are made of, for example, lumber. In the present embodiment, the first framework member 5 is a horizontal beam that connects the third post 4C and the fourth post 4D. The second framework member 6 is located at a higher position than the first framework member 5. The second framework member 6 is arranged parallel to the first framework member 5. In the present embodiment, the second framework member 6 is a horizontal beam that connects the first post 4A and the second post 4B.

[0035] The roof 1 is inclined on the building 2. The first framework member 5 is located at a lower side with respect to the inclination of the roof 1. The second framework member 6 is located at an upper side with respect to the inclination of the roof 1. When the roof 1 has a gable roof structure as shown in FIG. 1, the second framework member 6 may correspond to a ridge beam 2A of the building 2. When the roof 1 is configured to be a lean-to roof, the second framework member 6 may correspond to a beam arranged at the part connecting the roof 1 and an outer wall of the building 2.

[0036] Each of the first sloped beams 7 is connected to the first framework member 5 and the second framework member 6. As viewed in a first direction D1, the first sloped beam 7 extends obliquely upward from the first framework member 5 to the second framework member 6. The first direction D1 extends parallel to the first framework member 5. Each of the rafters 8 is arranged parallel to the first sloped beams 7. As viewed in the first direction D1, the rafter 8 is mounted on at least one of the first framework member 5 and the second framework member 6.

[0037] As shown in FIG. 5, the first sloped beam 7 includes a first end surface 9 and a second end surface 10. The first end surface 9 is located at the lower side when the first sloped beam 7 is connected to the first framework member 5. The first end surface 9 faces a lateral direction DH when the first sloped beam 7 is connected to the first framework member 5. The lateral direction DH is orthogonal to the first direction D1 and the vertical direction. The first end surface 9 does not face a side surface of the first framework member 5 when the first sloped beam 7 is connected to the first framework member 5. The second end surface 10 is located at the upper side when the first sloped beam 7 is connected to the second framework member 6. The second end surface 10 is opposite to the first end surface 9. The second end surface 10 faces a direction opposite to the first end surface 9 when the first sloped beam 7 is connected to the second framework member 6. Part of the second end surface 10 faces the second framework member 6 when the first sloped beam 7 is connected to the second framework member 6.

[0038] As shown in FIG. 2, the roof 1 includes a first tie beam 11. The first tie beam 11 is made of, for example, lumber. The first tie beam 11 is connected to side surfaces of the first sloped beams 7 such that an upper surface of the first tie beam 11 is flush with upper surfaces 7A of the first sloped beams 7 and a lower surface of the first tie beam 11 is flush with lower surfaces 7B of the first sloped beams 7. The first tie beam 11 improves the degree of freedom in the structure of the roof 1. The first tie beam 11 may be omitted.

[0039] In an example, the rafters 8 include first rafters 8A and second rafters 8B. Each of the first rafters 8A is mounted across the first framework member 5 and the second framework member 6. Each of the second rafters 8B is mounted across the first framework member 5 and the first tie beam 11, and is not mounted on the second framework member 6. The second rafter 8B may be mounted on the second framework member 6 instead of the first framework member 5.

[0040] As shown in FIG. 5, the roof 1 includes a sheathing roof board 12 and a ceiling member 13. The sheathing roof board 12 is mounted on the upper surface 7A of the first sloped beam 7 and an upper surface 8C of the rafter 8. A roofing material is mounted on an upper surface of the sheathing roof board 12. The ceiling member 13 is arranged under the first sloped beam 7 along a first reference line R1 and forms a lower surface of the roof 1. The first reference line R1 is set in correspondence with the lower surface 7B of the first sloped beam 7. The ceiling member 13 is joined to the first sloped beam 7 so as to form the ceiling of the piloti space PS. The ceiling member 13 includes, for example, a decorative panel.

[0041] FIG. 4 is a cross-sectional view taken along line 4-4 shown in FIG. 3. The first sloped beam 7 is connected to the first framework member 5 and the second framework member 6 so that the upper surface 7A of the first sloped beam 7 is located above a lower surface 8D of the rafter 8. In the present embodiment, the first sloped beam 7 is connected to the first framework member 5 and the second framework member 6 so that the upper surface 7A of the first sloped beam 7 is located at the same height as the upper surface 8C of the rafter 8. As the cross-sectional view of FIG. 4 shows, the upper side of the cross section of the first sloped beam 7 and the upper side of the cross section of the rafter 8 coincides with a hypothetical line R. The hypothetical line R is a line on which the sheathing roof board 12 is arranged. As shown in FIG. 4, a vertical dimension L1 of the first sloped beam 7 is greater than a vertical dimension L2 of the rafter 8.

[0042] As shown in FIG. 4, a dimension L3 of the first sloped beam 7 in the first direction D1 is greater than a dimension LA of the rafter 8 in the first direction D1. In the present embodiment, an edge of the sheathing roof board 12 in the first direction D1 is arranged on the first sloped beam 7. As compared to when the edge of the sheathing roof board 12 is arranged on the rafter 8, the above arrangement readily absorbs a dimensional error of the sheathing roof board 12 in the first direction D1 since the dimension L3 of the first sloped beam 7 is greater than the dimension L4 of the rafter 8. Specifically, the sheathing roof board 12 is arranged such that the edge of the sheathing roof board 12 in the first direction D1 is located on the first sloped beam 7. An overlapping area when the edge of the sheathing roof board 12 is located on the first sloped beam 7 is greater than an overlapping area when the edge of the sheathing roof board 12 is located on the rafter 8. Preferably, the overlapping area when the edge of the sheathing roof board 12 is located on the first sloped beam 7 is relatively large as an area for fastening screws. The arrangement of the edge of the sheathing roof board 12 on the first sloped beam 7 readily ensures the area for fastening screws into the sheathing roof board 12.

[0043] The operation of the roof 1 of the building 2 in accordance with the present embodiment will now be described.

[0044] FIGS. 10 and 11 show the roof framework of a roof 60 in which sloped beams 62 are joined using the typical connection structure. In the typical roof 60, an end surface of a lower end of the sloped beam 62 is connected to a side surface of a framework member 63. Rafters 64 rest on the framework member 63. Thus, at the lower end of the sloped beam 62, the lower surface of the sloped beam 62 is located below an upper surface of the framework member 63, and an upper surface of the sloped beam 62 is located at the same height as a lower surface of the rafter 64. In this manner, in the typical roof 60, the rafter 64 and the sloped beam 62 are significantly displaced from each other in the vertical direction. Therefore, in the typical structure, the thickness of the roof 60 as viewed in a fourth direction D4 cannot be less than the sum of a vertical dimension L5 of the sloped beam 62 and a vertical dimension L6 of the rafter 64. The fourth direction D4 corresponds to the first direction D1 shown in FIG. 2.

[0045] In the roof 1 of the present embodiment, the first sloped beam 7 is connected to the first framework member 5 so that the lower surface 7B of the first sloped beam 7 is located above an upper surface 5A of the first framework member 5 at the lower end of the first sloped beam 7. In turn, the upper surface 7A of the first sloped beam 7 is located above the lower surface 8D of the rafter 8. Thus, as viewed in the first direction D1, at least part of the rafter 8 overlaps the first sloped beam 7. This structure allows the roof 60 to be reduced in thickness than the typical roof 60 by an amount corresponding to the part of the rafter 8 overlapping the first sloped beam 7 in the vertical direction. Further, the upper surface 7A of the first sloped beam 7 may be located at the same height as the upper surface 8C of the rafter 8. In this case, as viewed in the first direction D1, the entire rafter 8 in the vertical direction overlaps the first sloped beam 7. This structure allows the roof 1 to be reduced in thickness than the typical roof 60 by an amount corresponding to the dimension L2 of the rafter 8.

[0046] In the typical roof 60, sheathing roof boards are joined only to the rafters 64. Since the upper surface of the sloped beam 62 is located at the same height as the lower surface of the rafter 64, the typical roof 60 is structured such that the sheathing roof boards cannot be joined to the sloped beams 62. In contrast, in the roof 1 of the present embodiment, the upper surface 7A of the first sloped beam 7 is located at the same height as the upper surface 8C of the rafter 8. This allows the sheathing roof boards 12 to be joined to both the first sloped beams 7 and the rafters 8. The sheathing roof boards 12 may be joined to the first sloped beams 7 that form the roof framework. This improves the rigidity of the roof 1.

Connection Structure

[0047] The connection structure 20 of the first sloped beam 7 will now be described with reference to FIGS. 4 to 6. The connection structure 20 includes a first connection structure 22 that connects the lower end of the first sloped beam 7 and the first framework member 5.

[0048] As shown in FIGS. 5 and 6, in the roof 1, the connection structure 20 offsets the first sloped beam 7 upward with respect to the first framework member 5 and the second framework member 6. When the first sloped beam 7 is offset upward, the first sloped beam 7 is arranged such that a second reference line R2 extends between the upper surface 7A and the lower surface 7B of the first sloped beam 7 as viewed in the first direction D1. The second reference line R2 extends along the lower surface 8D of the rafter 8 as viewed in the first direction D1 when the rafter 8 is mounted across the first framework member 5 and the second framework member 6. In the typical roof 60, such as that shown in FIG. 10, the upper surface of the sloped beam 62 coincides with a line that corresponds to the second reference line R2 as viewed in a direction corresponding to the first direction D1.

[0049] The first connection structure 22 includes a first metal bracket 21. The first connection structure 22 includes a structure in which the lower end of the first sloped beam 7 is connected to the first framework member 5 by the first metal bracket 21. The first metal bracket 21 includes a portion that comes into contact with the first end surface 9 of the lower end of the first sloped beam 7. The first metal bracket 21 supports the first end surface 9 of the lower end of the first sloped beam 7. The first connection structure 22 connects the first sloped beam 7 to the first framework member 5 so that the lower surface 7B of the first sloped beam 7 is located above the upper surface 5A of the first framework member 5. As viewed in the first direction D1, the lower surface 7B of the first sloped beam 7 is separated from the upper surface 5A of the first framework member 5 by a predetermined distance. In the present embodiment, the first connection structure 22 connects the first sloped beam 7 and the first framework member 5 so that the first end surface 9 does not face the first framework member 5.

[0050] The connection structure 20 further includes a second connection structure 24 that connects the upper end of the first sloped beam 7 and the second framework member 6. The connection structure 20 includes a second metal bracket 23. The second connection structure 24 includes a structure in which the first sloped beam 7 is connected to the second framework member 6 by the second metal bracket 23. The second metal bracket 23 includes a portion that comes into contact with the second end surface 10 of the upper end of the first sloped beam 7. The second metal bracket 23 supports the second end surface 10 of the upper end of the first sloped beam 7. The second connection structure 24 connects the first sloped beam 7 to the second framework member 6 so that at least part of the second end surface 10 is located above an upper surface 6A of the second framework member 6 as viewed in the first direction D1. In the present embodiment, the second connection structure 24 connects the first sloped beam 7 and the second framework member 6 so that a lower portion of the second end surface 10 faces a side surface of the second framework member 6 as viewed in the first direction D1.

[0051] The operation of the connection structure 20 in accordance with the present embodiment will now be described.

[0052] In the roof 1 of the present embodiment, the first connection structure 22 positions the lower surface 7B of the first sloped beam 7 above the upper surface 5A of the first framework member 5 at the lower end of the first sloped beam 7. Therefore, the lower end of the first sloped beam 7 is located at a higher position than the lower end of the sloped beam 62 in the typical connection structure. Further, the first connection structure 22 and the second connection structure 24 arrange the first sloped beam 7 at a higher position than the sloped beam 62 in the typical connection structure, from the lower end to the upper end of the first sloped beam 7. As a result, the ceiling member 13 may be located at a relatively high position. This allows the roof 1 to be reduced in thickness compared to that of the typical roof 60.

First Metal Bracket

[0053] The first metal bracket 21 for implementing the first connection structure 22 will now be described with reference to FIGS. 5 to 8. The first metal bracket 21 connects the first sloped beam 7 and the first framework member 5 so that the lower surface 7B of the first sloped beam 7 is located above the upper surface 5A of the first framework member 5.

[0054] As shown in FIG. 7, the first metal bracket 21 includes a first connection surface 25 and a second connection surface 26. The first connection surface 25 is configured to contact the first end surface 9 of the lower end of the first sloped beam 7. The second connection surface 26 is configured to contact the upper surface 5A of the first framework member 5. The second connection surface 26 perpendicularly intersects the first connection surface 25. The second connection surface 26 perpendicularly intersects the first connection surface 25 at the lower end of the first connection surface 25. The first connection surface 25 and the second connection surface 26 are formed to be continuous with each other.

[0055] As shown in FIG. 5, the first metal bracket 21 includes a first main body 27. The first main body 27 is made of iron, stainless steel, or the like. The first main body 27 includes a first portion 27A on which the first connection surface 25 is formed and a second portion 27B on which the second connection surface 26 is formed. The first portion 27A is a plate-shaped member. The second portion 27B is a plate-shaped member. The first portion 27A and the second portion 27B may be formed by bending one plate-shaped member. Alternatively, the first portion 27A and the second portion 27B may be formed by joining two plate-shaped members by welding.

[0056] As shown in FIG. 7, the first metal bracket 21 includes a first support 28A and a second support 28B. The first support 28A and the second support 28B support the first portion 27A such that the first portion 27A is perpendicular to the second portion 27B. The first support 28A and the second support 28B are arranged next to each other in a second direction D2. The second direction D2 extends parallel to the first connection surface 25 and the second connection surface 26. In a state in which the first sloped beam 7 is connected to the first framework member 5 by the first metal bracket 21, the second direction D2 coincides with the first direction D1. The first support 28A and the second support 28B are made of steel, stainless steel, or the like, and are joined to the first main body 27 by welding or the like.

[0057] As shown in FIG. 6, the first metal bracket 21 further includes a first connection portion 29. The first connection portion 29 is formed on the first connection surface 25. The first connection portion 29 is inserted into a slit 9A formed in the first end surface 9 of the lower end of the first sloped beam 7. The first connection portion 29 inserted into the slit 9A restricts movement of the first sloped beam 7 in the first direction D1 with respect to the first metal bracket 21. As shown in FIG. 7, the first connection portion 29 is removably attached to the first portion 27A by bolts and nuts. Since the first connection portion 29 is removable from the first portion 27A, the size and shape of the first connection portion 29 can be selected in accordance with the dimensions of the first sloped beam 7. The first connection portion 29 may be formed integrally with the first portion 27A.

[0058] The first connection portion 29 includes a first connection part 29A and a second connection part 29B. The first connection part 29A and the second connection part 29B are each formed by a plate-shaped member having a thickness-wise direction that coincides with the second direction D2 in a state in which the first sloped beam 7 is connected to the first framework member 5. The first connection part 29A and the second connection part 29B are arranged next to each other with a gap in the second direction D2. The first connection part 29A and the second connection part 29B are formed to extend obliquely upward from the first connection surface 25 along the first sloped beam 7 in a state in which the first sloped beam 7 is connected to the first framework member 5. As long as movement of the first sloped beam 7 with respect to the first metal bracket 21 in a direction parallel to the first framework member 5 is restricted, the first connection portion 29 may include another member in addition to or instead of the first connection part 29A and the second connection part 29B. An example of another member is a shaft member.

[0059] The first connection portion 29 includes a first through hole 30. The first through hole 30 is formed in the first connection part 29A and the second connection part 29B. The first through hole 30 is configured to receive a first support pin 30A in a state in which the first connection portion 29 is inserted into the slit 9A of the lower end of the first sloped beam 7. The first support pin 30A is, for example, a drift pin. In a state in which the first connection portion 29 is inserted into the slit 9A, the first support pin 30A is inserted through the first through hole 30 so as to firmly fasten the first connection portion 29 to the first sloped beam 7. Further, when the first support pin 30A is inserted through a through hole of the first sloped beam 7 and the first through hole 30 of the first connection portion 29, movement of the first sloped beam 7 in the vertical direction with respect to the first metal bracket 21 is restricted.

[0060] The first metal bracket 21 further includes a second connection portion 31. The second connection portion 31 is formed on the second connection surface 26. The second connection portion 31 is inserted into an insertion hole 5B formed in the upper surface 5A of the first framework member 5. The second connection portion 31 includes a first shaft portion 31A. The first shaft portion 31A inserted into the insertion hole 5B restricts movement of the first metal bracket 21 in the horizontal direction with respect to the first framework member 5. The second connection portion 31 may be removably attached to the second portion 27B by a bolt. The second connection portion 31 may be formed integrally with the second portion 27B.

[0061] The second connection portion 31 includes a second through hole 32. The second through hole 32 is formed in the first shaft portion 31A. The second through hole 32 is configured to receive a second support pin 32A in a state in which the second connection portion 31 is inserted into the insertion hole 5B of the first framework member 5. The second support pin 32A is, for example, a drift pin. In a state in which the second connection portion 31 is inserted into the insertion hole 5B of the first framework member 5, the second support pin 32A is inserted through a through hole of the first framework member 5 and the second through hole 32 of the second connection portion 31 so as to firmly fasten the second connection portion 31 to the first framework member 5. The second support pin 32A inserted through the through hole formed in the first framework member 5 and the second through hole 32 of the second connection portion 31 restricts movement of the first metal bracket 21 in the vertical direction with respect to the first framework member 5.

[0062] The operation of the first metal bracket 21 in accordance with the present embodiment will now be described.

[0063] The first metal bracket 21 is arranged on the upper surface 5A of the first framework member 5 and is connected to the first end surface 9 of the first sloped beam 7 so as to connect the first sloped beam 7 and the first framework member 5. The first connection surface 25 extends upward from the second connection surface 26. Thus, in a state in which the first sloped beam 7 is connected to the first framework member 5 by the first metal bracket 21, the first connection surface 25 extends upward from the upper surface 5A of the first framework member 5. In this manner, when the first end surface 9 of the first sloped beam 7 is joined to the first connection surface 25, the first sloped beam 7 is offset upward with respect to the first framework member 5.

[0064] As shown in FIG. 6, the first metal bracket 21 connects the first sloped beam 7 and the first framework member 5 so that the first sloped beam 7 does not overlap the first framework member 5 in the vertical direction. Without the first metal bracket 21, in order to offset-connect the first sloped beam 7 upward with respect to the first framework member 5, the first sloped beam 7 may to be extended in a longitudinal direction so that the first sloped beam 7 overlaps the first framework member 5 in the vertical direction. However, the first metal bracket 21 allows the first sloped beam 7 to be offset-connected upward with respect to the first framework member 5 so that the first sloped beam 7 does not have to be extended. The first metal bracket 21 can form the first connection structure 22 using the sloped beam 62 of the typical roof 60.

Second Metal Bracket

[0065] The second metal bracket 23 for implementing the second connection structure 24 will now be described with reference to FIGS. 5 to 8. The second metal bracket 23 connects the first sloped beam 7 and the second framework member 6 so that at least part of the second end surface 10 is located above the upper surface 6A of the second framework member 6.

[0066] As shown in FIG. 8, the second metal bracket 23 includes a third connection surface 33 and a fourth connection surface 34. The third connection surface 33 is configured to contact the second end surface 10 of the upper end of the first sloped beam 7. The fourth connection surface 34 is configured to contact the upper surface 6A of the second framework member 6. The fourth connection surface 34 perpendicularly intersects the third connection surface 33. The fourth connection surface 34 perpendicularly intersects the third connection surface 33 at the lower end of the third connection surface 33. The third connection surface 33 and the fourth connection surface 34 are formed to be continuous with each other.

[0067] As shown in FIG. 5, the second metal bracket 23 includes a second main body 35. The second main body 35 is made of iron, stainless steel, or the like. The second main body 35 includes a third portion 35A on which the third connection surface 33 is formed and a fourth portion 35B on which the fourth connection surface 34 is formed. The third portion 35A is a plate-shaped member. The fourth portion 35B is a plate-shaped member. The third portion 35A and the fourth portion 35B may be formed by bending one plate-shaped member. Alternatively, the third portion 35A and the fourth portion 35B may be formed by joining two plate-shaped members by welding.

[0068] As shown in FIG. 8, the second metal bracket 23 includes a third support 36A and a fourth support 36B. The third support 36A and the fourth support 36B support the third portion 35A such that the third portion 35A is perpendicular to the fourth portion 35B. The third support 36A and the fourth support 36B are arranged next to each other in a third direction D3. The third direction D3 extends parallel to the third connection surface 33 and the fourth connection surface 34. In a state in which the first sloped beam 7 is connected to the second framework member 6 by the second metal bracket 23, the third direction D3 coincides with the first direction D1. The third support 36A and the fourth support 36B are made of steel, stainless steel, or the like, and are joined to the second main body 35 by welding or the like.

[0069] As shown in FIGS. 5 and 6, the second metal bracket 23 further includes a third connection portion 37. The third connection portion 37 is formed on the third connection surface 33. The third connection portion 37 is inserted into a slit 10A formed in the second end surface 10 of the upper end of the first sloped beam 7. The third connection portion 37 inserted into the slit 10A restricts movement of the first sloped beam 7 in the first direction D1 with respect to the second metal bracket 23. The third connection portion 37 is removably attached to the third portion 35A by bolts and nuts. Since the third connection portion 37 is removable from the third portion 35A, the size and shape of the third connection portion 37 can be selected in accordance with the dimensions of the first sloped beam 7. The third connection portion 37 may be formed integrally with the third portion 35A.

[0070] The third connection portion 37 includes a third connection part 37A and a fourth connection part 37B. The third connection part 37A and the fourth connection part 37B are each formed by a plate-shaped member having a thickness-wise direction that coincides with the third direction D3 in a state in which the first sloped beam 7 is connected to the second framework member 6. The third connection part 37A and the fourth connection part 37B are arranged next to each other with a gap in the third direction D3. The third connection part 37A and the fourth connection part 37B are formed to extend obliquely downward from the third connection surface 33 along the first sloped beam 7 in a state in which the first sloped beam 7 is connected to the second framework member 6. As long as movement of the first sloped beam 7 with respect to the second metal bracket 23 in a direction parallel to the second framework member 6 is restricted, the third connection portion 37 may include another member in addition to or instead of the third connection part 37A and the fourth connection part 37B. An example of another member is a shaft member.

[0071] The third connection portion 37 includes a third through hole 38. The third through hole 38 is formed in the third connection part 37A and the fourth connection part 37B. The third through hole 38 is configured to receive a third support pin 38A in a state in which the third connection portion 37 is inserted into the slit 10A of the upper end of the first sloped beam 7. The third support pin 38A is, for example, a drift pin. In a state in which the third connection portion 37 is inserted into the slit 10A, the third support pin 38A is inserted through the third through hole 38 so as to firmly fasten the third connection portion 37 to the first sloped beam 7. Further, when the third support pin 38A is inserted through a through hole of the first sloped beam 7 and the third through hole 38 of the third connection portion 37, movement of the first sloped beam 7 in the vertical direction with respect to the second metal bracket 23 is restricted.

[0072] The second metal bracket 23 further includes a fourth connection portion 39. The fourth connection portion 39 is formed on the fourth connection surface 34. The fourth connection portion 39 is inserted into an insertion hole 6B formed in the upper surface 6A of the second framework member 6. The fourth connection portion 39 includes a second shaft portion 39A. The second shaft portion 39A inserted into the insertion hole 6B restricts movement of the second metal bracket 23 in the horizontal direction with respect to the second framework member 6. The fourth connection portion 39 may be removably attached to the fourth portion 35B by a bolt. The fourth connection portion 39 may be formed integrally with the fourth portion 35B.

[0073] The fourth connection portion 39 includes a fourth through hole 40. The fourth through hole 40 is formed in the second shaft portion 39A. The fourth through hole 40 is configured to receive a fourth support pin 40A in a state in which the fourth connection portion 39 is inserted into the insertion hole 6B of the second framework member 6. The fourth support pin 40A is, for example, a drift pin. In a state in which the fourth connection portion 39 is inserted into the insertion hole 6B of the second framework member 6, the fourth support pin 40A extends through a through hole of the second framework member 6 and the fourth through hole 40 of the fourth connection portion 39 so as to firmly fasten the fourth connection portion 39 to the second framework member 6. The fourth support pin 40A inserted through the through hole formed in the second framework member 6 and the fourth through hole 40 of the fourth connection portion 39 restricts movement of the second metal bracket 23 in the vertical direction with respect to the second framework member 6.

[0074] As shown in FIGS. 7 and 8, the second connection portion 31 includes a plurality of second through holes 32. The fourth connection portion 39 includes a plurality of fourth through holes 40. The distance between consecutive fourth through holes 40 is equal to the distance between consecutive second through holes 32.

[0075] The operation of the second metal bracket 23 in accordance with the present embodiment will now be described.

[0076] The second metal bracket 23 is arranged on the upper surface 6A of the second framework member 6 and is connected to the second end surface 10 of the first sloped beam 7 so as to connect the first sloped beam 7 and the second framework member 6. The third connection surface 33 extends upward from the fourth connection surface 34. Thus, in a state in which the first sloped beam 7 is connected to the second framework member 6 by the second metal bracket 23, the third connection surface 33 extends upward from the upper surface 6A of the second framework member 6. In this manner, when the second end surface 10 of the first sloped beam 7 is joined to the third connection surface 33, the first sloped beam 7 is offset upward with respect to the second framework member 6.

[0077] As shown in FIG. 6, the second metal bracket 23 connects the first sloped beam 7 to the second framework member 6 so that the first sloped beam 7 does not overlap the second framework member 6 in the vertical direction. Without the second metal bracket 23, in order to offset-connect the first sloped beam 7 upward with respect to the second framework member 6, the first sloped beam 7 may be extended in a longitudinal direction so that the first sloped beam 7 overlaps the second framework member 6 in the vertical direction. However, the second metal bracket 23 allows the first sloped beam 7 to be offset-connected upward with respect to the second framework member 6 so that the first sloped beam 7 does not have to be extended. The second metal bracket 23 can form the second connection structure 24 using the sloped beam 62 of the typical roof 60.

[0078] The present embodiment has the following advantages. [0079] (1-1) The connection structure 20 includes the first connection structure 22 that connects the lower end of the first sloped beam 7 and the first framework member 5. The first connection structure 22 includes the first metal bracket 21 that contacts the first end surface 9 of the lower end of the first sloped beam 7. The first connection structure 22 includes a structure in which the first sloped beam 7 is connected to the first framework member 5 by the first metal bracket 21 so that the lower surface 7B of the first sloped beam 7 is located above the upper surface 5A of the first framework member 5.

[0080] With this structure, the lower surface 7B of the first sloped beam 7 is located above the upper surface 5A of the first framework member 5. This arranges the first sloped beam 7 at a higher position than the sloped beam 62 in the typical connection structure. Since the position of the first sloped beam 7 is raised, the first sloped beam 7 overlaps the rafter 8 as viewed in the first direction D1. Accordingly, the step between the lower surface 7B of the first sloped beam 7 and the lower surface 8D of the rafter 8 is smaller than the step between the lower surface of the sloped beam 62 and the lower surface of the rafter 64 of the typical roof 60. This allows the roof 1 to be reduced in thickness, in other words, the roof 1 can be made thinner. Consequently, the aesthetic appeal of the ceiling may be improved as compared with the typical roof 60. [0081] (1-2) The first metal bracket 21 includes the first connection surface 25 that contacts the first end surface 9 of the first sloped beam 7, and the second connection surface 26 that contacts the upper surface 5A of the first framework member 5 and perpendicularly intersects the first connection surface 25. With this structure, the first metal bracket 21 contacts the first sloped beam 7 and the first framework member 5, thereby ensuring the connection of the first sloped beam 7 and the first framework member 5 by the first metal bracket 21. [0082] (1-3) The first connection surface 25 includes the first connection portion 29 configured to be inserted into the slit 9A formed in the first end surface 9 of the first sloped beam 7. With this structure, the first connection portion 29 inserted into the slit 9A restricts movement of the first sloped beam 7 with respect to the first metal bracket 21. Accordingly, the first sloped beam 7 and the first framework member 5 are connected to each other in a correct positional relationship. [0083] (1-4) The second connection surface 26 includes the second connection portion 31 configured to be inserted into the insertion hole 5B formed in the upper surface 5A of the first framework member 5. With this structure, the second connection portion 31 inserted into the insertion hole 5B restricts movement of the first metal bracket 21 with respect to the first framework member 5. Accordingly, the first sloped beam 7 and the first framework member 5 are connected to each other in a correct positional relationship. [0084] (1-5) The connection structure 20 further includes the second connection structure 24 that connects the upper end of the first sloped beam 7 and the second framework member 6. The second connection structure 24 includes the second metal bracket 23 that contacts the second end surface 10 of the upper end of the first sloped beam 7. The second metal bracket 23 connects the first sloped beam 7 and the second framework member 6 so that at least part of the second end surface 10 is located above the upper surface 6A of the second framework member 6 that is parallel to the first framework member 5.

[0085] With this structure, the first connection structure 22 and the second connection structure 24 arrange the first sloped beam 7 at a higher position than the sloped beam 62 in the typical connection structure, from the upper end to the lower end of the first sloped beam 7. This allows the structure of the roof 1 to be made thinner. [0086] (1-6) The roof 1 of the building 2 includes the connection structure 20. With this structure, the first sloped beam 7 is located at a higher position than the sloped beam 62 of the typical connection structure. This allows the structure of the roof 1 to be made thinner. Further, the ceiling member 13 may be located at a higher position than the typical roof 60. This improves the aesthetic appeal of the ceiling as compared with the typical roof 60. [0087] (1-7) The roof 1 of the building 2 includes the first framework member 5, the second framework member 6 arranged parallel to the first framework member 5, the first sloped beam 7 connected to the first framework member 5 and the second framework member 6, and the rafter 8 arranged parallel to the first sloped beam 7. The first sloped beam 7 is connected to the first framework member 5 and the second framework member 6 so that the upper surface 7A of the first sloped beam 7 is located above the lower surface 8D of the rafter 8.

[0088] With this structure, the first sloped beam 7 is arranged so that the upper surface 7A of the first sloped beam 7 is located above the lower surface 8D of the rafter 8. Therefore, at least part of the rafter 8 overlaps the first sloped beam 7 when the first sloped beam 7 and the rafter 8 are viewed in the first direction D1 extending parallel to the first framework member 5. This allows for a reduction in the thickness of the roof 1 resulting from the first sloped beam 7 and the rafter 8. Consequently, the structure of the roof 1 may be made thinner. [0089] (1-8) The first sloped beam 7 is connected to the first framework member 5 and the second framework member 6 so that the upper surface 7A of the first sloped beam 7 is located at the same height as the upper surface 8C of the rafter 8. With this structure, when the vertical dimension L1 of the first sloped beam 7 is greater than the vertical dimension L2 of the rafter 8, the entire rafter 8 overlaps the first sloped beam 7 in the vertical direction as viewed in the first direction D1 extending parallel to the first framework member 5. This allows for a reduction in the thickness of the roof 1 resulting from the dimension of the first sloped beam 7 and the dimension of the rafter 8. Consequently, the structure of the roof 1 may be made thinner.

[0090] Further, this structure allows the sheathing roof board 12 to be joined to both the first sloped beam 7 and the rafter 8. Joining the sheathing roof board 12 to the first sloped beam 7 improves the rigidity of the roof 1. When the rigidity of the roof 1 is improved, structures for improving the rigidity of the building 2 may be reduced as compared with the typical building 61, thereby increasing the degree of freedom in the structure of the building 2. The structures for improving the rigidity of the building 2 include, for example, a load-bearing wall, a diagonal brace, or the like.

Second Embodiment

[0091] A roof 1 of a building 2 in accordance with a second embodiment will now be described with reference to FIG. 9. In the roof 1 of the building 2 of the present embodiment, same reference numerals are given to those components that are the same as the corresponding components of the first embodiment. Such components will not be described in detail.

Roof

[0092] The roof 1 further includes a second sloped beam 50 arranged parallel to the first sloped beam 7. The second sloped beam 50 is made of, for example, lumber. The second sloped beam 50 has the same dimensions as the first sloped beam 7. The second sloped beam 50 may have different dimensions from the first sloped beam 7. The second sloped beam 50 is arranged so that an upper surface 50A of the second sloped beam 50 is located below the upper surface 7A of the first sloped beam 7. The second sloped beam 50 is connected to the first framework member 5 and the second framework member 6 so that an upper portion of the second sloped beam 50 overlaps the first sloped beam 7 as viewed in the first direction D1.

[0093] The second sloped beam 50 is connected to the first framework member 5 so that an end surface of a lower end of the second sloped beam 50 is in contact with a side surface of the first framework member 5. The second sloped beam 50 is connected to the second framework member 6 so that an end surface of an upper end of the second sloped beam 50 is in contact with a side surface of the second framework member 6. The second sloped beam 50 is connected to the first framework member 5 and the second framework member 6 so that the upper surface 50A of the second sloped beam 50 is located below the upper surface 8C of the rafter 8. The second sloped beam 50 is arranged so that upper surface 50A of the second sloped beam 50 coincides with the second reference line R2 as viewed in the first direction D1.

[0094] The roof 1 includes a second tie beam 51 and additional rafters 52. The second tie beam 51 and the additional rafters 52 are made of, for example, lumber. The second tie beam 51 includes a first end that is connected to a side surface of the second sloped beam 50 so that an upper surface of the second tie beam 51 is flush with the upper surface 50A of the second sloped beam 50. The second tie beam 51 includes a second end that is connected to a sloped beam arranged below the first sloped beam 7 so that the upper surface of the second tie beam 51 is located below the upper surface 7A of the first sloped beam 7. The sloped beam arranged below the first sloped beam 7 is, for example, a sloped beam of the typical connection structure. When the roof 1 is viewed from above, each of the additional rafters 52 is arranged between the first sloped beam 7 and the second sloped beam 50 in the first direction D1. The additional rafter 52 is arranged so that an upper surface of the additional rafter 52 is flush with the upper surface 8C of the rafter 8. The additional rafter 52 is fastened to the first framework member 5, the second framework member 6, and the second tie beam 51 by screws or the like.

[0095] The roof 1 further includes verge members 53 arranged crossing the second sloped beam 50. Each of the verge members 53 is supported by the second sloped beam 50. The verge member 53 is arranged on the second sloped beam 50. The verge member 53 is made of, for example, lumber. The verge member 53 forms a verge 54 of the building 2. The verge member 53 includes, for example, a cantilever beam 53A having an end connected to the additional rafter 52. The verge member 53 is connected to the additional rafter 52 so that a lower surface of the verge member 53 is located at the same height as the lower surface 7B of the first sloped beam 7. The verge member 53 is connected to the additional rafter 52 so that an upper surface of the verge member 53 is flush with the upper surface of the additional rafter 52. The term verge refers to a portion of a gable roof or a shed roof that protrudes from an outer wall of a building and has an end surface extending obliquely with respect to the ground in side view.

[0096] The operation of the roof 1 in accordance with the present embodiment will now be described.

[0097] The building 2 of the present embodiment further includes the second sloped beam 50 in addition to the first sloped beam 7. Since the second sloped beam 50 supports the verge member 53, a relatively large verge 54 can be formed. With the second sloped beam 50, the building 2 may have a relatively thin ceiling structure formed by the first sloped beam 7 and a relatively large verge 54 formed by the second sloped beam 50.

[0098] The present embodiment has the following advantages. [0099] (2-1) The second sloped beam 50 arranged parallel to the first sloped beam 7 is further provided. The second sloped beam 50 is connected to the first framework member 5 and the second framework member 6 so that the upper surface 50A of the second sloped beam 50 is located below the upper surface 8C of the rafter 8.

[0100] With this structure, the roof 1 includes the second sloped beam 50 that is arranged in a different manner from the first sloped beam 7. This allows one portion of the roof 1 to be made thinner and another portion to remain without being made thinner. In addition, the roof 1 including the second sloped beam 50 that is arranged in a different manner from the first sloped beam 7 increases the degree of freedom in the structure of the roof 1. For example, instead of or in addition to the sloped beam 62, the first sloped beam 7 can be added to the typical roof 60. In this case, the second sloped beam 50 will not be arranged in a portion corresponding to the first sloped beam 7. This allows the structure of the roof 1 to be made thinner. Further, joining the sheathing roof board 12 to the first sloped beam 7 increases the rigidity as compared with the typical roof 60. [0101] (2-2) The verge member 53 crossing the second sloped beam 50 is further provided. The verge member 53 is supported by the second sloped beam 50. With this structure, the verge member 53 is supported by the second sloped beam 50 so that the verge 54 may be increased in size. Further, the relatively large verge 54 may improve the aesthetic appeal of the roof 1.

Modified Examples

[0102] The above embodiments exemplify, without any intention to limit, applicable forms of the connection structure 20 and the roof 1 of the building 2. The connection structure 20 and the roof 1 of the building 2 may take forms different from the those illustrated in the above embodiments. For example, the structure in the above embodiments may be replaced, changed, or omitted in part or include an additional element. Modified examples of the above embodiments will now be described below. [0103] (1) The roof 1 including the connection structure 20 does not have to be a roof arranged above the piloti 3. The roof 1 including the connection structure 20 may be, for example, a roof arranged on a room of the building 2. [0104] (2) The first framework member 5 may be a post. The post includes the third post 4C or the fourth post 4D. The first connection structure 22 may have a structure in which the first sloped beam 7 is connected to a post by the first metal bracket 21 so that the lower surface 7B of the first sloped beam 7 is located above an upper surface of the post. [0105] (3) The first sloped beam 7 may be connected to the first framework member 5 and the second framework member 6 so that the upper surface 7A of the first sloped beam 7 is located below the upper surface 8C of the rafters 8. Even in this case, as long as the upper surface 7A of the first sloped beam 7 is located above the lower surface 8D of the rafter 8, the lower surface 7B of the first sloped beam 7 will be located at a relatively high position. This allows the structure of the roof 1 to be made thinner than that of the typical roof 60. [0106] (4) The first sloped beam 7 may be arranged so that the lower surface 7B of the first sloped beam 7 is at the same height as the lower surface 8D of the rafter 8. Even in this case, the lower surface 7B of the first sloped beam 7 is located at a relatively high position. This allows the structure of the roof 1 to be made thinner than that of the typical roof 60. [0107] (5) The shape of the first metal bracket 21 is not limited as long as the first metal bracket 21 includes the first connection surface 25 and the second connection surface 26. For example, the first metal bracket 21 may be cube-shaped, box-shaped, or the like and include the first connection surface 25 and the second connection surface 26. [0108] (6) The shape of the second metal bracket 23 is not limited as long as the second metal bracket 23 includes the third connection surface 33 and the fourth connection surface 34. For example, the second metal bracket 23 may be cube-shaped, box-shaped, or the like and includes the third connection surface 33 and the fourth connection surface 34. [0109] (7) The second connection structure 24 may connect the first sloped beam 7 and the second framework member 6 so that the first sloped beam 7 overlaps the second framework member 6 in plan view. In this case, the second connection structure 24 may connect the first sloped beam 7 to the second framework member 6 so that the lower surface 7B of the first sloped beam 7 is located above the upper surface 6A of the second framework member 6.

[0110] The present specification discloses the following techniques.

Clause 1

[0111] A connection structure including a first connection structure connecting a lower end of a first sloped beam and a first framework member, in which the first connection structure includes a first metal bracket contacting a first end surface of the lower end of the first sloped beam, and the first metal bracket connects the first sloped beam and the first framework member so that a lower surface of the first sloped beam is located above an upper surface of the first framework member.

Clause 2

[0112] The connection structure according to clause 1, in which the first metal bracket includes a first connection surface contacting the first end surface, and a second connection surface contacting the upper surface of the first framework member and perpendicularly intersecting the first connection surface.

Clause 3

[0113] The connection structure according to clause 2, in which the first connection surface includes a first connection portion configured to be inserted into a slit formed in the first end surface.

Clause 4

[0114] The connection structure according to clause 2 or 3, in which the second connection surface includes a second connection portion configured to be inserted into an insertion hole formed in the upper surface of the first framework member.

Clause 5

[0115] The connection structure according to any one of clauses 1 to 4, further including a second connection structure connecting an upper end of the first sloped beam and a second framework member that is arranged parallel to the first framework member, in which the second connection structure includes a second metal bracket contacting a second end surface of the upper end of the first sloped beam, the second end surface is opposite to the first end surface, and the second connection structure includes a structure in which the first sloped beam is connected to the second framework member by the second metal bracket so that at least part of the second end surface is located above an upper surface of the second framework member.

Clause 6

[0116] A roof of a building, the roof including the connection structure according to any one of clauses 1 to 5.

Clause 7

[0117] A roof of a building, the roof including a first framework member, a second framework member arranged parallel to the first framework member, a first sloped beam connected to the first framework member and the second framework member, and a rafter arranged parallel to the first sloped beam, in which the first sloped beam is connected to the first framework member and the second framework member so that an upper surface of the first sloped beam is located above a lower surface of the rafter.

Clause 8

[0118] The roof according to clause 7, in which the first sloped beam is connected to the first framework member and the second framework member so that the upper surface of the first sloped beam is located at the same height as an upper surface of the rafter.

Clause 9

[0119] The roof according to clause 7 or 8, further including a second sloped beam arranged parallel to the first sloped beam, in which the second sloped beam is connected to the first framework member and the second framework member so that an upper surface of the second sloped beam is located below an upper surface of the rafter.

Clause 10

[0120] The roof according to clause 9, further including a verge member arranged crossing the second sloped beam and supported by the second sloped beam.

[0121] It should be understood that the above-described disclosure may be embodied in many other specific forms within the scope and equivalence of the present disclosure described in the appended claims.

[0122] In the present disclosure, at least one of A and B should be understood to mean only A, only B, or both A and B.

REFERENCE SIGNS LIST

[0123] 1) roof, 2) building, 5) first framework member, 6) second framework member, 7) first sloped beam, 8) rafter, 9) first end surface, 9A) slit, 10) second end surface, 10A) slit, 20) connection structure, 21) first metal bracket, 22) first connection structure, 23) second metal bracket, 24) second connection structure, 25) first connection surface, 26) second connection surface, 29) first connection portion, 31) second connection portion, 50) second sloped beam, 53) verge member.