Building

Abstract

To provide a building capable of improving the aesthetics of a ceiling.SOLUTION: A ceiling 20 has a first plane 21, a second plane 22, and a connecting surface 23 connecting the first plane 21 and the second plane 22. The first plane 21 is inclined so as to increase in height as it approaches the second plane 22 in the first direction. The second plane 22 is inclined so as to increase in height as it approaches the first plane 21 in the first direction. The connecting surface 23 is smoothly connected to the upper end of the first plane 21 and the upper end of the second plane 22. The connecting surface 23 is a curved surface curved upward. A connecting surface portion 20c including the connecting surface 23 includes a plurality of third bases 35 and a third ceiling panel 36. A third lower surface 35a of the third base 35 is a curved surface curved upward. The third bases 35 are arranged side by side in the second direction. The third ceiling panel 36 is disposed along the third lower surface 35a of the third base 35.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a building.

Background Art

[0002] A building includes a room having an indoor space covered by a ceiling. The ceiling described in Patent Document 1 has a first plane and a second plane. The first plane is inclined such that its height increases as it approaches the second plane in the direction in which the first plane and the second plane are arranged in plan view. The second plane is inclined such that its height increases as it approaches the first plane in the direction in which the first plane and the second plane are arranged in plan view. The ceiling further has a connecting surface that connects the first plane and the second plane. The connecting surface is a plane extending along the horizontal direction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In such a ceiling, at the boundary between the first plane and the connecting surface and at the boundary between the second plane and the connecting surface, the gradient of the ceiling changes discontinuously, thereby impairing the aesthetic appearance of the ceiling.

Means for Solving the Problems

[0005] (1) The building that solves the above problems includes a room having an indoor space covered by a ceiling. The ceiling has a first plane and a second plane. When the direction in which the first plane and the second plane are arranged side by side in plan view is defined as the first direction, the first plane is inclined such that its height increases as it approaches the second plane in the first direction, and the second plane is inclined such that its height increases as it approaches the first plane in the first direction. The ceiling further has a connecting surface that connects the first plane and the second plane. The connecting surface is a curved surface that smoothly connects to the upper ends of the first plane and the second plane respectively and curves upward. The first plane portion including the first plane is a plane that is inclined such that the height of the first lower surface increases as it approaches the second plane in the first direction and is composed of a plurality of first bases arranged side by side in a second direction orthogonal to the first direction in plan view, and a first ceiling panel arranged along the first lower surface. The second plane portion including the second plane is a plane that is inclined such that the height of the second lower surface increases as it approaches the first plane in the first direction and is composed of a plurality of second bases arranged side by side in the second direction, and a second ceiling panel arranged along the second lower surface. The connecting surface portion including the connecting surface is a curved surface whose third lower surface curves upward and is composed of a plurality of third bases arranged side by side in the second direction, and a third ceiling panel arranged along the third lower surface.

[0006] According to this configuration, the connecting surface smoothly connects to the upper ends of the first plane and the second plane respectively. Also, the connecting surface is a curved surface that curves upward. For this reason, the gradient of the ceiling continuously changes in the first direction. Therefore, the aesthetics of the ceiling can be improved. Also, since no corners are formed on the ceiling due to the connection of the planes, the ceiling gives a soft impression. Therefore, the indoor space becomes a space with a sense of being enclosed. Furthermore, the light in the indoor space can spread smoothly along the ceiling.

[0007] Further, according to the above configuration, the connection surface portion is composed of a plurality of third bases and third ceiling panels. The third lower surface of the third base is a curved surface that curves upward. The plurality of third bases are arranged side by side in the second direction. The third ceiling panel is arranged along the third lower surface of the third base. Thereby, without preparing a curved third ceiling panel, by arranging the third ceiling panel along the third lower surface of the third base, a highly accurate curved surface can be formed.

[0008] (2) In the building of (1) above, it includes a girder extending in the second direction, and each of the plurality of third bases is arranged such that the apex of the third lower surface overlaps with the girder in the vertical direction.

[0009] According to this configuration, the girder extends along the second direction. Therefore, by arranging the third bases side by side in the direction in which the girder extends with the girder as a guide, the third bases are arranged side by side in the second direction. Thus, the arrangement work of the third bases becomes easy.

[0010] Also, each third base is arranged such that the apex of the third lower surface overlaps with the girder in the vertical direction. Thereby, the plurality of third bases are arranged such that the apexes of the third lower surfaces are aligned in a straight line. Therefore, the displacement of the third base in the first direction can be suppressed.

[0011] (3) In the building of (2) above, the upper end portions of the first base and the second base each extend toward the girder and are connected to the girder. In the second direction, the first base, the second base, and the third base are arranged at the same position, and the third base is in contact with the first lower surface and the second lower surface. According to this configuration, the third base can be stably arranged.

[0012] (4) In any one of the buildings of (1) to (3) above, a plaster material layer is provided on the lower surfaces of the first ceiling panel, the second ceiling panel, and the third ceiling panel.

[0013] According to this configuration, since the boundaries between the first ceiling panel and the third ceiling panel and between the second ceiling panel and the third ceiling panel are covered by the plastering material layer, the aesthetics of the ceiling are further improved.

[0014] (5) In any one of the buildings (1) to (4) above, the connection surface is arcuate in a side view seen from the second direction. According to this configuration, the aesthetics of the ceiling are further improved.

[0015] (6) In any one of the buildings (1) to (5) above, it includes a wall portion extending along the first direction, the second plane has a main body portion located above the lower end of the first plane and an extension portion located below the lower end of the first plane, the wall portion is located below the first plane, the connection surface, and the main body portion of the second plane, and the indoor space has a first region located below the first plane, the connection surface, and the main body portion of the second plane, and a second region located below the extension portion of the second plane.

[0016] According to this configuration, the ceiling has an asymmetrical shape with respect to the apex of the ceiling in the first direction. Therefore, the entire indoor space is an asymmetrical space with respect to the apex of the ceiling in the first direction. On the other hand, the first region is a region symmetrical with respect to the apex of the ceiling in the first direction. By providing the wall portion in the first region, the wall portion has a symmetrical shape with respect to the apex of the ceiling in the first direction, so when the indoor space is viewed from the second direction, it is emphasized that the first region is a symmetrical region. By providing a symmetrical and neat region in such an asymmetrical indoor space, the design of the indoor space is improved.

[0017] Also, since the height of the ceiling in the second region is lower than the height of the ceiling in the first region, a person in the indoor space is likely to feel a sense of openness when moving from the second region to the first region.

Advantages of the Invention

[0018] According to the building of the present invention, the aesthetics of the ceiling can be improved.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0020] Referring to FIGS. 1 to 4, the building 10 of the present embodiment will be described. The building 10 of the present embodiment is a two-story detached house. The building 10 is provided with a pitched roof 10b. The pitched roof 10b has a roof body. The roof body is composed of a pitched beam (not shown) and a ridge beam 12 that supports the pitched beam. The building 10 has a ceiling 20 provided along the pitch of the pitched roof 10b.

[0021] As shown in FIG. 1, the building 10 is provided with a room 10a having an indoor space 11. The indoor space 11 is provided on the second floor of the building 10. The indoor space 11 is covered by the ceiling 20.

[0022] <Ceiling> As shown in FIG. 2, the room 10a has a ceiling 20. The indoor space 11 is provided below the ceiling 20. The ceiling 20 has a first plane 21 and a second plane 22. In the following description, the direction in which the first plane 21 and the second plane 22 are arranged in plan view is defined as the first direction. The first plane 21 is inclined so that its height increases as it approaches the second plane 22 in the first direction. The second plane 22 is inclined so that its height increases as it approaches the first plane 21 in the first direction. That is, the first plane 21 and the second plane 22 are each inclined so as to approach each other as they go upward. The inclination angle of the first plane 21 with respect to the vertical direction is the same as the inclination angle of the second plane 22 with respect to the vertical direction. Also, the direction orthogonal to the first direction is defined as the second direction. In the present embodiment, the ridge beam 12 extends along the second direction (see FIG. 3).

[0023] The ceiling 20 further has a connection surface 23 that connects the first plane 21 and the second plane 22. The connection surface 23 is smoothly connected to each of the upper end of the first plane 21 and the upper end of the second plane 22. The connection surface 23 is a curved surface that curves upward. The connection surface 23 of the present embodiment is arc-shaped in a side view seen from the second direction. The apex 200 of the ceiling 20 is constituted by the apex of the connection surface 23.

[0024] In the present embodiment, the second plane 22 is longer than the first plane 21. The second plane 22 has a main body portion 22a located above the lower end 21a of the first plane 21 and an extension portion 22b located below the lower end 21a of the first plane 21. Therefore, the ceiling 20 of the present embodiment has an asymmetric shape with respect to the apex 200 of the ceiling 20 in the first direction. Specifically, the ceiling 20 is asymmetric with respect to the vertical line passing through the apex 200.

[0025] As shown in FIG. 3, the first plane portion 20a including the first plane 21 is constituted by a plurality of first bases 31 and a plurality of first ceiling panels 32. The first base 31 of the present embodiment is constituted by a runner extending linearly. The first ceiling panel 32 of the present embodiment is constituted by a gypsum board.

[0026] The first lower surface 31a of the first base 31 is a plane that slopes so that its height increases as it approaches the second plane 22 in the first direction. The first base 31 of the present embodiment extends to the ridge beam 12. The upper end portion of the first base 31 is connected to the ridge beam 12.

[0027] As shown by the dashed-dotted line in FIG. 4, a plurality of first bases 31 are arranged side by side in the second direction. In the present embodiment, the first bases 31 are arranged side by side in the direction in which the ridge beam 12 extends.

[0028] As shown in FIG. 3, the first ceiling panel 32 is arranged along the first lower surface 31a of the first base 31. Therefore, the first ceiling panel 32 slopes so that its height increases as it approaches the second plane 22 in the first direction. Note that the first ceiling panel 32 is not arranged at the portion of the first lower surface 31a of the first base 31 that contacts the third base 35 described later. In the present embodiment, the width of the first ceiling panel 32 in the second direction is approximately twice the interval between the first bases 31 in the second direction. Both end portions and the central portion of the first ceiling panel 32 in the second direction overlap the first base 31 in the vertical direction.

[0029] The second plane portion 20b including the second plane 22 is composed of a plurality of second bases 33 and a plurality of second ceiling panels 34. The second base 33 of the present embodiment is composed of a runner that extends linearly. The second ceiling panel 34 of the present embodiment is composed of a gypsum board.

[0030] The second lower surface 33a of the second base 33 is a plane that slopes so that its height increases as it approaches the first plane 21 in the first direction. The second base 33 of the present embodiment extends to the ridge beam 12. The upper end portion of the second base 33 is connected to the ridge beam 12.

[0031] As shown by the dashed-dotted line in FIG. 4, a plurality of second bases 33 are arranged side by side in the second direction. In the present embodiment, the second bases 33 are arranged side by side in the direction in which the ridge beam 12 extends. The interval at which the second bases 33 are arranged in the second direction is the same as the interval at which the first bases 31 are arranged in the second direction. The first bases 31 and the second bases 33 are arranged at the same position in the second direction.

[0032] As shown in FIG. 3, the second ceiling panel 34 is arranged along the second lower surface 33a of the second base 33. Therefore, the second ceiling panel 34 is inclined so that its height increases as it approaches the first plane 21 in the first direction. Note that the second ceiling panel 34 is not arranged at the portion of the second lower surface 33a of the second base 33 that comes into contact with the third base 35 described later. In the present embodiment, the width of the second ceiling panel 34 in the second direction is approximately twice the interval between the second bases 33 in the second direction. Both end portions and the central portion of the second ceiling panel 34 in the second direction overlap the second bases 33 in the vertical direction.

[0033] The connection surface portion 20c including the connection surface 23 is composed of a plurality of third bases 35 and a plurality of third ceiling panels 36. The third base 35 of the present embodiment is composed of a wooden or metal member. The third base 35 of the present embodiment is substantially triangular. The third lower surface 35a of the third base 35 is a curved surface that curves upward. The third ceiling panel 36 of the present embodiment is composed of a gypsum board. The gypsum board constituting the third ceiling panel 36 has flexibility.

[0034] As shown by the broken line in FIG. 4, a plurality of third bases 35 are arranged side by side in the second direction. In the present embodiment, the third bases 35 are arranged side by side in the direction in which the ridge beam 12 extends. The interval at which the third bases 35 are arranged in the second direction is approximately half of the interval at which the first bases 31 and the second bases 33 are arranged in the second direction. The third bases 35 are arranged at the same position as the first bases 31 and the second bases 33 in the second direction.

[0035] As shown in FIG. 3, the third base layer 35 is located below the first base layer 31 and the second base layer 33. The third base layer 35 is in contact with a part of the first lower surface 31a of the first base layer 31 and a part of the second lower surface 33a of the second base layer 33. A plurality of grooves 12b are provided on the lower surface 12a of the ridge beam 12. Each groove 12b extends along the first direction. The plurality of grooves 12b are arranged at intervals in the direction in which the ridge beam 12 extends, that is, the second direction. The third base layer 35 is inserted into the groove 12b of the ridge beam 12. The third base layer 35 is connected to the ridge beam 12. In the present embodiment, the third lower surface 35a of the third base layer 35 is located below the lower surface 12a of the ridge beam 12.

[0036] In the present embodiment, the plurality of third base layers 35 are respectively arranged such that the vertices of the third lower surface 35a overlap the ridge beam 12 in the vertical direction. Therefore, the plurality of third base layers 35 are arranged such that the vertices of the third lower surface 35a are aligned in a straight line.

[0037] The third ceiling panel 36 is arranged along the third lower surface 35a of the third base layer 35. Therefore, the third ceiling panel 36 is curved upward. As shown in FIG. 4, in the present embodiment, the width of the third ceiling panel 36 in the second direction is substantially the same as the interval between the third base layers 35 in the second direction. Both ends of the third ceiling panel 36 in the second direction overlap the third base layer 35 in the vertical direction.

[0038] As shown in FIG. 3, in the present embodiment, a plaster material layer 37 is provided on the lower surface of the first ceiling panel 32, the lower surface of the second ceiling panel 34, and the lower surface of the third ceiling panel 36. In addition, in FIG. 4, the illustration of the plaster material layer 37 is omitted.

[0039] <The first region and the second region> As shown in FIGS. 1 and 2, the indoor space 11 has a first region 11a and a second region 11b. In this embodiment, the first region 11a is used as a bedroom. The second region 11b is used as a passage adjacent to the bedroom. The first region 11a is located below the main body 22a of the first plane 21, the connection surface 23, and the second plane 22 among the ceilings 20. Therefore, the first region 11a is a region symmetric with respect to the apex 200 of the ceiling 20 in the first direction. Specifically, the first region 11a is symmetric with respect to the vertical line passing through the apex 200. The second region 11b is located below the extension 22b of the second plane 22 among the ceilings 20. The second region 11b is arranged side by side with the first region 11a in the first direction.

[0040] <Wall portion> The building 10 includes a partition wall 13 as a wall portion. The partition wall 13 extends along the first direction. The partition wall 13 partitions the indoor space 11 in the second direction. The partition wall 13 is provided below the main body 22a of the first plane 21, the connection surface 23, and the second plane 22. The partition wall 13 is not provided below the extension 22b of the second plane 22. Therefore, the partition wall 13 has a shape symmetric with respect to the apex 200 of the ceiling 20 in the first direction. Specifically, the partition wall 13 is symmetric with respect to the vertical line passing through the apex 200. The partition wall 13 is arranged side by side with the first region 11a in the second direction.

[0041] The building 10 includes a first wall portion 14 that is located on the first plane 21 side in the first direction and extends along the second direction. In this embodiment, the first wall portion 14 constitutes an outer wall on the first plane 21 side in the first direction. A window 14a is provided at the upper part of the first wall portion 14.

[0042] The building 10 includes a second wall portion 15 that is located on the second plane 22 side in the first direction and extends along the second direction. In this embodiment, the second wall portion 15 constitutes an outer wall on the second plane 22 side in the first direction.

[0043] [Operation of this embodiment] The operation of this embodiment will be described. The ceiling 20 has a first plane 21, a second plane 22, and a connecting surface 23 that connects the first plane 21 and the second plane 22. The first plane 21 is inclined such that its height increases as it approaches the second plane 22 in the first direction. The second plane 22 is inclined such that its height increases as it approaches the first plane 21 in the first direction. The connecting surface 23 smoothly connects to the upper end of each of the first plane 21 and the second plane 22. The connecting surface 23 is curved upward.

[0044] According to this configuration, the gradient of the ceiling 20 continuously changes in the first direction. Therefore, the aesthetics of the ceiling 20 can be improved. Also, since no corners are formed on the ceiling 20 due to the connection of the planes, the ceiling 20 gives a soft impression. Therefore, the interior space 11 becomes a space with a sense of being enclosed. Furthermore, the light in the interior space 11 can spread smoothly along the ceiling 20. Depending on the light entering the interior space 11 from the window 14a, a shadow gradient is formed on the ceiling 20.

[0045] The first plane portion 20a including the first plane 21 is composed of a plurality of first bases 31 and a first ceiling panel 32. The first lower surface 31a of the first base 31 is a plane that is inclined such that its height increases as it approaches the second plane 22 in the first direction. The plurality of first bases 31 are arranged side by side in the second direction. The first ceiling panel 32 is arranged along the first lower surface 31a of the first base 31.

[0046] The second plane portion 20b including the second plane 22 is composed of a plurality of second bases 33 and a second ceiling panel 34. The second lower surface 33a of the second base 33 is a plane that is inclined such that its height increases as it approaches the first plane 21 in the first direction. The plurality of second bases 33 are arranged side by side in the second direction. The second ceiling panel 34 is arranged along the second lower surface 33a of the second base 33.

[0047] The connection surface portion 20c including the connection surface 23 is composed of a plurality of third bases 35 and a third ceiling panel 36. The third lower surface 35a of the third base 35 is a curved surface that curves upward. The plurality of third bases 35 are arranged side by side in the second direction. The third ceiling panel 36 is arranged along the third lower surface 35a of the third base 35.

[0048] According to this configuration, without preparing the curved third ceiling panel 36, by arranging the third ceiling panel 36 along the third lower surface 35a of the third base 35, a highly accurate curved surface can be formed.

[0049] [Effects of the present embodiment] The effects of the present embodiment will be described. (1) The ceiling 20 has a first plane 21, a second plane 22, and a connection surface 23 that connects the first plane 21 and the second plane 22. The connection surface 23 is smoothly connected to each of the upper ends of the first plane 21 and the second plane 22. The connection surface 23 is a curved surface that curves upward. According to this configuration, the gradient of the ceiling 20 continuously changes in the first direction. Therefore, the aesthetics of the ceiling 20 can be improved. Also, since no corners are generated on the ceiling 20 due to the connection of the planes to each other, the ceiling 20 gives a soft impression. Therefore, the indoor space 11 becomes a space with a sense of being wrapped. Furthermore, the light in the indoor space 11 can spread smoothly along the ceiling 20.

[0050] The connection surface portion 20c including the connection surface 23 is composed of a third base 35 whose third lower surface 35a is a curved surface that curves upward and a third ceiling panel 36 arranged along the third lower surface 35a of the third base 35. According to this configuration, without preparing the curved third ceiling panel 36, by arranging the third ceiling panel 36 along the third lower surface 35a of the third base 35, a highly accurate curved surface can be formed.

[0051] (2) The building 10 includes a girder 12 extending along the second direction. Therefore, by arranging the third bases 35 side by side in the direction in which the girder 12 extends with the girder 12 as a guide, the third bases 35 are arranged side by side in the second direction. Accordingly, the work of arranging the third bases 35 becomes easier.

[0052] Further, each of the third bases 35 is arranged such that the apex of the third lower surface 35a overlaps the girder 12 in the vertical direction. Thereby, the plurality of third bases 35 are arranged such that the apexes of the third lower surfaces 35a are aligned in a straight line. Accordingly, the displacement of the third bases 35 in the first direction can be suppressed.

[0053] (3) The upper end portions of the first base 31 and the second base 33 each extend toward the girder 12 and are connected to the girder 12. In the second direction, the first base 31, the second base 33, and the third base 35 are arranged at the same position. The third base 35 is in contact with the first lower surface 31a of the first base 31 and the second lower surface 33a of the second base 33. According to this configuration, the third base 35 can be stably arranged.

[0054] (4) A plaster material layer 37 is provided on the lower surfaces of the first ceiling panel 32, the second ceiling panel 34, and the third ceiling panel 36. According to this configuration, since the boundaries between the first ceiling panel 32 and the third ceiling panel 36 and between the second ceiling panel 34 and the third ceiling panel 36 are covered by the plaster material layer 37, the aesthetics of the ceiling 20 are further improved.

[0055] (5) The connection surface 23 is arcuate in a side view seen from the second direction. Thereby, the aesthetics of the ceiling 20 are further improved. (6) The building 10 is provided with a partition wall 13 extending along the first direction. The second plane 22 has a main body portion 22a located above the lower end 21a of the first plane 21 and an extension portion 22b located below the lower end 21a of the first plane 21. The partition wall 13 is located below the first plane 21, the connection surface 23, and the main body portion 22a of the second plane 22. The indoor space 11 has a first region 11a located below the first plane 21, the connection surface 23, and the main body portion 22a of the second plane 22, and a second region 11b located below the extension portion 22b of the second plane 22.

[0056] According to this configuration, the ceiling 20 has a shape that is asymmetric with respect to the apex 200 of the ceiling 20 in the first direction. Therefore, the entire indoor space 11 is a space that is asymmetric with respect to the apex 200 of the ceiling 20 in the first direction. On the other hand, the first region 11a is a region that is symmetric with respect to the apex 200 of the ceiling 20 in the first direction. By providing the partition wall 13 in the first region 11a, the partition wall 13 has a shape that is symmetric with respect to the apex 200 of the ceiling 20 in the first direction, so when the indoor space 11 is viewed from the second direction, it is emphasized that the first region 11a is a symmetric region. By providing the neat and symmetric first region 11a in the asymmetric indoor space 11 in this way, the design property of the indoor space 11 is improved.

[0057] In addition, since the height of the ceiling of the second region 11b is lower than the height of the ceiling of the first region 11a, a person in the indoor space 11 is likely to feel a sense of openness when moving from the second region 11b to the first region 11a.

[0058] (7) The building 10 is provided with a first wall portion 14 located on the first plane 21 side in the first direction. A window 14a is provided in the upper part of the first wall portion 14. Thereby, light easily enters the indoor space 11 from the window 14a. Also, compared with the case where the window 14a is provided in the second wall portion 15, the light entering the indoor space 11 is likely to spread along the ceiling 20.

[0059] <Modified Example> The above embodiments are examples of the forms that the building 10 can take, and are not intended to limit such forms. The building 10 can take forms different from those illustrated in the above embodiments. Examples thereof include forms in which part of the configuration of the embodiment is replaced, changed, or omitted, or forms in which a new configuration is added to the embodiment. Modification examples of the embodiment are shown below.

[0060] · The building 10 is not limited to a two-story detached house. · The indoor space 11 may be provided on the first floor or the third floor and above of the building 10. · The ridge beam 12 does not have to extend along the second direction. In this case, the third base 35 may be arranged side by side in the second direction using, as a guide, a guide member that extends along the second direction and is separate from the ridge beam 12.

[0061] · In the ridge beam 12 of the above embodiment, the portion that supports the sloping beam and the portion where the groove 12b into which the third base 35 is inserted are provided are integrated, but the portion that supports the sloping beam and the portion where the groove 12b into which the third base 35 is inserted may be separate bodies.

[0062] · The first base 31 and the second base 33 do not have to extend up to the ridge beam 12. · The plurality of third bases 35 do not have to be arranged such that the vertices of the third lower surfaces 35a overlap the ridge beam 12 in the vertical direction.

[0063] · In the second direction, the first base 31, the second base 33, and the third base 35 do not have to be arranged at the same position. When the third base 35 is arranged at a position different from the first base 31 and the second base 33 in the second direction, the third base 35 does not contact a part of the first lower surface 31a of the first base 31 and a part of the second lower surface 33a of the second base 33. Even in this example, at least the effect of the above (1) is achieved.

[0064] · The third lower surface 35a of the third base 35 may be continuous with the lower surface 12a of the ridge beam 12. In this case, the third ceiling panel 36 is arranged to contact not only the third lower surface 35a of the third base 35 but also the lower surface 12a of the ridge beam 12.

[0065] · The first ceiling panel 32, the second ceiling panel 34, and the third ceiling panel 36 may be made of materials other than gypsum board. The first ceiling panel 32, the second ceiling panel 34, and the third ceiling panel 36 may be made of, for example, resin boards. However, the material constituting the third ceiling panel 36 shall have flexibility.

[0066] · A plastering material layer 37 may not be provided on the lower surfaces of the first ceiling panel 32, the second ceiling panel 34, and the third ceiling panel 36. As an example, the lower surfaces of the first ceiling panel 32, the second ceiling panel 34, and the third ceiling panel 36 may be exposed in the indoor space 11. As another example, a cloth may be pasted on the lower surfaces of the first ceiling panel 32, the second ceiling panel 34, and the third ceiling panel 36. Even in these examples, at least the effect of the above (1) is achieved.

[0067] · The connection surface 23 may not be arc-shaped in a side view seen from the second direction. · The lower end of the second plane 22 may be provided at the same height as the lower end 21a of the first plane 21. That is, the second plane 22 may not have an extension part 22b. In this case, the indoor space 11 is a space symmetric with respect to the apex 200 of the ceiling 20 in the first direction. Also, the indoor space 11 does not have a second region 11b. Even in this example, at least the effect of the above (1) is achieved.

[0068] · The building 10 may not be provided with a partition wall 13. This specification discloses the following technology. [Appendix 1] A building having a room with an indoor space covered by a ceiling, the ceiling having a first plane and a second plane. When the direction in which the first plane and the second plane are arranged side by side in plan view is defined as the first direction, the first plane is inclined such that its height increases as it approaches the second plane in the first direction, and the second plane is inclined such that its height increases as it approaches the first plane in the first direction. The ceiling further has a connecting surface connecting the first plane and the second plane, and the connecting surface is a curved surface that smoothly connects to the upper ends of the first plane and the second plane and curves upward. The first plane portion including the first plane is a plane inclined such that the height of the first lower surface increases as it approaches the second plane in the first direction and is composed of a plurality of first bases arranged side by side in a second direction orthogonal to the first direction in plan view and a first ceiling panel arranged along the first lower surface. The second plane portion including the second plane is a plane inclined such that the height of the second lower surface increases as it approaches the first plane in the first direction and is composed of a plurality of second bases arranged side by side in the second direction and a second ceiling panel arranged along the second lower surface. The connecting surface portion including the connecting surface is a curved surface with a third lower surface that curves upward and is composed of a plurality of third bases arranged side by side in the second direction and a third ceiling panel arranged along the third lower surface.

[0069] [Appendix 2] In the building according to Appendix 1, a ridge beam extending in the second direction is provided, and each of the plurality of the third bases is arranged such that the apex of the third lower surface overlaps the ridge beam in the vertical direction.

[0070] [Appendix 3] In the building according to Appendix 2, the upper end portions of the first base and the second base each extend toward the ridge beam and are connected to the ridge beam. In the second direction, the first base, the second base, and the third base are arranged at the same position, and the third base is in contact with the first lower surface and the second lower surface.

[0071] [Appendix 4] In the building described in Appendix 1, a plaster material layer is provided on the lower surfaces of the first ceiling panel, the second ceiling panel, and the third ceiling panel.

[0072] [Appendix 5] In the building described in Appendix 1, the connection surface is arc-shaped in a side view seen from the second direction.

[0073] [Appendix 6] In the building described in Appendix 1, it includes a wall portion extending along the first direction. The second plane has a main body portion located above the lower end of the first plane and an extension portion located below the lower end of the first plane. The wall portion is located below the first plane, the connection surface, and the main body portion of the second plane. The indoor space has a first region located below the first plane, the connection surface, and the main body portion of the second plane, and a second region located below the extension portion of the second plane.

Explanation of Reference Numerals

[0074] 10…Building, 10a…Room, 11…Indoor space, 11a…First region, 11b…Second region, 12…Principal beam, 13…Partition wall as a wall portion, 20…Ceiling, 20a…First flat portion, 20b…Second flat portion, 20c…Connection surface portion, 21…First plane, 21a…Lower end, 22…Second plane, 22a…Main body portion, 22b…Extension portion, 23…Connection surface, 31…First base, 31a…First lower surface, 32…First ceiling panel, 33…Second base, 33a…Second lower surface, 34…Second ceiling panel, 35…Third base, 35a…Third lower surface, 36…Third ceiling panel, 37…Plaster material layer, 200…Vertex.

Claims

1. A building comprising a room having an indoor space covered by a ceiling, The ceiling has a first plane and a second plane, When the direction in which the first plane and the second plane are arranged side by side in plan view is defined as the first direction, The first plane is inclined such that its height increases as it approaches the second plane in the first direction, The second plane is inclined such that its height increases as it approaches the first plane in the first direction, The ceiling further has a connecting surface connecting the first plane and the second plane, The connecting surface is a curved surface that smoothly connects to the upper ends of the first plane and the second plane respectively and curves upward, The first plane portion including the first plane is a plane inclined such that the height of the first lower surface increases as it approaches the second plane in the first direction, and is composed of a plurality of first bases arranged side by side in a second direction orthogonal to the first direction in plan view, and a first ceiling panel arranged along the first lower surface, The second plane portion including the second plane is a plane inclined such that the height of the second lower surface increases as it approaches the first plane in the first direction, and is composed of a plurality of second bases arranged side by side in the second direction, and a second ceiling panel arranged along the second lower surface, The connecting surface portion including the connecting surface is a building composed of a plurality of third bases arranged side by side in the second direction, where the third lower surface is a curved surface that curves upward, and a third ceiling panel arranged along the third lower surface.

2. Comprising a girder extending in the second direction, The building according to claim 1, wherein the apexes of the plurality of third bases are respectively arranged such that they overlap the girder in the vertical direction.

3. The upper end portions of the first base and the second base respectively extend toward the girder and are connected to the girder. In the second direction, the first base, the second base, and the third base are arranged at the same position. The building according to claim 2, wherein the third base is in contact with the first lower surface and the second lower surface.

4. The building according to claim 1, wherein a plaster material layer is provided on the lower surfaces of the first ceiling panel, the second ceiling panel, and the third ceiling panel.

5. The building according to claim 1, wherein the connection surface is arc-shaped in a side view seen from the second direction.

6. Comprising a wall portion extending along the first direction. The second plane has a main body portion located above the lower end of the first plane and an extension portion located below the lower end of the first plane. The wall portion is located below the first plane, the connection surface, and the main body portion of the second plane. The indoor space of the building according to claim 1 has a first region located below the first plane, the connection surface, and the main body portion of the second plane, and a second region located below the extension portion of the second plane.

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