Attic unit

Abstract

To mainly facilitate work of fixing an upper wall panel to a ceiling part.SOLUTION: An attic space unit 6 has a ceiling part 11 having an almost rectangular shape in plan view, and a column 12 for supporting at least a corner part of the ceiling part 11 from below, and forms an attic space 14 below the ceiling part 11. In the attic space unit 6, an upper wall panel 22 having a height 21 which does not reach a lower end of the column 12 is installed between the adjacent columns 12. In a side part 23 of the ceiling part 11, a wall receiving metal fitting 25 capable of engaging and holding the upper wall panel 22 in a vertical direction 24 is mounted. The upper wall panel 22 is fixed to the wall receiving metal fitting 25 in a lateral direction in a state of being pushed against a lower surface 26 of the ceiling part 11.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an attic unit. [Background technology]

[0002] An attic is formed on a roof by installing an attic unit prefabricated in a factory on top of the main body of a building (see, for example, Patent Document 1).

[0003] For example, some attic units have a ceiling portion that is approximately rectangular in plan view and supports that support at least the corner portions of the ceiling portion from below. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-016043 Summary of the Invention [Problem to be solved by the invention]

[0005] When installing upper wall panels between adjacent posts in attic units that do not reach the bottom of the posts, the large, heavy upper wall panels must be manually supported and secured to the ceiling, which poses a significant workload.

[0006] Therefore, a main object of the present invention is to contribute to improving the above-mentioned problems. [Means for solving the problem]

[0007] In response to the above problems, the present invention provides: An attic unit having a ceiling portion having a rectangular shape in a plan view and a support pillar supporting at least a corner portion of the ceiling portion from below, forming an attic space below the ceiling portion, Between adjacent columns, upper wall panels are installed whose height does not reach the lower ends of the columns; Wall receiving brackets are attached to the edges of the ceiling portion so that the upper wall panel can be engaged and held in the vertical direction. The upper wall panel is laterally fixed to the wall receiving bracket while being pressed against the underside of the ceiling portion. [Effects of the Invention]

[0008] According to the present invention, the above-mentioned configuration can facilitate the work of fixing the upper wall panel to the ceiling portion. [Brief explanation of the drawings]

[0009] [Figure 1] This is an overall perspective view of the roof of a building equipped with an attic unit according to this embodiment. [Figure 2] FIG. 2 is a vertical cross-sectional view of the roof of FIG. 1 as seen from the side. [Figure 3] This is an overall perspective view of the attic unit. [Figure 4] This is a vertical cross-sectional view of the long side of the attic unit seen from the side. [Figure 5] This is a vertical cross-sectional view of the short side of the attic unit seen from the side. [Figure 6] FIG. 10 is a partially enlarged side view (upside down) showing the state in which the wall bracket is attached to the edge portion of the roof. [Figure 7] FIG. [Figure 8] 10 is a partially enlarged vertical cross-sectional view seen from the side showing the state in which the upper wall panel is engaged and held by the wall receiving fitting. FIG. [Figure 9] FIG. 10 is a partially enlarged vertical cross-sectional view seen from the side, showing the state in which the upper wall panel is fixed to the wall receiving bracket. [Figure 10] 10 is a partially enlarged vertical cross-sectional view seen from the side showing the state in which the upper wall panel is fixed to a portion where there is no wall receiving metal fitting. FIG. [Figure 11] 10 is a partially enlarged cross-sectional view seen from above showing the state in which the upper wall panel on the long side and the upper wall panel on the short side are fixed together. FIG. [Figure 12] FIG. 10 is an enlarged partial cross-sectional view seen from above, showing the state in which adjacent wall panels are connected and fixed to each other. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, this embodiment will be described in detail with reference to the drawings. 1 to 12 are used to explain this embodiment. [Example]

[0011] <Configuration> The configuration of this embodiment will now be described.

[0012] As shown in FIG. 1 (FIG. 2), an attic 3 is formed inside a roof 2 of a building 1 such as a house.

[0013] Here, the building 1 is a structure fixed to the land, and has, for example, a building body 4 and a roof 2. The building 1 may be of any structure, for example, wooden, steel-framed, or concrete. In this embodiment, the building 1 is a unit building. A unit building is a building 1 that can be constructed in a short period of time by transporting building units 5 manufactured in advance in a factory to a construction site and assembling them there.

[0014] The building main body 4 is the main body of the building 1 that has living spaces and the like inside.

[0015] The roof 2 is installed on the top of the building body 4 and is a covering part for protecting the top of the building body 4 from sunlight, rain and dew.

[0016] The attic 3 is a space other than the living room formed inside the roof 2, and is used for storage, for example.

[0017] In this embodiment, the attic 3 is formed by an attic unit 6 as shown in Fig. 3. The attic unit 6 may have the following configuration.

[0018] (1a) Attic unit 6 is It may also have a ceiling portion 11 that is approximately rectangular in plan view and pillars 12 that support at least the corner portions of the ceiling portion 11 from below, forming an attic space 14 (Figure 2) below the ceiling portion 11.

[0019] Here, the attic unit 6 is a unit for constructing the attic 3, and is manufactured in advance in a factory. The attic unit 6 becomes part of the roof 2 as it is when installed on top of the building main body 4 at the construction site.

[0020] In this embodiment, the roof 2 is constructed around the attic unit 6. That is, the roof 2 is constructed by installing inclined roof panels 15 (FIGS. 1 and 2) so as to surround the periphery of the attic unit 6. This allows the roof 2 to have a simpler structure.

[0021] The attic unit 6 is approximately rectangular parallelepiped-shaped and is installed in a single unit or multiple units (Figure 1) in the center of the top of the building body 4, aligned with the building body 4. In the case of a unit building, the attic unit 6 is installed in a position aligned with the building unit 5 that makes up the building body 4. Note that in Figure 2 and subsequent figures, the attic unit 6 is shown as a single unit.

[0022] The inclined roof panels 15 may be, for example, approximately rectangular, triangular, or trapezoidal in plan view, depending on the planar shape of the upper part of the building main body 4. In this embodiment, the inclined roof panels 15 are approximately trapezoidal in plan view, and are installed so as to slope downward from each side of the attic unit 6 to the corresponding side of the upper part of the building main body 4, thereby covering the entire upper part of the building main body 4.

[0023] The ceiling portion 11 is a substantially flat surface portion that forms the upper portion of the attic unit 6. The ceiling portion 11 substantially defines the size and shape of the attic unit 6. The ceiling portion 11 will be described later.

[0024] The corner portions are corner portions and their surrounding areas of the ceiling portion 11. In the case of the ceiling portion 11 that is substantially rectangular in plan view, there are four corner portions.

[0025] The support pillars 12 are vertical members (pillars) that support the ceiling portion 11. The support pillars 12 roughly determine the height of the attic unit 6. The multiple support pillars 12 are formed to have roughly the same shape and length. The support pillars 12 can be made of steel or wood, etc. The support pillars 12 can also be made of steel pipes or structural steel, etc. In this embodiment, the support pillars 12 are structural steel with a C-shaped cross section. The support pillars 12 can also be provided at positions other than the corner portions as needed. In this embodiment, support pillars 12 are also provided at the middle positions of the side portions 23 of the ceiling portion 11.

[0026] The attic space 14 is the space inside the attic unit 6, and is formed in the area below the ceiling 11 surrounded by the support pillars 12. When multiple attic units 6 are installed side by side, the attic spaces 14 may be connected to form one space, or may be divided into multiple spaces of appropriate size.

[0027] Hereinafter, unless otherwise specified, "inside" will mainly refer to the inside of the attic unit 6, and "outside" will mainly refer to the outside of the attic unit 6.

[0028] (1b) As shown in Figure 4 (Figure 5), in the attic unit 6, Between adjacent columns 12, upper wall panels 22 may be installed with a height 21 that does not reach the bottom ends of the columns 12. As shown in FIGS. 6 (to 8), wall receiving fittings 25 (FIG. 7) capable of locking and holding the upper wall panel 22 in the vertical direction 24 may be attached to the side portions 23 of the ceiling portion 11. As shown in FIG. 9, the upper wall panel 22 may be fixed laterally to a wall receiving bracket 25 while being pressed against the underside 26 of the ceiling portion 11 .

[0029] Here, the spacing between adjacent columns 12 is basically between four columns 12 located at the corners of the ceiling portion 11. When columns 12 are provided at positions other than the corners, the spacing may be between columns 12 at the corners and columns 12 at positions other than the corners, or between columns 12 at positions other than the corners.

[0030] The lower end of the support pillar 12 is the lower end of the support pillar 12. The lower end of the support pillar 12 is fixed to the upper part of the building main body 4. For this purpose, a grounding member 12a (FIG. 3) for grounding and fixing to the upper part of the building main body 4 is integrally provided at the lower end of the support pillar 12.

[0031] Furthermore, a floor 27 for the attic space 14 is installed on top of the building main body 4, and a lower wall panel 28 is attached at the construction site between the floor 27 of the attic space 14 and the lower end of the upper wall panel 22. The lower wall panel 28 has substantially the same structure as the upper wall panel 22. The lower wall panel 28 is installed so as to be flush with the upper wall panel 22, and together with the upper wall panel 22, forms the side wall of the attic unit 6. Heat insulating material 29 is installed on the outside of the side wall, etc., as needed. Heat insulating material 29 is also installed in various other places, such as the top of the ceiling 11 and the top of the building main body 4, as needed.

[0032] The height 21 that does not reach the lower end of the support 12 means that the height 21 of the upper wall panel 22 is lower than the support 12. The height 21 of the upper wall panel 22 is the dimension of the upper wall panel 22 in the up-down direction 24. The length of the support 12 is the dimension of the support 12 in the up-down direction 24. The height 21 of the upper wall panel 22 is, for example, about 1 / 2 to 3 / 4 of the length of the support 12. However, the height 21 of the upper wall panel 22 is not limited to this. Then, by attaching the upper wall panel 22 to a position above the support 12, the lower side of the support 12 becomes open with no upper wall panel 22 present, and the above-mentioned lower wall panel 28 is attached at the construction site to close this open portion (open section).

[0033] The upper wall panel 22 is a panel that forms a wall that covers the upper part of the side of the attic unit 6. A pre-fabricated upper wall panel 22 is used. The upper wall panel 22 is composed of a panel frame 31 and a face material 32. Like the upper wall panel 22, the lower wall panel 28 is also composed of a panel frame and a face material.

[0034] The panel frame 31 is formed into a substantially rectangular shape in side view by an upper frame 31a, a lower frame 31b, and left and right vertical frames 31c. The upper frame 31a and the lower frame 31b are located above and below the panel frame 31 and extend horizontally. The vertical frames 31c are located on both sides of the panel frame 31 and extend in the up-down direction 24. One or more vertical bars 31d are provided inside the panel frame 31 at a required interval and parallel to the vertical frames 31c.

[0035] The face material 32 is a flat member that almost completely covers the surface of the panel frame 31 and is attached to the surface of the panel frame 31 that faces the inside of the attic space 14. The face material 32 is approximately rectangular in side view, with approximately the same size and shape as the panel frame 31. In this embodiment, the upper end of the face material 32 is approximately flush with the upper surface of the upper frame 31a, and the lower end is slightly higher than the lower surface of the lower frame 31b. The lower end of the face material 32 of the upper wall panel 22 butts against the upper end of the face material of the lower wall panel 28, which protrudes slightly upward, with almost no gap between them. This makes the joint between the upper wall panel 22 and the lower wall panel 28 less noticeable.

[0036] The side portion 23 is at least one of the four sides of the ceiling portion 11, which is substantially rectangular in plan view.

[0037] The up-down direction 24 is the vertical direction connecting directly above and directly below. The ceiling portion 11 is a horizontal surface that is approximately perpendicular to the up-down direction 24. The direction in which the long sides of the ceiling portion 11 extend is the long side direction 33 (or girder direction), and the direction in which the short sides extend is the short side direction 34 (or gable direction). For example, the support columns 12 at positions other than the corner portions are mainly provided singly or multiple times in the middle of the side portions 23 in the long side direction 33.

[0038] The wall receiving bracket 25 is a bracket that temporarily locks and holds the upper wall panel 22 in the vertical direction 24 when the upper wall panel 22 is installed in the factory. The wall receiving bracket 25 is also used to secure the upper wall panel 22. The wall receiving bracket 25 secures the upper wall panel 22 in a state where the locking and holding of the upper wall panel 22 is released.

[0039] The wall-receiving metal fittings 25 are attached at least in two or more locations, spaced apart, to the side portion 23 of the ceiling portion 11 to which the upper wall panel 22 is attached. For example, the wall-receiving metal fittings 25 are provided on the side portion 23 in the long side direction 33 of the ceiling portion 11. Furthermore, for example, the wall-receiving metal fittings 25 are provided on the upper wall panel 22 at an appropriate position near both ends or in the middle of the upper wall panel 22. The wall-receiving metal fittings 25 are installed at a position that avoids the vertical bars 31d of the upper wall panel 22.

[0040] The underside 26 of the ceiling portion 11 is the lower surface of the ceiling portion 11 that is inside the attic space 14.

[0041] The lateral direction is, for example, a substantially horizontal direction (long side direction 33 or short side direction 34, etc.) that is substantially perpendicular to the side portion 23 to which the upper wall panel 22 of the ceiling portion 11 is attached.

[0042] (2) In the above, as shown in FIG. 7, the wall receiving bracket 25 is a first horizontal surface portion 25a that can be attached to the edge portion 23 on the lower surface 26 side of the ceiling portion 11; a vertical surface portion 25b extending downward from an end of the first horizontal surface portion 25a; It may also have a second horizontal surface portion 25c that extends from the lower end of the vertical surface portion 25b in the opposite direction to the first horizontal surface portion 25a and that engages and holds the upper wall panel 22.

[0043] Here, the first horizontal surface portion 25a is a substantially horizontal surface formed on the upper end side of the wall-receiving bracket 25. The first horizontal surface portion 25a is fixed in contact with the edge portion 23 on the underside 26 side of the ceiling portion 11. Pilot holes for mounting may be provided in advance in the first horizontal surface portion 25a. The end portion of the first horizontal surface portion 25a is the end portion of the first horizontal surface portion 25a that is inside the attic space 14.

[0044] The vertical surface portion 25b is a substantially vertical surface formed in the middle portion of the wall-receiving metal fitting 25. The lower end of the vertical surface portion 25b is the lower end portion of the vertical surface portion 25b.

[0045] The second horizontal surface portion 25c is a substantially horizontal surface formed on the lower end side of the wall-receiving metal fitting 25. The first horizontal surface portion 25a, the vertical surface portion 25b, and the second horizontal surface portion 25c are integrally formed.

[0046] As a result, the wall-receiving bracket 25 is a metal fitting that is approximately Z-shaped in side view, and is formed, for example, by bending a strip of flat plate material into a stepped shape at an approximately right angle. The wall-receiving bracket 25 is installed with the first horizontal surface portion 25a facing the outside of the attic space 14 and the second horizontal surface portion 25c facing the inside of the attic space 14. As a result, the second horizontal surface portion 25c forms a hook that protrudes in a cantilevered manner toward the inside of the attic space 14.

[0047] (3) In the above, as shown in Figure 8, the vertical surface portion 25b may have a clearance 41 between the upper part of the upper wall panel 22 engaged and held by the second horizontal surface portion 25c and the lower surface 26 of the ceiling portion 11.

[0048] Here, the upper part of the upper wall panel 22 is the upper surface of the upper frame 31 a of the upper wall panel 22 .

[0049] The allowance 41 may be as small as, for example, about 1 to 3 times the thickness of the wall receiving bracket 25, or about 2 to 6 mm.

[0050] The vertical surface portion 25b is formed so that the distance in the vertical direction 24 from the position of the lower surface 26 of the ceiling portion 11 to the upper surface of the second horizontal surface portion 25c is the sum of the height of the upper frame 31a of the upper wall panel 22 and the clearance 41.

[0051] (4) In the above, the second horizontal surface portion 25c may have a length 52 that is approximately equal to the thickness 51 of the panel frame 31 of the upper wall panel 22.

[0052] Here, the panel frame 31 of the upper wall panel 22 is formed so that all parts have approximately the same thickness 51. The thickness 51 of the panel frame 31 of the upper wall panel 22 is the dimension (width) of the part excluding the face material 32 in the direction perpendicular to the surface of the upper wall panel 22.

[0053] The length 52 of the second horizontal surface portion 25c is the dimension (width) of the second horizontal surface portion 25c in the direction perpendicular to the surface of the upper wall panel 22. In this embodiment, the length 52 of the second horizontal surface portion 25c is equal to or slightly shorter than the thickness 51 of the panel frame 31.

[0054] (5) In the above, the wall receiving bracket 25 may be attached to a beam 61 extending in the long side direction 33 of the ceiling portion 11.

[0055] Here, the beams 61 are metal strength members provided along the long sides of the ceiling portion 11. The long sides of the ceiling portion 11 are formed by a pair of beams 61. As a result, the upper wall panels 22 constituting the walls (girder walls) along the long side direction 33 are securely fastened to and fixed to the highly strong beams 61 by the wall brackets 25 attached to the beams 61. The upper wall panels 22 are positioned further inward in the attic space 14 than the beams 61. The corner supports 12 are attached to both ends of the beams 61.

[0056] Since no beams 61 are provided on the side portions 23 of the ceiling portion 11 in the short side direction 34, the upper wall panels 22 constituting the walls (gable walls) along the short side direction 34 are fixed not to the wall receiving brackets 25 but to mounting brackets 62 (FIG. 3) attached to the supports 12. The mounting brackets 62 are, for example, substantially L-shaped in plan view.

[0057] However, it is also structurally possible to provide a beam 61 similar to that described above on the edge portion 23 of the ceiling portion 11 in the short side direction 34, attach a wall bracket 25 to this beam 61, and use the wall bracket 25 to attach the upper wall panel 22 on the short side.

[0058] The ceiling section 11 has a frame structure formed by a pair of parallel beams 61 and multiple ceiling joists 63 spaced apart between the pair of beams 61. The ceiling joists 63 are made of wood or metal. A waterproof roof finishing material 64 (Fig. 2) is attached to the upper surface of the ceiling section 11. A ceiling surface material 65 is attached to the underside 26 of the ceiling section 11. The underside 26 of the ceiling surface material 65 becomes the underside 26 of the ceiling section 11.

[0059] The beam 61 is made of a steel beam with an inward C-shaped cross section, etc. The C-shaped cross section of the beam 61 is made up of an upper flange 61a, a web 61b, and a lower flange 61c.

[0060] The upper flange 61a is positioned higher than the upper surface of the ceiling joist 63. The lower flange 61c is positioned slightly higher than the lower surface 26 of the ceiling portion 11. The corner support posts 12 are attached to the lower flange 61c with their outer surfaces aligned approximately flush with the web 61b of the beam 61. The first horizontal surface portion 25a of the wall receiving bracket 25 is abutted and fixed against the lower surface 26 of the lower flange 61c with its position accurately aligned in the long side direction 33 and the short side direction 34. The length 52 of the first horizontal surface portion 25a of the wall receiving bracket 25 is approximately the same as or slightly longer than the width of the lower flange 61c.

[0061] The ceiling joists 63 extend in the short side direction 34 of the ceiling portion 11. The multiple ceiling joists 63 have approximately the same shape and length. The ceiling joists 63 are installed approximately horizontally and parallel to each other between a pair of beams 61 so that they are at the same height. The ceiling joists 63 have smaller dimensions in the up-down direction 24 than the beams 61. The wall receiving bracket 25 may be attached to the beam 61 at the position of the ceiling joists 63, or at a position where there are no ceiling joists 63.

[0062] The ceiling joist 63 has an L-shaped cutout at the bottom of each end, which is wider than the width of the bottom flange 61c of the beam 61 (cutout portion 63a). Both end portions of the ceiling joist 63 at the cutout portion 63a are engaged and held from above by the bottom flange 61c of the beam 61. As a result, the uncut portion in the middle of the ceiling joist 63 is positioned below the bottom flange 61c. The ceiling surface material 65 is attached to the lower part of the ceiling joist 63 that is not cut out.

[0063] A wall support beam 66 is attached to the step on the inside of the cutout 63a of the ceiling joist 63. The wall support beam 66 is a square piece of timber that extends in the long side direction 33 along the beam 61 with a length that is approximately the same as or slightly shorter than the length of the beam 61. The wall support beam 66 may be a single piece, or may be divided into multiple pieces that are connected together.

[0064] The cutout portion 63a of the ceiling joist 63 is formed wider than the bottom flange 61c of the beam 61 so that the width is equal to or greater than the width of the wall support crosspiece 66. Therefore, the wall support crosspiece 66 is positioned more inward than the bottom flange 61c of the beam 61 with respect to the cutout portion 63a.

[0065] The wall support beam 66 has a height that makes it approximately flush with the underside 26 of the ceiling portion 11. The wall support beam 66 has a width that is approximately the same as or narrower than that of the panel frame 31. The wall support beam 66 supports the upper part of the panel frame 31 in the vertical direction 24. As a result, the wall support beam 66 determines the position of the upper wall panel 22 in the vertical direction 24.

[0066] Also, the wall support crosspiece 66 may be made to have approximately the same width as the panel frame 31 so that it can horizontally support the vertical surface portion 25b of the wall support fitting 25. In this way, the wall support crosspiece 66 determines the horizontal position of the vertical surface portion 25b of the wall support fitting 25, and the vertical surface portion 25b determines the horizontal position of the upper wall panel 22. In other words, the wall support crosspiece 66 determines the horizontal position of the upper wall panel 22 via the vertical surface portion 25b of the wall support fitting 25.

[0067] In the drawing, S1 to S9 are fastening members such as screws.

[0068] <Operation> The operation of this embodiment will now be described.

[0069] The attic unit 6 is manufactured in a factory. In this case, a frame structure is first formed by erecting multiple parallel ceiling joists 63 vertically between a pair of parallel beams 61. A roof finish material 64 is attached to the top surface of this frame structure, and a ceiling surface material 65 is attached to the underside 26 to form the ceiling section 11. Then, as shown in Figure 6, the ceiling section 11 is turned upside down, and the first horizontal surface portion 25a of the wall receiving bracket 25 is abutted from above against the lower flange 61c of the upward-facing beam 61, and the bracket is attached from above downwards almost vertically with fastening members S1 such as screws.

[0070] Thereafter, the ceiling portion 11 is returned to its original correct orientation, and the supports 12 are attached to the corners of the lower part of the ceiling portion 11. In this way, the basic shape of the attic unit 6 is formed.

[0071] Then, the upper wall panel 22 is attached to the upper portion between the adjacent support posts 12. For example, the upper wall panel 22 may be attached to the short side first, followed by the long side. The upper wall panel 22 is attached with the face material 32 facing inward and the panel frame 31 facing outward. The upper wall panel 22 may be attached in any position required.

[0072] First, the upper wall panel 22 on the short side is attached to the support 12. A mounting bracket 62 is installed on the support 12 with a fastening member S2 such as a screw, and the upper wall panel 22 on the short side is attached to this mounting bracket 62 with a fastening member S3 such as a screw (see FIG. 11).

[0073] The procedure for this may be, for example, to attach the support 12 with the mounting bracket 62 already installed to the ceiling portion 11 to form the basic shape of the attic unit 6, and then attach the upper wall panel 22 on the short side to this mounting bracket 62.

[0074] Alternatively, a pair of posts 12 with mounting brackets 62 already installed can be connected by an upper wall panel 22 on the short side, and then attached to the ceiling 11 to form the basic shape of the attic unit 6.

[0075] The upper wall panel 22 on the short side is attached at its top to the ceiling joists 63 located on the short side edge portion 23 from bottom to top with fastening members S4 such as screws (FIG. 5).

[0076] In addition, if the structure does not include the upper wall panel 22 on the short side, the mounting bracket 62 may be attached with a joint bar (not shown) or the like that extends in the vertical direction 24 and has the same length as the height 21 of the upper wall panel 22 on the short side.

[0077] The upper wall panel 22 on the long side is attached to a wall bracket 25 installed on the beam 61 as shown in FIG.

[0078] First, the upper wall panel 22 on the long side is engaged and held by the wall receiving fittings 25. The upper wall panel 22 is lifted and moved from the inside to the outside of the attic unit 6 until the upper frame 31a of the upper wall panel 22 is placed on the second horizontal surface portion 25c of the wall receiving fittings 25, whereby the upper wall panel 22 is engaged and held by the wall receiving fittings 25.

[0079] Next, the upper wall panel 22 on the long side is fixed. At this time, the upper wall panel 22, which is engaged and held by the wall support bracket 25, is lifted slightly upward so that it is lifted off the second horizontal surface portion 25c. Then, the upper part of the upper wall panel 22 is pressed against the underside 26 of the ceiling portion 11 and the underside of the wall support wooden crosspiece 66, thereby positioning the upper wall panel 22.

[0080] 9, fastening members S5 such as screws are attached laterally to the upper frame 31a of the upper wall panel 22 from the outside of the attic unit 6 (the side of the panel frame 31 or the rear side) through the vertical surface 25b of the wall-receiving metal fitting 25. As a result, the upper wall panel 22 is fixed to the vertical surface 25b of the wall-receiving metal fitting 25.

[0081] For the portions where there are no wall brackets 25, the upper portion of the upper wall panel 22 on the short side is fastened from below using fastening members S6 such as screws, in the same way that the upper portion of the upper wall panel 22 is fastened from below to the ceiling joist 63 using fastening members S4 such as screws. That is, as shown in Figure 10, fastening members S6 such as screws are attached to the upper frame 31a of the upper wall panel 22 from the rear side, facing upward from the bottom. This fixes the upper wall panel 22 to the wall bracket 66, or to the wall bracket 66 and the ceiling joist 63. Note that fastening members S6 may also be attached in the same way to portions where there are wall brackets 25.

[0082] The upper wall panel 22 is positioned so that it aligns with a marking line (not shown) formed in advance on the underside 26 of the ceiling portion 11. The marking line is drawn, for example, at a position inward from the edge of the ceiling surface material 65 by the thickness of the surface material 32. This allows the upper part of the upper wall panel 22 on the long side to be accurately aligned in the inside-outside direction of the attic unit 6. For example, the panel frame 31 of the upper wall panel 22 abuts against the wall support truss 66 from below, and the surface material 32 abuts against the edge of the ceiling surface material 65 from below. The inside-outside direction is a nearly horizontal direction connecting the inside and outside of the attic unit 6.

[0083] As shown in FIG. 11 , the upper wall panel 22 on the long side has its side vertical frame 31c pressed against the face material 32 at the position of the side (vertical frame 31c) of the upper wall panel 22 on the short side. As a result, the side of the upper wall panel 22 on the long side is aligned with the upper wall panel 22 on the short side. Then, the vertical frames 31c are fastened laterally (through the face material 32) from the rear side with fastening members S7 such as screws. As a result, the side of the upper wall panel 22 on the long side and the side of the upper wall panel 22 on the short side are connected and integrated. If an upper wall panel 22 on the short side is not provided, the side of the upper wall panel 22 on the long side is connected and fixed to the above-mentioned joint batten with the fastening members S7.

[0084] Furthermore, as shown in Figure 12, when multiple upper wall panels 22 on the long sides are installed side by side along the beams 61, the vertical frames 31c of adjacent upper wall panels 22 are placed in contact with each other. Then, the vertical frames 31c of adjacent upper wall panels 22 are fastened horizontally from the back side using fastening members S8 such as screws. This connects and integrates the adjacent upper wall panels 22 on the long sides. At this time, the face materials 32 of the adjacent upper wall panels 22 on the long sides are flush with each other. Adjacent upper wall panels 22 are fastened together with the back surfaces of the adjacent vertical frames 31c flush with each other.

[0085] This completes the manufacturing process of the attic unit 6 in the factory.

[0086] The attic unit 6 manufactured in this manner is transported from the factory to the construction site and installed and fixed to the top of the building body 4 constructed at the construction site. Then, as shown in Figures 4 and 5, the attic unit 6 has a lower wall panel 28 installed below the upper wall panel 22, and the lower wall panel 28 closes the open portion below the upper wall panel 22.

[0087] The upper part of the lower wall panel 28 is fastened from the back side to the lower part of the upper wall panel 22 with fastening members S9 such as screws in the vertical direction 24 from the bottom toward 45. In addition, the lower part of the lower wall panel 28 is fastened from the back side to the floor 27 of the attic space 14 with fastening members S9 such as screws in the vertical direction 24 from the top toward the bottom. This completes the installation of the attic space 14, and the attic 3 is finished.

[0088] Furthermore, as shown in FIG. 2, roof panels 15 are installed diagonally between the attic unit 6 and the building body 4, thereby completing the roof 2.

[0089] <Effects> According to this embodiment, the following effects can be obtained.

[0090] (Effect 1) The attic unit 6 has a ceiling portion 11 that is approximately rectangular in plan view, and supports 12 that support at least the corner portions of the ceiling portion 11 from below. This gives the attic unit 6 a basic shape, and the attic unit 6 has an attic space 14 on the underside of the ceiling portion 11, inside the portion surrounded by the supports 12.

[0091] In the attic unit 6, upper wall panels 22 with a height 21 that does not reach the bottom ends of the posts 12 may be installed between adjacent posts 12. This allows the upper side of the attic space 14 to be divided into an inside and outside by the upper wall panels 22. The attic unit 6 can then be fabricated to a more complete state in the factory.

[0092] In the attic unit 6, a wall receiving bracket 25 capable of engaging and holding the upper wall panel 22 in the vertical direction 24 is attached to an edge portion 23 of the ceiling portion 11, and the upper wall panel 22 may be fixed laterally to the wall receiving bracket 25 while being pressed against the underside 26 of the ceiling portion 11. In this way, the wall receiving bracket 25 can be used to temporarily engage and hold the upper wall panel 22 in the vertical direction 24 relative to the edge portion 23 of the ceiling portion 11. Therefore, before being fixed, the upper wall panel 22 is temporarily held in a suspended state from the ceiling portion 11, and the attic unit 6 supports the load.

[0093] In this state, the upper wall panel 22 is lifted up and pressed against the underside 26 of the ceiling 11, and fixed laterally to the wall receiving bracket 25. As a result, the upper part of the upper wall panel 22 is fixed to the side portion 23 of the ceiling 11 via the wall receiving bracket 25.

[0094] In this way, by engaging and temporarily holding the upper wall panel 22 with the wall receiving bracket 25, the attic unit 6 temporarily bears the load of the upper wall panel 22, thereby reducing the work required to fix the upper wall panel 22 to the ceiling section 11 while supporting all of its load.

[0095] The upper wall panel 22 is large and heavy, so not having to support the upper wall panel 22 significantly reduces the workload. This reduction in workload also makes it easier to align and secure the upper wall panel 22, reducing the overall workload and man-hours required. In other words, the installation of the upper wall panel 22 is simplified and made easier.

[0096] (Effect 2) In the attic unit 6, the wall-receiving bracket 25 may have a first horizontal surface 25a that can be attached to the edge portion 23 on the underside 26 of the ceiling 11, a vertical surface 25b that extends downward from the end of the first horizontal surface 25a, and a second horizontal surface 25c that extends from the lower end of the vertical surface 25b in the opposite direction from the first horizontal surface 25a and engages and holds the upper wall panel 22. This allows the wall-receiving bracket 25 to be easily installed on the ceiling 11 by attaching the first horizontal surface 25a to the edge portion 23 on the underside 26 of the ceiling 11. The second horizontal surface 25c is positioned lower than the first horizontal surface 25a by the vertical surface 25b, forming a cantilevered hook. Therefore, by placing the top of the upper wall panel 22 on the second horizontal surface 25c, the upper wall panel 22 can be engaged and held in the vertical direction 24 by the wall-receiving bracket 25. Therefore, it is possible to obtain a wall receiving bracket 25 that functions effectively with a simple structure.

[0097] (Effect 3) In the attic unit 6, the vertical surface portion 25b may have a clearance 41 between the top of the upper wall panel 22 engaged and held by the second horizontal surface portion 25c and the underside 26 of the ceiling portion 11. This allows the clearance 41 of the vertical surface portion 25b to engage and hold the upper wall panel 22 to the second horizontal surface portion 25c when the top of the upper wall panel 22 is placed on the top surface of the second horizontal surface portion 25c so as not to damage the underside 26 of the ceiling portion 11.

[0098] By providing the clearance 41, the upper wall panel 22 is lifted up by the amount of the clearance 41 from the locked and held state described above and pressed against the underside 26 of the ceiling portion 11, thereby fixing the upper wall panel 22. At this time, the upper wall panel 22 is positioned in the up-down direction 24 and inward-outward directions. Since the clearance 41 only needs to be small, even if there is clearance 41, the upper wall panel 22 does not need to be lifted much when fixed, and fixing and positioning are easy, so there is no particular problem.

[0099] (Effect 4) In the attic unit 6, the second horizontal surface portion 25c may have a length 52 substantially equal to the thickness 51 of the panel frame 31 of the upper wall panel 22. This allows the length 52 of the second horizontal surface portion 25c to serve as a reference for aligning the upper wall panel 22 in the perpendicular direction. Then, the upper panel frame 31 of the upper wall panel 22 is placed on the second horizontal surface portion 25c and engaged and held by the second horizontal surface portion 25c. Furthermore, the upper wall panel 22 is pushed inward in the perpendicular direction along the second horizontal surface portion 25c so that the upper panel frame 31 abuts against the vertical surface portion 25b. This allows the upper wall panel 22 to be accurately aligned in the perpendicular direction.

[0100] (Effect 5) In the attic unit 6, the wall brackets 25 may be attached to the beams 61 extending in the long side direction 33 of the ceiling portion 11. This allows the upper wall panel 22 to be stably engaged and held via the wall brackets 25 to the beams 61, which are the strongest members of the ceiling portion 11. [Explanation of symbols]

[0101] 6 Attic unit 11 Ceiling 12 pillars 14 Attic space 21 Height 22 Upper wall panel 23 Sides 24 Up and down direction 25 Wall bracket 25a First side part 25b Vertical section 25c Second side part 26 Bottom side 31 Panel Frame 41 Margin 51 Thickness 52 length 33 Long side direction 61 Beam

Claims

1. An attic unit having a ceiling portion having a rectangular shape in a plan view and a support pillar supporting at least a corner portion of the ceiling portion from below, forming an attic space below the ceiling portion, Between adjacent columns, upper wall panels are installed whose height does not reach the lower ends of the columns; Wall receiving brackets are attached to the edges of the ceiling portion so that the upper wall panel can be engaged and held in the vertical direction. The attic unit is characterized in that the upper wall panel is fixed laterally to the wall bracket while being pressed against the underside of the ceiling portion.

2. The attic unit according to claim 1, The wall bracket is a first horizontal surface portion attachable to the edge portion on the lower surface side of the ceiling portion; a vertical surface portion extending downward from an end of the first horizontal surface portion; An attic unit characterized by having a second horizontal surface portion extending from the lower end of the vertical surface portion in the opposite direction to the first horizontal surface portion and engaging and holding the upper wall panel.

3. The attic unit according to claim 2, An attic unit characterized in that the vertical surface portion has a clearance between the upper part of the upper wall panel engaged and held in the second horizontal surface portion and the underside of the ceiling portion.

4. The attic unit according to claim 2 or claim 3, An attic unit characterized in that the second horizontal surface portion has a length approximately equal to the thickness of the panel frame of the upper wall panel.

5. The attic unit according to claim 1 or 2, The attic unit is characterized in that the wall bracket is attached to a beam extending in the long side direction of the ceiling portion.

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