Eaves structure

Abstract

To provide an eaves structure that can mainly improve the workability of the eaves extension panel.SOLUTION: The invention relates to an eaves structure in which an eaves extension panel 4 continuous with a roof 3 is installed on the outdoor side 2 of a building 1. The eaves extension panel 4 is supported on its eaves side by a steel eaves beam 12 connecting upper ends of two steel columns 11. The eaves extension panel 4 is supported on its eaves side by a small roof wall 13 provided under the roof 3. The steel eaves beam 12 may be joined to the steel column 11 and eaves extension panel 4 with bolts 21, 22. The bolts 21, 22 may be provided integrally to the steel eaves beam 12.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] This invention relates to an eaves structure.

Background Art

[0002] On the roof of a building, an eaves that projects to the outdoor side is provided. To extend this eaves, there is a structure in which an eaves extension panel is attached to the roof (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the eaves structure described in Patent Document 1 above, the tip side of the eaves extension panel was individually supported from below by a column, so there was room for improvement in terms of constructability, for example.

[0005] Therefore, the main object of the present invention is to contribute to the improvement of the above problems.

Means for Solving the Problems

[0006] In response to the above problems, the present invention is An eaves structure in which an eaves extension panel continuous with the roof is installed on the outdoor side of a building, The eaves extension panel is The tip side is supported by a steel eaves tip beam connecting between the upper ends of two steel columns, and the base side is supported by an eaves wall provided under the roof, characterized by the eaves structure.

Effects of the Invention

[0007] According to the above configuration, the present invention can improve the workability of the eaves extension panel and the like.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6A

Figure 6B

Figure 6C

Figure 6D

Figure 7A

Figure 7B

Figure 7C

Figure 7D

Figure 7E

Embodiments for Carrying Out the Invention

[0009] This embodiment will be described in detail below with reference to FIGS. 1 to 7E.

Example

[0010] <Configuration> This example has the following configuration. As shown in FIG. 1 (FIG. 2), the eaves structure of this example is configured such that an eaves extension panel 4 continuous with the roof 3 of the building 1 is installed on the outdoor side 2 of the building 1.

[0011] Here, the eaves structure is the structure of the eaves portion of the roof 3 of the building 1.

[0012] The building 1 can be of any type, such as wooden, reinforced concrete, or steel frame. The building 1 of this example will be described later. The building 1 is composed of a building body and a roof 3.

[0013] The outdoor side 2 is the side outside the building 1. In contrast, the side inside the building 1 is the indoor side.

[0014] The roof 3 is installed on the upper part of the building 1 so as to cover the entire upper surface of the building 1, and is a planar portion that protects the upper part and the periphery of the building 1 from wind, rain, solar radiation, etc. The roof 3 can be of any type, for example, a substantially horizontal flat roof. In this example, the roof 3 is an inclined roof. The roof 3 may have a projecting portion 5 that slightly projects from the building body to the outdoor side 2 at least partially. This projecting portion 5 serves as an eaves (or veranda).

[0015] The eaves extension panel 4 is a panel for forming an eaves on the building 1 or extending the eaves of the building 1. The eaves extension panel 4 of this example is attached to the tip (eaves tip) of the roof 3 to continuously extend the eaves with the roof 3. The roof 3 to which the eaves extension panel 4 is connected does not need to be provided with a projecting portion 5 at the tip. The eaves extension panel 4 is connected to the roof 3 in a flush state without a step. When the roof 3 is a flat roof, the eaves extension panel 4 is installed substantially horizontally. When the roof 3 is an inclined roof, the eaves extension panel 4 is installed at the same inclination as the roof 3.

[0016] In this embodiment, as shown in FIG. 2, the roof 3 has at least a rafter 3a extending from the upper side (the water upper side H) to the lower side (the water lower side L) of the slope, and a sheathing board 3b attached to the upper surface side of the rafter 3a. The rafter 3a has an eaves beam 3d attached to the end on the water lower side L (the eaves side). The rafter 3a and the eaves beam 3d form a panel frame, and by attaching the sheathing board 3b, the roof finishing material, etc. to the upper surface side of the panel frame, it becomes a roof panel. A solar panel 6 may be attached on the roof 3.

[0017] Further, the eaves extension panel 4 has a structure including a rafter 4a and a sheathing board 4b, substantially the same as the roof 3. Further, an eaves ceiling material 4c is attached to the lower surface side of the rafter 4a as necessary.

[0018] The eaves extension panel 4 has an eaves beam 4d attached to the end on the water lower side L (the eaves side) of the rafter 4a, and an eaves base beam 4e attached to the end on the water upper side H (the eaves base side) of the rafter 4a. The rafter 4a, the eaves beam 4d, and the eaves base beam 4e form a panel frame, and by attaching the sheathing board 4b, the roof finishing material, etc. to the upper surface side of the panel frame and attaching the eaves ceiling material 4c, etc. to the lower surface side of the panel frame, it becomes the eaves extension panel 4.

[0019] The eaves extension panel 4 is attached so as to be continuous with the roof 3, and becomes integral with the roof 3. A solar panel 7 may be attached on the sheathing board 4b. Note that the eaves beam 4d may be used as a nose concealing material, the surface may be covered with a nose tip steel plate, and an eaves gutter 9 may be attached via a gutter support bracket 8.

[0020] Regarding the above configuration, this embodiment may have the following configuration.

[0021] (1) In the eaves structure, As shown in FIG. 3(b), the eaves extension panel 4 may be supported by a steel eaves beam 12 connecting the upper ends of two steel columns 11 on the eaves side. As shown in FIG. 2, the eaves extension panel 4 may be supported by an eaves small wall 13 provided under the roof 3 on the eaves base side.

[0022] Here, the eaves tip side is the underwater side L of the eaves extension panel 4 and its peripheral portion. In this embodiment, the eaves extension panel 4 is supported by a steel eaves tip beam 12 at a position slightly closer to the building 1 than the end of the underwater side L.

[0023] The steel column 11 is a steel column installed to extend in the vertical direction. The steel column 11 is formed of, for example, a long member (square steel pipe) having a hollow square cross-section. The steel column 11 may be formed of, for example, a long member (round steel pipe) having a hollow round cross-section. The steel column 11 is installed on a column foundation 14 formed by casting on the ground. The lower end of the steel column 11 is fixed to the column foundation 14 with anchor bolts 14a. The steel column 11 may be provided with a column cover 15 as necessary to cover the outer periphery with the column cover 15.

[0024] The two steel columns 11 are installed at positions on both sides in the width direction 16 (FIG. 1) of the eaves extension panel 4 with an interval equal to or slightly narrower than the width of the eaves extension panel 4. The two steel columns 11 are installed without another column (intermediate column) or the like in between.

[0025] The steel eaves tip beam 12 is a horizontal steel beam that supports the eaves tip side of the eaves extension panel 4 in the width direction 16. The steel eaves tip beam 12 has a length substantially the same as or longer than the interval between the two steel columns 11.

[0026] The steel eaves tip beam 12 is formed of, for example, a member having a hollow square cross-section and is installed horizontally. The steel eaves tip beam 12 has, for example, a width substantially the same as one side of the steel column 11 and a height substantially the same as or higher than one side of the steel column 11. As shown in FIG. 3(b), the steel eaves tip beam 12 is directly placed and fixed on the upper end of the steel column 11. Then, the eaves extension panel 4 is directly placed and fixed on the steel eaves tip beam 12. Thereby, the eaves extension panel 4 is supported by the steel eaves tip beam 12 and the steel column 11 from below for the load.

[0027] The steel eaves front beam 12 may, if necessary, have a beam cover 17 (Figure 2) attached to cover its outer periphery with the beam cover 17. The beam cover 17 is fixed to the side surface of the steel eaves front beam 12, etc. with fixtures such as drill screws 18.

[0028] The eaves base side is the upper water side H of the eaves extension panel 4 and its peripheral part. In this embodiment, the eaves extension panel 4 has the end of the upper water side H supported by the roof parapet 13.

[0029] The roof parapet 13 is a wall provided on the lower side of the eaves front side part of the roof 3.

[0030] The roof 3 is installed on the roof parapet 13 or on the mounting member 19 installed on the roof parapet 13 in such a way that the end of the lower water side L is slightly retracted indoors from the surface 13a on the outdoor side 2 of the roof parapet 13 so that the overhanging part 5 cannot be formed.

[0031] The eaves extension panel 4 is placed on the step part above the roof parapet 13 or the mounting member 19 where the end of the lower water side L of the roof 3 does not rest. Thereby, the eaves extension panel 4 is supported by the roof parapet 13 from below with the load.

[0032] In this embodiment, the eaves front beam 3d of the roof 3 and the eaves base beam 4e of the eaves extension panel 4 are simultaneously placed on the mounting member 19 installed on the roof parapet 13. The mounting member 19 is made of wood with a width that is approximately the same as or slightly larger than the sum of the thickness of the eaves front beam 3d of the roof 3 and the thickness of the eaves base beam 4e of the eaves extension panel 4.

[0033] Further, the eaves end beam 3d of the roof 3 and the eaves base beam 4e of the eaves extension panel 4 protrude downward beyond the lower surfaces of the roof purlins 3a of the roof 3 and the purlins 4a of the eaves extension panel 4. And the eaves end beam 3d of the roof 3 and the eaves base beam 4e of the eaves extension panel 4 have the downward protruding portions placed on the mounting member 19. Note that the width of the mounting member 19 is narrower than the thickness of the gable wall 13. The mounting member 19 can be made of a single or multiple stacked pieces of wood according to the vertical distance between the upper end of the gable wall 13 and the eaves end beam 3d of the roof 3 and the eaves base beam 4e of the eaves extension panel 4.

[0034] (2) In the above eaves structure, As shown in FIG. 4, the steel eaves end beam 12 may be joined to the steel column 11 and the eaves extension panel 4 with bolts 21 and 22. The bolts 21 and 22 may be provided integrally with the steel eaves end beam 12.

[0035] Here, the bolts 21 and 22 may use independent fastening members, or may be made to be part of the steel eaves end beam 12. In this embodiment, the bolts 21 and 22 are welding bolts extending in the vertical direction. That is, the steel eaves end beam 12 has welding bolts (bolts 21) for joining to the steel column 11 integrally attached by welding in advance at the factory (FIG. 4(b)). Also, the steel eaves end beam 12 has welding bolts (bolts 22) for joining to the eaves extension panel 4 integrally attached by welding in advance at the factory (FIG. 4(a)).

[0036] The bolts 21 on the lower surface of the steel eaves end beam 12 are provided at positions corresponding to the steel column 11. The bolts 22 on the upper surface of the steel eaves end beam 12 may be provided at the same positions as the bolts 21 on the lower surface, or may be installed at positions different from the bolts 21 on the lower surface with respect to the longitudinal direction of the steel eaves end beam 12 (the width direction 16 of the eaves extension panel 4). Thereby, the bolts 22 on the upper surface are prevented from interfering with the purlins 4a positioned directly above the steel column 11.

[0037] The steel column 11 and the eaves extension panel 4 may have through holes 23 and 24 formed in advance at the factory at positions through which the bolts 21 and 22 pass. Thereby, the steel column 11 and the eaves extension panel 4 can be joined (fastened and fixed) vertically to the steel gable end beam 12 with the bolts 21 and 22 and nuts, respectively. By using the bolts 21 and 22 as welding bolts, the workability of joining the steel gable end beam 12 to the steel column 11 and the eaves extension panel 4 is improved. Also, the positioning of the steel gable end beam 12 with respect to the steel column 11 and the eaves extension panel 4 becomes easy.

[0038] (3) In the above eaves structure, The eaves extension panel 4 may have a structural joint member 32 on the gable end side via a rafter receiving spacer 31. The steel gable end beam 12 may be joined to the structural joint member 32 with the bolt 22.

[0039] Here, the rafter receiving spacer 31 is a regulating member that is locally attached to the structural joint member 32 and receives the rafter 4a of the eaves extension panel 4 from below. The rafter receiving spacer 31 is attached at a position between the lower surface of the rafter 4a of the eaves extension panel 4 and the upper surface of the structural joint member 32 to fill the gap therebetween. The rafter receiving spacer 31 is preferably provided for substantially all the rafters 4a located above the structural joint member 32. However, the structural joint member 32 may be configured not to provide the rafter receiving spacer 31 at the positions of some of the rafters 4a. The upper side of the position without the rafter receiving spacer 31 of the structural joint member 32 becomes an empty space.

[0040] When the eaves extension panel 4 is inclined, the rafter receiving spacer 31 is formed in a substantially right triangle shape when viewed from the side so as to receive the inclined eaves extension panel 4. The rafter receiving spacer 31 is configured, for example, by laminating a plurality of thin plates so that the lower surface is horizontal and an inclined surface adapted to the inclination of the eaves extension panel 4 is formed on the upper side.

[0041] The structural joint member 32 is a member that is located directly above the steel eaves beam 12 on the lower surface of the eaves extension panel 4 when the eaves extension panel 4 is installed so as to be continuous with the roof 3. The structural joint member 32 extends horizontally along the steel eaves beam 12 over substantially the entire width direction 16 of the eaves extension panel 4, and substantially the entire lower surface thereof is in surface contact with the upper surface of the steel eaves beam 12. The structural joint member 32 preferably has substantially the same width as the steel eaves beam 12 and overlaps the steel eaves beam 12 over the entire width. The through holes 24 for passing the bolts 22 of the steel eaves beam 12 are formed to penetrate the structural joint member 32 in the vertical direction. Note that the structural joint member 32 only needs to have a length that is substantially the same as the interval between the steel columns 11 at least.

[0042] The structural joint member 32 is, for example, nailed or bolted to the side surface of the rafter 4a or the like by a wood fixing hardware such as a hurricane tie 33 (Fig. 4(a)). Also, the structural joint member 32 is, for example, nailed or bolted to the side surface of the rafter 4a or the like by a wind stopping hardware such as a TS hardware 34 (Fig. 4(b)).

[0043] Note that when the eaves ceiling member 4c is attached to the lower surface of the eaves extension panel 4, the eaves extension panel 4 is divided into an upper water side H and a lower water side L at the positions where the rafter receivers 31 and the structural joint member 32 are installed. And, around the position where the eaves ceiling member 4c is divided, receiving bars 35a to 35c are appropriately provided so as to fix the end portions of the divided eaves ceiling member 4c. The eaves ceiling member 4c is attached to at least one of the upper water side H and the lower water side L of the structural joint member 32 using the receiving bars 35a to 35c.

[0044] On the other hand, as shown in Fig. 5, for the eaves extension panel 4, its eaves base beam 4e is directly or indirectly abutted against the eaves beam 3d of the roof 3 via a thin plywood or the like serving as a spacer 36. And, the eaves base beam 4e of the eaves extension panel 4 is fixed to the eaves beam 3d of the roof 3 substantially perpendicularly by nails 37 (Fig. 5(a)) from the outdoor side 2 on site.

[0045] In addition, the eaves base beam 4e of the eaves extension panel 4 is connected and fixed approximately perpendicularly to the eaves tip beam 3d of the roof 3 at the construction site from the outdoor side 2 by joining bolts 38 (Fig. 5(b)). The joining bolts 38 and the nails 37 are installed at different positions with respect to the width direction 16 of the eaves extension panel 4.

[0046] At the construction site, a seated washer 39 is attached to the eaves base beam 4e of the eaves extension panel 4, and a bolt hole communicating with the seated washer 39 is formed through the eaves tip beam 3d of the roof 3. The eaves base beam 4e and the eaves tip beam 3d are connected by passing the joining bolts 38 between the seated washer 39 and the bolt hole.

[0047] At this time, the sheathing board 4b of the eaves extension panel 4 and the sheathing board 3b of the roof 3 may be made into a detachable portion 41 by locally notching so that the periphery of the portion necessary for the operation of passing the joining bolts 38 is opened. Receiving wood bars 35d, 35e are appropriately provided at the position of the detachable portion 41 so that small pieces of the sheathing board 4b and the sheathing board 3b can be temporarily fixed and permanently fixed. The receiving wood bar 35d is provided in the vicinity of the receiving wood bar 35f for attaching the end of the upper side H of the eaves ceiling member 4c on the lower surface side of the eaves extension panel 4.

[0048] The joining of the eaves base beam 4e of the eaves extension panel 4 and the eaves tip beam 3d of the roof 3 by such nails 37 or joining bolts 38 is performed at least at two locations or more on both sides in the width direction 16 of the eaves extension panel 4.

[0049] Note that an eaves base sheet 42 having waterproofness is pre-attached at the factory to the end of the upper side H of the eaves ceiling member 4c. Also, a wall upper sheet 43 having waterproofness is pre-attached at the factory to the upper part of the surface 13a on the outdoor side 2 of the roof parapet 13. Then, by installing the eaves extension panel 4 on the roof parapet 13, the eaves base sheet 42 and the wall upper sheet 43 are overlapped at the construction site, and the overlapped portion is hidden and sealed by attaching an eaves base molding 44 at the construction site.

[0050] (4) In the above eaves structure, As shown in FIG. 1(b) and FIG. 2, the building 1 may be configured such that the roof unit 52 is installed on the building unit 51. The eaves extension panel 4 may be continuous with the roof 3 of the roof unit 52.

[0051] Here, the building unit 51 is a rectangular parallelepiped-shaped unit building structure for constructing a unit building. The unit building is a building 1 that can be constructed in a short period of time by transporting the prefabricated building unit 51 to the site and assembling it on site. The building unit 51 forms a living space and the like inside.

[0052] The roof unit 52 is a unit roof structure for forming the roof 3 on the unit building by being installed on the building unit 51, and is prefabricated in a factory. The roof unit 52 forms an attic space and the like inside. The roof unit 52 is, for example, a structure in which a panel (roof panel) constituting the roof 3 is attached to the upper surface of a frame body 52a formed to have substantially the same outer shape as the building unit 51. At least the side surface on the outdoor side 2 of the frame body 52a is the roof parapet 13.

[0053] The roof parapet 13 is formed as a wall panel in which an outer wall material is attached to the surface 13a on the outdoor side 2 of the panel frame 13b (FIG. 2). The outer wall material of the roof parapet 13 is continuous with the outer wall material attached to the surface 51a on the outdoor side 2 of the building unit 51 in a flush state in the vertical direction. A horizontal molding is attached on the boundary line between the lower edge portion of the outer wall material of the roof parapet 13 and the upper edge portion of the outer wall material of the building unit 51.

[0054] Then, by directly installing the roof unit 52 on the building unit 51 installed on the foundation 53 (building foundation, FIG. 2) cast and formed on the ground, the unit building becomes a single-story building 1. In the single-story building 1, the building unit 51 and the frame body 52a of the roof unit 52 form the building body. Note that the foundation 53 and the column foundation 14 are formed at separate positions.

[0055] By being continuous with the roof 3 of the roof unit 52, the eaves extension panel 4 extends integrally with the roof 3 of the roof unit 52 to the outdoor side 2 and covers a wide area of the ground. As a result, the unit building becomes a simple and large-roofed one-story building 1 with an elegant appearance.

[0056] (5) In the above eaves structure, as shown in Fig. 1(a), The eaves extension panel 4 may be formed in a size that matches the roof 3 of the building unit 51(C) adjacent in the width direction 16.

[0057] Here, the building units 51 adjacent in the width direction 16 are the building units 51(C) that are located in the width direction 16 of the eaves extension panel 4 and have a roof 3 adjacent to the eaves extension panel 4.

[0058] The building 1 may be formed, for example, by combining three building units 51(A) to 51(C) in a substantially L-shape in plan view. In this case, with the building unit 51(A) as a reference, the building unit 51(B) is adjacent to the building unit 51(A) side by side horizontally. Then, with respect to the horizontally arranged building units 51(A) and 51(B), the building unit 51(C) is arranged side by side on the side of the building unit 51(B). As a result, the building unit 51(C) is in a state of protruding with respect to the building unit 51(A). Then, on the building units 51(A) to 51(C), roof units 52(A) to 52(C) are installed respectively.

[0059] Then, on the outdoor side 2 of the building unit 51(A), a portion without the building unit 51 (uninstalled portion) is formed at a position adjacent to the building unit 51(C). The eaves extension panel 4 is installed in this uninstalled portion. Thereby, the eaves extension panel 4 is connected to the inclined roof 3 above the building unit 51(A) to form the lower part of the continuous inclined roof. At the same time, the eaves extension panel 4 is installed flush with the inclined roof 3 above the building unit 51(C) in a side-by-side state. The side surface of the eaves extension panel 4 is connected to the side surface of the inclined roof 3 above the building unit 51(C). At this time, at least in the portion connecting the roof units 52(A) and 52(C), the overhanging portion 5 is not formed so as not to interfere with the connection of the eaves extension panel 4.

[0060] The size adapted to the adjacent building unit 51 is such that the eaves tip side end of the eaves extension panel 4 is continuous and in a straight line with the eaves tip side end of the roof 3 above the adjacent building unit 51(C). Thereby, the eaves extension panel 4 has a size approximately the same as the outer shape of the building unit 51, or approximately the size of one roof 3 of the roof unit 52, or a size larger than that. Between the eaves tip side end of the eaves extension panel 4 and the eaves tip side end of the roof 3 above the adjacent building unit 51(C), the eaves gutter 9 is installed so as to pass through in a straight line.

[0061] <Function> The function of this embodiment is as follows.

[0062] Hereinafter, the eaves structure will be described separately for the manufacturing process of the eaves extension panel 4 in the factory and the construction process of the eaves extension panel 4 at the site.

[0063] In the manufacturing process of the eaves extension panel 4 in the factory, first, as shown in FIG. 6A, the frame portion (panel frame) of the eaves extension panel 4 is manufactured by the vertical member 4a, the eaves tip beam 4d, and the eaves base beam 4e (frame portion manufacturing process).

[0064] The production of the eaves extension panel 4 may be carried out using, for example, equipment for manufacturing the roof unit 52 (roof unit manufacturing equipment). The eaves extension panel 4 is manufactured using, for example, a gantry 61 for manufacturing the roof 3 (roof panel) of the roof unit 52 and a jig 62. The jig 62 is placed on the gantry 61 for use, for example, having a support portion in a triangular shape in side view that is approximately the same angle as the inclinations of the roof 3 and the eaves extension panel 4.

[0065] The purlins 4a are installed in parallel on the gantry 61 with a spacing in the width direction 16, and the ends of the purlins 4a on the eaves tip side are connected by an eaves tip beam 4d, and the ends of the purlins 4a on the eaves base side are connected by an eaves base beam 4e to form a frame portion that is substantially rectangular in plan view. The purlins 4a are installed on both sides and the inside of the frame portion. The purlins 4a are installed so as to be present at least directly above the steel column 11. A structural joint member 32 is attached to the lower surface of the portion on the eaves tip side of the purlin 4a via a purlin receiving spacer 31. It is preferable that the purlin 4a to which the purlin receiving spacer 31 is attached has substantially the same dimensions in the width direction 16 as the steel column 11. In this case, for the purlin 4a, for example, a plate material with a larger thickness than other purlins 4a may be used, or a plurality of plate materials may be stacked to increase the thickness. Further, if necessary, receiving wood bars 35a to 35f and other wood bars are installed in the frame portion.

[0066] Next, as shown in FIG. 6B, the eaves extension panel 4 has a field board 4b attached to substantially the entire surface side of the frame portion (field board attachment step). Note that the detachable portion 41 is partially cut out or the like so that a small field board 4b can be detached.

[0067] Then, as shown in FIG. 6C, the eaves extension panel 4 has a waterproof sheet 63, a roof finishing material, etc. laid on the upper surface of the field board 4b attached to the surface side of the frame portion to form the upper surface of the eaves extension panel 4 (waterproof sheet etc. laying step).

[0068] Next, if necessary, as shown in FIG. 6D, the eaves extension panel 4, together with the jig 62, sets up the frame portion to expose the back surface. Then, the eaves extension panel 4 attaches the gable ceiling material 4c to the exposed back side of the frame portion to form the lower surface of the eaves extension panel 4 (gable ceiling material attachment step). For the portions where the rafter supports 31 and the structural joint members 32 are installed, the gable ceiling material 4c is divided so that the rafter supports 31 and the structural joint members 32 are exposed. The gable ceiling material 4c is preferably attached to substantially the entire back surface of the eaves extension panel 4.

[0069] Thus, the eaves extension panel 4 is manufactured at the factory. When installing the solar panel 7, the eaves extension panel 4 is returned to the initial state (lying with the front side facing up) again, and the solar panel 7 is attached to the front side of the eaves extension panel 4. The thus-manufactured eaves extension panel 4 is transported to the site with the jig 62 still attached.

[0070] Next, the construction process of the eaves extension panel 4 at the site is as follows. After installing the building unit 51 and the roof unit 52 on the foundation 53, first, as shown in FIG. 7A, two steel columns 11 are erected on the column foundation 14 (column erection step).

[0071] Furthermore, as shown in FIG. 7B, the two steel columns 11 are horizontally attached so that a steel gable end beam 12 is spanned between their upper ends. Thereby, the two steel columns 11 are connected in a portal shape by the steel gable end beam 12 and integrated (column connection step). When installing the steel gable end beam 12 on the steel column 11, the steel gable end beam 12 passes bolts 21 integrally attached to the lower surface through through-holes 23 pre-formed at the upper ends of the steel columns 11. Thereby, the steel column 11 and the steel gable end beam 12 are positioned and can be easily fastened with nuts. Note that work holes 64 for the fastening operation of the bolts 21 are pre-formed on the side surfaces of the upper end sides of the steel columns 11. The nuts are fastened through the work holes 64. The work holes 64 are preferably formed on the surface of the steel column 11 on the side of the building unit 51(A) so as not to be conspicuous from the outside.

[0072] Next, as shown in FIG. 3(b), the eaves extension panel 4 is lifted by a crane. Suspension wires 65 are attached to the four corners of the eaves extension panel 4 so that it can be easily lifted by the crane. The lifted eaves extension panel 4 is installed between the upper part of the steel eaves tip beam 12 that integrally connects the two steel columns 11 and the upper part of the gable wall 13 of the roof unit 52(A) (eaves extension panel installation step). Thereby, the eaves extension panel 4 is stably temporarily held by the steel eaves tip beam 12 and the gable wall 13.

[0073] At this time, by connecting and integrating the upper ends of the two steel columns 11 with the steel eaves tip beam 12, the steel columns 11 become portal-shaped, so it is possible to stably support the steel columns 11 with fewer personnel, improving workability. On the other hand, as shown in the comparative example of FIG. 3(a), when the two steel columns 11 are not integrated with the steel eaves tip beam 12, the steel columns 11 are in a separate state. Therefore, multiple personnel must support each steel column 11, and since the steel columns 11 are not stable, workability deteriorates.

[0074] And when the structural joint member 32 of the eaves extension panel 4 is installed on the steel eaves tip beam 12, it becomes the state as shown in FIG. 7C. Therefore, the steel eaves tip beam 12 and the structural joint member 32 on the eaves tip side of the eaves extension panel 4 are vertically connected and fixed by bolts 22 integrally attached to the steel eaves tip beam 12 (eaves tip side connection step). At this time, the bolts 22 are installed at at least two positions near both ends in the longitudinal direction of the steel eaves tip beam 12, or at three or more positions including positions therebetween. The fixing of the bolts 22 is performed at a position where there is a free space above between the purlins 4a.

[0075] Also, as shown in FIG. 7D, the eaves extension panel 4 is connected and fixed to the eaves tip beam 3d of the roof 3 with the joining bolts 38 substantially perpendicular to the eaves base beam 4e (eaves base side connection step).

[0076] In addition, as shown in FIG. 7E, the eaves extension panel 4 is fixed to the eaves tip beam 3d of the roof 3 with nails 37 substantially perpendicular to the eaves base beam 4e (eaves base side fixing step).

[0077] At this time, since the eaves extension panel 4 has the eaves base beam 4e placed on the roof parapet 13 of the roof unit 52 or on the attachment member 19 to support the load, it can be stably fixed with the joining bolts 38 and nails 37. The joining bolts 38 and nails 37 are installed at at least two positions near both sides in the width direction 16 of the eaves extension panel 4, or at three or more positions including positions therebetween.

[0078] As described above, the inclined eaves extension panel 4 is installed on the building 1 so as to be continuous with the inclined roof 3 of the building unit 51(A). Then, the area of the roof 3 with respect to the building 1 is enlarged by the eaves extension panel 4.

[0079] In the above, the eaves extension panel 4 is enlarged by making it approximately the same size as the roof 3 of the adjacent building unit 51(C), and the installable area of the solar panels 6 in the entire roof 3 of the building 1 is increased. Therefore, the building 1 can install more solar panels 6 by widely using the roof 3 and the eaves extension panel 4.

[0080] Also, when the eaves extension panel 4 is enlarged, there is a risk that transportation from the manufacturing in the factory to the site of the eaves extension panel 4 will become difficult. However, by deliberately forming the eaves extension panel 4 to be approximately the same size as the roof 3 of the building unit 51, the manufacturing facilities and transportation means of the building unit 51 and the roof unit 52 can be effectively utilized. Therefore, problems in manufacturing and transportation can be solved for the eaves extension panel 4.

[0081] For example, existing jigs 62 used for manufacturing the roof 3 of the roof unit 52 can be used for manufacturing the eaves extension panel 4. Since this jig 62 can also be used for transportation as it is, problems in manufacturing and transportation are solved at once.

[0082] Note that steel columns 11 and steel eaves tip beams 12 are appropriately covered by attaching column covers 15 and beam covers 17 to the outside. Thereby, the appearance of the members supporting the eaves tip side of the eaves extension panel 4 can be improved.

[0083] <Effect> The effects of this embodiment are as follows.

[0084] (Effect 1) For the eaves structure, an eaves extension panel 4 continuous with the roof 3 may be installed on the outdoor side 2 of the building 1. Thereby, the roof 3 of the building 1 can be extended by the eaves extension panel 4.

[0085] At this time, the two steel columns 11 may be connected at their upper ends by a steel gable beam 12. Thereby, the two steel columns 11 are integrated and stabilized. Therefore, the number of personnel supporting the steel columns 11 can be reduced, and the installation of the eaves extension panel 4 onto the steel gable beam 12 becomes easier. Further, by connecting the upper ends of the two steel columns 11 with a steel gable beam 12 having higher strength than wood, the intermediate column between the steel columns 11 can be made unnecessary. Since the steel gable beam 12 can be easily manufactured and used in a cross-sectional shape and size that can obtain the required strength, it is more user-friendly than a wooden beam.

[0086] The eaves extension panel 4 may be supported on the gable side by the steel gable beam 12 and on the eaves base side by an eaves small wall 13 located under the roof 3. Thereby, the eaves extension panel 4 can be stably installed, and the construction of the eaves extension panel 4 at the site is made more efficient. Further, since the eaves extension panel 4 is supported on both the gable side and the eaves base side, it has a structure that allows for enlargement of the panel size.

[0087] (Effect 2) For the eaves structure, the steel gable beam 12 may be joined to the steel column 11 with bolts 21. Thereby, the installation of the steel gable beam 12 to the steel column 11 at the site becomes easier. Further, the steel gable beam 12 may be joined to the eaves extension panel 4 with bolts 22. Thereby, the installation of the eaves extension panel 4 to the steel gable beam 12 at the site becomes easier. Therefore, the workability of the installation on the gable side of the eaves extension panel 4 at the site is improved.

[0088] At this time, the bolts 21, 22 may be integrally attached to the steel gable beam 12 at the factory in advance. Thereby, the positioning work and the attachment work of the steel gable beam 12 to the steel column 11 and the eaves extension panel 4 at the site become easier.

[0089] (Effect 3) The eaves structure may be such that the eaves extension panel 4 has a structural joint member 32 on the eaves tip side via a rafter receiving spacer 31. The steel eaves tip beam 12 may be joined to the structural joint member 32 with bolts 22. The rafter receiving spacer 31 optimally adjusts the attachment position and orientation of the structural joint member 32 with respect to the eaves extension panel 4. Then, a structure that facilitates joining the eaves extension panel 4 to the steel eaves tip beam 12 can be pre-formed at the factory. Therefore, the steel eaves tip beam 12 can be easily joined to the structural joint member 32 with bolts 22 at the site.

[0090] (Effect 4) The eaves structure may be configured by installing a roof unit 52 on a building unit 51 to form a building 1, and attaching an eaves extension panel 4 continuously to the roof 3 of the roof unit 52. Thereby, since the eaves extension panel 4 becomes a large eaves and is continuous with the roof 3, an aesthetically pleasing single-story unit building can be obtained.

[0091] (Effect 5) The eaves structure may be such that the eaves extension panel 4 is sized to match the roof 3 installed on the building unit 51(C) adjacent in the width direction 16. Thereby, the eaves extension panel 4 can be enlarged and aligned with the eaves of the adjacent building unit 51(C). Therefore, the roofs 3 of the single-story unit buildings can be finished with a neat appearance where the end portions on the eaves tip side are aligned in a straight line. Also, as described above, the manufacture and transportation of the eaves extension panel 4 can be carried out in substantially the same manner as those of the building unit 51 and the roof 3.

[0092] And, as described above, the eaves extension panel 4 is sized to be able to install a solar panel 6, and by installing the solar panel 6 on the large eaves extension panel 4 continuous with the roof 3, an increase in the capacity of the solar panel 6 installed on the single-story building 1 can be achieved.

Explanation of Reference Numerals

[0093] 1 Building 2 Outdoor side 3 Roof 4 Eaves extension panel 11 Steel column 12 Steel eaves beam 13 Gable wall 21 Bolt 22 Bolt 31 Rafter support spacer 32 Structural joint material 51 Building unit 52 Roof unit

Claims

1. A eaves structure in which an eaves extension panel continuous with a roof is installed on the outdoor side of a building, wherein the eaves extension panel, the eaves tip side is supported by a steel eaves tip beam connecting between the upper ends of two steel columns, and the eaves base side is supported by an eaves wall provided under the roof, characterized in that it is an eaves structure.

2. The eaves structure according to claim 1, wherein the steel eaves tip beam is bolted to the steel column and the eaves extension panel, and the bolt is integrally provided on the steel eaves tip beam, characterized in that it is an eaves structure.

3. The eaves structure according to claim 2, wherein the eaves extension panel has a structural joint member on the eaves tip side via a rafter receiving spacer, and the steel eaves tip beam is bolted to the structural joint member, characterized in that it is an eaves structure.

4. The eaves structure according to any one of claims 1 to 3, wherein the building has a configuration in which a roof unit is installed on a building unit, and the eaves extension panel is continuous with the roof of the roof unit, characterized in that it is an eaves structure.

5. The eaves structure according to claim 4, wherein the eaves extension panel has a size adapted to the roofs of the building units adjacent in the width direction, characterized in that it is an eaves structure.

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