Roof unit transportation method and roof unit assembly method

Abstract

To provide a transport method of roof units which enables efficient transport by using roof units of the same dimension.SOLUTION: A second eaves side roof unit 20 is made to stand with an angle of 90 degrees with respect to an installation posture to a unit building, in a non-existing state of one small gable wall 12(c) out of both small gable walls 12(c), 12(d). Similarly, a first eaves side roof unit 10 is made to stand with an angle of 90 degrees with respect to an installation posture. Furthermore, an outside surface of a roof panel 11 of the first eaves side roof unit 10 is made to oppose to an inside surface of the roof panel 11 of the second eaves side roof unit 20. Also, an outside surface of one small gable wall 12(b) of the first eaves side roof unit 10 is made to oppose to an inside surface of the small gable wall 12(d) mounted on the second eaves side roof unit 20. Then, the first eaves side roof unit 10 is arranged being overlapped with the inside of the second eaves side roof unit 20. In this state, the first eaves side roof unit 10 and the second eaves side roof unit 20 are transported simultaneously.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a method for transporting roof units and a set of roof units. [Background technology]

[0002] As a method for transporting roof units, a method in which roof units are stacked one inside the other and transported is known (see, for example, Patent Document 1).

[0003] The transportation method of Patent Document 1 uses a first roof unit and a second roof unit as roof units. The first roof unit has a relatively large length in the girder direction sandwiched between the gable walls. The second roof unit has a relatively small length in the girder direction sandwiched between the gable walls. The first roof unit has an open section where the joist panel would normally be attached, and the joist panel is temporarily attached to the back side of the roof panel. The second roof unit is nested and transported through this open section.

[0004] Therefore, compared to transporting each roof unit separately, the roof unit can be transported stably and in a smaller space. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-255257 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the transportation method described in Patent Document 1 required manufacturing roof units with different lengths in the girder direction, which resulted in a larger number of parts and was inefficient compared to manufacturing roof units with the same dimensions.

[0007] The present disclosure has been made in light of the above-mentioned problems, and aims to provide a roof unit transportation method and roof unit set that enable efficient transportation while using roof units of the same dimensions. [Means for solving the problem]

[0008] The disclosed method for transporting roof units includes transporting a first roof unit having end walls on both sides of a roof panel; , with a gable wall on one side of the roof panel and a second roof unit. Only on one side Wife small wall had In this state, the first roof unit is raised at an angle of 90 degrees relative to the installation posture on the building. Furthermore, the first roof unit is raised at an angle of 90 degrees relative to the installation posture. Furthermore, the outer surface of the roof panel of the first roof unit is made to face the inner surface of the roof panel of the second roof unit, To, before Second roof unit One side of On the inner surface of the gable wall attached to , the outer surface of the gable wall on the same side of the first roof unit The first roof unit is then placed inside the second roof unit and transported. The roof unit set disclosed herein also comprises a first roof unit and a second roof unit that are installed adjacent to each other and have gable walls on the sides of the roof panel. The second roof unit has the gable wall only on the side opposite to the side adjacent to the first roof unit. The first roof unit has the gable walls on both sides of the roof panel, and further, the gable wall of the first roof unit on the side adjacent to the second roof unit is connected to the gable wall that can be joined to the roof panel of the second roof unit. [Effects of the Invention]

[0009] In the roof unit transportation method disclosed herein, the second roof unit placed on the outside is transported without one of its two end walls, so the end wall of the first roof unit placed on the inside does not interfere with the end wall of the second roof unit. Therefore, for example, there is no need to limit the girder-direction dimensions of the roof unit placed on the inside to dimensions that do not interfere with the end wall of the outer roof unit, so the girder-direction dimensions of the first roof unit and the second roof unit can be made common. Furthermore, during transportation, the first roof unit and the second roof unit are placed upright and stacked inside and outside, allowing for stable and space-saving transportation. Therefore, in the roof unit transportation method disclosed herein, the dimensions of the roof unit in the girder direction can be made the same, reducing the number of parts and improving manufacturing efficiency, as well as saving space during transportation and improving transportation efficiency. Furthermore, in the roof unit set of the present disclosure, the gable wall removed from the second roof unit can be connected to the first roof unit and transported together with the first roof unit due to the above configuration. Then, when installing on a building, after installing the first roof unit, when installing the second roof unit, if the roof panel is joined to the third gable wall connected to the first roof unit, the second roof unit will have both gable walls. In this way, the gable wall removed from the second roof unit during transportation is transported together with the first roof unit and installed on the building together with the first roof unit, allowing for more efficient transportation and installation than, for example, transporting them independently or installing them on the building. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view showing a roof and a unit building constructed using roof units to which the roof unit transportation method of embodiment 1 is applied. FIG. [Figure 2] FIG. 2 is a perspective view showing a roof unit assembly according to the first embodiment. [Figure 3A]FIG. 10 is an explanatory diagram showing the state before the roof panel is joined to the gable wall fixed to the roof unit when installing the second roof unit to the building unit. [Figure 3B] FIG. 10 is a cross-sectional view showing an outline of the state after the second roof unit has been installed on the building unit. [Figure 4A] FIG. 1 is a plan view showing roof panels of a roof unit installed adjacently on a building body. [Figure 4B] FIG. 4B is a cross-sectional view of the position of the joint plate taken along line S4B-S4B of FIG. 4A. [Figure 5] 6 is an enlarged view of the bolt support fitting portion indicated by K5 in FIG. 3A, or a side view of FIG. 6 as viewed from the direction of arrow Y6. [Figure 6] 6 is a cross-sectional view of the bolt support bracket in Fig. 5, or a cross-sectional view of the bolt support bracket along line S4A-S4A in Fig. 3B. [Figure 7] FIG. 4C is a cross-sectional view similar to FIG. 4B, showing a roof unit according to a second embodiment. [Figure 8] 11 is a perspective view showing a state in which an erection transport jig is attached to a second roof unit according to a third embodiment and the second roof unit is erected. FIG. [Figure 9] 10 is a diagram showing the state in which the second roof unit and the first roof unit are superimposed on each other using an erection transportation jig and transported in a transport vehicle. FIG. [Figure 10] 10 is a perspective view showing the second roof unit, which has been erected by attaching an erection transport jig, being rotated to an installation position. FIG. [Figure 11] FIG. 10 is a perspective view showing the state in which the second roof unit is installed on the transport platform and secured with tie-down ropes. [Figure 12] FIG. 10 is a perspective view showing the state in which the first roof unit is installed inside the second roof unit on the transport platform and secured with tie-down ropes. [Figure 13] FIG. 13 is a perspective view of FIG. 12 as seen from the opposite side. [Figure 14] FIG. 13 is a longitudinal cross-sectional view of FIG. 12 as seen from the side. [Figure 15]FIG. 10 is a diagram showing the state in which the second roof unit and the first roof unit fixed on a transport platform are transported by a transport vehicle. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0012] (Embodiment 1)

[0013] Fig. 1 is an explanatory diagram of the roof RF to be installed on the unit building UB. Fig. 2 is a perspective view showing how the first eave side roof unit 10 and the second eave side roof unit 20 are assembled into a roof unit in order to apply the roof unit transportation method according to the first embodiment. First, the unit building UB and the roof RF will be described using Fig. 1.

[0014] A unit building UB is constructed by installing a roof RF on a building body constructed by combining multiple building units BU. The first eaves side roof unit 10 and the second eaves side roof unit 20 shown in FIG. 2 are used for all or part of the roof RF. For example, the second eaves side roof unit 20 is installed on the building body as shown in FIGS. 3A and 3B. The second eaves side roof unit 20 is then arranged on the building body as shown in FIGS. 4A and 4B.

[0015] (Roof structure and building description)

[0016] As shown in Fig. 1, the building unit BU has a rectangular parallelepiped shape. For example, in the case of a steel-framed building unit BU, the building unit BU has a box-frame rigid frame structure framework (unit frame) inside, which is made up of columns 101, short ceiling beams 102 (ceiling gable beams), long ceiling girder beams 102L, and short floor beams (floor gable beams) and long floor girder beams (not shown).

[0017] Four pillars 101 are erected at the four corners of the building unit BU. Two ceiling beams 102 and two ceiling girder beams 102L are installed parallel to each other, connecting the upper ends of the pillars 101 together in a rectangular shape. Similarly, two floor beams (floor girder beams) and two floor girder beams (not shown) are installed parallel to each other, connecting the lower ends of the pillars 101 together in a rectangular shape. In the building unit BU, a plurality of partition walls 103 are installed parallel to each other between the floor beams (floor girder beams) and ceiling beams 102 (ceiling girder beams) (not shown), and between the floor girder beams and ceiling girder beams 102L (not shown) (FIG. 3A). The girder direction is the short side direction of the building unit BU, and the girder direction is the long side direction of the building unit BU.

[0018] The roof RF is constructed by combining a first eave side roof unit 10 and a second eave side roof unit 20 that form the eaves side portion, and multiple ridge side roof units 30 that form the ridge portion. The first eave side roof unit 10, the second eave side roof unit 20, and the ridge side roof unit 30 are provided in one-to-one correspondence with each building unit BU. For example, the first eave side roof unit 10 and the second eave side roof unit 20 are installed on top of the corresponding building units BU on the top floor, and are arranged adjacent to each other in the girder direction.

[0019] Here, the structure of the ridge-side roof unit 30 is not included in the gist of this disclosure, so a description thereof will be omitted. Below, a description will be given of the first eaves-side roof unit 10 and the second eaves-side roof unit 20 that form the eaves-side portion of the roof RF.

[0020] The first eaves side roof unit 10 is the first roof unit of the present disclosure, and the second eaves side roof unit 20 is the second roof unit of the present disclosure. In the present disclosure, the first eaves side roof unit 10 and the second eaves side roof unit 20 are approximately the same size and approximately the same shape.

[0021] The roof unit assembly is similar to the roof unit assembly shown in FIG. 1, except for the roof unit assembly shown in FIG. 2. The roof unit assembly shown in FIG. 1 is similar to the roof unit assembly shown in FIG. 2, except for the roof unit assembly shown in FIG. 2. The roof unit assembly shown in FIG. 2 is similar to the roof unit assembly shown in FIG. 2. The roof unit assembly shown in FIG. 2 is similar to the roof unit assembly shown in FIG. 2.

[0022] (Explanation of the first roof unit) The eaves side roof units 10, 20 have a roof panel 11 and a pair of gable sills 12 that support the roof panel 11 on the building unit BU. The pair of gable sills 12 are installed in parallel in the girder direction of the building unit BU, with a distance that is approximately the same as the length of the side surface (girder face) of the building unit BU. Each gable sill 12 extends in the gable direction of the building unit BU for approximately the same length as the gable side surface (gable face) of the building unit BU. Each gable sill 12 is installed in a state that is approximately flush with the gable face of the building unit BU.

[0023] As shown in Figure 2, the first eaves side roof unit 10 comprises a roof panel 11 and a pair of triangular gable walls 12(a), 12(b) fixed to the gable side portion on the back side of the roof panel 11, spaced apart in the gable direction.

[0024] Furthermore, a gable siding 12(c) for the second eaves side roof unit 20 is attached to the gable siding 12(b). The gable siding 12(c) is attached to the first eaves side roof unit 10 at the factory, and is installed on top of the building body at the construction site while still attached to the eaves side roof unit 10. Only the gable siding 12(d) is attached to the second eaves side roof unit 20, as will be described later.

[0025] These gable walls 12(a), 12(b), 12(c), and 12(d) have the same basic structure, but when it is necessary to specify one of them due to differences in arrangement, purpose, and function, they are distinguished by adding (a) to (d) to the end of the reference numeral 12. In the following explanation of the gable walls 12(a), 12(b), 12(c), and 12(d), the suffixes (a) to (d) will be omitted when explaining common configurations that are unrelated to the differences in arrangement, purpose, and function.

[0026] <Roof panel explanation> The roof panel 11 is a panel that is rectangular in plan view and is installed diagonally along the slope of the roof RF. The roof panel 11 is formed with a surface that is larger than the planar shape of the building unit BU in order to form protruding parts such as eaves that protrude outdoors relative to the building unit BU. In the figure, the roof panel 11 is larger than the planar shape of the building unit BU because the long side on the eaves side (underwater side) and the short side on the outdoor side become protruding parts. The gable wall 12 is installed closer to the ridge and closer to the interior of the building unit BU, where it does not become a protruding part, relative to the roof panel 11 that has a protruding part.

[0027] The roof panel 11 has a framework structure 111 shown in Figure 1. The framework structure 111 is covered with a sheathing board 112 (see Figure 3B) to form a panel. The sheathing board 112 is attached to the surface (top surface) that will be the upper side of the framework structure 111 when in the installed position. Note that for the entire roof panel 11, the surface on which the sheathing board 112 is attached when in the installed position is the outer surface (top surface) when in the upright position, and the surface on which the sheathing board 112 is not attached when in the installed position is the inner surface (bottom surface) when in the upright position.

[0028] The framework structure 111 has a rectangular frame-shaped periphery and includes a pair of parallel girder trusses 111a, 111a of approximately equal length and a pair of parallel side rafters 111b, 111b of approximately equal length. The pair of girder trusses 111a, 111a and the pair of side rafters 111b, 111b form the rectangular frame-shaped periphery. The pair of girder trusses 111a, 111a are installed in non-parallel orientations so that the ridge side of the panel faces up and down and the eaves side faces perpendicular to the surface of the roof RF when in the installed position.

[0029] A plurality of rafters 111c are arranged parallel to each other at intervals between the pair of girder trusses 111a, 111a, and ends of the rafters 111c are respectively joined and fixed to the pair of girder trusses 111a, 111a. Furthermore, a plurality of cross members 111d are arranged parallel to each other at intervals between the side rafter 111b on the gable side of one (outdoor side) of the framework structural section 111 and the adjacent rafter 111c, and ends of the cross members 111d are respectively joined and fixed to the side rafter 111b on the gable side and the adjacent rafter 111c.

[0030] Furthermore, a short rafter 111e parallel to the rafters 111c is placed between the cross member 111d positioned closest to the eaves and the girder truss 111a on the eaves side. This short rafter 111e is placed in the same position as the gable wall 12(a) in the direction along the ridge (girder direction). The position of this short rafter 111e is approximately the same as the gable face on the outdoor side of the building unit BU.

[0031] A girder structural member 111f is suspended between the short rafter 111e and one (far side) side rafter 111b in the girder direction. As shown in FIG. 3B, this girder structural member 111f is fixed in a suspended state from the short rafter 111e and the side rafter 111b by a hanging bracket 111g. This girder structural member 111f is at approximately the same height as the small wall sill 121 described below, and is positioned so that it abuts or is close to the eaves-side end of the small wall sill 121. The position of this girder structural member 111f is also approximately the same as the side (girder face) of the girder side facing the exterior of the unit building UB. The roof panel 11 of the second eaves-side roof unit 20 has a structure in which the roof panel 11 of the first eaves-side roof unit 10 described above is inverted in the girder direction.

[0032] <Explanation of the gable wall> As already mentioned above, as shown in Figure 2 (also see Figure 1), the first eaves side roof unit 10 has three gable sills 12(a), 12(b), and 12(c), and the second eaves side roof unit 20 has only one gable sill 12(d).

[0033] Here, the gable sills 12(a) and 12(b) are for supporting the roof panel 11 of the first eave side roof unit 10 on the corresponding building unit BU on the top floor of the main building. The gable sills 12(c) and 12(d) are for supporting the roof panel 11 of the second eave side roof unit 20 on the corresponding building unit BU on another top floor of the main building. The building unit BU on which the first eave side roof unit 10 is installed and the building unit BU on which the second eave side roof unit 20 is installed are adjacent in the girder direction.

[0034] In addition, the opposing surfaces of the gable siding 12(a) and 12(b) are referred to as the inner surfaces, and the opposite surfaces are referred to as the outer surfaces. Similarly, the opposing surfaces of the gable siding 12(c) and 12(d) are referred to as the inner surfaces, and the opposite surfaces are referred to as the outer surfaces when installed on the main building body. The gable siding 12(b) of the first eaves side roof unit 10 and the gable siding 12(c) of the second eaves side roof unit 20 are located close to each other, with their outer surfaces facing each other. The gable siding 12(a) of the first eaves side roof unit 10 and the gable siding 12(d) of the second eaves side roof unit 20 are installed at the furthest positions.

[0035] First, the structure common to the gable wall 12 will be described. The gable small wall 12 has an outer shape that is approximately a right-angled triangle and includes a small wall lower frame 121, a small wall vertical frame 122, and a small wall upper frame 123. The small wall lower frame 121, the small wall vertical frame 122, and the small wall upper frame 123 form an outer frame that is approximately a right-angled triangle.

[0036] The small wall vertical member 124 forms the vertical side of the outer frame, which is roughly a right-angled triangle when viewed from the side (along the girder). The small wall lower frame 121 forms the nearly horizontal lower side of the roughly right-angled triangle outer frame and is in contact with the top of the building unit BU. The small wall lower frame 121 extends toward the gable along the gable face of the building unit BU. The small wall upper frame 123 is the hypotenuse of the roughly right-angled triangle outer frame, inclined along the slope of the roof RF, and in contact with the roof panel 11 from below. The small wall upper frame 123 extends toward the gable along the short rafters 111e or side rafters 111b of the roof panel 11. The small wall vertical frame 122 is installed upright between the ridge-side ends of the small wall lower frame 121 and the small wall upper frame 123, and its upper and lower ends are connected to the small wall lower frame 121 and the small wall upper frame 123.

[0037] A plurality of small wall vertical members 124 of different lengths are attached parallel to the small wall vertical frames 122 inside the outer frame at intervals from each other. The small wall vertical members 124 are installed, for example, at positions that are continuous vertically with the studs 103 of the building units BU.

[0038] In the first eaves side roof unit 10, the gable wall 12(a), which is located at the position of the outdoor gable face of the building unit BU, is located at the same position as the short rafter 111e, which is on the indoor side of the one side rafter 111b located closest to the outdoors, and is fixed to the roof panel 11 (its cross member 111d and short rafter 111e).

[0039] On the other hand, the gable wall 12(b) located on the indoor side (center side in the girder direction) of the building unit BU is directly fixed from the bottom up to the other (indoor side) side rafter 111b of the roof panel 11 by nails N1 (round nails or screw nails), as shown in Figure 4B (or Figure 6).

[0040] Furthermore, gable wall 12(b), which is located on the side farther from the exterior gable face of building unit BU, is integrally connected with gable wall 12(c), which supports roof panel 11 of second eaves side roof unit 20, with their outer surfaces facing each other. This connection is made by metal joint plate 13, as shown in the plan view of Figure 4A or the cross-sectional view of Figure 4B.

[0041] That is, between the gable small wall 12(b) and the small wall upper frame 123 of the gable small wall 12(c) located on the side farthest from the outdoor gable face of the building unit BU (indoor side), multiple joint plates 13 (two in this embodiment) are interposed along the gable direction and fixed upward with nails N2. As a result, the gable small wall 12(b) and the small wall 12(c) are fixed parallel to each other with a gap between them. When the eaves-side roof unit 10 is installed on the building unit BU, this small wall 12(c) is positioned so as to overlap the ceiling beam 102 of the lower building unit BU. Furthermore, a filler 14 is provided on the upper surface of the joint plate 13 between adjacent small wall upper frames 123 to partially or entirely fill the gap.

[0042] Furthermore, the small wall upper frame 123 constituting the gable small wall 12(c) is further provided with connecting bolts 125 shown in Figures 5 and 6 near the two small wall vertical members 124 closest to the ridge side and the eaves side. With the upper end of each connecting bolt 125 projecting upward from the small wall upper frame 123, the lower end is supported and fixed to the small wall upper frame 123 by a bolt support bracket 126 (Figure 3B).

[0043] The bolt support fittings 126 are corner fittings attached to the corner formed by the small wall vertical members 124 of the gable small wall 12(c) and the small wall upper frame 123. A plurality of bolt support fittings 126, for example, two in total, are attached to the corner formed by the two small wall vertical members 124 closest to the ridge side and the eaves side and the small wall upper frame 123, in accordance with the positions of the two connecting bolts 125.

[0044] As shown in the partially enlarged side view of Figure 5, the bolt support fitting 126 includes a small wall rafter abutment piece 126a, an upper frame abutment piece 126b, and a reinforcing plate 126c. As shown in the cross-sectional view of Figure 6, the bolt support fitting 126 is a U-section member having a pair of reinforcing plates 126c on both sides of the small wall rafter abutment piece 126a and the upper frame abutment piece 126b.

[0045] The small wall rafter abutment piece 126a has the same width as the small wall vertical member 124, and is fastened horizontally toward the gable end by another bolt 127a and nut 127b while abutting against the side of the small wall vertical member 124.

[0046] The upper frame abutment piece 126b has the same width as the small wall upper frame 123 and abuts against the underside of the small wall upper frame 123. The upper frame abutment piece 126b engages and holds the lower end of the connecting bolt 125, which passes through the small wall upper frame 123 in a direction perpendicular to the surface, via a seat plate, nut, etc. The small wall rafter abutment piece 126a and the upper frame abutment piece 126b are continuous with a bent portion between them.

[0047] The reinforcing plates 126c are integrally provided perpendicular to the surface between both side edges of the small wall rafter abutment piece 126a and both side edges of the upper frame abutment piece 126b. The reinforcing plates 126c connect and reinforce the small wall rafter abutment piece 126a and the upper frame abutment piece 126b. The pair of reinforcing plates 126c are installed approximately flush with both side surfaces of the small wall upper frame 123 and the small wall vertical member 124.

[0048] Furthermore, as shown in FIG. 3A, the small wall upper frame 123 constituting the gable small wall 12(c) is provided with an anti-slip wooden crosspiece 128 on the upper side of the edge on the eaves side.

[0049] (Explanation of the second roof unit) Next, the second eave side roof unit 20 will be described.

[0050] 1 and 2, the second eaves side roof unit 20 comprises a roof panel 11 and a gable siding 12(d). Like the gable siding 12(a) of the first eaves side roof unit 10, the gable siding 12(d) is positioned in the same position as the short rafters 111e, which are located inside the outdoor gable face of the building unit BU in the direction along the ridge (beam direction), and is fixed to the roof panel 11 (the cross members 111d and short rafters 111e).

[0051] As described above, the roof panel 11 has almost the same structure as the roof panel 11 of the first eaves side roof unit 10, except that it is configured by inverting the roof panel 11 in the girder direction. The second eaves side roof unit 20 differs from the roof panel 11 of the first eaves side roof unit 10 in that the side rafters 111b on the side (indoor side) farthest from the outdoor gable face of the building unit BU do not have gable small walls 12(c), but instead have a structure for joining the gable small walls 12(c) at the construction site.

[0052] As shown in FIG. 3A, the roof panel 11 of the second eaves-side roof unit 20 has a structure for connecting to the gable wall 12(c), in which a top tying member 111h is fixed to the lower end of the side rafter 111b on the side farthest from the exterior gable of the building unit BU. The top tying member 111h is positioned flush with the lower end of the side rafter 111b in a recessed notch 111j formed upward along the lower end of the side rafter 111b. The notch 111j extends from the ridge side of the side rafter 111b to a depth approximately equal to the height of the top tying member 111h, extending approximately the same length as the small wall upper frame 123. As shown in FIG. 4B or 6, the top tying member 111h is fixed to the side rafter 111b from bottom to top with nails N3.

[0053] Furthermore, by forming the overall length of the top tying material 111h to be shorter than the overall length of the notch 111j, a recess 111k large enough to accommodate the anti-slip wooden crosspiece 128 is formed in the notch 111j at the lower end of the side rafter 111b. As shown in Figures 4B and 6, the top tying material 111h is arranged with its board surface facing horizontally, so that it is wider than the side rafters 111b, which are arranged with their board surface facing vertically, and protrudes laterally (toward the inner surface) beyond the side rafters 111b. By overlapping the top tying material 111h vertically with a width roughly the same as the small wall upper frame 123, the roof panel 11 is stably supported by a wider surface in contact with the gable small wall 12(c), and a surface suitable for connection through the connecting bolt 125 is formed.

[0054] Furthermore, a washer 111m is provided on the top surface of the head connecting member 111h at a position corresponding to the connecting bolt 125 of the small wall upper frame 123. A through-hole (not shown) for passing the upper end of the connecting bolt 125 is provided in the lower part of the small wall upper frame 123, so as to communicate with the hole in the washer 111m. Also, as shown in FIG. 5, a notch 111n for fastening work is partially formed in a position within the notch 111j at the bottom of the side rafter 111b, above the position where the washer 111m is provided. The notch 111n is formed so as to penetrate laterally between both faces of the side rafter 111b.

[0055] 4A, in the adjacent area where the roof panel 11 of the first eaves side roof unit 10 and the roof panel 11 of the second eaves side roof unit 20 face each other, as shown in FIG. 4B and FIG. 6, inclined sheathing members 113 are attached flush with the top surface of the sheathing boards 112 between the edges of the sheathing boards 112 and the outer surfaces of the upper parts of the side rafters 111b. Therefore, when the sheathing boards 112 are installed, the gap between the two roof panels 11, 11 created by the joint plate 13 is covered from above by the sheathing members 113, 113. As a result, when the sheathing boards 112 are covered with roofing material, the sheathing material can also be supported by the sheathing members 113, 113 in the area between the sheathing boards 112, 112. Furthermore, the expansion members 113, 113 are designed to have a width such that they do not come into contact with each other, but if necessary, a small gap formed between the expansion members 113, 113 may be filled with a spacer S to close the gap, as shown in FIG. 6.

[0057] (Operation of the First Embodiment) Next, as the operation of the first embodiment, a method for transporting and installing the roof unit will be described in order.

[0058] (Roof unit transportation method) When transporting from the factory to the construction site, the first eaves side roof unit 10 and the second eaves side roof unit 20 are transported simultaneously as a single set. In this case, as shown in FIG. 2, both eaves side roof units 10, 20 are placed with the small wall vertical frame 122 and the ridge side girder truss 111a facing downwards, so that they stand upright in an orientation rotated 90 degrees from the orientation in which they are installed on the main building (standing or inverted state). The small wall vertical frame 122 and the ridge side girder truss 111a form the ground contact parts of both eaves side roof units 10, 20 in the standing state. The ground contact parts are the parts located on the underside that come into contact with the ground.

[0059] Then, the second eaves side roof unit 20 and the first eaves side roof unit 10 are overlapped with each other so that the first eaves side roof unit 10 is placed inside the second eaves side roof unit 20.

[0060] Specifically, the inner surface of the roof panel 11 of the second eaves side roof unit 20 faces the outer surface of the roof panel 11 of the first eaves side roof unit 10. The outer surface of the gable wall 12(b) or the inner surface of the gable wall 12(c) attached to the outer surface of the gable wall 12(b) faces the inner surface of the gable wall 12(d). The roof panel 11 of the first eaves side roof unit 10 is then abutted against or brought close to the roof panel 11 of the second eaves side roof unit 20, which has been arranged in this orientation, and the gable wall 12(c) is abutted against or brought close to the gable wall 12(d), thereby overlapping the two eaves side roof units 10, 20. This places the first eaves side roof unit 10 inside the second eaves side roof unit 20, forming a roof unit assembly.

[0061] By assembling the roof units in this way, it is possible to stack a larger number of the eave side roof units 10, 20 and load them in a smaller amount of floor space than if the eave side roof units 10, 20 were transported separately. Also, by standing the eave side roof units 10, 20 upright and abutting the mutually perpendicular small wall vertical frames 122 and the ridge side girder truss 111a against the floor, they can be transported in a stable position.

[0062] In particular, the first eaves-side roof unit 10 can be erected more stably because the multiple small wall vertical frames 122, 122 and the ridge-side girder truss 111a form a U-shaped contact area. In contrast, the second eaves-side roof unit 20 has an L-shaped contact area between a single small wall vertical frame 122 and the ridge-side girder truss 111a. However, the second eaves-side roof unit 20 is also supported by the stable first eaves-side roof unit 10, being adjacent to or abutting the first eaves-side roof unit 10, so by stacking them together, it can achieve the same level of stability as the first eaves-side roof unit 10. Therefore, both eaves-side roof units 10, 20 can be transported efficiently and stably.

[0063] (How to install the eaves side roof unit) When constructing a unit building UB at a construction site, first, a plurality of building units BU are installed on the site to construct the main building body, and then each of the roof units 10, 20, and 30 is installed on each of the corresponding building units BU located on the top floor of the main building body.

[0064] Here, when installing both eave side roof units 10, 20, the first eave side roof unit 10 with the gable wall 12(c) attached is installed first.

[0065] In this case, the first eaves side roof unit 10 is changed from the upright state used during transportation to the installed position, and the small wall sill 121 and girder structural member 111f of the gable small walls 12(a) and 12(b) are fixed to the ceiling beam 102 and ceiling girder beam 102L of the building unit BU. Furthermore, the small wall sill 121 of the gable small wall 12(c) connected to the gable small wall 12(b) of the first eaves side roof unit 10 is fastened and fixed to the ceiling beam 102 of the adjacent building unit BU using joint bolts 129, 129, as shown in Figure 3A. Note that the fixing of the small wall sill 121 of the gable small walls 12(a) and 12(b) to the ceiling beam 102 is also performed by fastening the joint bolts 129, 129, although not shown.

[0066] Next, the second eave side roof unit 20 is installed on the adjacent building unit BU. At this time, the small wall lower frame 121 and girder structural member 111f of the gable small wall 12(d) are similarly fixed to the ceiling beam 102 of the building unit BU with joint bolts 129, 129, but the edge of the roof panel 11 on the side farther from the outdoor gable face of the building unit BU is connected and fixed to the small wall upper frame 123 of the already installed gable small wall 12(c) with connecting bolts 125.

[0067] In this case, as shown in Figures 3A and 3B, the top joints 111h attached to the lower ends of the side rafters 111b of the roof panel 11 of the second eave-side roof unit 20 are placed from above on the small wall upper frame 123 of the gable small wall 12(c). At this time, the anti-slip wooden crosspieces 128 attached to the small wall upper frame 123 are positioned so that they fit into the recesses 111k formed in the side rafters 111b. This prevents the side rafters 111b from falling along the small wall upper frame 123, and they are stably placed and held in an engaged state overlapping the small wall upper frame 123.

[0068] Next, as shown in Figure 6, the upper end of the connecting bolt 125, which is erected from below the small wall upper frame 123, protruding upward from the small wall upper frame 123, is inserted into the head connector 111h and washer 111m, and a nut is attached from above, thereby fastening and fixing the roof panel 11 to the gable small wall 12(c). In this way, the roof panel 11 of the second eaves side roof unit 20 is connected to the gable small wall 12(c). The roof panel 11 of the second eaves side roof unit 20 is easily connected and fixed to the gable small wall 12(c) at the construction site by simply attaching the nut.

[0069] (Effects of the First Embodiment) The effects of the roof unit transportation method and roof unit assembly according to the first embodiment are listed below.

[0070] (1) The method for transporting roof units in the first embodiment involves transporting a first eaves-side roof unit 10, which has gable walls 12(a) and 12(b) on both sides of the roof panel 11, and a second eaves-side roof unit 20. The second eaves-side roof unit 20 is erected at a 90-degree angle relative to the installation orientation on the unit building UB, with one of the gable walls 12(c) and 12(d) missing. The first eaves-side roof unit 10 is then erected at a 90-degree angle relative to the installation orientation. Furthermore, the outer surface of the roof panel 11 of the first eaves-side roof unit 10 faces the inner surface of the roof panel 11 of the second eaves-side roof unit 20, and the outer surface of one gable wall 12(b) of the first eaves-side roof unit 10 faces the inner surface of the gable wall 12(d) attached to the second eaves-side roof unit 20. Then, the first eave side roof unit 10 is placed inside the second eave side roof unit 20 and transported.

[0071] In this way, the second eaves side roof unit 20 placed on the outside does not have one of the gable small walls 12(c), so the first eaves side roof unit 10 placed on the inside does not interfere with the gable small wall 12(c) of the second eaves side roof unit 20. Therefore, there is no longer a need to limit the girder direction dimensions of the roof unit placed on the inside to dimensions that do not interfere with the gable small wall of the outer roof unit, as was done in the past, and the girder direction dimensions of the first eaves side roof unit 10 and the second eaves side roof unit 20 can be made common. Furthermore, the girder direction dimensions of the building unit BU in which both eaves side roof units 10, 20 are installed can also be made common. Therefore, the number of parts can be reduced compared to when the girder direction dimensions of both eaves side roof units 10, 20 are made different.

[0072] Furthermore, during transportation, the first eaves side roof unit 10 and the second eaves side roof unit 20 are placed in an upright position at an angle of 90 degrees to the installation posture and are arranged overlapping each other in the vertical direction in the installation posture, so that the unit can be transported stably and in a space-saving manner.

[0073] Therefore, by standardizing the dimensions of both eave side roof units 10, 20 and the building unit BU, the number of parts can be reduced, improving manufacturing efficiency, and space can be saved during transportation, improving transportation efficiency.

[0074] (2) In the roof unit transportation method of embodiment 1, the first eaves side roof unit 10 and the second eaves side roof unit 20 are arranged adjacent to the main building body of the unit building UB. The second eaves side roof unit 20 has a gable wall 12(d) only on the side opposite to the side adjacent to the first eaves side roof unit 10. The first eaves side roof unit 10 has gable wall 12(a), 12(b) on both sides of the roof panel 11, as well as a third gable wall 12(c) that can be joined to the roof panel 11 of the second eaves side roof unit 20. This gable wall 12(c) is connected to the gable wall 12(b) with its outer surface facing the outer surface of the gable wall 12(b).

[0075] When the two eaves side roof units 10, 20 are stacked and transported, the outer surface of the gable wall 12(b) of the first eaves side roof unit 10 and the inner surface of the third gable wall 12(c) are made to face the inner surface of the gable wall 12(d) of the second eaves side roof unit 20.

[0076] In this way, the gable wall 12(c) joined to the roof panel 11 of the second eaves side roof unit 20 can be transported together with the first eaves side roof unit 10, and when installed in the unit building UB, it can be lifted and installed together with the first eaves side roof unit 10. Therefore, compared to transporting the gable wall 12(c) independently and lifting and installing it, the labor required for transportation, lifting, and installation can be reduced.

[0077] (3) The roof unit set of embodiment 1 consists of a first eaves side roof unit 10 and a second eaves side roof unit 20. The second eaves side roof unit 20 has a gable wall 12(d) only on the side opposite to the side adjacent to the first eaves side roof unit 10. The first eaves side roof unit 10 has gable wall 12(a), 12(b) on both sides of the roof panel 11, and furthermore, a gable wall 12(c) that can be joined to the roof panel 11 of the second eaves side roof unit 20 is connected to the gable wall 12(b) on the side adjacent to the second eaves side roof unit 20.

[0078] When installing the roof unit in the unit building UB, the first eaves side roof unit 10 is installed first, followed by the second eaves side roof unit 20. At this time, if the roof panel 11 of the second eaves side roof unit 20 is joined to the third gable wall 12(c) connected to the first eaves side roof unit 10, the second eaves side roof unit 20 will have both gable walls 12(c), 12(d).

[0079] Therefore, as explained in (2) above, efficient transportation and installation work can be performed.

[0080] (Other embodiments) Next, other embodiments of the present disclosure will be described. In the description of the other embodiments, the same reference numerals as in the above embodiment will be used to designate components common to the above embodiment, and a description thereof will be omitted. Only the differences from the above embodiment will be described.

[0081] (Embodiment 2) Fig. 7 shows embodiment 2. In embodiment 2, the structure of end wall 12(b) and end wall 12(c) and their connecting structure are modified.

[0082] That is, in the first embodiment, the end small wall 12(b) and the end small wall 12(c) are independent and equipped with separate small wall upper frames 123, and are connected by a joint plate 13. In contrast to this, in the second embodiment, the end small wall 12(b) and the end small wall 12(c) are equipped with the same small wall upper frame 200, and the upper parts are integrated.

[0083] Therefore, it is possible to omit the joint plate 13 and the extension member 14, and also to omit the work of connecting the end wall 12(b) and the end wall 12(c). The other configurations, functions and effects are the same as those of the first embodiment.

[0084] (Embodiment 3) Figures 8 to 10 show embodiment 3. In embodiment 3, as shown in Figure 8, an erection transport jig 300 is attached to the roof unit assembly of each of the above embodiments on the side of the second eaves side roof unit 20 where there is no gable wall 12(c) to stabilize the second eaves side roof unit 20 in an erect state. The erection transport jig 300 may have an extension 310 extending from the side of the roof panel 11 along the roof panel 11 to the side opposite the end wall 12(d), and a support leg 320 parallel to the end wall 12(d).

[0085] In the above-described roof unit transportation method, as shown in Fig. 9, when the first eaves side roof unit 10 and the second eaves side roof unit 20 are transported stacked on top of each other, the outer surface of the gable wall 12(b) of the first eaves side roof unit 10 and / or the inner surface of the third gable wall 12(c) are oriented to face the inner surface of the gable wall 12(d) of the second eaves side roof unit 20. In addition, the outer surface of the gable wall 12(a) on the opposite side of the first eaves side roof unit 10 is oriented to face the inner surface of the support leg 320 of the erection transportation jig 300 of the second eaves side roof unit 20. The first eaves side roof unit 10 is then transported stacked on top of the inside of the second eaves side roof unit 20.

[0086] Here, the side without the end wall 12(c) is the side to which the end wall 12(c) cannot be attached during manufacturing or transportation.

[0087] By attaching the erection transport jig 300 to the second eaves side roof unit 20, the second eaves side roof unit 20 can be stably supported in an upright state, and the first eaves side roof unit 10 in an upright state can be stored inside in a stacked state. The erection transport jig 300 is preferably small and lightweight and has the support strength required for transportation. The erection transport jig 300 is detachably attached to the second eaves side roof unit 20 before the second eaves side roof unit 20 is brought into an upright state.

[0088] The extension 310 is attached to the roof panel 11 of the second eaves side roof unit 20, and extends the ground-contact portion of the upright roof panel 11 in the girder direction. The extension 310 extends the ground-contact portion of the second eaves side roof unit 20 in the girder direction so that the overall length in the girder direction, including the second eaves side roof unit 20, is longer than the length in the girder direction of the first eaves side roof unit 10, which has gable walls 12 on both sides.

[0089] When the first eaves side roof unit 10 is installed on the inside of the second eaves side roof unit 20, the roof panel 11 of the second eaves side roof unit 20 and the roof panel 11 of the first eaves side roof unit 10 are installed with a positional offset in the girder direction by at least the thickness of the gable sills 12(b)(c). Therefore, the extension 310 is formed with a larger dimension in the girder direction, taking this offset into consideration.

[0090] The extension 310 is fixed laterally (toward the beam) by nails or screws against the side rafter 111b on the side (indoor side) of the roof panel 11 where the gable wall 12(c) does not exist.

[0091] The support leg 320 is fixed to the extension 310 on the side opposite the roof panel 11. The support leg 320 is added to the ground contact portion of the second eaves side roof unit 20, which is L-shaped when the roof panel 11 and the gable wall 12 are in an upright position, making the ground contact portion U-shaped. It is preferable that the support leg 320 be approximately the same length as the ground contact portion of the gable wall 12.

[0092] The inner surface of the support leg 320 faces the inner surface of the gable wall 12(d) on one side of the roof panel 11 of the second eaves side roof unit 20. When the first eaves side roof unit 10 is stored inside the second eaves side roof unit 20, the inner surface of the support leg 320 faces the outer surface of the gable wall 12(a) of the first eaves side roof unit 10.

[0093] The extension 310 and the support leg 320 are attached so that their contact portions are flush and at approximately right angles to each other to form the erection transportation jig 300. The extension 310 and the support leg 320 may be integrated when the erection transportation jig 300 is attached to the second eaves side roof unit 20, or may be integrated in advance.

[0094] The extension 310 and the support leg 320 may be attached at a fixed angle, or may be attached so that they can be folded (the attachment angle can be changed) using hinges, etc. If the attachment angle is changed, a locking part is provided between the extension 310 and the support leg 320 so that they can be fixed at a right angle when in use.

[0095] It is preferable that the extension portion 310 and the support leg portion 320 have as small dimensions in the girder direction and gable direction (height when in an upright position) as possible within the range that allows the second eaves side roof unit 20 to be stably held in an upright position.

[0096] For example, the dimensions of the extension 310 and the support leg 320 in the gable direction (the vertical direction when upright) are set to be in the range of 1 / 3 to 2 / 3 of the gable direction of the roof panel 11. In the figure, the dimensions of the extension 310 and the support leg 320 in the gable direction are set to be approximately 1 / 2 of the gable direction dimension of the roof panel 11. Furthermore, the dimensions of the extension 310 and the support leg 320 in the gable direction are approximately equal to each other. In this case, the extension 310 and the support leg 320 are attached close to the ridge side (lower side) of the second eaves side roof unit 20 so that they can touch the ground when upright.

[0097] The extension 310 and the support leg 320 may each be formed of a plate-like body, a frame-like body, or a combination of a plate-like body and a frame-like body. In the figure, the extension 310 is a rectangular frame, and the support leg 320 is a trapezoidal frame of approximately the same size and shape as the ridge side portion (the lower portion) of the gable wall 12. The extension 310 and the support leg 320 are formed to be lightweight using thinner frame materials than the roof panel 11 and the gable wall 12, to an extent that the required support strength can be obtained.

[0098] The rectangular frame-shaped extension 310 is in an upright position and is made up of a pair of parallel vertical frame members 311, with multiple horizontal frame members 312 of equal length and parallel to each other attached at intervals above and below between the upper and lower ends and in the middle.

[0099] The trapezoidal frame-shaped support leg 320 is in an upright position and is made up of a pair of non-parallel vertical frame members 321 (arranged in a downward-flaring shape) with multiple parallel horizontal frame members 322 of different lengths attached at intervals above and below between the upper and lower ends and middle parts of the vertical frame members 321.

[0100] The effects of this embodiment will be described below.

[0101] During transportation, the second eaves side roof unit 20 and the first eaves side roof unit 10 are placed in an upright state, and the first eaves side roof unit 10 is placed overlapping the inside of the second eaves side roof unit 20.

[0102] In this case, the second eaves-side roof unit 20, which has a gable wall 12(d) on only one side, has an L-shaped ground contact portion, making it difficult to stand upright and stably on its own. Therefore, in the above-described embodiment, the second eaves-side roof unit 20 is supported by the first eaves-side roof unit 10, which has gable walls 12(a) and (b) on both sides. In this case, if the less stable second eaves-side roof unit 20 is first set upright, the work becomes time-consuming. Therefore, it is more appropriate to first set up the more stable first eaves-side roof unit 10, then set up the second eaves-side roof unit 20 and place it outside the first eaves-side roof unit 10, and then support it with the first eaves-side roof unit 10.

[0103] However, in terms of setup, it is easier to determine the outer position first rather than the inner position. In other words, it is more convenient to first set the second eaves side roof unit 20, which will be the outer one, in an upright position to determine the position of the outer part, and then use the position of the second eaves side roof unit 20 as a reference and store the first eaves side roof unit 10 inside it later.

[0104] Also, for example, if the truss member 330 (Figs. 13 and 14) is already attached to the ridge side of the second eave side roof unit 20, it is necessary to first set the second eave side roof unit 20 in an upright position, and then set the truss member 330 on the ground, and then place the first eave side roof unit 10 on top of the truss member 330. In other words, the installation order may be determined structurally.

[0105] In such cases, by attaching the erection transport jig 300 to the second eaves side roof unit 20, the second eaves side roof unit 20 can be brought into a stable upright position and allowed to stand on its own. Therefore, the second eaves side roof unit 20 can be brought into an upright position first, and the position of the outer portion can be determined. This eliminates the need for the second eaves side roof unit 20 to be supported by the first eaves side roof unit 10. Furthermore, even if a truss member 330 is provided on the ridge side of the second eaves side roof unit 20, the first eaves side roof unit 10 can be placed on top of the truss member 330.

[0106] Furthermore, after transportation, at the construction site, as shown in FIG. 10, the second eaves side roof unit 20, which is in a freestanding state, needs to be rotated to the installation position. In this case, the erection transportation jig 300 can also serve as the rotation fulcrum O. The erection transportation jig 300 rotates at the corner between the vertical frame member 321 on the opposite side of the extension 310 of the support leg 320 and the longest horizontal frame member 322, which serves as the rotation fulcrum O. On the opposite side, the gable wall 12(d) can be used as the fulcrum O, allowing the second eaves side roof unit 20 to rotate stably. After rotating the second eaves side roof unit 20 around the fulcrum O to the installation position, the erection transportation jig 300 is removed from the second eaves side roof unit 20.

[0107] Furthermore, the second eave side roof unit 20 and the first eave side roof unit 10 may be assembled into a roof unit set by being placed in an upright position and loaded in order onto the loading platform 341 of the transport vehicle 340.

[0108] However, as shown in Figures 11 to 14, it is preferable to place the second eaves side roof unit 20 and the first eaves side roof unit 10 in an upright position, mount them on the transport platform 350 so that the first eaves side roof unit 10 is overlapped inside the second eaves side roof unit 20, and secure them to the transport platform 350 with tie-down ropes 360, 370 to form a roof unit assembly.

[0109] As shown in Figure 15, the second eave side roof unit 20 and the first eave side roof unit 10, which are assembled as a roof unit, are loaded onto the loading platform 341 of the transport vehicle 340 together with the transport platform 350 at once, and are secured to the loading platform 341 by securing ropes 342. The securing ropes 342 are separate from the securing ropes 360, 370.

[0110] Here, as shown in Figures 11 to 13, the transport platform 350 is a flat member large enough to mount the second eaves side roof unit 20 and the first eaves side roof unit 10 in an upright position, stacked on the outside and inside. The second eaves side roof unit 20 is mounted while being aligned with one long side of the transport platform 350. A positioning member 351 may be protruded from one long side of the transport platform 350 or near the long side to determine the position of the roof panel 11 of the second eaves side roof unit 20.

[0111] The transport platform 350 may have a string guide 352 attached at an appropriate position for threading the lashing ropes 360, 370. The string guide 352 is attached near the location where the lashing ropes 360, 370 are attached, for example, on one long side of the transport platform 350 or on the positioning member 351 and the opposite long side. The string guide 352 may be pre-installed on the transport platform 350, or may be attached to the transport platform 350 when the second eaves side roof unit 20 and the first eaves side roof unit 10 are secured. A similar string guide 353 may also be attached to the eaves edge of the roof panel 11 of the second eaves side roof unit 20 or the first eaves side roof unit 10, as needed. The string guide 353 can be used to thread the lashing ropes 360, 370 or the wire W.

[0112] Furthermore, as shown in FIG. 14 , a positioning stopper 380 may be attached to the top surface of the transport platform 350 to ensure that the first eaves side roof unit 10 is spaced apart from the second eaves side roof unit 20 so that the first eaves side roof unit 10 does not come into contact with the second eaves side roof unit 20 that was installed first. The stopper 380 is directly fixed to the transport platform 350 at a position along the ground contact portion of the roof panel 11 of the first eaves side roof unit 10. Furthermore, if a truss member 330 is attached to the second eaves side roof unit 20, the stopper 380 may be attached so as to protrude upward from a gap in the truss member 330, or may be attached to the truss member 330. The stopper 380 may be a protruding member. The stopper 380 may be installed detachably.

[0113] Additionally, a cushioning material 390 for preventing interference may be interposed between the upper portions of the second eaves side roof unit 20 and the first eaves side roof unit 10 mounted on the transport platform 350. The cushioning material 390 has a thickness approximately equal to the installation distance between the first eaves side roof unit 10 and the second eaves side roof unit 20. The cushioning material 390 is installed between the portions of the roof panels 11 closer to the eaves edges. This position is a position on the roof panel 11 where the solar cell panel P cannot be attached. The cushioning material 390 is made of a flexible foam-based material, rubber-based material, or the like.

[0114] The first eaves side roof unit 10 mounted on the transport platform 350 may be a small unit that fits inside the second eaves side roof unit 20 (Figure 13), or it may be a unit of approximately the same size but not large enough to fit inside the second eaves side roof unit 20.

[0115] If the first eaves side roof unit 10 cannot be fitted inside the second eaves side roof unit 20, the above-mentioned erection transport jig 300 is attached to the second eaves side roof unit 20, and it is first mounted on the transport platform 350 and secured with tie-down ropes 360, and then the first eaves side roof unit 10 is fitted inside. The first eaves side roof unit 10 is secured together with the second eaves side roof unit 20 to the transport platform 350 with tie-down ropes 370.

[0116] If the first eaves side roof unit 10 is small enough to fit inside the second eaves side roof unit 20, the gable walls 12(c)(d) can be attached in advance to both sides of the roof panel 11 of the second eaves side roof unit 20, so the erection transportation jig 300 is not required. In this case, as long as the stopper 380 is attached to the transportation platform 350 and the truss member 330 or the like is not attached to the second eaves side roof unit 20, the order in which the units are mounted on the transportation platform 350 does not matter. However, it is preferable to mount the second eaves side roof unit 20 first.

[0117] The tie-down ropes 360, 370 are ropes that respectively secure the second eaves side roof unit 20 and the first eaves side roof unit 10. Two tie-down ropes 360 are used to secure the second eaves side roof unit 20 to the transport platform 350 (Fig. 11). Two tie-down ropes 370 are used to secure the first eaves side roof unit 10 to the transport platform 350 (Figs. 12 and 13).

[0118] The tie-down ropes 360, 370 are attached near both ends of the second eaves side roof unit 20 and the first eaves side roof unit 10 in the girder direction, offset in the girder direction so as not to interfere with each other. The tie-down rope 370 is attached more inward than the tie-down rope 360. When tie-downing the second eaves side roof unit 20 and the first eaves side roof unit 10 with the tie-down ropes 360, 370, it is preferable to first stabilize the second eaves side roof unit 20 and the first eaves side roof unit 10 by suspending them with the hoisting wires W.

[0119] The transport vehicle 340 is a vehicle such as a truck of a size that can be used to transport the first eave side roof unit 10 and the second eave side roof unit 20 assembled together on the transport platform 350 from a factory to a construction site.

[0120] The loading platform 341 is a transport platform provided at the rear of the transport vehicle 340 and on which the first eave side roof unit 10 and the second eave side roof unit 20 are mounted.

[0121] The effects of the transport platform 350 will be described below.

[0122] The second eave side roof unit 20 and the first eave side roof unit 10 are placed in an upright position and mounted in sequence on the transport platform 350, and each is secured to the transport platform 350 in the order in which they are mounted with securing ropes 360, 370, and integrated with the transport platform 350 (Figures 11 to 13).

[0123] First, as shown in Figure 11, the second eaves side roof unit 20 is suspended by a crane using a hoisting wire W to put it in an upright position. The second eaves side roof unit 20 suspended in an upright position is then positioned and installed on the transport platform 350. Then, both sides of the second eaves side roof unit 20 are fixed to the transport platform 350 with two tie-down ropes 360. When fixed, the second eaves side roof unit 20 is left suspended by the hoisting wire W to keep it stable.

[0124] Next, as shown in Figures 12 and 13, the first eaves side roof unit 10 is suspended by a hoisting wire W using a crane to put it in an upright position. The first eaves side roof unit 10 suspended in an upright position is installed on the transport platform 350. At this time, the first eaves side roof unit 10 is installed overlapping the inside of the second eaves side roof unit 20. Then, both sides of the first eaves side roof unit 10 are fixed to the transport platform 350 and the second eaves side roof unit 20 with two tie-down ropes 370. When fixed, the first eaves side roof unit 10 is kept suspended by the hoisting wire W to keep it stable.

[0125] In this way, the second eaves side roof unit 20 and the first eaves side roof unit 10, which are large components, can be easily stacked on the outside and inside in an orderly manner based on the transport platform 350, and installed in a stable state.

[0126] Furthermore, by fixing the second eaves side roof unit 20 and the first eaves side roof unit 10 to the transport platform 350 with the tie-down ropes 360, 370, the second eaves side roof unit 20 and the first eaves side roof unit 10 can be firmly fixed and can be handled as a unit after fixing. This also makes it easier to load and unload the second eaves side roof unit 20 and the first eaves side roof unit 10 onto the loading platform 341 of the transport vehicle 340.

[0127] The second eaves side roof unit 20 and the first eaves side roof unit 10 can be stably transported over long distances by loading the transport platform 350 onto the loading platform 341 of the transport vehicle 340. The second eaves side roof unit 20 and the first eaves side roof unit 10 may be installed and fixed on the transport platform 350 which has been loaded onto the loading platform 341 in advance.

[0128] When installing the second eaves-side roof unit 20 and the first eaves-side roof unit 10 on the transport platform 350, the large components obstruct the view, making it difficult to accurately grasp their relative positions during installation. It can also be difficult to make subtle positioning adjustments. However, by providing the transport platform 350 with a positioning stopper 380, the first eaves-side roof unit 10 can be installed relative to the previously installed second eaves-side roof unit 20, relying on the stopper 380. The stopper 380 also makes it easy and possible to accurately install the second eaves-side roof unit 20 and the first eaves-side roof unit 10 on the transport platform 350 with the required spacing so that they do not come into contact with each other.

[0129] Furthermore, by interposing and fixing an interference prevention cushion material 390 between the upper parts of the second eaves side roof unit 20 and the first eaves side roof unit 10 mounted on the transport platform 350, the cushion material 390 can prevent interference between the upper parts of the second eaves side roof unit 20 and the first eaves side roof unit 10. This also makes it possible to prevent damage to the solar cell panels P installed on the roof panels 11 during transport.

[0130] After transport to the construction site, for example, the second eaves side roof unit 20 and the first eaves side roof unit 10 are lowered to the ground from the loading platform 341 of the transport vehicle 340 together with the transport platform 350. Then, the tie-down ropes 360, 370 are removed from the first eaves side roof unit 10 and then the second eaves side roof unit 20, and the second eaves side roof unit 20 and the first eaves side roof unit 10 are separated from the transport platform 350. Furthermore, each unit is lifted up onto the building body all at once or in sequence, and installed side by side on the roof in the order of the first eaves side roof unit 10 and the second eaves side roof unit 20.

[0131] Alternatively, the transport platform 350 may be installed on the building body from the loading platform 341 by detaching the tie-down ropes 360, 370 on the loading platform 341 without lowering the platform 341. The first eave side roof unit 10 and the second eave side roof unit 20 can be rotated from an upright position to an installed position on the ground, or while being lifted or on the building body.

[0132] Other configurations, functions and effects are the same as those of the above-described embodiment 1. Furthermore, the embodiments can be used in appropriate combinations.

[0133] The above has described in detail the embodiments of the roof unit transportation method and roof unit assembly of the present disclosure with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes that do not deviate from the gist of the present invention are included in the present invention.

[0134] In the embodiment, the roof RF is constructed using the ridge-side roof unit 30 and the eave-side roof units 10, 20, and the transportation method and roof unit assembly of the present disclosure are applied to the eave-side roof units 10, 20, but this is not limiting. For example, the roof RF may be divided into roof units at the ridge, without using the ridge-side roof unit 30, and the method may be applied to these roof units.

[0135] In addition, in the embodiment, the ridge side roof unit 30 and the eaves side roof units 10, 20 are sized to correspond one-to-one with each building unit BU, but this is not limited to this, and they may be formed to a size that does not correspond to the building units BU.

[0136] In the embodiment, an example is shown in which one gable wall 12(c) of the second eaves side roof unit 20 serving as the second roof unit is connected to the first eaves side roof unit 10 serving as the first roof unit. However, this one gable wall 12(c) may be transported independently from the first eaves side roof unit 10 and the second eaves side roof unit 20 without being connected to the first eaves side roof unit 10. In this case, the one gable wall 12(c) may be attached to the second eaves side roof unit 20 at ground level after transportation to the construction site. Alternatively, the one gable wall 12(c) may be attached to the first eaves side roof unit 10 at ground level, and then the first eaves side roof unit 10 may be installed on the building body, as in the above embodiment. Furthermore, the one gable wall 12(c) may be installed on the building body alone after the first eaves side roof unit 10 is installed on the building body. [Explanation of symbols]

[0137] 10 First eaves side roof unit 11 Roof Panel 12 Gable wall 12(a) Gable wall 12(b) Tsumakobe 12(c) Tsuma Kokabe 12(d) Tsumakobe 13 Joint plate 20 Second eaves side roof unit 30 Building side roof unit 112 Field board 121 Small wall bottom frame 122 Small wall vertical frame 123 Small wall upper frame 124 Small wall vertical member 125 Connecting bolt 126 Bolt support bracket 300 Standing transport jig 310 Extension 320 Support legs 350 Transport Platform 360 Load-tie rope 370 Cargo rope BU Building Unit RF Roof UB Unit Building

Claims

1. A method for transporting a roof unit, comprising transporting a first roof unit having a roof panel with a gable wall on both sides thereof and a second roof unit having a roof panel with a gable wall on one side thereof, the method comprising: The second roof unit is raised at an angle of 90 degrees relative to its installation position on the building, with the gable wall on only one side of the second roof unit, A method for transporting roof units, in which the first roof unit is raised at an angle of 90 degrees to the installation position, and the outer surface of the roof panel of the first roof unit faces the inner surface of the roof panel of the second roof unit, and the outer surface of the gable wall attached to one side of the second roof unit faces the inner surface of the gable wall on the same side of the first roof unit, and the first roof unit is placed inside the second roof unit and transported.

2. 10. A method for transporting a roof unit according to claim 1, comprising: the first roof unit and the second roof unit are roof units installed adjacent to each other on the building, The second roof unit has the gable wall only on the side opposite to the side adjacent to the first roof unit, The first roof unit has end walls on both sides of the roof panel, and further, in the first roof unit, the end wall on the side where the second roof unit is adjacent is connected to a third end wall that can be connected to the roof panel of the second roof unit, A method of transporting roof units in which, when the first roof unit and the second roof unit are stacked and transported, the outer surface of the end wall of the first roof unit and the inner surface of the end wall of the third roof unit are oriented facing the inner surface of the end wall of the second roof unit.

3. A roof unit set including a first roof unit and a second roof unit that are installed adjacent to each other and have a gable wall on the side of the roof panel, The second roof unit has the gable wall only on the side opposite to the side adjacent to the first roof unit, The first roof unit has a gable wall on both sides of the roof panel, and further, in the first roof unit, the gable wall on the side to which the second roof unit is adjacent is connected to a gable wall that can be connected to the roof panel of the second roof unit.

4. 4. The roof unit assembly according to claim 3, an erection transport jig for stabilizing the second roof unit in an erected state is attached to the side of the second roof unit where the gable wall does not exist; The erection transport jig is a roof unit assembly having an extension extending from the side of the roof panel along the roof panel to the side opposite the end wall, and a support leg parallel to the end wall.

5. The roof unit assembly according to claim 3 or claim 4, The second roof unit and the first roof unit are mounted in an upright position on a transport platform, with the first roof unit stacked on the inside of the second roof unit, and are secured to the transport platform by tie-down ropes to form an integrated roof unit set.

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