Vertical roof connecting structure, roofing material, and vertical roof forming method

Abstract

To provide a coupling structure of roofing materials capable of being easily processed and capable of performing a fitted coupling of the roofing materials each other with excellent workability.SOLUTION: In a coupling structure for a vertically thatching roof, an upper seam 2 in a projecting strip shape and a lower seam 3 in the projecting strip shape into which the upper seam 2 is fitted are provided at both ends of a rectangular plate-like body 1 respectively in each roofing material. An enlarged part 5 having a width greater than that of a residual part 5' is provided at the upper seam 2, and a narrow part 6 having the width smaller than that of a residual part 6' is provided at the lower seam 3. In the vertical direction, the enlarged part 5 of the upper seam 2 of the roofing material situated at a ridge side is fitted, overlapped and coupled to the upper seam 2 of the roofing material situated at an eaves side just by the length of the enlarged part 5, and the lower seam 3 of the roofing material situated at the ridge side is fitted, overlapped and coupled to the narrow part 6 of the lower seam 3 situated at the eaves side just by the length of the narrow part 6, and in the transverse direction, the upper seam 2 of one roofing material is fitted, overlapped and coupled to the lower seam 3 of the other roofing material.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a connecting structure for a vertical roof, a roofing material, and a method for forming a vertical roof. [Background technology]

[0002] In recent years, a panel-shaped vertical roofing material has been proposed, as disclosed in Patent Document 1. This panel-shaped vertical roofing material can be connected by simply fitting the top and bottom seams provided at the widthwise ends of the panel-shaped vertical roofing material into the bottom and top seams of another adjacent vertical roofing material, respectively. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-021240 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the vertical roofing material disclosed in Patent Document 1 is configured such that the ridge-side ends of the lower and upper seams each have a reduced section that is one size smaller than the remaining section, and the horizontal connections are made first, followed by the horizontal connections one row at a time, and the installation towards the ridge side is completed in sequence.

[0005] However, in the case of Patent Document 1, in the lateral (horizontal) connection, the reduced portion of the upper seam portion is fitted over the reduced portion of the lower seam portion, and at the next ridge side step, the remaining portion of the lower seam portion is fitted over the upper seam portion, and at the next step, the remaining portion of the upper seam portion is fitted over the remaining portion of the lower seam portion.

[0006] In other words, the lower seam portion must be fitted over the upper seam portion (reduced portion), which is slightly larger than the lower seam portion, and the reduced portion of the upper seam must be significantly smaller than the remaining portion, which makes the processing more difficult and it is difficult to make the size large enough, making the fitting process more difficult as well.

[0007] The present invention has solved the above-mentioned problems, and aims to provide a connecting structure for vertically roofed roofs, a roofing material, and a method for forming a vertically roofed roof that makes it easy to process roofing materials and enables roofing materials to be connected to each other with good workability. [Means for solving the problem]

[0008] The gist of the present invention will be explained with reference to the accompanying drawings.

[0009] A vertical roof connection structure in which roofing materials are connected vertically and horizontally on a roof substrate, Each of the roofing materials has a rectangular plate-shaped main body 1, and a convex upper seam 2 and a convex lower seam 3 on both the left and right ends of the main body 1. The upper seam 2 has an enlarged portion 5 at its eaves side end that is wider than the remaining portion 5'. The enlarged portion 5 has a length of 10% to 20% of the total length of the upper seam 2, A reduced portion 6 narrower than the remaining portion 6' is provided at the ridge side end of the bottom seam 3, The reduced portion 6 has a length of 10% to 20% of the total length of the bottom seam 3, In the vertical direction, the expanded portion 5 of the upper seam 2 of the roof material located on the ridge side is fitted and connected to the upper seam 2 of the roof material located on the eaves side by the length of the expanded portion 5, and the bottom seam 3 of the roof material located on the ridge side is fitted and connected to the reduced portion 6 of the bottom seam 3 located on the eaves side by the length of the reduced portion 6, In the horizontal direction, the connecting structure of a vertically roofed roof is characterized in that the bottom seam 3 of one roofing material is fitted and overlapped with the top seam 2 of another roofing material.

[0010] The present invention also relates to a connecting structure for a vertically roofed structure, characterized in that in the connecting structure for a vertically roofed structure described in claim 1, the four roofing materials arranged vertically and horizontally have the following connecting structure. Note Roofing material B is adjacent to the vertical ridge side of roofing material A, roofing material C is adjacent to the horizontal side of roofing material A, and roofing material D is adjacent to the horizontal side of roofing material B and the vertical ridge side of roofing material C, and the reduced portion 6 of the bottom seam 3 of roofing material A, the remaining portion 6' of the bottom seam 3 of roofing material B, the remaining portion 5' of the top seam 3 of roofing material C, and the expanded portion 5 of the top seam 3 of roofing material D are overlappingly connected.

[0011] In addition, in the roof material connecting structure described in either claim 1 or 2, the upper seam 2 and the lower seam 3 are inclined surface portions 7 whose upper left and right side portions widen outward in the width direction as they go downward, and the lower end of the inclined surface portion 7 is connected to a folded portion 8 that is folded inward in the width direction.

[0012] In the roof material connecting structure according to claim 3, the upper seam 2 and the lower seam 3 are Lower Goby 3 The reduced portion 6, the remaining portion 6' of the lower seam 3, the remaining portion 5' of the upper seam 2, and Upper Goby 2 When the expansion part 5 is fitted in this order, to be fitted The inclined surface portion 7 of the outer member is be fitted abutting or being close to the inclined surface portion 7 of the inner member, to be fitted The folded portion 8 of the outer member be fitted This relates to a roof material connecting structure characterized in that the inner member is shaped to be prevented from slipping out by the folded portion 8.

[0013] Also, a roofing material for vertical roofs has a rectangular plate-shaped main body 1 with a convex upper seam 2 and a convex lower seam 3 into which the upper seam 2 is fitted, at both left and right ends thereof, and an enlarged portion 5 wider than the remaining portion 5' is provided at the eaves side end of the upper seam 2, The enlarged portion 5 has a length of 10% to 20% of the total length of the upper seam 2, A narrowed portion 6 narrower than the remaining portion 6' is provided at the ridge side end of the bottom seam 3. The reduced portion 6 has a length of 10% to 20% of the total length of the bottom seam 3. The present invention relates to a roofing material characterized by the above features.

[0014] Furthermore, the roofing material described in claim 5 relates to a roofing material characterized in that four of the roofing materials arranged vertically and horizontally are connected as follows. Note (1) Roofing material B is adjacent to the vertical ridge side of roofing material A, and the eaves side end of the bottom seam 3 of roofing material B is fitted and joined to the reduced portion 6 of the roof material A, and the upper seam 2 of this roof material B The expanded portion 5 is fitted and joined to the ridge side end of the upper seam 2 of the roof material A. (2) The roofing material C is adjacent to the horizontal side of the roofing material A, and the upper seam 2 of this roofing material C is The bottom seam 3 of the roof material A and the bottom seam 3 of the roof material B are fitted and connected to the eaves side end portions thereof. It is being done. (3) Roofing material D is adjacent to the horizontal side of roofing material B and the vertical ridge side of roofing material C. The upper seam 2 of this roofing material D is fitted and joined to the lower seam 3 of the roofing material B, The enlarged portion 5 of the upper seam 2 of the roofing material D is fitted onto the ridge side end of the upper seam 2 of the roofing material C. They are polymerically linked.

[0015] Furthermore, in the roofing material described in either claim 5 or 6, the upper hem 2 and the lower hem 3 are inclined surface portions 7 whose upper left and right side portions widen outward in the width direction as they go downward, and the lower end of the inclined surface portion 7 is connected to a folded portion 8 that is folded inward in the width direction.

[0016] In the roofing material according to claim 7, the upper seam 2 and the lower seam 3 are Lower Goby 3 The reduced portion 6, the remaining portion 6' of the lower seam 3, the remaining portion 5' of the upper seam 2, and Upper Goby 2 When the expansion part 5 is fitted in this order, to be fitted The inclined surface portion 7 of the outer member is be fitted abutting or being close to the inclined surface portion 7 of the inner member, to be fitted The folded portion 8 of the outer member be fitted This relates to a roofing material characterized by a shape that prevents it from slipping out by the folded-back portion 8 of the inner member.

[0017] The present invention also relates to a method for forming a vertically thatched roof, characterized in that a roof material having the structure shown in 1 below, in which a rectangular plate-shaped main body 1 has a convex upper seam 2 and a convex lower seam 3 into which the upper seam 2 is fitted, is connected vertically and horizontally as shown in 2 below, on the roof substrate to form a vertically thatched roof. Note 1 The roof material has an enlarged portion 5 at the eaves side end of the upper seam 2 that is wider than the remaining portion 5', The enlarged portion 5 has a length of 10% to 20% of the total length of the upper seam 2, A narrowed portion 6 narrower than the remaining portion 6' is provided at the ridge side end of the bottom seam 3. The reduced portion 6 has a length of 10% to 20% of the total length of the bottom seam 3. . Note 2 The four roofing materials arranged lengthwise and widthwise are connected in the following order (1) to (3). (1) Roofing material B is attached to the vertical ridge side of roofing material A, and the eaves side end of the bottom seam 3 of this roofing material B is attached to the roof. The roofing material B is fitted onto the reduced portion 6 of the base material A, and the expanded portion 5 of the upper seam 2 of the roofing material B is It is joined in a layered manner so that it fits over the ridge side end of the upper seam 2 of the root material A. (2) The roofing material C is placed horizontally on the lateral side of the roofing material A, and the upper seam 2 of this roofing material C is The bottom seam 3 of the roofing material A and the bottom seam 3 of the roofing material B are fitted together so as to be fitted over the eaves side end of the To conclude. (3) The roofing material D is placed on the horizontal side of the roofing material B and on the vertical ridge side of the roofing material C. The upper seam 2 of the base material D is fitted onto the lower seam 3 of the roof material B, and further, The expanded portion 5 of the upper seam 2 is overlapped so as to be fitted onto the ridge side end of the upper seam 2 of the roofing material C. To connect.

[0018] Furthermore, in the method for forming a vertically roofed roof described in claim 9, the upper seam 2 and the lower seam 3 are inclined surface portions 7 whose upper left and right side portions widen outward in the width direction as they go downward, and the lower end of the inclined surface portion 7 is connected to a folded portion 8 that is folded inward in the width direction.

[0019] In the method for forming a vertically roofed structure according to claim 10, the upper seam 2 and the lower seam 3 are Lower Goby 3 The reduced portion 6, the remaining portion 6' of the lower seam 3, the remaining portion 5' of the upper seam 2, and Upper Goby 2 When the expansion part 5 is fitted in this order, to be fitted The inclined surface portion 7 of the outer member is be fitted abutting or being close to the inclined surface portion 7 of the inner member, to be fitted The folded portion 8 of the outer member be fitted This relates to a method for forming a vertically roofed structure characterized in that the inner member has a shape that prevents it from slipping out due to the folded-back portion 8. [Effects of the Invention]

[0020] Since the present invention is configured as described above, it provides a connecting structure for vertically roofed roofs, a roofing material, and a method for forming a vertically roofed roof that makes it easy to process roofing materials and enables roofing materials to be fitted and connected to each other with good workability. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a schematic explanatory perspective view of a roofing material according to an embodiment of the present invention. [Figure 2] 2 is an enlarged schematic plan view of the vicinity of the enlarged portion 5 and a cross-sectional view of the enlarged portion 5 and the remaining portion 5'. FIG. [Figure 3] 2 is an enlarged schematic plan view of the vicinity of the reduced portion 6 and a cross-sectional view of the reduced portion 6 and the remaining portion 6'. FIG. [Figure 4] FIG. 10 is an explanatory diagram of the roof material connecting process. [Figure 5] FIG. 10 is an explanatory diagram of the roof material connecting process. [Figure 6] FIG. 10 is an explanatory diagram of the roof material connecting process. [Figure 7] FIG. 10 is an explanatory diagram of the roof material connecting process. [Figure 8] FIG. 10 is an explanatory diagram of the roof material connecting process. DETAILED DESCRIPTION OF THE INVENTION

[0022] A preferred embodiment of the present invention will be briefly described below, illustrating the operation of the present invention with reference to the drawings.

[0023] A vertically thatched roof is formed by fitting and connecting the roofing material of the present invention lengthwise and crosswise on a roof substrate including a sheathing board and a moisture-permeable waterproof sheet in the following order, for example (see FIG. 4).

[0024] (1) Roofing material B is connected to the vertical ridge side of roofing material A so that the eave side end of the bottom seam 3 of this roofing material B is fitted into the reduced part 6 of roofing material A, and the enlarged part 5 of the eave side end of the top seam 2 of this roofing material B is fitted into the ridge side end of the top seam 2 of roofing material A. When connecting three or more roofing materials vertically, roofing material B' is connected to the ridge side end of roofing material B in the same way.

[0025] (2) Next, roofing material C is connected to the horizontal side of roofing material A so that the upper seam 2 of roofing material C is fitted over the lower seam 3 of roofing material A and the eaves side end of the lower seam 3 of roofing material B.

[0026] (3) Next, roofing material D is placed on the horizontal side of roofing material B and on the ridge side of roofing material C, with the upper seam 2 of roofing material D fitted over the lower seam 3 of roofing material B, and then, as in (1) above, the eave side end of roofing material D is overlap-connected to the ridge side end of roofing material C. When connecting three or more roofing materials vertically, roofing material D' is similarly connected to the ridge side end of roofing material D.

[0027] Thereafter, the steps (2) and (3) are repeated using the roofing material C in (3) as the roofing material A until the roofing material is laid over the entire surface, thereby forming a vertically thatched roof.

[0028] The overlapping portion of the four roofing materials of the vertically roofed structure constructed as described above is formed by stacking the reduced portion 6, the remaining portion 6' of the lower seam 3, the remaining portion 5' of the upper seam 2, and the expanded portion 5 in that order, so that the (smaller size) lower seam 3 is not fitted over the (larger size) upper seam 2, which allows for a generous shape setting, making processing easier and the fitting and connection work more efficiently. [Example]

[0029] Specific embodiments of the present invention will be described with reference to the drawings.

[0030] This embodiment is a connecting structure for a vertical roof, which is constructed by connecting panel-shaped roofing materials for vertical roofing on a roof substrate (not shown) in the slope direction (vertical direction) of the roof, and also connecting them in the horizontal direction perpendicular to this slope direction so that they are laid over the entire surface of the roof.

[0031] Specifically, each of the roofing materials has the same structure and can be made of painted steel sheets, zinc-plated steel sheets, aluminum-zinc alloy-plated steel sheets, stainless steel sheets, etc., approximately 0.3 mm to 0.5 mm thick, which can be appropriately bent or formed.

[0032] In this embodiment, it is desirable to connect two or three roofing materials vertically. For example, instead of preparing panels of a fixed size as in Patent Document 1, the size of each roofing material is appropriately set to a length of approximately 2 m to 7 m and a width (working width) of approximately 300 mm to 455 mm. For example, it is advisable to set the length to approximately 2 m to 3 m so that it can be transported by a small or medium-sized truck, and to configure it so that only the minimum number of roofing materials are connected vertically.

[0033] As shown in Figure 1, the roofing material has a rectangular plate-shaped main body 1 with a convex upper seam 2 at each of its left and right ends and a convex lower seam 3 fitted over the upper seam 2. The eaves-side end of the upper seam 2 has an enlarged section 5 wider than the remaining section 5', and the ridge-side end of the lower seam 3 has a reduced section 6 narrower than the remaining section 6'. In this example, the upper seam 2 is located at the right end and the lower seam 3 at the left end. In the figure, the symbol 9 denotes a laying piece that is located outside the lower seam 3 and is laid on the underside of the rectangular plate-shaped main body 1 of the adjacent roofing material.

[0034] The enlarged portion 5, the reduced portion 6, and the remaining portions 5' and 6' each have the same cross-sectional shape throughout their entire length. A tapered connecting portion may be provided between the enlarged portion 5 and the remaining portion 5', and between the reduced portion 6 and the remaining portion 6'. Figure 2 shows an enlarged view of the vicinity of the enlarged portion 5 and cross-sectional views of the enlarged portion 5 and the remaining portion 5'. Figure 3 shows an enlarged view of the vicinity of the reduced portion 6 and cross-sectional views of the reduced portion 6 and the remaining portion 6'.

[0035] The upper seam 2 (including the expanded portion 5) and the lower seam 3 (including the reduced portion 6) of the roofing material of this embodiment have inclined surface portions 7 on the left and right side surfaces at the top that widen outward in the width direction as they go downward, and a folded portion 8 that folds back inward in the width direction is connected to the lower end of the inclined surface portion 7. In the figure, symbol 10 denotes a rising portion that rises from the center of the rectangular plate-shaped main body 1, and symbol 11 denotes a connecting portion with the laying piece 9.

[0036] Specifically, when the upper seam 2 and the lower seam 3 are fitted over the reduced portion 6, the remaining portion of the lower seam 3, the remaining portion of the upper seam 2, and the expanded portion 5 in this order, the inclined surface portion 7 of the outer member abuts or is close to the inclined surface portion 7 of the inner member, and the folded portion 8 of the outer member is prevented from coming loose by the folded portion 8 of the inner member.

[0037] Furthermore, the upper seam 2 is formed so that the flat top surface of the expanded portion 5 is flush with the flat top surface of the remaining portion 5'. In other words, the expanded portion 5 is slightly expanded in the width direction from the remaining portion 5'. The reduced portion 6 of the lower seam 3 is slightly reduced in overall shape from the remaining portion 6'. Furthermore, the top surface of the reduced portion 6 is flat, and the top surface of the remaining portion 6' is approximately flat with a narrow groove in the center.

[0038] In the vertical direction, the expanded portion 5 of the upper seam 2 of the roofing material located on the ridge side is fitted and connected to the upper seam 2 of the roofing material located on the eaves side by its length, and the reduced portion 6 of the lower seam 3 of the roofing material located on the eaves side is fitted and connected to the lower seam 3 of the roofing material located on the ridge side by its length, and in the horizontal direction, the upper seam 2 of one roofing material is fitted and connected to the lower seam 3 of the other roofing material by its length.

[0039] Although the lengths of the enlarged portion 5 and the reduced portion 6 are the same, they may be different lengths. The enlarged portion 5 and the reduced portion 6 are set shorter than the remaining portions 5' and 6'. For example, the enlarged portion 5 and the reduced portion 6 are set to be approximately 10% to 20% of the total length of the upper seam 2 and the lower seam 3.

[0040] Figure 4 is an explanatory diagram of a single-ply roof with the ridge side facing upward and the eaves side facing downward, starting from the bottom right. In this example, the roof is laid from right to left with the top seam on the right side and the bottom seam on the left side. However, the roof may be laid from left to right with the bottom seam on the right side and the top seam on the left side. It may also be laid from the top left starting point in the opposite direction to the arrow in Figure 4.

[0041] In Figure 4, roofing materials are connected in order starting from roofing material A at the bottom right along the arrows. Both vertical and horizontal connections require not only seam fitting, but also processes such as applying adhesives and waterproofing, but these are well known and will not be explained here.

[0042] (1) The ridge-side end of roofing material A is connected to the eave-side end of roofing material B adjacent to the ridge side of roofing material A, with the eave-side end of the bottom seam 3 of roofing material B fitted into the reduced portion 6 of roofing material A, and the expanded portion 5 of roofing material B fitted into the ridge-side end of the top seam 2 of roofing material A. In this example, three roofing materials are connected vertically, so roofing material B' on the ridge side of roofing material B is also connected to roofing material B in the same way as roofing materials A and B (Figures 5 → 6).

[0043] (2) Next, the upper seam 2 of roof material C, which is adjacent to the lower seam 3 of roof material A, is overlapped and connected to the lower seam 3 of roof material A so that its ridge side end is fitted over the eave side end of the lower seam 3 of roof material B (Figure 6 → Figure 7).

[0044] (3) Next, roofing material D adjacent to roofing materials A, B, and C is overlap-connected so that the top seam 2 of roofing material D is fitted over the bottom seam 3 of roofing material B, and further, as in (1) above, the expanded portion 5 of the top seam 2 of roofing material D is fitted over the ridge-side end of the top seam 2 of roofing material C. In this example, since three roofing materials are connected vertically, roofing material D' on the ridge side of roofing material D is also connected in the same way as roofing materials A, B, C, and D (Figures 7 → 8).

[0045] Thereafter, the steps (2) and (3) are repeated using the roofing material C in (3) as the roofing material A until the roofing material is laid over the entire surface, thereby forming a vertically thatched roof.

[0046] In the vertically roofed structure formed as described above, the portion X where the four roofing materials overlap is as shown in the enlarged cross section of FIG.

[0047] Therefore, in this embodiment, the structure of the portion X where the four roofing materials arranged in a cross-shaped configuration overlap is as follows, and this structure is provided repeatedly.

[0048] (1) The ridge side end of roofing material A is overlapped with the eave side end of roofing material B, which is adjacent to the ridge side of roofing material A, with the eave side end of the lower seam 3 of roofing material B fitted into the reduced portion 6 of roofing material A, and the expanded portion 5 of roofing material B fitted into the ridge side end of the upper seam 2 of roofing material A.

[0049] (2) The bottom seam 3 of roof material A is overlapped with the upper seam 2 of roof material C, which is adjacent to roof material A on the side of the bottom seam 3, with its ridge side end fitted over the lower end of the bottom seam 3 of roof material B.

[0050] (3) With the expanded portion 5 of roof material D adjacent to roof materials A, B, and C fitted onto the ridge side end of the upper seam 2 of roof material C, the upper seam 2 of roof material D is superimposed and connected to the lower seam 3 of roof material B, and the eave side end of roof material D is superimposed and connected to the ridge side end of roof material C.

[0051] Since this embodiment is configured as described above, the reduced portion 6, the remaining portion 6' of the lower seam 3, the remaining portion 5' of the upper seam 2 and the expanded portion 5 are stacked in order, so that the lower seam 3 is not fitted over the upper seam 2, thereby making it possible to set a shape with ample space, which makes processing easier and the fitting connection can be performed with good workability.

[0052] Therefore, this embodiment is easy to process, and the roof materials can be fitted together with good workability. [Explanation of symbols]

[0053] 1. Rectangular plate body 2 Upper goby 3 Lower Goby 5 Enlarged section 5' remainder 6 Reduction section 6' remainder 7 Slope section 8 Folded section

Claims

1. A vertical roof connection structure in which roofing materials are connected vertically and horizontally on a roof substrate, Each of the roofing materials has a rectangular plate-shaped main body with a convex upper seam and a convex lower seam that fits over the upper seam, at both left and right ends thereof. An enlarged portion wider than the remaining portion is provided at the eaves side end of the upper seam, and the enlarged portion has a length of 10% to 20% of the total length of the upper seam, A reduced portion narrower than the remaining portion is provided at the ridge side end of the bottom seam, and the reduced portion has a length of 10% to 20% of the total length of the bottom seam, In the vertical direction, the expanded portion of the upper seam of the roof material located on the ridge side is fitted and overlapped with the upper seam of the roof material located on the eaves side by the length of the expanded portion, and the bottom seam of the roof material located on the ridge side is fitted and overlapped with the reduced portion of the bottom seam located on the eaves side by the length of the reduced portion, A vertically roofed connecting structure characterized in that in the horizontal direction, the bottom seam of one of the roofing materials is fitted over and connected to the top seam of another of the roofing materials.

2. 2. The connecting structure of a vertically thatched roof according to claim 1, wherein the four roofing materials arranged vertically and horizontally have the following connecting structure: Note Roofing material B is adjacent to the vertical ridge side of roofing material A, roofing material C is adjacent to the horizontal side of roofing material A, and roofing material D is adjacent to the horizontal side of roofing material B and the vertical ridge side of roofing material C, and the reduced portion of the bottom seam of roofing material A, the remaining portion of the bottom seam of roofing material B, the remaining portion of the top seam of roofing material C, and the expanded portion of the top seam of roofing material D are overlappingly connected.

3. In the roofing material connecting structure described in either claim 1 or 2, the upper and lower seams are inclined surface portions whose upper left and right side portions widen outward in the width direction as they go downward, and a folded portion that folds back inward in the width direction is connected to the lower end of the inclined surface portion.

4. In the roofing material connecting structure described in claim 3, the upper seam and the lower seam are configured such that when the reduced portion of the lower seam, the remaining portion of the lower seam, the remaining portion of the upper seam, and the expanded portion of the upper seam are fitted together in this order, the inclined surface portion of the fitted outer member abuts or is close to the inclined surface portion of the fitted inner member, and the folded portion of the fitted outer member is prevented from coming loose by the folded portion of the fitted inner member.

5. A roofing material for vertical roofs having a rectangular plate-shaped body with a convex upper seam and a convex lower seam into which the upper seam is fitted at both left and right ends, characterized in that the upper seam has an enlarged section at the eaves side end that is wider than the remaining section, the enlarged section having a length that is 10% to 20% of the total length of the upper seam, and the lower seam has a reduced section at the ridge side end that is narrower than the remaining section, the reduced section having a length that is 10% to 20% of the total length of the lower seam.

6. 6. The roofing material according to claim 5, wherein the roofing material is formed by connecting four of the roofing materials arranged lengthwise and widthwise as follows: Note (1) Roofing material B is adjacent to the vertical ridge side of roofing material A, and the eaves side end of the bottom seam of this roofing material B The roof material A is fitted and joined to the reduced portion of the roof material A, and the expanded portion of the upper seam of the roof material B is fitted and joined to the ridge side end of the upper seam of the roofing material A. (2) The roofing material C is adjacent to the horizontal side of the roofing material A, and the top seam of this roofing material C is The bottom seam of the roofing material A and the bottom seam of the roofing material B are fitted and joined to the eaves side end portions thereof. do. (3) The roofing material D is adjacent to the horizontal side of the roofing material B and the vertical ridge side of the roofing material C. The upper seam of this roofing material D is fitted and joined to the lower seam of the roofing material B, and further, The expanded portion of the upper seam of the roofing material D is fitted and joined to the ridge side end of the upper seam of the roofing material C. It is being done.

7. In the roofing material described in either claim 5 or 6, the upper and lower seams are inclined surface portions whose upper left and right side portions widen outward in the width direction as they go downward, and the lower ends of the inclined surface portions are connected to a folded portion that folds inward in the width direction.

8. In the roofing material described in claim 7, the upper seam and the lower seam are shaped so that when the reduced portion of the lower seam, the remaining portion of the lower seam, the remaining portion of the upper seam, and the expanded portion of the upper seam are fitted in this order, the inclined surface portion of the fitted outer member abuts or is close to the inclined surface portion of the fitted inner member, and the folded portion of the fitted outer member is prevented from coming loose by the folded portion of the fitted inner member.

9. A method for forming a vertically thatched roof, characterized in that a roofing material having the structure described in 1 below, in which a convex upper seam and a convex lower seam into which the upper seam is fitted are provided at both the left and right ends of a rectangular plate-shaped body, are connected lengthwise and widthwise as described in 2 below, to form a vertically thatched roof. Note 1 The roofing material has an expanded portion at the eave side end of the upper seam that is wider than the remaining portion, and the expanded portion has a length that is 10% to 20% of the total length of the upper seam, and a reduced portion at the ridge side end of the lower seam that is narrower than the remaining portion, and the reduced portion has a length that is 10% to 20% of the total length of the lower seam. Note 2 The four roofing materials arranged vertically and horizontally are connected in the following order (1) to (3). (1) Roofing material B is attached to the vertical ridge side of roofing material A, and the eaves side end of the bottom seam of this roofing material B is attached to the roof The roofing material B is fitted over the reduced portion of the roofing material A, and the expanded portion of the upper seam of the roofing material B is fitted over the reduced portion of the roofing material A. It is joined together so that it fits over the ridge end of the upper seam. (2) Place roofing material C on the horizontal side of roofing material A, and the top seam of this roofing material C The bottom seam of A and the bottom seam of the roof material B are overlapped and connected so as to be fitted over the eaves side end of the roof material. 。 (3) The roofing material D is placed on the horizontal side of the roofing material B and on the vertical ridge side of the roofing material C. The upper seam of the base material D is fitted onto the lower seam of the roofing material B, and further, the upper seam of the roofing material D is fitted onto the lower seam of the roofing material B. The enlarged portion of the gable is fitted over and connected to the ridge side end of the upper gable of the roofing material C.

10. 10. A method for forming a vertically roofed roof according to claim 9, wherein the upper and lower seams have inclined surfaces on the left and right sides of their upper parts that widen outward in the width direction as they go downward, and the lower ends of the inclined surfaces are connected to a folded portion that folds inward in the width direction.

11. 11. A method for forming a vertically roofed roof according to claim 10, characterized in that when the reduced portion of the lower seam, the remaining portion of the lower seam, the remaining portion of the upper seam, and the expanded portion of the upper seam are fitted in this order, the inclined surface portion of the fitted outer member abuts or is close to the inclined surface portion of the fitted inner member, and the folded portion of the fitted outer member is prevented from coming off by the folded portion of the fitted inner member.

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