folded roof roof structure

Abstract

To provide a folded-plate roof structure that can be precisely constructed by a construction technique that realizes an arch shape by connecting a plurality of folded-plates.SOLUTION: A folded-plate roof structure 30 is provided with: a plurality of first folded-plates 13 lined from an end of an arch shape toward its top and connected to each other; a plurality of second end folded-plates 13 lined from the other end toward the top and connected to each other; and a top folded-plate 13A connected to a first folded-plate 13B at an end and a second folded-plate 13C at an end. A first connection part 17A of the top folded-plate 13A comprises a first top cutout 101A1 and a second top cutout 101A2 cut out toward the top side, respectively, at those parts connected to first connection parts 17B, 17C of the top folded-plates 13B, 13C A length L2a of the first top cutout 101A1 is longer than a length L1a of a first cutout 101B of the first connection part 17B of the first end folded-plate 13B. A length L2b of the second top cutout 101A2 is longer than a length L1b of a second cutout 101C of the first connection part 17C of the second end folded-plate 13C.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present disclosure relates to a folded plate roof structure, and more particularly to a folded plate roof structure that forms an arch shape. [Background technology]

[0002] A conventional folded-plate roof structure has, for example, multiple folded plates as vertical roofing materials. The multiple folded plates are connected in order from the eaves side to the ridge side in the direction of the roof slope. Specifically, the eaves side end of the folded plate arranged on the ridge side is overlapped from above on the ridge side end of the folded plate arranged on the eaves side (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-139403 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, folded-plate roof structures having an arch shape as a whole have been known for some time. However, Patent Document 1 does not propose a specific method for installing multiple folded plates in an arch shape.

[0005] The present disclosure has been made in consideration of the above reasons, and aims to provide a folded plate roof structure that enables high-precision construction techniques for connecting multiple folded plates to achieve an arch shape. [Means for solving the problem]

[0006] A folded plate roof structure according to one aspect of the present disclosure is an arch-shaped folded plate roof structure. The folded plate roof structure includes a plurality of first folded plates arranged and connected to one another from one end of the arch shape toward an apex, a plurality of second folded plates arranged and connected to one another from the other end of the arch shape toward the apex, and an apex folded plate. The apex folded plate is connected to a first end folded plate located at an end of the first folded plates closer to the apex, and a second end folded plate located at an end of the second folded plates closer to the apex.

[0007] Each of the first end folding plate, the second end folding plate, and the apex folding plate has a first connection portion located at one end in a width direction perpendicular to the length direction along the arch shape, and a second connection portion located at the other end in the width direction.

[0008] The first connection portion of the end first folding plate has a first notch cut out toward the apex at a portion connected to the first connection portion of another first folding plate in order to ensure an overlapping range between the first folding plates.

[0009] The first connection portion of the end second folding plate has a second notch cut out toward the apex at a portion connected to the first connection portion of another second folding plate in order to ensure an overlapping range between the second folding plates.

[0010] The first connection portion of the vertex folding plate has, at a portion connected to the first connection portion of the end first folding plate, a vertex first notch cut out toward the vertex side to ensure an overlapping range with the end first folding plate, and has, at a portion connected to the first connection portion of the end second folding plate, a vertex second notch cut out toward the vertex side to ensure an overlapping range with the end second folding plate.

[0011] The first apex notch is longer in the length direction than the first notch.

[0012] The apex second notch is longer in the length direction than the second notch. [Effects of the Invention]

[0013] According to one aspect of the present disclosure, a folded plate roof structure enables high-precision construction using construction techniques that connect multiple folded plates to create an arch shape. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic perspective view showing one embodiment of a double folded-plate roof structure in which a folded-plate roof structure according to the present disclosure is adopted. [Figure 2] 2A and 2B are perspective views of a folded-plate roof structure constituting a lower roof of the double folded-plate roof structure of the same. [Figure 3] FIG. 3 is a cross-sectional view of a main part of the double folded-plate roof structure. [Figure 4] 4A is a front view of a folded plate provided in the folded plate roof structure of the same, FIG. 4B is a front view showing one state of a horizontal joining operation of the same folded plates, and FIG. 4C is a front view showing one state of a horizontal joining operation of the same folded plates. [Figure 5] FIG. 5 is a perspective view showing one state of the longitudinal joining operation of the folded plates of the embodiment. [Figure 6] FIG. 6 is a perspective view showing one state of the longitudinal joining operation of the folded plates of the above embodiment. [Figure 7] FIG. 7 is a cross-sectional view of a connection portion between the vertically joined folded plates of the same. [Figure 8] 8A and 8B are schematic plan views showing one state of the longitudinal joining operation of the folded plates of the embodiment, respectively; [Figure 9] 9A and 9B are schematic plan views showing one state of the horizontal joining operation of the above folding plates; [Figure 10] FIG. 10 is a schematic plan view showing one state of a longitudinal joint operation between a vertex folded plate provided in the folded plate roof structure and two adjacent folded plates of the same. [Figure 11]FIG. 11 is a schematic plan view showing one state of a longitudinal joint operation between the vertex folded plate and two adjacent folded plates of the same. [Figure 12] FIG. 12 is a perspective view showing one state of a longitudinal joint operation between the vertex folded plate and two adjacent folded plates of the same. [Figure 13] FIG. 13 is a perspective view showing one state of a longitudinal joint operation between the vertex folded plate and two adjacent folded plates of the same. DETAILED DESCRIPTION OF THE INVENTION

[0015] 1. Embodiment (1) Overall structure of the double folded-plate roof structure Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0016] As shown in Fig. 1, the double folded plate roof structure 1 is a structure that forms an arch shape as the roof of a building 100. Here, the "arch shape" is a bow shape, which is a shape consisting of two curves that extend from both ends to the apex. Note that the "arch shape" means a general arch shape, and may include a linear shape in part. Specifically, the radius of curvature of the arch shape is preferably in the range of 250 to 400 m.

[0017] Note that FIG. 1 is a schematic diagram for illustrating that the double folded-plate roof structure 1 has an arch shape as a whole, and details are omitted.

[0018] As shown in Figures 2A and 2B, the double folded-plate roof structure 1 has a lower roof 2 and an upper roof 3. Both the lower roof 2 and the upper roof 3 are constructed of folded-plate roofs. The distance between the lower roof 2 and the upper roof 3 is approximately constant across the entire roof surface. In the following, the roof slope direction is defined as the eaves-ridge direction, and the direction perpendicular to the eaves-ridge direction and along the horizontal plane is defined as the lateral direction. In this embodiment, since the double folded-plate roof structure 1 has an arch shape as a whole as described above, the roof slopes of the lower roof 2 and the upper roof 3 are also arch-shaped.

[0019] In this embodiment, a detailed description will be given of the folded-plate roof structure 30 that constitutes the lower roof 2. Therefore, the description of the upper roof 3 will be simplified.

[0020] (2) Lower roof (2-1) Structure of the lower roof As shown in Fig. 2A, the lower roof 2 is laid on top of a roof underlayment 5. The roof underlayment 5 includes, for example, a purlin 51 and a tight frame 52.

[0021] The lower roof 2 is attached to the tight frame 52. The tight frame 52 extends horizontally and has a width in the eaves-ridge direction, which is perpendicular to its longitudinal direction. The tight frame 52 is fixed onto the main building 51. The length direction of the tight frame 52 is approximately parallel to the longitudinal direction of the main building 51. The tight frame 52 is formed, for example, by bending a strip-shaped metal plate.

[0022] The tight frame 52 has a plurality of mountain-shaped protrusions 53. The plurality of protrusions 53 are arranged in parallel at a constant pitch in the longitudinal direction of the tight frame 52. A retaining clip 54 is fixed to the top of each protrusion 53. The retaining clip 54 secures the lower roof 2 to the tight frame 52. The retaining clip 54 is fixed to the tight frame 52 via fasteners such as bolts and nuts.

[0023] The roof underlayment 5 comprises a plurality of purlins 51. The longitudinal direction of each purlin 51 is approximately parallel to the horizontal direction. The multiple purlins 51 are arranged side by side at intervals in the eaves-ridge direction. The multiple purlins 51 arranged side by side in the eaves-ridge direction are arranged so that the purlins 51 closer to the ridge are positioned higher. Each purlin 51 is made of, for example, H-shaped steel, C-shaped steel, or lipped channel steel.

[0024] As shown in Fig. 2A, the lower roof 2 has a plurality of peaks 11 and a plurality of valleys 12. The peaks 11 and valleys 12 are arranged alternately in the horizontal direction on the lower roof 2. The peaks 11 and valleys 12 each have a length in the eaves-ridge direction.

[0025] The lower roof 2 is composed of a plurality of folded plates 13. The folded plates 13 are metal vertical roofing materials with a generally U-shaped cross section. The plurality of folded plates 13 are connected in multiple directions in the eaves-ridge direction and also in multiple directions in the horizontal direction to form the lower roof 2. In other words, the above-mentioned plurality of peaks 11 and plurality of valleys 12 are composed of a plurality of folded plates 13. More specifically, when focusing on the eaves-ridge direction, an arch shape is formed by connecting the plurality of folded plates 13.

[0026] The folded plate 13 is formed by bending a single metal plate, for example, by roll forming. Examples of metal plates that form the folded plate 13 include painted steel plates, galvanized steel plates, stainless steel plates, Galvalume Steel Plate (registered trademark), and SGL (registered trademark). The multiple folded plates 13 each have the same size, basic shape, etc.

[0027] 2A and 5, the folded plate 13 extends elongatedly in the eaves-ridge direction and has a width in the horizontal direction. Hereinafter, the longitudinal direction of the folded plate 13 will be referred to as the length direction, and the short side direction will be referred to as the width direction.

[0028] The folded plate 13 has a flat portion 14, a pair of standing portions 15, and a pair of connecting portions 16. The flat portion 14 is the portion that forms the bottom surface of the valley portion 12 of the lower roof 2. The flat portion 14 extends long in the eaves-ridge direction and has a width in the horizontal direction. The pair of standing portions 15 extend diagonally upward from both ends of the flat portion 14 in the width direction. The pair of standing portions 15 are inclined so that the distance between them increases as they extend upward. The pair of connecting portions 16 extend approximately horizontally from the upper ends of the pair of standing portions 15 toward the side opposite to the side where the flat portion 14 is provided.

[0029] As shown in FIG. 3, each connection portion 16 is fastened to the connection portion 16 of another laterally adjacent folded plate 13 with a retaining clip 54 interposed therebetween to form a seam fixing portion 21, which is then fixed to the tight frame 52 to form a peak portion.

[0030] 4A to 4C, the pair of connecting portions 16 will be described in detail. The pair of connecting portions 16 has a first connecting portion 17 provided at one end of the folded plate 13 in the width direction, i.e., at the upper end of one of the standing portions 15, and a second connecting portion 18 provided at the other end of the folded plate 13 in the width direction, i.e., at the upper end of the other standing portion 15.

[0031] The first connecting portion 17 has a flat portion 81 extending laterally outward from the upper end of one of the standing portions 15, an outer plate portion 82 raised from the laterally outer end of the flat portion 81, a top plate portion 83 extending laterally inward from the upper end of the outer plate portion 82, and a diagonally bent portion 84 bent laterally outward and diagonally downward from the laterally inner tip of the top plate portion 83.

[0032] The second connecting portion 18 has a flat portion 91 extending laterally outward from the upper end of the other standing portion 15, an inner plate portion 92 standing up from the laterally outer end of the flat portion 91, a top plate portion 93 extending laterally outward from the upper end of the inner plate portion 92, an outer plate portion 94 extending downward from the laterally outer tip of the top plate portion 93, and a flat portion 95 extending laterally outward from the lower end of the outer plate portion 94. With the above configuration, the second connecting portion 18 has a cross-sectional shape that is convex upward.

[0033] As shown in Fig. 5, a notch 101 is formed at the end of the first connecting portion 17 on the eaves side, cutting out toward the ridge side (the apex side of the arch shape). The notch 101 is a portion of the first connecting portion 17 that is formed in the top plate portion 83 and the diagonally bent portion 84, and is missing by a length L1 in the longitudinal direction. As a result, an insertion portion 102 consisting only of the flat portion 81 and the outer plate portion 82 is formed in the first connecting portion 17 and has a length L1. The length L1 is, for example, 200 mm, and is preferably in the range of 150 to 250 mm.

[0034] (2-2) Installation of the lower roof The lower roof 2 is installed and constructed as follows. First, the builder installs the tight frames 52 along the longitudinal direction of the main building 51. The builder installs the tight frames 52 on each main building 51. At this time, the builder positions each tight frame 52 so that the downwardly concave portions between adjacent protrusions 53 of the tight frames 52 installed on each main building 51 are aligned in a straight line in the eaves-ridge direction.

[0035] Next, the builder installs the folded plate 13 on the tight frame 52. The builder installs the folded plate 13 on the multiple tight frames 52 lined up in the eaves-ridge direction, and fits it into the recessed portion below between the protruding portions 53 of each tight frame 52.

[0036] Next, as shown in Figures 5, 6, 8A, and 8B, the contractor vertically splices a new ridge-side folding plate 13 to the already installed folding plate 13 on the ridge side. During the vertical splicing operation, the eave-side end of the new ridge-side folding plate 13 is placed over the ridge-side end of the already installed eaves-side folding plate 13. At this time, the second connection portion 18 of the ridge-side folding plate 13 fits over and covers the second connection portion 18 of the eaves-side folding plate 13 from above. Furthermore, as shown in Figure 7, the insertion portion 102 (flat portion 81 and outer plate portion 82) of the ridge-side folding plate 13 is inserted into the first connection portion 17 of the eaves-side folding plate 13 from below. Therefore, as shown in Figures 6, 8A, and 8B, the eave-side end of the ridge-side folding plate 13 rests on and overlaps the ridge-side end of the eaves-side folding plate 13, creating an overlapping portion 23. At this time, the length L1 of the notch 101 becomes the length of the overlapping portion 23. In this way, the folding plate 13 of this embodiment is provided with the notch 101, which ensures the amount of overlap when multiple folding plates 13 are joined vertically in the eaves-ridge direction, thereby improving the overlapping ability and waterproofing.

[0037] As described above, a plurality of folded plates 13 are installed from one end of the arch shape toward the apex, and a plurality of folded plates 13 are installed from the other end of the arch shape toward the apex.

[0038] Next, as shown in Figures 9A and 9B, the builder places a new folding plate 13 horizontally of the folding plate 13 for which the vertical splice has been completed. In the horizontal splicing work, the builder stacks the adjacent connection portions 16 of two horizontally adjacent folding plates 13 one above the other, and at this time, fixes them to the tight frame 52 with a retaining clip 54 sandwiched between the connection portions 16. Specifically, as shown in Figures 3, 4A, 4B, and 4C, in the horizontal splicing work, the second connection portion 18 of the new folding plate 13 fits into and covers the first connection portion 17 of the existing folding plate 13 from above, and the retaining clip 54 of the tight frame 52 is sandwiched between this second connection portion 18 and the first connection portion 17.

[0039] Finally, the installer wraps the retaining clip 54 around the connection portions 17, 18 of two laterally adjacent folding plates 13 and then bends the connection portions 17, 18 to form the seam fixing portion 21 (i.e., seam fixing) as shown in Figure 3.

[0040] As shown in Figure 9, new folded plates 13 are joined horizontally to each of the existing multiple folded plates 13 lined up in a row using the method described above. The multiple new folded plates 13 that are joined horizontally are then joined vertically using the method described above. As a result, the multiple folded plates 13 are connected in the horizontal and ridge directions, forming a portion of the lower roof 2 that extends from one end of the arch shape toward the apex and a portion that extends from the other end of the arch shape toward the apex.

[0041] The multiple folding plates 13 include multiple first folding plates 13 that are lined up and connected to each other from one end of the arch shape toward the apex, and multiple second folding plates 13 that are lined up and connected to each other from the other end of the arch shape toward the apex. Of the multiple first folding plates 13, those located at the end on the apex side are called end first folding plates 13B, and of the multiple second folding plates 13, those located at the end on the apex side are called end second folding plates 13C.

[0042] The end first folding plate 13B has the same structure as the folding plate 13 described above. The following description will be given with the names and symbols of the components of the end first folding plate 13B corresponding to the folding plate 13. The end first folding plate 13B has a first connection portion 17B located at one end in the width direction and a second connection portion 18B located at the other end in the width direction. The first connection portion 17B has a first notch 101B cut out toward the apex at a portion (the eaves-side end) that connects to the first connection portion 17B of another adjacent first folding plate 13 at one end of the arch shape to ensure an overlapping range between the first folding plates 13. The length of the first notch 101B is L1a.

[0043] The end second folding plate 13C has the same structure as the folding plate 13 described above. The following description will be made by assigning the names and symbols of the components of the end first folding plate 13B to the folding plate 13. The end second folding plate 13C has a first connecting portion 17C located at one end in the width direction and a second connecting portion 18C located at the other end in the width direction. The first connecting portion 17C has a second notch 101C cut out toward the apex at a portion (the eaves-side end) connected to the first connecting portion 17C of another adjacent first folding plate 13 at the other end of the arch shape to ensure an overlapping range between the second folding plates 13. The second notch 101C has a length L1b. In this embodiment, the length L1a of the first notch 101B and the length L1b of the second notch 101C are the same, but they may be different.

[0044] (3) Vertex folded plate The structure and attachment method of the vertex folded plate 13A will be described below with reference to Figures 10 to 12. The first end folded plate 13B and the second end folded plate 13C are connected to each other by the vertex folded plate 13A.

[0045] 10 to 12, the first folding plates 13 other than the end first folding plates 13B and the second folding plates 13 other than the end second folding plates 13C are omitted.

[0046] The vertex folding plate 13A has a similar structure to the previously described folding plate 13. In the following, the names and symbols of the components of the vertex folding plate 13A will be described in correspondence with those of the folding plate 13. The vertex folding plate 13A has a first connecting portion 17A located at one end in the width direction and a second connecting portion 18A located at the other end in the width direction.

[0047] Unlike the other folding plates 13, the vertex folding plate 13A has notches at both longitudinal ends of the first connecting portion 17A. Specifically, the first connecting portion 17A has an vertex first notch 101A1 cut out toward the vertex at a portion (one end) connected to the first connecting portion 17B of the end first folding plate 13B to ensure an overlapping range with the end first folding plate 13B. The length of the vertex first notch 101A1 is L2a, which is longer than the length L1a of the first notch 101B. As a result, an insertion portion 102A1 consisting only of the flat portion 81 and the outer plate portion 82 is formed at one end of the first connecting portion 17A, with a length of L2a.

[0048] Furthermore, the first connection portion 17A has a second apex notch 101A2 cut out toward the apex at a portion (the other end) connected to the first connection portion 17C of the second end fold plate 13C to ensure an overlapping range with the second end fold plate 13C. The second apex notch 101A2 has a length L2b, which is longer than the length L1 of the second notch 101C. As a result, an insertion portion 102A2 consisting only of the flat portion 81 and the outer plate portion 82 is formed at the other end of the first connection portion 17A by a predetermined length L2b. In this embodiment, the length L2a of the first apex notch 101A1 and the length L2b of the second apex notch 101A2 are the same, but they may be different from each other.

[0049] The vertex folding plate 13A is first connected to the first end folding plate 13B, and then to the second end folding plate 13C.

[0050] When connected to the first end folding plate 13B, the eave-side end of the second connection portion 18A of the vertex folding plate 13A fits over and covers the ridge-side end of the second connection portion 18B of the first end folding plate 13B. Furthermore, the insertion portion 102A1 of the vertex folding plate 13A fits into the first connection portion 17B of the first end folding plate 13B, allowing one eave-side end of the vertex folding plate 13A to rest on and overlap the ridge-side end of the first end folding plate 13B. At this time, the insertion portion 102A2 of the vertex folding plate 13A rests on the first connection portion 17C of the second end folding plate 13C.

[0051] Next, when connected to the second end plate 13C, the eave-side end of the second connection portion 18A of the vertex folding plate 13A fits over and covers the ridge-side end of the second connection portion 18B of the second end plate 13C. Furthermore, the insertion portion 102A2 of the vertex folding plate 13A fits into the first connection portion 17B of the second end plate 13C, allowing the eave-side end of the vertex folding plate 13A to rest on and overlap the ridge-side end of the second end plate 13C. This operation is performed with the insertion portion 102A2 of the vertex folding plate 13A resting on the first connection portion 17C of the second end plate 13C, so the insertion portion 102A2 of the vertex folding plate 13A must be twisted significantly to fit into the first connection portion 17C of the second end plate 13C.

[0052] As described above, the length L2a of the apex first notch 101A1 is longer than the length L1a of the first notch 101B. Furthermore, the length L2b of the apex second notch 101A2 is longer than the length L1b of the second notch 101C. Specifically, when the lengths L1a and L1b are 200 mm, the lengths L2a and L2b are 250 mm or greater. The lengths L2a and L2b are preferably in the range of 250 to 400 mm. In other words, the length L2a of the apex first notch 101A1 is preferably 50 to 200 mm longer than the length L1a of the first notch 101B. The length L2b of the apex second notch 101A2 is preferably 50 to 200 mm longer than the length L1b of the second notch 101C. The length L2a of the apex first notch 101A1 is preferably in the range of 250 to 400 mm in the longitudinal direction. The length L2b of the second apex notch 101A2 is preferably in the range of 250 to 400 mm in the longitudinal direction.

[0053] In Figure 11, the length Z1 of the overlapping portion 23 between the vertex folding plate 13A and the first end folding plate 13B is shorter than the length L2a of the vertex first notch 101A1. Furthermore, the length Z2 of the overlapping portion 23 between the vertex folding plate 13A and the second end folding plate 13C is shorter than the length L2b of the vertex second notch 101A2. In other words, in this embodiment, the length of the notch in the vertex folding plate 13A is set longer than the length of the overlapping portion 23 of the vertex folding plate 13A. Furthermore, the length of the overlapping portion 23 between the vertex folding plate 13A and the first end folding plate 13B or the second end folding plate 13C is set longer than the length of the overlapping portion 23 between the first folding plates 13 and the overlapping portion 23 between the second folding plates 13.

[0054] The first end folding plate 13B or the second end folding plate 13C may deviate from the predetermined position toward the apex (one side in the lengthwise direction) if there is an error in the longitudinal joint construction, or if the folding plate 13 is longer than designed due to the accuracy of cutting the folding plate or the notch. However, as described above, the lengths of the apex first notch 101A1 and the apex second notch 101A2 of the apex folding plate 13A are set longer than the notches 101B and 101C of the first end folding plate 13B and the second end folding plate 13C, respectively, so that deviation can be absorbed and construction can be carried out without problems.

[0055] If there is an error in the longitudinal joint construction, or if the folded plate 13 is shorter than designed due to the accuracy of the folded plate cutting or the notch cutting, the first end folding plate 13B or the second end folding plate 13C may shift from the predetermined position to the opposite side of the apex side (one side in the length direction), as opposed to the case described above. However, in this embodiment, as described above, the length of the apex first notch 101A1 and the apex second notch 101A2 of the apex folding plate 13A is set longer than the notches 101B and 101C of the first end folding plate 13B and the second end folding plate 13C, respectively. Therefore, the length of the overlapping portion 23 between the apex folding plate 13A and the first end folding plate 13B or the second end folding plate 13C can be set long in advance. Therefore, even if the overlapping portion 23 is shortened for the above reason, the required length can be secured.

[0056] As a result of the above, it is possible to absorb length errors caused by connecting multiple folded plates that form the arch shape and ensure an appropriate amount of overlap, enabling high-precision construction.

[0057] By constructing as described above, the apex folded plate 13A, the first end folded plate 13B, and the second end folded plate 13C are connected to each other as shown in Figure 13 to form the apex portion of the arch-shaped lower roof 2. The apex folded plate 13A, the first end folded plate 13B, and the second end folded plate 13C are slightly curved in an arch shape. The center of the length of the apex folded plate 13A is supported by the purlin 51 and the tight frame 52.

[0058] (4) Upper roof As shown in Figure 2B, the upper roof 3 covers the entire lower roof 2 from above. Like the lower roof 2, the upper roof 3 is also provided in an arch shape. As shown in Figures 2A and 2B, a support 7 is attached to the top of the lower roof 2, and the upper roof 3 is attached to this support 7. The support 7 is attached to the upper end of the peak portion 11 of the lower roof 2. The support 7 is attached above each tight frame 52 in the eaves-ridge direction.

[0059] The support 7 is used to install the upper roof 3 above the lower roof 2 at a predetermined distance above the lower roof 2 when attaching the upper roof 3 above the lower roof 2. As shown in Figure 3, the support 7 is composed of an upper roof saddle 71 that is fixed by clamping the seam fixing part 21 of the lower roof 2, and an upper retaining part 72 that is supported by the saddle 71. The upper roof saddle 71 is made up of a pair of saddle halves 71A and 71B made of steel or the like that are joined together and connected by bolt members 73.

[0060] Each saddle half 71A, 71B has a leg 76 consisting of a bottom plate portion 74 and an upright plate portion 75. The bottom plate portion 74 is disposed on the upper surface of the flat portion 81 of one of a pair of folded plates 13 that make up one peak portion 11 and the flat portion 91 of the other folded plate 13. The saddle 71 for the upper roof is fixed to the lower roof 2 by tapping screws 77 that are driven from the side of the leg 76. Note that bolts may be used instead of tapping screws.

[0061] As shown in Figure 2B, the upper roof 3 has multiple peaks 41 and multiple valleys 42, similar to the lower roof 2. The peaks 41 and valleys 42 are arranged alternately in the horizontal direction on the upper roof 3. Each peak 41 and each valley 42 extends long in the eaves-ridge direction.

[0062] The multiple peaks 41 and the multiple valleys 42 are made up of multiple folded plates 44. Each folded plate 44 is a vertically-roofed metal roofing material. The length of each folded plate 44 is approximately the entire length of the lower roof 2 in the eaves-ridge direction. Each folded plate 44 has a substantially U-shaped cross section. The multiple folded plates 44 are connected to each other in the horizontal and eaves-ridge directions. The top of the upper retaining clip portion 72 is sandwiched between the folded plates 44 and seamed. A detailed description of the connection between the multiple folded plates 44 in the horizontal and eaves-ridge directions will be omitted. The folded plate 44 may have a vertically-jointed structure or may be a single piece (i.e., a structure without vertical joints).

[0063] 2. Variations The above-described embodiment is merely one of various embodiments of the present disclosure, and various modifications can be made to the above-described embodiment as long as the object of the present disclosure is achieved.

[0064] (1) Modifications of the basic roof structure The folded plate roof structure 30 of the present disclosure is not limited to one that constitutes the double folded plate roof structure 1. In other words, the folded plate roof structure 30 of the present disclosure may constitute a single-layer folded plate roof structure consisting of only the lower roof 2 of the above embodiment.

[0065] The double folded-plate roof structure 1 of the present disclosure may be a roof structure for a newly constructed building or a roof renovation structure.

[0066] (2) Modification of the connection part of the folded plate The shape of the connecting portions 16 of the folding plates 13 and the connecting structure between the connecting portions 16 are not limited to the shape and connecting structure shown in FIG. 3 and the like.

[0067] The shape, position and number of the notches in the folding plate 13 can be changed as appropriate as long as it allows or facilitates the overlapping of two folding plates 13 at the longitudinal joint.

[0068] 3. Summary As described above, the folded plate roof structure (30) according to the first embodiment is a folded plate roof structure (30) that forms an arch shape. The folded plate roof structure (30) includes a plurality of first folded plates (13) that are arranged from one end of the arch shape toward the apex and are connected to each other, a plurality of second folded plates (13) that are arranged from the other end of the arch shape toward the apex and are connected to each other, and an apex folded plate (13A). The apex folded plate (13A) is connected to an end first folded plate (13B) located at the end of the apex side of the plurality of first folded plates (13) and an end second folded plate (13C) located at the end of the apex side of the plurality of second folded plates (13).

[0069] Each of the first end folding plate (13B), the second end folding plate (13C), and the apex folding plate (13A) has a first connecting portion (17B, 17C, 17A) located at one end in the width direction perpendicular to the length direction along the arch shape, and a second connecting portion (18B, 18C, 18A) located at the other end in the width direction.

[0070] The first connecting portion (17B) of the end first folding plate (13B) has a first notch (101B) cut out toward the apex at a portion connected to the first connecting portion (17B) of another first folding plate (13) in order to ensure an overlapping range between the first folding plates (13).

[0071] The first connecting portion (17C) of the end second folding plate (13C) has a second notch (101C) cut out toward the apex at a portion connected to the first connecting portion (17C) of another second folding plate (13) in order to ensure an overlapping range between the second folding plates (13).

[0072] The first connection portion (17A) of the vertex folding plate (13A) has, at a portion connected to the first connection portion (17B) of the end first folding plate (13B), a vertex first notch (101A1) cut out toward the vertex side to ensure an overlapping range with the end first folding plate (13B), and has, at a portion connected to the first connection portion (17C) of the end second folding plate (13C), a vertex second notch (101A2) cut out toward the vertex side to ensure an overlapping range with the end second folding plate (13C).

[0073] The apex first notch (101A1) is longer in the length direction than the first notch (101B).

[0074] The apex second notch (101A2) is longer in the length direction than the second notch (101C).

[0075] In the basic configuration of this embodiment, for example, if multiple first folding plates 13 are shorter than designed, the end first folding plate 13A may be shifted from its predetermined position toward the opposite side from the apex by the total of the shortfalls, thereby shortening the length of the overlapping portion 23 between the apex folding plate 13A and the end first folding plate 13B. Therefore, unlike this embodiment, if the length of the notch in the apex folding plate is the same as the length of the notches in the other folding plates, the overlapping portion between the apex folding plate and the end first folding plate or the end second folding plate will be insufficient. However, in this embodiment, the first apex notch 101A1 is longer in the longitudinal direction than the first notch 101B, thereby setting the length of the overlapping portion 23 longer. Therefore, even if the first folding plates 13 are shorter than designed, the overlapping portion 23 between the apex folding plate 13A and the first folding plate 13B can be sufficiently long. Furthermore, the apex second notch (101A2) of the apex folding plate (13A) is longer in the longitudinal direction than the second notch (101C), and the length of the overlapping portion (23) is also set to be long. Therefore, even if the plurality of second folding plates (13) is shorter than designed, the length of the apex folding plate (13A) and the overlapping portion (23) of the second folding plates (13) can be sufficiently secured.

[0076] In the basic configuration of this embodiment, for example, if multiple first folding plates (13) are longer than designed, the end first folding plate (13B) may shift toward the apex from its predetermined position by the sum of the excess. However, as described above, the first apex notch (101A1) is longer in the longitudinal direction than the first notch (101B), thereby ensuring an excess in the first apex notch (101A1). Therefore, even if the first folding plate (13) is longer than designed, the shift can be absorbed and installation can be carried out without problems. Furthermore, the second apex notch (101A2) of the apex folding plate (13A) is set longer in the longitudinal direction than the second notch (101C). Therefore, even if the second folding plate (13) is longer than designed, the shift can be absorbed and installation can be carried out without problems.

[0077] As a result of the above, it is possible to absorb length errors caused by connecting multiple folded plates that form the arch shape and ensure an appropriate amount of overlap, enabling high-precision construction.

[0078] In the folded plate roof structure (30) according to the second aspect, in the first aspect, the apex first notch (101A1) is longer than the first notch (101B) in the longitudinal direction by 50 mm or more, and the apex second notch (101A2) is longer than the second notch (101C) in the longitudinal direction by 50 mm or more.

[0079] In this embodiment, it is easy to ensure a sufficient length of the overlapping portion 23 between the vertex folding plate 13A and the first end folding plate 13B, and a sufficient length of the overlapping portion 23 between the vertex folding plate 13A and the second end folding plate 13C.

[0080] In the folded plate roof structure (30) according to the third aspect, in the first or second aspect, the apex first notch (101A1) is 250 mm or more in the length direction, and the apex second notch (101A2) is 250 mm or more in the length direction.

[0081] In this embodiment, it is easy to ensure a sufficient length of the overlapping portion (23) between the vertex folding plate (13A) and the first end folding plate (13B) and a sufficient length of the overlapping portion (23) between the vertex folding plate (13A) and the second end folding plate (13C). [Explanation of symbols]

[0082] 30: Folded plate roof structure 13: Folded plate 13A: Vertex folded plate 13B: First end plate 13C: End second fold plate 17A, 17B, 17C: First connection 18A, 18B, 18C: Second connection part 101A1: First vertex missing 101A2: Apex second notch 101B: No.1 missing 101C: Second notch

Claims

1. A folded plate roof structure that forms an arch shape, A plurality of first folding plates arranged from one end of the arch shape toward an apex and connected to each other; A plurality of second folded plates arranged from the other end of the arch shape toward the apex and connected to each other; An end first folded plate located at an end on the apex side of the plurality of first folded plates and an end second folded plate located at an end on the apex side of the plurality of second folded plates are provided, Each of the first end fold plate, the second end fold plate, and the vertex fold plate is a first connection portion located at one end in a width direction perpendicular to a length direction along the arch shape, and a second connection portion located at the other end in the width direction, The first connection portion of the end first folding plate has a first notch cut out toward the apex side in a portion connected to the first connection portion of another first folding plate adjacent to the one end side to ensure an overlapping range between the first folding plates, The first connection portion of the end second fold plate has a second notch cut out toward the apex side in a portion connected to the first connection portion of another second fold plate adjacent to the other end side to ensure an overlapping range between the second fold plates, The first connection portion of the vertex folded plate has a vertex first notch cut out toward the vertex side at a portion connected to the first connection portion of the end first folded plate to ensure an overlapping range with the end first folded plate, and a vertex second notch cut out toward the vertex side at a portion connected to the first connection portion of the end second folded plate to ensure an overlapping range with the end second folded plate, the first notch at the apex is longer in the length direction than the first notch, The apex second notch is longer than the second notch in the length direction. Folded plate roof structure.

2. The first notch at the apex is 50 mm or more longer than the first notch in the length direction, The folded plate roof structure according to claim 1, wherein the apex second notch is 50 mm or more longer than the second notch in the length direction.

3. The first notch at the apex is 250 mm or more in the length direction, The folded plate roof structure according to claim 1 or 2, wherein the apex second notch is 250 mm or more in the length direction.

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