Roof structure and roofing materials

Abstract

To provide a roof structure and a roof material having excellent waterproofness.SOLUTION: A roof structure 1 comprises a downstream roof material 2A, and an upstream roof material 2B disposed upstream of the downstream roof material 2A. The downstream roof material 2A includes a downstream roof material main body 20, and a rising part 24 extending toward a front side from an upstream end of the downstream roof material main body 20. The upstream roof material 2B includes an upstream roof material main body 20, and a trailing part 22 extending toward a rear side from a downstream end of the upstream roof material main body 20. The trailing part 22 positions downstream of the rising part 24. The rising part 24 includes a projecting part 240 which is further projecting toward the downstream side than another part 244 in the rising part 24. A gap 14 is formed between the other part 244 and the trailing part 22.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to roof structures and roofing materials. [Background technology]

[0002] Patent Document 1 discloses a corrugated roofing sheet material in which peaks and valleys are alternately arranged in the width direction. This roofing sheet material is joined to other roofing sheets by overlapping the underwater end of the roofing sheet material with the abovewater end of another roofing sheet material that has already been installed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-39248 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned roofing sheet material, there is a possibility that rainwater passes between two adjacent roofing sheets in the flow direction, and thus the waterproofing is not high.

[0005] The present disclosure has been made in consideration of the above-mentioned reasons, and aims to provide a roof structure and roofing material having excellent waterproof properties. [Means for solving the problem]

[0006] A roof structure according to one aspect of the present disclosure comprises an underwater roofing material and an abovewater roofing material arranged on the abovewater side of the underwater roofing material. The underwater roofing material has an underwater roofing material main body and a rising portion extending from the abovewater end of the underwater roofing material main body toward the front side. The abovewater roofing material has an abovewater roofing material main body and a rising portion extending from the underwater end of the abovewater roofing material main body toward the back side. The rising portion is located on the underwater side of the rising portion. The rising portion has a protruding portion that protrudes further toward the underwater side than other portions of the rising portion and has a shorter distance to the rising portion than the other portions. A gap is formed between the other portions and the rising portion.

[0007] A roofing material according to one aspect of the present disclosure includes a main body, a rising portion extending from an underwater end of the main body toward a back surface side, and a rising portion extending from an abovewater end of the main body toward a front surface side. The rising portion has a protruding portion that protrudes toward the underwater side further than other portions of the rising portion, and when a rising portion of another roofing material above the water and having the same shape as the rising portion is located below the water side of the rising portion, the protruding portion has a shorter distance to the rising portion of the other roofing material than the other portions. Effect of the Invention

[0008] The roof structure and roof material of the above aspect can improve the waterproofing of a building. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing a roof structure according to one embodiment. [Diagram 2] FIG. 2 is a perspective view showing two roof materials arranged in the flow direction in the roof structure of the above. [Diagram 3] 3 is a cross-sectional view taken along line X3-X3 of FIG. 2. FIG. [Figure 4] 4 is a cross-sectional view taken along line X4-X4 of FIG. [Diagram 5] FIG. 5 is a perspective view showing the first below-water side roofing material, the first above-water side roofing material, and the second below-water side roofing material provided in the roof structure. [Figure 6] FIG. 6 is a cross-sectional view corresponding to FIG. 4 of another example of a roof structure. [Figure 7] FIG. 7 is a cross-sectional view corresponding to FIG. 4, showing a roof structure according to still another embodiment. [Figure 8] FIG. 8 is a cross-sectional view corresponding to FIG. 4, showing a roof structure according to still another embodiment. [Figure 9] FIG. 9 is a perspective view of yet another example of a roofing material. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (1) Implementation form The present disclosure relates to roof structures and roofing materials, and more particularly to a roof structure having adjacent roofing materials in a flow direction and a roofing material used in the roof structure.

[0011] Fig. 1 shows a roof structure 1 of this embodiment. The building to which the roof structure 1 of this embodiment is applied may be any of a residential building, a non-residential building, and a complex building. A residential building is, for example, a detached house or an apartment building. A non-residential building is, for example, a store, a warehouse, a factory, or a meeting hall. A complex building is a building having a part used for residential purposes and a part used for non-residential purposes.

[0012] The roof structure 1 includes a roof underlayment 10 and a plurality of roof materials 2. The roof underlayment 10 is a base for the plurality of roof materials 2. The roof underlayment 10 includes, for example, a sheathing board 11 and an underlayment 12 laid on the upper surface of the sheathing board 11. In this case, the upper surface of the underlayment 12 is the upper surface of the roof underlayment 10. The roof underlayment 10 does not need to include the underlayment 12. The roof underlayment 10 is not limited to having the sheathing board 11, and may be composed of, for example, a plurality of cross members. When the roof material 2 is used for remodeling, the roof underlayment 10 may be composed of an existing roof material.

[0013] A plurality of roofing materials 2 are laid on the roof underlay 10 in a state of being lined up in the flow direction and the horizontal direction. In this disclosure, the "flow direction" refers to the direction in which rainwater flows on the roof surface formed by the roof structure 1, which is parallel to the slope direction of the roof surface and toward the water downstream side. Here, the "roof surface" refers to one of the upper surfaces of the roof formed by the roof structure 1, which has a certain slope. For example, when the roof structure 1 forms a gable roof, the roof structure 1 has only one roof surface. For example, when the roof structure 1 forms a gable roof, the roof structure 1 has two roof surfaces. The roof structure 1 may have three or more roof surfaces. In this disclosure, the "horizontal direction" refers to the horizontal direction perpendicular to the flow direction.

[0014] Each roofing material 2 is formed by bending a single metal plate, for example, by pressing. The metal plate constituting each roofing material 2 is, for example, a painted steel plate, a galvanized steel plate, a stainless steel plate, a Galvalume steel plate (registered trademark), an SGL (registered trademark) steel plate, etc.

[0015] Each roofing material 2 has approximately the same shape and size. Each roofing material 2 is a component that is molded so that the dimension in the flow direction is longer than the dimension in the horizontal direction, and has a longitudinal direction. Hereinafter, the direction along the flow direction of the roofing material 2 will be referred to as the "longitudinal direction."

[0016] Each roofing material 2 has a longitudinal dimension of, for example, 2 m or more and 4 m or less, and is installed in a state where a plurality of roofing materials 2 are lined up in the longitudinal direction on one roof surface. Note that the longitudinal dimension of each roofing material 2 is not limited.

[0017] For two roofing materials 2 adjacent in the flow direction, the underwater end of the roofing material 2 located above the water overlaps the abovewater end of the roofing material 2 located below the water. For two roofing materials 2 adjacent in the horizontal direction, the end of one roofing material 2 on the side of the other roofing material 2 overlaps the end of the other roofing material 2 on the side of the one roofing material 2.

[0018] As shown in Figure 2, each roofing material 2 has a belowwater step 26 formed at the underwater end and an abovewater step 27 formed at the abovewater end. The roofing material 2 has a main body 20, a rising portion 22, a step lower portion 23, a rising portion 24, and a step upper portion 25. The main body 20, the rising portion 22, the step lower portion 23, the rising portion 24, and the step upper portion 25 are formed integrally.

[0019] The main body 20 constitutes the portion between the underwater end and the abovewater end of the roofing material 2. Both lateral ends of the main body 20 are the lateral ends of the roofing material 2. The rising portion 22 extends from the underwater end of the main body 20 toward the back surface side. Note that in this disclosure, the "back surface side" means the roof underlay 10 side, and includes not only the direction perpendicular to the back surface, but also a direction not perpendicular to the back surface.

[0020] The rising portion 22 is formed over the entire length of the underwater end of the main body 20. The step lower portion 23 extends from the lower end of the rising portion 22 toward the underwater side. The step lower portion 23 is formed over the entire length of the lower end of the rising portion 22. The step lower portion 23 constitutes the underwater end of the roof material 2.

[0021] The rising portion 24 extends from the above-water end of the main body 20 toward the surface side. Note that the "surface side" in this disclosure means the side opposite to the roof underlayment 10, and includes not only a direction perpendicular to the surface, but also a direction not perpendicular to the surface.

[0022] The rising portion 24 is formed over the entire length of the above-water end of the main body 20. The step portion 25 extends from the upper end of the rising portion 24 toward the above-water side. The step portion 25 is formed over the entire length of the upper end of the rising portion 24. The step portion 25 constitutes the above-water end of the roof material 2.

[0023] The underwater step 26 is made up of the underwater end of the main body 20, the rising portion 22, and the lower step portion 23. The abovewater step 27 is made up of the abovewater end of the main body 20, the rising portion 24, and the upper step portion 25. The underwater end of the lower step portion 23 is the underwater end of the roof material 2. The abovewater end of the upper step portion 25 is the abovewater end of the roof material 2.

[0024] The cross-sectional shape perpendicular to the longitudinal direction of each of the main body 20, the lower step portion 23, and the upper step portion 25 is substantially the same over the entire longitudinal length. However, the cross-sectional shape of the portion of the main body 20 in the longitudinal direction where the notches 30 and 40 described below are formed is different from that of the other portions.

[0025] Each roof material 2 is placed on the roof underlay 10, for example, with the corner on the below-water side formed by the rising portion 22 and the step portion 23 and the corner on the above-water side formed by the rising portion 24 and the step portion 25 in contact with the below-water side roof material 2 and roof underlay 10, respectively, or with the corner on the roof underlay 10.

[0026] When another roofing material 2 is installed on the underwater side of the roofing material 2, the step lower part 23 and the underwater end of the main body 20 overlap the main body 20 and step upper part 25 of the other roofing material 2, respectively. In addition, the standing part 22 is located on the underwater side of the standing part 24 of the other roofing material 2 and faces the standing part 24 of the other roofing material 2.

[0027] The rising portion 24 prevents the rising portion 22 of another roofing material 2 adjacent to the above-water side from moving toward the above-water side. A worker installing the roofing material 2 can align the roofing material 2 by placing the rising portion 22 on the below-water side of the rising portion 24 of the roofing material 2 installed on the below-water side. The rising portion 24 also blocks rainwater that flows back toward the above-water side along the surface of the main body 20. This improves the waterproofing of the building.

[0028] Each roof material 2 has an intermediate portion 28 that constitutes the horizontal intermediate portion. The intermediate portion 28 has a main body intermediate portion 200 that constitutes the horizontal intermediate portion of the main body 20, a lower step intermediate portion 230 that constitutes the horizontal intermediate portion of the lower step portion 23, and an upper step intermediate portion 250 that constitutes the horizontal intermediate portion of the upper step portion 25.

[0029] The main body intermediate section 200, the step lower intermediate section 230, and the step upper intermediate section 250 each have the same shape and size in a cross section perpendicular to the longitudinal direction. For this reason, the main body intermediate section 200 will be described in detail below, and for the step lower intermediate section 230 and the step upper intermediate section 250, elements common to the main body intermediate section 200 will be given the same reference numerals, and duplicated explanations will be omitted.

[0030] The main body intermediate portion 200 has a pair of flat plate portions 201, 202 spaced apart in the laterally direction, and a protruding portion 203 located between the pair of flat plate portions 201, 202. Each of the pair of flat plate portions 201, 202 is formed in a flat plate shape that follows the upper surface of the roof foundation 10.

[0031] The protruding portion 203 of the intermediate body portion 200 is formed over the entire length of the intermediate body portion 200 in the longitudinal direction. The protruding portion 203 protrudes toward the front surface further than the other portions of the intermediate body portion 200 (the pair of flat plate portions 201, 202). The cross-sectional shape of the protruding portion 203 perpendicular to the longitudinal direction is a mountain shape curved so as to protrude toward the front surface. The pair of flat plate portions 201, 202 of the intermediate body portion 200 extend laterally outward from the lower ends of the protruding portion 203.

[0032] The protruding portions 203 of the lower step portion 23 and the upper step portion 25 are formed at the same position in the horizontal direction as the protruding portion 203 of the intermediate body portion 200. The protruding portion 203 of the lower step portion 23 is located below the water surface of the protruding portion 203 of the intermediate body portion 200, and the protruding portion 203 of the upper step portion 25 is located above the water surface of the protruding portion 203 of the intermediate body portion 200.

[0033] The middle part 28 of the roofing material 2 has an intermediate fitting part 280 constituted by the protruding part 203 of the main body middle part 200, the protruding part 203 of the step lower part 23 and the protruding part 203 of the step upper part 25. The intermediate fitting part 280 extends over the entire length of the roofing material 2 in the longitudinal direction.

[0034] As shown in Fig. 2, each roofing material 2 has a pair of fitting portions 3, 4 formed at both lateral ends. Hereinafter, of the pair of fitting portions 3, 4, the fitting portion 3 formed at one lateral end of the roofing material 2 is referred to as the one-side fitting portion 3, and the fitting portion 4 formed at the other lateral end of the roofing material 2 (the end opposite to the one-side fitting portion 3) is referred to as the other-side fitting portion 4. In addition, in this disclosure, as shown in Figs. 1 and 2, the direction parallel to the lateral direction and from the other-side fitting portion 4 to the one-side fitting portion 3 is referred to as the one-side, and the direction parallel to the lateral direction and from the one-side fitting portion 3 to the other-side fitting portion 4 is referred to as the other.

[0035] The pair of fitting portions 3, 4 (one fitting portion 3 and the other fitting portion 4) have a pair of main body fitting portions 204, a pair of belowwater fitting portions 231, and a pair of abovewater fitting portions 251. The pair of main body fitting portions 204 are formed at both lateral end portions of the main body 20, respectively, and protrude toward the front surface side. Each of the pair of main body fitting portions 204 is formed over the entire length of the main body 20 in the longitudinal direction.

[0036] The pair of underwater fitting parts 231 are formed on both lateral ends of the lower step part 23 and protrude toward the surface side. Each of the pair of underwater fitting parts 231 is formed over the entire length of the lower step part 23 in the longitudinal direction.

[0037] The pair of above-water side fitting parts 251 are formed on both lateral ends of the step upper part 25, and protrude toward the surface side. Each of the pair of above-water side fitting parts 251 is formed over the entire length of the step upper part 25 in the longitudinal direction.

[0038] Hereinafter, the main body fitting portion 204 formed at one end of the main body 20 will be referred to as the one main body fitting portion 205, and the main body fitting portion 204 formed at the other end of the main body 20 will be referred to as the other main body fitting portion 206. Also, the underwater side fitting portion 231 formed at one end of the lower step portion 23 will be referred to as the one underwater side fitting portion 231A, and the underwater side fitting portion 231 formed at the other end of the lower step portion 23 will be referred to as the other underwater side fitting portion 231B. Also, the abovewater side fitting portion 251 formed at one end of the upper step portion 25 will be referred to as the one abovewater side fitting portion 251A, and the abovewater side fitting portion 251 formed at the other end of the upper step portion 25 will be referred to as the other abovewater side fitting portion 251B.

[0039] The one-side underwater fitting portion 231A is located on the underwater side of the one-side main body fitting portion 205, and the one-side abovewater fitting portion 251A is located on the abovewater side of the one-side main body fitting portion 205. The one-side main body fitting portion 205, the one-side underwater fitting portion 231A, and the one-side abovewater fitting portion 251A constituting the one-side fitting portion 3 have the same shape and size of a cross section perpendicular to the longitudinal direction. For this reason, the one-side main body fitting portion 205 will be described in detail below, and for the one-side underwater fitting portion 231A and the one-side abovewater fitting portion 251A, elements common to the one-side main body fitting portion 205 will be given the same reference numerals, and duplicated explanations will be omitted.

[0040] The cross-sectional shape of the first body fitting portion 205 perpendicular to the longitudinal direction is a mountain shape that is curved so as to protrude toward the front surface side. As shown in Fig. 3, the first body fitting portion 205 has a ceiling portion 207 and a pair of side wall portions 208, 209. The ceiling portion 207 is formed in a flat plate shape that is approximately parallel to the flat plate portions 201, 202 of the main body 20. The upper surface of the ceiling portion 207 is the upper surface of the first body fitting portion 205.

[0041] The pair of side walls 208, 209 extend from both lateral ends of the ceiling portion 207 toward the rear surface side. Each of the pair of side walls 208, 209 is inclined with respect to the vertical direction so that the portion closer to the bottom end is positioned more outward in the lateral direction of the one main body fitting portion 205. Hereinafter, of the pair of side walls 208, 209, the side wall 208 located on one side will be referred to as the one side wall 208, and the side wall 209 located on the other side will be referred to as the other side wall 209.

[0042] A lower edge 213 of the one side wall portion 208 extends laterally outward and is approximately parallel to the flat plate portion 201 of the main body 20. The outer end of the lower edge portion 213 is a free end. A lower end portion of the other side wall portion 209 is connected to the flat plate portion 201 of the main body 20. The inclination angle of the other side wall portion 209 with respect to the flat plate portion 201 is larger than that of the one side wall portion 208.

[0043] 2, the other underwater side fitting portion 231B is located on the underwater side of the other main body fitting portion 206, and the other abovewater side fitting portion 251B is located on the abovewater side of the other main body fitting portion 206. The other main body fitting portion 206, the other belowwater side fitting portion 231B, and the other abovewater side fitting portion 251B have the same shape and size in cross section perpendicular to the longitudinal direction. For this reason, the other main body fitting portion 206 will be described in detail below, and for the other belowwater side fitting portion 231B and the other abovewater side fitting portion 251B, elements common to the other main body fitting portion 206 will be given the same reference numerals, and duplicated explanations will be omitted.

[0044] 3, the cross-sectional shape of the other-main-body fitting portion 206 perpendicular to the longitudinal direction is a mountain shape that is curved so as to protrude toward the front surface. The other-main-body fitting portion 206 has a ceiling portion 210 and a pair of side wall portions 211, 212. The ceiling portion 210 is formed in a flat plate shape that is approximately parallel to the flat plate portions 201, 202 of the main body 20. The upper surface of the ceiling portion 210 is the upper surface of the other-main-body fitting portion 206.

[0045] The pair of side wall portions 211, 212 extend from both lateral ends of the ceiling portion 210 toward the rear surface side. Each of the pair of side wall portions 211, 212 is inclined with respect to the vertical direction so that the portion closer to the bottom end is positioned more outside in the lateral direction of the other main body fitting portion 206. Hereinafter, of the pair of side wall portions 211, 212, the side wall portion 211 located on one side will be referred to as the one side wall portion 211, and the side wall portion 212 located on the other side will be referred to as the other side wall portion 212.

[0046] A lower end of the one side wall portion 211 is connected to the flat plate portion 202 of the main body 20. The inclination angle of the other side wall portion 212 relative to the flat plate portion 202 is smaller than the inclination angle of the one main body fitting portion 205 relative to the flat plate portion 201. The lower end of the other side wall portion 212 is a free end. However, after extending toward the outside in the horizontal direction, the lower end of the other side wall portion 212 is folded back toward the inside in the horizontal direction on the back side.

[0047] When another roofing material 2 is installed on the underwater side of the roofing material 2, the protruding portion 203 of the step lower portion 23 and the underwater end of the protruding portion 203 of the main body intermediate portion 200 shown in Fig. 2 are fitted in a state of covering the abovewater end of the protruding portion 203 of the main body intermediate portion 200 of the other roofing material 2 and the protruding portion 203 of the step upper portion 25, respectively. In addition, the one underwater fitting portion 231A and the underwater end of the one main body fitting portion 205 are fitted in a state of covering the abovewater end of the one main body fitting portion 205 of the other roofing material 2 and the one abovewater fitting portion 251A, respectively. This restricts the lateral movement of the roofing material 2 relative to the other roofing material 2.

[0048] When another roof material 2 is installed on the other side of the roof material 2, as shown in Fig. 4, the other fitting portion 4 fits over the one fitting portion 3 of the other roof material 2, covering and concealing the surface of the one fitting portion 3 of the other roof material 2. In this case, the other fitting portion 4 fits over the one main body fitting portion 205, one below water side fitting portion 231A and one above water side fitting portion 251A of the other roof material 2, respectively, with the other main body fitting portion 206, the other below water side fitting portion 231B and the other above water side fitting portion 251B (see Fig. 2).

[0049] The one fitting portion 3 and the other fitting portion 4 are fixed portions that are fixed to the roof underlayment 10. As shown in Fig. 4, laterally adjacent roofing materials 2 are fixed to the roof underlayment 10 by fasteners 13 that vertically penetrate the one fitting portion 3 and the other fitting portion 4 of one roofing material 2 that fits into the one fitting portion 3 of the other roofing material 2. The fasteners 13 are, for example, nails or screws.

[0050] It is preferable that the portions of the first fitting portion 3 and the other fitting portion 4 through which the fastener 13 passes are sealed to prevent rainwater from entering. All of the portions of the first fitting portion 3 and the other fitting portion 4 corresponding to the main body 20, the step lower portion 23, and the step upper portion 25 may be fixed to the roof underlayment 10 by the fastener 13 at one or more locations. Only the portions of the first fitting portion 3 and the other fitting portion 4 corresponding to one or two selected from the main body 20, the step lower portion 23, and the step upper portion 25 may be fixed to the roof underlayment 10 by the fastener 13 at one or more locations. In addition, a fastener hole for passing the fastener 13 may or may not be formed in advance in the first fitting portion 3 and the other fitting portion 4 before the fastener 13 is passed through.

[0051] When another roofing material 2 is installed on the other side of the roofing material 2, a gap 15 larger than the gap formed between the one side wall portion 211 of the other fitting portion 4 and the one side wall portion 208 of the other roofing material 2 is formed between the other side wall portion 212 of the other fitting portion 4 and the other side wall portion 208 of the other roofing material 2 is formed. This gap 15 suppresses rainwater that has reached between the other side wall portion 212 and the other side wall portion 209 of the other roofing material 2 from rising due to capillary action. For this reason, rainwater that has reached between the other side wall portion 212 and the other side wall portion 209 of the other roofing material 2 is suppressed from reaching the ceiling portion 207 of the one fitting portion 3 of the other roofing material 2 through which the fastener 13 has penetrated, or from climbing over the one fitting portion 3 of the other roofing material 2, thereby improving the waterproofing of the building. In addition, the folded-back portion at the lower end of the other side wall portion 212 of the other fitting portion 4 contacts the upper surfaces of the flat portion 201, lower step middle portion 230 and upper step middle portion 250 (see Figure 2) of the other roof material 2, preventing rainwater from flowing along this upper surface toward the one fitting portion 3 of the other roof material 2.

[0052] As shown in FIG. 2, the rising portion 24 of each roofing material 2 has a plurality of protrusions 240. The rising portion 24 has a pair of protrusions 240 spaced apart in the horizontal direction as the plurality of protrusions 240. The pair of protrusions 240 is formed in a portion of the rising portion 24 located between the one fitting portion 3 and the intermediate fitting portion 280, and in a portion of the rising portion 24 located between the other fitting portion 4 and the intermediate fitting portion 280. Each protrusion 240 is formed over the entire length of the rising portion 24 in the vertical direction. The lower end of each protrusion 240 is connected to the corresponding flat plate portion 201, 202 of the main body 20.

[0053] Each protrusion 240 is bent so as to protrude toward the underwater side, and is formed, for example, by bending a part of the metal plate constituting the rising portion 24. Each protrusion 240 has a tip wall 241 and a pair of side walls 242, 243. The tip wall 241 constitutes the tip (the end on the underwater side) of the protrusion 240. The tip wall 241 is formed in a flat plate shape that is approximately perpendicular to the longitudinal direction and parallel to the parts of the rising portion 24 other than the pair of protrusions 240. The tip wall 241 extends from the corresponding flat plate parts 201, 202 of the main body 20 toward the surface side.

[0054] The pair of side walls 242, 243 extend toward the above-water side from both lateral end portions of the tip wall portion 241. Each side wall portion 242, 243 is formed in a flat plate shape inclined with respect to the longitudinal direction so that the portion closer to the above-water side is positioned more outward in the lateral direction of the protruding portion 240. The above-water end portion of each side wall portion 242, 243 is connected to a portion of the rising portion 24 other than the pair of protruding portions 240.

[0055] When another roofing material 2 is installed on the water side of the roofing material 2, the tip wall 241 of each protrusion 240 is in contact with the above-water surface of the rising part 22 of the other roofing material 2, or is disposed in the vicinity of this surface. In this case, the distance from the tip wall 241 of each protrusion 240 to the rising part 22 of the other roofing material 2 is shorter than the distance from the other part 244, which is the part of the rising part 24 other than the pair of protrusions 240, to the rising part 22 of the other roofing material 2. Therefore, a gap 14 (see FIG. 1) is formed between the other part 244 and the rising part 22 of the other roofing material 2 adjacent to the above-water side. That is, when the roofing material 2 located on the below-water side of two roofing materials 2 adjacent to each other in the flow direction is the below-water side roofing material 2A and the roofing material 2 located on the above-water side is the above-water side roofing material 2B, a gap 14 is formed between the other part 244 of the rising part 24 of the below-water side roofing material 2A and the rising part 22 of the above-water side roofing material 2B. In this embodiment, gaps 14 are formed on both sides in the lateral direction of each protrusion 240. These gaps 14 prevent rainwater that reaches between the rising portion 24 and the rising portion 22 of another roofing material 2 adjacent to it on the above-water side from rising due to capillary action. This prevents rainwater on the below-water side of the rising portion 24 from rising above the step portion 25, improving the waterproofing of the building.

[0056] The shape of each protrusion 240 is not limited. For example, each side wall 242, 243 of the protrusion 240 may be formed in a flat plate shape parallel to the longitudinal direction. The protrusion 240 may be formed in a curved arc shape so as to protrude downward. Each protrusion 240 may be formed only on a portion of the rising portion 24 in the up-down direction. For example, the protrusion 240 may be formed only on the lower end, only on the upper end, or only on the middle portion in the up-down direction of the rising portion 24.

[0057] Furthermore, the number of protruding portions 240 that the rising portion 24 has is not limited, and the rising portion 24 may have only one protruding portion 240, or may have three or more protruding portions 240.

[0058] The roof structure 1 of this embodiment is provided with two types of roofing materials 2, a first roofing material 2a and a second roofing material 2b. The roofing material 2 located on the belowwater side in Fig. 2 is the first roofing material 2a, and the roofing material 2 located on the abovewater side in Fig. 2 is the second roofing material 2b.

[0059] The first roofing material 2a is the roofing material 2 located furthest below water among the multiple roofing materials 2, and constitutes the end of the roof surface on the eaves side. The second roofing material 2b is the roofing material 2 on which another roofing material 2 is installed on the below water side, and constitutes the part of the roof surface other than the end on the eaves side. In other words, the second roofing material 2b is installed on the above water side of the first roofing material 2a or the above water side of the other second roofing material 2b.

[0060] A notch 40 is formed in the other half of the above-water end of the other fitting part 4 of the first roof material 2a. The above-water end of the other fitting part 4 of the first roof material 2a is composed of only one half adjacent to the notch 40 in the horizontal direction. The notch 40 continues from the above-water end of the other main body fitting part 206 to the above-water end of the other above-water fitting part 251B. Hereinafter, the notch 40 will be referred to as the above-water notch 40.

[0061] The second roofing material 2b differs from the first roofing material 2a only in that a notch 30 is formed at the underwater end of one fitting portion 3. The notch 30 is formed in one half of the underwater end of one fitting portion 3 of the second roofing material 2b. In other words, the underwater end of one fitting portion 3 of the second roofing material 2b is composed only of the other half adjacent to the notch 30 in the horizontal direction. The notch 30 continues from the underwater end of one main body fitting portion 205 to the underwater end of one underwater fitting portion 231A. Hereinafter, the notch 30 will be referred to as the underwater notch 30.

[0062] In this embodiment, the second roofing material 2b has an above-water side cutout 40 formed therein, similar to the first roofing material 2a. However, for example, in cases where the second roofing material 2b is the roofing material 2 that is located furthest above the water on the roof surface, the second roofing material 2b does not need to have an above-water side cutout 40 formed therein.

[0063] Multiple roofing materials 2 lined up in the flow direction are installed in order starting from the roofing material 2 located below the water. In other words, for adjacent roofing materials 2 in the flow direction, the roofing material 2 below the water is installed first, and then the roofing material 2 above the water. Multiple roofing materials 2 lined up in the horizontal direction are installed in order starting from the roofing material 2 located on the other side (the opposite side from the one-side fitting portion 3). In other words, for adjacent roofing materials 2 in the horizontal direction, one roofing material 2 is installed after the other roofing material 2.

[0064] Next, an example of a method for installing a plurality of roofing materials 2 will be described. In the following, as shown in FIG. 1, a case will be described in which only one second roofing material 2b is installed on the above-water side of the first roofing material 2a, but two or more second roofing materials 2b arranged in the flow direction may be installed on the above-water side of the first roofing material 2a. In the following description, as shown in FIG. 1, the plurality of first roofing materials 2a installed in a state lined up in the horizontal direction will be called the first below-water side roofing material 2a1, the second below-water side roofing material 2a2, the third below-water side roofing material, etc., counting from the first roofing material 2a located at the other end. In addition, the plurality of second roofing materials 2b installed in a state lined up in the horizontal direction on the roof surface will be called the first above-water side roofing material 2b1, the second above-water side roofing material 2b2, the third above-water side roofing material, etc., counting from the second roofing material 2b located at the other end.

[0065] First, the worker places the No. 1 belowwater roofing material 2a1 on the roof underlayment 10. Next, as shown in Fig. 2, the worker places the No. 1 abovewater roofing material 2b1 on the roof underlayment 10 so that the belowwater end of the No. 1 abovewater roofing material 2b1 overlaps the abovewater end of the No. 1 belowwater roofing material 2a1. At this time, the worker fits the protruding portion 203 of the step lower part 23 of the No. 1 abovewater roofing material 2b1 and the belowwater end of the protruding portion 203 of the main body middle part 200 over the abovewater end of the protruding portion 203 of the main body middle part 200 of the No. 1 belowwater roofing material 2a1 and the protruding portion 203 of the step upper part 25, respectively. Also, the one underwater side fitting portion 231A and the underwater end of the one main body fitting portion 205 of the first abovewater side roofing material 2b1 are respectively fitted over the abovewater end of the one main body fitting portion 205 of the first belowwater side roofing material 2a1 and the one abovewater side fitting portion 251A. In this case, the underwater end of the one fitting portion 3 of the first abovewater side roofing material 2b1 where the underwater side cutout portion 30 is formed overlaps on the abovewater end of the one fitting portion 3 of the first belowwater side roofing material 2a1, so that only the other half of the abovewater end of the one fitting portion 3 of the first belowwater side roofing material 2a1 is covered by the first abovewater side roofing material 2b1 and one half is exposed.

[0066] Next, as shown in Fig. 5, the worker fits the other fitting part 4 of the second underwater roofing material 2a2 over the one fitting part 3 of the first underwater roofing material 2a1, and places the second underwater roofing material 2a2 on the roof underlayment 10. At this time, the abovewater end of the other fitting part 4 of the second underwater roofing material 2a2 overlaps one half of the abovewater end of the one fitting part 3 of the first underwater roofing material 2a1 through the belowwater cutout part 30 of the first abovewater roofing material 2b1. After this, the worker fixes the one fitting part 3 of the first underwater roofing material 2a1 and the other fitting part 3 of the second underwater roofing material 2a2 fitted into the one fitting part 3 to the roof underlayment 10 with a fixture 13.

[0067] Next, the worker places the second above-water roofing material 2b2 shown in Figure 1 on the roof underlayment 10 so that its underwater end overlaps the above-water end of the second below-water roofing material 2a2. At this time, the worker fits the protruding portion 203 of the lower step 23 of the second above-water roofing material 2b2 and the underwater end of the protruding portion 203 of the middle body 200 over the above-water end of the protruding portion 203 of the middle body 200 of the second below-water roofing material 2a2 and the protruding portion 203 of the upper step 25, respectively. Also, the underwater end of the one-side underwater fitting portion 231A and the one-side main body fitting portion 205 (see FIG. 2) of the second abovewater side roofing material 2b2 are respectively fitted over the abovewater end of the one-side main body fitting portion 205 and the one-side abovewater fitting portion 251A (see FIG. 2) of the second belowwater side roofing material 2a2. Also, the other fitting portion 4 (see FIG. 2) of the second abovewater side roofing material 2b2 is fitted over the one-side fitting portion 3 (see FIG. 2) of the first abovewater side roofing material 2b1.

[0068] At this time, the underwater end of the other fitting portion 4 of the second above-water roofing material 2b2 overlaps the underwater end of the one fitting portion 3 (see FIG. 5) of the first above-water roofing material 2b1 and the adjacent above-water end of the other fitting portion 4 (FIG. 5) of the second below-water roofing material 2a2. That is, the first below-water roofing material 2a1, the first above-water roofing material 2b1, the second below-water roofing material 2a1, and the second above-water roofing material 2b2 have a three-layer structure having the first layer, the second layer, and the third layer shown below in the part corresponding to the underwater end of the other fitting portion 4 of the second above-water roofing material 2b2. The first layer is composed of the above-water end of the one fitting portion 3 of the first below-water roofing material 2a1. The second layer is composed of the underwater end of the first abovewater roofing material 2b1 at one fitting portion 3 and the abovewater end of the adjacent second belowwater roofing material 2a2 at the other fitting portion 4, and overlaps the first layer. The third layer is composed of the underwater end of the second abovewater roofing material 2b2 at the other fitting portion 4, and overlaps the second layer.

[0069] After this, the worker fixes the one fitting portion 3 of the No. 1 above-water side roofing material 2b1 and the other fitting portion 3 of the No. 2 above-water side roofing material 2b2 fitted into this one fitting portion 3 to the roof underlayment 10 with the fixing device 13. In this case, the one fitting portion 3 of the No. 1 above-water side roofing material 2b1 and the other fitting portion 3 of the No. 2 above-water side roofing material 2b2 are fixed to the roof underlayment 10 at multiple points in the flow direction by the fixing device 13. This work may be performed before fixing the one fitting portion 3 of the No. 1 below-water side roofing material 2a1 and the other fitting portion 3 of the No. 2 below-water side roofing material 2a2 fitted into this one fitting portion 3 to the roof underlayment 10 with the fixing device 13.

[0070] Thereafter, the worker installs the No. 3 below-water side roofing material, the No. 3 above-water side roofing material, the No. 4 below-water side roofing material, the No. 4 above-water side roofing material, etc., in the same manner as the No. 2 below-water side roofing material 2a2 and the No. 2 above-water side roofing material 2b2, thereby completing the installation of multiple roofing materials 2.

[0071] The order in which the roofing materials 2 of this embodiment are installed is not limited. That is, in the above-mentioned construction of the roofing materials 2, the roofing materials 2 are installed in the order of the first underwater roofing material 2a1, the first abovewater roofing material 2b1, the second underwater roofing material 2a2, the second abovewater roofing material 2b2, the third underwater roofing material, the third abovewater roofing material, etc., but may be installed in the order of the first underwater roofing material 2a1, the second underwater roofing material 2a2, the third underwater roofing material, the first abovewater roofing material 2b1, the second abovewater roofing material 2b2, the third abovewater roofing material, etc.

[0072] Furthermore, the roof structure 1 of this embodiment is provided with two types of roofing materials 2, the first roofing material 2a and the second roofing material 2b, but the roofing materials 2 may be provided with only one type of roofing material 2, or may be provided with three or more types of roofing materials 2. In the former case, the roof structure 1 may have, for example, only one type of the first roofing material 2a or only one type of the second roofing material 2b. That is, each roofing material 2 may or may not have the underwater side cutout 30 of the second roofing material 2b.

[0073] The shapes of the one fitting portion 3 and the other fitting portion 4 of the roofing material 2 can be changed. The other side wall portion 209 of the one fitting portion 3 in the roofing material 2 of the modified example shown in Fig. 6 has a step over the entire longitudinal length of the one fitting portion 3 so that the upper portion is located closer to one side than the lower portion. A gap 15 is also formed between this other side wall portion 209 and the other side wall portion 212 of the other roofing material 2 to suppress the rise of rainwater due to capillary action.

[0074] 7 and 8, the lower edge 213 of the one side wall portion 208 of the one fitting portion 3 of the roofing material 2 may be fixed to the roof underlayment 10 by a fastener 16 such as a screw or a nail. When the lower edge 213 of the one fitting portion 3 is fixed to the roof underlayment 10 in this manner, deformation of the one fitting portion 3 is suppressed.

[0075] In the modified roofing material 2 shown in Fig. 8, a protrusion 214 that protrudes toward the front surface is formed on the lower edge 213, and the portion of the lower edge 213 that is laterally outer than the protrusion 214 is fixed to the roof underlayment 10 by the fastener 16. Therefore, even if rainwater on the flat portion 201 passes over the one-side fitting portion 3 and reaches the lower edge 213, this rainwater is drained downstream along the protrusion 214. This prevents rainwater from reaching the portion of the lower edge 213 where the fastener 16 penetrates.

[0076] In addition, each roofing material 2 of the above embodiment may further include a second rising portion 252 extending from the above-water end of each flat portion 201, 202 of the step upper portion 25 toward the surface side, as shown in Fig. 9. In the example shown in Fig. 9, each flat portion 201, 202 of the step upper portion 25 is inclined so that the closer to the above-water end in the front-back direction, the closer to the flat portion 201, 202 of the main body 20. Each second rising portion 252 is formed over the entire length of the above-water end of the corresponding flat portion 201, 202. In this case, rainwater flowing above the water along the upper surface of each flat portion 201, 202 of the step upper portion 25 is blocked by the second rising portion 252, improving the waterproofing of the building.

[0077] In addition, the shape, size and material of each element of the roof structure 1 and roof material 2 of the above embodiment, as well as the construction method of the roof structure 1 and roof material 2, etc. can be changed as appropriate.

[0078] (2) Description As is clear from the above-described embodiment, the roof structure 1 of the first aspect has the following configuration. The roof structure 1 includes an underwater roofing material 2A and an abovewater roofing material 2B arranged on the abovewater side of the underwater roofing material 2A. The underwater roofing material 2A has an underwater roofing material body (the body of the underwater roofing material 2A) 20 and a rising portion 24 extending from the abovewater end of the underwater roofing material body 20 toward the front side. The abovewater roofing material 2B has an abovewater roofing material body (the body of the abovewater roofing material 2B) 20 and a rising portion 22 extending from the belowwater end of the abovewater roofing material body 20 toward the back side. The rising portion 22 is located on the underwater side of the rising portion 24. The rising portion 24 has a protruding portion 240 that protrudes toward the belowwater side more than other portions 244 in the rising portion 24 and has a shorter distance to the rising portion 22 than other portions 244. A gap 14 is formed between the other portion 244 and the rising portion 22 .

[0079] According to this embodiment, the gap 14 prevents rainwater that reaches between the rising portion 24 of the underwater roofing material 2A and the rising portion 22 of the abovewater roofing material 2B from rising due to capillary action. This prevents rainwater on the underwater roofing material body 20 from flowing over the rising portion 24 to the abovewater side, improving the waterproofing of the building.

[0080] The roof structure 1 of the second embodiment can be realized by combining with the first embodiment. The second embodiment has the configuration shown below. The underwater roofing material body 20 has a pair of underwater roofing material body fittings (body fittings of the underwater roofing material 2A) 204 formed on both side ends of the underwater roofing material body 20 and protruding toward the surface side. The abovewater roofing material 2B has a step lower portion 23 extending from the lower end of the rising portion 22 toward the underwater side. The step lower portion 23 overlaps on the underwater roofing material body 20. The step lower portion 23 has a pair of underwater fittings 231 formed on both side ends of the step lower portion 23. The pair of underwater fittings 231 fit into the pair of underwater roofing material body fittings 204, respectively.

[0081] According to this embodiment, the step lower portion 23 overlaps the underwater roofing material body 20, which prevents rainwater on the underwater roofing material body 20 from flowing to the abovewater side, further improving the waterproofing of the building. In addition, the pair of underwater fitting parts 231 fit into the pair of underwater roofing material body fitting parts 204, so that the underwater roofing material 2A and the abovewater roofing material 2B can be firmly connected.

[0082] The roof structure 1 of the third embodiment can be realized by combining with the first or second embodiment. The third embodiment has the following configuration. The below-water side roofing material 2A has a step upper portion 25 extending from the upper end of the rising portion 24 toward the above-water side. The above-water side roofing material body (the body of the above-water side roofing material 2B) 20 overlaps on the step upper portion 25. The step upper portion 25 has a pair of above-water side fitting portions 251 formed on both side ends of the step upper portion 25. The above-water side roofing material body 20 has a pair of above-water side roofing material body fitting portions (the body fitting portions of the above-water side roofing material 2B) 204 formed on both side ends of the above-water side roofing material body 20. The pair of above-water side roofing material body fitting portions 204 fit into the pair of above-water side fitting portions 251, respectively.

[0083] According to this embodiment, by fitting a pair of above-water side roofing material main body fitting portions 204 into a pair of above-water side fitting portions 251, the below-water side roofing material 2A and the above-water side roofing material 2B can be firmly connected.

[0084] The roof structure 1 of the fourth embodiment can be realized by combining with the third embodiment. The underwater roof material 2A of the fourth embodiment further has a second rising portion 252 extending from the rear end of the step upper portion 25 toward the surface side.

[0085] According to this embodiment, rainwater flowing above the water along the upper surface of the step portion 25 can be blocked by the second rising portion 252, further improving the waterproofing of the building.

[0086] The roofing material 2 of the fifth embodiment has the following configuration. The roofing material 2 comprises a main body 20, a rising portion 22 extending from the underwater end of the main body 20 toward the back surface side, and a rising portion 24 extending from the abovewater end of the main body 20 toward the front surface side. The rising portion 24 has a protruding portion 240 that protrudes further toward the underwater side than other portions 244 of the rising portion 24, and when a rising portion 22 of the other roofing material 2 above the water and having the same shape as the rising portion 22 is positioned below the water side of the rising portion 24, the protruding portion 240 has a shorter distance to the rising portion 22 of the other roofing material 2 than the other portions 244.

[0087] According to this embodiment, by forming the protrusion 240 on the rising portion 24, when the roofing material 2 is installed, a gap 14 is formed between the other part 244 of the rising portion 24 and the rising portion 22 of the other roofing material 2 on the water side. Therefore, the gap 14 prevents rainwater that has reached between the rising portion 24 and the rising portion 22 of the other roofing material 2 on the water side from rising due to capillary action. Therefore, the rainwater on the main body 20 is prevented from flowing over the rising portion 24 to the water side, improving the waterproofing of the building. [Explanation of symbols]

[0088] 1 Roof structure 14 Gap 2. Roofing materials 2A Underwater roofing material 2B Above-water roofing material 20 Main body (underwater roofing material main body, abovewater roofing material main body) 204 Main body fitting portion (underwater roof material main body fitting portion, abovewater roof material main body fitting portion) 22 Standing part 23 Lower part 231 Underwater side fitting part 24 Rising section 244 Other parts 25th step top 251 Above-water fitting part 252 Second riser

Claims

1. Underwater roofing material; and an above-water roofing material arranged on the above-water side of the below-water roofing material, The underwater roofing material is The underwater roofing material body, A rising portion extending from the above-water end of the underwater roofing material body toward the surface side, The above-water roofing material is The water-surface roofing material body, A vertical portion extending from the underwater end of the above-water side roofing material body toward the back side, The rising portion is located below the water of the rising portion, The rising portion is The rising portion is bent so as to protrude toward the downstream side more than other parts of the rising portion, and has a protruding portion whose distance to the rising portion is shorter than that of the other parts, A gap is formed between the other portion and the rising portion. Roof structure.

2. A water-underwater roofing material; and an above-water roofing material arranged on the above-water side of the below-water roofing material, The underwater roofing material is The underwater roofing material body, A rising portion extending from the above-water end of the underwater roofing material body toward the surface side, The above-water roofing material is The water-surface roofing material body, A vertical portion extending from the underwater end of the above-water side roofing material body toward the back side, The rising portion is located below the water of the rising portion, The rising portion is A protruding portion protrudes further downstream than other portions of the rising portion and has a shorter distance to the rising portion than the other portions, A gap is formed between the other portion and the rising portion, The underwater roofing material body is The roofing material body has a pair of underwater roofing material body fittings formed on both side ends of the underwater roofing material body and protruding toward the surface side, The above-water roofing material is A step lower portion extends from the lower end of the rising portion toward the downstream side, The step lower portion overlaps the water underside roof material body, The lower part of the stage is A pair of underwater fitting portions are formed on both side ends of the lower stage, The pair of underwater side fitting portions are respectively fitted to the pair of underwater side roof material main body fitting portions, Roof structure.

3. A water underside roofing material; and an above-water roofing material arranged on the above-water side of the below-water roofing material, The underwater roofing material is The underwater roofing material body, A rising portion extending from the above-water end of the underwater roofing material body toward the surface side, The above-water roofing material is The water-surface roofing material body, A vertical portion extending from the underwater end of the above-water side roofing material body toward the back side, The rising portion is located below the water of the rising portion, The rising portion is A protruding portion protrudes further downstream than other portions of the rising portion and has a shorter distance to the rising portion than the other portions, A gap is formed between the other portion and the rising portion, The underwater roofing material is A step portion extends from the upper end of the rising portion toward the water side, The water-side roofing material body overlaps the upper part of the step, The upper part of the step is A pair of above-water fitting portions are formed on both side ends of the upper step, The water-side roofing material body is A pair of above-water side roofing material body fittings are formed on both side ends of the above-water side roofing material body, The pair of above-water side roofing material main body fitting portions are respectively fitted into the pair of above-water side fitting portions, Roof structure.

4. The underwater roofing material is Further comprising a second rising portion extending from the rear end of the step upper portion toward the surface side, The roof structure of claim 3.

5. The main body, A rising portion extending from the water-underwater end of the main body toward the back surface side; A rising portion extending from the above-water end of the main body toward the surface side, The rising portion is The roofing material is bent so as to protrude further toward the underwater side than other parts of the rising portion, and when a rising portion of the other roofing material above the water and having the same shape as the rising portion is located below the water side of the rising portion, the protruding portion has a shorter distance to the rising portion of the other roofing material than the other parts. Roofing materials.

Images