Roof structure, covering material, and method of installing the covering material

Abstract

To provide a roof structure and cover mounting method that can improve waterproofing performance. [Solution] A roof structure according to one aspect of the present invention comprises: a first cover having a top plate disposed on the front side of a base; a first waterproof sheet provided on the back surface of the top plate of the first cover and extending to one side in the first direction of the top plate; a second cover having a top plate disposed on the front side of the base and engaging with one side of the first cover; a second waterproof sheet provided on the back surface of the top plate of the second cover and extending to one side in the first direction of the top plate; and a connector that engages with the second cover and is fastened to the base, wherein the first waterproof sheet is fastened to the base together with the connector.

Description

Technical Field

[0001] The present invention relates to a roof structure, a cover material, and a method for attaching the cover material.

Background Art

[0002] As a building used for a dwelling or the like, for example, a technique using a building structure such as a wooden frame structure, a wooden framework structure, a reinforced structure, or a RC structure is known. Further, as such a roof shape of the building, a roof structure formed by a roof having a flat roof surface is known. As such a roof structure, for example, a technique in which a plurality of plate-like roof base materials are fastened to a field board by fastening nails is known (see, for example, Patent Document 1).

[0003] The above-described roof base material deteriorates in appearance and waterproof performance due to aging. For example, a technique for improving the appearance and waterproof performance by covering the roof base material with a cover, which is a decorative cover, is also known. Such a cover has a top plate, side plates, and a bottom plate for covering the upper surface, end faces, and bottom surface of the roof base material. For example, when attaching a cover onto an existing roof base material, first, a waterproof sheet (asphalt roofing) is disposed on the roof base material, and then the cover is put on, and the cover and the connectors of the cover are fastened to the roof base material with screws or nails.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Therefore, an object of the present invention is to provide a roof structure, a cover material, and a method for attaching the cover material that can improve waterproof performance.

Means for Solving the Problems

[0006] A roof structure according to one aspect of the present invention comprises: a first cover having a top plate disposed on the front side of a base; a first waterproof sheet provided on the back surface of the top plate of the first cover and extending to one side of the top plate in a first direction; a second cover having a top plate disposed on the front side of the base and engaging with one side of the first cover; a second waterproof sheet provided on the back surface of the top plate of the second cover and extending to one side of the top plate in a first direction; and a connector that engages with the second cover and is fastened to the base, wherein the first waterproof sheet is fastened to the base together with the connector. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a roof structure, a cover material, and a method for attaching the cover material that can improve waterproofing performance. [Brief explanation of the drawing]

[0008] [Figure 1] A cross-sectional view showing the configuration of a roof structure according to the first embodiment of the present invention. [Figure 2] A cross-sectional view showing an enlarged view of the roof structure. [Figure 3] A perspective view showing the configuration of the roof structure. [Figure 4] A perspective view showing a part of the roof structure. [Figure 5] A perspective view showing the configuration of the connecting suspension devices for the roof structure. [Figure 6] A perspective view showing the configuration of the cover members of the roof structure. [Figure 7] A cross-sectional view showing a part of the roof structure. [Figure 8] An explanatory diagram showing the configuration of the roof structure. [Figure 9] A perspective view of a roof structure according to another embodiment. [Figure 10] A cross-sectional view showing a part of the roof structure. [Figure 11] A perspective view showing the configuration of the cover members of the roof structure. [Figure 12]An explanatory diagram showing the configuration of a roof structure according to another embodiment. [Figure 13] An explanatory diagram showing the configuration of a roof structure according to another embodiment. [Figure 14] Diagram illustrating the roof structure of the comparative example. [Figure 15] Diagram illustrating the roof structure of the comparative example. [Figure 16] An explanatory diagram showing the movement of water in a roof structure according to the first embodiment. [Figure 17] An explanatory diagram showing the movement of water in a roof structure according to the first embodiment. [Modes for carrying out the invention]

[0009] Hereinafter, the configuration of the roof structure 1 using the cover 15 according to the first embodiment of the present invention and the method of attaching the cover 15 will be described with reference to Figures 1 to 8. Figure 1 is a cross-sectional view showing the configuration of the roof structure according to this embodiment, and Figure 2 is an enlarged cross-sectional view showing the configuration of the roof structure. Figures 3 and 4 are perspective views showing the configuration of the same roof structure. Figure 5 is a perspective view showing the configuration of the connecting hanger, and Figure 6 is a perspective view showing the configuration of the cover member. Figure 7 is a perspective view showing the configuration of a part of the roof structure, and Figure 8 is an explanatory diagram showing the configuration of the roof structure. In each figure, the configuration is shown enlarged, reduced, or omitted as appropriate for explanatory purposes. For example, the water flow is shown with appropriate spacing to make it easier to understand, or a part of the configuration is cut out to explain the internal structure. In addition, the cross-sections of the underlayment 12 and the waterproof sheet 16 are shown using different line types, such as dashed lines, for explanatory purposes.

[0010] The roof structure 1 comprises a roof decking board 11, underlayment 12, multiple roof base materials 13 as a base section, multiple fastening nails 14, multiple covers 15, a waterproof sheet 16, connecting hangers 17 (connectors) for connecting the multiple covers 15, and fastening members 18. Joints 19 are provided between the multiple covers 15 as needed. In addition, flashing or end covers are provided at the ends in each direction of the roof structure 1 as appropriate.

[0011] Note that the roof structure 1 may have other members such as a heat insulation sheet and a ventilation member in addition to the underlayment 12 between the sheathing 11 and the roof base material 13.

[0012] The sheathing 11 is fastened to the rafters by nails or the like. The sheathing 11 is formed of, for example, structural plywood. Note that the sheathing 11 may be MDF (Medium Density Fiberboard), particle board, OSB (Oriented Strand Board), or a single board material such as a solid cedar board.

[0013] The first underlayment 12 is a so-called roofing sheet having waterproof properties. For example, the underlayment 12 is formed by impregnating and / or coating asphalt on a base material. The underlayment 12 is fastened to, for example, the sheathing 11. As a specific example, the underlayment 12 is provided on the surface board of the sheathing 11.

[0014] The plurality of roof base materials 13 are arranged in a plurality of rows in the first direction, which is the inclined direction (vertical direction) of the sheathing 11 from the ridge 101 toward the eaves 102, and in the second direction, which is the width direction (lateral direction) orthogonal or intersecting the first direction. For example, a joint is arranged between adjacent roof base materials 13 in the second direction.

[0015] The plurality of roof base materials 13 are partially laminated in the inclined direction (first direction) from the ridge 101 toward the eaves 102 and are fastened to the sheathing 11 to which the underlayment 12 is fastened by fastening nails 14 (fastening members). The roof base material 13 is formed in a plate shape. The roof base material 13 is, for example, a decorative slate or the like.

[0016] The fastening nail 14 is used in the roof structure 1, for example, to fasten the roof base material 13 to the roof sheathing 11. The fastening nail 14 is driven into the roof sheathing 11, for example, in the thickness direction of the roof sheathing 11, in other words, in a direction perpendicular to the surface direction of the main surface of the roof sheathing 11. However, the direction in which the fastening nail 14 is driven is not limited to the thickness direction of the roof sheathing 11. The fastening nail 14 comprises, for example, a head 141 and a nail portion 142. The head 141 is formed in the shape of a disc. The nail portion 142 is integrally formed on one main surface of the head 141. The nail portion 142 is formed in the shape of a cylinder. The nail portion 142 also has, for example, a plurality of ring-shaped projections formed at equal intervals in the axial direction (longitudinal direction) of the nail portion 142. The multiple protrusions improve the fastening force that secures the roof base material 13 to the roof sheathing 11 when the fastening nails 14 are driven into the roof sheathing 11. In other words, the multiple protrusions improve the tensile strength, which is the holding force that prevents the fastening nails 14 from being pulled out of the roof sheathing 11 when they are driven into the roof sheathing 11. The multiple protrusions are provided, for example, at least in the parts that are placed within the roof sheathing 11 so as to improve the fastening force between the roof sheathing 11 and the roof base material 13. The number and shape of the protrusions can be set as appropriate as long as they improve the fastening force.

[0017] The cover 15 covers one or more of the roof base materials 13. For example, the cover 15 is a decorative cover that improves the appearance and waterproofing of the roof base materials 13 when their appearance and waterproofing deteriorate due to aging or other reasons. The cover 15 is arranged in multiple rows in both the vertical and horizontal directions in the roof structure 1. In this embodiment, end covers are provided for the roof base materials 13 located at the ends on the ridge 101 side and the ends on the eaves 102 side.

[0018] As shown in Figure 6, the cover 15 comprises a top plate 151, side plates 152, and a bottom plate 153. The cover 15 is formed integrally by bending a steel plate, for example, with a thickness of about 0.35 mm to 0.5 mm, to form the top plate 151, side plates 152, and bottom plate 153. For example, the cover 15 has a return portion 154 (first return portion) at the end of the top plate 151 on the ridge 101 side, which has a plate-like portion that is bent to the front side and folded back toward the eaves 102 side. In addition, the cover 15 has a return portion 155 (second return portion) at the end of the top plate 151 on the eaves 102 side, which is bent in two places and folded back toward the back side and ridge side by the side plates 152 and bottom plate 153. Multiple covers 15 are engaged in the inclined direction via connecting hangers 17 and installed on the roof base material 13. The cover 15 may have multiple drainage holes formed at predetermined locations. The cover 15 is painted or otherwise treated to provide water resistance, weather resistance, and an aesthetically pleasing appearance.

[0019] Multiple covers 15 are arranged adjacent to each other, partially overlapping in the vertical direction. For example, each cover 15 is formed to be larger and shaped than the width of multiple roof base materials arranged horizontally. For instance, one cover 15 is attached to multiple roof base materials 13 arranged in the width direction.

[0020] The top plate 151 is constructed in a flat shape and covers at least the area of ​​the upper surface of the roof base material 13 that is exposed to the outside. The width dimension of the top plate 151 is set to be larger than the width dimension of one roof base material 13. The depth dimension of the top plate 151 is set to be such that when a cover 15 is placed on the roof base material 13 on the eaves side of a pair of adjacent roof base materials 13, with a portion of the cover overlapping in the sloping direction from the ridge 101 to the eaves 102, the top plate 151 covers at least a portion of the roof base material 13 on the ridge side. In other words, the vertical dimension of the top plate 151 is constructed to be approximately the effective dimension of the roof base material 13. Therefore, one cover 15 covers, for example, approximately the entire effective surface of the target roof base material 13 and extends to a predetermined location, slightly separated towards the eaves side from the other roof base material 13 that is stacked on top of it. The effective dimension is the dimension of the effective surface that does not overlap with the roof base material 13 on the ridge side, and is the pitch in the direction in which the roof base materials 13 are arranged. In other words, one cover 15 is provided at each level so as to cover the surface of one roof base material 13. Here, depth refers to the direction of the downstream (eaves 102) side and the upstream (ridge 101) side in the roof structure 1. The shape of the top plate 151 follows the step formed at the boundary between the roof base materials 13.

[0021] Furthermore, the top plate 151 is provided with a return portion 154 at its edge on the ridge 101 side, which has a return piece that is bent outwards and extends towards the eaves. The return portion 154 engages with the connecting hanger 17.

[0022] The side panel 152 is integrally connected to the top panel 151 and the bottom panel 153. The side panel 152 covers the side of the roof base material 13 on the eaves 102 side. The width dimension of the side panel 152 is set to be the same as, for example, the width dimension of the top panel 151. The side panel 152 is positioned on the eaves 102 side of the top panel 151. The side panel 152 is inclined at an obtuse angle with respect to the surface along the surface direction of the top panel 151, such that the side on the bottom panel 153 side is closer to the eaves 102 than the side on the top panel 151 side. In other words, the angle of the side panel 152 with respect to the underside of the top panel 151 (the main inner surface of the cover 15) is obtuse.

[0023] The bottom plate 153 forms a return portion 155 that is bent from the end of the side plate 152 of the roof base material 13 and extends toward the ridge 101. The width dimension of the bottom plate 153 is set to the same dimension as the width dimension of the top plate 151. For example, the bottom plate 153 bends from the side plate 152 to form an inclined surface that slopes toward the ridge side toward the roof base material 13. In other words, the end of the bottom plate 153 is located on the back side of the bent portion that forms the boundary with the side plate 152, and the bottom plate 153 forms an inclined surface that opens toward the eaves side between it and the top plate 151 of the lower cover which is positioned opposite it.

[0024] Multiple covers 15 have a return portion 154 on the ridge-side edge that is bent outwards, and a return portion 155 on the eaves-side edge that is bent outwards. Multiple covers 15 arranged in the inclined direction are assembled sequentially by the ridge-side return portion 154 engaging with the connecting hanger 17 and the eaves-side return portion 155 of the upper cover 15.

[0025] A waterproof sheet 16, which is a second underlayment, is attached to the cover 15. In this embodiment, the waterproof sheet 16 is attached to the back surface of the top plate 151 of the cover 15, thereby forming a cover member 150 comprising the cover 15 and the waterproof sheet 16.

[0026] In a plan view, the waterproof sheet 16 is positioned and adhered to the top plate 151 of the cover 15, overlapping it at predetermined distances above and to one side. That is, a portion of the waterproof sheet 16 overlaps the top plate 151 of the cover 15, and a portion extends outward from the top plate 151 of the cover 15. In other words, on the underside of the top plate 151, portions are formed where the waterproof sheet 16 is not attached to the eaves-side edge and the other edge in the second direction.

[0027] For example, the waterproof sheet 16 is adhered to the underside of the top plate 151 of the cover 15. In the first direction, the waterproof sheet 16 extends toward the ridge 101 side beyond the ridge 101 side end of the cover 15. Also, in the second direction, which is the width direction, the waterproof sheet 16 extends toward one side beyond one end of the cover 15. For example, the waterproof sheet 16 is formed such that the connecting hanger 17 that engages with the cover 15 on which the waterproof sheet 16 is provided extends to the surface of another roof base material 13 that is stacked one level above the roof base material 13 fastened by the fastening member 18, and the connecting hanger 17 that engages with the roof base material 13 above is fastened by the fastening member 18. Therefore, a part of the waterproof sheet 16 attached to the lower roof base material is provided at the fastening portion fastened by the fastening member 18. Since the fastening portion is set at a position higher by the thickness of one roof base material 13, rainwater intrusion can be prevented.

[0028] The waterproof sheet 16 is a so-called roofing sheet that has waterproof properties. For example, a breathable and waterproof underlayment is used as the waterproof sheet 16. The waterproof sheet 16 has, for example, a laying section 161 and an extension section 162 which are integrally continuous and placed on the back surface of the cover 15. The laying section 161 covers the part above the top of the fastening member 18 that fastens the lower roof base material 13 and connecting hangers 17 to the roof deck 11. On the other hand, the waterproof sheet 16 has an extension section 162 that extends toward the ridge from the cover 15, and this extension section 162 is fastened to the roof deck 11 together with the next upper roof base material 13 and connecting hangers 17. The waterproof sheet 16 is adhered to the back surface of the top plate 151 of the cover 15 with adhesive material such as double-sided tape or adhesive. For example, as shown in Figure 6, the adhesive portions Pa on the waterproof sheet 16 that are attached to the cover 15 with adhesive material are arranged so that the unadhesive portions are in a continuous position in the longitudinal direction. As an example, several adhesive portions Pa are formed along the longitudinal direction. Therefore, unadhesive passages are formed at both ends in the longitudinal direction. For example, the adhesive material is a double-sided tape made of a flexible material, and may be configured to be elastically deformable, or it may be foamy and compressible. For example, as the adhesive material, a double-sided tape is used that comprises a foam layer containing synthetic rubber or EPDM, a base material made of cotton cloth or the like, and an adhesive layer having a butyl rubber-based adhesive. When an elastically deformable adhesive material is used in this way, vibration damping can be improved, and the soundproofing effect that suppresses rain noise and the like can be improved.

[0029] In the following description, in a pair of roof base materials 13 that are partially stacked and arranged vertically, the roof base material 13 on the eaves 102 side will be referred to as the first roof base material 13A, and the roof base material 13 on the ridge 101 side will be referred to as the first roof base material 13B. The cover 15 on the eaves 102 side will be referred to as the first cover 15A, and the cover 15 on the ridge 101 side will be referred to as the second cover 15B. Multiple covers 15 and roof base materials 13 provided in intermediate stages other than the lowest and highest stages in the direction of inclination can be the first roof base material 13A or the first cover 15A, or the second roof base material 13B or the second cover 15B, depending on their relative relationship with the paired cover 15 or roof base material 13.

[0030] A first cover 15A is attached to the first roof base material 13A, covering at least the eaves end, and a second cover 15B is attached to the second roof base material 13B, covering at least the eaves end.

[0031] Each cover 15B, 15A has its top plate 151 positioned on the front side of the roof base materials 13A, 13B to which it is attached. For example, the top plate 151 of the upper cover 15B is positioned so as to cover the roof base material 13B, the connecting hanger 17B, and the extended portion 162 which is part of the waterproof sheet 16A (first waterproof sheet) attached to the cover 15A that is placed over the roof base material 13A, one level below the roof base material 13B, with the fastening portion of the fastening member 18 that fastens them to the roof deck 11. At this time, the return portion 155 on the eaves side of the cover 15B engages with the return piece on the eaves side of the connecting hanger 17 and the return portion 154 of the lower cover 15A.

[0032] The pair of vertically aligned covers 15A and 15B are connected and arranged by engaging the return portion 154 formed on the ridge-side edge of the top plate 151 of the eaves-side cover 15A (eaves-side cover) with the return portion 155 formed on the eaves-side edge of the ridge-side cover 15B (ridge-side cover).

[0033] In other words, the top plate 151 of the ridge cover 15B and the protective sheet 16B (second waterproof sheet) are positioned on the front side of the fastening portion that fastens the extended portion 162 of the waterproof sheet 16A extending from the eaves cover 15A to the roof base material 13B on the ridge side, and cover the front side of the fastening portion. Specifically, the head 181 of the fastening member 18 is covered from the front side, and the front side of the fastening hole into which the fastening member 18 is fastened is covered.

[0034] The connecting hanger 17 is partially positioned between the ridge-side return portion 154 of the top plate 151 of the eaves-side cover 15A and the eaves-side return portion 155 of the ridge-side cover 15B, which is one of two covers 15 arranged in the inclined direction. The connecting hanger 17 is constructed by bending a metal plate. As shown in Figure 5, the connecting hanger 17 integrally and continuously has a base piece 171 and a return portion 172 that serves as a locking portion. The connecting hanger 17 has a width dimension smaller than the width dimension of the roof base material 13 and is positioned partially overlapping a portion of the roof base material 13. For example, the connecting hanger 17 is constructed by bending a rectangular flat sheet metal member having a predetermined width dimension at multiple locations in the first direction.

[0035] The base piece 171 has a first bent portion 171a that is bent at multiple points on the ridge side of the fastening portion and bulges out on the front side, and a second bent portion 171b that is bent at multiple points on the ridge side of the return portion 172 and bulges out on the front side. The first bent portion 171a is formed when the sheet metal member constituting the base piece 171 is bent into a mountain-fold shape that bulges out on the front side, and valley folds are made at positions spaced apart on both sides of the top of the mountain fold. For example, the fastening member 18 is fastened between the top of the first bent portion 171a and the valley fold on the eaves side.

[0036] Furthermore, in the second bent portion 171b, the sheet metal member constituting the base piece 171 is on the ridge side of the return portion 172, and is bent in a valley fold toward the front side at a point corresponding to the step where the number of layers of the roof base material 13 increases, is mountain-folded with a predetermined point on the eaves side as the apex, and is further folded back to the back side at a predetermined point on the eaves side, thereby forming the return portion 172. For example, in the second bent portion 171b, drainage holes 174 may be formed in the valley fold portion where the base piece 171 is folded back toward the front side.

[0037] The folds of the first bent portion 171a, the second bent portion 171b, and the return portion 172 all extend along the width direction.

[0038] The return portion 172 is formed on the eaves side of the base piece 171. The return portion 172 has a return piece 172a that is bent at the eaves-side edge of the base piece 171 and extends diagonally toward the roof base material 13 and the ridge 101. The return portion 172 engages with the upper return portion 154 of the lower cover 15A and with the lower return portion 155 of the upper cover 15B, and is held and positioned.

[0039] In other words, the return portion 172 is connected to the pair of covers 15 by engaging with the return portion 155, which is the corner portion between the side plate 152 and the bottom plate 153 of the upper cover 15B, and by engaging with the return portion 154 on the ridge side of the lower cover 15A. For example, the return piece 172a of the return portion 172 is inclined along the surface of the bottom plate 153 or the return piece 154a. For example, the return portion 172 has a surface that is inclined with respect to the base piece 171 in a direction that opens towards the eaves.

[0040] The connecting hanger 17 is positioned at the stepped portion of a pair of adjacent roof base materials 13A and 13B in the direction of inclination. For example, the upper connecting hanger 17B is fastened by a fastening member 18 to the roof base material 13B positioned below the base piece 171 and to the extended portion 162 of the waterproof sheet 16A that extends from the cover 15A placed over the roof base material 13A one step below the roof base material 13B. That is, the base piece 171 of the connecting hanger 17 is fastened by a fastening member 18 to the first roof base material 13A and the second roof base material 13B, which are partially stacked in the first direction, and to the extended portion 162 of the first waterproof sheet 16A which is placed on top of their front sides, and the return portion 172 engages with the return portion 155 of the ridge-side cover 15B and the return portion 154 of the eaves-side cover 15A, and is assembled.

[0041] The fastening member 18 is, for example, a screw. The fastening member 18 is used, for example, to fasten the connecting hanger 17 to the roof decking 11 via the roof base material 13.

[0042] The fastening member 18 integrally comprises, for example, a disc-shaped head 181 and a cylindrical nail portion 182. An annular packing may be provided on the outer circumference of the base end of the head side of the nail portion 182. The nail portion 182 has a spirally formed projection on its outer surface.

[0043] As shown in Figure 4, the joint 19 is provided between adjacent covers 15 in the width direction. For example, the joint 19 is located on the front side of the roof base material 13 and on the back side of the cover 15. As shown in Figures 4 and 8, the joint 19 comprises, for example, a top surface portion 191 formed along the top plate 151 of the cover 15, a ridge-side return portion 192 formed by folding the ridge-side end of the top surface portion 191 back to the front side, and a bent portion 193 formed by bending the eaves-side end of the top surface portion 191 to the eaves side and back side.

[0044] For example, as shown in Figure 7, in the roof structure 1, special fittings such as ridge caps 103 are installed at the ends, such as the ridge and parallel wall sections. Therefore, for the roof base material 13 near the special fittings, an end cover 15C of the type that is inserted under the special fitting and fixed with screws is attached using an end hanger 27. For example, a ridge cap 103 is provided to cover the ridge 101 and the ridge 101 side end of the roof base material 13 placed on the ridge 101, and the ridge cap 103 is fastened to the roof sheathing 11 via a coping. In such a roof structure 1, for example, at the uppermost section adjacent to the ridge cap 103, the end cover 15C and the hanger 27 are fixed via fastening members 273 such as screws. The end cover 15C comprises a top plate 151, side plates 152 and a bottom plate 153, and the top plate 151 is flat with no return on the ridge side. For example, the flat end of the end cover 15C is inserted into the gap between the ridge cap 103 and the roof base material 13. The end cover 15C can be used by cutting the top plate 151 of the cover 15 to a predetermined length.

[0045] The end hanger 27 is formed by bending a metal plate and integrally comprises a plate-shaped base piece 271 and a spring piece 272 which is a plate-shaped member that has been bent multiple times and extends from the end of the base piece 271. The base piece 271 of the end hanger 27 is fastened to the roof base material 13 or the waterproof sheet 16. The spring piece 272 of the end hanger 27 is positioned inside the bend of the return portion 155 of the end cover 15C, which is made up of the side plate 152 and the bottom plate 153, and is fastened and fixed to the side plate 152 with screws. Because the spring piece 272 has multiple bent portions, the angle of the end hanger 27 can be easily adjusted and it can deform to follow the positional relationship with the surrounding material. Therefore, the shape of the end hanger 27 can be deformed to match the shape and size of the roof base material 13, and the position can be adjusted by deforming the spring piece 272 to match the distance between the ridge cap 103 and the roof base material 13 through elastic deformation.

[0046] Next, the method for attaching the cover 15 in the manufacturing method of the roof structure 1 according to this embodiment will be described. In the method for attaching the cover 15 according to this embodiment, the cover 15 and connecting hangers 17 are assembled one row at a time, starting from the eaves side. That is, the cover attachment step of placing the cover 15 over the roof base material 13 from the eaves side, the connection step of setting the connecting hanger 17 by hooking it onto the upper return portion 154 of the cover 15, and the fastening step of fastening the connecting hanger 17 to the roof base material 13 are repeated. For example, in this embodiment, an example is shown in which one cover 15 is attached to three roof base materials 13 arranged in the width direction. In the assembly step, the covers 15 are attached sequentially from the row on the eaves side to the row on the ridge side, in fixed widths or one row at a time extending in the width direction.

[0047] In the cover installation process, the cover 15A is placed over the existing roof base material 13A. At this time, the cover 15A is placed over the roof base material 13A from the eaves side so that the lower return portion 155 of the cover 15A covers the eaves-side edge of the roof base material 13A. For example, in the case of the second row and beyond, the bottom plate 153 of the cover 15 is installed by inserting it into the return portion 154 of another cover 15 that is already installed on the eaves side. Also, at the position where the connecting hanger 17 is placed on the eaves-side cover 15, the bottom plate 153 of the cover 15 is installed by inserting it into the gap formed between the return portion 172 of the connecting hanger 17 and the top plate 151 of the cover 15 on the eaves side 102. As a result, the vertically arranged covers 15 are positioned so that they partially overlap each other in the vertical direction.

[0048] Furthermore, multiple adjacent covers 15 in the horizontal direction are installed butt-jointed and do not overlap each other in the horizontal direction. Joints 19 are provided between multiple adjacent covers 15 in the horizontal direction. Note that there may be a gap of, for example, about 5 mm between multiple adjacent covers 15. For example, after assembling one cover 15 by placing it over the roof base material 13, the joint 19 is positioned between the cover 15 and the waterproof sheet 16 by inserting one side of the joint 19 from the side. Then, the other side of the joint 19 is inserted between the cover 15 and the waterproof sheet 16, and the other cover 15 is placed over the roof base material 13 and assembled. In this way, the joint 19 is positioned so that, for example, both sides in the horizontal direction are inserted between the cover 15 and the waterproof sheet 16, thereby closing the inside between the pair of covers 15, 15. At this time, similar to the connecting hanger 17, the return portions on both vertical sides of the joint 19 are engaged with the return portions 154 and 155 of the cover 15, respectively. The connecting hanger 17 is installed in a position that does not interfere with the joint 19.

[0049] With the cover 15A attached, the top surface of the roof base material 13A is covered by the top plate 151 and the waterproof sheet 16 attached to the back surface of the top plate 151. At this time, the upper return portion 154 of the cover 15A is positioned at the part adjacent to the eaves side of the step difference between the roof base material 13A with the cover 15A attached and the roof base material 13B of the next higher level, and the extended portion 162 of the waterproof sheet 16, which extends from the upper return portion 154 toward the ridge 101, is placed over the front surface of the upper roof base material 13B. For example, the extended portion 162 is located in the middle of the upper roof base material 13B and is positioned to extend to a position toward the ridge 101 beyond the fastening position where the hanger 17 is fastened to the roof base material 13B.

[0050] Next, the connecting hanger 17 is installed while engaging it with the upper return portion 154 of the attached cover 15A. At this time, the connecting hanger 17 is placed over the eaves side of the return portion 154 with the return portion 172 of the connecting hanger 17, and the base piece 171 is placed over the front side of the roof base material 13B. At this time, the surface of the roof base material 13B is already covered with the waterproof sheet 16A that extends from the cover 15A below. Therefore, the base piece 171 is positioned on the roof base material 13B and the extended portion 162 of the waterproof sheet 16 that is placed over it. Next, the fastening member 18 is fastened from the front side of the base piece 171, thereby fastening the roof base material 13B, the waterproof sheet 16, and the base piece 171 placed on top of them with the fastening member 18.

[0051] Next, the cover 15B is attached to the roof base material 13B using the same procedure. These processes are repeated for each subsequent row. The cover attachment process, the hanger installation process, and the fastening process are repeated the required number of times in order from the row on the eaves 102 side to the row on the ridge 101 side, thereby completing the attachment of the cover 15 to the roof. Therefore, after the lower row is fastened, the upper row cover 15 and waterproof sheet 16 are placed over the front side of the fastening part and attached.

[0052] With the cover 15 and roof structure 1 configured in this way, the connecting hanger 17 is engaged with the cover 15 which has a waterproof sheet 16 on its back surface, and the connecting hanger 17 is fastened to the roof base material 13. After fastening, the front side of the fastening member 18 is covered by the cover 15 and waterproof sheet 16 which are provided in the upper section, so rainwater that penetrates from above flows down towards the eaves on the surface side of the waterproof sheet and is discharged to the outside from the engagement part. Therefore, the waterproof performance can be improved. In addition, since the waterproof sheet 16 is provided on the cover 15, the double-layered waterproof sheet 16 can be easily laid by installing the cover 15.

[0053] Furthermore, according to the above embodiment, the ridge-side return portion 154 of the lower cover 15A, the connecting hanger 17, and the eaves-side return portion 155 of the upper cover 15B overlap, so that there are no gaps in the interlocking parts of each component, thereby preventing rainwater from entering. In addition, the cover 15, which is made of a bent metal plate, is elastically deformable, and even in the parts where there is no connecting hanger 17, no gaps are created between the front and rear ends of the pair of covers 15, so a high waterproofing effect can be obtained.

[0054] For example, in the roof structure 1000 shown in Figures 14 and 15 as a comparative example, a waterproof sheet is first installed over the entire roof, then the cover 1015 is installed, and fastening members 1018 such as fastening screws / nails are installed over the waterproof sheet 1016, so they penetrate the waterproof sheet 1016. In such a structure, rainwater may seep in by overcoming the interlocking parts 10154 and 10155 of the covers 1015. Also, for example, as in the comparative example, if the return part 10155 on the eaves side is U-shaped, rainwater that has seeped in once is difficult to drain, so it tends to accumulate at the tip, and rainwater that has overflowed the end on the ridge side due to wind pressure may flow down the back of the cover 1015 and merge with rainwater that has flowed in from the lower interlocking part, increasing the amount of water.

[0055] On the other hand, in the above embodiment, even if rainwater intrusion occurs due to wind-driven rain, the rainwater overflowing from the engagement portion between the covers 15, 15 flows down the waterproof sheet 16 towards the eaves. For example, as shown in Figure 16, water such as rainwater that enters from above flows over the waterproof sheet 16 towards the eaves and is discharged. Also, even if rainwater intrusion occurs due to wind-driven rain, as shown by the dashed line in Figure 17, it can be discharged by passing over the waterproof sheet 16, as shown by the solid arrow in Figure 17. Furthermore, no fastening holes are formed in the waterproof sheet 16 where rainwater that has entered the engagement portion flows, and the fastening portion is positioned on the roof base material 13 one level higher than the engagement portion. Therefore, it is set at a higher position by the thickness of the roof base material 13, which can further improve waterproofing performance.

[0056] Furthermore, in the above embodiment, the waterproof sheet 16 is not fully adhered to the cover 15, and there are areas between the cover 15 and the waterproof sheet 16 that are not adhered. Therefore, rainwater that seeps in from above does not accumulate and can easily be discharged by passing between the cover 15 and the waterproof sheet 16. Furthermore, if there is a gap between the covers 15 in the lateral direction, rainwater that has seeped in from above can be discharged through that gap. Also, water can be discharged towards the eaves from the ends of the hangers 17 in the width direction, or from the drainage holes 174 as shown by the arrows in Figure 17. In addition, the bottom plate 153 of the cover 15 and the return pieces 172a and 154 of the return portion 172 of the connecting hanger 17 are all inclined so that the eaves side opens outwards, thus promoting the discharge of moisture.

[0057] It should be noted that the present invention is not limited to the embodiments described above, and can be modified in various ways during implementation without departing from its essence.

[0058] For example, the above embodiment shows an example in which the cover 15 is attached to an existing roof base material 13, but it is not limited to this. For example, as shown in Figures 9 to 11, it is also applicable when the cover 15 is used as a roofing material in a roof structure that does not have an existing base material 13. For example, the roof base may not be an existing roofing material such as slate, but rather a roof decking board 11 as the base part.

[0059] For example, the roof structure 100 shown in Figures 9 to 11 comprises a roof decking board 11 as a base, underlayment 12, a laminated base 25 (laminated material), multiple fastening nails 14, multiple covers 15, a waterproof sheet 16, connecting hangers 17 (connectors) for connecting the multiple covers 15, and fastening members 18. Joints are also provided between the multiple covers 15 as needed. In addition, flashing or end covers are provided at the ends in each direction as appropriate.

[0060] The roof sheathing boards 11 are fastened to the rafters with nails or the like. The roof sheathing boards 11 are made of, for example, structural plywood. However, the roof sheathing boards 11 may also be made of MDF (Medium Density Fiberboard), particleboard, OSB (Oriented Strand Board), or even a single board of solid cedar wood.

[0061] The first underlayment 12 is a so-called roofing sheet that has waterproof properties. For example, the underlayment 12 is fastened to the roof decking 11, for example. Specifically, the underlayment 12 is installed on the surface of the roof decking 11.

[0062] The laminated base 25 is laminated and fastened on top of the roof sheathing 11 and the underlayment 12. For example, the laminated base 25 is positioned adjacent to the ridge side of each cover 15 and forms a step by supporting the back side of the base piece 171 of the connecting hanger 17. For example, the laminated base 25 is a plate-shaped member having the necessary thickness and width dimensions to support the base piece 171, and is fastened to the roof sheathing 11 to which the underlayment 12 is attached by fastening nails 14 (fastening members).

[0063] Multiple covers 15 are arranged adjacent to each other, with some overlap in the vertical direction. The multiple covers 15 are installed on the front side of the roof sheathing 11 and the underlayment 12, covering the roof sheathing 11 and the underlayment 12. Each cover 15 comprises a top plate 151, side plates 152, and a bottom plate 153. Multiple covers 15 arranged in the inclined direction are assembled sequentially by engaging the return portion 154 on the ridge side with the connecting hanger 17 and the return portion 155 on the eaves side of the upper cover 15.

[0064] A waterproof sheet 16, which is a second underlayment, is attached to the cover 15. In this embodiment, the waterproof sheet 16 is attached to the back surface of the top plate 151 of the cover 15, thereby forming a cover member 150 comprising the cover 15 and the waterproof sheet 16.

[0065] For example, the waterproof sheet 16 is adhered to the back surface of the top plate 151 of the cover 15. In the first direction, the waterproof sheet 16 extends toward the ridge 101 side beyond the ridge 101 side end of the cover 15. Also, in the second direction, which is the width direction, the waterproof sheet 16 extends toward one side beyond one end of the cover 15. For example, the waterproof sheet 16 is formed to a length that reaches the surface of a laminated base 25 provided on a roof deck 11 fastened by a fastening member 18, and the surface of the laminated base 25 one level above and the connecting hanger 17 installed on that laminated base 25 are fastened by the fastening member 18. Therefore, a part of the waterproof sheet 16 provided on the lower cover 15 is arranged at the fastening portion fastened by the fastening member 18. That is, the fastening portion of the waterproof sheet 16 is set at a higher position due to the step formed by the thickness of the laminated base 25, thereby improving the effect of preventing rainwater intrusion. It is also not necessary to provide the stacking base 25. For example, even if the stacking base 25 is not provided, a difference in height can be obtained due to the slope of the roof, and the multiple waterproof sheets 16 are arranged so that they partially overlap, and the waterproof sheets 16 are placed over the fastening parts, so that the effect of preventing rainwater from entering can be obtained in the same way as in the above embodiment.

[0066] Therefore, in a newly constructed roof structure, the cover 15 itself can be used as a roofing material and installed by connecting it with the connecting hanger 17. In this case as well, since the front side of the fastening member 18 is covered by the waterproof sheet 16 and the cover 15, rainwater that penetrates from above flows down towards the eaves on the surface side of the waterproof sheet and is discharged to the outside from the engagement part. Therefore, the waterproofing performance can be improved. In addition, since the waterproof sheet 16 is provided on the cover 15, the double-layered waterproof sheet 16 can be easily laid by installing the cover 15.

[0067] Furthermore, according to the above embodiment, the ridge-side return portion 154 of the lower cover 15A, the connecting hanger 17, and the eaves-side return portion 155 of the upper cover 15B overlap, so that there are no gaps in the interlocking parts of each component, thereby preventing rainwater from entering. In addition, the cover 15, which is made of a bent metal plate, is elastically deformable, and even in the parts where there is no connecting hanger 17, no gaps are created between the front and rear ends of the pair of covers 15, so a high waterproofing effect can be obtained.

[0068] In the above embodiment, the connecting hanger 17 and joint 19 are made of flat plate-shaped members and have a shape in which the eaves side slopes downward in the middle, but they are not limited to this. For example, they may be made of corrugated sheet-shaped members. If the joint 19 and connecting hanger 17 are made of corrugated sheet and have a configuration with protrusions extending in the vertical direction, it is possible to suppress water rising due to capillary action. In addition, since the connecting hanger 17 is reinforced by the bent parts 171a and 172b, deformation due to loads such as being stepped on from above during construction can be suppressed. Furthermore, since the bent parts 171a and 172b are separated on the front side from the member below, water can not be transmitted by capillary action, etc., and waterproofing performance can be improved.

[0069] Furthermore, although the above embodiment shows an example where the adhesive portion Pa is adhered in a line shape, it is not limited to this. For example, it is sufficient to create a passage for water to flow between the cover 15 and the waterproof sheet 16, and the adhesive portion Pa may be dispersed in a dotted manner at multiple locations.

[0070] Furthermore, as shown in Figures 12 and 13, in another embodiment, in order to promote water drainage, the edge portion 153a of the bottom plate 153 that overlaps with the joint 19 may be cut in a V-shape so that the gap between the folded edges is widened. According to this embodiment, rainwater that accumulates at the eaves can be efficiently drained.

[0071] Furthermore, each embodiment may be combined as appropriate, and in that case, the combined effects can be obtained. Moreover, the above embodiments include various inventions, and various inventions can be extracted by selecting combinations from the multiple constituent elements disclosed. For example, if the problem can be solved and effects obtained even if some constituent elements are deleted from all the constituent elements shown in the embodiment, then the configuration with these constituent elements deleted can be extracted as an invention. [Explanation of symbols]

[0072] 1,100…Roof structure, 11…Sheathing boards, 12…Underlayment, 13…Roof base material, 13A…Roof base material, 13B…Roof base material, 14…Fastening nails, 15…Cover (roofing material), 15A…Eaves cover, 15B…Ridge cover, 15C…End cover, 16 (16A, 16B)…Protection sheet, 17, 17A ...connecting hanger, 27...end hanger, 18...fastening member, 19...joint, 25...laminated base, 101...ridge, 102...eaves, 103...ridge cap, 150...cover member, 151...top plate, 152...side plate, 153...bottom plate, 154...return section, 154a...return piece, 155...return section, 161...laying section, 162...extension section, 171...base piece, 172...return section, 172a...return piece, 181...head, 191...top surface, 192...ridge side return section, 193...bent section, 271...base piece, 272...spring piece.

Claims

1. A first cover having a top plate positioned on the front side of the base, A first waterproof sheet is provided on the underside of the top plate of the first cover and extends to one side in the first direction of the top plate, A top plate is positioned on the front side of the base portion, and a second cover engages with one side of the first cover, A second waterproof sheet is provided on the underside of the top plate of the second cover and extends to one side of the top plate in the first direction, A connector that engages with the second cover and is fastened to the base portion, Equipped with, The waterproof sheet mentioned above is fastened to the base portion together with the connector, forming a roof structure.

2. The base portion is The first roof base material, The roof base material comprises a second roof base material which is partially overlapped with the first roof base material on one side in the first direction, The roof structure according to claim 1, wherein the connector is fastened to the second roof base material.

3. The device includes a connector that engages with one end of the first cover, which is attached to the first roof base material, and is fastened to the second roof base material. A portion of the first waterproof sheet, which is provided on the back side of the first cover attached to the first roof base material, is placed between the connector and the second roof base material. The second roof base material, the first waterproof sheet, and the connector are fastened together by a fastening member. The roof structure according to claim 2, wherein a second cover attached to the second roof base material and a second waterproof sheet provided on the back surface of the top plate of the second cover are arranged on the front side of the fastening member.

4. The first cover comprises a top plate that covers at least a portion of the surface of the first roof base material, a first return portion bent outwards from one end of the top plate, and a second return portion positioned at the other end of the first roof base material and bent outwards. The connector has a locking portion that engages with the first return portion of the first cover, and a base piece that extends from the locking portion to one side and is fastened to the second roof base material. The roof structure according to claim 3, wherein a second return portion of one of the multiple covers arranged in a first direction engages with a first return portion of the other cover.

5. The cover comprises a top plate facing the surface side of the base portion, a bottom plate disposed on the back side of at least a part of the connector, and side plates connecting the top plate and the bottom plate. The roof structure according to claim 3, wherein the base portion has roofing material arranged in multiple rows in the first direction and in a second direction intersecting the first direction.

6. The aforementioned base portion consists of roof sheathing and The roof structure according to claim 1, comprising a laminated material arranged on the front side of the roof sheathing.

7. A cover with a top panel positioned opposite the front of the base, A cover member comprising a waterproof sheet attached to the underside of the top plate, with a portion of it extending beyond the top plate to one side in the first direction.

8. The cover member according to claim 7, wherein the waterproof sheet extends to one side of the top plate in a second direction intersecting the first direction.

9. The first cover comprises a top plate covering the surface of the first roof base material and a first waterproof sheet provided on the underside of the top plate, and has engaging portions on the ridge side and the eaves side, respectively. The return portion of the connector, which has a return portion and a base piece, is engaged with the ridge side engaging portion of the first cover and assembled. The base piece is fastened to the first roof base material together with the first waterproof sheet. A method for attaching a cover, comprising: after fastening, engaging a second cover having a top plate and a waterproof sheet, which is positioned on the front side of the fastening portion, with the first cover and the connector, and then covering and attaching it to the second roof base material positioned above the first roof base material.

10. The first cover comprises a top plate covering the surface of the base portion and a first waterproof sheet provided on the underside of the top plate, and has engaging portions on the ridge side and the eaves side, respectively. The return portion of the connector, which has a return portion and a base piece, is engaged with the ridge side engaging portion of the first cover and assembled. The base piece is fastened to the base portion together with the first waterproof sheet. A method for attaching a cover, comprising: after fastening, engaging a second cover having a top plate and a waterproof sheet, which is positioned on the front side of the fastening portion, with the first cover and the connector to attach it.

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