Roof structure

Abstract

The present invention provides fastening hardware and a roof structure that can easily improve the accuracy of screw positioning when fastening the first roof panel to the purlin. [Solution] The fastening fitting 16 fastens the first roof panel 11 to the purlin 18. The first roof panel 11 has a first fitting portion 41. The first fitting portion 41 is provided at one end of the first roof panel 11 in the short direction and has a recess 42 recessed on the other side of the first roof panel 11 in the short direction and a stepped portion 43 provided above the recess 42 and on the other side of the first roof panel 11 in the short direction than the bottom surface of the recess 42. The fastening fitting 16 includes a plate-shaped member 55 positioned above the recess 42 and on one side of the stepped portion 43 in the short direction of the first roof panel 11, a retaining portion 56 provided on the plate-shaped member 55 that engages with the recess 42, and one or more screw holes 57 that penetrate the plate-shaped member 55.

Description

Technical Field

[0001] The present invention relates to a retaining fitting and a roof structure.

Background Art

[0002] A roof structure in which a plurality of roof panels are connected is known (see, for example, Patent Document 1). Patent Document 1 discloses a flat roof in which a heat insulation panel as a roof panel is connected by fitting a fitting convex portion and a fitting concave portion. By driving a fixing tool such as a screw or a nail from above the heat insulation panel to a building body such as a main roof, the heat insulation panel is retained to the building body. A gap between adjacent heat insulation panels is closed with a tape using an aluminum foil.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the flat roof described in Patent Document 1, it is difficult to position a fixing tool when retaining a heat insulation panel to a building body.

[0005] An object of the present invention is to provide a retaining fitting and a roof structure that can easily improve the accuracy of screw positioning when retaining a first roof panel to a main roof.

Means for Solving the Problems

[0006] The fastening fitting according to the present invention is a fastening fitting for fastening a roof structure to a purlin, the roof structure comprising a first roof panel having a first fitting portion and a second roof panel having a second fitting portion that fits with the first fitting portion, wherein each of the first roof panel and the second roof panel has an insulating material and two metal outer shells facing each other with respect to the insulating material, the first fitting portion is provided at one end of the first roof panel in the short direction, and has a recessed recess on the other side of the first roof panel in the short direction, and is provided above the recess and on the other side of the first roof panel in the short direction than the bottom surface of the recess The second fitting portion has a stepped portion and is provided at the other end of the second roof panel in the short direction, and has a convex portion that protrudes to the other side of the second roof panel in the short direction and fits into the recess, and a cover portion provided above the convex portion with a gap between it and the convex portion, extending to the other side of the second roof panel in the short direction and covering the stepped portion, and is provided on the upper side of the recess and on one side of the stepped portion in the short direction of the first roof panel, and includes a locking portion provided on the plate-like member that engages with the recess, and one or more screw holes that penetrate the plate-like member.

[0007] The roof structure according to the present invention comprises the fastening fittings described above, a first roof panel provided on a plurality of purlins and having a first fitting portion, a second roof panel provided on a plurality of purlins adjacent to the first roof panel and having a second fitting portion that fits with the first fitting portion, and a waterproof and airtight tape attached to the upper surface of the first roof panel and the upper surface of the second roof panel so as to cover the gap between the first fitting portion and the second fitting portion, each of the first roof panel and the second roof panel having an insulating material and two metal outer skins facing each other with respect to the insulating material, the first fitting portion is provided at one end of the first roof panel in the short direction, and the first roof panel in the short direction The first roof panel has a recessed area on the other side and a stepped portion provided above the recess and on the other side in the short direction of the first roof panel, beyond the bottom surface of the recess. The second fitting portion is provided at the other end of the second roof panel in the short direction and has a protrusion that projects outwards on the other side in the short direction of the second roof panel and fits into the recess, and a cover portion provided above the protrusion with a gap between it and the protrusion, extending to the other side in the short direction of the second roof panel and covering the stepped portion. The waterproof and airtight tape has an adhesive layer adhered to the upper surface of the first roof panel and the upper surface of the second roof panel, and an aluminum layer provided on the adhesive layer. The fastening hardware fastens the first roof panel to the purlin. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide fastening hardware and a roof structure that can easily improve the accuracy of screw positioning when fastening the first roof panel to the purlin. [Brief explanation of the drawing]

[0009] [Figure 1] This is a partially broken perspective view showing the structure of the roof. [Figure 2] This is a partially enlarged cross-sectional view of the roof structure. [Figure 3] This is a cross-sectional view illustrating the configuration of the first mating portion. [Figure 4] This is a cross-sectional view illustrating the configuration of the second mating portion. [Figure 5] This is a cross-section of waterproof and airtight tape. [Figure 6] This is an enlarged view of section A shown in Figure 2. [Figure 7] This is an enlarged view showing the state in which the gap between the concave and convex parts is filled with foam material. [Figure 8] This is an enlarged perspective view showing the configuration of the fastening hardware. [Figure 9] This is an enlarged perspective view showing an alternative arrangement of the fasteners. [Modes for carrying out the invention]

[0010] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the following description and drawings, common components are denoted by the same reference numerals. Descriptions of components denoted by the same reference numerals will be omitted as appropriate.

[0011] Figure 1 is a partially broken perspective view showing the configuration of the roof structure 10. Figure 2 is a partially enlarged cross-sectional view of the roof structure 10. In the figures, the X-axis direction is the front-to-back direction, the Y-axis direction perpendicular to the X-axis direction is the left-to-right direction, and the Z-axis direction perpendicular to both the X-axis and Y-axis directions is the up-and-down direction.

[0012] As shown in Figures 1 and 2, the roof structure 10 comprises a first roof panel 11, a second roof panel 12, a waterproof and airtight tape 13, a waterproof and fireproof laminate 14, a foam material 15, and fastening hardware 16. In Figure 1, the second roof panel 12, the waterproof and airtight tape 13, and the urethane film 31, primer 32, and topcoat 33 constituting the waterproof and fireproof laminate 14 are shown sequentially shifted to the right relative to the first roof panel 11.

[0013] The first roof panel 11 is provided on multiple purlins 18. Figure 1 shows two purlins 18 spaced apart from each other in the left-right direction (Y-axis direction). Figure 2 is a cross-sectional view of the roof structure 10 cut along the rightmost purlin 18 of the two purlins 18 spaced apart from each other in the left-right direction.

[0014] The main roof 18 is made of steel purlins or the like. The main roof 18 extends in the front-rear direction (X-axis direction). The main roof 18 is provided on a plurality of beams. The beams extend in the left-right direction. The beams are provided on columns (not shown). The columns extend in the up-down direction (Z-axis direction). The thickness of the main roof 18 is, for example, 2.3 mm or more.

[0015] The second roof panel 12 is provided on a plurality of main roofs 18 adjacent to the first roof panel 11. In this example, the second roof panel 12 is provided on the front side of the first roof panel 11.

[0016] Each of the first roof panel 11 and the second roof panel 12 extends in the left-right direction (Y-axis direction). Each of the first roof panel 11 and the second roof panel 12 is formed in a rectangular shape in plan view. In the first roof panel 11 and the second roof panel 12, the left-right direction is referred to as the longitudinal direction, and the front-rear direction (X-axis direction) is referred to as the short-side direction. The longitudinal direction may be referred to as the long-side direction. The short-side direction may be referred to as the short-side direction.

[0017] In the present embodiment, a plurality of first roof panels 11 are arranged in the left-right direction (Y-axis direction), and a plurality of second roof panels 12 are arranged in the left-right direction adjacent to the plurality of first roof panels 11.

[0018] Each of the first roof panel 11 and the second roof panel 12 has a heat insulating material 21 and two metal outer skins 22, 23 facing each other through the heat insulating material 21. The first roof panel 11 and the second roof panel 12 are excellent in fire resistance due to the heat insulating material 21 and the metal outer skins 22, 23. The first roof panel 11 and the second roof panel 12 are also referred to as heat insulating sandwich panels or heat insulating panels.

[0019] The insulation material 21 is composed of, for example, inorganic insulation material, foamed resin insulation material, etc. Examples of inorganic insulation material include rock wool and glass wool. Examples of foamed resin insulation material include polystyrene foam, rigid polyurethane foam, polyisocyanurate foam, and phenolic foam. The thickness of the insulation material 21 is, for example, 20 mm to 200 mm.

[0020] The metal outer shells 22 and 23 are made of various types of steel sheets, such as galvalume steel sheet (registered trademark) and painted hot-dip galvanized steel sheet. The thickness of the metal outer shells 22 and 23 is, for example, 0.2 mm to 2 mm.

[0021] The waterproof and airtight tape 13 is provided along the gap 19 between the adjacent first roof panel 11 and the second roof panel 12. The waterproof and airtight tape 13 extends in the left-right direction (Y-axis direction).

[0022] The waterproof and fireproof laminate 14 is provided to cover the first roof panel 11, the second roof panel 12, and the waterproof and airtight tape 13. The waterproof and fireproof laminate 14 has a urethane film 31, a primer 32, and a topcoat 33.

[0023] The urethane film 31 is composed of a thermosetting urethane rubber coating. The standard usage amount of the urethane film 31 is, for example, 2 kg / m². 2 The urethane film 31 has self-extinguishing, flame-retardant, and waterproof properties.

[0024] The primer 32 is provided on the underside of the urethane film 31. The primer 32 is composed of a urethane resin-based primer. The standard amount of primer 32 used is, for example, 0.05 kg / m 2 The primer 32 adheres the urethane film 31 to the upper surface of the first roof panel 11, the upper surface of the second roof panel 12, and the upper surface of the waterproof and airtight tape 13.

[0025] The topcoat 33 is applied to the upper surface of the urethane film 31. The topcoat 33 is composed of an acrylic urethane-based finishing paint. The standard usage amount of the topcoat 33 is, for example, 0.2 kg / m². 2 The top coat 33 is intended to protect the urethane film 31 from ultraviolet rays.

[0026] The urethane film 31, primer 32, and topcoat 33 constituting the waterproof and fireproof laminate 14 are all formed by application using an application device such as a spray gun. Therefore, as shown in Figure 2, the waterproof and fireproof laminate 14 can seamlessly fill the gap formed by the waterproof and airtight tape 13 and the metal outer shell 22. Because the urethane film 31, primer 32, and topcoat 33 are formed by application, the surface (top surface) of the waterproof and fireproof laminate 14 becomes a flat surface. "Flat" includes not only cases where it is perfectly flat, but also cases where it is substantially flat, that is, cases where it differs within the scope that does not depart from the spirit of the invention.

[0027] As shown in Figure 2, the first roof panel 11 has a first fitting portion 41. The first fitting portion 41 is provided at one end of the first roof panel 11 in the short direction (front-rear direction, X-axis direction). One side is the front side in the front-rear direction, and the other side is the rear side in the front-rear direction.

[0028] Figure 3 is a cross-sectional view illustrating the configuration of the first fitting portion 41. As shown in Figure 3, the first fitting portion 41 has a recess 42 and a stepped portion 43.

[0029] The recess 42 is recessed on the other side (rear side) in the short direction of the first roof panel 11. The recess 42 has a bottom surface 42a, an upper front surface 42b, a lower front surface 42c, an upper inner wall surface 42d, a lower inner wall surface 42e, an upper surface 42f, and a lower surface 42g.

[0030] The bottom surface 42a is composed of a pair of folded portions formed by folding the ends of the metal outer shell 22 and the metal outer shell 23 towards the insulation material 21, and an exposed portion of the insulation material 21 exposed between the folded portions. In Figure 3, the ends of the metal outer shell 22 and the metal outer shell 23 are folded in an L-shape. The bottom surface 42a has a stepped shape in which one side surface of the L-shaped portion of the metal outer shell 22 and the surface of the exposed portion of the insulation material 21 are arranged on the same plane, and one side surface of the L-shaped portion of the metal outer shell 23 is positioned one side (front) of the one side surface of the L-shaped portion of the metal outer shell 22 and the surface of the exposed portion of the insulation material 21. "Same" includes not only cases where they are completely the same, but also cases where they are substantially the same, that is, cases where they differ within the scope that does not depart from the spirit of the invention. The shape of the bottom surface 42a is not limited to a stepped shape, but may also be a planar shape, a curved shape, etc.

[0031] The upper tip surface 42b is above the bottom surface 42a and positioned to one side of the bottom surface 42a. The lower tip surface 42c is below the bottom surface 42a and positioned to one side of the bottom surface 42a. The lower tip surface 42c may also be positioned to one side of the upper tip surface 42b. In other words, the upper tip surface 42b may be positioned to the other side of the lower tip surface 42c. By positioning the upper tip surface 42b to the other side of the lower tip surface 42c, it becomes easier to secure a gap for positioning the retaining portion 56 of the fastening fitting 16, which will be described later.

[0032] The upper inner wall surface 42d connects the bottom surface 42a and the upper front surface 42b. Specifically, one end of the upper inner wall surface 42d is connected to the lower end of the upper front surface 42b, and the other end of the upper inner wall surface 42d is connected to the upper end of the bottom surface 42a.

[0033] The lower inner wall surface 42e connects the bottom surface 42a and the lower front surface 42c. Specifically, one end of the lower inner wall surface 42e is connected to the upper end of the lower front surface 42c, and the other end of the lower inner wall surface 42e is connected to the lower end of the bottom surface 42a. The upper inner wall surface 42d faces the lower inner wall surface 42e.

[0034] The upper surface 42f is positioned above the upper inner wall surface 42d. One end of the upper surface 42f is connected to the upper end of the upper tip surface 42b. The length of the upper surface 42f in the X-axis direction may be longer than the length of the upper inner wall surface 42d in the X-axis direction. That is, the other end of the upper surface 42f may be positioned on the other side of the bottom surface 42a, which is connected to the other end of the upper inner wall surface 42d.

[0035] The lower surface 42g is positioned below the lower inner wall surface 42e. One end of the lower surface 42g is connected to the lower end of the lower tip surface 42c. The length of the lower surface 42g in the X-axis direction may be longer than the length of the upper surface 42f in the X-axis direction. That is, the other end of the lower surface 42g may be positioned on the other side of the other end of the upper surface 42f. The lower surface 42g extends to the other end of the first roof panel 11.

[0036] The stepped portion 43 is located above the recess 42 and on the other side (rear side) in the short direction of the first roof panel 11, beyond the bottom surface 42a of the recess 42. The stepped portion 43 has an upper surface 43a, a lower side surface 43b, and an upper side surface 43c. The upper surface 43a is located above the upper surface 42f of the recess 42. The lower side surface 43b extends downward from one end of the upper surface 43a. The lower side surface 43b connects the upper surface 43a of the stepped portion 43 to the upper surface 42f of the recess 42. The upper side surface 43c extends upward from the other end of the upper surface 43a.

[0037] The second roof panel 12 has a second fitting portion 45 that fits with the first fitting portion 41 (see Figure 2). The second fitting portion 45 is provided at the other end of the second roof panel 12 in the short direction.

[0038] Figure 4 is a cross-sectional view illustrating the configuration of the second fitting portion 45. As shown in Figure 4, the second fitting portion 45 has a protrusion 46 and a cover portion 47.

[0039] The protrusion 46 protrudes from the other side in the short direction of the second roof panel 12 and fits into the recess 42 (see Figure 2). The protrusion 46 has a tip surface 46a, an upper base end surface 46b, a lower base end surface 46c, an upper surface 46d, and a lower surface 46e.

[0040] In Figure 4, the tip surface 46a is composed of a pair of folded portions formed by folding the ends of the metal outer shell 22 and the metal outer shell 23 towards the insulation material 21. The insulation material 21 is not exposed between the folded portions of the tip surface 46a, but it may be exposed.

[0041] The upper base end surface 46b is located above the tip end surface 46a and is positioned to one side of the tip end surface 46a. In Figure 4, the upper base end surface 46b is a curved surface that is recessed on one side. The upper base end surface 46b is not limited to being a curved surface; it may also be a flat surface.

[0042] The lower base end face 46c is located below the tip end face 46a and is positioned on one side of the tip end face 46a. In Figure 4, the lower base end face 46c is a flat surface. The lower base end face 46c is not limited to being a flat surface; it may also be a curved surface.

[0043] The upper surface 46d connects the tip surface 46a and the upper base surface 46b. Specifically, one end of the upper surface 46d is connected to the lower end of the upper base surface 46b, and the other end of the upper surface 46d is connected to the upper end of the tip surface 46a.

[0044] The lower surface 46e connects the front end surface 46a and the lower base end surface 46c. Specifically, one end of the lower surface 46e is connected to the upper end of the lower base end surface 46c, and the other end of the lower surface 46e is connected to the lower end of the front end surface 46a.

[0045] The cover portion 47 is provided above the protrusion 46 with a gap between it and the protrusion 46, and extends to the other side in the short direction of the second roof panel 12 to cover the stepped portion 43. The cover portion 47 has a first lower surface 47a, a second lower surface 47b, and an upper side surface 47c.

[0046] The first lower surface 47a is located on the other side of the second lower surface 47b. When the first fitting portion 41 and the second fitting portion 45 are fitted together, the first lower surface 47a faces the upper surface 43a of the stepped portion 43. The first lower surface 47a is a horizontal surface. "Horizontal" includes not only cases where it is perfectly horizontal, but also cases where it is substantially horizontal, that is, cases where it differs without departing from the spirit of the invention.

[0047] The second lower surface 47b connects the first lower surface 47a and the upper base end surface 46b. Specifically, one end of the second lower surface 47b is connected to the other end of the first lower surface 47a, and the other end of the second lower surface 47b is connected to the upper end of the upper base end surface 46b. The second lower surface 47b is an inclined surface that slopes upward in the vertical direction (Z-axis direction) from the front side to the rear side in the front-to-back direction (X-axis direction).

[0048] The upper side surface 47c extends upward from the other end of the first lower surface 47a. When the first fitting portion 41 and the second fitting portion 45 are fitted together, the upper side surface 43c of the first fitting portion 41 and the upper side surface 47c of the second fitting portion 45 face each other, and a gap 19 is formed between the upper side surface 43c and the upper side surface 47c.

[0049] When the first fitting portion 41 and the second fitting portion 45 are fitted together, the space 61 (see Figure 2) is defined by the upper surface 42f of the recess 42, the lower side surface 43b of the stepped portion 43, the upper base end surface 46b of the convex portion 46, and the first lower surface 47a and second lower surface 47b of the cover portion 47.

[0050] The waterproof and airtight tape 13 is attached to the upper surface of the first roof panel 11 and the upper surface of the second roof panel 12 so as to cover the gap 19 between the first fitting portion 41 and the second fitting portion 45 (see Figure 2).

[0051] Figure 5 is a cross-sectional view of the waterproof and airtight tape 13. As shown in Figure 5, the waterproof and airtight tape 13 has an adhesive layer 51 and an aluminum layer 52.

[0052] The adhesive layer 51 is bonded to the upper surface of the first roof panel 11 and the upper surface of the second roof panel 12. The adhesive layer 51 is made of butyl rubber, acrylic rubber, etc. The thickness of the adhesive layer 51 is 0.1 mm or more and 0.5 mm or less. The waterproof and airtight tape 13 has excellent waterproofing properties due to the thickness and adhesive strength of the adhesive layer 51. The aluminum layer 52 is provided on the adhesive layer 51. The aluminum layer 52 is made of aluminum. Conventional insulation panels have a simple fitting shape, and fire easily rises from below to above, so tapes with flammable adhesive layers such as butyl rubber and acrylic rubber could not be used. With the fitting shape of the first fitting part 41 and the second fitting part 45 of the present invention, fire is less likely to rise, so tapes with a flammable adhesive layer 51 can be used.

[0053] The width (length in the X-axis direction) of the waterproof and airtight tape 13 is set so that when the waterproof and airtight tape 13 is applied along the gap 19 between the fitted first roof panel 11 and the second roof panel 12, a gap 19 is created between them, and a gap 19 is created to ensure an adhesive margin of approximately 20 mm to 30 mm in the X-axis direction relative to the upper surfaces of the adjacent first roof panel 11 and second roof panel 12. The width of the waterproof and airtight tape 13 is, for example, 75 mm.

[0054] Figure 6 is an enlarged view of the recess 42 and the protrusion 46. As shown in Figure 6, when the first fitting portion 41 and the second fitting portion 45 are fitted together, a gap G1 is formed between the bottom surface 42a of the recess 42 and the tip surface 46a of the protrusion 46, a gap G2 is formed between the upper inner wall surface 42d of the recess 42 and the upper surface 46d of the protrusion 46, and a gap G3 is formed between the lower inner wall surface 42e of the recess 42 and the lower surface 46e of the protrusion 46. Gaps G1, G2, and G3 are in communication with each other. In this embodiment, gaps G1, G2, and G3 are formed when the first fitting portion 41 and the second fitting portion 45 are fitted together, but it is sufficient if at least gaps G1 and G2 are formed. A foam material 15 is placed in gap G1.

[0055] The foam material 15 is provided between the recess 42 and the protrusion 46. Specifically, the foam material 15 is placed in the gap G1 between the bottom surface 42a of the recess 42 and the tip surface 46a of the protrusion 46. The foam material 15 is made of, for example, expanded graphite. Since waterproofing and airtightness are ensured by the waterproof and airtight tape 13 under normal conditions, the foam material 15 does not have waterproofing or airtightness. Therefore, under normal conditions, as shown in Figure 6, there is a gap around the foam material 15, and it is not positioned in a way that ensures waterproofing and airtightness.

[0056] Figure 7 is an enlarged view showing the state in which the gaps G1, G2, and G3 between the recess 42 and the protrusion 46 are filled with the foam material 15. As shown in Figure 7, the foam material 15 expands when heated by fire, filling the gaps G1, G2, and G3 between the recess 42 and the protrusion 46 and preventing fire from passing through. The gaps G1, G2, and G3 between the recess 42 and the protrusion 46 are areas with weak resistance to the expansion of the foam material 15, so the expanded foam material 15 fills in there. In addition to the vertical direction (Z-axis direction) in which fire can easily pass through, the foam material 15 is also filled in the front-back direction (X-axis direction) and the left-right direction (Y-axis direction), making it even more difficult for fire to pass through compared to the case where only the gap G1 is filled with the foam material 15.

[0057] The fastening bracket 16 fastens the first roof panel 11 to the purlin 18. The fastening bracket 16 is positioned on the upper surface 42f of the recess 42 of the first roof panel 11, corresponding to the purlin 18 (see Figure 1). Figure 1 shows a fastening bracket 16 positioned corresponding to the left purlin 18 of two purlins 18 that are spaced apart from each other in the left-right direction (Y-axis direction). Although not shown in Figure 1, a fastening bracket 16 is also positioned corresponding to the right purlin 18 of two purlins 18 that are spaced apart from each other in the left-right direction.

[0058] Figure 8 is an enlarged perspective view showing the configuration of the fastening fitting 16. The fastening fitting 16 shown in Figure 8 is a fastening fitting positioned in conjunction with the rightmost purlin 18 of two purlins 18 (see Figure 1) that are spaced apart from each other in the left-right direction (Y-axis direction).

[0059] The fastening fitting 16 comprises a plate-shaped member 55, a locking portion 56, and a screw hole 57.

[0060] The plate-like member 55 is positioned above the recess 42 and on one side (front side) of the stepped portion 43 in the short-side direction (front-to-back direction, X-axis direction) of the first roof panel 11. Specifically, the plate-like member 55 is positioned on the upper surface 42f of the recess 42 corresponding to the purlin 18. In this example, the plate-like member 55 is formed in a rectangular shape in plan view, but it may be formed in a circular, elliptical, polygonal, or other shape in plan view.

[0061] The locking portion 56 is provided on the plate-shaped member 55 and locks into the recess 42. The locking portion 56 is positioned along the longitudinal direction (left-right direction, Y-axis direction) of the first roof panel 11. The locking portion 56 is positioned in the gap between the upper tip surface 42b of the recess 42 (see Figures 6 and 7) and the upper base end surface 46b of the convex portion 46 (see Figures 6 and 7), and locks into the upper tip surface 42b. The locking portion 56 locks into the upper tip surface 42b, thereby positioning the fastening fitting 16 in the X-axis direction. In this example, the locking portion 56 is formed in a rectangular shape in plan view, but it may be formed in a circular, elliptical, polygonal, or other shape in plan view.

[0062] The locking portion 56 has a structure that is bent relative to the plate-shaped member 55. In this example, the locking portion 56 is provided at a right angle to the plate-shaped member 55. That is, the fastening fitting 16 is formed in an L-shape. The locking portion 56 is not limited to being provided at a right angle to the plate-shaped member 55, but may also be provided at an acute or obtuse angle to the plate-shaped member 55.

[0063] The screw hole 57 penetrates the plate-shaped member 55 in its thickness direction. The thickness direction of the plate-shaped member 55 is the Z-axis direction. A screw 58 is inserted into the screw hole 57. By inserting the screw 58 into the screw hole 57 and tightening it, the first roof panel 11 can be attached to the purlin 18. The screw 58 penetrates the other side of the bottom surface 42a of the recess 42 (see Figure 2).

[0064] In the width direction (Y-axis direction) of the purlin 18, the screw holes 57 can be aligned simply by aligning the fastening bracket 16 with the purlin 18. In the length direction (X-axis direction) of the purlin 18, since the locking portion 56 is locked into the recess 42, the distance from the locked portion of the recess 42 to the screw holes 57 can be kept constant. Therefore, when fastening the first roof panel 11 to the purlin 18, the accuracy of positioning the screws 58 can be easily improved.

[0065] Since the fastening bracket 16 is fixed to the first roof panel 11 across its surface, the fastening strength and wind pressure resistance are improved compared to when the first roof panel 11 is fastened to the purlin 18 with a single screw. In the example in Figure 8, there are four screw holes 57, but this is not limited to this number; one or more are sufficient. When there are multiple screw holes 57, the distance between the screw holes 57 becomes constant, improving the accuracy of positioning between the screws 58. For example, by arranging two screw holes 57 in the width direction (Y-axis direction) of the purlin 18, the fastening strength can be improved while appropriately positioning the screws 58.

[0066] The head 59 of the screw 58 is housed in the space 61 between the upper surface 42f of the recess 42 of the first roof panel 11 and the first lower surface 47a and the second lower surface 47b of the lid 47 of the second roof panel 12, and is covered by the lid 47. As a result, the upper surfaces of the first roof panel 11 and the second roof panel 12 become flat, allowing the waterproof and airtight tape 13 to be applied accurately and improving waterproofing.

[0067] Figure 9 is an enlarged perspective view showing another arrangement of the fastening fittings 16. As shown in Figure 9, two purlins 18 are arranged adjacent to each other in the left-right direction (Y-axis direction), a first roof panel 11 is provided for each purlin 18, and fastening fittings 16 are provided in the recesses 42 of each first roof panel 11.

[0068] The retaining portion 56 is positioned along the shorter side (front-to-back direction, X-axis direction) of the first roof panel 11. The retaining portion 56 is engaged with the left-to-right (Y-axis direction) end face of the recess 42. The engagement of the retaining portion 56 with the left-to-right end face of the recess 42 positions the fastening bracket 16 in the Y-axis direction.

[0069] Each fastening bracket 16 has its interlocking portion 56 facing each other. The end faces of adjacent first roof panels 11 are butted together via each interlocking portion 56. Since the thickness of the interlocking portion 56 is 2.3 mm, the contact between the opposing interlocking portions 56 ensures a gap of approximately 5 mm between the end faces of adjacent first roof panels 11. Conventionally, a plate-shaped member was separately prepared to be sandwiched between adjacent first roof panels 11 in order to ensure the gap between the end faces of adjacent first roof panels 11, but by using the fastening bracket 16, the plate-shaped member is no longer necessary. In addition, the screw holes 57 of the fastening bracket 16 can be made into four (two sets of two holes arranged side by side along the perpendicular portion between the interlocking portion 56 and the plate-shaped member 55). This allows the first roof panel 11 to be fastened to the purlin 18 using the same fastening fitting 16, in both cases where the locking portion 56 is positioned along the short side of the first roof panel 11 and where the locking portion 56 is positioned along the longitudinal side of the first roof panel 11. Specifically, in the former case, two screw holes are used along the perpendicular portion between the locking portion 56 and the plate-like member 55, and in the latter case, two screw holes are used in a direction perpendicular to the direction along the perpendicular portion between the locking portion 56 and the plate-like member 55. Fastening in the longitudinal direction (long side direction) of the first roof panel 11 is also referred to as fastening of the general portion. Fastening in the short side direction (short side direction) of the first roof panel 11 is also referred to as fastening of the butt portion.

[0070] As described above, the roof structure 10 comprises a first roof panel 11 having a first fitting portion 41, a second roof panel 12 having a second fitting portion 45, and a waterproof and airtight tape 13 provided to cover the gap 19 between the first fitting portion 41 and the second fitting portion 45. The first roof panel 11 and the second roof panel 12 have an insulating material and two metal outer layers, and are excellent in fire resistance. The waterproof and airtight tape 13 has an adhesive layer 51 and an aluminum layer 52, and is excellent in waterproofing due to the thickness and adhesive strength of the adhesive layer 51. Therefore, the roof structure 10 is excellent in both fire resistance and waterproofing.

[0071] The roof structure 10 is provided with a waterproof and fireproof laminate 14 on the upper surface of the first roof panel 11, the upper surface of the second roof panel 12, and the upper surface of the waterproof and airtight tape 13. The waterproof and fireproof laminate 14 has a urethane film 31, a primer 32, and a topcoat 33. Since the urethane film 31, primer 32, and topcoat 33 are all formed by coating, the gaps formed by the waterproof and airtight tape 13 and the metal outer shell 22 can be filled without gaps, resulting in excellent waterproofing and fireproofing. Therefore, the roof structure 10 further equipped with the waterproof and fireproof laminate 14 has excellent fire resistance, waterproofing, and fireproofing.

[0072] In the roof structure 10, a foam material 15 is provided between the recess 42 of the first fitting part 41 and the protrusion 46 of the second fitting part 45. The foam material 15 expands when heated by fire, filling the gap between the recess 42 and the protrusion 46. In addition to the vertical direction (Z-axis direction) where fire can easily pass through, the foam material 15 is also filled in the front-to-back direction (X-axis direction) and the left-to-right direction (Y-axis direction), making it even more difficult for fire to pass through. Therefore, the roof structure 10 further equipped with the foam material 15 has even better fire resistance and fire prevention properties.

[0073] The adhesive layer 51 of the waterproof and airtight tape 13 is made of butyl rubber. Due to the fitting shape of the first fitting part 41 and the second fitting part 45, it is difficult for fire to rise from below, making it possible to use a waterproof and airtight tape 13 equipped with an adhesive layer 51 made of flammable butyl rubber.

[0074] The fastening bracket 16 comprises a plate-shaped member 55 positioned above the recess 42 and on one side (front side) of the stepped portion 43 in the short-side direction (front-to-back direction, X-axis direction) of the first roof panel 11, a retaining portion 56 provided on the plate-shaped member 55 that engages with the recess 42, and one or more screw holes 57 that penetrate the plate-shaped member 55. By simply aligning the fastening bracket 16 with the purlin 18, the screw holes 57 in the width direction (Y-axis direction) of the purlin 18 can be easily aligned. Because the retaining portion 56 engages with the recess 42, the distance from the engaged portion of the recess 42 to the screw holes 57 in the length direction (X-axis direction) of the purlin 18 can be kept constant. Therefore, the fastening bracket 16 can easily improve the accuracy of the positioning of the screws 58 when fastening the first roof panel 11 to the purlin 18.

[0075] The locking portion 56 is positioned along the short side of the first roof panel 11, or along the longitudinal side of the first roof panel 11. Using the same fastening hardware 16, the first roof panel 11 can be fastened to the purlin 18 in both cases: when the locking portion 56 is positioned along the short side of the first roof panel 11, and when the locking portion 56 is positioned along the longitudinal side of the first roof panel 11.

[0076] The roof structure 10, by providing fastening fittings 16, makes it easy to improve the accuracy of positioning the screws 58 when fastening the first roof panel 11 to the purlin 18.

[0077] The present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from the spirit of the invention.

[0078] In the above embodiment, the first roof panel 11 has a first fitting portion 41 on one side, but is not limited to this. The first roof panel 11 may have a first fitting portion 41 on one side and a second fitting portion 45 on the other side.

[0079] In the above embodiment, the second roof panel 12 has a second fitting portion 45 on the other side, but is not limited to this. The second roof panel 12 may have a second fitting portion 45 on the other side and a first fitting portion 41 on one side.

[0080] In the above embodiment, the roof structure 10 includes a three-layer waterproof and fireproof laminate 14 having a urethane film 31, a primer 32, and a topcoat 33, but is not limited to this. The primer 32 and topcoat 33 may be omitted. That is, the roof structure 10 may include a urethane film 31 provided on the upper surface of the first roof panel 11, the upper surface of the second roof panel 12, and the upper surface of the waterproof and airtight tape 13. The urethane film 31 is formed by coating using a coating device such as a spray gun. Therefore, the urethane film 31 can fill the gap formed by the waterproof and airtight tape 13 and the metal outer shell 22 without any gaps. As the urethane film 31 is formed by coating, the surface (upper surface) of the urethane film 31 becomes a flat surface. The urethane film 31 formed by coating is adhered to the upper surface of the first roof panel 11, the upper surface of the second roof panel 12, and the upper surface of the waterproof and airtight tape 13.

[0081] In the above embodiment, the waterproof and fireproof laminate 14 has a three-layer structure consisting of a urethane film 31, a primer 32, and a topcoat 33, but is not limited to this. The primer 32 or the topcoat 33 may be omitted. If the primer 32 is omitted, the waterproof and fireproof laminate 14 has a two-layer structure consisting of a urethane film 31 and a topcoat 33. That is, the roof structure 10 may also include a waterproof and fireproof laminate 14 having a urethane film 31 provided on the upper surface of the first roof panel 11, the upper surface of the second roof panel 12, and the upper surface of the waterproof and airtight tape 13, and a topcoat 33 provided on the upper surface of the urethane film 31. If the topcoat 33 is omitted, the waterproof and fireproof laminate 14 has a two-layer structure consisting of a urethane film 31 and a primer 32. In other words, the roof structure 10 may also include a waterproof and fireproof laminate 14 having a urethane membrane 31 and a primer 32 provided on the lower surface of the urethane membrane 31, which adheres the urethane membrane 31 to the upper surface of the first roof panel 11, the upper surface of the second roof panel 12, and the upper surface of the waterproof and airtight tape 13. [Explanation of symbols]

[0082] 10. Roof structure 11. First roof panel 12. Second roof panel 13 Waterproof and airtight tape 14 Waterproof and fireproof laminate 15 Foam material 16 Fastening hardware 18 Main House 21 Insulation 22, 23 Metal shell 31 Urethane film 32 Primers 33 Top Coat 41 First mating section 42 recess 43 Step part 45 Second mating section 46 Convex part 47 Lid 51 Adhesive layer 52 Aluminum layer 55 Plate-shaped member 56. Securing part 57 screw holes

Claims

1. A fastening bracket for fastening a roof structure to a purlin, comprising a first roof panel having a first fitting portion and a second roof panel having a second fitting portion that fits with the first fitting portion, Each of the first roof panel and the second roof panel has an insulating material and two metal outer shells facing each other with respect to the insulating material. The first fitting portion is provided at one end of the first roof panel in the short direction, and has a recess that is recessed on the other side of the first roof panel in the short direction, and a stepped portion provided above the recess and on the other side of the first roof panel in the short direction, above the bottom surface of the recess. The second fitting portion is provided at the other end of the second roof panel in the short direction, and has a protrusion that projects to the other side of the second roof panel in the short direction and fits into the recess, and a cover portion provided above the protrusion with a gap between it and the protrusion, extending to the other side of the second roof panel in the short direction and covering the stepped portion. A plate-shaped member positioned above the recess and on one side of the stepped portion in the short direction of the first roof panel, A retaining portion is provided on the plate-shaped member and is engaged with the recess, A fastening fitting comprising one or more screw holes penetrating the plate-shaped member.

2. The fastening fitting according to claim 1, wherein the retaining portion is arranged along the longitudinal direction of the first roof panel, or along the short direction of the first roof panel.

3. The fastening fitting according to claim 1 or 2, A first roof panel having a first fitting portion is provided on multiple main buildings, A second roof panel is provided adjacent to the first roof panel on a plurality of purlins and has a second fitting portion that fits with the first fitting portion, A waterproof and airtight tape is attached to the upper surface of the first roof panel and the upper surface of the second roof panel so as to cover the gap between the first fitting portion and the second fitting portion. Equipped with, Each of the first roof panel and the second roof panel has an insulating material and two metal outer shells facing each other with respect to the insulating material. The first fitting portion is provided at one end of the first roof panel in the short direction, and has a recess that is recessed on the other side of the first roof panel in the short direction, and a stepped portion provided above the recess and on the other side of the first roof panel in the short direction, above the bottom surface of the recess. The second fitting portion is provided at the other end of the second roof panel in the short direction, and has a protrusion that projects to the other side of the second roof panel in the short direction and fits into the recess, and a cover portion provided above the protrusion with a gap between it and the protrusion, extending to the other side of the second roof panel in the short direction and covering the stepped portion. The waterproof and airtight tape has an adhesive layer adhered to the upper surface of the first roof panel and the upper surface of the second roof panel, and an aluminum layer provided on the adhesive layer. The fastening hardware is a roof structure for fastening the first roof panel to the purlin.

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