JP3191663B2 - Roofing structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roofing structure in which a roof tile is laid on a roof base surface via a heat insulating member.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 12, a roofing structure is known in which a roof tile (c) is laid on a roof base surface (a) via a heat insulating member (b). In the roofing structure, a heat insulating member (b) is placed and fixed on the roof base surface (b) with the upper surface of the field board (d) as a roof base surface (a), and the upper surface of the heat insulating member (b) has a stepped uneven top surface. (E), a plurality of flat roof tiles (c) are formed on the uneven surface (e), and the eave-side end is superimposed on the ridge-side end thereof, and is roofed along the stairs. Has been established. In this case, the heat insulation performance of the roof portion of the building is ensured by the heat insulating member (b).

[0003]

However, in the above-mentioned prior art, since the top surface of the base plate (d) is flat, the heat insulating member (b) is easily displaced and moved, and is not fixed securely. The positioning of the heat insulating member (b) is also difficult, and it takes time to mount and fix the heat insulating member (b). Such a problem becomes important not only at the time of roof construction, but also as a problem relating to productivity at the time of factory manufacturing when the roofing structure is manufactured in advance as a divided roof panel in a factory.

[0004] Further, as shown in FIG.
When a plurality of crosspieces (f) are fixed side by side to form a roof base (a), or as shown in Fig. 13 (b), an existing roof tile (g) is When the roof base surface (a) has an uneven shape, such as when the roof surface is a roof base surface (a), according to the above-mentioned conventional technique, the lower surface of the heat insulating member (b) is flat. Therefore, it is extremely difficult to mount and fix the heat insulating member (b) on the roof base surface (a) having an uneven shape. Since a gap is generated between the a) and the lower surface of the heat insulating member (b), a reliable fixing state cannot be obtained, and there is a possibility that the waterproof property may be hindered.

[0005] The present invention has been invented in order to solve all the problems in the above-mentioned conventional technique, that is, the problem can be appropriately dealt with when the roof base surface has an uneven shape, and Another object of the present invention is to provide a roofing structure in which a heat insulating member can be easily positioned and mounted on the roof base surface, and the heat insulating member is securely fixed so as not to move.

[0006]

According to a first aspect of the present invention, there is provided a roofing structure in which a roof tile is laid on a roof base surface via a heat insulating member. The lower surface is formed as an uneven lower surface that engages with the uneven shape of the roof base surface, and the upper surface of the heat insulating member engages with the uneven shape of the back surface of the roof tile to be laid. It is formed as an uneven top surface.

Therefore, in this case, the roof base surface has an uneven shape because the crosspieces are fixed side by side or the existing roof surface, and the uneven lower surface of the heat insulating member corresponds to the uneven shape. , The heat insulating member is easily positioned and mounted on the roof base surface and securely fixed so as not to move. In addition, since the uneven shape of the back surface of the roof tile is engaged with the uneven upper surface of the heat insulating member so as to correspond to each other, not only between the roof base surface and the heat insulating member, but also between the heat insulating member and the roof tile. Therefore, appropriate measures are taken to prevent the displacement movement and the generation of the gap and to ensure the heat insulation performance.

[0008] The roofing structure according to claim 1 of the present invention .
A plurality of crosspieces are juxtaposed and fixed on the base plate to form an uneven roof base surface, and a plurality of concave grooves with which the crosspieces are engaged are provided in parallel on the lower surface of the heat insulating member. The lower surface is formed as an uneven lower surface. Therefore,
In this case, in particular, when the roof base surface has a plurality of crosspieces fixed side-by-side on the base plate and has an uneven shape, the crosspieces can be utilized and appropriately handled, In other words, the groove on the lower surface of the unevenness of the heat insulating member is engaged so as to correspond to the crosspiece, and the heat insulating member is easily positioned on the roof base surface and securely mounted and fixed so as not to move.

In the roofing structure of the present invention, a flat roof tile is stepped on the ridge side end, and the eaves side end is overlapped, and the plurality of roof tiles are stair-shaped and have irregularities on the back surface. A plurality of steps are provided side by side on the upper surface of the heat insulating member so as to correspond to the shape, and the upper surface is formed as an uneven upper surface.
Therefore, in this case, especially when the flat roof tile is laid with its eaves end overlapped on its ridge end,
The plurality of roof tiles can be appropriately coped with by utilizing the uneven shape of the stair-like back surface of the plurality of roof tiles, that is, the plurality of roof tiles on the uneven top surface where the steps of the heat insulating member are juxtaposed. The roof tiles are each easily positioned on the same heat insulating member and securely laid so as not to move.

[0010] The roofing structure according to claim 2 of the present invention .
In addition , a drain groove in the direction of the eaves ridge is formed on the upper surface of the heat insulating member, and roof tiles are laid on both sides of the drain groove so that the side edge of the roof tile follows the drain groove. Therefore, in this case, in particular, rainwater flowing down from the gap between the side edges of the roof tile is received by the drainage groove on the heat insulating member and drained toward the eaves side, so that the rainwater flows to the back side of the roof tile. It does not permeate and diffuse or penetrate into the roof base surface, and the corrosion of the heat insulating member and the roof base surface on the back side of the roof tile is prevented.

[0011] The roofing structure according to claim 3 of the present invention .
Further , a gutter member for receiving rainwater flowing down from the eaves end of the drainage groove is provided along the eaves side edge of the heat insulating member. Therefore, in this case, in particular, as described above, the rainwater flowing down from the gap between the side edges of the roof tile is received by the drainage groove on the heat insulating member and drained toward the eaves side, and the drained rainwater Is received by a gutter member provided along the eaves-side edge of the heat insulating member, and is appropriately drained and removed.

In the roofing structure according to the fourth aspect of the present invention, a roof panel is formed by integrating a heat insulating member on the base plate, and a side edge of the roof tile projects at one side edge of the roof panel. And retreating the side edge of the roof tile at the other side edge to form a drainage ditch toward the eaves ridge below the retired portion, and projecting the roof tile from a roof panel adjacent to the drainage ditch. The roof panels are arranged side by side along the side edges.

Therefore, in this case, in particular, the roof panel can be easily constructed by arranging the roof panels formed integrally with the heat insulating member on the ground board, and furthermore, the roof panels arranged side by side can be constructed. The rainwater flowing down from the gap between the two is received by the drain and drained toward the eaves, so that the rainwater does not penetrate and diffuse to the back of the roof tiles and invade onto the baseboard. Roof panel corrosion is prevented.

[0014] In the roofing structure of the present invention , the drainage groove is formed on the upper surface of the heat insulating member. Therefore, in this case, in particular, since the drainage groove is formed on the upper surface of the heat insulating member and is integrated into the roof panel, the drainage groove can be easily provided at an appropriate position by juxtaposing the roof panels. Can be

The roofing structure of the present invention is characterized in that the existing roof surface on which the old roof tiles are laid is an uneven roof base surface. Therefore, in this case, in particular, when the roof base surface has an uneven shape on the existing roof surface on which the old roof tiles are laid, the uneven shape of the existing roof surface can be utilized to appropriately respond. That is, the uneven lower surface of the heat insulating member is engaged so as to correspond to the uneven shape of the existing roof surface, and the heat insulating member is easily positioned on the roof base surface and securely mounted so as not to move. Is fixed.

The roofing structure according to the present invention is characterized in that the upper surface of the heat insulating member is formed as an uneven upper surface corresponding to the uneven shape of the back surface of the corrugated roof tile. Therefore,
In this case, in particular, when a corrugated roof tile is laid, the corrugated uneven shape on the back surface of the corrugated roof tile can be appropriately used by utilizing the corrugated roof tile. The corrugated uneven shape of the back of the same wave plate-shaped roof tile is engaged so as to correspond to the uneven upper surface of the member, and the roof tile is easily positioned on the heat insulating member and securely laid so as not to move. Is done.

[0017]

DETAILED DESCRIPTION OF THE INVENTION Figure 1, 2, claim 1 of the present invention
The roofing structure of this embodiment is a roofing structure in which a roof tile 3 is laid on a roof base surface 1 via a heat insulating member 2, and the heat insulating member 2 is formed as an uneven lower surface 4 corresponding to the uneven shape of the roof base surface 1 and engaged with the same, and corresponds to the uneven shape of the rear surface of the roof tile 3 on which the upper surface of the heat insulating member 2 is laid. It is formed as an uneven upper surface 5 that engages with the lever.

In the roofing structure of the present embodiment, a plurality of crosspieces 7 are fixed side by side on a base plate 6 to form an uneven roof base surface 1, and the lower surface of the heat insulating member 2 A plurality of grooves 8 with which the crosspiece 7 is engaged are provided in parallel, and the lower surface is formed as the uneven lower surface 4. In addition, the flat roof tile 3 corresponds to the uneven shape of the stepped back surface of the plurality of roof tiles 3 laid on the ridge side edge of which is overlapped on the ridge side edge of the roof tile. A plurality of steps 9 are arranged in parallel on the upper surface of the heat insulating member 2, and the upper surface is formed as the uneven upper surface 5.

The field board 6 is a wooden board which is installed and fixed on the entire surface of the roof, and a plurality of wooden square bars 7 are nailed and fixed on the field board 6 so that the direction of the eaves is the longitudinal direction. The upper surface of the base plate 6 having the unevenness formed by fixing the crosspieces 7 side by side becomes the roof base surface 1. The heat insulating member 2 is formed of a synthetic resin foam into a board shape, and a plurality of square grooves 8 having substantially the same cross-sectional shape as the crosspiece 7 are provided on the lower surface thereof. The lower surface on which 8 are juxtaposed is the uneven lower surface 4. The heat insulating member 2 is fixed to the roof base surface 1 via an adhesive, and at this time, the uneven lower surface 4 of the heat insulating member 2 has an uneven roof base surface 1.
, That is, the plurality of concave grooves 8
, The positioning is easily performed, and furthermore, there is no mutual displacement, the bonding area is increased, and the fixing is firmly performed.

The upper surface of the heat insulating member 2 is provided with a plurality of step portions 9 in a direction orthogonal to the concave grooves 8. The upper surface of the heat insulating member 2 having the step portions 9 arranged side by side becomes the uneven upper surface 5. . On the uneven upper surface 5, a horizontally long flat rectangular roof tile 3 made of a cement-based inorganic plate is laid so that the ridge side edge thereof abuts against the step portion 9 and runs along. The height of the step 9 substantially matches the thickness of the roof tile 3, and the roof tile 3
The roof is stably laid so that the eaves-side end is superimposed on the ridge-side end and no gap is formed on the uneven upper surface 5 of the heat insulating member 2. In this way, the back surfaces of the plurality of roof tiles 3 that are overlapped in the eaves ridge direction have a step-like uneven shape, and the uneven upper surface 5 of the heat insulating member 2 is formed so as to correspond to the uneven shape. .

In the case where the interval between the eaves-side tip of the heat insulating member 2 and the step 9 closest to the eaves is made equal to the interval pitch between the steps 9, as shown in FIGS. Roof tiles 3 having a width corresponding to the distance between the eaves-side end of the heat insulating member 2 and the most eaves-side step 9 are required, and the other roof tiles 3 sequentially laid on the roof tiles 3 As shown in FIG. 3, the heat insulating member 2 is formed in a shape in which the step 9 closest to the eaves side is omitted from the eaves side end, as shown in FIG. By forming the member 2, the roof tiles 3 having the same width can be laid to the eaves-side end. Further, the roof tile 3 is fixed to the uneven upper surface 5 of the heat insulating member 2 via an adhesive, but it may be fixed by nailing.

Accordingly, in the roofing structure of this embodiment, the roof base surface 1 is formed with the crosspieces 7 arranged side by side and fixed in an uneven shape, and the uneven lower surface 4 of the heat insulating member 2 corresponds to the uneven shape. As a result, the heat insulating member 2 is easily positioned and mounted on the roof base surface 1 and securely fixed so as not to move. In addition, since the uneven shape of the back surface of the roof tile 3 is engaged with the uneven upper surface 5 of the heat insulating member 2 so as to correspond thereto, not only between the roof base surface 1 and the heat insulating member 2, but also between the heat insulating member 2 and the roof. Appropriate measures are taken such that mutual displacement and generation of a gap between the roof tile 3 and the like are prevented, and heat insulation performance is ensured.

In the roofing structure of this embodiment, when the roof base surface 1 has a plurality of crosspieces 7 fixed side by side on a base plate 6 and has an uneven shape, Is used and can respond appropriately, that is,
The groove 8 of the uneven lower surface 4 of the heat insulating member 2 is engaged with the cross member 7 so as to correspond thereto, and the heat insulating member 2 is easily positioned on the roof base surface 1 and securely mounted so as not to move. Fixed. In addition, when the flat roof tile 3 is laid with its eaves end overlapped on the ridge end, the stepped back surface irregularities of the plurality of roof tiles 3 are utilized. That is, a plurality of the roof tiles 3 can be provided on the uneven upper surface 5 where the step portions 9 of the heat insulating member 2 are juxtaposed.
The roof tiles 3 are each easily positioned on the heat insulating member 2 and securely laid so as not to be displaced.

FIGS. 4 and 5 show an embodiment corresponding to claims 1 and 2 of the present invention. In the roofing structure according to this embodiment, a drain groove 10 is provided on the upper surface of the heat insulating member 2 in the direction of the eaves ridge. The roof tiles 3 are laid on both sides of the drain groove 10 so that the side edge of the roof tile 3 is along the drain groove 10. Therefore,
In this case, in particular, rainwater flowing down from the gap between the side edges of the roof tile 3 is received by the drainage grooves 10 on the heat insulating member 2 and drained toward the eaves side. It does not permeate and diffuse to the back side or invade onto the roof base surface 1, so that corrosion of the heat insulating member 2 and the roof base surface 1 on the back side of the roof tile 3 is prevented, and the heat insulation performance is hindered. I will not come.

Also, in this case, since a plurality of flat roof tiles 3 are shingled so that their side edges are aligned in a straight line in the direction of the eaves ridge, a gap between the side edges of the roof tiles 3 is provided. There is no need to dispose the roof tiles 3 under the roof, so that the overlapping portion can be made smaller and the exposed portion can be made larger so that roofing can be performed efficiently. Moreover, at that time, there is no need to interpose a separate draining sheet below the gap between the side edges of the roof tile 3 as conventionally performed, so that the construction is easy and the roof tile 3 The roof is stably laid so that no gap is formed on the uneven upper surface 5 of the heat insulating member 2 having elasticity, and the stepping crack is prevented.

The roof tile 3 is fixed to the uneven upper surface 5 of the heat insulating member 2 by a nail 11. In this case, the nail 11 is driven into the beam 7 via the heat insulating member 2 and has a high fixing strength. Is obtained. This configuration can be adopted in the above embodiment, and by doing so, the same operation and effect can be obtained in the above embodiment. The other configuration is the same as that of the above embodiment, and the same operation and effect as those of the above embodiment can be obtained.

FIGS. 6, 7 and 8 show the first embodiment of the present invention.
2 and 3 show one embodiment corresponding to the roofing structure. In the roofing structure of this embodiment, a gutter member 12 for receiving rainwater flowing down from an eaves-side end of the drainage groove 10 is provided along an eaves-side edge of the heat insulating member 2. Provided. Therefore, in this case, in particular, as in the above embodiment, the rainwater flowing down from the gap between the side edges of the roof tile 3 is received by the drainage grooves 10 on the heat insulating member 2 and drained toward the eaves side, The drained rainwater is received by a gutter member 12 provided along the eave-side edge of the heat insulating member 2 and is appropriately drained and removed.

In this case, the eaves end of the base plate 6 protrudes forward from the eaves edge of the heat insulating member 2, and the nose plate 13 is erected and fixed to the eaves end of the base plate 6. A groove-like recess 14 is formed between the nose plate 13 and the eave-side edge of the heat insulating member 2, and the gutter member 12 is fitted into the groove-like recess 14 and is stably installed. I have. A groove member 15 is fitted to the eave-side end of the drainage groove 10 so that rainwater flowing down from the eaves-side end of the drainage groove 10 is guided into the gutter member 12 and reliably received. Further, since the roof tile 3 closest to the eaves is laid so as to cover the upper part of the groove-shaped recess 14, the appearance of the eaves can be finished well and the gutter member 12 housed in the recess 14 can be obtained.
Is prevented from becoming damaged, making it ideal for snowy areas,
Intrusion of fallen leaves and the like into the gutter member 12 is also prevented. In addition,
Otherwise, the configuration is the same as in the above embodiment, and the same operation and effect as in the above embodiment are exerted.

FIG. 9, FIG. 10, according to claim 1 of the present invention,
3 and 4, there is shown an embodiment corresponding to FIGS. 3 and 4. In the roofing structure of this embodiment, a heat insulating member 2 is integrated on a base plate 6 to form a roof panel 16, and one side edge of the roof panel 16 is formed. The side edge 17a of the roof tile 3 is protruded at the portion, and the side edge 17b of the roof tile 3 is retreated at the other side edge to form the drainage groove 10 in the eaves ridge direction below the retreated portion. The roof panel 16 is arranged side by side along the protruding side edge 17a of the roof tile 3 of the roof panel 16 adjacent to the drain groove 10.

Therefore, in this case, in particular,
A roof can be easily constructed by arranging roof panels 16 integrally formed with the heat insulating member 2 thereon, and rainwater flowing down from a gap between the roof panels 16 arranged side by side can be drained. Because it is received at 10 and drained toward the eaves side,
The rainwater does not permeate and diffuse to the back side of the roof tile 3 or invade onto the base plate 6, so that the corrosion of the roof panel 16 is prevented. Also, in this case, since the drain groove 10 is formed on the upper surface of the two heat insulating parts and is integrated into the roof panel 16, the drain groove 10 is placed at an appropriate position by juxtaposing the roof panel 16. It is easily provided.

In this case, since the heat insulating member 2 is interposed between the base plate 6 and the roof tile 3, the frame material conventionally required for forming the roof panel becomes unnecessary. Thin and thick ones can be adopted to reduce the weight, and the heat insulating member 2 and the plurality of crosspieces 7 in the eaves ridge direction prevent the roof panel 16 from being bent in the eaves ridge direction. By arranging the roof panels 16 side by side on the main house 18, the heat insulation performance of the roof can be reliably obtained.

In this case, the uneven upper surface 5 of the heat insulating member 2
The work of laying the roof tile 3 may be performed at a construction site or may be performed in a factory in advance to simplify the construction. In other respects, the configuration is the same as that of the embodiment shown in FIGS. 4 and 5, and the same operation and effect as in the embodiment are exerted.

FIG. 11 shows an embodiment corresponding to claim 1 of the present invention. In the roofing structure of this embodiment,
The existing roof surface on which the old roof tile 31 is laid is a roof base surface 1 having an uneven shape. Therefore, in this case, in particular, when the roof base surface 1 has an uneven shape on the existing roof surface on which the old roof tile 31 is laid, the uneven shape of the existing roof surface is utilized to appropriately cope. That can be
That is, the uneven lower surface 4 of the heat insulating member 2 is fitted so as to correspond to the uneven shape of the existing roof surface, and the heat insulating member 2 is easily positioned on the roof base surface 1 and securely mounted so as not to move. It is fixed and can be easily handled when the roof is replaced by extension or renovation, while leaving the existing roof surface.

In this case, the upper surface of the heat insulating member 2 is formed as an uneven upper surface 5 corresponding to the uneven shape of the back surface of the corrugated roof tile 3. Therefore, in this case, especially when the corrugated roof tile 3 is laid, the corrugated uneven shape on the back surface of the corrugated roof tile 3 can be utilized to appropriately cope. That is, the corrugated uneven shape of the back surface of the roof tile 3 of the same wave plate is engaged with the upper surface 5 of the unevenness of the heat insulating member 2 so that the roof tile 3 is easily positioned on the heat insulating member 2. Roofing is ensured so that it does not move. Except for this, the configuration is substantially the same as that of the embodiment shown in FIGS. 1 and 2, and the operation and effect according to claim 1 are exerted as in the embodiment.

[0035]

As described above, in the roofing structure according to the first aspect of the present invention, the roof base surface has an uneven shape, but the heat insulating member is easily positioned and mounted on the roof base surface. It is securely fixed so as not to be displaced and moves, and furthermore, not only between the roof base surface and the heat insulating member, but also between the heat insulating member and the roof tile, mutual shift movement and generation of a gap are prevented. Appropriate measures are taken to ensure the heat insulation performance.

Further, in the roofing structure according to the first aspect of the present invention, particularly, when the roof base surface has a plurality of crosspieces fixed side by side on a base plate and has an uneven shape. Appropriate responses can be made by utilizing the crosspieces.

In the roofing structure of the present invention , in particular, when a flat roof tile is laid with its eaves end overlapped on the ridge end thereof, the plurality of roof tiles are provided. An appropriate response can be made by utilizing the uneven shape of the back surface which is stepped.

Further, in the roofing structure according to the second aspect of the present invention, in particular, rainwater flowing down from the gap between the side edges of the roof tile is received by the drainage groove on the heat insulating member and goes to the eaves side. Rainwater does not permeate and diffuse to the back of the roof tiles or infiltrate into the roof basement, preventing corrosion of the heat-insulating members and roof basement behind the roof tiles. .

In the roofing structure according to the third aspect of the present invention, as described above, the rainwater flowing down from the gap between the side edges of the roof tile is received by the drain grooves on the heat insulating member. Rainwater is drained toward the eaves side, and the drained rainwater is received by a gutter member provided along the eaves-side edge of the heat insulating member, and is appropriately drained and removed.

In the roofing structure according to the fourth aspect of the present invention, in particular, the roof can be easily constructed by arranging the roof panels side by side, and furthermore, the gap between the roof panels arranged side by side can be obtained. Rainwater flowing down from the roof is received by the drain and drained to the eaves side, so that the rainwater does not penetrate and diffuse to the back side of the roof tiles and invade onto the baseboard Is prevented.

In the roofing structure of the present invention, in particular, in the above case, the drainage groove is formed on the upper surface of the heat insulating member and is integrally incorporated into the roof panel, and the roof panels are juxtaposed. The drain is easily provided in an appropriate position.

In the roofing structure of the present invention, in particular, when the roof base surface is uneven on the existing roof surface on which the old roof tiles are laid, the uneven shape of the existing roof surface is changed. Utilize it and respond appropriately.

In the roofing structure of the present invention, especially when corrugated roof tiles are laid, the corrugated uneven shape on the back surface of the corrugated roof tiles is appropriately utilized. Can respond.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a roofing structure according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the roofing structure.

FIG. 3 is a sectional view showing an improved form of the roofing structure.

FIG. 4 is a perspective view showing a roofing structure according to another embodiment.

FIG. 5 is a cross-sectional view of the roofing structure.

FIG. 6 is an exploded perspective view showing a roofing structure according to still another embodiment.

FIG. 7 is a plan view of the roofing structure.

FIG. 8 is a cross-sectional view of the roofing structure.

FIG. 9 is a perspective view showing a roof panel in a roofing structure according to still another embodiment.

FIG. 10 is an exploded sectional view of the roofing structure.

FIG. 11 is an exploded perspective view showing a roofing structure according to still another embodiment.

FIG. 12 is a cross-sectional view showing a conventional roofing structure.

FIGS. 13A and 13B are perspective views illustrating different roof base surfaces in the same conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roof base surface 2 Insulation member 3 Roof tile 4 Irregular lower surface 5 Irregular upper surface 6 Field board 7 Crosspiece 8 Groove 9 Stepped section 10 Drainage groove 12 Gutter member 16 Roof panel 31 Old roof tile

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E04D 12/00 E04D 1/28 E04D 3/00 E04B 7/02

Claims (4)

(57) [Claims] A plurality of crosspieces are fixed side by side on a base plate.
In addition to forming an uneven roof base surface,
A plurality of grooves in which the crosspieces are engaged are provided side by side on the lower surface of the
A roof with roof tiles with the lower surface formed as an uneven lower surface
A roofing structure, wherein the lower surface of the heat insulating member is formed as an uneven lower surface that engages with the uneven shape of the roof base surface, and the uneven surface of the roof tile on which the upper surface of the heat insulating member is laid. A roofing structure formed as an uneven upper surface that engages with the shape. 2. A drainage ditch in the direction of the eaves ridge is formed on the upper surface of the heat insulating member, and roof tiles are laid on both sides of the drainage ditch so that a side edge of the roof tile is along the drainage ditch. Claim 1
On- roof structure. 3. The roofing structure according to claim 2, wherein a gutter member for receiving rainwater flowing down from the eave-side end of the drainage groove is provided along the eave-side edge of the heat insulating member. 4. A roof panel is formed by integrating a heat insulating member on a field board, a roof edge is protruded at one side edge of the roof panel, and a roof tile is protruded at the other side edge. Of the roof tiles is formed by retreating the side edge of the roof panel in the direction of the eaves ridge below the retired portion, and along the protruding side edge of the roof tile of the roof panel adjacent to the drainage groove. The roofing structure according to claim 1 , wherein the roofing structure is arranged side by side.