JPH10280619A - Roof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof easy to construct at a low cost by mounting a ridge member across a surface, where a stepped roof material, different in thickness, and a roof material with a built-in solar battery are placed, thus to reduce the number of parts. SOLUTION: A roof 1 has a stepped roof material 2 placed on one face across its ridge line, a roof material 3 with a built-in solar battery placed on the other face and a ridge member 4 mounted along the ridge line to stride across the stepped roof surface and the placement surface of the roof material with the built-in solar battery. On the upper face at the end on the ridge line side of the ridge side stepped roof material 2c, a supporting step 17 which has a height almost equivalent to a difference in height between the stepped roof material 2 and the placement surface of the roof material with the built-in solar battery and onto which the lower edge on one side of the ridge member 4 is placed and fixed is integrally formed along the longitudinal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof in which a solar cell built-in roof material for collecting solar energy is partially laid.

[0002]

2. Description of the Related Art A roof having different slopes across a ridge line such as a mansard roof or a gable roof is constructed by laying a normal roof material such as a metal roof material on one surface and a solar cell built-in roof on the other surface. Materials may be laid. However, the roofing material with a built-in solar cell is thicker than a normal roofing material. there were.

[0003] Therefore, a separate raising member is attached to the upper surface of the ridge side end of the metal roof plate laid on one surface with the ridge line interposed therebetween, whereby the photovoltaic element built-in roof laid on the other surface is provided. Japanese Patent Application Laid-Open No. 2-96046 discloses a roof in which a difference in height from a roof member is adjusted so that a ridge member can be laid between upper surfaces of a metal roof plate and a roof member with a built-in photovoltaic element. However, this one has a large number of parts, so the work on the unstable roof increases and the construction efficiency walks,
The disadvantage is that the danger increases.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a ridge member can be mounted over a surface on which tiered roofing materials having different thicknesses and roofing materials with built-in solar cells are laid, and the number of parts can be reduced. Therefore, an object of the present invention is to provide a roof which is easy to construct and inexpensive.

[0005]

According to the roof of the present invention, a staircase roofing material is laid on one side of the ridge, and a solar cell built-in roofing material is laid on the other side, and the roof is mounted along the ridgeline. The ridge member is constructed by straddling the shingled roof surface and the solar cell built-in roof material laying surface, and the ridge line side end of the ridge side shingled roof material laid closest to the ridge line is provided on the upper surface of the ridge line side surface. Having a height substantially equivalent to the difference between the height of the solar cell built-in roof material laying surface and the supporting step on which the lower edge of one side of the ridge member is placed and fixed is formed integrally along the longitudinal direction. I do.

[0006] Just by mounting the ridge side roofing material, the ridge member mounting positions of the solar cell built-in roofing material laying surface and the stepping roof surface become the same height. The supporting step blocks rainwater that is blown up on the roofing material and prevents leakage from the ridgeline.

[0007] Further, in a roof in which a plurality of stepped roofing materials are arranged side by side along the ridge line direction, the joint outer surface of the supporting step portion of the adjacent building side stepped roofing material can be covered with a connection cover. In this way, the joint of the supporting step portion is concealed, the appearance is good, and water leakage from this joint is prevented.

Further, a locking groove which opens to the ridge line side is formed above the supporting step portion, and an engaging piece which projects downward and protrudes from both lower edges of the ridge member. The other engagement piece may be placed and fixed on the solar cell built-in roofing material laying surface while engaging with the stop groove. Thereby, the ridge member is easily and stably joined to the ridge side roofing material, and by adjusting the engagement depth of one of the engagement pieces with the locking groove, the slope of the roofing material is adjusted. Dimensional errors along the direction are absorbed. In addition, the engagement piece comes into line contact with the supporting step portion, thereby responding to a change in roof slope.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A roof 1 shown in FIG. 2 is a gable roof, in which a staircase roofing material 2 is laid on one surface across a ridgeline, and a solar cell built-in roofing material 3 is provided on the other surface. The ridge member 4 laid and mounted along the ridgeline is laid across the step roof surface and the solar cell built-in roof material laying surface. In addition, a keraba member 6 for a staircase roof is attached to each of the two wives on one surface, and a keraba member 7 for a lighting roof is attached to each of the two wives on the other surface. Furthermore, the solar cell built-in roofing material 3 adjacent in the width direction is connected by an intermediate connecting member 11,
The ridge members 4 adjacent in the longitudinal direction are joined by a ridge connection member 8, and ridge end members 9 are attached to both ends of the ridge line.

[0010] The step roofing material 2 is a long, horizontally long material made of metal or synthetic resin. The stepping roof material 2a laid closest to the eaves and the intermediate step roofing material are used. 2b, and a ridge-side roofing material 2c laid closest to the ridgeline. As shown in FIG. 1 and FIG.
A heat insulating material 10 is mounted on the back surface of. Further, as shown in FIG. 2, a plurality of rows (two rows in the example shown in the figure) of the step roofing materials 2 are arranged side by side along the ridgeline direction, and the stepping roof materials 2 adjacent to each other in this direction are: It is connected by the roof material connecting member 5.

As shown in FIG. 3, the front end of the ridge-side step roofing material 2c is bent to the rear surface to form a front hanging portion 12, and engages with the lower intermediate step roofing material 2b at the lower front portion near the rear surface. An engagement key 13 is formed. At the rear end of the ridge-side step roofing material 2c, a fixing piece 14 extends, and a plurality of fixing holes 15 are formed in the fixing piece 14 at appropriate intervals. Of these fixing holes 15, the central one is a circular hole and the ones on both sides are long holes. In addition, a long fixing notch 15 ′ is formed laterally at both ends of the fixing piece 14.

A substantially arc-shaped concave connecting portion 16 is formed near the rear end of the ridge-side step roofing material 2c, and is bent back forward.
A support step 17 for supporting the lower edge of one side of the ridge member 4 is integrally provided slightly in front of the support step. The supporting step 17 includes an inverted L-shaped upright wall 18, a waterproof wall 19 erected at the front end thereof, and an overhang portion 20 projecting from the rear surface of the waterproof wall 19, and the lower end of the waterproof wall 19 has an upright wall. A hook portion 21 is formed to project slightly below the front end portion 18. The height of the supporting step 17, that is, the height up to the upper surface of the overhanging portion 20, is determined by the upper surface of the intermediate connecting member 11 which receives the lower edge of the ridge member 4 on the solar cell built-in roofing material laying surface, And the height difference is almost equivalent.

Further, a cover receiving piece 22 protrudes rearward from an upper end of the waterproof wall 19 above the supporting step portion 17,
A locking groove 23 that opens toward the ridge line is formed between the cover receiving piece 22 and the overhang portion 20. Also, the cover receiving piece 22
The rear end is bent back in a substantially arc shape in front of the surface to form an arc-shaped groove portion 24.

As shown in FIG. 4, the ridge side roofing material 2c is a roofing material mounting bracket 2 having bolts 25 planted on the upper surface thereof.
6 is fixed to the roof base, the bolt 25 is inserted into the fixing notch 15 ′, the nut 32 is screwed into the upper end thereof, and the screw 42 (see FIG. 1) is screwed into the roof base through the fixing hole 15. Fixed. As a result, when the temperature changes, the ridge-side step roof material 2c can expand and contract right and left around the center fixing hole 15 without distortion. Note that the other step roof materials 2 are similarly fixed.

As shown in FIG. 5, the roof material connecting member 5
It is composed of a discarded plate 27, a cap 28, and a waterproof plate 29 having a corrugated cross section superimposed on the lower surface of the cap. The sacrificial plate 27 is overlapped between the side lower surfaces of the adjacent step roof materials 2, and FIG.
As shown in FIG. In addition, a water return wall 31 is erected at the rear end of the slat 27 attached to the side end of the ridge side roofing material 2c. The cap 28 is erected between the side upper surfaces of the adjacent step roof materials 2 and, as shown in FIG.
The rotation bending portion 33 is formed. Further, the front end of the cap 28 is bent to the back side to form a curved piece 34, and a locking ridge 35 is formed on the front and back side. Then, a waterproof plate 29 is superposed on the back surface of the cap 28 so that the groove thereof extends along the gradient direction.

As shown in FIG. 1, a connection cover 36 covers the outer surface of the joint of the supporting step portion 17 of the adjacent building-side step roofing material 2c. As shown in FIGS. 8 to 10, the connection cover 36 has a waterproof wall 19 and a key-shaped band portion 37 superposed on the outer surface of the cover receiving piece 22, and a ridge-side step roofing material 2 at the rear end thereof.
A bulging ridge 38 that engages with the arc-shaped groove 24 of c is formed along the longitudinal direction. Cuts 39 are respectively formed near both sides of the ridge 38, and a cutout 40 is formed along the longitudinal direction at the lower end of the rear surface of the ridge 38. Further, the lower end of the connection cover 36 is bent to the rear surface side to form the engagement hook 41.

The adjacent ridge-side roofing material 2c is connected as follows. As shown in FIG. 12, the building-side step roofing material 2c
At the connection side end of the support step 17 and the cover receiving piece 2
2 are excised. Then, one side of the sacrificial plate 27 is superimposed on the lower surface of the side of the one building-side step roofing material 2c, and the supporting step 17 is formed.
The connection cover 36 is slidably engaged with the outer surface of the connection member. At this time, the ridge 38 on the connection cover 36 is
c and the engaging hook 41
Is locked to the hook 21. Also, the concave connecting portion 16
By engaging the rotation bending portion 33 with the
8 is slidably attached to the surface of the other building-side step roof material 2c so as to be rotatable up and down.

Next, as shown in FIG. 13, the side end of the other building-side step roofing material 2c is placed on the upper surface of the other side of the discarded plate 27.
One side of the ridge side roofing material 2c is polymerized at an interval from the side edge of the roofing material 2c.
Is slid in the direction of arrow a. When the cap 28 is moved to the regular position, the front end thereof is pushed down in the direction of the back along the arrow b, and the locking ridge 35 is snap-engaged with the lower end of the front hanging portion 12 of the ridge-side step roofing material 2c. As a result, the side end portions of the adjacent ridge-side step roofing material 2c are joined without being hindered by expansion and contraction due to temperature change, and the rainwater that has entered from the joint portion is drained toward the eaves by the waste plate 27. . In addition, gaps formed on the upper and lower surfaces of the waterproof plate 29 due to the waves block water leakage due to capillary action.

Next, the connection cover 36 is slid in the direction of the arrow c, as shown in FIG.
11C, the outer surface of the joint of the supporting step 17 is covered, and as shown in FIG. 11, the portion of the connecting cover 36 sandwiched by the cuts 39 of the bulging projections 38 is pushed backward. At this time, the ridge 38
Since the cutout portion 40 is formed at the base portion, the ridge 38 can be relatively easily deformed by pushing the ridge 38 by hand. Thereby, the side end of the pushed-in intermediate portion of the bulging protrusion 38 is formed into the arc-shaped groove portion 24 of the left and right ridge-side step roofing material 2c.
, The movement of the connection cover 36 is restricted. In addition to preventing water leakage from the joint of the support step 17, the support step 17 and the connection cover 36 block rainwater that blows up on the surface of the ridge-side roofing material 2c, and water is flooded from the ridgeline portion of the roof 1. To prevent

As shown in FIGS. 1 and 15, the ridge member 4 includes, in cross section, left and right ridge side members 43 and a ridge crown 44 provided between the upper ends of the ridge side members 43. The ridge side surface member 43 is provided with a plurality of ventilation holes, and the engagement piece 4 that curves downward and outward from the lower end thereof.
5 is overhanging. In addition, the engagement piece 45 placed on the roofing material laying surface with built-in solar cells can be slightly shorter than the engagement piece 45 placed on the stepped roof surface. A bolt mounting groove 46 is provided along the longitudinal direction at the top of the back of the crown 44, and a nut operating notch 47 is formed at the top of the crown 44 at the connection end of the adjacent ridge member 4 as shown in FIG. 16. Is formed.

In order to mount the ridge member 4, as shown in FIG. 15, one engagement piece 45 is placed on the upper surface of the overhang portion 20 of the ridge side roofing material 2c and inserted into the locking groove 23. After that, the other engagement piece 45 is placed on the upper surface of the intermediate connection member 11 on the side of the roof material 3 with a built-in solar cell. In addition, building member 4
Near the connection end of the roof 1
And the upper end thereof is inserted into the bolt mounting groove 46 material. Then, through the nut operating notch 47,
As shown in FIG. 1, in the bolt mounting groove 46,
The washer 49 and the nut 50 are attached to the upper end of the attachment bolt 48, and the ridge member 4 is fixed.

Next, as shown in FIG. 16, another ridge member 4 having a ridge connection member 8 slidably fitted to the outer surface is arranged next to the fixed ridge member 4 at a slight interval. Then, after being fixed by the mounting bolts 48 in the same manner, the ridge connection member 8 is slid to close the seam of the adjacent ridge member 4 and the notch 47 for nut operation. When the position of the ridge connection member 8 is determined, as shown in FIGS.
The mounting tool 51 is placed on the upper surface of the ridge member 1, and the hook 60 formed on the ridge side end of the mounting tool 51 is hooked on the other engagement piece 45 of the ridge member 4. Note that a bolt insertion groove 61 parallel to the hook 60 is formed on the upper surface of the attachment 51.

Next, the fixing tool 52 is placed over the mounting tool 51, and the rising piece 63 erected on the ridge side end of the fixing tool 52 is engaged with the lower edge of the ridge connection member 8, thereby fixing the fixing tool 52. The lower ends of the side walls 62 formed on both sides of the lower surface of the
On both sides. Then, the bolt 53 penetrates through the side wall 62 and the bolt insertion groove 61, and a nut 64 is attached to the tip thereof.
And the fixing tool 52 and the mounting tool 51 are joined.
Thereby, the ridge member 4, the ridge connection member 8, and the intermediate portion connection member 11 are firmly joined, and the sliding of the ridge connection member 8 is restricted.

Since the engaging piece 45 of the ridge member 4 is curved convexly downward, the back surface thereof is in line contact with the overhang portion 20 of the ridge side roofing material 2c and the upper surface of the intermediate connecting member 11, respectively. For this reason, in the case of the standard gradient as shown in FIG. 1, the case of the steep gradient as shown in FIG. 19, and the case of the gentle gradient as shown in FIG. It can be placed and fixed on the stair roof material 2c and the intermediate connection member 11.

Also, since the one engaging piece 45 is only inserted into the locking groove 23 of the ridge-side roofing material 2c, it is not necessary to fix it with a fastener such as a bolt and the construction is easy. Or, because such a stopper does not appear in the appearance, the appearance is good. Moreover, by changing the insertion length of the engagement piece 45 into the locking groove 23, it is possible to absorb an error between the finishing length in the gradient direction by the step roofing material 2 and the length of the roof base. For example, when there is no deviation in the mounting position and no dimensional error, and the finished length of the step roof material 2 exactly corresponds to the length of the roof foundation, as shown in FIGS. Reaches a substantially central portion of the locking groove 23, and the ridge member 4 and the ridge-side step roof material 2c are overlapped with a standard overlapping width.

When the finishing length is shorter than the length of the roof base, the tip of the engaging piece 45 is engaged near the entrance of the locking groove 23 as shown in FIGS. The overlap width between the ridge member 4 and the ridge side roofing material 2c is reduced. Conversely, if the finishing length is longer than the length of the roof base,
As shown in FIGS. 25 and 26, the tip of the engagement piece 45 is inserted into the depth of the locking groove 23, and the overlapping width of the ridge member 4 and the ridge-side step roof material 2 c increases.

The ridge end member 9 is shown in FIGS.
As shown in FIG. 0, a ridge member fitting piece 55 protrudes from the rear surface of the ridge end wall 54 along the upper peripheral edge thereof. In addition, along the lower peripheral edge of the back surface of the ridge end face wall 54, a keraba member engaging piece 65 having a width smaller than the ridge member fitting piece 55 is continuously provided to the ridge member fitting piece 55. Note that the bottom of the fluff member engaging piece 65 protrudes slightly longer than the side part. Further, an insertion notch 56 is formed at the lower edge of the ridge member fitting piece 55, extends inward at the lower inner surface of the ridge member fitting piece 55, the tip thereof is bent downward, and the lower end thereof is bent outward. A fixture engaging portion 59 having a substantially U-shaped cross section is formed. The lower end of the fixture engaging portion 59 has a height facing the inside of the insertion notch 55, and the locking descending portion 66 is formed between the upper edge of the insertion notch 56 and the base of the fixture engaging portion 59. I have.

A corrugated plate locking ridge 57 is formed on the inner surface of the side of the ridge member fitting piece 55 at a slight distance from the top.
A waterproof corrugated sheet 58 as shown in FIG. 28 is superimposed on the rear surface of the ridge end member 9 as shown in FIG.
Is locked. The waterproof corrugated sheet 58 is desirably formed of a material having some flexibility, and is mounted so that each peak and valley cross the ridge line of the roof 1.

The ridge end member 9 is mounted as follows. As shown in FIG. 31, the ridge member fitting piece 55 of the ridge end member 9 is put on the end outer surface of the ridge member 4, and the bottom projecting end of the keraba member engagement piece 65 is covered with the keraba member 6 for the step roof and the lighting. Hook the lower end of the roof keraba member 7. Next, a fixture 51 similar to that for fixing the ridge member 4 is placed on the upper surfaces of the keraba member 6 for the step roof and the keraba member 7 for the daylighting roof, and FIG.
As shown in FIG. 3, the hook 60 is inserted from the insertion notch 55 and locked to the fixture engaging portion 59.

Next, as shown in FIG.
33, the fixture 52 is put on the upper part 1 and the rising piece 63 is inserted from the insertion notch 55, and is hooked on the inner surface of the locking descending part 66 as shown in FIG. And the side wall 6 of the fixture 52
2 are engaged with both side ends of the roof roof keraba member 6 and the daylight roof keraba member 7, and the bolt 53 and the nut 64 are engaged.
Thus, the fixing tool 52 and the mounting tool 51 are joined.

As a result, the ridge end member 9 is firmly fixed in a state of being fitted to the end of the ridge member 4, and there is no fear of moving back and forth, left and right, up and down, or coming off the ridge end. Also,
The waterproof corrugated sheet 58 mounted on the backside of the top of the ridge end member 9 forms a plurality of gaps between the ridge end member 9 and the upper surface of the ridge cap 44 for blocking the capillary phenomenon, thereby invading rainwater. The appearance is beautiful and the construction is easy.

[0032]

According to the structure of the first aspect, even if the solar cell built-in roofing material and the staircase roofing material having different thicknesses are laid on both sides of the ridge line, the difference in the thickness is adjusted by the supporting step portion. By doing so, the ridge member can be straddled without difficulty. In addition, the supporting step blocks rainwater blown up on the step roof material, thereby preventing water leakage from the ridge line portion. Furthermore, the number of components is reduced as compared with the case where a separate member for raising is placed on the roofing material, so that the labor and manufacturing cost of the construction are reduced, and the member for raising and the roofing roof are reduced. There is no danger of rainwater entering through gaps between the materials.

According to the second aspect of the present invention, the joint of the supporting step portion is concealed, the appearance is good, and water leakage from the joint is prevented. According to the configuration of the third aspect, the ridge member is simply and stably joined to the ridge side roofing material only by inserting the engagement piece into the locking groove, and the ridge member is fastened with the stopper. Not only does it save the trouble of fixing the head, but the appearance is good because the fasteners do not appear on the exterior. In addition, by adjusting the engagement depth of the engagement piece with the locking groove, it is possible to absorb the error between the finishing length in the gradient direction and the roof base length due to the mounting error of the roofing material or the dimensional deviation. it can. Furthermore, since the back surface of the engagement piece is in line contact with the upper surface of the supporting step, it is possible to cope with a change in the roof slope.

[Brief description of the drawings]

FIG. 1 is a sectional view of a ridge portion of a roof showing an embodiment of the present invention.

FIG. 2 is an overall perspective view of the same.

FIG. 3 is a perspective view of a building-side step roof material.

FIG. 4 is a cross-sectional view of a fixing portion of the adjacent building-side step roofing material.

FIG. 5 is a cross-sectional view of a connection portion between adjacent step roof materials.

[Fig. 6] Barefoot diagram of a discarded plate

FIG. 7 is a perspective view of a cap and a waterproof plate.

FIG. 8 is a rear perspective view of the connection cover.

FIG. 9 is an end view of the connection cover.

FIG. 10 is a front perspective view of a connection cover.

FIG. 11 is a front perspective view of the connection cover after deformation.

FIG. 12 is a perspective view showing the first stage of the joining process of the adjacent building-side step roof material.

FIG. 13 is a perspective view showing a second stage of the joining process of the adjacent building-side step roof materials.

FIG. 14 is a perspective view showing a third step of the joining process of the adjacent building-side step roof materials.

FIG. 15 is a sectional view of a ridge part in the process of mounting the ridge member.

FIG. 16 is a perspective view showing a first stage of a joining process of adjacent ridge members.

FIG. 17 is a perspective view showing a second stage of the joining process of the adjacent ridge members.

FIG. 18 is a perspective view showing a third stage of the joining process of the adjacent ridge members.

FIG. 19 is a sectional view of a ridge portion of a steep roof.

FIG. 20 is a sectional view of a ridge part of a gentle slope roof.

FIG. 21 is a partial cross-sectional view of a roof having a standard finish length.

FIG. 22 is a partially enlarged view of FIG. 21;

FIG. 23 is a partial sectional view of a roof with a short finishing length.

FIG. 24 is a partially enlarged view of FIG. 23;

FIG. 25 is a partial cross-sectional view of a roof with a long finishing length.

26 is a partially enlarged view of FIG. 25.

FIG. 27 is a rear perspective view of a ridge end member.

FIG. 28 is a perspective view of a waterproof corrugated sheet.

FIG. 29 is a rear view of the ridge end member.

FIG. 30 is a side view of a ridge end member.

FIG. 31 is a perspective view showing a first stage of a process of attaching the ridge end member.

FIG. 32 is a perspective view showing a second stage of the process of attaching the ridge end member.

FIG. 33 is a sectional view of a ridge end member mounting portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roof 2 Step roof material 2a Eave side step roof material 2b Intermediate section step roof material 2c Building side step roof material 3 Solar cell built-in roof material 4 Building member 5 Roof material joining member 6 Keraba member for step roof 7 Keraba member for daylighting roof 8 Building connection material 9 Building end member 10 Heat insulating material 11 Intermediate connection member 12 Front hanging part 13 Engagement key part 14 Fixing piece 15 Fixing hole 15 'Fixed notch 16 Recessed connecting part 17 Support step 18 Standing wall DESCRIPTION OF SYMBOLS 19 Waterproof wall 20 Projecting part 21 Hook part 22 Cover receiving piece 23 Locking groove 24 Arc-shaped groove part 25,53 Bolt 26 Roof mounting bracket 27 Discarded plate 28 Cap 29 Waterproof plate 30 Drainage groove 31 Water return wall 32,50,64 Nut 33 Rotating curved portion 34 Curved piece 35 Locking ridge 36 Connection cover 37 Key-shaped band portion 38 Rising ridge 39 Cut 40 Cutout 41 Engagement hook 42 Screw 4 3 Building side member 44 Building crown 45 Engagement piece 46 Bolt mounting groove 47 Nut operation notch 48 Mounting bolt 49 Washer 51 Mounting tool 52 Fixing tool 54 Building end face wall 55 Building member fitting piece 56 Insertion cutout 57 Corrugated plate locking projection Article 58 Waterproof corrugated sheet 59 Fixing part engaging part 60 Hook 61 Bolt insertion groove 62 Side wall 63 Rising piece 65 Kerabar member engaging piece 66 Locking down part

Claims (3)

[Claims] 1. A shingled roofing material is laid on one side of a ridge line, and a solar cell built-in roofing material is laid on the other side. On the roof laid over the battery-containing roofing material laying surface, on the upper surface of the ridge-side end of the ridge-side step roofing material laid closest to the ridgeline, the stepped roofing material and the solar cell built-in roofing material laying surface A roof having a height substantially equivalent to the height difference, and a support step on which a lower edge of one side of the ridge member is placed and fixed is formed integrally along the ridge line direction. 2. The roof according to claim 1, wherein a plurality of step roofing materials are arranged side by side along the ridgeline direction, and a joint cover outer surface of a supporting step portion of the adjacent building side step roofing material is covered with a connection cover. 3. An engaging groove that opens to the ridge line side is formed above the supporting step, and an engaging piece that curves downward and protrudes from both lower edges of the ridge member, and one of the engaging pieces is provided. 3. The roof according to claim 1, wherein the roof engages with the locking groove, and the other engagement piece is placed and fixed on a surface of the solar cell built-in roof material. 4.