JP2023101784A - Fireproof nonflammable board, photovoltaic power generation system, and method for laying the same - Google Patents

Abstract

To provide a fireproof nonflammable board capable of preventing fire from spreading to a roof when a module or a cable catches fire, a photovoltaic power generation system and its laying method.SOLUTION: In a residential photovoltaic power generation system including a solar cell module 1 integrated with a building material, a nonflammable board 41 for eaves and a nonflammable board 42 for general use are provided between the solar cell module 1 and a roofing 7 as nonflammable boards for fire protection which are members different from the solar cell module 1 and are arranged separately from the solar cell module 1. A cable 11 and a connector 12 led out from the solar cell module 1 are placed on these fireproof nonflammable boards.SELECTED DRAWING: Figure 9

Description

TECHNICAL FIELD The present invention relates to an incombustible board for fire prevention, a photovoltaic power generation system, and a method of installing the same.

A residential photovoltaic power generation system is formed by installing a photovoltaic module on the roof of a house using a frame, installation metal fittings, or the like. As a solar cell module used in a residential photovoltaic power generation system, a solar cell module that is integrated into a building material (a solar cell module is incorporated in a roof material) is widely used (for example, Patent Documents 1 and 2). A typical residential roof has a structure in which roofing materials such as tiles and slates are placed on members such as rafters, sheathing boards (roof base), and roofing (waterproof sheet). A building material-integrated solar cell module can be installed on a roofing by laying roof tiles.

Solar cell modules are roughly classified into four types: "rooftop type", "steel plate laying type", "steel plate attached type", and "without steel plate type". Among them, three types of "steel plate etc. laying type", "steel plate etc. incidental type" and "steel plate not etc. type" correspond to building material integrated solar cell modules.

In the tile-shaped solar cell module of the "steel plate laying type", a noncombustible material such as a steel plate is laid on the roofing surface directly under the module, and the module is installed thereon. The tile-shaped solar cell module of the "steel plate attached type" attaches a noncombustible material such as a steel plate to the rear surface of the module, and the module attached with the steel plate is directly installed on the roofing. The "steel plate-free type" tile-shaped solar cell module is one in which a module without a steel plate or the like attached to the rear surface of the module is directly installed on the roofing.

On January 28, 2019, the Consumer Safety Investigation Committee published an investigation report (Non-Patent Document 1). Non-Patent Document 1 reports an example in which a fire spread process from the module to the roof (covering board) was confirmed by experiments when it was assumed that the module caught fire in a "steel plate-free type" solar cell module, and the need for fire prevention measures to prevent such fire spread is described.

JP 2014-147286 A JP 2013-249582 A

Consumer Safety Investigation Committee "Investigation Report of Own Causes Based on the Provisions of Article 23, Paragraph 1 of the Consumer Safety Act / Fire Accidents Occurring from Residential Photovoltaic Power Generation Systems"

In the unlikely event that a building material-integrated solar cell module or a cable drawn from a module catches fire, there is a risk of serious damage due to the proximity of the fire source to the roof. Since there is a possibility of fire spreading to the sheathing board or the roofing of the "steel plate-free type" solar cell module, it is important to improve safety as proposed in Non-Patent Document 1.

In addition, in the "steel plate attached type" tile-shaped solar cell module, the cable is directly installed on the roofing of the roof. For this reason, Non-Patent Document 1 describes that even in the "steel plate attached type" roof tile-shaped solar cell module, there is a risk that the fire will spread to the roof if the cable catches fire.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a residential photovoltaic power generation system capable of preventing the spread of fire to the roof in the event that a module or cable catches fire, and a method for installing the same.

A first aspect of the present invention is a fireproof noncombustible board, which is a fireproof noncombustible board having noncombustibility, and is characterized by comprising: a flat plate-like panel main body having a rectangular shape in plan view; a bent engaging portion provided on one end edge extending in the longitudinal direction of the panel main body and engaged with a member to be engaged;

Further, a solar power generation system according to a second aspect of the present invention is a solar power generation system including at least one solar cell module, wherein a noncombustible fireproof plate, which is a member separate from the solar cell module and is noncombustible, is provided between a roofing having a predetermined slope and the solar cell module, the fireproof noncombustible plate has a bent locking portion for locking to a crosspiece extending on the roofing in a direction perpendicular to the slope direction, and a plurality of fireproof noncombustible plates adjacent to each other in the slope direction. is characterized in that the ridge-side edge portion of one of the fireproof incombustible plates and the eave-side edge portion of the other fireproof incombustible plate are connected to each other.

A third aspect of the present invention is a method for laying a solar power generation system, which is a method for laying a solar power generation system including at least one solar cell module, comprising: a first step of disposing a noncombustible fireproof noncombustible plate, which is a member separate from the solar cell module, on a roofing having a predetermined slope; and a second step of arranging the solar cell module on the incombustible plate with a fixing member interposed therebetween. In the first step, the plurality of fireproof incombustible plates adjacent to each other in the gradient direction are arranged by connecting the ridge-side edge portion of one of the fireproof incombustible plates to the eave-side edge portion of the other fireproof incombustible plate.

A solar power generation system according to a fourth aspect of the present invention is characterized in that it comprises crosspieces arranged on a roof base at intervals, solar cell modules laid on the crosspieces, and fireproof incombustible plates arranged between the crosspieces and the solar cell modules, and the fireproof incombustible plates each having an upwardly convex bent engaging portion placed on the crosspieces and engaged with the crosspieces.

In a fifth aspect of the present invention, there is provided a method for laying a photovoltaic power generation system, in which the bent locking portion of the fireproof incombustible plate is placed on the crosspiece from above, the upper surface of the roof base located between the adjacent crosspieces is covered by the panel main body, the fixing bracket attached to the solar cell module is arranged above the bent locking portion, and the fixing bracket is screwed to the crosspiece with the upper surface of the bent locking portion interposed therebetween. It is characterized by tightening and fixing.

The fireproof incombustible plate, the photovoltaic power generation system, and the installation method thereof of the present invention can prevent the spread of fire to the roof when a module or cable catches fire, and provide a residential photovoltaic power generation system with high fireproof performance.

1 is a plan view showing a schematic configuration of a solar cell module used in a residential solar power generation system of the present invention; FIG. FIG. 2 is a cross-sectional view including the eaves side and ridge side ends of the solar cell module of FIG. 1 ; FIG. 2 is a cross-sectional view for explaining a state in the middle of installation work of the residential photovoltaic power generation system according to Embodiment 1; 1A and 1B are a plan view and a cross-sectional view of a noncombustible plate for eaves used in a residential solar power generation system according to Embodiment 1. FIG. FIG. 2 is a cross-sectional view for explaining a state in the middle of installation work of the residential photovoltaic power generation system according to Embodiment 1; FIG. 2 is a diagram showing a rear fixing member used in the residential photovoltaic power generation system according to Embodiment 1, where (a) is a plan view and (b) is a cross-sectional view taken along line AA of (a). FIG. 2 is a cross-sectional view for explaining a state in the middle of installation work of the residential photovoltaic power generation system according to Embodiment 1; 1A and 1B are a plan view and a cross-sectional view of a general noncombustible plate used in a residential photovoltaic power generation system according to Embodiment 1. FIG. FIG. 2 is a cross-sectional view for explaining a state in the middle of installation work of the residential photovoltaic power generation system according to Embodiment 1; FIG. 2 is a cross-sectional view for explaining a state in the middle of installation work of the residential photovoltaic power generation system according to Embodiment 1; FIG. 4 is a plan view showing how the solar cell module and the noncombustible plate for fire prevention overlap. FIG. 2 is a cross-sectional view for explaining a state in the middle of installation work of the residential photovoltaic power generation system according to Embodiment 1; FIG. 2 is a cross-sectional view for explaining a state in the middle of installation work of the residential photovoltaic power generation system according to Embodiment 1; FIG. 7 is a cross-sectional view showing one configuration example of a residential photovoltaic power generation system according to Embodiment 2; FIG. 11 is a cross-sectional view showing one configuration example of a residential photovoltaic power generation system according to Embodiment 3; FIG. 11 is a cross-sectional view showing one configuration example of a residential photovoltaic power generation system according to Embodiment 4; FIG. 11 is a cross-sectional view showing one configuration example of a residential photovoltaic power generation system according to Embodiment 4; FIG. 11 is a cross-sectional view showing one configuration example of a residential photovoltaic power generation system according to Embodiment 4; FIG. 11 is a cross-sectional view showing one configuration example of a residential photovoltaic power generation system according to Embodiment 4;

[Embodiment 1]
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Structure of solar cell module>
First, the basic configuration of a solar cell module 1 used in a residential solar power generation system of the present invention will be described with reference to FIGS. 1 and 2. FIG. The solar cell module 1 is a building-material-integrated solar cell module that can be installed on a roofing with tiles. In addition, the solar cell module 1 is a "steel plate-free type" solar cell module. Since the solar cell module 1 itself has a known configuration, the configuration of the solar cell module 1 will be briefly described below.

FIG. 1 is a plan view showing a schematic configuration of a solar cell module 1. FIG. A solar cell module 1 is composed of a rectangular solar cell panel 2 that photoelectrically converts sunlight, and a frame 3 arranged around the periphery of the solar cell panel 2 . The frame 3 is composed of four module frames attached to each of the four sides of the solar cell module. In the solar cell module 1, the front frame 31 attached to the eaves side and the rear frame 32 attached to the ridge side have different shapes on the two sides of the roof facing each other along the water flow direction.

The solar battery panel 2 is, for example, one in which solar battery cells are sandwiched and sealed between one glass plate and a protective layer (back sheet). Alternatively, a solar cell formed by sequentially laminating a transparent electrode film, a photoelectric conversion layer (semiconductor layer), and a back electrode film may be sandwiched between two glass plates, and the edges of each glass plate may be sealed. A more detailed description of this solar cell panel 2 is that a transparent electrode, a photoelectric conversion layer made of a semiconductor layer, and a back electrode layer are laminated in this order on a glass substrate, which is a light-transmitting substrate, to form a solar cell, and a light-transmitting glass substrate, which is a protective plate, is attached to the back electrode layer side, and the space between the glass substrates is sealed.

FIG. 2 is a cross-sectional view including the eaves-side and ridge-side ends of the solar cell module 1 . The front frame 31 and the rear frame 32 are made of, for example, an aluminum material, and the cross-sectional shape perpendicular to the longitudinal direction is basically the same shape at any point. The cross-sectional structure of the front frame 31 and the rear frame 32 shown in FIG. 2 is merely an example, and the present invention is not limited to this structure.

At the upper end of the front frame 31, a panel front end holding portion 311 having a substantially U-shaped cross section with an opening on the ridge side is formed. The front end portion of the solar cell panel 2 is inserted and held in the panel front end holding portion 311 . The panel front end holding portion 311 and the solar cell panel 2 are adhered with an adhesive or the like, and the front frame 31 is fixed to the solar cell panel 2 by this adhesion. A first engaging portion 312 is formed at the lower end of the front frame 31 and extends substantially horizontally toward the ridge.

A panel rear end holding portion 321 having an approximately U-shaped cross section with an opening on the eaves side is formed at the front upper end of the rear frame 32 . The rear end portion of the solar cell panel 2 is fitted and held in the panel rear end holding portion 321 . The panel rear end holding part 321 and the solar cell panel 2 are adhered with an adhesive or the like, and the rear frame 32 is fixed to the solar cell panel 2 by this adhesion.

The upper surface 32a of the rear frame 32 is provided with a second engaging portion 322 having a substantially L-shaped cross section, which is erected upward from the upper surface 32a and bent toward the eaves side. The lower surface 32b of the rear frame 32 is provided with a third engaging portion 323 having a substantially L-shaped cross section, which is erected downward from the lower surface 32b and bent toward the eaves side.

Further, a reinforcing bar 33 for connecting and reinforcing the front frame 31 and the rear frame 32 may be provided on the rear surface of the solar cell module 1 . The reinforcing bar 33 is connected to the front frame 31 at its front end and connected to the rear frame 32 at its rear end, thereby preventing the front frame 31 and the rear frame 32 from coming off the solar panel 2 .

Next, the structure and installation procedure of the residential photovoltaic power generation system according to Embodiment 1, that is, the roof mounting structure and installation procedure of the solar cell module 1 will be described with reference to FIGS. 3 to 9. FIG.

In the residential photovoltaic power generation system according to the present embodiment, a plurality of photovoltaic modules 1 can be installed on a sloping roof in such a manner that they are covered with tiles along the water flow direction A. Moreover, the solar cell modules 1 are arranged in an array not only along the water flow direction A but also along the horizontal direction (the direction orthogonal to the water flow direction A). The solar cell modules 1 arranged in the horizontal direction are also connected to each other by the frame 3. Since a well-known structure can be used for this connection structure, a detailed description thereof will be omitted here. Note that the residential photovoltaic power generation system of the present invention is not limited to a configuration in which a plurality of solar cell modules 1 are arranged in an array, and may include at least one solar cell module 1.

When installing a plurality of solar cell modules 1 along the water flow direction A, they are installed in order from the eaves side toward the ridge side. Therefore, in the following description, the solar cell module 1 installed closest to the eaves in the residential photovoltaic power generation system is counted as the first row, and the second row, the third row, and so on are counted toward the ridge side.

A roof on which a residential photovoltaic power generation system is laid has a roofing 7 laid on sheathing boards 6, and tiles 5 and crosspieces 8 for hooking solar cell modules 1 on the roofing 7 are arranged at predetermined intervals.

In the first stage of the installation work of a residential photovoltaic power generation system, roof tiles 5 are attached to the most eaves side of the roof, as shown in FIG. Specifically, the rear end of the tile 5 is hooked on the crosspiece 8 and fixed to the crosspiece 8 with a wood screw or the like. At this time, a front fixing metal fitting 91 is placed on the rear end portion of the upper surface 5a of the roof tile 5, and the front fixing metal fitting 91 is fastened together with the roof tile 5 with a wood screw or the like. The front fixing fitting 91 fastened together with the roof tile 5 forms a gap with the eaves side opened between the roof tile 5 and the upper surface 5a of the roof tile 5, and the first engagement part 312 of the front frame 31 is engaged with this gap.

After the roof tile 5 and the front fixing bracket 91 are installed, the noncombustible board 41 for eaves is placed on the ridge side of the roof tile 5, as shown in FIG. The eaves noncombustible board 41 is arranged below the solar cell modules 1 in the first row, and is a fireproof noncombustible board for preventing the spread of fire to the roof when the modules or cables of the solar cell modules 1 catch fire. The material of the eaves noncombustible board 41 is not particularly limited as long as it is noncombustible, but a steel plate or the like can be suitably used.

FIG. 4 is a plan view and a sectional view of the incombustible board 41 for eaves. At the front end (eaves side end) of the eaves incombustible board 41, there is formed a bending part 411 having a substantially L-shaped cross section which is erected upward and bent toward the eaves side. At the rear end (ridge side end) of the incombustible board 41 for eaves, there is formed a convex portion 412 that protrudes upward and has a substantially U-shaped cross section. A flat plate portion 413 is formed so as to be connected to the further rear side (ridge side) of the convex portion 412 . In addition, the incombustible eaves board 41 may be appropriately provided with drain grooves and drainage holes for draining rainwater or the like flowing over the incombustible board 41 for eaves.

The eaves incombustible board 41 is placed so that the bent portion 411 is placed on the rear end of the roof tile 5 and the convex portion 412 is placed on the crosspiece 8 . The incombustible board 41 for eaves placed in this way can be installed with a certain amount of space between it and the roofing 7 (that is, separated from the roofing 7). Furthermore, the projecting portion 412 is caught on the crosspiece 8, thereby preventing the incombustible board 41 for eaves from slipping down due to gravity on the sloped roof during construction, thereby improving workability.

The separation distance between the eaves incombustible board 41 and the roofing 7 is, for example, 1 to 14 mm. In addition, by setting the separation distance to 3 mm or more, water can easily flow over the roofing 7, and safety in the event of fire can be enhanced compared to the case where the roofing 7 is in contact. In addition, since the height of the crosspiece 8 is generally about 15 mm, the protrusion 412 can be more easily caught on the crosspiece 8 by setting the separation distance to 10 mm or less.

When the eaves incombustible board 41 is placed, as shown in FIG. 5, the solar cell modules 1 in the first row are installed thereon. At this time, the cables 11 and the connectors 12 drawn out from the solar cell modules 1 in the first row are also placed on the incombustible board 41 for eaves. Here, the cable 11 and the connector 12 correspond to the cable member described in the claims.

A rear fixing bracket 92 is used to install the solar cell module 1 in the first row. 6A and 6B are views showing the rear fixing metal fitting 92, in which FIG. 6A is a plan view and FIG.

At the front end (eaves side end) of the rear fixing metal fitting 92, a fourth engaging portion 921 having a substantially L-shaped cross section is formed, which is erected upward and bent toward the ridge side. In addition, as shown in FIG. 6A, a plurality of notches may be formed in the fourth engaging portion 921 . At the rear end (ridge side end) of the rear fixing bracket 92, an engagement piece 922 is formed to stand downward. The engaging piece 922 is formed by making a plurality of slit-like cuts in the rear end of the rear fixing metal fitting 92 and bending downward the portion between the cuts.

As a preliminary step to installing the solar cell module 1, the rear fixing bracket 92 is attached to the solar cell module 1 as shown in FIG. Specifically, the rear fixing metal fitting 92 is attached to the solar cell module 1 by engaging the fourth engaging portion 921 of the rear fixing metal fitting 92 with the third engaging portion 323 of the rear frame 32 .

The solar cell module 1 to which the rear fixing bracket 92 is attached is attached to the first engaging portion 31 of the front frame 31.
2 is engaged with the front fixing metal fitting 91 and the rear fixing metal fitting 92 is placed on the crosspiece 8. - 特許庁At this time, the engaging piece 922 of the rear fixing metal fitting 92 is positioned on the ridge side of the crosspiece 8 to prevent the disposed solar cell module 1 from sliding down due to gravity. The arranged solar cell module 1 is installed (fixed) by fastening the rear fixing bracket 92 together with the previously placed incombustible eaves board 41 to the crosspiece 8 with wood screws or the like. For this reason, a plurality of screw holes 414 are formed at predetermined intervals in the eaves incombustible plate 41 (see FIG. 4), and a plurality of screw holes 923 are formed at predetermined intervals in the rear fixing bracket 92 (see FIG. 6).

When the solar cell modules 1 in the first row are installed, as shown in FIG. 7, a general noncombustible plate 42 is placed on the ridge side of the solar cell modules 1 in the first row. The general noncombustible board 42 is arranged below the solar cell modules 1 in the second and subsequent rows, and is a fireproof noncombustible board for preventing fire from spreading to the roof when a module or cable of the solar cell module 1 catches fire. As with the noncombustible board 41 for eaves, the material of the general noncombustible board 42 is not particularly limited as long as it is noncombustible, but a steel plate or the like can be suitably used.

8A and 8B are a plan view and a cross-sectional view of a general-use incombustible plate 42. FIG. At the rear end (ridge-side end) of the general-purpose incombustible plate 42, there is formed a convex portion 421 which is convex upward and has a substantially U-shaped cross section. A flat plate portion 422 is formed so as to be connected to the rear (ridge side) of the convex portion 421 . Also, the general noncombustible board 42 may be appropriately provided with drainage grooves and drainage holes for draining rainwater or the like flowing over the general noncombustible board 42 . Also, in the general-use incombustible plate 42, a plurality of screw holes 423 are formed at predetermined intervals.

The general incombustible board 42 is placed so that its front end (eaves side end) is placed on the flat plate part 413 of the eaves incombustible board 41 and the convex part 421 is placed on the crosspiece 8 . The general incombustible board 42 placed in this way can be installed with a certain amount of space between it and the roofing 7 . Furthermore, the projecting part 421 is caught on the crosspiece 8, which prevents the general-use incombustible board 42 from sliding down due to gravity on the sloped roof during construction, thereby improving workability.

The separation distance between the general-purpose incombustible plate 42 and the roofing 7 is, for example, 1 to 14 mm. In addition, by setting the separation distance to 3 mm or more, water can easily flow over the roofing 7, and safety in the event of fire can be enhanced compared to the case where the roofing 7 is in contact. In addition, since the height of the crosspiece 8 is generally about 15 mm, setting the separation distance to 10 mm or less makes it easier for the projection 421 to be caught on the crosspiece 8 .

After the general-use incombustible plate 42 is placed, the solar cell modules 1 in the second row are placed thereon, as shown in FIG. Cables and connectors pulled out from the solar cell module may be arranged on the lower side (back side) of the module, or may be pulled up to the module building side (that is, not arranged on the lower side of the module). At this time, if the cables 11 and the connectors 12 are arranged on the lower side (rear side) of the solar cell modules 1, the cables 11 and the connectors 12 pulled out from the solar cell modules 1 in the second row can also be placed on the general noncombustible plate 42.

Further, even if the cables 11 and the connectors 12 are arranged on the lower side (rear side) of the solar cell module 1, the configuration is not limited to the configuration in which the cables 11 and the connectors 12 are placed on the general noncombustible plate 42. For example, the cable 11 and the connector 12 may be attached to the back surface of the solar panel 2 using some kind of member, and arranged between the solar cell module 1 and the noncombustible plate for fire prevention. Even with such a configuration, there is no change in the existence of the general noncombustible plate 42 between the cable 11 and the connector 12 and the roof.

The installation method of the solar cell modules 1 in the second row is generally the same as that of the solar cell modules 1 in the first row, except that the first engaging portion 312 of the front frame 31 is engaged with the second engaging portion 322 of the rear frame 32 of the solar cell modules 1 in the first row. The solar cell modules 1 in the third and subsequent rows are installed in the same manner as the solar cell modules 1 in the second row. Moreover, as shown in FIG. 10, roof tiles 5 may be installed further on the ridge side of the solar cell modules 1 in the last row (most on the ridge side).

As described above, in the residential photovoltaic power generation system according to Embodiment 1, the eaves incombustible plate 41 or the general incombustible plate 42, which is a fireproof incombustible plate, is arranged below the solar cell module 1. These fireproof incombustible plates are separate members from the solar cell module 1 and are separated from the solar cell module 1. Cables 11 and connectors 12 can also be placed on these incombustible plates for fire prevention. FIG. 11 is a plan view showing how the solar cell module 1 and the noncombustible plate for fire prevention overlap. In addition, in FIG. 11, the noncombustible board for fire protection (here, the general noncombustible board 42) is indicated by diagonal hatching. As shown in FIG. 11, these fireproof incombustible plates are interposed between the solar cell module 1 and the roof so as to entirely cover the arrangement area of the solar cell module 1 .

For this reason, when the solar cell module 1 is "a steel plate-free type", even if a fire occurs from the module or the cable, the flame spread to the roof is prevented by the fireproof incombustible plate, and a residential solar power generation system with high fireproof performance can be provided. The cable 11 and the connector 12 do not necessarily have to be placed on the fireproof noncombustible plate, and may be arranged between the solar cell module 1 and the fireproof noncombustible plate. Even in this case, the same effect as described above can be obtained.

In the present invention, the solar cell module 1 is not limited to the "without steel plate or the like type". That is, even when the solar cell module 1 is of the "attached type such as a steel plate", the spread of the fire to the roof when the cable catches fire is prevented, and the application of the present invention is effective.

In addition, the eaves incombustible board 41 and the general incombustible board 42 drain the water on the eaves incombustible board 41 and the general incombustible board 42, which are fireproof incombustible boards, and desirably have drainage grooves (or drain holes) for preventing water from accumulating on these fireproof incombustible boards. That is, the water on the fireproof incombustible board flows along the water flow direction A, and is drained from the drainage groove provided in the fireproof incombustible board or from the drainage groove of another fireproof incombustible board installed on the eaves side. Furthermore, since these fireproof incombustible plates are spaced apart from the roofing 7 , they do not block the flow of water on the roofing 7 . These drainage grooves are preferably arranged between the screw holes 414 of the eaves incombustible board 41 and the screw holes 423 of the general incombustible board 42 in the horizontal direction of the roof (the direction perpendicular to the water flow direction A). At the screw holes 414 and 423, wood screws are inserted into the sheathing board 6, so that these parts are the weakest in terms of waterproofing, and it is preferable that these drainage grooves are provided as far away from these screw holes as possible.

In the residential photovoltaic power generation system described above, the ordinary roof tile 5 is installed on the eaves side of the solar cell module 1 in the first row, but the present invention is not limited to this, and as shown in FIG. In this case, the front fixing bracket 93 and the eaves incombustible plate 43 are first fastened to the roof with wood screws or the like, and then the solar cell modules 1 in the first row are installed. The method of installing the solar cell modules 1 in the second and subsequent rows is the same as described above. In FIG. 12, the eaves incombustible board 43 is arranged under the front fixing bracket 93, and the eaves incombustible board 43 and the front fixing bracket 93 are fastened together to the roof. However, as shown in FIG. Although not shown, a member in which the incombustible board 43 for eaves and the front fixing metal fitting 93 are integrated may be used.

Further, in a residential photovoltaic power generation system, each solar cell module 1 needs to be grounded. In a conventional residential photovoltaic system, the included solar cell modules are grounded, but in the residential photovoltaic system according to Embodiment 1, the fixing brackets (front fixing brackets 91 and 93 and rear fixing bracket 92) and fireproof noncombustible plates (eave noncombustible plates 41 and 43 and general noncombustible plate 42) are in contact with each other, and these are in continuous conduction. You can also

When using a fixing bracket or an incombustible plate for fire prevention as a grounding path, a configuration in which grounding spikes (projections) (see FIGS. 4 and 8) are provided at arbitrary locations (preferably multiple locations) on the contact surface with other members. At the location where such a grounding spike is provided, a pressure contact force is generated between the contacting members, making it possible to ensure electrical continuity between the members.

[Embodiment 2]
In the first embodiment, the front fixing bracket 91 and the eaves noncombustible board 41 are used as separate members, and the rear fixing bracket 92 and the general noncombustible board 42 are used as separate members. That is, it is possible to make the incombustible plate for fire prevention have the functions of the front fixing bracket and the rear fixing bracket.

As shown in FIG. 14, the residential photovoltaic power generation system according to Embodiment 2 uses a noncombustible board 44 for eaves having a function of a front fixing bracket and a general noncombustible board 45 having a function of a rear fixing bracket.

The eaves noncombustible board 44 is used as a fireproof noncombustible board for the solar cell module 1 in the first row, and is also used as a front fixture for the solar cell module 1 in the first row. In addition, the general noncombustible plate 45 is used as a fireproof noncombustible plate for the solar cell modules 1 in the second and subsequent rows, and is also used as a rear fixing bracket for the solar cell module 1 on the eaves side.

However, when the general noncombustible plate 45 is used as the rear fixing bracket, it is assumed that another solar cell module 1 is installed on the ridge side, so the general noncombustible plate 45 is not used as the rear fixing bracket for the solar cell module 1 in the last row. The rear fixing bracket 92 described in the first embodiment is used as the rear fixing bracket for the solar cell module 1 in the last row.

[Embodiment 3]
In Embodiment 1, the cable 11 and the connector 12 drawn out from the solar cell module 1 are placed on and held on the incombustible board 41 for eaves and the incombustible board 42 for general use, which are incombustible boards for fire prevention. In contrast, in the third embodiment, the function of holding the cable 11 and the connector 12 is given to the front fixing bracket and the rear fixing bracket.

As shown in FIG. 15, the residential photovoltaic power generation system according to Embodiment 3 uses a front fixing bracket 94 and a rear fixing bracket 95 having a function of holding cables 11 and connectors 12 . Specifically, the front fixing metal fitting 94 and the rear fixing metal fitting 95 each have a holding tray (holding tray portion) 941 and a holding tray (holding tray portion) 951 on the ridge side of the portion screwed to the crosspiece 8 . Cable 11 and connector 12 are placed and held on holding tray 941 and holding tray 951 .

Further, in the residential photovoltaic power generation system according to Embodiment 3, a general noncombustible plate 46 is used as the fireproof noncombustible plate. The general incombustible plate 46 can be placed so that its front end is hooked on the rear wall of the holding tray 941 or the holding tray 951 . Also in the third embodiment, the rear fixing metal fittings 92 described in the first embodiment are used as the rear fixing metal fittings for the solar cell modules 1 in the last row.

In the residential photovoltaic power generation system according to Embodiment 3, the general noncombustible plate 46 is used when the solar cell module 1 is "a type without steel plates, etc.", but the general noncombustible plate 46 can be omitted when the solar cell module 1 is "a type with steel plates, etc.". This is because the solar cell module 1 of the “attached type such as steel plate” only needs to prevent the spread of fire to the roof when the cable 11 or the connector 12 catches fire, and this effect can be obtained only with the holding tray 941 and the holding tray 951 provided on the front fixing bracket 94 and the rear fixing bracket 95.

In addition, in the residential photovoltaic power generation system according to Embodiment 3, it is sufficient to use only one type of general-use incombustible plate 46 as the fireproof incombustible plate, and in this case, there is also an advantage in terms of cost.

[Embodiment 4]
In Embodiments 1 to 3 above, the case where the crosspieces 8 are provided on the roof on which the residential solar power generation system is laid is exemplified, but the present invention is not limited to this, and the residential solar power generation system can also be laid on a roof where the crosspieces 8 are not provided. A configuration example of the residential photovoltaic power generation system in this case is shown in FIGS. 16 to 19 below.

The residential photovoltaic power generation system shown in FIG. 16 is configured using a solar cell module 1 , a rear fixing metal fitting 96 , a holding tray plate (holding tray portion) 97 and a general noncombustible plate 47 . As a procedure for laying this residential photovoltaic power generation system, the general noncombustible plate 47 (rear end), the rear fixing metal fitting 96 and the holding tray plate 97 are fastened together to the sheathing board 6 and the roofing 7 with wood screws or the like, and the general noncombustible plate 47 in the next row is placed on the ridge side. A stepped portion 471 is provided at the front end of the general noncombustible plate 47, and by hooking the stepped portion 471 to the rear end of the holding tray plate 97, the general noncombustible plate 47 before being fixed can be prevented from slipping down. Further, the solar cell module 1 in the next row is installed on the general noncombustible plate 47 placed in the next row. By repeating these steps, the residential photovoltaic system shown in FIG. 16 can be installed.

The residential photovoltaic power generation system shown in FIG. The rear fixing bracket 98 is a member in which the rear fixing bracket 96 and the holding tray plate 97 shown in FIG. 16 are integrated. Therefore, the installation procedure of the residential solar power generation system shown in FIG. 17 is basically the same as that of the residential solar power generation system shown in FIG.

The residential photovoltaic power generation system shown in FIG. The residential photovoltaic power generation system shown in FIG. The general non-combustible plate 48 and the general non-combustible plate 49 have the function of a rear fixture for the solar cell modules 1 in the front row. Further, the general noncombustible plate 48 is arranged so as to be in contact with the roofing 7 almost entirely, but the general noncombustible plate 49 can be arranged apart from the roofing 7 except for the screwed portions.

As a procedure for laying these residential photovoltaic power generation systems, a general noncombustible board 48 or a general noncombustible board 49 is fixed to the sheathing board 6 and the roofing 7 with wood screws or the like, and the solar cell module 1 is installed thereon. By repeating these procedures, the residential photovoltaic system shown in FIG. 18 or 19 can be installed.

The embodiments disclosed this time are exemplifications in all respects and are not grounds for restrictive interpretation. Therefore, the technical scope of the present invention is not to be interpreted only by the above-described embodiments, but is defined based on the claims. In addition, all changes within the meaning and range of equivalents to the scope of claims are included.

1 solar cell module 11 cable (cable member)
12 connector (cable member)
2 Solar panel 3 Frame 31 Front frame 32 Rear frame 41, 43, 44 Incombustible board for eaves (noncombustible board for fire prevention)
42, 45, 46, 47, 48, 49 Noncombustible board for general use (noncombustible board for fire protection)
5 Roof tile 6 Sheathing board 7 Roofing 8 Crosspieces 91, 93, 94 Front fixing metal fittings 92, 95, 96, 98 Rear fixing metal fittings 97 Holding tray plate (holding tray part)
941, 951 holding tray (holding tray section)

Claims (13)

A fireproof noncombustible board having noncombustibility,
a flat panel main body having a rectangular shape in plan view;
a bent locking portion provided at one end edge portion extending in the longitudinal direction of the panel main body portion and locked to the engaged member;
A noncombustible board for fire prevention, comprising a flat plate portion provided on the opposite side of the panel main body portion with respect to the bending locking portion and connected to another panel main body portion. In the incombustible board for fire prevention according to claim 1,
The incombustible board for fire prevention, wherein the bent engaging portion has a convex shape protruding toward one side of the panel main body. In the incombustible board for fire prevention according to claim 1 or 2,
An incombustible board for fire prevention, wherein the flat plate portion is formed in a flat plate shape parallel to the panel main body portion. In the incombustible board for fire prevention according to any one of claims 1 to 3,
An incombustible board for fire prevention, characterized in that a drainage groove or a drainage hole for draining water flowing on the incombustible board for fire prevention is provided. A photovoltaic power system comprising at least one photovoltaic module,
A fireproof noncombustible plate, which is a member separate from the solar cell module and has noncombustibility, is provided between the roofing having a predetermined slope and the solar cell module,
The incombustible plate for fire prevention has a bent locking portion that locks to a crosspiece extending on the roofing in a direction perpendicular to the direction of the slope,
The plurality of fireproof incombustible plates adjacent to each other in the gradient direction are arranged such that the ridge-side edge of one fireproof incombustible plate and the eave-side edge of the other fireproof incombustible plate are connected to each other. Solar power generation system. In the photovoltaic power generation system according to claim 5,
The photovoltaic power generation system, wherein the fireproof incombustible plates are formed in flat plate-like edge portions on the eaves side and the ridge side, and are arranged so as to overlap each other. A method for installing a photovoltaic system comprising at least one photovoltaic module, comprising:
a first step of disposing a noncombustible fireproof plate, which is a separate member from the solar cell module, on a roofing having a predetermined slope, and locking a bent locking portion provided on the fireproof noncombustible plate to a crosspiece extending in a direction perpendicular to the direction of the slope;
a second step of arranging the solar cell module on the incombustible board for fire protection with a fixing member interposed therebetween;
In the first step, a plurality of fireproof incombustible plates adjacent to each other in the gradient direction are arranged by connecting the ridge-side edge portion of one fireproof incombustible plate and the eave-side edge portion of the other fireproof incombustible plate. In the method for laying a photovoltaic power generation system according to claim 7,
In the second step, the installation method of a photovoltaic power generation system, wherein the fixing member and the solar cell module are fastened together to the crosspiece with a fastener. Crosspieces arranged at intervals on the roof base,
a solar cell module laid on the crosspiece;
a fireproof incombustible plate disposed between the crosspiece and the solar cell module,
The solar power generation system according to claim 1, wherein the fireproof incombustible plate has an upwardly convex bent locking portion that is placed on the crosspiece and locked to the crosspiece. The solar power generation system according to claim 9,
a panel main body portion for covering the upper surface of the roof substrate located between the adjacent crosspieces, and the incombustible plate for fire prevention extends from one lower end of the bending engagement portion in a direction opposite to the bending engagement portion;
a flat plate portion extending from the other lower end of the bent locking portion in a direction opposite to the bent locking portion. The solar power generation system according to claim 9 or 10,
The solar power generation system, wherein the fireproof incombustible board has a drainage groove or a drainage hole for draining water flowing on the fireproof incombustible board. The solar power generation system according to any one of claims 9 to 11,
A photovoltaic power generation system, wherein the incombustible plate for fire prevention is arranged apart from the roof base. A method for laying a photovoltaic power generation system according to claim 10,
The bent engaging portion of the fireproof incombustible plate is placed on the crosspiece from above, and the panel body covers the upper surface of the roof base located between the adjacent crosspieces,
A method for laying a photovoltaic power generation system, wherein a fixing metal fitting attached to the solar cell module is arranged above the bending locking portion, and the fixing metal fitting is fixed to the crosspiece with screws on both sides of the upper surface of the bending locking portion.

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