JP2001248276A - Method for installing solar battery plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To excellently achieve construction of a double roofing structure which is excellent in heat insulating properties and cost efficiency, by preventing breakage of a waterproof sheet directly laid on existing flat roof tiles during installation work, when solar battery roof tiles are superposably roofed on an existing roof. SOLUTION: The waterproof sheet 1 formed of an elastic material including a fiber reinforced layer is laid on the existing roof Y on which the flat roof tiles 12 are laid. Then, the solar battery roof tiles A each being provided with a solar battery 7 are superposably roofed on the waterproof sheet 1. The waterproof sheet 1 is formed by preparing rubber asphalt obtained by soaking blown asphalt with rubber, impregnating felt which is a synthetic non-woven fabric with the above prepared rubber asphalt to obtain a fiber-reinforced layer, superposing rubber asphalt layers on both sides of the fiber-reinforced layer, and then superposing a mineral particle layer on a front surface of the resultant laminate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a solar cell plate, and more particularly, to a technique for laying a solar cell plate on an existing roof material without peeling off the roof material.

[0002]

2. Description of the Related Art In recent years, an energy-saving house (e.g., an energy-saving house) has been developed in which a solar cell is laid on a roof so that power can be generated and stored, thereby saving electricity bills and being self-sufficient in the event of a power outage. Energy-saving homes) have been spotlighted because they are nature-friendly and can save resources. In order to lay this solar cell plate on a roof, it is common practice to use a solar cell plate instead of a roof material such as a tile, that is, to construct the house as a roof material when building a new house.

[0003]

It is generally considered preferable that roofing materials such as Western tiles are regularly replaced with new ones due to deterioration. Therefore, when replacing the roof, that is, at the time of renovation, by replacing the general roofing material with a solar cell board, it is possible to eliminate the waste of peeling off and replacing the roofing material that can still be used, and smoothly even if it is not a new construction It is possible to make energy-saving housing. However, removing the degraded roofing material requires considerable labor and is costly.Therefore, without removing the existing roofing material, double- It has been tried to adopt thatched structure.

[0004] A typical roof structure of a house is to lay a waterproof sheet on a ground board and then lay a roofing material such as a Western tile on the waterproof sheet. Similarly, when roofing solar panels on an existing roof,
A structure was adopted in which a waterproof sheet was laid on the existing roof, and a solar cell plate was laid on the sheet. However, with the general roof structure, the waterproof sheet breaks during the installation work of the solar cell plate, and it is found that it becomes useless, and it is urgently necessary to take some measures. is there.

In other words, the roof on which the flat tiles are overlaid is not flat, but has an uneven surface state with a distinct step due to the overlaying, so that a worker working on the roofing material steps on the lower surface near the step. The waterproof sheet is relatively easily broken due to tension when the sheet is pulled or stress concentration when stepping on a corner of the step (see FIG. 13). On the other hand, at the time of new construction or conventional remodeling, in order to lay a waterproof sheet on the top surface of the base plate, which is a flat state without irregularities,
Such a problem did not arise.

An object of the present invention is to prevent a waterproof sheet directly laid on an existing roofing material from being broken during work when stacking a solar cell plate thereon without peeling off the existing roofing material. In addition, it is excellent in heat insulation properties, and is capable of economical double-roof construction.

[0007]

According to a first aspect of the present invention, there is provided a method of mounting a solar cell plate, comprising the steps of mounting an existing roof Y on which a flat roof tile 12 is laid, as shown in FIGS.
Then, a waterproof sheet 1 made of an elastic material 3 provided with a fiber reinforcing layer 2 is laid, and a solar cell plate A having a solar cell 7 is overlaid on the waterproof sheet 1. .

[0008] The method of claim 2 is as shown in FIG.
In the method according to claim 1, the waterproof sheet 1 has a reinforcing material 2a made of a non-woven fabric of synthetic fiber impregnated with an elastic material made of rubber asphalt in which blown asphalt contains rubber. It is characterized by being laminated with rubber asphalt.

As described above, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration and the method of the accompanying drawings by the entry.

[Operation] When the structure of the conventional waterproof sheet was examined, it was as shown in FIG. That is, the blown asphalt 26 is laminated on both sides of the base paper 25 impregnated with asphalt, and the surface of the blown asphalt layers 26, 26 is coated with the mineral powder 27 to form a multilayer structure. Blown asphalt is rich in asphaltenes, has relatively high elasticity, and is suitable for waterproofing and roofing. It was torn and had broken (see FIG. 13).

Therefore, according to the method of the first aspect, the waterproof sheet is made of an elastic material provided with a fiber reinforcing layer and has a high tensile strength and elasticity. It can withstand the tension and stress concentration due to stepping on, and can perform the roofing work of the solar cell boards while walking on the waterproof sheet without breaking the sheet.

Although described in detail in the embodiment section, the following operation is also provided. That is, when fixing the fixing bracket of the solar cell plate to the existing roof using nails or the like from above the waterproof sheet, the pitch of the solar cell plate and the pitch of the flat tile are often different, and the fixing bracket is formed on the step of the flat tile. May straddle. In such a situation, when the conventional waterproof sheet is laid, the mounting posture of the bracket becomes unstable and a predetermined mounting strength is difficult to be obtained, or the sheet is hit by an impact when the nail is hit below the step. The inconvenience of tearing has occurred (see FIG. 14). On the other hand, in the method of the present invention using a waterproof sheet having a high tensile strength and elasticity, it can withstand the impact of nailing and does not break, and the surface on which the fixing bracket is placed is sufficiently recessed to reduce the step, The bracket mounting posture can be stabilized by approaching the surface contact as much as possible.

According to the method of claim 2, the waterproof sheet is
It is made by laminating rubber asphalt on each side of a fiber reinforced layer made by impregnating an elastic material made of rubber asphalt with blown asphalt containing rubber into a reinforcing material made of synthetic fiber non-woven fabric, on both sides. 2. The effect of the method according to claim 1, wherein the rubber-containing effect can be further enhanced by the inclusion of rubber, and the elasticity of the fiber reinforcing layer for reinforcing the tensile strength is also improved. Can be suitably exerted.

[Effects] In the method for mounting a solar cell plate according to the first and second aspects, a waterproof sheet made of an elastic material provided with a fiber reinforcing layer is used, so that it can follow a general roof construction method. There was no inconvenience such as tearing of the waterproof sheet during installation and instability of the mounting of the solar cell plate, and the double roofing of the solar cell plate on the existing roof was successfully performed. .

In the method for mounting a solar cell plate according to the second aspect, the waterproof sheet is made of a general material such as asphalt and synthetic fiber, which is economical and excellent in waterproofing. However, there is an advantage that the above effect can be obtained.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 4, the method of mounting the solar cell plate according to the present invention is to lay the waterproof sheet 1 mainly composed of rubber asphalt on the existing roof Y on which the flat roof tiles 12 are laid, without removing the existing roof Y. Then, a solar cell plate (also referred to as a solar cell tile) A is overlaid. By doing so, the cost and time for removing the existing roofing material 12 are not required, and the double roofing has the advantage of doubling the heat insulating effect, and thus has many advantages.

FIG. 4 shows an example in which a waterproofing sheet 1 is laid on an existing flat roof tile 12, and then a stepped shape is formed from above so as to exhibit a triangle conforming to the shape of the roof. The solar cell plate A is laid while increasing the number of juxtaposed units.
However, a triangular member 28 is provided at the end to fill the uneven shape and improve the appearance, and they are collectively arranged in a neat triangular shape as a whole. On the uppermost stage, an upper discard plate 2 that covers a portion where the power cable 17 is taken into the room side
4 (see FIG. 9), and the remaining portion of the solar cell plate A, which is not laid, is double-roofed with a new flat roof tile 12 which is the same as the existing flat roof tile 12.

Next, the structure of each component will be described. As shown in FIG. 1, the waterproof sheet 1 is a sheet having a multilayer structure mainly composed of asphalt, and its cross-sectional structure is as follows. That is, elastic layers 3 and 3 made of only rubber asphalt are laminated on both sides of a fiber reinforcing layer 2 formed by impregnating felt 2a which is a reinforcing material made of a synthetic fiber nonwoven fabric with rubber asphalt as an elastic material. It is. Rubber asphalt is obtained by adding rubber to blown asphalt.

Then, on the outer surface side of one elastic material layer 3,
The mineral powder layer 4 and the special synthetic resin film 5 are laminated in this order, and the mineral powder layer 4 is laminated on the outer surface side of the other elastic material layer 3. A plurality of (three) strip-shaped self-adhesive layers 6 composed of 6a and release paper 6b are formed. In actual laying, the special synthetic resin film 5 is on the upper surface side, and the strip-shaped self-adhesive layer 6 is on the lower surface side.

As shown in FIGS. 2 and 3, the solar cell plate A
Is provided with a solar cell unit 9 formed by bonding a solar cell module 7 to the upper surface of a metal roofing material 8 and a backup material 10. The backup material 10 includes two fixing brackets 11 for fixing to the roof, a hook portion 14 for pressing the upper end side of the solar cell module 7, an engaging portion 15 for connecting the lower solar cell plate A, and the like. Is formed. The glass covering the surface of the solar cell module 7 is a general glass, but a tempered glass is desirable.

Next, a method and a procedure for superimposing the solar cell plate A on the existing roof on which the flat roof tiles 12 are laid will be described. The above-mentioned waterproof sheet 1 is laid on an existing roof Y, which is formed by stacking flat tiles 12 such as colonial roofs. One waterproof sheet 1 is rectangular, and the release sheet 6b is peeled off from the lower end of the roof Y such that the longitudinal direction of the sheet is in the girder direction (along the eaves) as shown in FIG. It is stuck on the upper surface of the flat roof tile 12.

As shown in FIG. 6, the lower end of the upper waterproof sheet 1 to be laid later in the vertical direction (flow direction) is overlapped with the upper end of the lower waterproof sheet 1 by 100 mm or more. And lay 200mm or more in the left-right direction (girder direction). The overlapping directions are aligned, and the waterproof sheets 1 that are adjacent in the vertical direction are laid out in a staggered grid pattern shifted in the horizontal direction so that the horizontal overlapping portion a does not continue in the vertical direction. Accordingly, the maximum number of overlapping sheets is three, which is the portion where the vertical overlapping portion b and the horizontal overlapping portion a intersect. In addition, as shown in FIG. 7, the overlapping portion c at the top of the flat ridge portion overlaps the ridge core by 100 mm or more, and is doubled, so that a total of 200 mm or more is overlapped.

Next, in order to lay the solar battery panel A on the gabled roof shown in FIG. 8 on the waterproof sheet 1, the solar cell panel A is directed to a lower side than a high side (ridge side) and a left side. To the right, ie, in the order of the numbers shown. In the case of a ridge roof, the number of parallels differs between the top and bottom, but the construction order is the same. This is the reverse order of the case of the waterproof sheet 1. As shown in FIGS. 2 and 3, the uppermost solar cell plate A is inserted into the ridge fitting 19 on the water side, and the lower right and left two fixed brackets 11, 11 are nailed to the base plate 18 with special nails 13. And fix it.

First, as shown in FIGS. 9 and 10, the solar cell plates A of the second and subsequent stages are provided with a hook portion 14 integrally provided on the upper end side of the backup material 10 and the upper solar cell plate. The plate A is connected to an engaging portion 15 formed on the lower end side of the backup material 10 via a joint member 16 (see FIG. 3). Then, the fixing brackets 11 and 11 are attached and fixed on the waterproof sheet 1 using the special nails 13 in the same manner as in the case of the upper solar cell plate A, and the upper and lower adjacent solar cell plates A and A The portions other than the solar cell module 7 are laid in a slightly overlapping state.

As shown in FIGS. 9 and 11, a flat cable extending in the direction of the girder is led into the opening 20 formed in the base plate 18 at a location near the upper end in the flow direction of the ridge fitting 19 in the ridge portion. The metal cable 21 is attached with waterproofing treatment, and the power cable 17 in which the lead wires of each solar cell plate A are put together is passed from the cable fitting 21 to the field board 1.
8 and taken indoors, junction box 2 mounted on the wall
Connect to 2. Incidentally, the connection box 22 includes the inverter 2
The power distribution board 30 is connected via the power switch 9. The cable lead-in fitting 21 is covered with an upper lid 23 having an opening only on the lower side in the flow direction, and an upper side thereof is covered with a water-absorbing plate 24.

As described above, when the solar cell board A is constructed, since the construction worker walks on the waterproof sheet 1, the stepping force concentrates on the waterproof sheet 1 located at the step portion 12 a of the existing flat roof tile 12, and the stress concentrates. Or the waterproof sheet 1 of the step lower portion 12b may be pulled. In the conventional waterproof sheet 1 ', as shown in FIG.
Tear and the portion located at the step lower side portion 12b have a tear y. However, such a tear does not occur in the waterproof sheet 1 of the present application in which the tensile strength and the elasticity are improved.

Since the existing flat roof tile 12 and the solar cell plate A have different dimensions in the flow direction and the mounting pitch, the fixing bracket 11 of the solar cell plate A straddles the step portion 12a as shown in FIG. May be placed in a state. In such a case, in the conventional waterproof sheet 1 ', as shown in FIG. 14, the impact caused by the driving of the special nail 13 causes the portion located at the step portion 12a or the portion located at the step lower portion 12b as shown in FIG. In addition to the occurrence of tearing, the elasticity was not sufficient, so that the shape of the flat roof tile 12 as the base was almost as it was, and the bracket fixing surface was in a state of poor stability such as floating in the air, There was a problem that it was difficult to obtain sufficient mounting strength.

On the other hand, when the waterproof sheet 1 of the present invention is used, since it is strong against impact and rich in elasticity, as shown in FIG. Will be able to secure. Since the dents can be sufficiently deformed by the excellent elastic properties, the steps of the flat roof tile 12 are absorbed and alleviated, and the fixing bracket 1 on the waterproof sheet 1 is removed.
The upper surface of the place where the base 1 is crimped can be made closer to a flat state, and the grounding state of the fixing bracket 11 can be stabilized and sufficient mounting strength can be obtained.

[Alternative Embodiment] Waterproof sheet 1 as a roofing material
May be obtained by impregnating a synthetic fiber nonwoven fabric other than felt with rubber asphalt, and a sheet obtained by reinforcing a synthetic fiber nonwoven fabric with a mesh may be used. Further, the fiber reinforced layer constituting the waterproof sheet 1 and the elastic material provided with the same can be variously changed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing the structure of a waterproof sheet according to the present invention.

FIG. 2 is a perspective view showing a solar cell plate.

FIG. 3 is an exploded perspective view of a solar cell plate.

FIG. 4 is a perspective view showing a double roofing state of a solar cell plate on a building roof;

FIG. 5 is a perspective view showing a state in which a waterproof sheet is laid on a flat tile;

FIG. 6 is a perspective view showing an overlapping state of the prevention sheets.

FIG. 7 is a perspective view showing a stacked state of prevention sheets in a ridge portion.

FIG. 8 is a diagram showing a sequence of mounting solar panels on a gable roof;

FIG. 9 is a system diagram showing an overview of a power cable routing state;

FIG. 10 is a cross-sectional view showing a mounting structure of solar cell plates adjacent to each other in the flow direction.

FIG. 11 is a perspective view showing the structure of an indoor lead-in portion of a power cable.

FIG. 12 is a sectional view showing the structure of a conventional waterproof sheet.

FIG. 13 is a view showing a state of occurrence of tearing of a conventional waterproof sheet.

FIG. 14 is a diagram showing a fixed bracket mounting state in a conventional step portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waterproof sheet 2 Fiber reinforcement layer 2a Reinforcement material 3 Elastic material 7 Elastic material 12 Flat roof tile A Solar cell board Y Roof

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kensuke Ishida 2-47, Shishitsuhigashi 1-chome, Namiwa-ku, Osaka-shi, Osaka F-term (reference) 2E108 KK01 LL01 NN07 5F051 BA03 JA09

Claims (2)

[Claims] 1. A waterproof sheet made of an elastic material provided with a fiber reinforcing layer is laid on an existing roof on which flat tiles are laid,
A method for mounting a solar cell plate, wherein a solar cell plate provided with a solar cell is overlaid on the waterproof sheet. 2. A waterproof sheet comprising the rubber asphalt laminated on both sides of a fiber reinforced layer formed by impregnating an elastic material made of rubber asphalt containing blown asphalt with a reinforcing material made of a synthetic fiber non-woven fabric. The method for mounting a solar cell plate according to claim 1, wherein: