JP4070626B2 - Roof material integrated solar cell module - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roof material integrated solar cell module in which solar cells are mounted on a flat roof material block.
[0002]
[Prior art]
As the roofing material integrated solar cell module mentioned above, a solar cell is mounted on the upper surface of a horizontal roofing material block (flat tile), and the solar cell is output via an output cable drawn from the solar cell to the rear edge side of the roofing material. There is a known configuration in which a photovoltaic power generation system is constructed by wiring in series and in parallel between battery modules and an output bus cable (wiring cable) leading to a power conditioner (for example, , See Patent Document 1 and Patent Document 2.)
[0003]
Next, the structure of the above-described roof material integrated solar cell module and the wiring structure between the modules will be described with reference to FIGS.
[0004]
In FIG. 5, 1 is a flat roofing material block (tile) made of cement, mortar, metal material, reinforced plastic or the like, and 2 is a solar cell. Here, the solar cell 2 is composed of a single crystal, polycrystalline silicon, or amorphous silicon solar cell element made of a surface protective material (for example, a fluorine-based resin film such as ETFE) or a sealing material (for example, EVA (ethylene vinyl acetate). A film substrate type thin film solar cell sealed with a copolymer)), and an output terminal box 3 is attached to the center of the back surface of the thin film solar cell, and a positive electrode (+), connected to the output terminal of the solar cell 2 from the output terminal box 3 The negative output cables 4 and 5 are pulled out, and the connectors 4a and 5a are attached to the output cables 4 and 5, respectively.
[0005]
On the other hand, the roofing material block 1 has recesses 1a and 1b for housing the solar cells 2 and the output terminal box 3 on its upper surface side, and the housing terminal recess 1b of the output terminal box and the rear edge (ridge side) of the roofing material 1. A wiring groove 1c for accommodating the output cables 4 and 5 is formed therebetween, and the solar cell 2, the output terminal box 3 and the output cables 4 and 5 are inserted therein and joined with an adhesive such as silicone. Yes. In addition, 1d is a sleeve-shaped flange part for lap-joining with an adjacent roofing material block, 1e is a through-hole of the nail which fixes the roofing material block 1 to the roof base plate.
[0006]
Next, a wiring structure for constructing a photovoltaic power generation system by laying a plurality of roof material-integrated solar battery modules as described above on the roof of a building and its wiring work will be described with reference to FIG.
[0007]
That is, the input voltage of the power conditioner (inverter) that converts the direct current output of the solar cell 2 into alternating current and is linked to the commercial power system is generally about DC 200V. On the other hand, the output voltage per sheet of roof tiles with solar cells installed on the roof of a residential building varies depending on the size of the roof tile. Therefore, as shown in FIG. 6, in a state where a plurality of roofing material integrated solar cell modules (tiles with solar cells) 6 are laid in an array, a predetermined number (the output voltage per solar cell) The connectors 4a and 5a of the output cables 4 and 5 drawn from each solar cell 2 are connected between the solar cells 2 (represented by # 1 to # 4) of the modules arranged side by side in units of 4 for 50V. A module block is configured in which the solar cells # 1 to # 4 are connected in series to increase the output voltage to 200V. Next, the positive and negative output bus cables 7 and 8 are laid on the ridge side along the row of the solar cell modules 6 that are lined up in an array, and then the solar cells 2 ( The connectors 4a and 5a of the + and -pole output cables 4 and 5 drawn from the # 1 and # 4) to the rear edge (ridge side) are connected in parallel to the branch connector 9 of the output bus cables 7 and 8 in parallel. To do. For the solar cell modules in each row that lay side by side from the eave to the ridge, after performing the same wiring work as described above, the ends of the output bus cables 7 and 8 in each row are aggregated in a connection box, and the power condition is set. Connect to na.
[0008]
In addition to the wiring structure described above, a connector for cable connection is provided in the output terminal box of the solar cell module, and the connection cable with the connector branched from the output wiring cable laid on the building side is connected to the output terminal of the solar cell module. A wiring structure connected to a box is also known (see, for example, Patent Document 3).
[0009]
[Patent Document 1]
JP 2002-9326 A (FIGS. 7 and 9)
[Patent Document 2]
JP-A-10-135499 (FIGS. 1 and 2)
[Patent Document 3]
JP 2000-68547 A (FIGS. 1 and 9)
[0010]
[Problems to be solved by the invention]
By the way, when the above-mentioned roof material integrated solar cell module is installed on the roof of a house and the output cable and output bus cable are routed to the ridge side to connect the modules in series and in parallel, the construction surface However, there are the following problems.
[0011]
That is, when the solar cell modules 6 for one row are laid down in order from the roof eave side to the ridge side, separately from the output cables 4 and 5 attached to the solar cells 2 of each module (see FIG. 5). The output bus cables 7 and 8 are routed to the ridge side, and the modules and between the module and the output bus cables 7 and 8 are wired in series and in parallel, and this wiring work is performed for each row. This is performed in parallel with the laying of the material block 1.
[0012]
In this case, the roofing material block is laid and wired in a narrow environment on a sloped roof, so if the cables are routed randomly on the work platform, the cables are connected to the workers' feet. There is a risk of falling over. In addition, when the roofing material block 1 is laid on the roof baseboard and nailed, the wiring cable laid on the ridge side along the module row one step below is hidden behind the roofing material block and cannot be seen. If it is laid directly under the nailing position, the cable may be damaged by nailing.
[0013]
The present invention has been made in view of the above points. The object of the present invention is to solve the problems described above, and to install a large number of modules on the roof of a house, etc., and to provide wiring to build a photovoltaic power generation system. An object of the present invention is to provide an improved roofing material integrated solar cell module so that the construction work can be safely performed.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a solar cell is provided on the upper surface of the roofing material block, and a plurality of the batteries are arranged in an array and laid on the roof surface, along the ridge side. In the roof material integrated solar cell module for constructing a photovoltaic power generation system by connecting the solar cells in series or in parallel to the laid wiring cable,
A cable clamp member that holds the wiring cable along the roof material block is attached to the rear edge of the roof material block, and the cable clamp member is an independent part and is attached to and detached from the rear edge of the roof material block. It is assumed that the detachable attachment portion is formed with a bifurcated claw-shaped leg piece that is locked from above and below to a water return stepped portion formed at the rear edge of the roofing material block. (Claim 1).
[0015]
As described above, the wiring cable routed to the ridge side along the row of solar cell modules installed on the roof is fixed to the rear edge of the roofing material block by the cable clamp member, so that the wiring cable obstructs the construction. Therefore, it is possible to secure a sufficient work scaffold on the roof and to safely install and wire the solar cell module. In addition, since the distribution cable is fixed at a position along the rear edge of the roofing material block, the cable must be attached when nailing another roofing material block that is laid on the ridge side on the roof plate. Construction reliability can be improved without fear of damage.
[0016]
Moreover, the said cable clamp member shall be specifically comprised in the following aspects.
[0017]
(1) a cable clamp member is a resin molded article integrally molded mounting portion and the cable holding portion for engaging the trailing edge of the roofing material block (claim 2).
[0018]
(2) In the cable holding part of the cable clamp member in the previous section (1) , a cable fitting groove having a C-shaped or U-shaped cross section with a part of the peripheral surface cut away is formed, and the wiring cable is inserted and fixed in this groove. (Claim 3 ).
[0019]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on the examples of FIGS. In the drawing of the embodiment, members corresponding to those in FIG.
[0020]
First, FIG. 1 and FIG. 2 show the overall structure of a roof material integrated solar cell module according to an embodiment of the present invention. That is, the solar cell module of the illustrated example is basically the same as the structure of FIG. 5, but the cable clamp member 10 is additionally provided on the rear edge side of the roofing material block 1 and behind the roofing material block 1 (ridge side). Wiring cables (output bus cables, etc.) 7 and 8 laid along the cable are fixed to the clamp member 10.
[0021]
Here, the cable clamp member 10 is a resin molded product having excellent elasticity and weather resistance, such as polypropylene, and has a bifurcated claw-shaped leg pieces 10a-1 and 10a-2 as shown in FIG. 3 or FIG. A cable holding portion 10b having a portion 10a and a cable fitting groove 10b-1, 10b-2 having a C-shaped cross-section with a part of the peripheral surface cut away, or a cable fitting groove 10b-3 having a U-shaped cross-section. Are integrally formed.
[0022]
In order to attach the cable clamp member 10 having the above configuration to the roofing material block 1, the above-mentioned bifurcated leg pieces 10a-1 and 10a-2 are fitted into the rear edge of the roofing material block 1 and formed at the edge. The leg piece claw is hooked and fixed to the water return stepped portion 1f (see FIG. 2). In the illustrated example shown in FIG. 1, the three cable clamp members 10 are mounted in a distributed manner on the left and right, but the mounting position and number of the cable clamp members 10 are appropriately selected according to the situation at the construction site. And
[0023]
Further, the + and − pole wiring cables 7 and 8 laid and laid on the ridge side of the module are inserted into the cable fitting groove of the cable clamp member 10 so as to be fitted, and as shown in FIG. After being fixedly supported along the rear edge, it is branched and connected to the + pole and −pole connectors of the output terminal box 3 provided in the solar cell module. Here, in the cable clamp member shown in FIG. 3, the two wiring cables 7 and 8 are inserted into the cable fitting grooves 10b-1 and 10b-2 having a C-shaped cross section lined up and down separately. FIG. 4 shows a cable clamp member applied when a flat two-core cable is used as a wiring cable. The flat two-core cable is fitted into a cable fitting groove 10b-3 having a U-shaped cross section and fixed.
[0024]
As described above, the wiring cable laid on the ridge side along the row of solar cell modules arranged in an array and installed on the roof is arranged via the clamp member 10 so as to follow the rear edge of the roof material block 1. By fixing, the distribution cables that have been routed in a messy manner are arranged in an orderly manner. Thereby, the work scaffold on a roof can be ensured and the installation of a solar cell module and wiring work can be performed safely. In addition, there is no risk of damaging the wired cables when the next roofing material block is applied to the ridge side of the installed module and nailed to the base plate.
[0025]
【The invention's effect】
As described above, according to the present invention, the cable clamp member for holding the wiring cable along the roof material block is attached to the rear edge (ridge side) of the roof material block of the roof material integrated solar cell module. The cable clamp member is an independent part and is detachably attached to the rear edge of the roofing material block. The detachable attachment part has a water return formed on the rear edge of the roofing material block. By forming bifurcated claw-shaped leg pieces to be locked from above and below on the stepped portion, it is possible to secure a sufficient work scaffold on the roof without disturbing the construction of the wiring cable. Installation and wiring work can be performed safely. In addition, since the distribution cable is fixed at a position along the rear edge of the roofing material block, the cable must be attached when nailing another roofing material block that is laid on the ridge side on the roof plate. Construction reliability can be improved without fear of damage.
[Brief description of the drawings]
1 is a structural perspective view showing a state in which wiring is applied to a roofing material integrated solar cell module according to an embodiment of the present invention. FIG. 2 is a sectional view taken along line XX in FIG. FIG. 4 is a perspective view of a configuration of a cable clamp member having a shape different from that of FIG. 3. FIG. 5 is an exploded perspective view showing a structure of a conventional roofing material integrated solar cell module. Explanatory diagram showing installation and wiring structure corresponding to the roofing material integrated solar cell module
DESCRIPTION OF SYMBOLS 1 Roof material block 1f Water return step part 2 Solar cell 3 Output terminal box 6 Roof material integrated type solar cell module 7, 8 Wiring cable 10 Cable clamp member 10a Mounting part 10a-1, 10a-2 Leg piece with nail 10b Cable Holding part 10b-1, 10b-2, 10b-3 Cable fitting groove

Claims (3)

The solar cell is arranged on the top surface of the roofing material block. A plurality of the solar cells are arranged in an array and laid on the roof surface. The solar cells are connected in series and in parallel to the wiring cable laid along the ridge side. In the roofing material integrated solar cell module that is configured to build a photovoltaic power generation system,
A cable clamp member that holds the wiring cable along the roof material block is attached to the rear edge of the roof material block, and the cable clamp member is an independent part and is attached to and detached from the rear edge of the roof material block. The detachable attachment part is formed with a bifurcated claw-shaped leg piece that is locked from above and below to a water return stepped part formed at the rear edge of the roofing material block. The roof material integrated solar cell module. The solar cell module according to claim 1 , wherein the cable clamp member is a resin-molded product in which a mounting portion fixed to a rear edge of the roof material block and a cable holding portion are integrally molded. Solar cell module. The solar cell module according to claim 2 , wherein a cable fitting groove having a C-shaped or U-shaped cross section is formed in the cable holding portion of the cable clamp member by cutting out a part of the peripheral surface and fitting and holding the wiring cable. A roof material integrated solar cell module.

Images