JP2001349019A - Roof structure - Google Patents

Abstract

(57) [Summary] Roof structure [Problem] To increase the mechanical strength of the eaves side of a solar cell installation roof and to prevent the re-freezing (stagnation) phenomenon of snowmelt water. One end is loosely fitted between a rail overhang of a solar cell module at an end of an eave and a rail, and a field plate surface at a tip of the eave from substantially the same height as the upper surface of the solar cell module at this fitting portion. A slope-shaped overhang is constructed over the height of the eaves, and the eaves on the back side of this overhang are fitted with a heater to handle the eaves-side fitting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof structure on which a solar cell is installed, and more particularly to a technique for preventing the melting of snowmelt water on the eaves side and improving the strength of the eaves side end of the solar cell. Things.

[0002]

2. Description of the Related Art Recently, as represented by photovoltaic power generation,
The spread of alternative energy has been remarkable, and the number of solar modules installed on the roofs of ordinary houses has been increasing each year. When a solar cell module is installed on a roof of a house, a method of constructing a solar cell array directly on a ground plate without using a tile is becoming the mainstream in recent years because of its excellent design and high reliability. This is called a building material integrated type, and has been highly evaluated by the market as superior to the former method in both appearance and reliability. In this integrated construction material structure, a flow direction aluminum rail is mounted on a base plate of a detached house, a plurality of solar cell modules are mounted on this, and a solar cell array is constructed. Attach an accessory to each side and complete. This will be briefly described with reference to FIGS. 3, 4, and 5. FIG. FIG. 3 shows a “gable type” in which roofs 52 are deployed on both sides around a ridge 50.
Represents the structure of A waterproof sheet 56 is stuck on the field plate 54, and a plurality of rails 58 are installed thereon at a predetermined interval from the ridge 50 toward the eaves, and a plurality of solar cell modules are provided across at least two rails. 60 is attached. With such a structure, the solar cell module 60 can function as a roof material and can achieve excellent design. Solar cell module 60
Has a structure in which a silicon solar cell is sealed on a glass plate with a filler such as EVA, and aluminum frames are attached to four sides. Then, as shown in FIG. 4, the frames 60a, 60b of the adjacent solar cell modules 60, 60 abut each other, and have a waterproof function against rainwater or the like by meshing with each other. Normally, the solar cell module 60 is installed in the central portion on the south side, but the ridge side and the eaves side are provided with an edge treatment material 62 called an accessory, as shown in FIG.
For the accessory 62, a sheet metal material is usually used, and the ridge side and the eaves end are processed in various shapes. The accessory 62 prevents water and foreign matter from entering the ridge and eaves.

[0003]

However, in the case of such a building material integrated type, particularly in a snowy area, a phenomenon called "pulling" occurring on the eaves side becomes a serious problem.
This phenomenon is that the snow on the roof melts once and freezes again on the eaves. Snow is easier to melt on the installation surface of the solar cell module than in the area where the solar cell module is not installed. With a small amount of snow, the snow easily melts even at low ambient temperatures and flows toward the eaves. In the building material integrated structure, there is a space between the base plate 54 and the solar cell module 60, and a through hole (not shown) for wiring material from the solar cell module 60 is opened in the base plate 54, so that the indoor The warm air flows into the space, and the snow melting phenomenon is promoted. However, since the snow melting effect does not work on the eaves front side, the water that has once melted and flowed is cooled again and freezes. FIG. 5 shows an enlarged structure on the eaves front side. In particular, the portion of the accessory 62 is easily cooled, and an ice block re-freeze is formed in this portion. This is a shy phenomenon.

[0004] When the shrinking phenomenon occurs, the accessory 62 on the eaves side and the end of the solar cell module 60 are deformed by the weight of the re-ice ice mass. Therefore, intrusion of water or foreign matter cannot be prevented, and the reliability of the entire roof is significantly reduced. Such a phenomenon is most remarkable in a snowy area, but even if the amount of snowfall is small, if the roof area is large, the amount of water flowing to the eaves is large, so that the phenomenon of swallowing cannot be ignored. There is also a problem with the eaves structure itself. That is, the eaves end of the solar cell module 60 has nothing to engage with the frame 60a as shown in the figure, so that the load concentrates on one frame, and becomes weaker against the load from above. . This is especially important in heavy snowfall areas. In addition, ice blocks due to swamping fall when they cannot withstand their own weight, which is extremely dangerous if there is a person underneath.

[0005] As described above, although the shrinking phenomenon also occurs on a general roof, it is attracting attention as a phenomenon to be noted particularly in heavy snowfall areas, in the integrated construction material structure, in combination with the promoting effect of the warm air inflow effect in the room. .

Further, another problem has been pointed out in the above-mentioned conventional eaves structure. As shown in FIG. 6, a step is inevitably formed between the eaves edge of the solar cell module and the accessory 62, so that all rainwater does not flow into the gutter 64. This is particularly remarkable when the amount of precipitation is large, and the rainwater flowing on the surface of the solar cell module 60 jumps at a stepped portion with the accessory 62 and scatters to the outside of the gutter 64 with excessive force. Responsible. The reason for this step difference is that the water stopper piece 66 must be used as a fixing member for the accessory because the frame 60a of the solar cell module 60 needs to have a butt structure.

[0007] As described above, the conventional solar cell installation roof having a building material integrated structure has various problems as described above, particularly at the eaves.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and aims to increase the mechanical strength of the eaves side and to prevent the swallowing phenomenon itself. The above issues are
In a roof structure in which a plurality of rails are installed on a base plate at predetermined intervals from a main house toward a eaves direction and a plurality of solar cell modules are attached across at least two rails, a solar cell at an end of the eaves side One end is loosely fitted between the frame overhang of the module and the rail, and a slope-like stretch extends from approximately the same height as the upper surface of the solar cell module at this fitting to the height of the base plate surface at the eaves tip. The problem can be solved by providing a roof structure in which a protrusion is configured, and the eave-side member is provided with a heater attached to the back surface of the overhang so that the eave-side fitting is processed.

Next, the operation of the above means for solving the problem will be described. One end is loosely fitted between the overhang portion of the solar cell module frame at the eaves end and the rail, so that even if a load is applied to this portion from above, the solar cell module frame The load does not concentrate only on By forming the slope-shaped overhang from the height approximately equal to the top of the solar cell module at the fitting part to the height of the base plate surface at the tip of the eaves, the step at this part is eliminated and rainwater jumps Disappears. And the structure in which the heater is attached to the back surface of the overhanging portion functions to surely melt the plowing.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 are sectional views showing examples of the eaves tip structure of the present invention. The figure shows a roof structure in which a plurality of rails 13 are installed at predetermined intervals from a ridge to a eaves on a base plate 11 and a plurality of solar cell modules 15 are attached across at least two rails. One end is loosely fitted between the frame overhang portion 15a of the solar cell module 15 at the eaves front end and the rail 13, and the height of the eaves tip is set at substantially the same height as the upper surface of the solar cell module at the fitting portion 17. A slope-shaped overhanging portion 19 is formed over the height of the main plate surface, and a roof structure in which the eaves-side fitting is processed by an eaves-side member 23 having a heater 21 attached to the back surface of the overhanging portion 19 is shown.
The details will be described below. One end of the eaves member 23 is loosely fitted into the recess 25 formed between the frame overhang 15a of the solar cell module 15 at the eaves end and the rail 13. The eaves member 23 which is the fitting portion 17
Is connected to the frame (15
Since the structure is such that it can be fitted in abutting condition with a), the upper surface of the fitting portion 17 and the protruding end 15b of the frame extension 15a are in contact (part A). On the other hand, a lower portion of the fitting portion 17 is fixed so as to ride on the rail protruding end 13a, and is provided with a rising piece 23a having the same shape as the drain piece 60c of the frame 60b shown in FIG. This is the drainer 6
It has a function equivalent to 0c. Further, a positioning piece 23b for the rail 13 is provided.

The height of the fitting portion 17 is substantially the same as the upper surface of the solar cell module, that is, the extension from the upper surface (B) of the fitting portion 17 rises to the same height as the upper surface of the solar cell module. A slope-shaped overhang 19 is formed over the height of the base plate surface.
In the illustrated example, the overhang portion 19 is formed integrally with the fitting portion 17, and the strength is secured. Overhang 19
A gap is provided between the tip of the base plate and the base plate 11 so as to absorb at least the error.

A heater 21 is mounted on the back surface of the overhang 19. The heater 21 is suitably in the form of a sheet, and in the example shown in FIG.
Has a planar structure capable of heating the entire surface of the device. Since the warming occurs in the overhang portion 19, the heater 2
1 reliably prevents the squirting. As the planar heater 21, a general heater subjected to a waterproof treatment may be used. How long the planar heater 21 is attached to the elongate length of the eaves may be determined individually based on the climatic conditions of the installation location and the heat conduction of the overhang 19. It is desirable that the eaves tip member 23 be made of an extruded aluminum product from the viewpoint of heat conduction and strength. In the example of this figure, a hanging piece 23c is provided below the fitting portion 17. Therefore, water does not enter from the gap between the solar cell module 15 and the base plate 11. In this waterproof structure, since the hanging piece 23c is made robustly by integral molding, and the overhanging portion 19 is at the forefront, the waterproof performance is dramatically improved as compared with the conventional accessory 62. With the conventional accessory 62, it has been difficult to exhibit a stable waterproof function for a long period of time due to turning up due to a strong wind blown to the eaves side. According to the present invention, the eaves side can be finished with the same mechanical strength as that of the structure in which the solar cells are butted together, and the action of the heater can reliably prevent the egress.

Further, as shown in FIG. 2, since there is no step between the upper surface of the solar cell module 15 and the overhanging portion 19 and a smooth linear structure is formed, the rainwater jump phenomenon is eliminated and all the rainwater is drained. Can be recovered from Also, the design is excellent.

[0014]

As described above, in the roof structure of the present invention, one end is loosely fitted between the rail extension of the solar cell module at the eaves end side and the rail, so that this portion is provided. Even if a load is applied from above, the load does not concentrate only on the frame of the solar cell module as in the related art, so that deformation of the frame due to snow accumulation or walking of a person during maintenance can be reliably prevented. By forming the slope-shaped overhang from the height approximately equal to the top of the solar cell module at the fitting part to the height of the base plate surface at the tip of the eaves, the step at this part is eliminated and rainwater jumps , All of the rainwater on the roof can be collected by the gutter. The structure in which the heater is attached to the back surface of the overhanging portion functions to surely melt the steaming, so that there is no danger of deformation of the eaves portion due to the steaming and falling of ice blocks due to the steaming. Furthermore, by eliminating the steps in the eaves portion, a smooth continuous linear appearance is obtained, and the design is also excellent. Since such an effect is obtained, the roof structure of the present invention is excellent in a solar cell installation roof of a building material integrated system.

[Brief description of the drawings]

FIG. 1 is a partial view of an eave for explanation of a roof structure according to the present invention.

FIG. 2 is a partial view of an eave for explanation of a roof structure according to the present invention.

FIG. 3 is an overall explanatory view of a roof having a conventional structure.

FIG. 4 is an explanatory view showing a butted portion of a solar cell module.

FIG. 5 is a partial view of an eaves for explanation of a conventional roof structure.

FIG. 6 is a partial view of an eave for explanation of a conventional roof structure.

[Explanation of symbols]

11, 54 Field board 23c Hanging piece 13, 58 Rail 25 Depression 15, 60 Solar cell module 50 building 15a Frame overhang 52 Roof 15b Protruding end 56 Waterproof sheet 17 Fitting portion 60a, 60b
Frame 19 Overhanging part 60c Drain piece 21 Heater 62 Special object 23 Eaves tip member 64 Gutter 23a Rising piece 66 Water retaining piece 23b Positioning piece

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Claims (1)

[Claims] 1. A roof structure in which a plurality of rails are installed on a base board at predetermined intervals from a main house toward an eaves edge and a plurality of solar cell modules are attached across at least two rails. One end is loosely fitted between the rail overhang of the frame of the solar cell module at the side end and the rail, and the height of the eaves tip field plate surface from substantially the same height as the upper surface of the solar cell module at this fitting part A roof structure in which a slope-shaped overhang is formed, and the eave-side member is provided with a heater attached to the back of the overhang, and the eaves-side fitting is processed.