JPH035604Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to the improvement of a snow-melting roof tile that utilizes a carbonaceous film formed on the surface of an oxidized roof tile as a heat-generating low antibody.

Prior Art In areas with heavy snowfall, it is often necessary to remove snow from roofs in order to prevent damage to houses due to snow during the winter, but such work requires a great deal of labor. Not only that, but because they are forced to work at heights on rooftops, there is always the risk of falling.

Therefore, various snow melting means have been proposed in the past to eliminate the need for removing snow from the roof by melting the snow accumulated on the roof.

Such snow melting means include those that use water;
Types that use electric heat are widely known, and as an example of the latter, a type of embankment has been proposed in which a heating element made of nichrome wire or iron-chrome wire is installed inside the roof tile. However, since the thermal conductivity of the tile main body is low and therefore the thermal efficiency is low, the required power consumption is excessive and it is difficult to say that this is practical.

In order to solve this problem, the applicants first buried a pair of conductive electrodes electrically connected to the carbonaceous film on the upper surface of the ibushi tiles on which the carbonaceous film was formed. We proposed a snow-melting roof tile that generates heat by using this carbonaceous membrane as a low-heat antibody (Utility Application No. 59879/1983). This product has a structure in which the heat-generating low antibody is in direct surface contact with the snow on the roof tiles, so it is possible to significantly improve thermal efficiency.

Problems to be solved by the invention However, when using such conventional technology,
Since the carbonaceous film is uniformly formed over the entire surface of the oxidized tile, when electricity is applied to the conductor electrode, the carbonaceous film is energized not only on the top surface of the tile, but also on the entire bottom surface, so that snow and Non-contact parts, i.e.
When tiles are placed on a roof, the areas where they overlap and become underneath other adjacent tiles, as well as the bottom surface of the tiles, also become heat generating areas, so it is important to make effective use of heat in these areas. However, there was still room for improvement in terms of thermal efficiency.

Therefore, in view of the current state of the prior art, the purpose of this invention is to divide the carbonaceous film formed on the surface of the oxidized tile and limit the heat generating area of the carbonaceous film, thereby improving the surface area that comes into contact with snow. To provide a snow-melting roof tile that can effectively generate heat and further improve thermal efficiency.

Means for Solving the Problems The structure of this invention to achieve the above purpose is to apply an electrically insulating glaze to the base of the ibushi tile on which a carbonaceous film is formed to separate the carbonaceous film. A dividing line is created by baking and adhering the
The gist is that the heat generating area on the tile surface is limited to only the required areas.

Effect: According to the above structure, the carbonaceous membrane that becomes a low heat generating antibody is divided by division lines made of electrically insulating glaze, and the heat generating area is brought into direct contact with the snow on the roof tiles. It is possible to effectively prevent current flow to other parts and the resulting heat generation by limiting the current flow to only the surface.

Example Examples will be described below with reference to the drawings.

The snow-melting roof tile forms a division line 20 on the top surface of the oxidized tile 1 by baking and depositing glaze, and
A pair of conductor electrodes 10, 10 are arranged (first
figure).

The ibushi tile 1 is made by firing a base 2 and then smoking it in the presence of hydrocarbon gas at a temperature of around 1100°C to form a carbonaceous film 3 over the entire surface of the base 2. This tile has a unique silver color throughout (Figure 2).

The partition line 20 is formed by applying a glaze having electrical insulation properties in a band shape to a predetermined position on the base 2 of the oxidized tile 1, and then applying the glaze to the base 2 through a firing process. be. Therefore, the glaze is
As long as the firing temperature and melting point of the base material 2 match, and the thermal expansion coefficients of both materials are approximately the same, no special materials are required. For example, 45 parts of frit, 50 parts of feldspar, 5 parts of clay, and a coloring agent. A general version consisting of 11 parts is sufficient.

The pattern shape of the partition line 20 on the upper surface of the oxidized tile 1 is such that when it is installed on a roof, it is not covered by other roof tiles adjacent to the top and bottom or left and right and is exposed.
It is set in a large rectangular shape so as to surround as wide an area as possible on the upper surface of the oxidized tile 1 (Fig. 1).

The carbonaceous film 3 is not formed in the part where the division line 20 exists (FIG. 2), and therefore the carbonaceous film 3 is cut by the division line 20 and is not formed in the part where the division line 20 is present (FIG. 2). On both sides, a heat generating area 3a and a non-heat generating area 3b
It is divided into.

A pair of conductive electrodes 10, 10 are provided on the upper surface of the oxidized tile 1, on both sides of the inside of the rectangular pattern surrounded by the partition line 20, in the vertical direction, from the upper end to a position slightly inside the lower end. (Fig. 1).

The conductive electrode 10 is buried in a dovetail groove 4 formed on the top surface of the base 2 of the oxidized tile 1 (Fig. 2), and is resistant to thermal deformation and external force during the firing and smoking process of the oxidized tile 1. In order to prevent it from accidentally falling out of the dovetail groove 4, it has a rectangular cross section with a width larger than the opening of the dovetail groove 4. Further, the conductive electrode 10 is formed by uniformly forming the carbonaceous film 3 on the entire surface of the substrate 2 through a firing/smoking process after being attached to the dovetail groove 4. , and the heat generating region 3a are in electrical continuity. Conductor electrodes 10, 10
protrudes from the upper end of ibushi tile 1 and extends long,
When the roof is covered, it is pulled out as connection electrodes 10a, 10a for connecting to a power source (FIG. 1). At this time, the partition line 20 is extended from the rectangular pattern formed by the partition line 20 to the upper end of the oxidized tile 1 on the upper surface of the conductor electrode 10 so that the partition line 20 covers the conductor electrode 10 ( Figure 3).

Note that the material of the conductor electrode 10 is preferably a nichrome wire for electric heating because it must not be chemically or physically altered or deformed at the firing temperature of the oxidized tiles 1.

When manufacturing such snow-melting roof tiles, first,
After preparing a substrate 2 of a predetermined shape and attaching conductive electrodes 10, 10 to the dovetail grooves 4, 4, liquid glaze is applied in a band shape to draw a pattern of division lines 20 at predetermined positions on the upper surface of the substrate 2. Apply.

Thereafter, based on a general roof tile manufacturing process, for example, using a tunnel kiln, the base material 2 is fired, and the division lines 20 are vitrified with glaze. Thereafter, by batch processing, the material is smoked in a hydrocarbon gas atmosphere to form a carbonaceous film 3 on the entire surface of the base material 2, thereby obtaining an oxidized roof tile 1. At this time, the carbonaceous film 3 is also formed on the upper surface of the division line 20, but since the division line 20 has been vitrified in the previous firing process, its surface is smooth. Then, the carbonaceous film 3 is attached to the partition line 20.
The adhesion strength of is extremely low. Therefore, by lightly wiping the surface of the smoked and cooled ibushi tile 1 with a brush, the carbonaceous film 3 at the section line 20 can be easily removed and a finished product can be obtained. It is something.

Now, the roof is covered with snow-melting roof tiles, and the connection electrodes 10a, which are extensions of the conductor electrodes 10, 10, are installed.
If 10a is connected to a power supply (not shown), the glazed partition line 20 is a good electrical insulator made of glass, so the current flows through the partition line 20 of the carbonaceous film 3 formed on the entire surface of the oxidized tile 1. Only the heat generating area 3a surrounded by the pattern of lines 20 is energized. On the other hand, the non-heat generating regions 3b, 3b, . . . outside the pattern of the partition lines 20 are not energized at all. Therefore, the heat generating part of the snow-melting roof tile is limited to the exposed part of the upper surface of the oxidized roof tile 1, and the heat generated in other parts that do not come into direct contact with snow is
It can be completely prevented.

In addition, on the outside of the pattern of the partition line 20, the conductor electrodes 10, 10 are connected to the extended partition line 2.
0, the electrical conduction between the conductor electrode 10 and the carbonaceous film 3 in this part is cut off, and therefore, the electrical conduction between the conductive electrode 10 and the carbonaceous film 3 is interrupted, and therefore the non-heat generating regions 3b, 3b, . . . Electrical leakage can be effectively prevented. Furthermore, the upper end of the tile is covered by another tile adjacent to the upper side, but even if the conductive carbon film 3 is formed on the back surface of the other tile, the conductor Since the upper surfaces of the electrodes 10, 10 are covered and insulated by the partition line 20, there is no risk of an inadvertent short circuit.

Glazed partition lines drawn on the surface of snow-melting roof tiles 2
The pattern 0 is not limited to a simple rectangular shape on the upper surface of the oxidized tile 1, but may be expanded to include the side end surface 1b on the side where the chevron portion 1a is formed and touch the lower end surface 1c (the pattern shown in FIG. Figure 4). The heat generating area 3a can be expanded to the maximum range of the upper surface of the oxidized tile 1 exposed when the roof is covered. Furthermore, a partition line 20 may be provided along the periphery of the back surface of the oxidized tile 1 (FIG. 5).
Since the partition lines 20 do not appear on the surface, when the roof is covered, the risk of spoiling the overall appearance can be minimized.

In each of the above embodiments, the electrode for supplying electricity to the heat generating region 3a of the carbonaceous film 3 is the conductor electrode 1.
In addition to 0 and 10, it can take any other form. For example, an electrode made of conductive paint or metal foil may be formed on the upper surface of the carbonaceous membrane 3, and power may be supplied to the electrode using an insulated wire. It is also assumed that power can be supplied to the electrode formed between the carbonaceous film 3 and the substrate 2 by penetrating the carbonaceous film 3 .

Effects of the invention As explained above, according to this invention, an electrically insulating glaze is baked and attached to the base of the oxidized tile to divide the carbonaceous membrane and limit the heat generating area of the carbonaceous membrane. By forming division lines, the area of heat generation can be limited to only the areas most effective for snow melting, and heat generation in other areas can be effectively prevented. This has the excellent effect of further improving thermal efficiency compared to the case where electricity is uniformly applied to the membrane.

[Brief explanation of the drawing]

1 to 3 show an embodiment, FIG. 1 is an overall perspective view, and FIGS. 2 and 3 are a first embodiment, respectively.
FIG. 3 is a cross-sectional view taken along line XX and YY in the figure. Fourth
FIG. 5 and FIG. 5 are overall perspective explanatory views showing another embodiment, respectively. 1...oxidized tiles, 2...base material, 3...carbonaceous membrane, 20...compartment line.

Claims (1)

[Scope of utility model registration request] In a snow-melting roof tile in which a carbonaceous film formed on the surface of an oxidized tile is used as a heating resistor by applying electricity, the carbonaceous film is divided by baking and depositing an electrically insulating glaze on the base of the oxidized tile. A snow-melting roof tile characterized in that a partition line is formed to limit the heat generating area of the carbonaceous membrane.