JPH035603Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a new snow-melting roof tile that utilizes a carbonaceous film formed on the surface of an oxidized roof tile as a heating resistor.

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

As examples of such snow melting methods, methods that use water and methods that use electric heat are widely known, and an example of the latter is a method in which a heating element made of nichrome wire or iron-chrome wire is embedded in a roof tile. is being proposed. However, since the thermal conductivity of the tile main body is low and the thermal efficiency is poor, the required power consumption is excessive, and it is difficult to say that this is practical.

In order to solve this problem, the applicants previously proposed, in Utility Application No. 107596/1983, a structure in which a low heat generation and resistance film was applied to the top surface of an ordinary tile. Since the coating was configured to come into direct surface contact with the snow on the roof tiles, thermal efficiency could be improved, but the problem was that it required an additional process to apply the low heat generation resistant coating, resulting in high costs. remained.

Purpose of the invention Therefore, the purpose of this invention was to take into account the actual state of the prior art and focus on the fact that the carbonaceous film uniformly formed on the surface of oxidized roof tiles acts as a low heat generating antibody. By doing so, it is an object of the present invention to provide a snow-melting roof tile that has high thermal efficiency, requires little power consumption, and does not require an additional step of applying a low heat generation resistant coating.

Structure of the invention The structure of this invention to achieve the above object is to embed a pair of conductive electrodes in the upper surface of the oxidized tile, which are electrically connected to the carbonaceous film uniformly formed on the surface of the oxidized tile. The gist of the present invention is that the carbonaceous membrane can function as a heat-generating antibody by supplying electricity to the carbonaceous membrane.

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

The snow-melting roof tile 1 is made up of a pair of conductor electrodes 5, 5 buried in the upper surface of an oxidized roof tile 1a (FIG. 1).

Ibushi tile 1a is made by firing the base 2, and then
It is smoked at 1000°C in the presence of hydrocarbon gas to form a carbonaceous film 3 on the surface of the substrate 2 (second
(Figure), this tile has a unique silver color.

The pair of conductive electrodes 5, 5 are arranged on the upper surface of the snow-melting roof tile 1, on both sides of the area where the left and right tiles do not overlap when the roof is covered, from the top end to the bottom end in the vertical direction. (Figure 1).

The conductor electrode 5 is buried in the dovetail groove 4a, has a rectangular cross section with a longer side larger than the opening width BA of the dovetail groove 4a, and is disposed in a posture parallel to the bottom of the groove 4a. Figure 2). However, after the conductor electrode 5 is placed in the dovetail groove 4a formed in the base 2 of the oxidized tile 1a, it is fired and smoked.
By forming the carbonaceous film 3 uniformly over the entire surface,
Electrical continuity between the conductive electrode 5 and the carbonaceous film 3 is ensured.

The material of the conductor electrode 5 needs to be one that does not chemically or physically change even at the firing temperature of the oxidized tile 1a, so a nichrome wire for electric heating is preferable.

The conductor electrode 5 protrudes from the upper end of the snow-melting roof tile 1 and is extended to form an extended conductor electrode 5a (FIG. 3).

The snow-melting roof tile 1 having such a configuration includes conductor electrodes 5,
When electricity is applied to the carbonaceous membrane 3 through the carbonaceous membrane 5, the carbonaceous membrane 3 generates heat as a heat-generating antibody, so that the snow accumulated on the tiles can be efficiently melted.

Here, since the conductor electrode 5 is buried in the upper surface of the snow-melting roof tile 1, the low resistance value of the carbonaceous film 3 on the upper surface side sandwiched between the pair of conductor electrodes 5, 5 is the same as that of the pair of conductor electrodes. 5 and 5, it is smaller than the low resistance value of the carbonaceous membrane 3 formed detouring to the lower surface side, and therefore, the calorific value of the carbonaceous membrane 3 on the upper surface side of the snow-melting roof tile 1 is It is larger than that on the bottom side.
Therefore, when energizing the snow-melting roof tile 1,
The upper surface that comes into contact with the snow mainly generates heat, which greatly helps improve thermal efficiency. In addition,
In order to prevent the lower surface side of the snow-melting roof tile 1 from generating any heat, a cut may be made in the carbonaceous membrane 3 on the lower surface side and the carbonaceous membrane 3 on the lower surface side may be separated electrically. As explained above, even if the carbonaceous films 3 on both sides are energized at the same time, heat is mainly generated on the upper surface side, so this is not necessarily necessary.

Further, the conductor electrode 5 has an opening width BA of the dovetail groove 4a.
Since it has a rectangular cross section with larger long sides, there is little risk of it inadvertently coming off the dovetail groove 4a even if thermal deformation or external force is applied during the firing/smoking process.

When arranging the snow-melting roof tiles 1 on a roof, the conductor electrodes 5, 5 are extended conductor electrodes 5a, 5a.
It is connected to a power source (not shown) via electric wires 6, 6 (FIG. 4).

At this time, the series of snow-melting roof tiles 1, 1... arranged on the left and right are arranged in such a way that the power supply polarity is reversed for each one, and the series of snow-melting roof tiles 1, 1 arranged vertically ... are wired so that the power supply polarities are the same.
In this way, the conductor electrodes 5, 5 adjacent to each other on the snow-melting roof tiles 1, 1 that are adjacent to each other in the vertical and horizontal directions have the same power polarity in the vertical and horizontal directions, respectively. There is no heat generation at all in the overlapped portions of the snow-melting roof tiles 1, 1 that overlap on the left and right, and heat generation in areas that do not contribute to snow melting can be prevented, so the overall thermal efficiency can be improved.

Another Embodiment The conductor electrode 5 can be buried in the bottom of the inverted T-shaped groove 4b (FIG. 6).

The conductor electrode 5 has an opening width BB of the inverted T-shaped groove 4b.
It has a rectangular cross section with larger long sides, and is buried with the long sides parallel to the bottom of the inverted T-shaped groove 4b. At this time, even if the conductor electrode 5 is twisted due to thermal deformation or external force, the posture of the conductor electrode 5 is restricted by the inside of the stepped portions 9, 9 of the inverted T-shaped groove 4b. There is no risk that the conductor electrode 5 will be accidentally removed from the inverted T-shaped groove 4b, and removal of the conductive electrode 5 can be more reliably prevented than when buried in the dovetail groove 4a.

Furthermore, the space above the dovetail groove 4a or the space above the inverted T-shaped groove 4b can be filled with the conductive paste 8 (FIGS. 5 and 6).

The conductive electrode 5 is buried in the dovetail groove 4a or the inverted T-shaped groove 4b and covered with the carbonaceous film 3, and is electrically connected to the carbonaceous film 3. By being filled with
This electrical continuity can be made even more reliable. Further, since the conductive electrode 5 is fixed by being pressed by the conductive paste 8, the risk of the conductive electrode 5 coming off the groove 4a or the inverted T-shaped groove 4b can be more reliably prevented.

The conductor electrode 5 can also be extended to the lower surface side of the snow-melting roof tile 1 by passing through the through hole 7 provided in the upper part of the snow-melting roof tile 1 (FIG. 7).

The carbonaceous membrane 3 sandwiched between the pair of conductive electrodes 5, 5 below the through-hole 7 often generates heat, whereas the carbonaceous membrane 3 above the through-hole 7 is sandwiched between the conductive electrodes 5, 5. Since it is not sandwiched between the parts, the amount of heat generated there is extremely small. Therefore, when the roof is covered with snow melting roof tiles 1, there is almost no heat generation in the area that overlaps with the snow melting roof tile 1 adjacent to the top. can. Moreover, the extended conductor electrode 5a extended to the lower surface side can also be used as a binding wire for fixing the snow-melting roof tile 1.

The conductor electrode 5 extends to the lower end of the snow-melting roof tile 1.
It may be buried leaving a certain distance L (Fig. 7).
At this time, the carbonaceous film 3 in the area a distance L from the lower end of the snow-melting roof tile 1 is not sandwiched between the pair of conductor electrodes 5, 5, and therefore hardly generates heat. especially,
Since the heat generation at the lower end face is very small, it can be said that the heat generation occurs in a part that is not involved in the snow melting action.In addition, since the conductive electrode 5 does not extend to the lower end face of the snow melting roof tile 1, the carbonaceous material at the end face There is little possibility that the membrane 3 will become a starting point for peeling, and therefore it is effective in increasing the durability of the roof tile.

In any of the above embodiments, the carbonaceous film 3
In order to prevent brown spots and spots (so-called rust) that may occur over time, a silicone-based water repellent is applied to at least the top surface of the snow-melting roof tile 1, and the carbonaceous film 3 is coated with a silicone water repellent. shall be able to be mechanically protected.

Effects of the invention As explained above, according to this invention, a pair of conductive electrodes electrically connected to the carbonaceous film are embedded in the upper surface of the ibushi tiles on which the carbonaceous film is formed. By applying electricity to the tile, it is possible to generate heat by using the carbonaceous membrane as a low heat generation antibody.Moreover, the amount of heat generated by the tile is large on the top side of the tile, which is in direct contact with the snow, and on the bottom side. There is an excellent effect that the amount of power is reduced, the thermal efficiency is good, and the required power consumption is small.

In addition, since the carbonaceous film that comes with oxidized roof tiles is used as is, there is no need to add a separate process to apply a low-heat resistance film, which has the excellent effect of reducing manufacturing costs. .

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment, where Figure 1 is an overall perspective view, Figure 2 is an enlarged sectional view taken along the line X-X in Figure 1, and Figure 3 is an enlarged cross-sectional view taken along the line Y-Y in Figure 1. Line arrow sectional view,
FIG. 4 is an electrical wiring diagram in use. 5 and 6 are views corresponding to FIG. 2, respectively, showing another embodiment. FIG. 7 is a diagram corresponding to FIG. 3 showing yet another embodiment. BA...Opening width of dovetail groove, BB...Opening width of inverted T-shaped groove, L...Distance, 1...Snow melting roof tile,
1a... Oxidized tile, 3... Carbonaceous film, 4a... Dovetail groove, 4b... Inverted T-shaped groove, 5... Conductor electrode,
7...Through hole, 8...Conductive paste.

Claims (1)

[Claims for Utility Model Registration] 1. A snow-melting roof tile comprising a pair of conductive electrodes electrically connected to the carbonaceous film embedded in the upper surface of the ibushi tile on which a carbonaceous film is formed. 2. The snow-melting roof tile according to claim 1, wherein the conductive electrode is embedded in a dovetail groove and has a rectangular cross section with a longer side larger than the opening width of the dovetail groove. 3. The snow-melting roof tile according to claim 2, wherein the space above the dovetail groove is filled with a conductive paste. 4. The snow melting property according to claim 1, wherein the conductive electrode is embedded in the bottom of an inverted T-shaped groove and has a rectangular cross section with a longer side larger than the opening width of the groove. roof tiles. 5. The snow-melting roof tile according to claim 4, wherein the upper space of the inverted T-shaped groove is filled with a conductive paste. 6. Any one of claims 1 to 5 of the registered utility model claims, characterized in that the conductive electrode extends to the lower surface of the oxidized tile by passing through a through hole provided in the upper part of the oxidized tile. The snow-melting roof tile mentioned above. 7. The snow-melting roof tile according to any one of claims 1 to 6 of the utility model registration claim, wherein the conductor electrode is buried with a certain distance left to the bottom end of the oxidized roof tile. .