JPH08209868A - Snow melting roof structure - Google Patents

Abstract

PURPOSE: To provide a snow melting roof whose maintenance is easy by laying a roof tile composed of highly heat conductive metal on a sheathing plate by arranging an air passage, arranging an air vent in an eaves edge part, and heating the tile by warm air in a room. CONSTITUTION: A roof tile 1 is formed of highly heat conductive metal such as aluminum castings on which heat conductivity at 20 deg.C is 0.15 to 10cal/ cm.S.deg and a thickness is 0.5 to 10mm. This tile 1 is laid through a tile sash bar 2 on a sheathing plate 3 on which urethane foam heat insulating board 4 is laid by arranging an air passage. An air vent 5 is arranged in an eaves edge part of the sheathing plate 3, and warm air in a room is sent under the tile 1 through a warm air introducing pipe 9 and a warm air introducing part 6, and the tile 1 is heated. A heat collecting fan is arranged in the warm air introducing pipe 9, or a heater is arranged on the tile sash bar 2, and heating of the tile 1 can be quickened. Snow on a roof is efficiently melted, and outside air is cut off in the summer period, and a cool dwelling space is formed. Therefore, a snow melting roof whose maintenance is easy can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a snow melting roof structure,
Specifically, a roof tile made of metal with high thermal conductivity is laid on the roof tile board installed on the base plate, and warm air is introduced from the ventilation holes formed at the eaves to the space between the base plate and the roof tile. The present invention relates to a snow-melting roof structure that allows warm air to pass through, has extremely high snow-melting efficiency, does not snow on the roof, and can provide a cool living space in the summer.

[0002]

2. Description of the Related Art Conventionally, people in heavy snowfall areas in winter have been obliged to remove snow accumulated on the roof by heavy labor such as shoveling in order to prevent collapse of houses due to the weight of the snow. Therefore, various snow melting roofs have been proposed in order to reduce the heavy labor of shoveling.

Specifically, a heater is laid on a roof tile or a roof plate under a galvanized iron roof to heat the roof tile or galvanized iron to melt the snow on the roof tile or galvanized iron roof.
As disclosed in Japanese Patent Publication No. 4-72812, a roof tile having a built-in electric heater and a socket for connecting a power source integrally provided on the back side is connected to a duct-shaped outlet provided on a base plate to form one of roof tiles. One that heats one to melt snow on the roof tile, as seen in Japanese Utility Model Laid-Open No. 1-73256, integrally has a heat fluid path for circulating a heated heat medium on the back surface of the roof material. It has been proposed to provide a roof snow melting device provided with a heat insulating material on the back surface of the roof material so as to cover the thermal fluid path, and circulate a heat medium to melt the snow.

[0004]

In the above-mentioned conventional snow melting roof structure, it is described that a metal roofing material is used, but all of them use an iron plate or the like, and the iron plate has a low thermal conductivity. The heat from the heat supply source was not used effectively due to snow melting, resulting in a lot of loss, poor thermal efficiency, and quick rust, which was not preferable. Furthermore, although it is described that soil tiles are used, the soil tiles also have extremely low thermal conductivity and poor thermal efficiency.

In the case of the above-mentioned conventional snow melting roof structure, in the case of, it is necessary to lay an electric heater on the whole surface of the base plate, which requires a great cost to form the snow melting roof, and when the electric heater fails. However, there is a problem that the snow cannot be melted and that the repair needs to change the roof, which requires a lot of labor and cost. In the case of, in case of failure of the electric heating roof, only the electric heating roof needs to be replaced,
It is not necessary to change the roof such as in the case of, but it is costly to manufacture electric heating roof tiles, and not only is it extremely expensive to form a snow melting roof structure,
In the case of a failure of the duct-shaped outlet, as in the case of (1), the problem arises that the roof needs to be changed. In the case of, in addition to the need for piping for circulating the heat medium, a heat exchanger, a heating device, etc., not only the cost becomes high, but also the maintenance of the piping for circulating the heat medium is required, and moreover, the piping etc. Repairing in the event of a breakdown would require similar roofing changes, which would cause similar problems.

The present invention has been made in order to solve the problems of these conventional snow melting roof structures, and has a snow melting roof structure with extremely high thermal efficiency, very few failures, and easy maintenance. It is intended to be provided.

[0007]

The snow melting roof structure of the present invention has a thermal conductivity (in the present invention, the thermal conductivity means the amount of heat flowing vertically through a unit area of an isothermal surface inside an object in a unit time,
Roof tiles made of metal with a high temperature gradient in this direction) are laid on the roof tiles provided on the base plate, and warm air is introduced from the ventilation holes formed in the eaves, Warm air is passed through the space between the base plate and the roof tiles. The warm air passed through the space between the roof plate and the roof tile is exhausted from the gap between the roof tile and the roof tile generated when the roof tile is laid. In addition, when building ventilation is provided at the top of the roof, it is exhausted from here. When ridge ventilation is provided, cold air may be drawn in through the gap between the roof tiles, so it is preferable not to provide the ridge ventilation from the viewpoint of thermal efficiency.

The roof tile made of a metal having a high thermal conductivity used for the snow melting roof structure of the present invention has a thermal conductivity of 0.15 cal / 20 ° C. such as zinc, copper, aluminum or an alloy of these metals with other metals. cm ・ s ・ deg 〜10cal / cm ・ s ・ deg
Which is made of metal and is formed into a single roof tile shape by casting, but is formed into a shape in which a plurality of roof tiles formed by hot pressing the flat plate of the metal are laid. May be The roof tiles should not be as thin as galvanized iron plates and should be at least 0.5mm-10
Any mm is acceptable. It is preferably 1 mm to 7 mm, more preferably 2 mm to 5 mm. If the thickness is 0.5 mm or less, the heat capacity is small and it is not suitable for melting the snow that continues to fall. If the thickness is 10 mm or more, not only the weight becomes heavy but also the cost becomes high. The shape of the roof tile made of metal having high thermal conductivity may be corrugated roof tile or flat roof tile, but when the roof tile is laid on the roof tile, it is preferable to use the roof tile to form a space for passing warm air between the roof tiles. . When using a flat tile, it is preferable to use a flat tile having a concave groove formed on the roof tile side surface so as to form a space through which warm air can pass.

As a metal having high thermal conductivity, aluminum (having a thermal conductivity at 20 ° C. of 0.49 cal / cm · s · de
g), zinc (heat conductivity at 20 ° C is 0.27 cal / cm ・ s ・
deg), copper (heat conductivity at 20 ° C is 0.92 cal / cm ・ s ・
deg), alloys of aluminum and other metals, alloys of zinc and other metals, alloys of copper and other metals, etc. can be used.

The base plate is made of a commonly used wooden board, is laid on a tall tree, and has ventilation holes formed at the front of the eaves for passing warm air. Although there may be a plurality of ventilation holes or a single ventilation hole, it must be capable of sufficiently supplying warm air to the space between the base plate and the roof tile. On the back side (opposite to the side where tile tiles are laid) of the field board laid on the tar tree, an insulating material is laid so that the heat of warm air passing through the space between the field board and the tiles does not escape. Is preferred.

In order to lay the heat insulating material on the back side of the field board, the field board may be laid on the tal tree after the heat insulating board is fitted and laid between the tal trees. May be laid, and a ground plate may be laid on the surface of the heat insulating board, or a heat insulating board may be further laid on the tar tree, and the tar wood may be further constructed on the upper surface of the heat insulating board, and the ground plate may be placed on the tar tree. It is also good to have a double tall wooden structure to be laid. Furthermore, a ground plate lined with a heat insulating material obtained by laminating a heat insulating board on the back surface of the base plate in advance with an adhesive or the like may be laid on a tall tree.

In view of thermal efficiency, it is preferable to provide one or more warm air introducing portions provided with a heat insulating material below the eaves of the ventilation hole forming portion where the ventilation holes are formed in the field board. It is preferable to provide a plurality of warm air introducing portions and supply the warm air to the space between the base plate and the roof tile from a plurality of locations. It is preferable that the warm air introduction portion is formed as a heat insulating duct that is continuous all around the eaves of the house, and that the warm air is supplied from the entire circumference of the house to the space between the base plate and the roof tile.

When the warm air introducing portion is formed as a heat insulating duct which is continuous all around the eaves of a house, the heat insulating duct is a synthetic resin sheet or a metal foil or a composite sheet or a synthetic resin sheet in which a synthetic resin sheet and a metal foil are laminated. A water-impermeable sheet material such as a metal vapor-deposited sheet formed by vapor-depositing a metal or a drain gutter formed by laying a metal thin plate may also be used. When warm air is passed through the space between the base plate and the roof tile made of metal with high thermal conductivity, the moisture in the warm air will condense on the back surface of the roof tile made of metal with high thermal conductivity, and will consist of metal with high thermal conductivity. It may flow down the back surface of the tile toward the eaves. At this time, when the ventilation holes are covered with a breathable waterproof sheet, dew condensation water does not fall into the heat insulation duct, but when not covered with a breathable waterproof sheet, dew condensation water drops inside the heat insulation duct and the condensation water drops. Accumulates,
It may be necessary to drain this as it may reduce the insulation of the insulation duct. As a method of draining the condensed water dripping in the heat insulation duct, a gutter for receiving the condensed water dripping in the heat insulation duct may be provided, and the condensed water may be discharged from the gutter to the outside of the house. A water-impermeable sheet material or a thin metal plate may be laid inside, and the heat-insulating duct may also be used as a gutter, and the condensed water may be drained from the gutter to the outside of the house. It is preferable to use a gutter and heat insulating duct that also serves as a heat insulating duct and a gutter for draining condensed water.

As a heat insulating material laid on the back side of the field board and a heat insulating material forming the warm air introducing portion, a heat-reflective sheet such as aluminum foil is laminated on one surface of glass wool, and a waterproof synthetic resin film is formed on the other surface. Surface layers of synthetic resin film, metal foil, paper, etc. on both sides of polyurethane resin, polystyrene foam, polyolefin foam, isocyanurate foam, polyvinyl chloride foam, etc. It is possible to use a laminate of the above.

The base plate lined with a heat insulating material may be formed by adhering a pre-manufactured heat insulating material to the base plate with an adhesive, a synthetic resin film, a metal foil, paper or a laminate of these. It is made by applying or pouring a foamable synthetic resin liquid to a surface material made of a product, foaming the foamable synthetic resin, and laminating and integrating plate materials to be a base plate while the foamable synthetic resin still has tack. It may be.

The ventilation holes formed in the eaves may be one or plural in number provided in the base plate as long as they are sufficient to guide warm air to the space between the base plate and the roof tiles. . Further, this vent hole may be formed by not laying a field plate over a part or the entire circumference of the eaves part. The vent holes formed in the roof plate may be covered with a breathable waterproof sheet in order to prevent condensed water that has condensed on the back surface (field board side) of the roof tile from flowing down along the back surface of the roof tile.

As the breathable waterproof sheet, any one can be used as long as it allows warm air to pass therethrough but does not allow the condensed water adhering to the back surface of the roof tiles to drip. For example, a nonwoven fabric made of synthetic resin fiber such as polypropylene fiber, polyethylene fiber, polyester fiber, or a nonwoven fabric made of inorganic fiber such as glass fiber can be used. When these non-woven fabrics are composed of thick fibers having a fiber diameter of more than 0.5 denier, those treated with water repellent treatment such as silicon treatment or fluorine treatment are preferable.
If the fiber system uses ultrafine fibers having a denier of 0.5 or less, it can be used as it is because it is excellent in waterproofness without water-repellent treatment. Of course, a non-woven fabric made of ultrafine fibers that has been subjected to a water repellent treatment can also be used, which is more preferable from the viewpoint of waterproofness.

In the case of utilizing warm air in the house, a warm air introducing portion laid with a heat insulating material is provided below the eaves portion of the ventilation hole forming portion formed in the eaves portion, and the wall portion is opened at the warm air introducing portion. It is necessary to provide a warm air introduction pipe that penetrates and opens into the room, and efficiently guide the warm air in the house to the ventilation holes formed in the base plate.

In order to efficiently guide the warm air in the house to the warm air introducing portion, it is preferable to install a heat collecting fan for collecting the warm air in the room at an appropriate position of the warm air introducing pipe. The heat collecting fan may be provided on the warm air introducing portion side of the warm air introducing pipe or on the side opening to the room, but it is preferable to provide the heat collecting fan on the side opening to the room because warm air can be collected efficiently. The position where the warm air introduction pipe is opened to the inside of the room is most preferable near the ceiling part because the warm air inside the room convects inside the room and the warm air gathers at the ceiling part.

In the case of using warm air produced by another heat source outside the house, a warm air introducing portion provided with a heat insulating material is provided at the lower part of the eaves forming portion on the front plate of the eaves portion, and A warm air introducing pipe that opens to the warm air introducing portion and guides warm air generated from a heat source outside the house to the warm air introducing portion may be provided, and the warm air inside the house may be efficiently led to the ventilation holes formed in the field plate. When the warm air produced by another heat source outside the house is directly introduced into the warm air introduction section to melt the snow, it is preferable that the warm air introduction section is an adiabatic duct in terms of thermal efficiency.

[0021] It is preferable to use the warm air generated by the heat source outside the house when the warm air inside the house cannot sufficiently melt the snow. Of course, it is possible to use only the warm air outside the house, but in terms of thermal efficiency,
It is recommended to use it together with warm air in the house.

As the warm air introducing pipe, it is preferable to use a heat insulating pipe in which the outside of the introducing pipe is covered with a heat insulating material in order to efficiently guide heat to the warm air introducing portion. Insulation pipes are metal pipes such as steel pipes,
It is possible to use a synthetic resin tube such as a vinyl tube wrapped with a heat insulating material made of glass wool, or an integrally formed foam synthetic resin layer.

When laying a roof tile made of a metal having a high thermal conductivity, an electric heater is laid on the roof tile rail so that at least a part of the roof tile made of a metal having a high thermal conductivity contacts the electric heater. It is better to lay it in In this way, it is preferable that the roof tile can be efficiently supplemented with heat by turning on the power of the electric heater when the heat of the warm air in the house is not sufficient for melting snow.

The electrothermal heater may be any one of a heating wire heater, a sheet heating element formed by wiring a heating wire, and a sheet heating element using a sheet heating element made of carbon black, graphite, graft carbon or the like. Although it may be one, a sheet heating element is preferable in terms of heat uniformity.

As the roof tile rail for laying the roof tile made of metal having high thermal conductivity, wood, synthetic resin, or metal can be used. Since the wooden tile rail is easily corroded by dew condensation water or the like, it is preferable that it be subjected to antiseptic treatment. As the roof tile made of synthetic resin, one made of hard synthetic resin such as polyurethane, polystyrene, polyolefin, polyvinyl chloride can be used. As the metal roof tile, a metal extrusion-molded product or a metal plate roll-formed (folded) can be used. When laying a heater, it is preferable to use a roof tile made by roll forming a metal plate. This is preferable because it is possible to form a portion on which a heater is laid when roll-forming a metal plate.

When using a roof tile made of synthetic resin, a heat-insulating roof tile made of synthetic resin foam is used so as not to release the heat of the roof tile that has absorbed the heat of warm air and to be effectively used for snow melting. Can be used. The foamed synthetic resin forming the heat-insulating roof tile can be any hard synthetic resin foam such as rigid polyurethane foam, polystyrene foam, polyolefin foam, isocyanurate foam, polyvinyl chloride foam, etc. A rigid synthetic resin foam having a non-foamed skin layer formed thereon is preferable.

A tile roof made of a hard synthetic resin foam having a non-foamed skin layer is preferable because it does not crush or break even if it is hit with a hammer when it is fixed to the base plate by nailing. It is a thing.

The roof tile having the non-foamed skin layer preferably has a skin layer having a thickness of 0.1 to 0.5 mm. When the thickness of the skin layer is less than 0.1 mm, when the nail is nailed with a hammer. ,
The roof tile may be crushed or damaged. If it is thicker than 0.5 mm, the roof tile may be cracked by nailing.

[0029]

In the snow melting roof structure of the present invention, the roof tile made of metal having a high thermal conductivity is used and the warm air is passed through the space between the roof tile and the base plate. Since it efficiently absorbs heat and radiates it from the surface of the roof tile, during the snowfall season in winter, when the falling snow comes into contact with the roof, it can be melted in a very short time. Also, in the summer, warm air in the house convects to the ceiling of the house, so the warm air is efficiently guided to the space between the roof tile and the base plate, and the roof tile made of metal with high thermal conductivity dissipates the heat of the warm air. Absorbs efficiently,
The heat is radiated from the surface of the roof tiles, which keeps the house cool.

[0030]

【Example】

First Embodiment Referring to the drawings, an embodiment of the present invention will be described with reference to FIG.
FIG. 3 is an explanatory view of a house having a snow melting roof structure of the present invention.
As a roof tile made of metal with high thermal conductivity, an aluminum roof tile (1) with a thickness of 4 mm made by casting aluminum with a thermal conductivity of 0.49 cal / cm · s · deg at 20 ° C is used as a roof tile (2). It is laid and the roof tiles (2) are fixed to the surface of the base plate (3) laminated with the rigid polyurethane insulation board (4),
The base plate (3) having the hard polyurethane heat insulation board (4) laminated is laid on the roof tree to form a roof.

As shown in FIG. 1, the aluminum roof tiles (1) are laid one on top of the other from the eaves toward the roof ventilation at the top of the roof, and the aluminum roof tiles are cast into a curved shape perpendicular to the paper surface. Therefore, a gap for allowing warm air to pass is formed between the roof tile rail and the aluminum roof tile.

A ventilation hole (5) for allowing warm air to pass through is formed in the eaves portion of the base plate, and the warm air introduction portion formed by laying a heat insulating material is formed in the lower portion of the eaves portion of the ventilation hole forming portion. A section (6) is provided. One end of a warm air introduction pipe (9) is opened in a wall (8) that blocks the warm air introduction portion (6) and the space above the ceiling (7) to form a warm air introduction portion opening (10),
This warm air introduction pipe (9) passes through the space above the ceiling, and the other end opens from the ceiling to the room to form an indoor opening (11),
The snow melting roof structure of the present invention is formed.

When the warm air introduction part (6) is not provided, one end of the warm air introduction pipe (9) is opened from the ceiling part to the inside of the room, and the warm air introduction pipe (9) is connected to the space above the ceiling (7) and outside the house. It suffices to penetrate the wall (8) that blocks the and the other end directly to the vent hole (5). In this case, since the warm air introduction pipe that penetrates the wall (8) is directly exposed to the outside air from the outside of the wall to the ventilation hole (5), the heat of the warm air passing through the warm air introduction pipe is cooled by the outside air. Therefore, it is preferable to heat-insulate the warm air introduction pipe in the portion exposed to the outside air with a heat insulating material.

Further, even when the warm air introducing portion (6) is provided, the warm air introducing pipe () is not necessarily provided on the wall (8) which blocks the warm air introducing portion (6) and the space above the ceiling (7). One end of 9) is opened to form a warm air introduction part opening (10). This warm air introduction pipe (9) passes through the space behind the ceiling, and the other end is opened from the ceiling part to the inside of the room ( 11) need not be formed, and one end of the warm air introducing pipe (9) is opened in the heat insulating material below the warm air introducing portion (6) and the other end of the warm air introducing pipe (9) is connected to the room. It may be opened to the room (the room near the ceiling) through a wall that blocks the outside air. Also in this case, since the warm air introduction pipe (5) is exposed to the outside air from the outside of the wall (8) to the warm air introduction portion (6), the portion of the warm air introduction pipe exposed to the outside air is made of a heat insulating material. It is preferably heat-insulated.

In the house having the snow melting roof structure of the present invention,
The warm air generated by the heater used in the room convects in the room and warms the room, and excess warm air (waste heat from indoor ventilation) gathers near the ceiling of the room, so this excess warm air (waste heat from indoor ventilation). Is introduced into the warm air introduction part (6) from the warm air introduction part opening (10) through the warm air introduction pipe from the indoor opening (11), and the warm air further rises, and the ventilation hole (formed in the eaves part of the floor plate (3) ( It goes through 5), enters the space between the aluminum roof tile (1) and the base plate (3), and warms the aluminum roof tile (1) as it rises toward the ventilation of the building.

Since the aluminum roof tile (1) has a high thermal conductivity and the hard polyurethane heat insulating board (4) is laminated on the back side of the roof of the base plate (3), the heat of warm air is not released to the other. It absorbs efficiently and melts the snowfall on the aluminum tiles.

In the summer, warm air in the room is heated in the same manner as described above, including the indoor opening (11), the warm air introduction pipe (9),
It passes through the warm air introduction part opening (10), the warm air introduction part (6), and the ventilation hole (5) and enters the space between the aluminum roof tile (1) and the floor plate (3), and rises toward this room ventilation. However, since the heat is conducted to the aluminum roof tile (1) and the heat is dissipated from the aluminum roof tile (1) to the outside air, the room becomes cool without being trapped in the room.

Reference Example In November 1993, in Fujiwara, Mizukami-cho, Tone-gun, Gunma Prefecture, roof tiles were partially soil tiles and partially had thermal conductivity at 20 ° C.
Construct an experimental hut with a snow melting roof structure of the present invention using 0.15 cal / cm.s.deg. Iron tiles and the same aluminum tiles used in the examples for the rest, and use an oil stove as a heating device. Then, the indoor temperature was kept at 25 ° C. and a snow melting experiment was conducted overnight.

The next morning, when the snow on the roof was checked,
About 10 cm of snow was laid where the soil tile was laid, and about 10 cm of snow was found where the iron tile was laid, which was almost the same as the portion where the soil tile was laid. On the other hand, when aluminum tiles were laid, no snow was observed.

In the same laboratory, the temperature of the roof tile surface in the summer and the temperature of the space between the roof tile and the base plate were measured from 11:00 am to 3:00 pm on August 5, 1994. As a measuring method, a 6-point digital surface thermometer manufactured by Yokogawa Electric Co., Ltd. was set at each point, and the room temperature and the outside air temperature were measured using an alcohol thermometer. The measurement results are shown in Table 1.

[0041]

[Table 1]

As is clear from Table 1, comparing the surface temperature and the back surface temperature of aluminum roof tiles, clay roof tiles, and iron roof tiles, the surface temperature and the back surface temperature of aluminum roof tiles are The temperature of the space between the roof tile and the roof tile, which is lower than the surface temperature and where the aluminum roof tile is laid, is 3 to 3 more than the temperature of the space between the roof tile and the roof tile where the earth tile or iron tile is laid. 4 ° C
The temperature is low, the influence of the outside air temperature on the room is extremely small, and it is cool in the summer. This result is contrary to the applicant's prediction that when aluminum tiles are laid, the aluminum tiles absorb the outside air temperature well, and the inside temperature is also affected, which makes the indoor temperature hot. It turned out to be a roof structure that does not receive.

[0043]

According to the snow melting roof structure of the present invention, roof tiles made of metal having high thermal conductivity are laid on the roof tiles provided on the base plate, and warm air is supplied from the ventilation holes formed at the eaves. Introducing this system, warm air is passed through the space between the roof and roof tiles, and hot air is exhausted from the ridge ventilation holes at the top of the roof.In winter, therefore, the snow that falls is efficiently melted and It is possible to supply housing that does not require snow removal work.

Unlike conventional snow melting roof structures, roof tiles made of metal with high thermal conductivity are used, and the heat from the heat source is effectively used for snow melting, so there is little heat loss and thermal efficiency. Not only is it good, but large-scale equipment such as laying electric heaters on the entire surface of the base plate, installing heaters on roof tiles, and laying pipes for circulating heat medium in the attic as in the past It is unnecessary, economical, and extremely easy to maintain. Moreover, since no special machinery is used, there is no failure.

Furthermore, since roof tiles made of metal having a high thermal conductivity are used and heat is supplied to the roof tiles, heat is sufficiently conducted to the eaves, so unlike the conventional snow melting roof, the eaves are provided at the eaves. There will be no snow that could not be slid off, no icicles or sugamori, and people passing under the eaves will not be injured by falling icicles.

Since warm air used for heating the room (waste heat from indoor ventilation) can be used as warm air, even when another heat source is used to prevent snow accumulation, as in the conventional snow melting roof. , The amount of heat is small, and the utility cost can be saved.

[Brief description of drawings]

FIG. 1 is a partially omitted explanatory view of a house having a snow melting roof structure of the present invention.

[Explanation of symbols]

 (1): Aluminum roof tile (2): Roof tile (3): Base plate (4): Polyurethane foam insulation board (5): Ventilation hole (6): Warm air introduction part (7): Ceiling space part (8) : Wall (9): Warm air inlet pipe (10): Warm air inlet opening (11): Indoor opening

Claims (12)

[Claims] 1. A roof tile made of a metal having a high thermal conductivity is laid on a roof tile board provided on a base plate, and warm air is introduced from a ventilation hole formed at the eaves end portion to form a roof plate and a roof tile. A snow melting roof structure that allows warm air to pass through. 2. A roof tile made of metal having a high thermal conductivity is laid on a roof tile rail provided on a base plate, and a ventilation hole is formed at the eaves portion, and the ventilation hole is formed below the eaves portion. A warm air introducing portion provided with a heat insulating material is provided, and a warm air introducing pipe that opens to the warm air introducing portion and penetrates the wall portion and opens to the room is provided, and warm air in the room is passed from the introducing pipe through the warm air introducing portion. A snow melting roof structure that allows warm air to pass through the space between the roof plate and roof tiles. 3. A roof tile made of a metal having a high thermal conductivity is laid on a roof tile rail provided on a base plate, and a vent hole is formed in the base plate at the eaves end, and the eaves end of the vent hole forming portion. A warm air introduction part provided with a heat insulating material is provided in the lower part of the warm air introduction pipe, which opens to the warm air introduction part, penetrates the wall portion between the warm air introduction part and the indoor ceiling space, and opens from the ceiling part to the room. A snow melting roof structure in which warm air in the room is passed from the introduction pipe to the space between the roof plate and the roof tile via the warm air introduction portion. 4. A roof tile made of a metal having a high thermal conductivity is laid on a roof tile board provided on a base plate, and a ventilation hole is formed at the eaves tip portion, and the ventilation hole is formed at a lower portion of the eaves tip portion. A snow melting roof structure in which a warm air introduction section provided with a heat insulating material is provided, and warm air is introduced into the warm air introduction section from a heat supply device provided outdoors or indoors to allow warm air to pass through the space between the base plate and the roof tile. 5. The roof tile made of a metal having high thermal conductivity is 20
Thermal conductivity at 0.15cal / cm ・ s ・ deg 〜10cal / cm
The snow melting roof structure according to any one of claims 1 to 4, which is a roof tile made of a metal of s · deg. 6. The snow melting roof structure according to claim 1, wherein the roof tile made of a metal having a high thermal conductivity has a thickness of 0.5 mm to 10 mm. 7. The snow melting roof structure according to any one of claims 1 to 6, wherein a heat insulating material is laid on the back side of the roof of the field board. 8. The snow melting roof structure according to claim 2, wherein the warm air introducing portion is a heat insulating duct formed around the entire roof eaves. 9. The snow melting roof structure according to claim 8, wherein the heat insulating duct also serves as a drainage gutter formed by laying an impermeable sheet material or a thin metal plate inside. 10. The heat collecting fan for sucking warm air in a room is provided at an appropriate position of the warm air introducing pipe.
9. The snow melting roof structure according to any one of 9 above. 11. The heater is laid on the roof tile rail, and is laid so that at least a part of the roof tile made of a metal having a high thermal conductivity is in contact with the heater. Snow melting roof structure described in paragraph. 12. The snow melting roof structure according to any one of claims 1 to 11, wherein the ventilation holes formed in the eaves are covered with a breathable waterproof sheet.