JPH11343707A - Snow melting composite roofing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite roofing excellent in convenience such as handling, conveyance, safekeeping, etc., in roofing work and capable of carrying out uniform and stable snow-melting operation with the whole surface. SOLUTION: A thermal insulating film 12 of polyethylene film is monolithically stuck on the lower surface of a metal roofer such as batten seam, curved plate, etc., in a contact state, at the same time, a heating surface resistor 14 of a parallel circuit silkscreen to a lower side insulating film 18 of polyimide film or heat resisting polyethylene film is coated with an upper side insulating film 17 having the same quality of the material as that of the lower side insulating film to make less than approximately 0.3 mm in thickness, and a PTC heater 13 thinner than the insulating film is monolithically stuck on the lower surface of the upper side insulating film 17 in a contact state. By the constitution, three layers of the metal roofer, thermal insulating film and PTC heater are so formed that they have altogether at most approximately 5.0 mm in thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved snow-melting composite roofing material for a metal-plated roof.

[0002]

2. Description of the Related Art As this kind of composite roofing material for snow melting, Japanese Patent Laid-Open No. 225575/1990, which is considered to be most similar to the present invention.
No. are known.

[0003] The snow melting roof material (2) of this known invention comprises a metal roof surface material (3), an electric heater (4) closely attached to its lower surface, and a heat insulating material (5) further adhered to its lower surface. ) And a total of three layers.

[0004]

However, the electric heater (4) of the above-mentioned known invention is shown in FIGS. 5 and 6 and the description thereof. Since it is a linear heating element, the roof surface material (3) made of a metal plate is used. It is not possible to generate heat uniformly and uniformly over the entire surface of the device.
It is not described at all.

[0005] In this regard, a sheet heater capable of uniformly generating heat over the entire surface by resistance heating is used for melting snow, and is laid and fixed on the lower surface of the roof material by on-site construction. As shown in FIGS. 15 and 16, the heater forms a heating surface resistor (1) using a resistive material such as carbon paint, and embeds a pair of electrode wires (2) in the inside and heat-resistant the outer surface. The sheet resistor (1) is insulated by a synthetic resin film (3), and generates heat by applying a voltage from a power supply line (4) connected to the electrode line (2). .

However, since the resistance material of such a sheet heater has almost no change in the temperature of the resistance value, unless a sensor for measuring the heat generation temperature is specially attached and the heat generation temperature is controlled by the output signal, a fire may occur. Accidents cannot be prevented, and there is a problem in use safety.

[0007]

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem. For this purpose, a composite roofing material for snow melting is firstly provided on a lower surface of a metal roof plate such as a tile rod or a folded plate. A heat insulating film made of polyethylene film is adhered in a close contact state and integrated, and the surface resistor for heating of the parallel circuit screen-printed on the lower insulating film of the polyimide film or heat-resistant polyethylene film is covered with an upper insulating film of the same material. A thickness of about 0.3 mm or less, a PTC heater thinner than the above-mentioned heat-insulating film, and further adhered to the lower surface of the heat-insulating film in an intimate contact state, thereby integrating the metal roof plate, the heat-insulating film and the PTC. It is characterized by being formed at a thickness of about 5.0 mm at the most from a total of three layers of heaters,

[0008] Second, a thickness of about 0.1 mm by covering a lower surface insulating film of a polyimide film or a heat-resistant polyethylene film with a heating surface resistor of a parallel circuit screen-printed with an upper insulating film of the same material. A PTC heater of 3 mm or less is adhered to the lower surface of a metal roof plate such as a tile rod or a folded plate in a tightly contacted state, and a heat insulating film of a thicker polyethylene film is further formed on the lower surface of the PTC heater. By bonding and integrating in a close contact state, a total of 3
It is characterized in that it is formed to be at most about 5.0 mm from the layer.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific structure of the present invention will be described below in detail with reference to the drawings. First, FIGS. 1 to 7 show a first embodiment of the present invention applied to a tile rod. Is a metal roof plate having a thickness of about 0.4 to 0.6 mm forming a tile rod body (groove plate), and (12) is a heat insulating film adhered to and integrated with a flat lower surface thereof, Thickness-consists of a polyethylene film of about 4.0 mm.

Further, (13) is a PTC (Positive Tempera) having a thickness of about 0.2 to 0.3 mm, which is further adhered and integrated to the lower surface of the heat insulating film (12).
tureCoefficient) heater, and these metal roofing plate (11), heat insulating film (12) and PTC heater (1
3) to form a composite roofing material (R) for snow melting having a thickness of at most about 5.0 mm.

The heat insulation film (1) of the above polyethylene film
The reason why 2) is thicker than the PTC heater (13) and the reason why the PTC heater (13) is interposed between the PTC heater (13) and the metal shingle (11) is in summer or in a warm region where snowfall is relatively small. During use, the heating of the metal shingle (11) due to the direct sunlight is prevented from affecting the PTC heater (13), and is protected.

When the temperature of the PTC heater (13) becomes equal to or higher than the Curie point, the resistance rapidly increases, so that the PTC heater (13) serves as a constant-temperature heating element exhibiting a self-temperature control function.
As shown in FIG. 2 to FIG. 4, the heating resistor (14) includes a pair of electrode wires (15) and (16) and a pair of upper and lower insulating films (17) and (18) covering these. Set temperature is 40 ° C to 85 ° C, rated voltage is AC / DC5V
~ 200V, insulation resistance is 100MΩ at 500VDC.

That is, the surface resistor (14) of the PTC heater (13) uses an oxide sintered body (ceramic) of manganese, nickel, cobalt, iron or the like as a resistance material or a heating element, and its powder paste is on the lower side. The electrode lines (15) are printed by silk-screen printing on the insulating film (18).
It forms an overall parallel circuit (equivalent circuit) including (16).

Therefore, the PTC heater (13) can be formed in an extremely light and thin wall shape with a total thickness of about 0.2 to 0.3 mm, and the parallel resistance circuit may cause a disconnection accident. Without safety,
It is also possible to change the set temperature by adjusting the above components.

Further, since it has a self-temperature control function,
No special bimetal or other temperature measurement sensor is required, and unlike intermittent control by ON / OFF, control by continuous change of resistance value is performed.
Since the fluctuation of the heat generation temperature is extremely small and there is no local temperature rise, it is extremely useful for compounding as a snow melting roof material.

As the pair of upper and lower insulating films (17) and (18), a polyimide film (preferably "KAPTON" (trade name) of DuPont) is used. for that reason,
In addition to this, the screen resistor (14) can be screen-printed accurately and has excellent mechanical, electrical, and chemical properties in a wide temperature range from a low temperature range of -269 ° C to a high temperature range of + 400 ° C. Demonstrate the characteristic. However, a polyethylene film having high heat resistance may be used instead of the polyimide film.

The pair of electrode wires (15) and (16) are shown in FIG.
As is apparent from FIG. 3, the surface state is arranged on the surface of the surface resistor (14), and is entirely covered by the upper insulating film (17) integrated with the lower insulating film (18). It is in. (19) and (20) are the electrode wires (15) and (1).
6). It goes without saying that the sheet resistor (14) generates heat when a voltage is applied through the lead wire. The thermoswitch is not shown.

Although the first embodiment having the above-described configuration shows specifications suitable for use in the summer or in a warm region where the amount of snowfall is relatively small, the specifications for the cold region where the amount of snowfall is large are as described in the first embodiment. 8 to 10 showing a partially modified embodiment of the present invention, the PTC heater (13) is directly adhered to the flat lower surface of the metal roof plate (11) in a tightly adhered state, and the polyethylene is further attached to the lower surface. A heat insulating film (12), which is also thicker than the PTC heater (13), is integrated by adhering the film heat insulating film (12) in close contact.
Accordingly, it is preferable to prevent heat radiation toward the lower side of the PTC heater (13).

The other configurations of the partially modified embodiment are substantially the same as those of the first embodiment, and
8 to 10 are denoted by the same reference numerals as those in FIGS. 1 to 7, and detailed description thereof will be omitted.

In any of the first embodiment and its partially modified embodiment, when performing the roofing work using the composite roofing material (R) for snow melting, FIGS. 9, 1
As shown in FIG. 0, the snow-melting composite roofing material (R) is laid from above on an underlaying material (22) such as asphalt roofing fixed to a roof base plate (21) of the roof in advance, and the composite Roofing materials (R) are connected and integrated with each other by seams (23) through joints between them, and the seams (23)
Nails and self-drilling screws (25) to the tree (24)
Can be fixed by (26) is the hanging element (2) as described above.
3) Cap (wrapping plate).

As shown in FIG. 7, the lead wires (19) and (20) of the PTC heater (13) in the composite roofing material (R) are brought into an assembled state in the above-mentioned laying process, and this is fed to the feeder line. (27) By connecting to (28), the roofing work can be performed efficiently with the shortest possible wiring.

Next, FIGS. 11 and 12 show a second embodiment of the present invention applied to a folded plate. In this embodiment, not only the flat lower surface of a bent metal roof plate (11a) but also a folded plate is shown. A heat insulating film (12a) of a polyethylene film is also attached to the inclined lower surface of the chevron portion in a continuous close contact state.

Further, the PTC heater (13c) is adhered to the lower surface of the heat insulating film (12a) in close contact with and integrated with the metal roof plate (11a), the heat insulating film (12a) and the PTC heater (12a). 13a), a snow-melting composite roofing material (R) having a thickness of at most about 5.0 mm is formed.

However, in the case of the second embodiment, the PTC heaters (13a) are separated in parallel so as not to interfere with the tight frame (29) of the folded plate so as to be parallel to the whole except for the apex of the chevron. It is integrated into the product.

FIGS. 13 and 14 relate to a partially modified embodiment of the second embodiment. As is apparent from FIG.
The TC heater (13a) is directly attached to and integrated with the lower surface of the metal roof plate (11a), and the heat insulating film (12a) for preventing heat radiation is provided on the lower surface of the PTC heater (13a).
May be adhered and fixed in a close contact state.

Since the other configurations of the second embodiment and the partially modified embodiment are substantially the same as those of the first embodiment, the corresponding reference numerals in FIGS. Just fill it in and omit its detailed description.

When constructing the composite roofing material (R) for snow melting according to the second embodiment and its partially modified embodiment, FIG.
The main building of a building that was previously constructed like 2, 14 (30)
The lower end of the tight frame (29) is welded and integrated, thereby supporting the angled portion of the composite roofing material (R) and joining the adjacent composite roofing material (R) at the angled portion. It is good to fix via the point bolt (31) and its fastening nut (32). (33) is a washer, and (34) is an elastic packing.

Even in the composite roofing material (R) for snow melting according to the second embodiment and the partially modified embodiment, the PT
Lead wire (19a) (20a) of C heater (13a)
Therefore, it is not necessary to make a long wiring, and it is possible to efficiently perform the folded-plate roofing work as in the first embodiment.

[0029]

As described above, in the composite roofing material for snow melting (R) of the present invention, due to its structure, the polyethylene film is thermally insulated on the lower surfaces of the metal roofing plates (11) and (11a) such as tile rods and folded plates. The films (12) and (12a) are adhered to each other in an intimate contact state and integrated, and the surface resistor (14) for heat generation of a parallel circuit screen-printed on a lower insulating film (18) (18a) of a polyimide film or a heat-resistant polyethylene film. ) (14
The thickness of the PTC heater (1) which is smaller than that of the heat insulating films (12) and (12a) is reduced to a thickness of about 0.3 mm or less by covering the upper insulating films (17) and (17a) of the same material.
3) (13a) and its heat insulating film (12) (12a)
The metal roof plate (11) (11a) and the heat insulating film (12) (1)
2a) and the PTC heaters (13) and (13a) are formed to have a thickness of at most about 5.0 mm from the total of three layers, so that the problem of the prior art described at the beginning can be surely improved.

That is, according to the above configuration of the present invention, a sheet heater for melting snow is installed on the lower surface of each of the metal roofing plates (11) and (11a) such as a tile rod and a folded plate independently of each other. It is not necessary, and the roofing work can be done easily and efficiently. Of course, the PTC heaters (13) and (13a) that perform the self-temperature control function are used as the sheet heaters, so special heat generation temperature measurement is possible. There is no need to install a sensor to control the heat generation temperature.

The self-temperature control function of the PTC heaters (13) and (13a) increases the resistance value at high temperatures and suppresses the amount of heat generated, so that it is extremely safe. Ascending, uniform and stable snow melting action on the entire surface can be achieved.

Further, the PTC heater (13) (1)
The heat generating surface resistors (14) and (14a) of 3a) are screen-printed from a powder paste of a ceramic element to form a parallel resistance circuit, so that there is no possibility of a disconnection accident unlike a linear heating element. , Its thickness-about 0.3m
m or less as a thin planar shape.
Heat insulation film of polyethylene film on the lower surface of a) (12)
The composite roofing material (R) for snowmelt having a thickness of at most about 5.0 mm is formed by sticking and integrating in close contact via (12a). Excellent convenience in handling, transport, and storage during roofing work.

Also, a heat insulating film of polyethylene film (1)
2) Since (12a) is thicker than the PTC heaters (13) and (13a), and is interposed between the PTC heaters (13) and (13a) and the metal roofing plates (11) and (11a), the heat insulation is provided. The membranes (12) and (12a) can protect the PTC heaters (13) and (13a) from being heated by direct sunlight, and are useful for use in a warm place where relatively little snowfall occurs or in summer.

On the other hand, according to the structure of the second aspect, P
TC heater (13) (13a) is metal shingle (11)
(11a) is directly adhered to the lower surface of the (11a) in a tightly adhered state, so that uniform heat generation on the entire surface is applied to the metal roofing plates (11) and (11a) without loss, and a reliable snow melting effect is exhibited. And a heat insulation film (12) attached downwardly to the lower surface of the PTC heaters (13) and (13a) so as to be tightly integrated.
Since it can be prevented by (12a), it can be said that it is remarkably effective especially as a specification used in a cold region where a large amount of snowfall occurs.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a composite roofing material for snow melting according to the present invention.

FIG. 2 is an oblique view showing a PTC heater extracted therefrom.

FIG. 3 is an electric circuit of FIG. 2;

FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. 2;

FIG. 5 is a cross-sectional view showing a construction state of the first embodiment.

FIG. 6 is a sectional view taken along line 6-6 in FIG. 5;

FIG. 7 is a schematic plan view showing the wiring state of the first embodiment.

FIG. 8 is a perspective view corresponding to FIG. 1, showing a partial embodiment of the first embodiment.

FIG. 9 is a cross-sectional view showing the construction state.

FIG. 10 is a sectional view taken along line 10-10 of FIG. 9;

FIG. 11 is a front sectional view showing a second embodiment of the present invention.

FIG. 12 is a cross-sectional view showing the construction state.

FIG. 13 is a front sectional view corresponding to FIG. 11, showing a partially modified embodiment of the second embodiment.

FIG. 14 is a cross-sectional view showing the construction state.

FIG. 15 is a plan view showing a conventional snow melting planar heater.

16 is a sectional view taken along line 16-16 of FIG.

[Explanation of symbols]

 (11) ・ Metal roof plate (11a) ・ Metal roof plate (12) ・ Heat insulation film (12a) ・ Heat insulation film (13) ・ PTC heater (13a) ・ PTC heater (14) ・ Surface resistor (14a) ・ Surface Resistor (17), Upper insulating film (17a) Upper insulating film (18), Lower insulating film (18a), Lower insulating film (R), Composite roof material for snow melting

Claims (2)

[Claims] 1. A metal roofing plate (11) (1) such as a tile bar or a folded plate.
On the lower surface of 1a), a heat insulating film of polyethylene film (1
2) Attaching and integrating (12a) in a close contact state, and a surface resistor (14) (14) () for a parallel circuit, which is screen-printed on a lower insulating film (18) (18a) of a polyimide film or a heat-resistant polyethylene film. 14a) is coated with the upper insulating film (17) (17a) of the same material to a thickness of about 0.3 mm or less, and the heat insulating film (12) (1
PTC heater thinner than 2a) (13) (13a)
Is further adhered to the lower surfaces of the heat insulating films (12) and (12a) in an intimate contact state and integrated, so that the metal roof plates (11) and (11a) and the heat insulating films (12) and (12a) and the PTC heater (13) are formed. (13) A composite roofing material for snow melting, which is formed from a total of three layers (13a) to a thickness of at most about 5.0 mm. 2. A parallel circuit heating surface resistor (14) (14) screen-printed on a lower insulating film (18) (18a) of a polyimide film or a heat-resistant polyethylene film.
a) is coated with an upper insulating film (17) (17a) of the same material, and a PTC heater (13) (13a) having a thickness of about 0.3 mm or less is formed on a metal roof plate (such as a tile bar or a folded plate). 11) Attach to the lower surface of (11a) in close contact with and integrate it, and further, onto the lower surface of the PTC heater (13) (13a),
A thicker polyethylene film insulation film (1
2) By attaching (12a) in close contact with each other and integrating them, the metal roofing plates (11) (11a), the PTC heaters (13) (13a), and the heat insulating films (12) (12)
a) a composite roofing material for snow melting, wherein the composite roofing material is formed to have a thickness of at most about 5.0 mm from a total of three layers of a).