JP2886102B2 - Skylight - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skylight and the like, and more particularly to a temperature difference between a portion of a glass panel irradiated with sunlight and a peripheral portion of the glass panel where sunlight is blocked, and a peripheral portion of glass by indoor heating. The present invention relates to a structure for preventing a glass panel from cracking due to thermal stress due to a temperature difference generated in the glass panel.

[0002]

2. Description of the Related Art A skylight is constructed by fixing a peripheral portion of a glass panel to a frame (including a frame) made of an extruded aluminum alloy.

[0003]

In such a skylight , when exposed to sunlight, the periphery of the glass panel is shielded from sunlight by a frame material, but the glass panel is not heat conductive. Due to the poor performance, a temperature difference occurs between a portion of the peripheral portion where sunlight is not irradiated and a portion of the peripheral portion where sunlight is not irradiated. Especially in the case of skylights, glass panels are often exposed to sunlight vertically during the day because they are installed at an angle on the roof that covers the opening. Is large.

[0004] Further, in the case of skylights, those using double glazing are often used in order to improve the heat insulating property. Of the double glazing, the outer glass is relatively well dissipated by the wind of the outside air. However, since the inner layer glass tends to store heat, the temperature difference between the portion receiving sunlight and the peripheral portion increases. For this reason, as shown in FIG. 6, near the boundary part d between the high temperature part b of the glass panel a which receives the sunlight and the low temperature part c in the periphery where the frame material is shielded from the sunlight, the high temperature receiving the sunlight The part b tends to expand relatively, and the surrounding low-temperature part c tries to restrain the expansion. Therefore, a tensile stress occurs in the surrounding low-temperature part c, and a compressive stress occurs in the high-temperature part b. When this temperature difference increases and the thermal stress increases,
The glass panel a causes a thermal crack e from the surroundings.

[0005] Such a heat crack e is caused by using netted glass as the inner layer glass of the double glazing of the skylight (such netted glass is used to prevent falling of glass fragments at the time of breakage). This is likely to occur because the allowable stress of the screened glass is much lower than that of ordinary float glass.

The left part of FIG. 5 is a graph showing an example of a temperature distribution in an irradiation experiment using an incandescent lamp in a skylight. And the area where light hits (4
It shows the results of measuring the temperature at the central part (0 mm) and the central part. A large temperature difference occurs between the shaded part at the periphery and the part exposed to the sun. The color tends to increase as the color becomes worse.

FIG. 7 is a graph showing the results of a thermal cracking experiment with the above-mentioned temperature difference in a glass-filled glass (constituted as a single-layer glass), in which the relationship between the temperature difference and the thermal cracking was examined. is there. As can be seen from FIG.
When the temperature difference was about 5 ° C. or more, cracks occurred.

In addition to the above-described thermal cracking caused by sunlight, there is also a problem of thermal cracking caused by heating in a cold region. For example, if the heating is performed in a state where the frame material is cooled due to the snow cover in the skylight or the like, the temperature difference between the peripheral portion of the glass panel and the vicinity thereof similarly increases, and the glass panel may be broken.

[0009] It is an object of the present invention to provide a skylight having a configuration capable of preventing cracks generated in a glass panel due to irradiation of sunlight or heating in a cold region as described above.

[0010]

SUMMARY OF THE INVENTION The present invention comprises a double glazing having a perimeter mounted on a frame , wherein the double glazing is an inner glass.
Glass with wire or wire, and the inner layer glass
A heat transfer material made of a material having good thermal conductivity is provided on at least one side of the entire length or a part of the frame , from a portion where sunlight is shielded by the frame to a portion where the sunlight is not shielded. .

[0011]

According to the present invention, a portion of the inner layer glass , which has become hot due to irradiation of sunlight, heating, or the like, is transferred through a heat transfer material.
Heat is transferred to the periphery of the inner layer glass , and the temperature of the periphery increases, thereby reducing the temperature difference.As a result, thermal stress due to the temperature difference is reduced, and the occurrence of thermal cracks from the periphery of the inner layer glass is prevented. Is done.

[0012]

FIG. 1 is a transverse sectional view showing an embodiment of a skylight according to the present invention, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 (A) is a bottom view of an inner layer glass in the present embodiment. . In FIG. 1 to FIG. 3, reference numeral 1 denotes a double glazing. The double glazing 1 is obtained by bonding an outer glass 2 and an inner glass 3 by bonding them through a spacer 4. Is made of float glass, and the inner layer glass 3 is made of netted glass. The double-glazed glass 1 is positioned and sealed by a spacer 8, a beat 9, and a caulking material 10 on a movable frame 7 composed of a horizontal frame 5 and a vertical frame 6 made of an extruded aluminum alloy material as an end holding member. It is attached. A fixed frame 14 composed of a horizontal frame 12 and a vertical frame 13 made of an aluminum alloy is fixed to a wooden frame 11 fixed to the opening of the roof, and the movable frame 7 having a fulcrum 15 as a center is fixed to the fixed frame 14. Can be freely opened and closed. In addition to the rotary opening / closing type, the skylight includes a sliding opening / closing type and a non-opening / closing type.

Reference numeral 16 denotes a heat transfer material having good thermal conductivity added to the indoor surface of the inner glass 3 according to the present invention. It has a width W such that it is provided over a portion where sunlight is not blocked by the spacer 4. As a material used for the heat transfer material 16, aluminum and copper are preferably used in consideration of thermal conductivity, and a metal having good corrosion resistance such as tin, nickel, and stainless steel may be used. . The heat transfer material 16 is formed by applying a tape, attaching by pressing, or applying a metal powder mixed in a binder of a synthetic resin, coating or dipping the metal powder to form a layer, or spraying. Alternatively, a metal multilayer structure or a structure having corrosion resistance formed on the surface may be used.

FIG. 4 is a diagram showing the results of an experiment in which the temperature of each part of the glass panel was measured by irradiating an incandescent lamp for irradiating a heat ray for one hour in order to confirm the effect of eliminating the temperature difference by the heat transfer material 16 according to the present invention. (A) is the temperature distribution of the outer glass, and (B) is the temperature distribution of the inner glass. The skylight used in the experiment was the movable frame 7 with white color and the outer glass 2
Is made of transparent glass, and the inner glass 3 is made of meshed glass.
The heat transfer material 16 is bonded to only one vertical side of the inner glass 3 by using a double-layer glass of cm × 90 cm.
Was laminated with three 50 μm-thick aluminum tapes and the width W was 40 mm.

In FIG. 4A, a1 to a5 denote the temperatures of the peripheral portions of the glass 2 and 3; b1 to b5 denote the temperatures of the outside surface of the glass to which light of 40 mm from the peripheral portion is irradiated;
1, c2 is the temperature of the frame 7, O1, O2 is the temperature of the central part of each of the glasses 2, 3, and Δ is the temperature difference between the temperature b _i of the part of the outer glass 2 where the light hits and the temperature a _i of the corresponding peripheral part. (b _i -a
_i ). As shown in FIG. 4 (A), the outer glass 2 is exposed to the outside air, so that the degree of temperature rise is smaller than that of the inner glass 3, whereas the inner glass 3 tends to store heat, so that the outer glass 2 It is hotter than glass 2,
The temperature difference Δ increases. However, by providing the heat transfer material 16 according to the present invention, the temperature difference Δ at the side of the glass can be greatly reduced from 16.8 ° C. to 8.1 ° C., and there is no possibility that thermal cracks occur. It has been found that the temperature difference can be sufficiently reduced to.

FIG. 5 shows that the temperature of the peripheral portion of the inner layer glass 3, the portion 40 mm away therefrom, and the central portion was not the temperature when the heat transfer material 16 according to the present invention was applied (shown on the right side). This is a measurement result for the case (shown on the left side), and as shown on the right side of FIG. 5, it can be seen that the effect of reducing the temperature difference according to the present invention can be obtained.

When the irradiation of the incandescent lamp is further continued, if the heat transfer material 16 is not stuck, the temperature difference Δ is finally 1
The temperature reached 8.3 ° C., while the temperature to which the heat transfer material 16 was adhered could be suppressed to 10.9 ° C.

In addition to the above experiment, the temperature difference was measured by changing the thickness of the heat transfer material 16 by changing the number of aluminum tapes. When the thickness of the aluminum tape was one (the thickness was 50 μm), the final temperature difference Δ Becomes 13.8 ° C.
In the case of 5 sheets (250 μm), the final temperature difference Δ was 9.4 ° C., and when a 1.2 mm thick aluminum plate was used, the final temperature difference Δ could be reduced to 5.1 ° C. .

When the thickness of the aluminum tape as the heat transfer material 16 is 100 μm, the width W = 30 mm, 40 m
m, the final temperature difference Δ is 13.
The temperature is 6 ° C. and 13.1 ° C., and the greater the width W, the more the temperature difference reduction effect is obtained. Thus, the temperature difference Δ
Is a value related to the width W and thickness of the
It is necessary to provide at least a portion around the inner layer glass 3 where the sunlight is shielded by the end holding member (the spacer 4 in this embodiment) and a portion which is not shielded by the end holding member (the spacer 4). Further, in the case of a skylight, it is preferable that the heat transfer material 16 be invisible or slightly visible from under the skylight without impairing the appearance. 1
When the condensation receiver 20 is provided at the lower part of the
It is more preferable that the width is such that the heat transfer material 16 does not protrude.

In the above embodiment, an example in which the heat transfer material 16 is provided over the entire circumference of the inner glass 3 has been described. However, as shown in FIG. Alternatively, it may be provided only at the center of the side where thermal cracking is likely to occur. Further, instead of providing the heat transfer material 16 on the entire four sides, the heat transfer material 16 may be provided only on the upper side of the skylight, for example, where thermal cracks are particularly likely to occur. Further, the heat transfer material 16 may be provided not only on the indoor surface of the inner glass 3 of the double glazing 1 but also on the outdoor surface, or may be provided on both the indoor surface and the outdoor surface. Further, it may be provided on one or both of the indoor surface and the outdoor surface of the outer glass 2. Further, it may be provided on one or both of the indoor surface and the outdoor surface of the single-layer glass.

The present invention is particularly effective when the glass panel on which the heat transfer material 16 is provided is a glass with a net or a glass with a wire . In carrying out the present invention, various changes and additions can be made to the specific shape, structure, combination, and the like of each component.

[0022]

According to the first aspect of the present invention, there is provided a double glazing having a periphery mounted on a frame , wherein the double glazing comprises an inner glass layer.
Into a glass or a wire-containing glass, over the entire length or a part of at least one side of the inner layer glass , from a portion where sunlight is shielded by the frame to an unshielded portion,
Since a heat transfer material made of a material with good heat conductivity is provided, the inner layer gas
Heat is transferred from the sun-irradiated portion of the lath to the non-sun-irradiated peripheral portion of the inner glass through the thermally conductive material added according to the present invention, and the temperature of the peripheral portion also increases,
This reduces the temperature difference, reduces the thermal stress due to the temperature difference, and prevents the occurrence of thermal cracks from the periphery of the inner glass layer due to sunshine. Also, thermal cracking due to heating can be prevented for the same reason. In addition, the inner glass
The material with good thermal conductivity is provided in the
Consisting of wire or netted glass panel with low stress
Therefore, thermal cracking can be effectively prevented.

[0023]

[0024]

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a skylight to which the present invention is applied.

FIG. 2 is a longitudinal sectional view of the embodiment of FIG.

FIG. 3A is a bottom view of the inner glass of the embodiment of FIG. 1,
(B) is a bottom view showing another example of the inner layer glass.

FIG. 4 (A) is a temperature distribution diagram of an outer glass in an incandescent lamp irradiation experiment on a skylight, and FIG. 4 (B) is a temperature distribution diagram of an inner glass similarly.

FIG. 5 is a diagram showing a comparison of the temperature distribution of the inner layer glass with and without the heat transfer material in the incandescent lamp irradiation experiment of the skylight.

FIG. 6 is a diagram for explaining the occurrence of a temperature difference due to sunlight on a glass panel of a skylight and the occurrence of thermal stress accompanying the temperature difference.

FIG. 7 is a diagram showing a change in a temperature difference between a peripheral portion of a glass panel and its vicinity in an incandescent lamp irradiation experiment.

[Explanation of Symbols] 1: double-layer glass, 2: outer-layer glass, 3: inner-layer glass,
4: spacer, 5: horizontal frame, 6: vertical frame, 7: movable frame, 8:
Spacer, 9: Bead, 10: Caulking material, 11: Wooden frame, 12: Horizontal frame, 13: Vertical frame, 14: Fixed frame, 16: Heat transfer material, 20: Dew condensation

Claims (1)

(57) [Claims] 1. A multi-layered glass having a perimeter attached to a frame , wherein the multi-layered glass has an inner layered glass or a wire.
Glass, and a heat transfer material made of a material having good heat conductivity is provided on at least one side of at least one side of the inner layer glass from a portion where sunlight is shielded by the frame to a portion where the sunlight is not shielded. Skylight .