JPH051448A - Roof structure - Google Patents

Abstract

PURPOSE:To accomplish the improvement of heat insulation in the back space of a roof truss at a low cost by intercepting radiation heat from the roof surface in summer. CONSTITUTION:A heat reflecting film 11 is stuck to a dolphin striker 10 in such a manner that an air layer 12 is formed on the back of a roof board 2. The air layer 12 is opened to the outside from ventilation louvers 13, 14 in the frontage portion and the ridge portion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof structure applied to a sloping roof such as a gable, a dormitory, and a flat roof, and more particularly to a structure for ensuring heat insulation and ventilation performance of an attic.

[0002]

2. Description of the Related Art FIG. 4 shows a roof structure which has been conventionally generally used in a house. A roof 4 covered with a base plate 2 and a roofing material 3 is constructed on the upper part of the skeleton 1 in a dormitory form, and an attic space 5 is formed between the base plate 2 and the skeleton 1. A heat insulating material 7 is attached to the inner surface of the base plate 2 for heat insulation of the attic space 5. In addition, attic space 5
Ventilation jars 8 and 9 are formed in the eaves and the ridge, respectively, in order to discharge the hot air inside.

[0003]

In the above roof structure, the heat insulating material 7 can provide a certain degree of heat insulating property of the attic space 5. However, in particular, it is difficult to obtain sufficient heat insulating properties against the radiant heat from the base plate 2 in the summer, and therefore the effect of reducing the cooling load due to heat insulation cannot be expected sufficiently. In order to make the heat insulating property of the base plate 2 sufficiently high, it is necessary to use a material having excellent qualitative and performance as the heat insulating material 7, and it is necessary to attach the heat insulating material 7 thickly, resulting in a high material cost. Become.

An object of the present invention is to provide a roof structure capable of obtaining excellent heat insulation performance at low cost and exhibiting excellent performance as a measure against dew condensation.

[0005]

The roof structure of the present invention comprises:
A heat reflection film that forms an air layer open to the ridge and the eaves is provided on the back side of the roof plate.

[0006]

According to this structure, the heat of the roof plate is transmitted to the air layer by conduction and convection, and the radiant heat of the roof plate is blocked by the heat reflection film and reflected to the air layer. In this air layer, there is a flow of air that enters from the open part of the eaves and is discharged to the outside from the open part of the ridge when it is warmed inside, which causes most of the hot air to be released to the outside and The heat insulation performance is improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. In the figure, the same parts as those of the conventional example shown in FIG. 4 are denoted by the same reference numerals, and the description thereof will be omitted.

The base plate 2 which is a roof plate is provided on a rafter 10 extending in the direction of inclination of the roof, and as shown in FIG. 2, an air layer 12 is formed between the heat reflecting film 1 and the base plate 2.
1 is attached to the lower surface of the rafter 10. After attaching the heat reflection film 11 to the rafter 10 with double-sided tape,
It is done by hitting a U-shaped staple (tucker) from above. The eaves and the ridge of the air layer 12 are opened to the outside from the ventilation louvers 13 and 14, respectively. As the heat reflection film 11, aluminum foil, kraft paper with aluminum, sheet heat insulating material with aluminum, white sheet, or the like is used.

As shown in FIG. 3, the ventilation gallery 14 of the ridge has upper and lower two layers of ventilation paths 14a and 14b.
The air layer 12 below the air passage opens to the ventilation path 14b below. The upper ventilation path 14a is formed in a substantially T-shaped cross-section, and the lower end portion is below the heat reflecting film 11 and is in the attic space 5
Open to. The attic space 5 is open to the outside from the ventilation gallery 8 at the base end of the eaves as shown in FIG.
A heat insulating material 15 is attached to an upper surface of a ceiling plate 9 which is a partition of the lower frame 1 from the attic space 5.

According to the roof structure having the above-mentioned structure, the heat of the roofing material 3 is transferred from the base plate 2 to the air layer 12 by conduction and convection, and the radiant heat from the base plate 2 is blocked by the heat reflecting film 11. It is reflected to the layer 12 side. In the air layer 12, the air that has entered from the ventilation louver 13 at the eaves end is
When heated by the heat conduction or the radiant heat, an ascending flow as indicated by an arrow x in FIG. 1 is generated and is discharged to the outside from the ventilation path 14b below the ventilation gallery 14 in the ridge. In this way, the radiant heat is blocked by the heat reflection film 11, and the blocked heat is discharged to the outside by the ventilation of the air layer 12, so that the excellent heat insulation of the attic space 5 is obtained.

A part of the radiant heat of the base plate 2 passes through the heat reflection film 11 and is transmitted to the inside of the attic space 5. But,
The warm air in the attic space 5 is the ventilation gallery 8 of the eaves.
By the air flow entering from and flowing as shown by arrow y,
It is discharged to the outside from the ventilation path 14a of the ventilation gallery 14 in the ridge. Due to this ventilation effect, the temperature rise in the attic space 5 is further suppressed.

In this way, since the excellent heat insulating performance is obtained by providing the heat reflecting film 11 and the like, it is possible to sufficiently suppress the temperature rise in the attic space 5 and the room in the body 1 even in the summer. it can. For example, in the case of a two-story building, the indoor temperature on the second floor in summer can be lowered to about room temperature on the first floor. Also, in this way, the heat reflection film 11
Since it is possible to obtain excellent heat insulation simply by providing the
Material cost is reduced because there is no need to provide high quality and thick insulation to the. Furthermore, since the influence of moisture from the room is blocked by the heat reflection film 11 and does not reach the base plate 2,
Excellent performance is also obtained as a measure against condensation.

Although the heat insulating material 15 is attached to the upper surface of the skeleton 1 in the above-described embodiment, even if the heat insulating material 15 is omitted, the heat insulating performance for sufficiently blocking the heat from the roof 4 is not provided. can get.

[0014]

EFFECT OF THE INVENTION In the roof structure of the present invention, the heat reflection film is provided on the back side of the roof plate to form the open air layer in the ridge and the eaves. The air in the air layer warmed by the reflection and the like can be discharged from the ridge to the outside by natural ventilation while being blocked by the reflection. Therefore, excellent heat insulation performance is obtained, and the cooling load in summer can be reduced. In addition, since excellent heat insulation can be obtained only by providing the heat reflection film in this manner, it is not necessary to provide a high quality and thick heat insulating material on the roof plate, and the material cost is reduced. Moreover, since the influence of moisture from the room is blocked by the heat reflection film and does not reach the roof plate, there is an effect that excellent performance can be obtained as a measure against dew condensation.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line II-II of FIG.

3 is an enlarged cross-sectional view of a part of FIG.

FIG. 4 is a schematic sectional view showing a conventional roof structure.

[Explanation of symbols]

2 ... Field board (roof board), 5 ... Attic space, 11 ... Heat reflection film, 12 ... Air layer, 13, 14 ... Ventilation gallery

Claims (1)

Claims: 1. A roof structure in which a heat reflection film that forms an air layer open to the ridge and the eaves is provided on the back side of the roof plate.