JP2008240405A - Heat insulating structure of residence - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulating structure of a residence which improves heat insulating performance in the cross part of a ceiling plate and a roof material while maintaining the ventilation of a space below a roof. <P>SOLUTION: In the heat insulating structure of the residence, a heat insulating material 58 is arranged by using as a guide the upper face of a plate member 54 installed on a structural material 12 in a horizontal direction in an attic space 50 and the face at the attic side of a heat insulating material panel 56 installed between rafters 32 arranged at predetermined intervals in an eaves direction, and a ventilation part 38 is formed between the heat insulating panel 56 and a sheathing roof board 34 installed on the rafter 32. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat insulating structure of a house, and more specifically, it is possible to reliably exhibit heat insulating performance even at a portion where a girder of a ceiling space and a roof portion intersect, and to efficiently dispose the heat insulating material. It is related with the heat insulation structure of the house which can do.

  Various devices have been proposed for heat insulation structures in houses. As a general heat insulation structure, outside air is taken in from the eaves and the lower end of the outer wall material, passed through a ventilation layer formed between the space under the roof and the outer wall material and the heat insulating material, and then exhausted in the building part. 2. Description of the Related Art A structure for discharging to the outside from an exhaust port disposed on a mouth or wife wall surface is widely known.

In recent years, a heat insulating structure in which a heat insulating material is arranged on a girder to improve heat insulating performance can be seen. In order to improve the heat insulation performance in such a heat insulation structure, if the heat insulating material is disposed thickly on the girder, the heat insulating material is also disposed in the under roof space, and the under roof space may not be ventilated. .
Therefore, in Patent Document 1, in order to enable ventilation of the space under the roof even if the heat insulating material is thickly arranged on the beam, a spacer is provided between the field board and the rafter so that the roof under the roof. Even if the heat insulating material is disposed up to the space, it is possible to secure a ventilation portion in the space under the roof.
Japanese Patent Laid-Open No. 2001-40789

By disposing the spacer in the under-roof space, even if the heat insulating material is disposed in the space above the girder including the under-roof space, a ventilation space in the under-roof space is secured.
However, since the roof is generally inclined, the rafter and the girder intersect at a portion where the girder and the roof part intersect. For this reason, even if the insulation material is arranged thickly on the girders, the portion where the girders and rafters cross is thinner than the other parts, so the condensation is concentrated on this part. The problem of doing so has become clear. In particular, when the slope of the roof is gentle, the portion where the thickness of the heat insulating material is reduced covers a wide range, and the structural material may be severely damaged by condensation.

  Therefore, the present invention has an object of providing a heat insulation structure for a house that can improve the heat insulation performance at the intersection of the roof girder and the roof portion (rafter) while maintaining the ventilation of the space under the roof. Yes.

In order to achieve the above object, the present invention has the following configuration.
That is, the present invention relates to an upper surface of a plate member attached to a horizontal structural member in a ceiling space and a surface on the attic side of a thermal insulation panel attached between rafters arranged at a predetermined interval in the eave direction. As a guide, a heat insulating material is provided, and a ventilation portion is formed between the heat insulating panel and a field board attached to the rafter.

  In addition, the lower end position of the heat insulating material panel is located at least on the outdoor side of the outdoor end surface position of the wall heat insulating material provided on the wall surface of the house. Thereby, the fall of the heat insulation performance in the narrow part where the board member arrange | positioned in ceiling back space and a roof part cross | intersect can be prevented suitably.

  Moreover, the blowing thickness of the said heat insulating material is prescribed | regulated by the upper side edge part position of the said heat insulating material panel, It is characterized by the above-mentioned. Thereby, the operation | work at the time of arrange | positioning a heat insulating material in ceiling back space becomes easy.

  By the way, a cellulose fiber or the like is often used for the heat insulating material provided on the upper surface of the plate member provided in the ceiling space. Since such a heat insulating material is disposed by blowing in a building construction site of a house, when the heat insulating material is disposed between the upper surface of the girder provided in the ceiling space and the heat insulating material panel, the heat insulating material panel However, the construction efficiency is improved because the insulation material is prevented from scattering. Therefore, a low-cost and high-performance residential heat insulation structure can be installed in the space above the ceiling and the space under the roof.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a heat insulation structure for a house according to the present invention will be described based on the drawings. FIG. 1 is an explanatory view showing a ceiling space and a roof portion of a house to which a heat insulating structure according to the present invention is applied.

  The house 100 according to the present embodiment has a shaft structure in which wooden pillars 10 and wooden girders 12 are combined, and has at least a wall portion 20, a roof portion 30, a living space 40, and a ceiling space 50.

  After the inner heat insulating material 21, the structural plywood 23 and the outer heat insulating material 25 are attached to the wall portion 20, an outer wall material 29 is attached through an outer wall base material 27. The inner heat insulating material 21 is disposed between the pillars 10 and 10 in a fitting manner. The thickness dimension of the inner heat insulating material 21 is formed smaller than the dimension of the column 10. It is preferable that the inner heat insulating material 21 is precut to a required dimension in a factory. Further, since the outdoor surface of the inner heat insulating material 21 is flush with the outdoor surface of the pillar 10, an internal ventilation layer 43 defined by the pillar 10, the inner heat insulating material 21, and an inner wall material 44 described later is formed. Is done. The internal ventilation layer 43 can be communicated with the living space 40.

A structural plywood 23 is attached to the outer surface of the inner heat insulating material 21. An outer heat insulating material 25 is attached via a structural plywood 23. In this embodiment, since the thickness dimensions of the inner heat insulating material 21 and the outer heat insulating material 25 are 100 mm and 30 mm, respectively, the heat insulating performance is greatly improved as compared with the conventional wall heat insulating structure.
Moreover, between the inner side heat insulating material 21 and the outer side heat insulating material 25, in order to abbreviate | omit arrangement | positioning of the brace | casing arrange | positioned between the pillars 10 and anchors, such as an anchor bolt fixed to a foundation, the structural plywood 23 is provided. It is arranged. As such a structural plywood 23, a kenaf board or the like is preferably used. The use of the structural plywood 23 is advantageous in that it is possible to omit the bracing between the pillars 10 and the placement of the anchor bolts of the base, and the placement work of the heat insulating material between the pillars 10 is facilitated.

Rafters 32 are arranged on the roof portion 30 with a required interval in the eave direction, and a field board 34 is attached so as to bridge the upper surfaces of the rafters 32. A roof material 36 is disposed on the base plate 34 after a waterproof sheet (not shown) is attached thereto. Between the eaves of the roof portion 30 and the ridge, the under-roof space 38 formed in the rafter 32 and the field board 34 functions as a ventilation portion. This ventilation portion is particularly effective in mitigating overheating of the roof portion 30 in summer.
The living room 40 includes an inner wall base material 42 disposed on the inner surface side of the pillar 10 with a required interval, an inner wall material 44 attached to the inner wall base material 42, and a ceiling material 48 attached to the ceiling base material 46. It is formed by the space surrounded by.

  In the ceiling space 50, a support member 52 is disposed at a required interval in accordance with the height position of the upper surface of the girder 12, and a panel 54 as a plate member is disposed on the upper surface of the girder 12 and the support member 52. Yes. Of the ceiling space 50, the lower part of the panel 54 is provided with air from an underfloor space (not shown) so as to be supplied through the internal ventilation layer 43 divided by the pillar 10, the inner wall base material 42 and the inner wall material 44. ing. Although not shown, a duct for taking in outdoor air and a heat exchanger are arranged in the underfloor space, and fresh air adjusted to a comfortable state through the four seasons can be supplied through the internal ventilation layer 43.

  A heat insulating material panel 56 is disposed on the side of the ceiling space 50 between the rafters 32 disposed on the roof 30 that communicates with the ceiling space 50. The heat insulating material panel 56 is disposed so as to be flush with the lower surface of the rafter 32 by a support member 56 </ b> A disposed on the ceiling back space 50 side of the rafter 32. In the present embodiment, two heat insulating material panels 56 having a thickness of 30 mm are stacked. Each heat insulating material panel 56 is disposed such that the lower end (eave edge side) end portion position is located outside the outdoor side surface position of the inner heat insulating material 21 of the wall portion 20.

The end position on the upper side (ridge side) of the heat insulating material panel 56 is arranged to be the same height position as the upper end height position of the heat insulating material 58 arranged in the ceiling back space 50.
Since the thickness dimension of the heat insulating material panel 56 is smaller than the height dimension of the rafter 32, the ventilation portion between the rafter 32 and the field board 34 is not blocked. That is, as shown in FIG. 1, outdoor air taken in from the opening portion of the eaves or taken in from the lower part of the outer wall flows through the under-roof space 38 from the eaves to the ridge (in the direction of arrow A). The flow of air in 38 is maintained.

  The heat insulating material 58 in the present embodiment uses cellulose fiber, and the heat insulating material 58 is a heat insulating material panel 56 disposed on the upper surface of the panel 54 that is a plate member disposed in the ceiling space 50 and the roof portion 30. It is arranged so as to blow with the side surface of the ceiling space as a guide. Since the thickness of the heat insulating material 58 is the upper end position of the heat insulating material panel 56 disposed on the roof portion 30 (the position where the support member 56A is disposed), the indicator when confirming the blowing position of the heat insulating material 58 is confirmed. Since it can also be used as, it is convenient. Further, since the panel 54 and the heat insulating material panel 56 also serve to prevent the heat insulating material 58 from being scattered when the heat insulating material 58 is blown, it is possible to efficiently dispose the heat insulating material 58.

  The heat insulating material panel 56 disposed in the under-roof space 38 is a panel member that is a plate member that supports the heat insulating material 58 disposed in the ceiling back space 50 in addition to facilitating the disposing operation of the heat insulating material 58. 54 and the part where the roof member (the rafter 32) intersects the heat insulating material 58 at the portion where the filling thickness of the heat insulating material 58 becomes thin. Specifically, only the heat insulating material panel 56 directly exhibits the heat insulating performance at the portion where the rafter 32 that is the roof member and the panel 54 (girder 12) intersect, but the heat insulating material panel 56 and the wall The inner heat insulating material 21 and the outer heat insulating material 25 arranged in the portion 20 are overlapped. Since it has such a structure, it is possible to minimize a decrease in heat insulation performance at a portion where the rafter 32 and the panel 54 (girder 12) intersect, and even the house 100 with a gentle roof inclination is sufficient. It will have thermal insulation performance.

  Since the house 100 in the present embodiment has the configuration described above, the occurrence of condensation due to insufficient arrangement thickness of the heat insulating material 58 at the portion where the control panel 54 and the roof member (rafter 32) intersect. Can be prevented. Thus, in this embodiment, since it can be set as the house 100 with air permeability and high heat insulation, the energy-saving and comfortable house 100 can be provided. Further, since the house 100 does not cause condensation, deterioration of the structural members of the house 100 due to condensation or moisture can be prevented, and the long-lived house 100 can be obtained.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above-described embodiments, and the technical scope of the present invention can be implemented even if various modifications are made without departing from the scope of the invention. Of course it belongs to the range.
For example, in this embodiment, two heat insulation panels 56 having a thickness of 30 mm are disposed in the under-roof space 38, but the heat insulation panels 56 have other thickness dimensions. Of course, a plurality of heat insulation panels 56 may not be necessarily provided, and three or more heat insulation panels 56 may be provided.

  Moreover, in embodiment described above, although the cellulose fiber is used as the heat insulating material 58 arrange | positioned in the upper part of the ceiling back space 50, the heat insulating material 58 may consist of another substance. . The present invention has a very effective configuration when the heat insulating material 58 disposed in the upper part of the ceiling space 50 is disposed by the blowing method. Needless to say, the essential parts of the invention are common.

It is explanatory drawing which shows the ceiling back space and roof part of the house to which the heat insulation structure concerning this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pillar 12 Girder 20 Wall part 21 Inner heat insulating material 23 Structural plywood 25 Outer heat insulating material 27 Outer wall base material 29 Outer wall material 30 Roof part 32 Rafter 34 Field plate 36 Roof material 38 Roof space 40 Living space 42 Inner wall base material 43 Inside Ventilation layer 44 Inner wall material 46 Ceiling base material 48 Ceiling material 50 Ceiling back space 52 Support material 54 Control panel (plate member)
56 Thermal insulation panel 56A Support member 58 Cellulose fiber (thermal insulation)
100 housing

Claims (3)

Insulate with the upper surface of the plate member attached to the structural material in the horizontal direction in the ceiling space and the attic side surface of the insulation panel attached between the rafters arranged at the eave direction at a required interval as a guide Material is arranged,
A heat insulating structure for a house, wherein a ventilation portion is formed between the heat insulating panel and a field board attached to the rafter.   The heat insulation structure for a house according to claim 1, wherein the position of the lower end portion of the heat insulation panel is located at least on the outdoor side of the outdoor end face position of the wall surface heat insulation provided on the wall surface of the house. .   The heat insulating structure for a house according to claim 1 or 2, wherein a blowing thickness of the heat insulating material is defined by an upper end position of the heat insulating material panel.

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