JP2000320036A - Ceiling part heat insulation structure of building of frame wall method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively heat-insulate a ceiling by positioning a ceiling joist on the upper face of a head connection, erecting the rafter receiving material of prescribed height on the ceiling joist, and laying a plate-like heat insulation material on the side of the rafter receiving material and the upper face of the ceiling joist. SOLUTION: A ceiling joist 35 is arranged on the upper face of a head connection 29, a plate material 40 such as a particle board is laid on the upper face of the ceiling joist 35, and a rafter receiving material 33 three-stage-overlapping a frame material is erected on the upper face of the plate material 40. A first plate-like heat insulation material 37 and a second plate-like heat insulation material 38 comprising a foaming synthetic resin are laid on the rafter receiving material 33 and the upper face of the ceiling joist 35, and a packing material 45 comprising a plate-like foaming synthetic resin is arranged between the rafters 39. Furthermore, a plate material 30 such as a structural plywood is stretched on the outside of a vertical frame in the direction of a face, and airtight tapes 41, 46 are provided on the outside joint part of the plate material 30 and between the plate material 40 and the rafter receiving material 33 and between the plate materials 30, 40. Thus, sufficient heat insulation performance can be displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulation structure for a ceiling of a framed wall construction building.

[0002]

2. Description of the Related Art A framed wall method for a wooden house usually has a section
It is referred to as a two-by-four construction method for forming pillars, studs, and the like using a material of inch × 4 inch. In such a construction method, there is an advantage that the cost is reduced as a result, since the kind of the cross-sectional dimension of the wood constituting the structural material is slightly small.

FIG. 3 shows a conventional heat insulating structure for a ceiling of a framed wall construction building for a cold region. In this building, a wall 1 having a predetermined thickness is formed by a frame material.
Further, glass wool 8 is loaded in the wall body 1 and is covered with an outer wall subbing material 9. That is, in this building,
An inner heat insulating structure is formed in the wall 1. On the other hand, the rafter 3 is supported by the head joint 2. Glass wool 5 is mounted between the ceiling joists 7 arranged at predetermined intervals so as to abut against the anti-fall 6 from the side. In addition, in order to prevent the moisture in the room from reaching the glass wool, and to prevent the occurrence of dew condensation, moisture-proof materials indicated by reference numerals 4 and 10 are laid.

[0004]

However, in such a conventional framed wall construction building, the ceiling joists are disposed in the back space of the hut. Then, despite the fact that the interior of the cabin and the back of the cabin are to be insulated with glass wool, a thermal bridge is formed at the portion of the ceiling joist, and the desired heat insulating effect cannot be obtained. In order to avoid this, it is possible to improve the heat insulation by laying a plate-like heat insulator etc. on the ceiling joist instead of the glass wool, but the rafter 3 is in the way and the plate heat-insulation material adheres to the roof side However, simply laying a plate-like heat insulating material on a ceiling joist cannot prevent a thermal bridge but also has a problem that a gap is generated.

In order to further solve this problem, a notch may be provided in the plate-like heat insulating material so as to fit into the joist 3 provided at a predetermined interval. Making a notch in a hole requires precision and the interval between joists 3 is not strictly constant, so that it is difficult to make a notch and it complicates on-site work. there were.

[0006] In view of such circumstances, the present invention provides a ceiling heat insulating structure of a framed wall construction building that can effectively prevent a thermal bridge on the ceiling of the framed wall construction building and is easy to construct. It is intended to be.

[0007]

Means for Solving the Problems To achieve the above object, a ceiling insulation structure of a framed wall construction according to the present invention comprises:
A ceiling joist is arranged on the upper surface of the head tie, and a rafter receiving material of a predetermined height is erected on the ceiling joist so as to surround the edge of the ceiling joist, that is, along the wall, and then the rafter is supported by the ceiling joist. After that, a plate-like heat insulating material is laid on the upper surface of the ceiling joist.

[0008] According to such a configuration, a space of a predetermined height can be secured between the ceiling joist and the rafter by erecting the rafter receiving material, so that the plate-like heat insulating material is not cut out in this space. It can be easily installed so as to be in contact with the side surface of the rafter receiving material and the upper surface of the ceiling joist. That is, it is not a heat insulating structure in which a heat insulating material is inserted between the ceiling joists, and since it is not necessary to cut out the plate heat insulating material with high precision, the number of thermal bridges at the ceiling can be reduced as much as possible. The heat insulation with the space behind the hut can be greatly improved.

Here, the number of the plate-shaped heat insulating materials may be one, or two or more. As an advantage of stacking two sheets, even a thin plate-shaped heat insulating material can be made thicker, and by making the plate-shaped heat insulating material into a brick-stacked shape, the gap at the end of the plate-shaped heat insulating material can be reduced. Since it can be closed with another plate-like heat insulating material, the heat insulation loss can be reduced as compared with the case where one plate-like heat insulating material is laid.

[0010] Further, a dry face material such as a veneer, a plywood, a fiberboard, a particle board or the like can be interposed between the ceiling joist and the plate-shaped heat insulating material. In the case of laying with a plate-shaped heat insulator alone, there are many cases where it will break or hang down when a load is applied from above, but inconveniences will occur.However, it is necessary to improve the surface strength by interposing a dry surface material And the above inconvenience can be eliminated.

The dry surface material may be simply laid on the ceiling joist, but may be fixed to the ceiling joist with nails or the like. Further, the dry surface material can be laid on the plate-like heat insulating material.

Further, the abutment comes into contact with the upper surface of the rafter receiving material,
Further, a packing material made of a foamed synthetic resin is provided so as to abut between one rafter and an adjacent rafter. This makes it possible to eliminate insulation defects between the rafters and / or the rafter receiving material and the roof, which is useful for improving the heat insulation of the entire house.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 shows a cross section of a wall of a wooden two-story framed wall construction structure having a ceiling heat insulating structure according to an embodiment of the present invention. In this building, a base 21 is placed on a foundation 20, and end joists or side joists 50, 51 are erected on the base 21. In addition, joist 50,
A plate member 24 is laid on the upper surface of 51 to form the first floor.

On the other hand, the floor surface of the second floor is a plate member 26 arranged on a joist 25, and plate members 26 such as particle board and structural plywood are laid out in the same manner as in the case of the first floor. These plate members 24 and 26 are formed of a woody material such as structural plywood or particle board, but are not limited thereto.

Further, vertical frames 28 are erected at predetermined intervals on the walls on the first and second floors, and these are connected by a head link 29. Outside the vertical frame 28, similarly, a plate material 30 such as a structural plywood or a particle board is stretched in a plane direction. Although not shown, an airtight tape is preferably interposed between the outer joint portion of the plate member 30 and the base 21 and the foundation 20. This airtight tape is a sealing material made of a so-called foamed synthetic resin having appropriate cushioning properties and adhesiveness. Outside these plate members 30, a plate-like heat insulating material 3 made of a foamed synthetic resin is provided.
1 are stretched around, that is, an external heat insulating structure is configured.

This plate-shaped heat insulating material 31 may be one sheet or two sheets. Although not shown, an exterior material is naturally attached to the outside of the plate-shaped heat insulating material.

The plate-like heat insulating material 31 and the plate-like heat insulating materials 37 and 38 laid on the ceiling may be made of any foam. For example, polystyrene foam, polypropylene foam, polyethylene foam, polyurethane foam, Examples thereof include a phenol foam, an acrylic foam, a carbonate-based inorganic foam, a hydroxide-based inorganic foam, a carbonate-based inorganic foam, and a silicate-based inorganic foam. Organic foams such as polystyrene foam and polypropylene foam are preferred when workability based on lightness is to be enhanced, and inorganic foams are preferred when nonflammability is important. These foams can be produced by an extrusion method or a bead method for an organic foam, or a batch method for an inorganic foam. Although the expansion ratio is arbitrary, it is preferably, for example, 20 to 60 times.

An adhesive is used to join the plate member 30 and the plate-like heat insulating member 31 extending in the plane direction of the wall, for example.
Examples of the type of the adhesive include a vinyl acetate resin emulsion-based adhesive, an epoxy-based adhesive, and a urethane-based adhesive. Further, the plate-shaped heat insulating material 31 and the plate material 30 may be connected by a needle material such as a nail or a stapler, but since penetration of a metal such as a needle causes insulation loss, it is necessary to prevent penetration. By arranging such a heat insulating material, an external heat insulating structure is formed outside the vertical frame 28 in this building.

On the other hand, on the ceiling of the second floor, as shown in FIG. 2, a ceiling joist 35 is disposed on the upper surface of the head joint 29, and a particle board and a structural board are provided on the upper surface of the ceiling joist 35. A plate material 40 such as plywood is laid flat. In the embodiment, a particle board is employed. Further, on the upper surface of the plate material 40, there is provided a rafter receiving material 33 having a frame material stacked in three steps. Note that these rafter receiving members 33 are long objects extending in the horizontal direction along the outer periphery of the house. When such a rafter receiving material 41 is erected, a first plate-shaped heat insulating material 37 made of a foamed synthetic resin is laid, and a second plate-shaped heat insulating material 38 is laid above the first plate-shaped heat insulating material 37. Therefore, in the ceiling, the thickness of the heat insulating layer is sufficiently ensured by the double heat insulating materials 37 and 38.

The rafter 39 is supported by a rafter receiving member 33. Further, between one rafter 39 and an adjacent rafter 39, a packing material 4 made of a plate-like foam synthetic resin is provided.
5 are arranged so as to surround the horizontal direction. The packing material 45 may be made of the same material as the plate-like heat insulating materials 31, 37, 38, etc., but preferably has appropriate cushioning properties and flexibility. By arranging such a packing material 45, it is possible to eliminate the heat insulation loss between the rafters 39. In addition, in FIG.
Reference numerals 1 and 46 denote airtight tapes. By adhering such airtight tapes 41 and 46, the plate 30
The airtightness of the joint between the rafter receiving material 33 and the plate material 4
Between 0 and the rafter receiving member 33, the airtightness of the plate member 30 and the plate member 40 can be further improved.

In a building in which the ceiling heat insulating structure provided with the rafter receiving material 33 is installed, it is not necessary to partially cut out the plate-like heat insulating materials 37 and 38 that insulate the ceiling. Since it is only necessary to abut on the side surface of the receiving portion and lay it on the upper surface of the ceiling joist, construction is easy, the working time is short, and the plate-like heat insulating materials 37 and 38 can be laid in double, so that thin heat insulation is provided. Even when a material is used, the heat insulation performance can be sufficiently improved. As mentioned above, although one Example of this invention was described, this invention is not limited to the said Example at all. For example, in the above embodiment, the rafter receiving material 33
Is a three-tiered frame material, but may be a single large frame material. Further, the height may be adjusted to a predetermined height in accordance with the total thickness of the plate-shaped heat insulating materials 37 and 38.

Further, in the above-described embodiment, the construction method in which the vertical frame 28 and the plate member 30 are mounted on the site when constructing the wall and the floor has been described. However, the construction method can be applied to a panel construction method.

According to the present invention, since the structure previously constituted on the floor of the first floor or the floor of the second floor is employed as it is on the ceiling, it is necessary to newly provide members having extra dimensions. Components can be shared. Therefore, it can be constructed inexpensively. Further, even in cold regions, sufficient heat insulation performance can be exhibited.

By adopting such a structure, it is possible to improve the heat insulating performance of the ceiling even in a building of the so-called two-by-four construction method.

[0026]

As described above, according to the thermal insulation structure of the ceiling of the framed wall construction according to the present invention, the ceiling joists are arranged on the upper surface of the head joint of the building whose wall is formed by the framework. Since the rafter receiving material having a predetermined height is erected on the ceiling joist, a space can be secured above the ceiling joist, and this space can be used to lay a plate-like heat insulating material without being cut out. Therefore, since it is not an insulation structure that inserts insulation between the ceiling joists, there is no need to perform the complicated work of notching and lowering the plate-like insulation, and the number of thermal bridges at the ceiling is reduced, and the insulation properties are reduced. improves. Thereby, sufficient heat insulating performance can be exhibited, and an optimum heat insulating structure can be provided as a heat insulating structure in a cold region.

The present invention is also effective for buildings having external heat insulation.

[0028]

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a framed wall construction building provided with a heat insulating structure according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an enlarged part of FIG.

FIG. 3 is a cross-sectional view of a roof on which a conventional girder heat insulation structure is installed.

[Explanation of symbols]

 33 rafter receiving material 35 ceiling joist 37 first plate-shaped heat insulating material 38 second plate-shaped heat insulating material 39 rafter 40 plate material 45 packing material

Claims (4)

[Claims] 1. A ceiling heat insulating structure for a framed wall construction building, wherein a ceiling joist is disposed on an upper surface of a head joint, and a rafter receiving material having a predetermined height is erected on the ceiling joist. A heat insulating structure for a ceiling, wherein a plate-like heat insulating material is laid so as to be in contact with a side surface of the material and an upper surface of the ceiling joist. 2. Between the ceiling joist and the plate-like heat insulating material,
The heat insulating structure for a ceiling part according to claim 1, wherein a dry surface material is interposed. 3. The dry panel according to claim 1, wherein the veneer is a veneer, a plywood, a fiberboard,
The ceiling heat-insulating structure of a framed wall construction building according to claim 2, wherein at least one kind of particle board is selected. 4. A packing material made of a foamed synthetic resin which is in contact with an upper surface of the rafter receiving material and is in contact with one rafter and an adjacent rafter is provided. The ceiling heat-insulating structure according to any one of 1 to 3.