JP2007056468A - Heat insulating airtight structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulating airtight structure which is a roof slab, a floor slab, or the like with excellent heat insulating property and airtightness. <P>SOLUTION: The heat insulting airtight structure 1 comprises a plurality of beam members 2 composed of webs 2c, upper flanges 2a and lower flanges 2b and disposed parallel at predetermined spaces; a wooden plate 3 horizontally provided at the adjacent beam members 2 so that the ends are fixed to the upper faces of lower flanges 2b of the beam members 2; and a heat insulating material 4 horizontally provided at the adjacent beam members 2 and arranged on the upper face of the wooden plate 3. The heat insulating material 4 is locked to the lower faces of upper flanges 2a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heat insulating and airtight structure used as a roof slab or floor slab of a structure.

A wood type I beam (wood composite shaft material) may be used as a component of a building such as a roof rafter or a floor joist.
Thus, when using a woody I-type beam, for example, as shown in FIG. 8, each space formed between the woody I-type beams 102 arranged in parallel at a predetermined interval is formed in a plate shape. The heat insulating airtight structure 101 is constructed by arranging the heat insulating material 104 and filling the gap between the heat insulating material 104 and the woody I-type beam 102 with the foamable resin 105 (see, for example, Patent Document 1). . The heat insulating and airtight structure 101 of Patent Document 1 has a two-layer structure of a lower plate 104a having a rectangular cross section and an upper plate 104b having a trapezoidal cross section as the heat insulating material 104, and uses a notch portion of the upper plate 104b. A groove between the woody I-type beam 102 and the upper plate 104b is formed to improve the filling performance of the foamable resin 105.

When constructing such a roof slab or floor slab (heat-insulating and air-tight structure 101), it is intended to prevent buckling caused by an increase in the length of the wood I-type beam 102 (span length of the heat-insulating and air-tight structure 101) In general, the anti-roll material 103 is arranged between adjacent wood I-type beams 102 at a predetermined interval with respect to the longitudinal direction of the wood I-type beams 102 (see, for example, Patent Document 2). .
JP 09-100584 A ([0016]-[0020], FIG. 1) JP 2003-160981 A ([0034], FIG. 3)

  However, in the conventional heat insulating and airtight structure 101, since the heat insulating material 104 is divided by disposing the anti-slip material 103, particularly when the heat insulating and airtight structure 101 is used as a roof slab, the place where the anti-sealing material 103 is disposed. In other words, there is a problem that a so-called heat bridge is formed in which heat is transferred. Moreover, when using an I-type beam as a rafter, it is necessary to form the anti-friction material 103 according to the shape of the I-type beam, which takes time for processing and increases manufacturing costs.

  Furthermore, when constructing an airtight structure, it is necessary to provide an airtight layer on the indoor side (lower side in FIG. 8). For this reason, an airtight material such as a vapor barrier may be constructed on the indoor side, which has problems such as troublesome construction and increased costs.

  This invention is made | formed in order to solve the said problem, and makes it a subject to propose the heat insulation airtight structure which is a roof slab or a floor slab etc. excellent in heat insulation and airtightness.

  In order to solve such a problem, the heat-insulating and air-tight structure according to claim 1 is composed of a web and upper and lower flanges, and a plurality of beams arranged in parallel at a predetermined interval. A member, and a wooden plate member that is laterally disposed on the adjacent beam member, the end of which is fixed to the upper surface of the lower flange of the beam member, and is disposed laterally on the adjacent beam member, And a heat insulating material disposed on the upper surface of the wooden board.

  In such a heat-insulating and air-tight structure, adjacent beam members are connected by a wood-based plate material, so that it is possible to fix the beam members without disposing a rolling stopper. In other words, the wood-based plate material provided laterally on the lower flange of the beam member serves as a anti-rolling material to prevent the beam member from buckling. Therefore, since the heat insulating material disposed between the adjacent beam members and on the upper surface of the wooden board is not divided by the anti-rolling material, a heat bridge does not occur.

  In addition, such a heat-insulating and air-tight structure has a plate-shaped wood-based plate material laid between adjacent beam members, so that a U-shaped structure having a U-shaped cross section is formed by the combination of the wooden plate material and the beam member. Therefore, the strength as a roof slab or a floor slab is improved, and a long span is possible. Therefore, since it is possible to reduce the number of installed beams and columns, the construction is facilitated and the material cost can be reduced.

In addition, since the lower flange of the beam member and the end of the wood-based plate material are fixed in a polymerized state, a continuous hermetic layer is formed, and a heat-insulating and air-tight structure excellent in airtightness Is built. Therefore, it becomes possible to omit construction such as a vapor barrier.
Moreover, since the heat insulating material is arrange | positioned, it is possible to suppress heat conduction and to maintain a living space in a comfortable state.

  In addition, it is preferable that the heat insulating material is locked to the lower surface of the upper flange without a fixing means, because installation is easy. Further, since no adhesive or the like is used, separation becomes easy at the time of dismantling, and it is possible to provide a comfortable living space without affecting the indoor air quality.

In addition, an upper end surface of the beam member of the heat insulating and airtight structure is in contact with a plate material, and a ventilation layer that is inserted along the longitudinal direction of the beam member is formed between the heat insulating material and the plate material. For example, it is possible to obtain a heat convection transfer suppressing action and a moisture discharging action by circulating the outside air inside the heat insulating and airtight structure. Therefore, for example, when the heat insulating and airtight structure is used as a roof slab, air is circulated in the roof slab. It becomes possible to suppress the temperature rise in the plate. In addition, it is possible to suppress the occurrence of internal condensation in the roof slab.
Moreover, it becomes possible to raise the bending rigidity of a heat insulation airtight structure by providing a board | plate material and a wooden board | plate material side by side.

  In addition, when a heat shield sheet is installed on the surface of the heat insulating material opposite to the installation surface of the heat insulating material with the wooden board material, when the heat insulating airtight structure is used as a roof slab In addition, it is possible to shield the radiant heat from the outside of the roof and reduce the heat storage in the roof slab. Therefore, it is possible to prevent a rise in the temperature of the living space in the summer, which is preferable.

  Further, if the lower end surfaces of the plurality of beam members of the heat insulating and airtight structure are in contact with the decorative plate material, a space is formed between the structural plate material and the decorative plate material. Alternatively, this space can be used for ventilation, which is preferable.

  The heat insulating and airtight structure of the present invention makes it possible to construct a roof slab or floor slab that is excellent in heat insulating properties and airtightness.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. In the description, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.
Here, FIG. 1 is a partial perspective view showing a roof slab which is a heat insulating and airtight structure according to the first embodiment, and FIG. 2 is an exploded perspective view of the roof slab. FIGS. 3A to 3D are cross-sectional views showing a construction procedure of the roof slab according to the first embodiment, and FIGS. 4A to 4C are views of the construction method of the roof slab. It is sectional drawing which shows a modification. Furthermore, FIG. 5 is a partial perspective view showing an installation example of the roof slab according to the first embodiment.
FIG. 6 is a plan view showing the roof panel according to the second embodiment, and FIGS. 7A to 7C show a method for joining the roof panels according to the second embodiment. It is a fragmentary sectional view.

  As shown in FIG. 1, a roof slab (insulated and airtight structure) 1 according to the first embodiment includes a plurality of rafters (beam members) 2 and 2 arranged in parallel with a predetermined interval. ,..., A wooden board 3 that is laterally disposed on the adjacent rafters 2, and a heat insulating material 4 that is laterally disposed on the adjacent rafters 2, 2 while being disposed on the upper surface of the wooden board 3. It is configured.

  In the roof slab 1, the upper end surface of the rafter 2 is brought into contact with an underlay material (plate material) 5, and a ventilation layer 6 is formed between the heat insulating material 4 and the undercoat material 5.

Moreover, in 1st Embodiment, the heat insulation sheet 7 is installed in the surface on the opposite side to the installation surface with the wooden board | plate material 3 of the heat insulating material 4. As shown in FIG.
Furthermore, in the first embodiment, a decorative board material (or base board material) 8 is installed at the lower end of the roof slab 1.

  As shown in FIG. 1 or FIG. 2, the rafter 2 according to the first embodiment is a so-called I-shaped beam formed in an I-shaped cross section by an upper flange 2a, a lower flange 2b, and a web 2c. In the first embodiment, a wood composite shaft material is used as the rafter 2. However, the material of the rafter 2 is not limited, and structural lumber or laminated lumber may be used. .

  As the wooden board 3, a flat plate made of structural plywood or a wooden board is used, and its end is fixed to the upper surface of the lower flange 2 b of the rafter 2. That is, the wooden board 3 is mounted on the lower flange 2b, and is fixed by the joint n at a portion where the lower flange 2b and the end of the wooden board 3 overlap (see FIG. 2). Here, in this specification, the connector n is not limited as long as the member can be fixed, and may be appropriately selected from known ones such as nails, wood screws, staples, and the like. In addition, you may fix via an adhesive etc. other than the said connector n, for example. Needless to say, the material of the wooden board 3 is not limited to a structural plywood or a wooden board as long as it has a required strength performance.

As shown in FIG. 1 or FIG. 2, the heat insulating material 4 has the same width as the interval between the webs 2c, 2c of the rafters 2, 2 adjacent to each other, and the height of the wooden board 3 from the height of the web 2c. It is formed in a rectangular parallelepiped shape equivalent to the height minus the thickness. And the heat insulating material 4 is the state installed, and the edge part is latched by the lower surface of the upper flange 2a.
Further, a heat shield sheet 7 is installed on the upper surface of the heat insulating material 4 (the surface opposite to the installation surface with the wooden board 3). In addition, the heat shield sheet 7 shall be affixed on the heat insulating material 4 without a gap by an adhesive or the like.

  Here, the material which comprises the heat insulating material 4 is not limited, What is necessary is just to select and use from a well-known heat insulating member suitably. Moreover, the material which comprises the thermal insulation sheet 7 is not limited, It should just select and use from a well-known thermal insulation sheet material suitably. The heat shield sheet 7 is installed as necessary. For example, when the heat-insulated and airtight structure of the present invention is used as a floor slab, the heat shield performance is not required, so it is not installed. It goes without saying that it is also good.

  The underlay material 5 is a plate-like member as a base material for a roof material, and a flat plate made of a structural plywood or a wood board is used. And underlay material 5 is being fixed to the upper end (upper surface of upper flange 2a) of rafter 2 via connector n. And between the heat insulating material 4 (heat-shielding sheet 7) and the underlaying material 5, the ventilation layer 6 with the height of the upper flange 2a and the space | interval of the adjacent upper flange 2a is formed.

Furthermore, if the underlaying material 5 is used as a structure, it is possible to further increase the strength of the roof slab 1 by combining with the rafter 2 and the wooden board 3.
In addition, the underlay material 5 shall use the board | plate material which has required intensity | strength according to the intended purpose of the roof slab 1, and is not limited to a structural plywood or a wood board.

  The decorative board material 8 is a plate-like material made of, for example, a gypsum board, and is fixed to the lower flange 2b of the rafter 2 by a connector n. In addition, the decorative board material 8 should just be installed as needed, and does not necessarily need to be installed. Moreover, it cannot be overemphasized that the material, thickness, shape, etc. which comprise the decorative board material 8 are not limited.

  Next, with reference to Fig.3 (a)-(d), the construction method of the roof slab 1 which concerns on 1st Embodiment is demonstrated.

  First, as shown in FIG. 3A, the rafter 2 and the wooden board 3 are integrated. The rafter 2 and the wood board 3 are integrated by inserting the wood board 3 between two adjacent rafters 2, 2, and the left and right sides of the wood board 3 on the upper surface of the lower flange 2 b of the rafter 2. This is done by driving in the connector n with the end portion mounted. At this time, both side surfaces of the wooden board 3 are fixed in contact with the webs 2c, 2c of the rafters 2, 2.

Next, as shown in FIG.3 (b), the heat insulating material 4 is installed.
The heat insulating material 4 is installed by inserting the heat shield sheet 7 on the upper surface of the heat insulating material 4 and then inserting the heat insulating material 7 through the opening above the adjacent rafters 2 and 2. In the first embodiment, as the heat insulating material 4, an inorganic fiber material such as glass wool and made of a flexible material is used, and between the upper flanges 2 a and 2 a having a width narrower than the width of the heat insulating material 4. After the heat insulating material 4 is bent in a bow shape, the heat insulating material 4 bent in the bow shape is returned to the original state while being placed on the upper surface of the wooden board 3. At this time, both side surfaces of the heat insulating material 4 are in contact with the webs 2c and 2c of the rafters 2 and 2, and both end edges of the upper surface of the heat insulating material 4 (heat insulating sheet 7) are the upper flanges 2a and 2a of the rafters 2 and 2. It arrange | positions in the state latched by the lower surface. Therefore, since the heat insulating material 4 can be installed without using a separate fixing means, the installation work becomes easy.

  In addition, the installation method of the heat insulating material 4 is not limited to the said method, For example, when using what consists of inflexible materials, such as a foamed plastic type heat insulating material, as a heat insulating material, FIG. As shown in a), the heat insulating material 4 is divided into three in advance, the end heat insulating materials 4a and 4a and the central heat insulating material 4b, and the end heat insulating materials 4a and 4a at both ends are installed at predetermined positions, By installing the partial heat insulating material 4b, the heat insulating material 4 may be arranged in a state of being locked to the upper flange 2a. At this time, the cut surface of the heat insulating material is formed in a bowl shape (stepped shape) so that a heat bridge is not formed on the cut surface. Here, the division | segmentation number of the heat insulating material 4, the shape of the cut surface at the time of division | segmentation, etc. are not limited, What is necessary is just to set suitably.

Similarly, as another installation method in the case of using the inflexible heat insulating material 4, as shown in FIG. 4 (b), the wood-based plate material 3 and the heat insulating material 4 are placed on either one of the adjacent rafters 2 and 2. And the heat shield sheet 7 in advance, as shown in FIG. 4 (c), the other rafter 2 is installed, and the wooden board 3, the heat insulating material 4, and the heat shield sheet 7 are attached to the rafters 2 at both ends. , 2 may be used.
Here, it is needless to say that the material of the heat insulating material 4 is not limited to the inorganic fiber material or the foamed plastic material, and the installation method of the heat insulating material 4 is appropriately set according to the material of the heat insulating material 4. You only have to set it.

Next, as shown in FIG.3 (c), the base material 5 is installed.
The underlay material 5 is installed by placing the underlay material 5 above the plurality of rafters 2, 2,... Arranged in parallel, and connecting the joint n to the upper flanges 2a, 2a,. It is fixed by being driven in a state where the underlay material 5 is passed through. The fixing method of the underlaying material 5 is not limited to the method using the connector n, and may be appropriately selected from known methods, for example, using an adhesive.

Then, as shown in FIG.3 (c), the decorative board | plate material 8 is installed.
The decorative board material 8 is installed from below with the lower flanges 2b, 2b,... Passing through the decorative board material 8 with the fitting n in a state where the decorative board material 8 is in contact with the lower flanges 2b, 2b,. Do this by typing in Note that the fixing method of the decorative board material 8 is not limited to the method using the connector n, and may be appropriately selected from known methods such as using an adhesive.

  Thus, the roof slab 1 shown in FIG. A space 6 a is formed between the heat insulating material 4 (heat insulating sheet 7) and the underlay material 5, and between the wooden board 3 and the decorative board 8, at the upper and lower parts of the roof slab 1. Yes.

As shown in FIG. 5, the roof Y constituted by the roof slab 1 according to the first embodiment has the ventilation layer 6 formed on the top of the roof slab 1, so that air introduced from the outside is The ventilation layer 6 at the upper part of the roof Y is passed through to prevent heat from convection in the roof slab 1. And the air of the ventilation layer 6 becomes a structure exhausted from the exhaust port formed in the top part of the roof Y. As shown in FIG.
Here, reference numeral 10 denotes a roof material (exterior material) of the roof Y, and is fixed to the underlay material 5 of the roof slab 1 by a known means. Further, the roof ridge material 10 ′ of the ridge portion (vertex portion) of the roof slab 1 and the roof slab 1 connected to the mountain shape has an exhaust port that allows the air A vented through the ventilation layer 6 to be exhausted. It is installed in the state that it has.

  The structure (building) of the roof slab 1 may be fixed to the structural beam or column by appropriately known means.

  As described above, according to the roof slab 1 of the first embodiment, since it is not necessary to prevent the rafter 2 from rolling, it is possible to arrange the continuous heat insulating material 4 (and the heat shielding sheet 7), so-called heat bridge. It is possible to provide a comfortable living space without being formed.

Moreover, since the wooden board | plate material 3 is arrange | positioned over the whole roof slab 1, bending rigidity increases about the roof slab 1 which conventionally borne the intensity | strength only with the rafter 2. FIG. Therefore, the maximum span length in the structural design can be expanded. Therefore, intermediate support members such as beam receiving beams and columns can be omitted, and workability can be improved and material costs can be reduced.
Further, since the roof plate 1 is provided with the wooden board 3 and the underlay material 5, the bending rigidity of the roof plate 1 is further enhanced.

  Further, since a continuous layer of dry wood material is constructed by the lower flange 2b of the rafter 2 and the wooden board material 3, it is not necessary to form an airtight layer on the indoor side and to install an airtight member such as a vapor barrier. . Therefore, even when an airtight structure is constructed, the cost required for the airtight member can be reduced.

  In addition, the roof slab 1 has a heat convection transfer suppression effect due to the outside air conduction of the ventilation layer 6, a radiant heat reflection effect due to the heat shield sheet 7, and a heat conduction suppression effect due to the heat insulating material 4. It is possible to suppress heat transfer and to construct a more comfortable living space. Therefore, for example, it is possible to increase the operating efficiency of air conditioning, and it is possible to provide a comfortable living space with energy saving.

  Further, when installing the lighting etc. on the roof slab 1, if the lighting etc. is fixed to the lower flange 2 b, it is not necessary to install a trunk edge or the like, so it is possible to omit the labor and material cost of construction. . Moreover, since wiring for illumination etc. should just be performed in the space 6a formed between the wood type board | plate material 3 and the decorative board | plate material 8, concealment wiring is attained without impairing an internal appearance, and is suitable.

  Further, the space 6a facilitates exhaust or ventilation of room air. Furthermore, since warm air rises along the roof slope, an efficient air flow can be expected.

  Moreover, since fixing of the heat insulating material 4 is completed only by engaging with the upper flange 2a, an adhesive or the like is not used. For this reason, the use of building materials that cause so-called sick houses is suppressed, and there are few adverse effects on residents.

<Second Embodiment>
Next, the case where the roof panel P previously formed in a predetermined shape is used as the roof slab 1 will be described with reference to FIGS. 6 and 7.

The roof slab 1 may be constructed on site according to the procedure shown in the first embodiment. However, for the purpose of shortening on-site construction, as shown in FIG. It is possible to shorten the site construction by forming the roof panel P and using it. The roof panel P is formed in a size and shape that can be easily handled by human power and can be transported by a truck or the like. For example, the width is about 1.8 m and the length is about 5.5 m. In addition, it cannot be overemphasized that the shape dimension of the roof panel P is not limited. Moreover, since the wooden panel 3 is disposed on the roof panel P, the cross-sectional shape is stable, and panelization is easy.
Since the construction method of the roof panel P is performed by the same method as the method shown in the first embodiment, the detailed description is omitted.

  When the roof panel P is continuously installed in the longitudinal direction, the roof panel P is connected to the upper surfaces of the rafters 2, 2,. The other ends of the roof panel P are continuously connected by overlapping the underlaying material 5 installed in a state of protruding from the rafters 2, 2,... And fixing them with a joint n such as a nail. Needless to say, when the roof panels P are not continuously connected in the longitudinal direction, the roof panels P are formed without protruding the rafters 2, 2,.

  Further, the connection of the roof panel P in the horizontal direction (left and right direction in FIG. 6) fixes the wooden board 3 and the underlaying material 5 on the side of the roof panel P ′ connected to the rafter 2 at the end of the adjacent roof panel P. (See FIGS. 7A to 7C).

For example, as shown in FIG. 6 and FIG. 7A, the rafter 2 is disposed at one end in the lateral direction of the roof panel P, and the height of the web 2c of the rafter 2 is disposed at the other end. The roof panel P is constructed in a state where the joint material 9 formed according to the above is arranged. Then, as shown in FIG. 7 (a), the adjacent roof panels P and P ′ are joined to the rafters 2 arranged at the end of one roof panel P and the joint 9 of the other roof panel P ′. And is fixed through the connector n.
That is, between the upper flange 2a and the lower flange 2b of the rafter 2 of one roof panel P, the joint material 9 and the wooden board 3 of the other roof panel P ′ are inserted, and the other roof panel P ′ By inserting the upper flange 2a of one roof panel P between the underlay material 5 and the joint material 9, the end portions of the roof panel P are engaged and fixed. Here, reference numeral 9 a in FIG. 7A is an auxiliary member for fixing the joint material 9.

In addition, the connection method of the roof panels P and P ′ is not limited. For example, as shown in FIG. 7B, one roof is not required without using the joint material 9 (see FIG. 7A). The upper flange 2a of the panel P is inserted between the underlaying material 5 and the heat insulating material 4 of the other roof panel P ′, and the other roof panel is interposed between the upper flange 2a and the lower flange 2b of one roof panel P. You may connect by inserting the wooden board | plate material 3 and the heat insulating material 4 of P ', and mutually meshing. Then, the joint n is driven into the upper flange 2a of one roof panel P in a state of passing through the underlaying material 5 of the other roof panel P ', and the joint n is passed through the lower flange 2b of one roof panel P. Is fixed to the other roof panel P ′ by driving it into a wooden board. At this time, an end member 12 made of a steel plate processed in the same shape as the shape of the rafter 2 of the one roof panel P is installed at the end of the other roof panel P ′ on the one roof panel P side. . The end member 12 prevents the roof panel P ′ from being damaged when the roof panel P ′ is transported or attached. Needless to say, the end member 12 may be omitted if necessary. Furthermore, the material and shape of the end member 12 are not limited as long as the shape of the end portion of the roof panel P ′ can be maintained.
With this configuration, since the heat insulating material 4 is continuously arranged except for the thickness of the web 2c of the rafters 2 at the joint portion of the roof panels P and P ′, it is possible to construct the roof Y having more excellent heat insulating properties. It becomes possible.

  In addition, when the rafters 2 are arranged at the ends of either one of the roof panels P and the other roof panel P ′, both the rafters 2 and 2 are brought into contact with each other as shown in FIG. Connection may be performed by disposing the joining material 9 'in the space corresponding to the webs 2c, 2c formed by the above and fixing the rafters 2, 2 to the joining material 9'. At this time, if the joint member 9 ′ is fixed to the rafter 2 of the other roof panel P in advance, the connection work can be performed simply by inserting the joint member 9 ′ into the rafter 2 of the one roof panel P. Since it engages, the workability is improved, which is preferable.

As described above, if the roof panel P is used, the construction of the roof slab (or floor slab) can be completed simply by joining a predetermined number of roof panels P to each other. is there.
In addition, since the effect by this other roof panel P is the same as the effect of the roof slab 1 shown in 1st Embodiment, detailed description is abbreviate | omitted.

As mentioned above, although preferred embodiment was described about this invention, this invention is not limited to said each embodiment, A design change is possible suitably in the range which does not deviate from the meaning of this invention.
For example, in each of the above-described embodiments, the heat-insulating and air-tight structure of the present invention is used as a roof slab or a roof panel, but it goes without saying that it may be used as a floor slab or a floor panel. The place where the structure is used is not limited.

  In each of the above embodiments, the I beam is used as the rafter. However, it is not limited to the I beam as long as the building member is composed of upper and lower flanges and a web and exhibits a predetermined strength. Needless to say, for example, an H beam may be used.

  Moreover, when using a heat insulation airtight structure as a floor slab, it cannot be overemphasized that a ventilation layer may be used as space for piping and wiring.

It is a fragmentary perspective view which shows the heat insulation airtight structure concerning 1st Embodiment. It is a disassembled perspective view of the heat insulation airtight structure concerning 1st Embodiment. (A)-(d) is sectional drawing which shows the construction procedure of the heat insulation airtight structure concerning 1st Embodiment. (A)-(c) is sectional drawing which shows the modification of the construction method of the heat insulation airtight structure concerning 1st Embodiment. It is a fragmentary perspective view which shows the example which used the heat insulation airtight structure concerning 1st Embodiment as a roof slab. It is a top view which shows the roof panel formed of the heat insulation airtight structure of 2nd Embodiment. (a)-(c) is a fragmentary sectional view which shows the joining method of the roof panel which concerns on 2nd Embodiment. It is a fragmentary perspective view which shows the conventional heat insulation airtight structure.

Explanation of symbols

1 Roof slab (insulated and airtight structure)
2 Rafters (beam members)
2a Upper flange 2b Lower flange 2c Web 3 Wood-based board material 4 Heat insulating material 5 Substrate material 6 Ventilation layer 7 Thermal insulation sheet P Roof panel Y Roof

Claims (5)

A plurality of beam members composed of a web and upper and lower flanges and arranged in parallel with a predetermined interval;
A wood-based plate material that is laterally disposed adjacent to the beam member and whose end is fixed to the upper surface of the lower flange of the beam member;
A heat insulating material that is horizontally disposed on the adjacent beam member and disposed on an upper surface of the wooden board;
A heat-insulating and air-tight structure characterized by containing.   The heat insulating airtight structure according to claim 1, wherein the heat insulating material is locked to a lower surface of the upper flange.   The heat insulating and airtight structure according to claim 1 or 2, wherein an upper end surface of the beam member is brought into contact with a plate material, and a ventilation layer is formed between the heat insulating material and the plate material. body.   The heat insulation airtightness according to any one of claims 1 to 3, wherein a heat shield sheet is installed on a surface of the heat insulating material opposite to a surface on which the wooden board is installed. Structure.   5. The heat insulating and airtight structure according to claim 1, wherein lower end surfaces of the plurality of beam members are in contact with a decorative plate material. 6.

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