JP2002364091A - Outer wall structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outer wall structure which sets the vapor release speed in a wall body to a large value to improve condensation preventing effect, is excellent in strength, maintains air-tightness in a room, and is low in production cost. SOLUTION: The outer wall structure is constructed according to a wood frame construction method with a venting construction method applied thereto. According to the outer wall structure, a frame wall 2 is erected, which has a waterproof vapor-permeable sheet 3 stuck to an outside thereof, and a venting corbel 5 of a predetermined size, formed of a woody laminate which is obtained by laminating and bonding woody veneers together, is mounted on vertical frames (studs) 4 of the frame wall 2 from above the waterproof vapor-permeable sheet 3. Then, an outer wall panel 12 is stuck to the venting corbel 5, and a vent passage 14 is defined between the outer wall panel 12 and the waterproof vapor-permeable sheet 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a durable outer wall structure having a large wall magnification, and more particularly to a durable outer wall structure having a ventilation construction method for preventing the formation of dew inside the outer wall.

[0002]

2. Description of the Related Art A framed wall construction method (two-by-four construction method) with a ventilation construction method for preventing dew condensation inside an outer wall.
As shown in FIG. 3, a board such as OSB as a base plate 53 and a plywood for a structure are provided on the outdoor side surface of a vertical frame (stud) 52 of a framed wall 51 as shown in FIG. It is covered with a waterproof and moisture permeable sheet 54 that allows moisture to pass but does not allow moisture to pass therethrough, and a ventilation receiver 55 made of Muku material is attached from above the waterproof and moisture permeable sheet 54. An outer wall panel 56 of siding or the like is attached to the
A structure in which a ventilation path 57 is provided between the two is known.

However, in such an outer wall structure, since the moisture permeability of the base plate 53 such as boards or structural plywood is large, the rate of release of water vapor in the wall is low, and condensate is generated in the wall. There is a problem that the wall structure member such as a frame member may rot due to moisture.

[0004] To solve this problem, Japanese Patent Laid-Open No.
Japanese Patent Application Laid-Open No. 5331/1993 and Japanese Patent Application Laid-Open No. 5-280110 disclose that ventilation holes are provided at appropriate places in a plywood for a base structure to release moisture and prevent dew condensation from occurring.

According to Japanese Utility Model Laid-Open Publication No. 7-13918, a wall base material is attached to a vertical member of a framed wall through a spacer via a spacer. It is disclosed that a gap for ventilation is formed between the plywoods, and a through hole for ventilation is formed in a portion of the structural plywood for the floor surface facing the gap.

[0006]

However, in JP-A-5-5331 and JP-A-5-280110, since the plywood for the underlayer structure is attached and the ventilation holes are provided, the time and labor required for the plywood are reduced. Not only does this increase the cost, but it also requires a considerable vent area to bring the water vapor release rate in the wall to a practical level, and if the vent area is too large, the venting material will be made of Muku material In the case of a frame material or the like, there is a problem that the strength as the outer wall structure, that is, the wall magnification is reduced.
As described above, it has been extremely difficult to increase the water vapor release rate in the wall to a practical level to prevent dew condensation, and to maintain the strength of the outer wall structure, that is, the wall magnification.

[0007] In addition, since much emphasis is placed on prevention of dew condensation, boards and structural plywood are omitted, and a waterproof and moisture permeable sheet 54 is directly attached on the vertical frame (stud) 52 of the framed wall 51.
The vertical frame 5 of the framing wall 51 is placed on the waterproof / moisture permeable sheet 54 from above.
2, an attachment member 55 for ventilation was attached, and it was also attempted to attach an outer wall panel 56 on the attachment member 55 for ventilation.
In the case where the ventilation receiving material 55 is a body edge material or the like made of Muku material,
Similarly to the above, the strength of the outer wall structure, that is, the wall magnification is reduced, and especially when an external force is applied due to an earthquake or the like, the ventilation receiving material 55 is cracked or deformed, and is cracked or dropped at the joint of the outer wall panel 56. Etc. may occur.

On the other hand, in Japanese Utility Model Laid-Open Publication No. 7-13918, a ventilation hole is provided in the structural plywood for the floor surface via a spacer, so that drafts are generated from under the floor to the indoor side. It was easy to enter, the cooling and heating effect was reduced, and there was a problem in living comfort.

[0009] The present invention has been made in view of the above-mentioned circumstances, and increases the water vapor release rate in the wall to improve the effect of preventing dew condensation, has excellent strength, and maintains the airtightness of the indoor side. An object of the present invention is to provide an outer wall structure that reduces costs.

[0010]

According to a first aspect of the present invention, there is provided an outer wall structure by a framed wall construction method in which a ventilation construction method is applied, wherein a waterproof and moisture permeable structure is provided outside the framed wall. A sheet is stuck, and a ventilation receiving material of a predetermined size made of a wooden laminated material obtained by laminating and bonding wooden veneers is attached to the vertical frame of the framework wall from above the waterproof moisture-permeable sheet, An outer wall panel is stuck on the ventilation receiver, and a ventilation path is provided between the outer wall panel and the waterproof and moisture-permeable sheet.

[0011] With this configuration, the base plates such as boards and structural plywood can be omitted, thereby eliminating moisture permeation resistance, increasing the water vapor release rate in the wall, and allowing the water vapor in the wall to pass through the waterproof and moisture permeable sheet. Then, it is possible to easily and surely release it to the outside. Therefore, in addition to the effect of preventing dew condensation in the wall, due to the drying in the wall, the durability of the frame member and the heat insulating property of the heat insulating material are further improved. In addition, since the receiving material for ventilation is not wood material but wood laminate material, the wood laminate material is less likely to be disturbed or cracked than the wood material, and has excellent nail holding force and material shearing force. Since it is possible to obtain a large outer wall structure, a decrease in strength due to omitting the base plate can be sufficiently compensated for by the wooden laminate, and an outer wall structure having excellent strength can be obtained. Also,
Since the deformation of the ventilation material is suppressed, it is possible to effectively prevent the surface finishing material from cracking at the joint of the outer wall panel. In addition, by omitting the base plate, the wall thickness of the outer wall structure can be reduced correspondingly, and the weight can be reduced. Further, the number of parts and the number of working steps are reduced, so that the cost can be further reduced. In addition, the airtightness of the indoor side is maintained, and the cooling / heating effect can be prevented from lowering.

According to a second aspect of the present invention, the wooden laminated material according to the first aspect is a plywood obtained by laminating and bonding a plurality of wooden veneers with their fiber directions orthogonal to each other.

[0013] With this structure, since the wood laminates serving as the ventilation receivers have the fiber directions of the wooden veneers orthogonal to each other, there is less streaking and irregularity due to fluctuations in the moisture content of the ventilation receivers. And wall strength can be further improved.

According to a third aspect of the present invention, there is provided a parallel plywood comprising a plurality of the wooden laminates according to the first aspect, in which a plurality of the wooden veneers are laminated and adhered so that fiber directions of the wooden veneers are parallel to each other. At least one of the wood veneers is a parallel plywood in which the fiber direction of the wood veneer is orthogonal to the other wood veneer layers.

[0015] With this configuration, since there is a wood veneer layer in which the fiber direction is orthogonal to the other wood veneer layers as compared with a wood laminated material in which all the wood veneer layers are parallel, the water-containing material for the ventilation is provided. Abareness and irregularity due to the rate change are reduced and stable, and the wall strength can be further improved.

According to a fourth aspect of the present invention, the thickness of the wood laminate according to the second or third aspect is 7 to 30 mm.

With such a configuration, the thickness of the wooden laminated material is set to 7
mm or more, the strength as the outer wall structure, that is, the strength for maintaining the wall magnification can be obtained more reliably, and the thickness of the wooden laminated material is set to 30 mm or less to reduce the weight of the outer wall structure. Can be obtained more effectively.

According to a fifth aspect of the present invention, there is provided a method according to any one of the first to fourth aspects, wherein a part or all of the vertical frames provided at predetermined intervals on the frame wall are plural. The ventilation receiving member is attached so as to straddle each of the plurality of vertically arranged vertical frames, and the outer wall panel has a joint having a width corresponding to the width of the ventilation receiving member. It is characterized in that it is attached so as to be located within the range.

With such a configuration, a plurality of vertical frames are partially or wholly arranged side by side, so that the strength is improved. In addition, each of the vertical frames formed side by side is formed. Since the ventilation receiver is attached so as to straddle each vertical frame, the vertical frames are integrated, and the outer wall panel has a joint portion located within the width of the ventilation receiver. As a result, the movement of each vertical frame is effectively suppressed by the outer wall panel, and the strength as the outer wall structure, that is, the strength for maintaining the wall magnification can be more reliably obtained. . Further, since the movement of each vertical frame is effectively suppressed, it is possible to effectively prevent the surface finishing material at the joint of the outer wall panel from cracking, falling off, and the like.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the outer wall structure according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partially cutaway front view showing an embodiment of the outer wall structure of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG.

The outer wall structure 1 as the outer wall structure by the framed wall construction method (two-by-four construction method) provided with the ventilation construction method shown in this embodiment has a waterproof moisture-permeable sheet 3 adhered to the outdoor side of the framed wall 2, A predetermined size ventilation receiving material 5 made of a laminated wooden material obtained by laminating and bonding wooden veneers is attached to the vertical frame (stud) 4 of the framed wall 2 from above the wet sheet 3 with nails 6. Have been. Furthermore, in this example, a ventilation receiving material 10 is attached to the end joist 7 on the second floor portion and the end joist 8 on the first floor portion and the base 9 of the frame wall 2 with nails 11. Reference numeral 12 denotes an outer wall panel, which is fixed on and attached to the ventilation receivers 5 and 10 by nails 13. A ventilation path 14 is provided between the outer wall panel 12 and the waterproof and moisture permeable sheet 3 with the ventilation receiving members 5 and 10 serving as spacers. Reference numeral 15 denotes an upper frame, 16 denotes a lower frame, 17 denotes a head connection, 18 denotes a foundation, and 19 denotes a heat insulating material.

The vertical frames 4 provided at predetermined intervals on the framed wall 2 are alternately provided in the present embodiment as two, one, two, one,... The reason why the two vertical frames 4 are intermittently arranged side-by-side with their side surfaces in contact is to reinforce the fixing of the joint of the outer wall panel 12 and more reliably maintain the strength as the outer wall structure, that is, the strength for maintaining the wall magnification. To get it. Here, the reason why the two pieces are used is that in the framed wall construction method (two-by-four construction method), since the dimensions of the vertical frame 4 are standardized, the two pieces are used in order to obtain a thickness necessary for maintaining strength. If more strength is required, it may be three or more. Also, it is not always necessary to be intermittent, and these are appropriately selected for some or all of the vertical frames 4 according to the required strength. In this way, if a plurality of the vertical frames 4 are juxtaposed as necessary and the vertical frames 4 are joined together by sewing the nails or the like (not shown) from the side surfaces of the vertical frames 4, the strength is further assured. become.

The receiving member 5 for ventilation has a length of 50 to 65 m.
It is nailed with m nails 6 (the nail pitch is 100 to 300 mm pitch; an adhesive may be used together). Further, the ventilation receiving material 5 is attached to the vertical frame (stud) 4 of the framed wall 2, but as described above, a plurality of the vertical frames 4 in the vertical frame 4 (two in this example). In the case of a plurality of juxtaposed, the ventilation receiving members 5 are attached so as to straddle each of the vertical frames 4 formed of a plurality of juxtaposed. Further, the size of the ventilation material 5 is the same as that of the outer wall panel 1.
2 is a ventilation path provided between the waterproof and moisture-permeable sheet 3
4 are set in accordance with the gaps forming the gaps 4.

The ventilation receiver 10 is, similarly to the ventilation receiver 5, a nail 11 having a length of 50 to 65 mm (a nail pitch of 100 mm).
ピ ッ チ 300 mm pitch. (An adhesive may be used together.)
It is nailed in. The size of the ventilation receiver 10 is set according to the gap forming the ventilation path 14 provided between the outer wall panel 12 and the waterproof and moisture permeable sheet 3.

The ventilation receiving material 5 and the ventilation receiving material 10
Is made of a wood laminate obtained by laminating and bonding a plurality of wood veneers of a predetermined thickness with an adhesive as described above. As the wood laminated material, there is a so-called plywood in which the wood fiber directions of veneers are orthogonal to each other, and a so-called parallel plywood (LVL) in which the wood fiber directions of the veneer are parallel to each other. There are ordinary plywood and structural plywood depending on the water resistance of the adhesive. It is best to use structural plywood specified in Japanese Agricultural Standards. On the other hand, in the parallel plywood, the fiber direction may be parallel to all veneers, but the fiber direction of at least one veneer of each veneer of the parallel veneer is the same as the other veneer layers. If the special parallel plywood is orthogonal, the splitting strength is further increased, the fixing force of each nail is increased, and the wall strength is optimized. As an example, a single plywood of a second layer from the front surface and a second layer from the back surface of the parallel plywood is orthogonal to each other. The plywood and the parallel plywood may be an odd number or an even number of veneers.

As described above, when the ventilation receiving material 5 and the ventilation receiving material 10 are made of a wood laminate such as plywood or parallel plywood,
There is an advantage that swelling, contraction, and warping due to surrounding moisture and moisture are less likely to occur as compared with the conventional aeration material receiving material for ventilation. In other words, the abrasion and irregularity caused by the fluctuation of the water content are reduced as compared with the conventional muku wood, and the wood becomes stable. Therefore, the smoothness of the surface of the ventilation receiving material 5 and the ventilation receiving material 10 is ensured, and when the outer wall panel 12 is fixed to the ventilation receiving materials 5 and 10 with the nail 13, the outer wall panel 12 is stabilized. A wall having high in-plane shear strength is obtained because smoothness and nail holding force are obtained. The outer wall panel 12 is fixed with nails or screws having a length of about 50 mm (pitch is about 100 to 200 mm) (may be used together with an adhesive).

Further, when the ventilation receiver 5 is mounted so as to straddle the plurality of vertical frames 4 arranged in parallel, the vertical frame due to the external force applied to the wall is provided. There is an advantage that the movement of No. 4 can be effectively sealed. Accordingly, the movement and displacement of the joint of the outer wall panel 12 stuck thereon can be suppressed, and the occurrence of cracks or the like in the surface finishing material at the joint of the outer wall panel 12 can be effectively prevented. Further, in a place where a plurality of the vertical frames 4 are juxtaposed, the ventilation receiving material 5 wider than usual can be used, so that the wall strength is further improved.
In addition, when the joint of the outer wall panel 12 is located substantially at the center in the width direction of the ventilation receiving material 5, the wall strength is further improved (cracking of the surface finishing material at the joint of the outer wall panel 12). Is effectively prevented).

Optimally, the dimensions of the ventilation receiving material 5 and the ventilation receiving material 10 are such that the thickness of the laminated wooden material is about 7 to 30 mm. By setting the thickness of the wooden laminated material to 7 mm or more, the strength as the outer wall structure, that is, the strength for maintaining the wall magnification can be more reliably obtained.
Further, by making the thickness of the wooden laminated material 30 mm or less, the weight of the outer wall structure can be more effectively reduced. On the other hand, when the vertical frame 4 is a single portion, the width is preferably about 30 to 40 mm as a dimension corresponding to the width of the vertical frame 4. In the case of two or more locations, the width shall be appropriate. For example, in the case of two places, it is preferable that the distance be about 45 to 80 mm. On the other hand, the length dimension may be a length commensurate with the length dimension of the framed wall construction base structure. Although there may be a joint in the length direction, a single joint is more optimal in terms of wall strength. Incidentally, in the case of the conventional ventilation receiving material 55 (see FIG. 3) made of Muku material, if the thickness is less than 18 mm, the conventional ventilation receiving material 55 (see FIG. 3) is easily broken or warped. The nail holding force is reduced, and thus the wall strength is reduced. In this regard, since the ventilation receiving material 5 and the ventilation receiving material 10 according to the outer wall structure of the present invention are made of a laminated wooden material, this does not occur even if the thickness is less than 18 mm.

The vertical frame 4 and the upper frame 1 constituting the framed wall 2
5, lower frame 16 etc. are made of Tsuga material, Hemlock material, Spruce material,
Although materials such as cedar, hinoki, and laminated materials of these materials are used, other materials may be used. As the wood species of the wood laminated material used for the ventilation receiving material 5 and the ventilation receiving material 10, Rawan, Jonkon, Meranti, Kapole, Aviton and the like are used, but hardwood or conifers other than these may be used. The thickness of veneer is 0.7-3.0mm
Some are used, but not limited to this range. Further, the thickness of each veneer may be changed.

In addition, the ventilation receiving material 5 and the ventilation receiving material 1
As 0, a material which has been treated with insect repellent, preservative, and termite may be used. In this case, the durability of the ventilation receiver 5 and the ventilation receiver 10 is further improved, and thus the wall strength is optimal. In the treatment of insect repellents, preservatives, and termites,
A predetermined amount of an insect repellent, an antiseptic, and an anti-termitic agent may be mixed into the adhesive for laminating and bonding the wooden veneers constituting the wooden laminated material.
The mixing amount may be 1 to 2% by weight with respect to the adhesive, and care should be taken because too much mixing may cause poor adhesion. For example, borax, boric acid, sodium fluoride, phoxime, fenitrothion, and other agents can be used as insect repellents. In the case of borax and boric acid, the amount of the chemical permeated into the veneer may be 0.2% or more based on the total dry weight of the veneer. In the case of sodium fluoride, it may be 0.1% or more. As the laminating adhesive, an ordinary plywood adhesive made of a urea-based resin may be used, but a phenolic resin-based adhesive or another water-resistant adhesive can be used in consideration of water resistance.

The framing wall 2 is manufactured and constructed by a conventional method. The base 9, the foundation 18, and the like may be conventional ones. The waterproof / moisture permeable sheet 3 allows moisture to pass through but does not allow moisture to pass through, and is attached using staples or the like. As the waterproof and moisture-permeable sheet 3, for example, "Tyvek" manufactured by DuPont is often used.

According to the outer wall structure according to the present invention, conventional base plates such as boards and structural plywood can be omitted.
This eliminates the resistance to moisture permeation and increases the rate of water vapor release in the wall. And the water vapor | steam in a wall body can be easily and reliably discharged | emitted by passing a waterproof moisture-permeable sheet. Therefore, the effect of preventing dew condensation can be further improved. In addition, since the ventilation receiving material 5 and the ventilation receiving material 10 are made of a wooden laminated material instead of a conventional lumber material, the materials are hardly disturbed and the nail holding force and the shearing force of the material are excellent,
As a result, it is possible to obtain an outer wall structure having a large wall magnification. Therefore, the decrease in strength due to the omission of the conventional base plate can be sufficiently compensated for by the wooden laminate, and an outer wall structure having excellent strength can be obtained. In addition, since the deformation of the ventilation receiving material 5 and the ventilation receiving material 10 is suppressed, it is possible to effectively prevent the surface finishing material at the joint of the outer wall panel 12 from cracking or the like. Also, by omitting the conventional base plate,
As a result, the wall thickness of the outer wall structure can be reduced, and the weight can be reduced. In addition, the number of parts and the number of working steps are reduced, so that cost can be reduced. In addition, since the structure is not provided with a through hole for ventilation as in the related art, the airtightness on the indoor side is maintained, so that the cooling / heating effect can be prevented from lowering.

[0033]

EXAMPLE Next, a wall proof test was carried out based on Examples 1 to 4 and Comparative Examples 1 and 2, and the outer wall structure according to the present invention was sufficiently reduced in strength by omitting the conventional base plate with a wood laminate. To prove that the outer wall structure has excellent strength (compare the wall magnification results of Examples 1 to 4 with the wall magnification result of Comparative Example 1). Further, it is proved that the outer wall structure having a large wall ratio is obtained by using the wood laminated material instead of the lumber member as the ventilation receiver (the wall ratio results of Examples 1 to 4 and the wall ratio of Comparative Example 2). Compare the results). [Example 1] An outer wall structure by a frame wall method was produced as follows. Uses rice toga wood as a tree species, consisting of upper frame, lower frame, vertical frame (stud), height of 2730 mm, width of 1820
An outer wall structure having a thickness of 90 mm and a thickness of 90 mm by a framing wall method was produced. Studs are 910 where the joint of the outer wall panel comes
Two studs were arranged at an interval of mm, and one stud was arranged at an intermediate position. The cross-sectional dimensions of the upper frame, lower frame, and stud are 40
A 2-by-4 mm × 90 mm material was used. next,
A waterproof and moisture-permeable sheet was attached to the outer surface side. Subsequently, a ventilation receiver made of a wooden laminated material was inserted into a 65 mm long nail (CN-
65), nailing pitch 2 on the upper frame, lower frame and stud
00 mm, and a 50 mm long nail (C
N-50), the outer wall panel was attached at a nailing pitch of 100 mm. The dimensions of the ventilation receiving material were 7.0 mm in thickness, and the width was 80 mm in the place where two studs were stacked and 40 mm in the place of one stud. Length is 273 each
0 mm. As the outer wall panel, a lightweight mortar layer composite plywood “trade name: LASTOP 15” manufactured by our company was used. The size was 15 mm in thickness, 2730 mm in length, and 910 mm in width. Laststop's lightweight mortar layer was 7.0 mm, and the plywood layer was a 7.5 mm thick structural plywood. The wood laminate used for the ventilation material was a structural plywood using a phenolic resin adhesive. The fiber direction of each veneer is orthogonal to each other. As a veneer species, lauan wood was used, and the veneer thickness was 1.0 mm. The number of laminated plies is equal to 7 plies, and the finished thickness is 7.0
mm. It conforms to the Japanese Agriculture and Forestry Standard for structural plywood.

Example 2 The thickness of the veneer was 2.8 mm, the thickness of the veneer was 11 plies, and the finished thickness of the ventilation material was 2 mm. An outer wall structure of the framing wall method of Example 2 was produced in the same manner as in Example 1 except that the length was 30 mm.

[Example 3] As a wood laminate used for a ventilation receiving material, the thickness of a veneer was 1.0 mm, and the fiber direction of each veneer was the second veneer from the front surface and the two veneers from the back surface. The veneer veneer is an orthogonal veneer, the other veneers are parallel to each other, and the laminated veneer is a laminated veneer having a 7-ply equal thickness veneer having a finished thickness of 7.0.
An outer wall structure of the framing wall construction method of Example 3 was produced in the same manner as in Example 1 except that a special parallel plywood of mm was used.

Example 4 As a wood laminated material used for the ventilation receiving material, the thickness of the veneer was 2.8 mm, and the fiber direction of each veneer was the second veneer from the front surface and the two veneers from the back surface. The single veneer is an orthogonal veneer and the other veneers are
Finish thickness 3 laminated and bonded in a single-ply construction with equal thickness of ply
An outer wall structure of the framing wall method of Example 4 was produced in the same manner as in Example 1 except that a special parallel plywood of 0.0 mm was used.

[Comparative Example 1] 5 plies 9.0 on the upper frame, lower frame, and vertical frame (stud) of the outer wall structure of the framed wall method.
Structural plywood having a thickness of 910 mm and a length of 2730 mm, with a thickness of mm, was laminated and attached in the width direction. An outer wall structure of Comparative Example 1 was formed in the same manner as in Example 1 except that a waterproof and moisture-permeable sheet was adhered thereon, and then a ventilation receiving material made of a 18 mm thick muk material was attached thereon. Was prepared.

Comparative Example 2 The outer wall structure of the framing wall construction method of Comparative Example 2 was the same as that of Example 1 except that an 18 mm thick ventilation receiving material made of chalk was used as the ventilation receiving material. The body was made.

[Wall Strength Test] The outer wall structures of Examples 1 to 4 and Comparative Examples 1 and 2 were fixed to a test table with hole-down hardware, and an in-plane shear test was performed to compare wall magnifications. The test was performed in a non-loading manner, with positive and negative alternating repetitive forces applied from the side of the upper frame at the top, and apparent shear deformation angles of 1/450, 1
/ 300, 1/200, 1/150, 1/100, 1 /
At the time of positive / negative deformation of 75, 1/50 radian, after applying force repeatedly three times in the same cycle, it is destroyed by monotonous force,
After reaching the maximum load, the specimen was applied until the deformation angle of the specimen reached 1/30 radian or more. The short term allowable shear force was calculated from the test values, and the apparent wall magnification was calculated.

[Test Results] The results of the tests (wall magnification) are shown in Table 1.

[Table 1]

[0041]

As described above, according to the outer wall structure according to the present invention, the effect of preventing dew condensation is enhanced by increasing the rate of water vapor release in the wall, and the strength is excellent, and the airtightness of the indoor side is maintained. Further, it is possible to provide an outer wall structure in which cost is reduced.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of an outer wall structure of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a cross-sectional view showing an outer wall structure for a ventilation construction method in a conventional frame wall method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer wall structure 2 Framed wall 3 Waterproof and moisture permeable sheet 4 Vertical frame (stud) 5, 10 Ventilation receiving material 6, 11, 13 Nail 7, 8 End joist 9 Base 12 Outer wall panel 14 Ventilation path 15 Upper frame 16 Lower frame Reference Signs List 17 Head connection 18 Foundation 19 Insulation material 51 Frame wall 52 Vertical frame (stud) 53 Base plate 54 Waterproof and moisture-permeable sheet 55 Ventilation receiving material 56 Outer wall panel 57 Ventilation path

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E001 DB02 EA08 FA04 GA12 GA24 GA48 GA63 HC02 HF01 NA07 NB05 NC01 ND12 2E002 EA01 EA02 EB12 FA03 FB07 FB16 HB01 JA01 JA02 JB01 MA27 NA04

Claims (5)

[Claims] 1. An outer wall structure by a framing wall construction method to which a ventilation construction method is applied, wherein a waterproof moisture permeable sheet is attached to the outside of the framing wall, and a vertical frame of the framing wall is placed on the waterproof moisture permeable sheet. A ventilation receiving material of a predetermined size made of a wooden laminated material obtained by laminating and bonding wooden veneers is attached, and an outer wall panel is attached to the ventilation receiving material, and the outer wall panel and the waterproof material are attached. An outer wall structure, wherein an air passage is provided between the outer wall and the moisture permeable sheet. 2. The outer wall structure according to claim 1, wherein the wooden laminated material is a plywood obtained by laminating and bonding a plurality of wooden veneers so that the fiber directions of the wooden veneers are orthogonal to each other. 3. The wooden veneer according to claim 1, wherein the wooden laminated material is a parallel plywood in which a plurality of laminated wooden plywoods are laminated and bonded so that fiber directions of the wooden plywood are parallel to each other. Among them, at least one is a parallel plywood in which the fiber direction of said wood veneer is orthogonal to another wood veneer layer. 4. The outer wall structure according to claim 2, wherein the thickness of the wooden laminated material is 7 to 30 mm. 5. The outer wall structure according to claim 1, wherein a plurality of part or all of the vertical frames provided at predetermined intervals on the frame wall are arranged side by side. The ventilation receiving material is attached so as to straddle each of the plurality of vertical frames that are arranged side by side, and the joint portion of the outer wall panel is within the width of the ventilation receiving material. An outer wall structure that is attached so as to be positioned.