JP2013060806A - Inclined roof structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inclined roof structure for surely preventing the occurrence of dew condensation and securing heat insulating performance, without the existence of a vent layer below a roof surface.SOLUTION: The inclined roof structure includes a pair of inclined roofs formed by placing roof panels which are formed by putting plate-like airtight heat insulating materials in close contact with the whole reverse faces of roofing boards forming the roof surface, and a relay airtight heat insulating material laid between the airtight heat insulating materials of the pair of inclined roofs, wherein an under-ridge space is provided between a ridge part formed on the side of the ridge side end of each of the pair of inclined roofs and the relay airtight heat insulating material, and an opening is formed in the ridge part in communication with the under-ridge space.

Description

  The present invention relates to an inclined roof structure.

2. Description of the Related Art Conventionally, in a building having an inclined roof, it is known that a ventilation structure is provided on the back of the roof for the purpose of effectively preventing moisture accumulated in the back of the roof.
For example, in Patent Document 1, a ventilation frame having a ventilation hole is disposed in a roof ridge of a roof in which a roofing sheet is laid on a base plate, and the roof ridge including the ventilation frame is covered with a waterproof sheet, and further on the waterproof sheet. The structure which mounts a wing member is disclosed. An opening is formed in the waterproof sheet at a position away from the ventilation hole of the ventilation frame, and a ventilation passage is established from the ventilation hole to the outside of the building building through the opening.

  The roof structure shows a technique for preventing rainwater and the like from being blown into the attic space through the ventilation passage by shifting the planar positions of the opening forming the ventilation passage and the ventilation hole. In this type of roof structure, a ventilation layer is formed on the back side of the field board forming the roof surface for the purpose of preventing the occurrence of condensation in the attic space, and the ventilation layer communicates with the ventilation passage. However, in the areas where the roof height is legally determined by slanting restrictions, etc. due to the provision of the ventilation layer, this is because of the roof structure. However, there is a problem that the degree of freedom of design is significantly limited.

Therefore, as shown in Patent Document 2, by forming an inclined roof with a roof panel in which an airtight heat insulating material is adhered to the back surface of the field plate, there is no ventilation layer between the field plate and the ventilation layer. It is conceivable to employ the ventilation structure of Patent Document 1 on the roof.
However, in the ventilation structure of Patent Document 1, an opening is formed in the ridge over the roof girder direction, while the ventilation frame as described above is only provided intermittently in the roof girder direction. Therefore, only the roofing sheet is attached to the opening between the ventilation frames, and as a result, the water vapor cannot be discharged outdoors under the roofing sheet between the ventilation frames. There was a problem that condensation could occur between the frames. Moreover, since the attic space communicates with the external space through the opening, even if the majority of the attic space is covered with the heat insulating material closely attached to the field plate, such an attic space and There was a problem that the heat insulation performance deteriorated due to the communication with the external space.

Japanese Patent Application Laid-Open No. 10-219948 JP 2007-262850 A

  The present invention has been made in view of the above circumstances, and provides an inclined roof structure capable of reliably preventing the occurrence of condensation and ensuring heat insulation performance while eliminating the ventilation layer below the roof surface. The purpose is to do.

As a specific means for solving the above problems, the inclined roof structure according to the present invention is:
(1) A pair of inclined roofs formed by laying a roof panel formed by adhering a plate-like airtight heat insulating material to the entire back surface of the field board forming the roof surface, and the pair of inclined roofs A relay airtight heat insulator spanned between the airtight heat insulating materials, and a ridge space is formed between the ridge formed on the ridge side end of the pair of inclined roofs and the relay airtight heat insulating material. It is provided and the said ridge part is formed with the opening which leads to the said wing lower space .
According to this, the attic space formed by the pair of sloped roofs is covered with the airtight heat insulating layer in which airtightness and heat insulating properties are secured by the airtight heat insulating material and the relay airtight heat insulating material. There is almost no risk that water vapor will reach the back side of the base plate through this, and this makes it possible to remarkably suppress the occurrence of condensation in the cabin space.
Further, the water vapor rising into the attic space in this way is discharged to the exterior space of the building along with the indoor ventilation and processed, and is processed without entering the airtight heat insulating layer.
In addition, even when forming the above-mentioned heat-insulated airtight layer, for example, moisture from the outer wall member and other building materials that form the end face of the shed space, the diffusion rate is slow, but continues to diverge over a long period of time even after completion, It is conceivable that water vapor due to the moisture passes along the outside of the heat insulating airtight layer and rises along the base plate. In addition, depending on the construction accuracy, a slight gap may be formed between the airtight heat insulating material and the relay airtight heat insulating material, and water vapor from the room may escape to the outside of the airtight heat insulating material through the gap. It is done. The above configuration is a sub-optimal measure for preventing the occurrence of condensation in the roof structure even when these unintended water vapors escape to the outside of the airtight heat insulating material, and according to the configuration, The water vapor as described above rises between the heat insulating material and the base plate, reaches the space under the building, and is discharged from the opening to the outside .

(2) Further, in the said opening, wind moisture permeation layer of vapor-permeable to prevent blowing wind towards the building space below is covered state, the building unit, said opening said wind permeable Shimeso And a vent hole that communicates the opening with the external space is provided in one or both of the building accessory member and the building accessory member and the ridge portion. Preferably it is formed.

According to this, since the wind-proof moisture-permeable layer covered by the opening of the wing space has moisture permeability, water vapor that has reached the wing-under space passes through the opening, the wind-proof moisture-permeable layer from the wing space. It reaches the space above the wind-proof and moisture-permeable layer and surrounded by the building member. Thereafter, the water vapor is discharged to the outside through the vent of the building member, thereby preventing the occurrence of condensation due to the water vapor. In addition, since the wind-proof moisture-permeable layer can transmit water vapor and prevent water droplets from passing through, the rainwater through the vents of the building officer member is surrounded by the building building member during wind and rain. Even in the case of entering the building, entry into the wing space is also prevented.

  In addition, when water vapor that has passed through the wind-proof and moisture-permeable layer is condensed by contact with the back surface of the building member, and the water droplets adhere to the back surface of the building member, the water droplet may fall toward the opening. Although it is conceivable, the water droplets are also received by the waterproof and moisture-permeable layer, and then discharged from the building member through a vent or by a cross wind blown from the vent.

Further, the relay airtight heat insulating material is spanned between the pair of inclined roofs, and the heat insulating material at the end of each inclined roof ridge is positioned above the central airtight heat insulating material. preferable.

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(3) In addition, the windbreak permeable Shimeso, it is preferably formed into a sheet of ^{0.10m 2 sPa / μg~0.20m 2 sPa /} μg as main material.
Thereby, water vapor | steam can be discharged | emitted effectively through the opening to the outer side of the wing space. On the other hand, it is possible to reliably block water droplets (droplets) from entering the wing space.

( 4 ) Moreover, it is preferable that the said wind-proof moisture-permeable layer is colored white or silver in the surface which opposes the back surface of the said building accessory member.
According to the said structure, the radiation from a wing member can be reflected effectively. As a result, even if the wing member is rapidly cooled by the outside air in the winter season and the cold radiation from the wing member reaches the windproof moisture permeable layer, the cold radiation is reflected. For this reason, there is no possibility that the windproof moisture-permeable layer is rapidly cooled to below the dew point temperature by the cold radiation. As a result, there is no risk that water vapor that has reached the windproof and permeable layer will be condensed under the windproof and permeable layer due to contact with the windproof and permeable layer. Water vapor in the space under the building can be effectively discharged from the opening.

( 5 ) Moreover, it is preferable that the said airtight heat insulating material and the relay heat insulating material are formed with a phenol resin foam as a main material.
Thereby, an airtight heat insulating layer which is extremely excellent in both airtightness and heat insulating property can be formed.

  According to the inclined roof structure of the present invention, it is possible to reliably prevent the occurrence of condensation and to ensure the heat insulating performance while making the ventilation layer absent under the roof surface.

  Hereinafter, based on the drawings, an embodiment in which the inclined roof structure according to the present invention is adopted for a two-story detached house will be described in detail.

<First Embodiment>
FIGS. 1-5 shows the building provided with the inclined roof structure which concerns on 1st Embodiment of this invention, and as shown in FIG. 1, the structure 1 and the structural frame 2 assembled | assembled on this foundation 1, An outer wall 3 supported by the structural housing 2, a heat insulating layer 4 provided along the outer wall 3 and the structural housing 2, an inclined roof structure 5, and a hut space A on the second floor above the ground. It is an assembly house.

The foundation 1 is formed as a cloth foundation made of reinforced concrete having the same cross section continuous in the length direction of the outer wall 3 and the partition wall.
The structural housing 2 includes a shaft assembly 6 that forms a first-floor and a second-floor housing, and a roof assembly 7 that is formed above the shaft assembly 6.
The frame structure 6 includes a steel column (not shown) erected on the foundation 1, a steel beam 8 spanned between the steel columns, and a floor slab 9 supported by the foundation 1 and the steel beam 8. It is a steel frame structure formed in preparation. Moreover, the steel frame brace structure formed by installing a seismic element (illustration omitted) between steel columns is also employable.
The steel column is formed by attaching a stigma member or a column base member to a steel square pipe or an end of the square pipe. The seismic element is formed by connecting a pair of square pipes with braces or a damping frame.
The steel beam 8 is formed of a so-called H-shaped steel formed by including a pair of upper and lower flanges and a web that connects between the center portions of the upper and lower pair of flanges. It is connected and supported by the pillar.
The connection between the steel column, the joint piece, and the steel beam 8 is made by mechanical means such as high-strength bolt joining, and as a result, the weld joint quality is eliminated regardless of the skill of the operator. Is constant.

The hut assembly structure 7 is assembled in a gable shape, a steel frame member provided at the top of the shaft assembly structure 6 or a bundle member erected on the floor slab 9 via a joint member, and the bundle member in the direction of travel And a rafter member 11 connected in the beam direction of the bundle member and held on the skew. Moreover, what is provided in the position which forms the ridge of a roof among the horizontal members 10 is called the purlin member 10a.
The bundle member and the rafter member 11 are formed as long steel members having a U-shaped cross section. Moreover, the horizontal member 10 is formed of I-shaped steel or H-shaped steel formed by connecting a pair of upper and lower flanges with a web in the same manner as the steel beam 8.
A metal piece such as a predetermined joint piece is also interposed between the bundle member, the rafter member 11 and the horizontal member 10, and the connection therebetween is also made by mechanical means such as high-strength bolt joining. .

The floor slab 9 is formed by laying a plurality of flat paneled lightweight lightweight concrete (ALC (Autoclaved Lightweight aerated Concrete)) floor panels.
The outer wall 3 is formed by arranging a plurality of flat-walled lightweight aerated concrete (ALC) outer wall panels side by side.
Each outer wall panel has a height corresponding to at least the height of each floor from the lower surface of the floor slab 9 of the floor to the upper surface of the upper flange of the steel beam 8. In addition, the upper and lower ends of the outer wall panels of each floor are supported by the steel beam 8 and the foundation 1 through appropriate support metal fittings such as a self-weight bracket and a Inazuma plate, which are attached in a state protruding from the steel beam 8 toward the outer wall panel. Has been.
As described above, the floor slab 9 and the outer wall 3 formed of lightweight cellular concrete are lightweight and have high heat insulation performance and fire resistance performance.

The inclined roof structure 5 according to this embodiment is supported by the roof structure 7 and covers the roof structure 7, and includes a wife outer wall 12 that closes a pair of wife surfaces, and a field that forms a roof surface. It has a pair of inclined roofs 15 formed by bringing a plate-like airtight heat insulating material 14 into close contact with the back surface of the base plate 13.
As shown in FIG. 2, the wife outer wall 12 is formed by arranging and arranging outer wall panels made of lightweight cellular concrete whose upper ends are cut obliquely in accordance with the inclination of the roof, on the inner surface of each outer wall panel. A flat airtight heat insulating material 16 is provided along the plate.
The wife outer wall 12 is not provided with a ventilation port or the like for ventilating the cabin space A formed by the wife outer wall 12 and the inclined roof 15.

As shown in FIG. 3, each inclined roof 15 includes the airtight heat insulating material 14 in addition to the field plate 13 forming the roof surface and the airtight heat insulating material 14 attached to the back surface of the field plate 13. It is formed by laying a roof panel 18 having a frame 17 provided on the lower surface.
Moreover, as shown in FIG. 4, the field board 13 of the roof panel 18 is formed in flat form with the fire-resistant field board or structural plywood which has fire resistance. The base plate 13 has the same planar shape and plane dimensions as the airtight heat insulating material 14, and when the base plate 13 is disposed on the upper surface of the heat insulating material 14 covering the frame body 17, the entire surface of the heat insulating material 14. Is covered with the field board 13.
The frame body 17 is formed by connecting steel frame members 19 having a U-shaped cross section in a square frame shape.
Further, the frame body 17, the airtight heat insulating material 14, and the small edge surfaces of the field plate 13 are aligned so as to be coplanar with each other, and in this state, the fixing tool 20 such as a tapping screw is attached from the surface side of the field plate 13. By fastening, the roof panel 18 which united the three is formed. Moreover, the airtight heat insulating material 14 is thereby provided between the field plate 13 and the frame body 17 while being sandwiched between the field plate 13 and the frame body 17.
The frame body 17 is filled with an airtight heat insulating material 21. The airtight heat insulating material 21 is formed in a plate shape and is filled in the frame body 17 in a state in which the four circumferences are fitted to the frame member 19. One surface of the airtight heat insulating material 21 is airtight on the back surface of the above-described base plate 13. The heat insulating material 14 is in close contact. The airtight heat insulating material 21 filled in the frame body 17 is formed of the same material as the airtight heat insulating material 14, but other materials can be used as long as a predetermined airtight performance and heat insulating performance can be secured. It is also possible to adopt.

  Further, in the roof panel 18 configured as described above, the airtight heat insulating material 14 is interposed between the frame body 17 and the field board 13, and the frame body 17 is positioned directly below the field board 13. is not. For this reason, although the frame body 17 is made of steel, there is no possibility that the frame body 17 forms a thermal bridge, and it is possible to exhibit good heat insulation. Moreover, since it is the structure which does not provide a ventilation layer between the field board 13 and the heat insulating material 14, it is possible to make the thickness of a roof thinner than before, and the roof height which is prescribed | regulated by a frame structure by extension. Can be kept low, and the degree of freedom in design increases.

  In the above, the airtight heat insulating materials 14, 16 and 21 provided in the roof panel 18 and along the outer wall 12 are not particularly limited in material and the like, and are plate-like hard foams having airtightness and heat insulating properties. Any heat insulating material can be used. As such a foam insulation board, there are hard plastic foam insulation materials including molded bodies and foams such as rigid urethane foam, extruded foamed polystyrene or phenol resin foam, and any of them can be used. Moreover, you may use the same kind of heat insulating material about all said use places, and you may use a different kind of heat insulating material according to a use place.

Rigid urethane foam and extruded polystyrene have high hardness and can exhibit sufficient heat insulating performance as a heat insulating panel applied to a roof by selecting a thickness. However, rigid urethane foam has problems such as deterioration of heat insulation performance over time, deflagration in fire and generation of harmful gas, and foamed polystyrene is inferior in chemical resistance, so airtight treatment materials are limited. There is also a problem that it is easy to burn.
For this reason, as the airtight heat insulating materials 14 and 21 of the present invention, phenol foam heat insulating plates are used. As this phenol foam heat insulating material, there is a technology (neoma foam (registered trademark)) made of a phenol resin foam developed by the present applicant and already applied for international application (Japanese Patent Application No. 2000-558158).

Phenolic resin foam according to the above techniques, and the phenol resin base portion, density and a bubble portion formed from a large number of fine bubbles are phenol foam of ^{10kg / m 3 ~100kg / m 3} , the fine bubbles It contains hydrocarbons, has an average cell diameter in the range of 5 μm to 200 μm, and the cell walls of most of the fine cells are composed of a smooth phenol resin substrate surface.
Despite the fact that the foaming agent is a hydrocarbon, it has thermal conductivity comparable to that of conventional fluorocarbon foaming agents, and there is no change in thermal conductivity over time, and it excels in mechanical strength such as compressive strength. , The brittleness is improved.

The phenol resin foam has high heat insulating properties and airtightness, and has the property of maintaining these performances for a long time. The heat insulating property in the phenol resin foam can be ensured by keeping the bubble diameter as small as 5 μm to 200 μm, preferably as small as 10 μm to 150 μm and keeping the closed cell ratio as high as 80% or more. Moreover, the phenol resin foam has high combustion resistance, and when the flame acts, the surface is carbonized, so that no ignition occurs and no gas is generated.
For example, when the density of the phenol resin foam is set to 27 kg / m ³ , the thermal conductivity at 20 ° C. is 0.02 W / m · K, the compressive strength is 15 N / cm ² , and the thermal deformation temperature is 200 ° C. As for the performance of the phenol resin foam, three types of extruded polystyrene foam have thermal conductivity: 0.028 W / m · K, compressive strength: 20 N / cm ² , heat distortion temperature: 80 ° C., rigid urethane foam Two types have sufficiently high performance as compared with thermal conductivity: 0.024 W / m · K, compressive strength: 8 N / cm ² heat distortion temperature: 100 ° C.
For this reason, a heat insulating material made of a phenol resin foam can exhibit substantially the same heat insulating performance with a thickness of about 2/3 that of conventional extruded polystyrene or rigid urethane foam.

  Moreover, since a phenol resin foam is a comparatively brittle material, it is common to provide the protective layer which consists of a kraft paper or a nonwoven fabric at least on one side. In particular, the phenol resin foam laminate disclosed in Japanese Patent Application Laid-Open No. 11-198332, which has been developed and patented by the present applicant, has improved adhesive performance by improving the nonwoven fabric forming the protective layer. The strength of the phenolic resin foam is improved by this nonwoven fabric, and it is provided as a heat insulating material for building excellent in both strength and heat insulation.

As shown in FIGS. 3 to 4, the roof panel 18 having the above-described configuration is configured such that the frame body 17 is disposed on the indoor side by placing the field board 13 on the roof side, and faces the rafter member 11. The constituting frame member 19 is fixed to the rafter member 11 via a fastener such as a bolt.
In the rafter member 11, a plurality of roof panels 18 are continuously arranged from the ridge side to the ridge side, which is the beam direction of the roof, and a plurality of roof panels 18 are also arranged in the girder direction. Sealing material is filled between the frame bodies 17 of the roof panels 18 provided adjacent to each other, thereby filling a gap between the adjacent roof panels 18. In this way, the roof base is configured by fixing each roof panel 18 to the rafter member 11.

  Further, the roof panel 18 that is positioned at the top of each inclined roof 15 and forms the ridge portion of the roof structure 5 is fastened to the purlin member 10 a via the joint member 22. In addition, a ridge forming member 23 that is continuous with the ridge side end of the roof panel 18 is attached to the joint member 22. The ridge forming member 23 includes a flat plate base plate member 23a and a fixed hardware 23b protruding from the back surface of the base plate member 23a, and the slope of the base plate member 23a is made to coincide with the slope of the roof panel 18. In this state, the fixed hardware 23 b is fixed to the joint member 22. A ridge portion 24 is formed by the pair of ridge forming members 23. The length in the roof gradient direction of the base plate member 23a of the ridge forming member 23 is slightly shorter than the length from the ridge side end of the uppermost roof panel 18 to the axis X serving as the central axis of the purlin member 10a. Thus, an opening 25 is formed in the ridge portion 24 between the pair of ridge forming members 23.

  The roofing sheet 26 is constructed over the top surface of the field board 13 of the roof panel 18 and the field board member 23a of the ridge forming member 23 fixed to the rafter member 11 forming the roof structure 7 as described above. The inclined roof 15 is formed by laying the roof material 27 on the upper surface of the sheet 26.

Moreover, the relay airtight heat insulating material 28 is spanned between the airtight heat insulating materials 14 and 21 of a pair of roof panels 18 located in the uppermost position. The relay airtight heat insulating material 28 is formed in a plate shape by a phenol resin foam like the airtight heat insulating materials 14 and 21 of the roof panel 18 and forms one inclined roof 15 below the purlin member 10a. The airtight heat insulating materials 14 and 21 of the roof panel 18 are closely attached to the airtight heat insulating materials 14 and 21 of the roof panel 18 forming the other inclined roof 15.
Further, the relay airtight heat insulating material 28 is provided with a groove in a position facing the rafter member 11, thereby avoiding interference with the rafter member 11, so that the airtight heat insulating materials 14, 21 of the roof panel 18 are provided. It is in close contact. Further, an airtight tape is attached to the joint between the relay airtight heat insulating material 28 and the airtight heat insulating materials 14 and 21 of the roof panel 18 and the frame body 17 from below the relay airtight heat insulating material 28.

By providing the relay airtight heat insulating material 28 as described above, the heat insulating airtight layer 16 is formed by the airtight heat insulating material 16 of the outer wall 12, the airtight heat insulating materials 14 and 21 of the roof panel 18 forming the inclined roof 15, and the relay airtight heat insulating material 28. (Adiabatic and airtight line) is formed, and thereby, the cabin space A is covered with these insulating and airtight layers. On the other hand, a ridge space B where the purlin member 10a exists is formed above the relay airtight insulation 28, and the opening 25 communicates with the ridge space B.
The opening 25 is covered with a wind-proof and moisture-permeable layer 29 from above a plurality of roof materials 27 covering a roofing sheet 26 provided on the base plate 13 of the pair of roof panels 18 forming the ridge portion 24. Yes. In addition, the ridge portion 24 is provided with a ridge member 31 that has a vent 30 at a position facing the inclined roof 15 and covers the opening 25 together with the wind-proof and moisture-permeable layer 29.

Windproof permeable Shimeso 29 is formed into a sheet material for the moisture permeation resistance and ^{0.10m 2 sPa / μg~0.20m 2 sPa /} μg as main material. The wind-proof and moisture-permeable layer 29 formed using such a material as a main material is a nonwoven fabric in which ultrafine fibers of polyethylene of 0.5 μm to 1.0 μm are randomly laminated and bonded under high temperature and high pressure, and allows water vapor to pass therethrough. On the other hand, the transmission of water droplets is blocked. In this embodiment, Tyvek (registered trademark, trademark right holder: EI Dupont Dou Nemour and Company) manufactured by Asahi DuPont Flashspun Products Co., Ltd. is used as the windproof and breathable layer. Examples of the material that satisfies the above characteristics include Gore-Tex (registered trademark) membrane or fabric manufactured by Japan Gore-Tex. The Gore-Tex membrane is a porous layer film obtained by special stretching of polytetrafluoroethylene (PTFE), and a composite film made of a special polymer on the other side. The porous layer has about 1.4 billion fine holes per square centimeter, and the size of one hole (about 0.2 microns) is about 1 / 20,000 of a water drop and about 700 times that of water vapor molecules. is there. Therefore, it has the characteristic that water vapor permeates without passing through water droplets. GORE-TEX fabric is a material in which a fabric such as nylon or polyester is laminated to a GORE-TEX membrane.
Further, the upper surface of the windproof and moisture permeable layer 29 is colored silver by depositing aluminum.

  The building accessory member 31 includes an accessory body 32 that is formed into a long shape in the girder direction by pressing a metal plate, and a fastening member 33 for fastening the accessory body 32 to the roof. I have. The accessory body 32 includes a pair of inclined portions 32a that are parallel to the roof surface of each inclined roof 15, and a fore edge portion 32b that is provided at the tip of each inclined portion 32a and bends toward the roof surface. . The fastening member 33 connects the lower pair of upper and lower body connecting portions 33a and 33b connected to the inclined portion 32a of the accessory body 32 and the lower end portions of the pair of body connecting portions 33a and 33b. A roof connecting portion 33c extending in a direction away from the main body connecting portion 33b. Each main body connecting portion 33a, 33b is fastened to the accessory main body 32 via a fastener such as a bolt, and the roof connecting portion 33c is fastened to the roof material 27 and the ridge forming member 23 via a fastener such as a bolt. Thus, the building accessory member 31 is provided at the uppermost position of the roof in a state where the building portion 24 is covered.

In addition, the pair of upper and lower body connecting portions 33a and 33b of the fastening member 33 of the building member 31 are provided with the above-described vent holes 30a and 30b (30), respectively, with a predetermined interval in the direction of travel. Yes. The vent holes 30a, 30b of the main body connecting portions 33a, 33b are provided slightly shifted from each other in the height direction of the main body connecting portions 33a, 33b, and the vent holes 30a of the upper main body connecting portion 33a are The lower main body connection portion 33b faces the wall surface of the lower main body connection portion 33b, and the vent hole 30b of the lower main body connection portion 33b faces the wall surface of the protruding wall formed in the upper main body connection portion 33a. This prevents the blowing of wind and rain through the vents 30a and 30b.
In addition, the building is provided with a system such as a 24-hour ventilation system that promotes ventilation at about 0.3 times / h to 1.0 times / h throughout the building. The ventilation system is in principle required to be installed by law, but in the implementation of the present invention, the ventilation system of the above level is given to the building by the installation of the ventilation system. The ventilation amount of the above-mentioned degree may be secured by opening / closing the provided opening / closing window or by opening the opening / closing window appropriately.

  The configuration of the present embodiment is as described above. According to the present embodiment, the roof space A is formed of the airtight heat insulating materials 14 and 21 of the roof panel 18 and the airtight heat insulating material 28. Therefore, there is almost no possibility that water vapor rising into the attic space A will pass through the hermetic heat insulating layer and reach the back surface of the field board 16, and therefore, condensation will occur in the attic space A. Can be reliably suppressed. Further, since the water vapor rising to the attic space A is discharged to the external space of the building by ventilation of a room located below the attic space A, it does not enter the hermetic heat insulating layer. Moreover, since the airtight heat insulating materials 14 and 21 and the relay airtight heat insulating material 28 are formed using a phenol resin foam as a main material, an airtight heat insulating layer that is extremely excellent in both airtightness and heat insulating properties is formed. Can do.

Also, moisture from the wife outer wall 12 and other building materials in the attic space A is slow to dissipate for a long time after completion, but the water vapor passes through the outside of the heat-insulating airtight layer along the field plate 13. Depending on the construction accuracy, a slight gap is formed between the airtight heat insulating materials 14, 21 and the relay airtight heat insulating material 28, and the water vapor from the living room passes through the gap. It is conceivable that the materials 14 and 21 come out of the outside.
However, in this embodiment, even when these unintended water vapors escape to the outside of the airtight heat insulating materials 14 and 21 and reach the under-building space B, the openings 25 in the under-building space B are covered. Since the wind-proof and moisture-permeable layer 29 has moisture permeability, the water vapor is located above the wind- and moisture-permeable layer 29 through the opening 25 and the wind-proof and moisture-permeable layer 29 from the under-building space B, and the building member 31 It reaches the space surrounded by and is discharged to the outside through the vent 30 of the building accessory member 31, and the occurrence of condensation due to the water vapor can also be prevented. Further, since the wind-proof and moisture-permeable layer 29 allows water vapor to pass therethrough and prevents water droplets from passing therethrough, rainwater is surrounded by the building accessory member 31 through the vent 30 of the building accessory member 31. Even in the event of wind and rain that can invade, the intrusion of rainwater into the wing space B is reliably prevented.

  Further, when water vapor that has passed through the wind-proof and moisture-permeable layer 29 comes into contact with the back surface of the building member 31 and water droplets adhere to the back surface of the building member 31, the water droplet falls toward the opening 25. However, the water droplets are also received by the waterproof and moisture permeable layer 29, and then discharged from the building member 31 through the vent 30 or by a cross wind blown from the vent 30.

  Moreover, since the wind-resistant moisture-permeable layer 29 is colored in white or silver on the surface facing the back surface of the wing member 31, the radiation from the wing member 31 can be effectively reflected. As a result, even if the building accessory member 31 is rapidly cooled by the outside air in the winter season and the cold radiation from the building accessory member 31 reaches the windproof moisture permeable layer 29, the cold radiation is reflected. . For this reason, there is no possibility that the windproof moisture permeable layer 29 is cooled so rapidly that it falls below the dew point temperature by the cold radiation. As a result, there is no risk that the water vapor that has reached the windproof / breathable layer 29 will contact the windproof / breathable layer 29 to cause condensation under the windproof / breathable layer 29, and the temperature difference between indoors and outdoors such as in winter is significant. Moreover, the water vapor | steam of the substructure space B can be discharged | emitted effectively from the opening 25. FIG.

Second Embodiment
6 to 7 show an inclined roof structure according to the second embodiment of the present invention. In the present embodiment, except for a configuration in which a single-flow roof structure is formed by an outer wall and an inclined roof, the configuration is the same as that of the first embodiment. Therefore, only the configuration will be described below, and other configurations will be described. Are denoted by the same reference numerals as in the first embodiment, and description thereof is omitted.

As shown in FIG. 6, the inclined roof structure 5 of the present embodiment includes an inclined roof 15 formed by bringing a plate-like airtight heat insulating material 14 into close contact with a back surface of a field board 13 forming a roof surface, and an outer wall surface. An upright outer wall 40 is formed by forming a plate-like airtight heat insulating material 41 along the back surface of the outer wall member to be formed.
The outer wall 40 is formed by arranging outer wall panels, and is erected along the bundle member of the roof structure 7 and the purlin member 10a. The outer wall 40 protrudes from the purlin member 10a and the base plate 13 of the inclined roof 15 and It is extended to the same height. Moreover, each outer wall member is supported by the purlin member 10a etc. via the attachment hardware.
Accordingly, an opening 25 is formed between the upper end portion of the outer wall 40 that forms the ridge portion 24 of the single-flow inclined roof structure 5 and the ridge forming member 23 that forms the inclined roof 15.
An airtight heat insulating material 41 is provided along the outer wall 40. The airtight heat insulating material 41 is formed in a plate shape, and its upper end is in contact with the lower flange of the purlin member 10a.

As shown in FIG. 7, a relay airtight heat insulating material 42 is bridged between the airtight heat insulating members 14 and 21 of the roof panel 18 forming the inclined roof 15 and the airtight heat insulating member 41 of the outer wall 40.
The relay airtight heat insulating material 42 is provided so as to extend from the lower side of the lower flange of the purlin member 10a toward the inclined roof, and one end thereof is in close contact with the airtight heat insulating material 41 provided along the outer wall. In addition, the other end portion is provided in close contact with the airtight heat insulating materials 14 and 21 of the roof panel 18 forming the inclined roof 15. In addition, the seams between the relay airtight heat insulating material 42 and the airtight heat insulating materials 14 and 21 are each covered with an airtight tape.
By providing the relay airtight heat insulating material 42 as described above, the airtight heat insulating material 16 of the outer wall 12, the airtight heat insulating materials 14 and 21 of the roof panel 18 of the inclined roof 15, the airtight heat insulating material 41 of the outer wall 40 and the relay airtight. A heat insulating airtight layer (heat insulating airtight line) is formed by the heat insulating material 42, and thus the cabin space A is covered with these heat insulating airtight layers. On the other hand, a ridge space B where the purlin member 10a exists is formed above the relay airtight heat insulating material 42, and the opening 25 communicates with the ridge space B.

The opening 25 is covered with a wind-proof and moisture-permeable layer 43 provided over the ridge forming member 23 and over the upper end of the outer wall 40. In addition, the ridge portion 24 formed by the ridge forming member 23 and the upper end portion of the outer wall 40 is provided with a ridge member 44 that covers the wind-proof and moisture-permeable layer 43 together with the opening 25.
The building accessory member 44 includes an accessory main body 45 formed in a long shape in the direction of girder by pressing a metal plate or the like, and a fastening member 46 for fastening the accessory main body 45 to the roof. I have. The accessory body 45 includes a roof-side inclined portion 45a that is parallel to the roof surface of the inclined roof 15, an outer-wall-side inclined portion 45b that covers the upper end portion of the outer wall 40, the outer-wall-side inclined portion 45b, and the roof-side inclined portion 45a. And a connecting inclined portion 45c for connecting the two. Both the outer wall side inclined portion 45b and the connecting inclined portion 45c are inclined downwardly to the roof side inclined portion 45a. Further, a front end portion of the roof side inclined portion 45a is provided with a fore edge portion 45d that is bent toward the roof surface.

In addition, the fastening member 46 is connected to the upper and lower pair of main body connecting portions 46a and 46b connected to the roof-side inclined portion 45a of the accessory main body 45 and the lower ends of the pair of main body connecting portions 46a and 46b. And a roof connecting portion 46c extending in a direction away from the main body connecting portion 46b on the side. The main body connecting portions 46a and 46b are fastened to the accessory main body 45 via fasteners such as bolts, and the roof connecting portion 46c is fastened to the roof material 27 and the ridge forming member 23 via fasteners such as bolts. As a result, the building accessory member 44 is provided in a state of covering the building portion 24.
In addition, vent holes 47a and 47b are formed in the pair of upper and lower body connecting portions 46a and 46b of the fastening member 46 of the building accessory member 44, respectively, with a predetermined interval in the direction of the digits. The vent holes 47a and 47b of the main body connecting portions 46a and 46b are provided slightly shifted from each other in the height direction of the main body connecting portions 46a and 46b, and the vent holes 47a of the upper main body connecting portion 46a are The lower main body connecting portion 46b faces the wall surface, and the lower main body connecting portion 46b vent 47b faces the protruding wall surface of the upper main body connecting portion 46a. This prevents blowing of wind and rain through the vent holes 47a and 47b.

  Further, the outer wall side inclined portion 45 b of the accessory main body 45 is covered with a restroom member 49. The makeup building member 49 has a slope similar to that of the roof-side slope 45a of the accessory body and covers the roof slope, and is provided along the end of the first slope 49a. And a second inclined portion 49b formed in a downward gradient from the upper side of the outer wall 40 toward the surface side, whereby rainwater poured on the upper end portion of the outer wall 40 is quickly inclined on the inclined roof side or outer wall surface side. To be drained.

  The structure of this embodiment consists of the above, Comprising: In this embodiment, there exists an effect similar to the case of 1st Embodiment. For example, the shed space A is covered with an airtight heat insulating layer formed by the airtight heat insulating materials 14 and 21 of the inclined roof 15, the relay airtight heat insulating material 42, and the airtight heat insulating material 41 along the outer wall 40. The water vapor rising into the space A does not reach the base plate 13 and the windproof / breathable layer 43 is provided in the opening 25 in the space B under the building. On the other hand, even if rainwater passes through the wing member 49, it does not enter the wing space B.

As mentioned above, although embodiment of this invention was explained in full detail, the structure of this invention is not limited to the said embodiment, The structure other than the said embodiment is also employable.
For example, the roof panel 18 has one or more vacuum heat insulating plates covered with a sheet formed by depositing a metal film on a non-woven fabric made of polyethylene, and both surfaces of the vacuum heat insulating plate that are arranged. It is also possible to adopt a configuration in which a laminate formed by disposing a hard foam heat insulating plate on each frame is filled between the frames, and further, when connecting the end of the laminate to the frame, the laminate It is also possible to adopt a configuration in which a gap is provided between the end of the vacuum heat insulating plate constituting the frame and the frame constituting the frame.
Further, when the roof material 27 is formed of a slate tile or the like having surface irregularities, the ridge portion 24 and the ridge portion of the inclined roof 15 provided with the roof material when the ridge member 31 is placed on the roof material 47. Since a gap is inevitably formed between the object member 31, it is possible to employ a configuration in which the gap is used as the vent 30 and the vent member 31 is not provided with a vent. . Of course, even if it is the said structure, the structure which provides the vent 30 in the wing member 31 is also employable.

It is a sectional side view of the building which provided the inclined roof structure which concerns on 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the roof structure part of the building of FIG. It is a sectional side view which expands and shows the inclined roof structure part of FIG. It is sectional drawing of the roof panel used for the inclined roof structure of FIG. It is a sectional side view which expands and shows the ridge part of an inclined roof structure part. It is a sectional side view of the building which provided the inclined roof structure which concerns on 2nd Embodiment of this invention. It is side sectional drawing which expands and shows an inclined roof structure part.

DESCRIPTION OF SYMBOLS 1 Foundation 2 Structure frame 3 Outer wall 4 Heat insulation layer 5 Inclined roof structure 6 Shaft structure 7 Hut structure 8 Steel beam 9 Floor slab 10 Horizontal member 10a Purlin member 11 Rafter member 12 Wife outer wall 13 Base plate 14 Airtight insulation ( Back of the field plate)
15 Inclined roof 16 Airtight heat insulating material (coastal outer wall)
17 Frame 18 Roof panel 19 Frame member 20 Fixture 21 Airtight heat insulating material (inside frame)
22 joint member 23 ridge forming member 23a field plate member 23b fixed hardware 24 ridge portion 25 opening 26 roofing sheet 27 roofing material 28 relay airtight heat insulating material 29 windproof moisture permeable layer 30 vent 31 wing accessory member 32 accessory main body 32a inclined portion 32b Small mouth part 33 Fastening member 33a Main body connection part 33b Support part 33c Roof connection part 40 Outer wall 41 Airtight heat insulating material 42 Relay airtight heat insulating material 43 Windproof moisture-permeable layer 44 Building accessory member 45 Property main body 45a Roof side inclined part 45b Outer wall side inclined portion 45c Connecting inclined portion 45d Small opening portion 46 Fastening member 46a Main body connecting portion 46b Supporting portion 46c Roof connecting portion 47 Ventilation port 48 Water performance member 49 Vanity member 49a First inclined portion 49b Second inclined portion A Space B Building space X Axis

Claims (7)

A pair of sloped roofs formed by laying a roof panel formed by adhering a plate-like airtight heat insulating material to the entire back surface of the base plate forming the roof surface, and airtight insulation of these pair of sloped roofs With relay airtight insulation material spanned between the materials,
A ridge space is provided between the ridge formed on the ridge side end of the pair of inclined roofs and the relay airtight heat insulating material, and an opening leading to the ridge space is formed in the ridge. An inclined roof structure characterized in that it is made . The opening is covered with a moisture-permeable wind-permeable breathable layer that prevents the blowing of wind toward the space under the ridge, and the ridge portion covers the opening together with the wind-proof and moisture-permeable layer. A member is provided, and a vent for communicating the opening and the external space is formed in one or both of the building member and the building member and the building part. The inclined roof structure according to claim 1, wherein: The relay airtight heat insulating material is bridged between the pair of inclined roofs, and the heat insulating material at the end of each inclined roof ridge is located above the central airtight heat insulating material.
The inclined roof structure according to claim 1 or 2, characterized by the above . The end of the pair of sloped roof surfaces on the wife side is covered with an outer wall panel made of lightweight cellular concrete with the upper end cut obliquely in accordance with the sloped roof.
The inclined roof structure according to any one of claims 1 to 3, wherein the inclined roof structure is provided .   5. The windproof moisture permeable layer is formed in a sheet shape using a material having moisture permeability resistance of 0.10 m 2 sPa / μg to 0.20 m 2 sPa / μg as a main material. The sloped roof structure described in crab.   5. The inclined roof structure according to claim 2, wherein the wind-proof and moisture-permeable layer is colored white or silver on a surface facing the back surface of the building member.   The inclined roof structure according to any one of claims 1 to 6, wherein the airtight heat insulating material and the relay airtight heat insulating material are formed using a phenol resin foam as a main material.

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