JP4743907B2 - Breathable heat insulating roof composite panel and wooden exterior heat insulating roof structure using the panel - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a breathable roof panel for constructing a roof of a wooden building into an outer heat insulating structure, and a wooden outer heat insulating roof structure constructed with the roof panel, and belongs to the technical field of wooden house construction. It is.

In order to make an energy-saving house even in a wooden building, a construction method for covering a roof with a breathable outer heat insulating coating has already been proposed, for example, as described in the conventional examples 1, 2, and 3.
FIG. 8 (A) is a conventional example 1 and is cited as Patent Document 1. Between the roof rafters, heat insulation and heat insulation for reducing heat addition to the heat insulation by radiant heat reflection action. The material is placed on top of each other.

That is, as shown in FIG. 8A, the conventional example 1 has a panel receiving material attached to the lower side of the roof rafter, and an upper surface sheet, an intermediate sheet, a lower surface on the heat insulating material supported by the panel receiving material between the roof rafters. Place the heat shielding material that integrates the sheet while maintaining the air space, and that has a radiant heat reflection effect, bend the protruding side edge of the top sheet of the heat shielding material along the rafter side, An air layer is also formed between the upper surface of the rafters and a windproof sheet and a roof covering material are fixed to the upper surface of the rafters.
And since the heat from the roof surface is released by the air flowing through the air layer with the heat shield reflecting the radiant heat, and the heat addition to the heat insulator is suppressed by removing the radiant heat from the heat shield, It can be made thinner than other roof insulation materials, and heat storage of the insulation materials can be reduced.

  Further, Conventional Example 2 shown in FIG. 8 (B) is a ventilated roof panel disclosed in Patent Document 2, which includes a rafter as a vertical member and a cross member as shown in FIG. 8 (B). A lattice frame is formed with a joint material provided with a ventilation hole as the above, and the lattice frame is filled with a heat insulating material, and a large number of protrusions are protruded at intervals on the heat insulating material on the upper surface of the heat insulating material. A roof panel on which a sheet plate is placed and a base plate is fixed to the upper surface of the lattice frame, and air is allowed to flow through the gaps between the projections in contact with the lower surface of the field plate and the vent of the joint material. Is.

Further, Conventional Example 3 shown in FIG. 8C is a field panel for supporting a roof tile disclosed in Patent Document 3, in which a heat insulating material is disposed on a lower side surface material, and an upper surface of the heat insulating material. The upper side material is disposed while holding the ventilation space, and the lower side material and the upper side material are integrated with both side edges and the central rafter.
JP 2003-171996 A JP-A-8-291600 Japanese Patent Laid-Open No. 5-230953

  The ventilated roof structure of Conventional Example 1 shown in FIG. 8 (A) covers the upper surface of the heat insulating material with a heat shielding material having a radiant heat reflection function, so that the heating load and heat storage on the heat insulating material can be reduced, and the heat insulating material is also used. It has the advantage that it can be made thinner than the conventional roof insulation material, but since the windbreak layer and the roof covering material (field plate) are directly in contact with the upper surface of the roof rafter, the roof surface and the hut Between the back and the roof finishing material → windproof layer → field plate → rafter route thermal bridge, the heat insulation function of the roof structure is reduced.

In addition, installation work of panel receivers on rafters, support work of heat insulation material between rafters, placement work of heat insulation material on the top surface of heat insulation material, windproof sheet and roof base with an air layer on the top surface of heat insulation material There are many fixing work of materials, the use member and construction man-hours.
And since the heat shield is a honeycomb structure that is easily displaced, consisting of a lower sheet, an intermediate sheet, and an upper sheet, it is necessary to be careful to place it between rafters so as to achieve the desired radiant heat reflection effect. Therefore, the construction of a breathable roof is a cumbersome operation requiring manpower.

  The ventilation roof construction method of Conventional Example 2 shown in FIG. 8B employs a ventilation roof panel incorporating rafters, so that the construction of the roof at the construction site can be streamlined with fewer man-hours. The production itself is a lattice frame made of rafters and joints cut out in advance, filling the lattice frame with heat insulating material, and placing the insulation sheet on the top surface of the heat insulating material with projections formed by embossing In addition, there are many man-hours for manufacturing the panel itself by covering and fixing the base plate to the rafters, and the manufacture of the ventilation roof panel itself is complicated.

In addition, the cutout arrangement of the ventilation holes in the joint material is not possible in the number of arrangements in the width direction so much that the parts other than the ventilation holes obstruct the air flow, and the protrusions of the heat insulating sheet have a smooth flow of air. As a result, it is not possible to expect a smooth flow of air through the panel of the ventilated roof panel.
In addition, since the field board of the roof panel is in direct contact with the rafter, the field board and the rafter form a thermal bridge, and the heat insulation action of the roof panel itself is lower than the set value depending on the thickness of the heat insulating material.
In addition, a plastic insulation sheet is placed on the top surface of the insulation with the required thickness to form a ventilation structure. Heating from the heat insulating material to the heat insulating material is inevitable, and water vapor release from the heat insulating layer side cannot be expected.
In addition, the panel thickness becomes large, the roof thickness becomes large, and the floor height becomes small under the height restriction of the building.

Moreover, since the field panel of the prior art example 3 shown in FIG. 8 (C) is a rafter integrated body like the prior art example 2, the roof construction at the construction site can be rationalized, but the lower side material is a ceiling board. It is limited to buildings where the roof is exposed from the room.
Further, since the ventilation space is formed on the upper surface of the heat insulating material having a required thickness, the panel thickness is increased as in the case of the conventional example 2.
Moreover, since the upper and lower side materials are integrated via a rafter, the upper and lower side materials have a thermal bridge structure, and the thermal insulation is thermally protected from the hot air vent space in summer. Combined with not being done, the heat insulation effect of the field panel (roof panel) itself is lower than the set value in the heat insulating material.

  The present invention solves or improves the problems of construction, panel production, and function of the ventilated and insulated roofs of the conventional examples 1 to 3 at a stroke, is easy to manufacture, Excellent in workability, functionally, providing a new thermal insulation and breathable roof composite panel that exhibits the heat insulation function of the set value in the heat insulation layer in winter and summer, and can be prepared as a homogeneous product. It provides a technology that can rationally construct a ventilation insulation roof of a wooden building with an insulation function.

  The roof composite panel of the present invention is, for example, as shown in FIG. 1, a roof composite panel 1 in which a heat insulating layer 2B and a roof base material 2A are layered and integrated through a heat-shielding reflective layer. The laminating surface 2S is provided with ventilation grooves G and thick portions 2T alternately and in parallel, and the vertical rails 2W and 2W having the same thickness as the heat insulating layer 2B are provided at the width center and both side edges. ′, And the heat insulation layer 2B of the heat insulation layer 2B including the vertical bars 2W and 2W ′ is provided with a heat shield reflection layer 2C having both surfaces of the heat shield reflection function, and on the upper surface of the heat shield reflection layer 2C, The roof base material 2A covering the entire width of the panel is integrated with the surface contact in a form in which the ventilation layer G ′ is secured via the ventilation trunk edges 2D and 2D ′.

In this case, the heat insulating layer 2B is a plate-like heat insulating plate having a shape retaining property that can be integrally layered with the heat shielding reflective layer 2C on the roof base material 2A, and the heat insulating standard (1 The heat resistance value in a wooden airtight house in Hokkaido in the district should be 4.3 m ² k / w), and polystyrene foam, rigid urethane foam, and other foamed plastic insulation of JISA9511 is good. And an extruded polystyrene foam having a thickness T5 of 135 mm (thermal conductivity: 0.024 kcal / mh ° C. or less).

Further, the groove group G for ventilation may be cut and arranged with a cutter to a depth that guarantees a minimum upward flow of the air flow a and minimizes a heat insulation defect. G has a depth Gd of 15 mm, a width a1 of 45.5 mm, and is equal to the width a1 of the thick portion 2T.
In this case, if the arrangement area of the groove G group is ½ with respect to the total area of the heat insulating layer 2B, the heat insulation defect with respect to the layer thickness of the heat insulating layer 2B is 1/2 of the depth Gd of the groove G. It becomes a dimension.
Therefore, the arrangement area of the groove G having a depth that provides a predetermined ventilation function with respect to the heat insulating layer 2B having a predetermined reference thickness may be determined in consideration of a surface for suppressing heat insulation defects and a surface for air ventilation.

Further, the vertical rails 2W and 2W ′ may be wood that maintains the function as a rafter and is integrated with the same thickness as the heat insulating layer 2B.
Further, the roof base material 2A may be a thin and rigid plate having the minimum strength, impact resistance, and workability as a roof base plate of the roof R. Typically, the roof base material 2A is lightweight (10 kg / m ² ), It is a structural plywood (JASS standard product) with a high strength (240 kgf / cm ² ) and a thickness of 12 mm.
Further, the heat shield reflection layer 2C may be a heat shield reflection sheet whose front and back surfaces have a radiant heat reflection function and can be surface-contacted and stretched on the surface 2S of the heat insulating layer 2B.

Accordingly, in the roof composite panel 1 of the present invention, since the vertical beams 2W and 2W ′ have the rafter function, the roof construction to the roof structure is performed from the vertical beams 2W and 2W ′ from the upper surface to the main building 22B and the like. The heat insulation layer 2B of the roof panel 1 protects the interior from heat insulation, and in each of the ventilation grooves G on the surface of the heat insulation layer 2B, a heat insulation layer from the indoor side is provided. The heat-shielding reflective layer 2C that forms the ceiling surface of the groove G is reflected by the heat-shielding reflective layer 2C that discharges the transmitted water vapor (humidity) to the outside and is emitted from the heat-insulating layer 2B. Since part of the converted radiant heat is discharged from the groove G, and part of the heat is added to the heat insulating layer 2B again, the heat insulating layer 2B has heat loss even though the groove G group is notched. The water vapor discharge function is demonstrated with minimal control.
Moreover, the ventilation layer G ′ on the lower surface of the roof base material 2A reflects the transmitted heat from the roof surface on the surface of the heat shielding reflective layer 2C on the lower surface of the ventilation layer G ′, converts it to radiant heat on the surface of the roof base material 2A, and releases it. Therefore, the roof surface is cooled and the damage to the roof is suppressed.

That is, the roof composite panel 1 of the present invention has a heat insulating layer 2B having a predetermined reference necessary thickness even if the groove G having a required depth as a ventilation layer for discharging moisture from the heat insulating layer 2B is cut out. The heat insulation reflection layer 2C can compensate for the heat insulation defect caused by the notch of the groove G, and the ventilation layer G ′ on the upper surface of the radiant heat reflection layer 2C reduces the intrusion heat from the roof surface. Since it is emitted to the outside as radiant heat, it is possible to suitably achieve thermal protection in the winter and summer on the roof surface, and it becomes a roof panel of an energy saving house.
In addition, the roof panel is excellent in workability with a rafter integrally.

In addition, as shown in FIG. 1, the roof panel 1 of the present invention has the same width of the groove G, the width of the thick portion 2T, and the width of the vertical beam 2W at the center of the heat insulating layer 2B. The width of the vertical beam 2W ′ at the layer side edge is preferably ½ of the width of the vertical beam 2W at the center.
In this case, since the vertical bars 2W and 2W ′ are integrated with the heat insulating layer 2B, the roof composite panel 1 is fixed to the main building 22B from the roof base material 2A of the panel 1 at the vertical bars 2W and 2W ′. Can be firmly fixed by driving a long screw (not shown) into the purlin 22B, purlin 22A, and eaves girder 21E. It becomes the same width as the vertical beam 2W, and the roof surface has uniform strength.

  Accordingly, since the groove G for ventilation has a uniform width over the entire surface of the roof surface with the same width as the non-grooved portion, that is, the thick portion 2T, the heat insulation defect of the heat insulating layer 2B due to the arrangement of the grooves G. However, in calculation, it can be suppressed to a ½ deficit (standard: 7.5 mm) of the groove depth (standard: 15 mm), and the heat rays emitted from the heat insulating layer 2B into the groove G are reflected by the heat shielding reflective layer 2C. Since heat is exchanged on the surface of the heat insulating layer 2B by reflection at the surface, part of the converted heat is added again into the heat insulating layer 2B, so that compensation for heat insulation defects can be achieved conveniently, and heat insulation by ventilation of the grooves G group The moisture release function of the layer 2B is evenly distributed over the entire roof surface, and the uniform protection from overheating of the roof surface by the ventilation layer G 'and the outside heat insulation protection inside the house are provided over the entire roof surface of the panel 1 Can be achieved in a leveled state.

Further, in the roof composite panel 1 of the present invention, the heat shielding / reflecting layer 2C is formed of 2 of the core material 20 provided with the projections 20b group on the plastic resin sheet 20a as shown in FIGS. 4 (A) and 4 (B). It is preferable that the sheet is a heat-shielding reflection sheet 2C in which the protrusions 20b are opposed to each other and the aluminum foil 20c is layered on the front and back sheets 20a.
In this case, the heat-shielding reflection sheet 2C has a configuration in which the inner surface of each projection 20b group in which air is sealed is opposed to each other, and an air layer is interposed between the projections 20b group and between the projections 20b. It is possible to adopt Ramipack SD-W (trade name) manufactured by Sakai Chemical Industry Co., Ltd., which has aluminum foil layers on both front and back surfaces. The Ramipack SD-W (trade name) is lightweight (335 g / m ² ). High heat insulation, high strength (tensile strength 3.9 N / mm), preventing the intrusion of heat radiation, high radiant heat cut rate, excellent durability, and can be easily cut with a cutter or scissors.

  Accordingly, since the heat shielding reflective layer 2C has an air layer inside, the aluminum foils on the front and back surfaces exhibit a radiant heat reflecting action, and the radiation heat in the ventilation layer G ′ and the groove G is released to the outside and the shielding is performed. The heat reflecting layer 2C itself also exhibits a heat insulating function by the intervening air layer, and a groove G group having a depth Gd (standard: 15 mm) having a sufficient ventilation function is notched in the heat insulating layer 2B having a necessary thickness. Even if a heat insulation defect occurs due to a notch in the groove group G, the heat radiation from the heat insulating layer 2B into the groove G is reflected by the aluminum foil on the ceiling surface of the groove G and converted to heat on the heat insulating layer 2B surface. A part is released, and a part is again heat-added to the heat insulation layer 2B.

The heat insulation function of the heat shield reflective layer 2C itself also prevents the thermal bridge action between the roof base material 2A and the vertical rails 2W and 2W ′ of the heat insulation layer 2B, and the roof panel 1 has the heat insulation function as designed. Demonstrate.
Therefore, in the roof panel 1, the heat-shielding reflection layer 2C emits compensation for heat insulation defects due to the groove G group on the lower surface side, and releases intrusion heat from the roof surface as radiant heat on the upper surface side, and the roof base material 2A The side and the heat insulating layer 2B side are insulated by preventing the thermal bridge action to achieve suitable roof insulation in summer and winter.

In addition, the heat shield reflection sheet 2C preferably has a thickness T2 of 8 mm and a heat insulating effect corresponding to the thickness of 5 to 7 mm of the heat insulating layer 2B.
The thermal barrier reflective layer 2C having a plate thickness T2 of 8 mm has a thermal conductivity of 0.032 kcal / mh ° C. (0.038 w / mk), and therefore has a thermal resistance of 0.25 kcal / mh ° C. (0.21 w / mk). Yes, extruded polystyrene foam (thermal conductivity: 0.024 kcal / mh ° C.) has a heat insulation effect of 6 mm thickness, so the roof surface on the upper surfaces of the vertical bars 2W and 2W ′ and the upper surface of the thick part 2T of the panel 1 In the groove G (standard depth: 15 mm), the radiant heat is reflected and the conduction heat is cut off.

In this case, in the summer, the heat-shielding reflective layer 2C releases and removes radiant heat in the ventilation layer G 'that has been heated by solar heat, and suppresses heating addition to the heat-insulating layer 2B by its own heat-insulating function. In winter, the cooling of the heat insulating layer 2B is protected by the heat insulating function, and a part of the radiation reflection heat released from the heat insulating layer 2B into the groove G is reduced and added to the heat insulating layer 2B. Demonstrate.
Therefore, by properly selecting the arrangement area (standard: 1/2 of the total area) of the groove G group, it is possible to completely compensate the heat insulation defect of the heat insulation layer 2B, and from the outside of the summer with the necessary ventilation layer. This makes it possible to obtain a roof panel suitable for both heat insulation and indoor insulation in winter.

  Therefore, the heat shield reflective layer 2C exhibits a radiant heat reflection effect and a conduction heat shield effect on the top end surface (ceiling surface) of the groove G, and on the top surfaces of the vertical rails 2W and 2W ′ and the thick portion 2T, the heat insulation layer 2B. Conductive heat blocking effect equivalent to 5-7mm thickness, compensates for heat insulation defect due to notch of groove G group of heat insulation layer 2B, and roof composite panel 1 vents large amount of heat entering from roof surface in summer In the layer G ′, radiant heat is converted and eliminated, and the heat of conduction heat to the heat insulating layer 2B is thermally protected by its own heat insulating function. In winter, heat radiation from the upper surface of the heat insulating layer 2B is suppressed and from the roof surface. In order to thermally protect the cooling of the heat insulation layer 2B and to constantly release water vapor from the heat insulation layer 2B, it has a sufficient ventilation function and a sufficient outer heat insulation function in summer and winter. The roof panel has excellent weather resistance.

In the roof composite panel 1 of the present invention, the heat insulating layer 2B is an extruded polystyrene foam plate having a thickness T5 of 135 mm, the depth Gd of the groove G is 15 mm, and the entire groove G The area is preferably ½ of the panel area.
According to the current heat insulation standard (Hokkaido area) in the next-generation energy saving standard announced in 1999, the heat resistance value of wooden airtight houses is 4.3 m ² k / w, and the required thickness for extruded polystyrene foam board However, the heat insulating layer 2B of the present invention is 135 mm of an extruded polystyrene foam plate, and as shown in FIG. 1 (A), the total area of the equally distributed grooves G is 1 / of the panel area. Since the depth Gd of the groove G is 15 mm, the heat insulation defect of the heat insulating layer 2B is 1/2 (7.5 mm) of the depth G of 15 mm (Gd).

Therefore, the heat insulation defect of the heat insulation layer 2B in which the groove G having a depth of 15 mm is equally distributed is 7.5 mm thick, and the heat insulation thickness including the heat insulation defect from the heat insulation layer 2B of 135 mm thickness is 127.5 mm (135 mm− Therefore, the construction standard thickness (125 mm) is satisfied.
Therefore, the roof composite panel 1 of the present invention satisfies the heat insulation standard even if a conventional aluminum foil layered film having only a radiant heat reflection function is used as the heat shield reflection layer 2C, without any heat insulation function. The elimination of the intrusion heat from the roof surface in the ventilation layer G ′ is achieved, and a part of the radiant heat in the heat shield reflection layer 2C in the ventilation groove G group is eliminated, and a part of the heat insulation layer 2B Appropriately added to the air, it exhibits the necessary heat insulation function in winter and summer, and enables energy saving in air conditioning.

Further, in the roof composite panel 1 of the present invention, as shown in FIG. 1B, both side surfaces 1R and 1L of the panel 1 are flush with each other, and the ventilation trunk edge 2D 'of the one side edge 1R is on the side. It is preferable that the phase defect step d4 protrudes from the edge 1R, and the ventilation trunk edge 2D ′ of the other side edge 1L enters the phase defect step d4 from the side edge 1L.
In this case, the dimension of the phase gap step d4 of the ventilator edge 2D ′ is typically 10 mm.
Therefore, the left and right joints between the panels 1 are the work of lacking a fitting phase between the ventilating drum edge 2D 'protruding from the side edge to the entering drum edge 2D' of the side edge, and there is no gap between the panels. Joint connection work becomes easy.
In addition, at the left and right connection portions between the panels 1, as shown in FIG. 5B, the contact interface vf of the roof base material 2A and the contact interface vf of the vertical rail 2W ′ and the contact interface vf of the ventilation trunk edge 2D ′. Therefore, the left and right connecting portions between the panels 1 do not require an airtight process such as airtight tape sticking, and the workability of building the roof surface is improved.

In addition, the invention of the wooden exterior heat insulating roof structure of the present application is a wooden exterior heat insulating roof structure in which the roof composite panel 1 according to claim 1 of the present application is stretched, and as shown in FIG. Are arranged on the roof surface of the hut in such a manner that the groove G group and the ventilation layer G ′ can be ventilated from the eave part 8 to the ridge part 7, and the vertical beams 2W and 2W ′ of each panel 1 are arranged on the eaves girder 21E and the main building 22B. , Fixed to purlin 22A.
In this case, each panel 1 is fixed as shown in FIG. 5 (A). The vertical connection of each panel 1 is an abutting contact form of the heat insulating layer 2B, and the left / right connection is shown in FIG. 5 (B). As described above, a conventional long screw, for example, a diameter of 5.5 mm and a length of 180 mm, Sanko Techno Co. ) Course thread (trade name) may be inserted into the eaves girder 21E, purlin 22B, and purlin 22A through the top surface of the roof base material 2A or through the vertical beams 2W and 2W ′ also used as the rafters.

Therefore, the roof composite panel 1 can be prepared as a homogenous product for factory production and has the vertical rails 2W and 2W ′ that also serve as field rafters. It can be constructed by a simple driving and fixing work to the roof, and a homogeneous and reliable air-permeable outer insulation roof structure can be obtained.
And, on the roof surface on which the roof composite panel 1 is stretched, a conventional airtight tape (not shown) is stretched on the upper and lower abutment interfaces hf ′ of the roof base material 2A of each panel 1, Since the left and right contact interface vf of the roof base material 2A is protected by the ventilation trunk edge 2D ′, a conventional waterproof sheet 9 and a roof finishing material 10 are stretched on the upper surface of the roof composite panel 1 without applying an airtight tape. Just set up.

In the finished roof structure, two half-width vertical beams 2W ′ are combined at the panel left and right connection portions, so that the roof strength is uniform, and the heat insulating layer 2B is flush with the vertical beams 2W and 2W ′. Therefore, the insulation layer 2B is prevented from falling off the vertical rails 2W and 2W ′ by the purlin 22A, the purlin 22B, and the eaves girder 21E.
Then, as shown in FIG. 6, the air flow a uniformly flows through the roof surface of the roof surface from the eaves portion 8 to the ridge portion 7 in the ventilation layer G ′ and the groove G, as shown in FIG. In ′, solar heat from the roof surface is emitted from the ridge portion 7 by the air flow a as the heat shield reflection layer 2C as radiant heat, and in the groove G, moisture from the heat insulating layer 2B is radiated by the air flow a. It becomes the outer heat insulation roof which discharge | releases from the part 7, suppresses the damage by the overheating of a roof surface, reduces the heat storage of the heat insulation layer 2B, and also discharge | releases the water vapor | steam (humidity) from a heat insulation layer.

  In the roof structure of the present invention, as shown in FIG. 3, the ridge panel 1A is prepared by projecting the roof base material 2A at the lower end so as to project the phase difference step d1, and the intermediate panel 1B is The roof base material 2A is prepared by allowing the upper end portion to enter the phase defect step d1, and the lower end portion to project the phase defect step d1, and the eaves panel 1C enters the roof base material 2A at the upper end portion. The lower end portion projects a large step d2, and the panels 1A, 1B, and 1C protrude on both sides of the ventilation trunk edge 2D 'at the one side edge 1R and the phase gap step d4 at the other side edge 1L. As shown in FIGS. 5 (A) and 5 (B), the ridge panel 1A, the intermediate panel 1B and the eaves panel 1C are joined to each other vertically and laterally as shown in FIGS. The lower end of the roof base material 2A of the panel 1C for the part is fixed on the nose cover 23A. Te, preferably arranged an air inlet gap ad between the fascia 23A and the panel insulation layer end surface Ds.

In this case, as shown in FIG. 7B, if the notch C23 for placing the end of the roof base material 2A is arranged on the upper surface of the nose cover 23A, the roof base material 2A and the upper surface of the nose cover 23A Can be fixed flush with each other, and the installation work of the waterproof sheet 9 and the roofing material 10 on the upper surface of the panel 1 becomes easy.
Accordingly, the top and bottom and left and right abutting connections of each roof panel 1 are phase-separated joints, facilitating connection work without any gap between the panels, and the vertical (vertical) contact interface vf of the roof base material 2A. Since the longitudinal contact interface vf ′ of the ventilation trunk edge 2D ′ deviates from the phase gap step d4, the vertical contact interface vf of the roof base material 2A and the vertical contact interface vf of the vertical rail 2W ′ are the ventilation trunk edge 2D. In the left and right phase missing connection parts of each panel 1, the processing with a conventional airtight tape becomes unnecessary, and it is only necessary to apply the airtight tape only to the upper and lower connection parts of each panel 1. Improves.

  Since the eaves part panel 1C protrudes from the lower end of the roof base material 2A by a large step d2 (standard: 30 mm), as shown in FIG. Standard: 15mm) is placed on the nasal concealment 23A and naild, and between the bottom surface Ds of the heat insulating layer and the inner surface of the nasal concealment 23A, 1/2 dimension of the large step d2 (standard: 15mm) The space ad can be formed, and the air inflow interval ad into the panel air-permeable layer G ′ and the groove G group can be easily and properly formed by simply placing and fixing the panel 1, and the workability of roof construction Will improve.

The roof composite panel 1 according to the present invention is placed on the purlin 22A, purlin 22B, and eaves girder 21E, and the panels 1 are placed in contact with each other, and the vertical beams 2W and 2W ′ are fixed to the roof with long screws. You can construct a wooden building roof with breathable outer insulation just by doing.
And the roof panel 1 is equipped with the heat insulation reflective layer 2C on the ceiling surface of the groove G group of the heat insulation layer 2B, and is equipped with the roof base material 2A, keeping the ventilation layer G 'on the upper surface of the heat insulation reflection layer 2C. Therefore, since the heat shield reflective layer 2C has a radiant heat reflecting function on the front and back surfaces, the heat entering the panel 1 from the roof surface is discharged from the ventilation layer G ′ as reflected radiant heat, and the heat to the heat insulating layer 2B is In the groove G, moisture (water vapor) is released from the heat insulating layer 2B, and part of the radiant heat released from the heat insulating layer 2B into the groove G is discharged to the outside, and part is the heat insulating layer. Since it will be re-added to 2B, it will protect the interior from heat insulation throughout the summer and winter, and will provide an excellent heat insulation function to provide an energy-saving roof for wooden buildings.

And since the heat shield reflective layer 2C covers the ceiling surface of the groove G group of the heat insulating layer 2B, a part of the radiant heat released from the heat insulating layer 2B into the groove G is again transferred to the heat insulating layer 2B. The heat insulation defect due to the arrangement of the groove G group can be suitably compensated for by the heat shield reflection layer 2C, and the layer thickness T5 (standard: 135 mm) of the heat insulation layer 2B is below the required reference thickness. Notch arrangement of the groove G group is possible.
In addition, the heat applied from the roof surface to the roof base material 2A is released from the ventilation layer G ′ as radiant heat by the heat shield reflective layer 2C, and therefore does not become a load on the heat insulating layer 2B.
Therefore, the roof composite panel 1 of the present invention can easily and uniformly construct a high-performance breathable outer heat insulating roof that releases moisture in the panel and protects heat from the roof surface from heat insulation.

In addition, the roof composite panel 1 can be prepared as a homogenous product for factory production, and is equipped with vertical rails 2W and 2W ′ that also serve as field rafters. In the direction, the heat-insulating layers are abutted against each other, and in the left-right direction, the vertical beam 2W ′ is abutted against the side edge of the ventilation trunk edge 2D ′ and fixed to the roof of the roof by the abutting abutment. A highly reliable outer insulation roof structure.
In the finished roof structure, from the eave part 8 to the ridge part 7, the air flow a causes the ventilation layer G ′ on the lower surface of the roof base material 2A and the groove G group on the upper surface of the heat insulating layer 2B to cover the entire roof surface. The ventilation layer G ′ on the upper surface of the heat shield reflective layer 2C releases the radiant heat entering from the roof surface to thermally protect the heat insulating layer 2B. In Group G, moisture that causes a decrease in the heat insulation function is released, so that damage to the roof surface due to overheating is suppressed, the heat insulation layer 2B is thermally protected, and an external heat insulation roof having excellent weather resistance is obtained.

[Structure of roof composite panel (Fig. 1, Fig. 3)]
The roof composite panel 1 has a heat-insulating / reflective layer 2C disposed on a heat-insulating layer 2B including a field rafter, a roof base material 2A is disposed on the heat-insulating / reflective layer 2C, and ventilation layers G are formed on the ventilation trunk edges 2D and 2D ′. 1 (A) is a perspective view of the panel 1, and FIG. 1 (B) is a cross-sectional view taken along line BB in FIG. 1 (A).
3 is an overall perspective view of the roof composite panel 1. FIG. 3A shows a ridge panel 1A, FIG. 3B shows an intermediate panel 1B, and FIG. The eaves part panel 1C is shown.

  That is, as shown in FIGS. 1 (A) and 1 (B), the cross-sectional structure of the roof composite panel 1 is a vertical beam 2W having a function of a field rafter and having a width a1 of 45.5 mm at the center of the width of the heat insulating layer 2B. The vertical beam 2W ′ having a width of half width a2 is integrated with the heat insulating layer 2B on both sides of the heat insulating layer 2B, with the lower surface and the upper surface being in one form with respect to the heat insulating layer 2B. The heat shield reflective layer 2C is attached to the wall 2T, the groove G, and the vertical rails 2W and 2W ′ of the layer 2B in a form of surface contact, and the vertical rails 2W and 2W on the thermal barrier reflective layer 2C are attached. Ventilation rims 2D and 2D 'are arranged at 2W', and a roof base material having a thickness of T4 (12 mm) from above the ventilation rims 2D and 2D 'is passed through the ventilation rims 2D and 2D' with a nail n. It is cast and integrated on the vertical bars 2W and 2W ′.

  A ventilation layer G ′ is formed between the heat shield reflection layer 2C and the roof base material 2A with the thickness of the ventilation trunk edges 2D and 2D ′ (standard thickness T6: 20 mm), and the ventilation trunk edge 2D, As shown in FIG. 1 (B), the arrangement of 2D ′ is such that the central ventilator edge 2D is arranged in the central vertical beam 2W part, and the ventilator edges 2D ′ on both side edges are arranged in the vertical beam 2W ′ parts on both sides. Further, one side (1R) of the ventilator edge 2D ′ protrudes from the panel side edge of the phase defect step d4 (10 mm), and the other side (1L) of the ventilator edge 2D ′ projects from the panel side edge of the phase defect step d4 (10 mm). A nail n is driven in from the upper surface of the roof base material 2A in the inserted form, and the width a1 of the thick portion 2T of the heat insulating layer 2B, the width a1 of the vertical beam 2W, the width a1 of the groove G, etc. The depth G'd of the ventilation layer G 'is 20 mm, the depth Gd of the groove G is 15 mm, the panel width AW is 910 mm, and the panel thickness T3 is 17 It is a mm panel of.

  Further, as shown in FIG. 3, the ridge panel 1A, the intermediate panel 1B, and the eaves panel 1C all have the same cross-sectional shape and the same width AW (910 mm). The heat insulation layer length BL is 1820 mm, and the length AL of the roof base material 2A is the same as the heat insulation layer 2B, with the upper end (upper right edge in the drawing) being flush and the lower end protruding 20 mm (d1). The intermediate panel 1B determines the length BL of the heat insulation layer 2B according to the dimensions from the roof ridge to the eaves, but the standard type has a heat insulation layer length BL of 1820mm and a roof base. The length AL of the material 2A is such that the upper end enters a phase defect step 20 mm (d1) and the lower end protrudes 20 mm (d1) at the upper end. The BL is 1820mm, and the length AL of the roof base material 2A is heat insulation. 2B hand, in the upper end enters a phase missing step 20 mm (d1), the lower end is obtained by 30 mm (d2) projected.

[Production of roof composite panel (Figure 2)]
2A and 2B are exploded explanatory views of the panel 1. FIG. 2A is a perspective view of the roof base material 2A, FIG. 2B is a perspective view of the trunk edges 2D and 2D ′, and FIG. (D) is a perspective view of the heat insulation layer 2B, (E) is an exploded perspective view of the heat insulation layer 2B.
As shown in FIGS. 4 (A) and 4 (B), the heat-shielding reflection layer 2C has two core members 20 each having an air-filled projection 20b group having a diameter of 10 mm on a plastic sheet 20a, with the projection 20b group surface facing each other. The heat-shielding reflection sheet 2C having a thickness of 8 mm is used in which the layers are integrated and the aluminum foil is layered on the front and back surfaces.
The sheet 2C is available from Sakai Chemical Industry Co., Ltd. as Ramipack SD-W (trade name).

  As the heat insulating layer 2B, as shown in FIG. 2 (E), a heat insulating plate 2B of an extruded polystyrene foam plate (JISA 9511) having a thickness T5 of 135 mm is formed with a width of 409.5 mm (BW) and a length of 1820 mm (BL). A groove G group having a width of 45.5 mm and a depth Gd of 15 mm is cut and arranged between the thick portions 2T having a width of 45.5 mm on the upper surface of the heat insulating plate.

  In addition, a wood vertical beam 2W having a width of 45.5 mm and a thickness of 135 mm and a vertical beam 2W ′ of wood having a width of 22.75 mm and a thickness of 135 mm are prepared, and the wide vertical beam 2W is sandwiched therebetween as shown in FIG. ), The heat insulating plates 2B are bonded and fixed to both sides, the half-width vertical beam 2W ′ is bonded and fixed to both sides of the heat insulating layer 2B, and the vertical beams 2W and 2W ′ are integrated with the heat insulating plate 2B. A heat insulating layer 2B having a width AW of 910 mm and a length BL of 1820 mm shown in FIG.

In addition, as the heat shield reflective layer 2C, as shown in FIG. 4, 8 mm thick Lamipack SD-W (trade name, manufactured by Sakai Chemical Industry Co., Ltd.) having aluminum foil layers on both sides is used, as shown in FIG. ), The width AW is 910 mm and the length BL is 1820 mm.
Next, as shown in FIG. 1 (B), an adhesive is applied to the upper surface of the thick portion 2T and the upper surfaces of the vertical rails 2W and 2W ′ of the heat insulating layer 2B, and the surface BL is 1820 mm. A heat insulating layer 2B having a width AW of 910 mm and having a heat shield reflective layer 2C applied thereto is obtained.

  Then, as shown in FIG. 2 (B), a square member having a width a3 of 33 mm, a thickness T6 of 20 mm and a length BL (1820 mm) is used as a ventilation trunk edge 2D for both sides as a ventilation trunk edge of wood. Is prepared as a central ventilator edge 2D, and as shown in FIG. 1B, the central ventilator edge 2D is connected to the central vertical rail 2W. Both side ventilator rims 2D 'are located in the part, both sides of the vertical beam 2W' part, and one side (1R) of the ventilator rim 2D 'protrude from the panel side edge 1R with a phase gap d4 (10 mm). In the form, the other side (1L) of the ventilation trunk edge 2D ′ is bonded and fixed to the upper surface of the heat shield reflective layer 2C in such a form that the phase gap step d4 (10 mm) enters from the panel side edge 1L.

The roof base material 2A is a lightweight (10 kg / m ² ), high strength (240 kgf / cm ² ), 12 mm thick structural plywood (JASS standard product) with the same width (910 mm) as the heat insulating layer 2B. prepare.
Then, as shown in FIG. 3, the ridge panel 1A has the roof base material 2A with the heat insulating layer 2B, with the upper end being flush with the heat insulating layer 2B and the lower end projecting d1 (20 mm). As shown in FIG. 1 (B), an adhesive is applied and fixed to the upper surface of the ventilator edges 2D and 2D ′ that are bonded and fixed to the upper surface of the reflective layer 2C, and at the vertical rails 2W and 2W ′ of the heat insulating layer 2B. The roof base material 2A is bonded and integrated through the ventilator edges 2D and 2D ′, and if necessary, fixed to the vertical rails 2W and 2W ′ with nails n to obtain the roof composite panel 1A for the ridge part. .

Similarly, the intermediate panel 1B includes the heat insulation layer 2C having a heat shielding / reflective layer 2C in which the roof base material 2A enters the heat insulation layer 2B by d1 (20 mm) at the upper end and d1 (20 mm) at the lower end. The roof panel 1B for the intermediate part is obtained by integrally fixing through 2B and the ventilator edges 2D and 2D ′.
Similarly, the eaves part panel 1C includes the roof base material 2A with respect to the heat insulating layer 2B, d1 (20 mm) at the upper end and d2 (30 mm) protruding at the lower end, and the heat shielding reflection layer 2C. The roof panel 1C for eaves is obtained by integrally fixing through the heat insulating layer 2B and the ventilator edges 2D and 2D ′.

[Tensioning of roof composite panels (Figs. 6 and 7)]
FIG. 6 is a partially cutaway sectional view of a roof structure in which a roof composite panel 1 is stretched on a roof with a roof, FIG. 7A is a sectional view of a roof ridge portion, and FIG. It is sectional drawing of a part.
As shown in FIG. 6A, the roof of the hut is constructed by a conventional method, and includes pillars 21A and 21B, shed bundle 22C, purlin 22A, purlin 22B, and eaves girder 21E.

Then, the roof panels 1A, 1B, 1C are placed on the purlin 22A, purlin 22B, and eaves girder 21E of the roof of the hut, with the abutting contact of the heat insulating layer 2B in the vertical direction, and the ventilation trunk edge 2D in the horizontal direction. ′ A vertical frame 2W ′ having a half width at the side edge of the panel is arranged by abutting and abutting with each other, and each panel 1A, 1B, 1C is arranged on the vertical beam 2W, 2W ′ portion at the roof base material 2A. From the upper surface, a long screw (course thread (trade name) of Sanko Techno Co., Ltd.) having a diameter of 5.3 mm and a length of 180 mm is driven and fixed to the purlin 22A, purlin 22B, and eaves girder 21E on the lower surface of the panel.
The long screw has five times the strength of steel round nails for woodwork of JIS A5508 (allowable shear strength: 70 kgf / piece), so the interval between the long screws can be widened, and the eaves 21E, purlin 22B, purlin 22A Splitting can be suppressed and workability is good.

Therefore, in each of the stretched panels 1A, 1B, 1C, the left and right contact portions of each panel are abutted against the vertical beam 2W ′ of each panel whose side surfaces are flush as shown in FIG. 5B. In the configuration, the ventilator edges 2D ′ are mutually phase-separated, so that two vertical bars 2W ′ having a width a2 (22.75 mm) come into contact with each other at the left and right joint portions of the panel, and the width a1 (45. 5mm), the roof surface is arranged with rafters (vertical bars) of equal width (45.5mm), and guarantees uniform roof strength.
In addition, as shown in FIG. 5B, the left and right abutting portions protect the abutting interface vf between the roof base material 2A and the vertical rail 2W ′ by the ventilation trunk edge 2D ′. Airtight tape processing is unnecessary.

Then, a conventional airtight tape is attached to the vertical contact portion of the panel 1, that is, the lateral contact interface hf of the roof base material 2 </ b> A for airtight treatment.
Moreover, the lower end of the eaves part panel 1C is, as shown in FIG. 7B, a notch C23 on the upper surface of the nose cover 23A, the lower end protrusion d2 (standard: 30 mm) of the roof base material 2A, and a tip half size of 15 mm. And a nailing space 23a is formed between the nasal concealment 23A and the panel heat insulating layer lower end surface Ds, and the air gap ad is a half size (15 mm) of the lower end protrusion d2.

As shown in FIG. 7 (A), the roof finishing is performed by a conventional method, as shown in FIG. 7A. The waterproof sheet 9 and the roof finishing material 10 are arranged. In the ridge 7, the ridge base material 25C and the ridge ventilation material 25B are arranged. The building material 25A, the draining material 25D, and the waterproofing material 25E form a conventional ventilation structure, and the rising air flow a flowing in from the gap ad (15 mm) of the nose cover 23A is converted into a ventilation layer G ′ (depth G′d). : 20 mm) and a panel groove G (depth Gd: 15 mm, width a1: 45.5 mm) through the upper and lower two-stage ventilation layer, the structure is discharged from the ridge 7.
Therefore, the roof structure constructed in this example is that the upper and lower left and right joints of the roof composite panel 1 are phase-separated and that the vertical bars 2W and 2W 'of the panels also serve as rafters, The group tensioning was fixed with long screws in the vertical bars 2W and 2W ′, so that the workability was improved.

  And since the front and back surfaces have a reflection function and the heat-shielding reflection layer 2C having a heat insulation function is interposed between the lower surface of the ventilation layer G ′ and the upper surface of the groove G, the heat insulation layer against heating from the roof surface 2B protection, cooling protection against overheating of the roof surface, moisture release function in the panel 1 in the groove group G notched in the heat insulating layer 2B, and heat of heat insulation defects generated by cutting the groove group G Compensation action is possible, and it has become a ventilated roof with excellent heat insulation function, which is effective for energy saving, both in heating in winter and in cooling in summer.

[Others]
In the embodiment, Lamipack SD-W (trade name) is adopted as the heat shield reflective layer 2C. However, the heat shield reflective layer 2C includes a reflective layer on the front and back surfaces, and in the ventilation layer G ′ and the groove G. Since it is only necessary to reflect the heat rays entering the inside, the intended purpose can be achieved even if a conventional double-sided aluminum foil sheet is adopted.
In this case, since the aluminum film is a flexible thin sheet, the sandwiched and integrated holding operation at the ventilator edges 2D and 2D ′ is easy.

It is explanatory drawing of the roof composite panel of this invention, Comprising: (A) is a whole perspective view, (B) is the BB sectional drawing of (A). It is a disassembled explanatory drawing of a roof composite panel, (A) is a perspective view of a roof base, (B) is a perspective view of a ventilation trunk edge, (C) is a perspective view of a heat-shielding reflection layer, (D) is a heat insulation layer (E) is an exploded perspective view of a heat insulation layer. It is a perspective view of a roof composite panel, (A) is a panel for ridge parts, (B) is a panel for intermediate parts, (C) is a figure showing a panel for eaves parts. It is explanatory drawing of a heat shield reflective layer, Comprising: (A) is sectional drawing of a heat shield reflective layer, (B) is the BB sectional drawing of (A). It is joining explanatory drawing of roof composite panels, Comprising: (A) is a figure showing the cross section of an up-and-down connection part, (B) is a figure showing the cross section of a right-and-left connection part. It is a partially cutaway sectional view of the roof structure of the present invention. It is the elements on larger scale of FIG. 6, Comprising: (A) is a ridge part, (B) is a figure showing an eaves part. It is a prior art figure, Comprising: (A) is a partially notched principal part perspective view of the prior art example 1, (B) is a partially notched perspective view of the prior art example 2, (C) is a perspective view of the prior art example 3. FIG.

Explanation of symbols

1 Roof composite panels (roof panels, panels)
1A Building panel (roof panel, panel)
1B Intermediate panel (roof panel, panel)
1C Eaves panel (roof panel, panel)
1L, 1R side edge (side)
2A Roof base material 2B Heat insulation layer (heat insulation plate)
2C Heat shield reflective layer (heat shield reflective sheet)
2D, 2D 'Venting trunk edge 2S Layered surface 2T Thick part 2W, 2W' Vertical beam 7 Building part 8 Eave part 9 Waterproof sheet 10 Roofing material 20 Core material 20a Plastic resin sheet (sheet)
20b Protrusion 20c Aluminum foil 21A, 21B Pillar 21E Eaves girder 22A Purlin 22B Purlin 22C Hut bundle 23A, 23B Nasal concealment 25A Building material 25B Building ventilation material 25C Building base material 25D Drainage material 25E Waterproof treatment material a Air flow (air)
ad interval C23 notch Ds heat insulation layer lower end face G groove (groove for ventilation)
G ′ vent layer Gd groove depth G′d vent layer depth hf, hf ′ horizontal contact interface (lateral contact interface)
n nail R roof vf, vf ′ longitudinal contact interface wf wooden frame

Claims (8)

  A roof composite panel (1) in which a heat insulating layer (2B) and a roof base material (2A) are layered and integrated with each other through a heat-shielding reflection layer, and the heat insulating layer (2B) is formed on the layering surface (2S). In addition, the ventilation groove (G) and the thick part (2T) are alternately provided in parallel, and the vertical beam (2W, 2W '), and the heat-insulating / reflective layer (2C) having a radiation heat reflecting function on both sides is arranged on the surface (2S) of the heat insulating layer (2B) including the vertical bars (2W, 2W'). The roof base material (2A) covering the entire width of the panel is integrated on the upper surface of the heat-shielding reflection layer (2C) with the ventilation layer (G ') secured through the ventilation trunk edges (2D, 2D'). Breathable roof composite panel.   The width of the groove (G), the width of the thick portion (2T), and the width of the vertical beam (2W) at the center of the heat insulating layer (2B) are equal, and the vertical beam (2W) on the side edge of the heat insulating layer The width | variety of ') is a roof composite panel of Claim 1 which is 1/2 of the width | variety of the vertical beam (2W) of a center part.   Two layers of the core material (20) in which the heat shielding reflection layer (2C) is provided with the projections (20b) group on the plastic resin sheet (20a) are layered so that the projection (20b) group surfaces face each other. The roof composite panel according to claim 1 or 2, wherein the roof composite panel is a heat-shielding reflection sheet (2C) in which an aluminum foil (20c) is layered on the surface of the sheet (20a).   The roof composite panel according to claim 3, wherein the heat-shielding reflection sheet (2C) has a thickness (T2) of 8 mm and has a heat insulating effect corresponding to a thickness of 5 to 7 mm of the heat insulating layer (2B).   The heat insulation layer (2B) is an extruded polystyrene foam plate having a thickness (T5) of 135 mm, the depth (Gd) of the groove (G) is 15 mm, and the total area of the groove (G) is the panel area. The roof composite panel according to claim 1, wherein the roof composite panel is 1/2 of the above.   Both sides of the panel (1) are flush with each other, and the ventilation trunk edge (2D ') of one side edge (1R) protrudes from the side edge (1R) to the phase gap step (d4), and the other side edge (1L) The roof composite panel according to any one of claims 1 to 5, wherein the ventilator edge (2D ') enters the phase gap step (d4) from the side edge (1L).   A wooden exterior heat insulating roof structure in which the roof composite panel (1) according to claim 1 is stretched, wherein the roof composite panel (1) is formed into a groove (G) from the eaves part (8) to the ridge part (7). ) Group and ventilation layer (G ') are arranged on the roof surface of the roof so that they can be ventilated. (22A) A wooden external heat insulating roof structure fixed to (22A).   The ridge part panel (1A) is prepared by causing the roof base material (2A) to protrude at the lower end part by projecting the phase gap (d1), and the intermediate part panel (1B) is provided with the roof base material (2A) at the upper end part. The phase gap step (d1) is made to enter and the phase gap step (d1) protrudes at the lower end portion, and the eaves part panel (1C) has the roof base material (2A) and the phase gap step (d1) at the upper end portion. ) And a large step (d2) at the lower end, and each panel (1A, 1B, 1C) has the ventilator edge (2D ') on both sides and the phase gap ( d4) Protruding and entering the phase gap step (d4) at the other side edge (1L) to prepare the building panel (1A), the intermediate panel (1B) and the eaves panel (1C) In addition to jointing to the left and right, the lower end of the roof base material (2A) of the eaves panel (1C) is covered with a nose (23 ) Fixed onto and arranged an air inlet gap (ad) between the fascia (23A) and the panel insulation layer end face (Ds), wooden outer clad insulation roof construction according to claim 7.

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