JP4827176B2 - Heat shield sheet and attic heat shield structure - Google Patents

Description

  The present invention relates to a heat shield sheet and a heat shield structure for an attic, and more particularly, is inexpensive and has excellent heat shield properties, handling properties, and workability, and heat shield of an attic using the heat shield sheet. Concerning structure.

  Conventionally, a living room directly under a roof in a wooden house has a problem that the ceiling plate is heated by the heat of the attic especially in the summer, and the temperature of the living room is increased by the radiant heat from the ceiling plate, thereby reducing the cooling effect.

  For the purpose of suppressing the temperature rise of the room in the summer as described above, a method of attaching a heat insulating material such as expanded polystyrene to the back surface of the field board has been proposed. In this method, heat is directly transferred from the roof material that has become hot due to solar radiation to the heat insulating material, the heat insulating material stores heat, and the ceiling board is heated by radiation of heat from the stored heat insulating material, resulting in insufficient heat insulating effect. Met. For the purpose of solving such a problem, Patent Document 1 describes that corrugated paper is used as a ventilation layer securing member in order to secure a ventilation layer between the base plate and the heat insulating material. This corrugated paper as a ventilation layer securing member is sandwiched between rafters supporting the base plate in a state where both ends are bent, and a space is provided between the base plate and the heat insulating material to make the space breathable. High temperature air is exhausted. Although this air-permeable layer securing member is inexpensive, excellent in handleability, and exhausts air from the attic that has become hot, it is effective to some extent, but is insufficient in terms of heat shielding properties against intense radiant heat in summer.

Further, a heat insulating material has been proposed in which metal foil is attached to both surfaces of a plastic air mat as a heat shield sheet (see Patent Document 2). Further, as a heat insulating material for suppressing an increase in the attic temperature, a heat insulating material for a roof formed by covering both surfaces of a plate-like inorganic fiber heat insulating material with a moisture-permeable skin material has been proposed (see Patent Document 3).
JP 2001-227080 A Japanese Patent Laid-Open No. 10-280577 JP-A-8-027919

  Although the ventilation layer securing member described in Patent Document 1 is effective for preventing condensation in winter, the heat shielding effect is insufficient, and the heat shielding effect in summer is insufficient. Moreover, although the heat insulating material of the said patent document 2 is effective for heat insulation in the summer, the temperature of the space between a heat insulating material and a ceiling board is the space between a heat insulating material and a field board in winter. As a result, condensation occurs on the surface of the heat insulating material (attic side), and soot is generated on each member on the attic side, thereby shortening the life of the house. Moreover, although the said heat insulating material has the outstanding heat insulation effect, since metal foil is bonded on both surfaces of an air mat, there exists a problem that it is expensive. Moreover, although the heat insulating material of the said patent document 3 is excellent in heat insulation and dew condensation resistance, there exists a problem that it is inferior to workability from the shape being a hard plate shape.

  Accordingly, an object of the present invention is to provide a heat shield sheet that is inexpensive and excellent in heat shield properties (heat insulation properties), handling properties, workability, and dew condensation prevention properties, and a heat shield structure for an attic using the heat shield sheet. That is.

  The above object is achieved by the present invention described below. That is, the present invention is a rectangular shape in which a reflective layer made of an aluminum foil or an aluminum vapor-deposited resin film is bonded to at least one surface of corrugated paper having a corrugated paper sandwiched between an upper paperboard and a lower paperboard. In the heat-shielding sheet, at least two fold lines parallel to the longitudinal direction of the sheet, which can be folded in a prismatic shape with the corner facing inward, at least at one corner of the sheet, and perpendicular to the longitudinal direction of the sheet Provided is the above-described heat shield sheet, wherein one cut line is provided.

  In the heat shield sheet of the present invention, the reflective layer is an aluminum vapor-deposited resin film; the heat shield sheet has a short side (width) of 100 to 1,000 mm and a long side (length). 200 to 3,000 mm, and the corrugated direction of the corrugated paper is parallel to the long side direction of the heat shield sheet; the reflective layer is bonded to both sides of the cardboard paper; A cut auxiliary line having an angle with respect to the end portion of the heat shield sheet is provided on the entire surface; and the perforation formed from a linear hole in which the bending line, the cut line, and the cut auxiliary line are continuous. It is preferable.

  Further, the present invention is an attic structure comprising a field board and a plurality of rafters supporting the field board, and the heat shield sheet of the present invention is provided with at least one reflection between the plurality of adjacent rafters. Provided is an attic heat-insulating structure characterized in that a space is formed between a base plate and a layer so that the layer faces the base plate.

  In the heat shield structure of the present invention, the short side (width) of the heat shield sheet is larger than the interval between the inner side surfaces of adjacent rafters, and both ends of the heat shield sheet are connected to the heat shield sheet. The bent sheet is bent at a substantially right angle with respect to the horizontal plane, the bent piece is brought into contact with the side surface of the adjacent rafter, and the heat insulating sheet is held between the side surfaces of the adjacent rafters by the bending repulsive force of the bent heat insulating sheet. The bent piece of the heat shield sheet is brought into contact with the side face of the adjacent rafter, and the heat shield sheet is fixed between the side faces of the adjacent rafters by the fixture through the bent piece: formed by the field plate and the rafter. There is a member for fixing the rafter in the space to be formed, and the corner portion of the heat shield sheet corresponding to the member is bent inward along the folding line; and further heat insulation on the indoor side of the heat shield sheet The material is placed It is preferable.

  According to the present invention, it is possible to provide a heat shield sheet that is inexpensive and excellent in heat shield properties, handleability, workability, and dew condensation prevention properties, and an attic heat shield structure using the heat shield sheet.

Next, the present invention will be described in more detail based on preferred embodiments shown in the drawings.
As shown in the partially omitted overall perspective view shown in FIG. 1 and a partially enlarged view of the heat shield sheet A according to one embodiment of the present invention, corrugated paperboard 3 is provided between the upper paperboard 1 and the lower paperboard 2. In a rectangular heat shield sheet in which a reflective layer 4 made of aluminum foil or an aluminum vapor-deposited resin film is bonded to at least one surface of a corrugated cardboard that is sandwiched, at least one corner of the sheet, the corner At least two fold lines parallel to the longitudinal direction of the sheet and one cut line perpendicular to the longitudinal direction of the sheet are provided.

  The corrugated paper is a corrugated paper that has been widely used as various packaging materials in the past, and is not particularly limited. Any conventionally known corrugated paper can be used in the present invention. Moreover, the reflective layer 4 stuck on at least one surface of said corrugated paper is comprised from the aluminum foil or the aluminum vapor deposition resin film. When the reflective layer 4 is provided only on one side of the corrugated cardboard, the reflective layer 4 is arranged so as to face the base plate in a heat shield structure described later. By doing in this way, in summer, the heat rays radiated from the field board 5 side can be satisfactorily reflected and blocked to suppress the rise in the temperature of the attic. There is no reduction. The reflective layer 4 may be provided on both sides of the cardboard paper. By arranging the reflective layer 4 on the indoor side or on the ceiling side of the living room, in winter, the reflective layer 4 reflects the heat rays radiated from the indoor side having a temperature higher than the outside air temperature, thereby suppressing the temperature decrease on the indoor side. be able to.

  The reflective layer 4 may be an aluminum foil, but is preferably an aluminum vapor-deposited resin film that is cheaper and easy to apply to corrugated paper. Various plastic films can be used as the resin film used for this, but films such as polyethylene, polypropylene, and polyethylene terephthalate are preferable from the viewpoint of cost. Any commercially available aluminum vapor deposited resin film can be used, and the thickness of the aluminum vapor deposited layer and the resin film is not particularly limited. Moreover, it is preferable that the said aluminum vapor deposition resin film is affixed so that a resin film may become an outer side with respect to corrugated paper. By sticking in this way, the aluminum vapor deposition layer which is easily altered by moisture becomes sandwiched between the adhesive used for sticking to the resin film, and the durability of the aluminum vapor deposition layer is improved.

  The shape of the heat shield sheet A of the present invention is rectangular, its short side (width) is preferably 100 to 1,000 mm, and the long side (length) is preferably 200 to 3,000 mm. Moreover, it is preferable that the direction of the peaks and valleys formed by the corrugated paperboard 3 is parallel to the long side direction of the heat shield sheet. The rectangular shape described above is a heat shield structure described later, and has a length substantially the same as the length direction of the space formed by the field board and rafters, and the inner space between adjacent rafter sides is Xmm. The width of the side is preferably 1.05 to 1.5 times X, for example, X × 1.05 mm to X × 1.5 mm. The reason will be described later.

  In addition to the above configuration, the heat shield sheet A of the present invention is parallel to the longitudinal direction of the sheet, and can be bent into at least one corner of the sheet in a prismatic shape with the corner facing inward. At least two fold lines and one cut line perpendicular to the longitudinal direction of the sheet are provided. Further, as in the heat shield sheet A of FIG. 1, a bending line and a cut line are provided at the four corners, respectively, so that the rafters are fixed to any of the four corner portions when the heat shield sheet is applied. Even if is located, it is preferable because the heat shield sheet can be easily constructed between the rafters. Further, when there are two folding lines, the prismatic shape formed by bending is a triangular prism shape, when it is three, it is a quadrangular prism shape, and when it is four, it is shown in FIG. It becomes a square column shape with a fold. The number of the folding lines is preferably four as shown in the drawing because the prismatic shape formed by folding can easily maintain the shape. The effect of the cut line will be described later.

  In addition, the heat shield sheet A according to another embodiment of the present invention has an angle with respect to the end of the heat shield sheet A on both sides of the heat shield sheet A or the entire surface of one side as shown in FIG. A number of cutting aid lines 15 are provided. The cut auxiliary lines 15 are preferably provided so as to intersect with each other and have an angle of about 45 degrees at an arbitrary portion of the heat shield sheet A. For example, the cut auxiliary lines 15 can be easily formed along the cut auxiliary line 15 with a scissors or a cutter knife. Try to cut it out. A method of using the heat shield sheet A of this embodiment will be described later.

  The heat shield sheet of the present invention as described above is effective as a heat shield sheet for an attic, and when the attic is heat shielded using the heat shield sheet of the present invention as will be described later, it penetrates through the field plate in the summer. By effectively reflecting and blocking the incoming heat, the temperature rise in the attic can be suppressed more efficiently. Further, the heat shield sheet of the present invention is not limited to the heat shield of the attic, can be used as various heat shield sheets such as the wall surface, floor surface, and ceiling of the building, and is not limited to the building material, and is a cushion material, packing It can also be used as a thermal insulation sheet for other materials.

  The heat insulation structure of the attic of the present invention, as shown in FIGS. 3 and 4, is an attic structure comprising a field board 5 and a plurality of rafters 6, 6, 6... Supporting the field board 5. Between the plurality of rafters 6, 6, 6..., A space 7 is formed between the base plate 5 and the heat shield sheet A of the present invention, as shown in the enlarged view of FIG. The reflective layer 4 is disposed so as to face the base plate 5.

  Moreover, in the said heat insulation structure, the fixing method of the heat insulation sheet A also has the characteristic of this invention, Preferably, as shown in FIG. 2, the heat insulation sheet A is formed in a rectangle, and the length is set as the rafters on both sides. It is substantially the same as the length direction of the space formed by the field plate, and its width is made larger than the interval X between the opposite side surfaces of the adjacent rafters, and both end portions of the heat shield sheet are placed on the horizontal plane of the heat shield sheet. The bent piece 8 is brought into contact with the side face of the adjacent rafter and held between the rafters. For this purpose, the width of the heat shield sheet A is preferably 1.05 times to 1.5 times the distance X. In particular, the two ends are folded in half as shown in FIG. 2 to form a mountain b, and the top of this mountain is abutted against the field plate 5 as shown in FIG. An appropriate space 7 can be formed.

  When the two ends are folded in half, a suitable space 7 can be easily formed between the base plate 5 by setting the height α of the crest b to about 20 mm to 70 mm. Moreover, by bending so that the lower end part of the bending piece 8 which contact | connects the side surface of the rafter 6 may be located about 10-50 mm ((beta)) downward from the horizontal part of a thermal insulation sheet, this bending piece 8 and the side surface of the rafter 6 are obtained. The contact surface is enlarged, and the heat shield sheet A folded as described above is simply pushed between the rafters, and the heat shield sheet A is held between the rafters without using any fixing tool by the repulsive force of the bent portion. Workability is significantly improved. Of course, the heat shield sheet A may be fixed to the side surface of the rafter 6 by using various fixing tools such as staples and tuckers using the lower part of the bent piece 8.

  When the heat shield sheet A is folded, the folding line coincides with the direction of the peaks and valleys formed by corrugated paperboard, so that it can be easily folded. Furthermore, it is more preferable in that the perforation formed from continuous linear holes is provided at the same position as the folding line, or the above-mentioned perforation also serves as the folding line, so that the workability of folding can be improved. . In addition, even if the interval between adjacent rafters is different, the interval between the above-mentioned peaks and valleys is as narrow as about 5 mm to 10 mm, so that a fold line can be arbitrarily selected. Accordingly, the folding line position can be easily determined at the construction site.

  The above description is useful when the space formed by the rafters 6, the girders 17 (or the head joints) and the field board 5 is the rectangle 13 in the roof structure shown in FIG. It is. However, in various roof structures, as shown in FIG. 6, at the end of the roof structure, the space formed by the rafters 6, the girders 17 and the field board 5 is substantially rectangular, but the rafters 6 and the girders In order to fix the rafter 6 to the girder 17 as shown in FIG. 6, a ceiling joist 18 may be provided. In this case, when constructing the heat shield sheet A in the space constituted by the rafters 6, the girders 17, and the field plate 5, the corners are applied to the ceiling joists 18 and the heat shield sheet A is constructed. I can't. The heat shield sheet A of the present invention can be applied in a space composed of the rafter 6, the girder 17, and the base plate 5 shown in FIG. 6.

  When constructing the heat shield sheet A of the present invention as shown in FIG. 1 in the space, as shown in FIG. 7, the four corners of the heat shield sheet A provided with the folding lines L1 to L4 and the cut line L5 are provided. The corner portion corresponding to the ceiling joist 18 is bent in a prismatic shape on the inner side using the folding lines L1 to L4 and the cut line L5, and a notch 19 is provided. If it is the thermal insulation sheet A provided with such a notch part 19, the thermal insulation sheet A can be easily constructed in a space as shown in FIG. 6 (FIG. 8). In addition, the length of the folding lines L1 to L4 used for forming the prismatic bent portion 20 described above, that is, the formation of the cutout portion 19, is usually about 50 to 300 mm. W1 and W3 are preferably about 20 to 150 mm, and W2 and W4 are preferably about 10 to 100 mm. The cut line L5 is preferably orthogonal to the folding lines L1 to L4, and the length thereof is preferably equal to W1 + W2 + W3 + W4.

  Further, in various roof structures, as shown in FIG. 5, the space formed by the rafters 6, the girders 17, and the base plate 5 or a part thereof is a trapezoid 14 or a triangle at the end of the roof structure. Occurs considerably. The heat shield sheet A shown in FIG. 1 cannot be applied to the space 14 as it is. Therefore, in a preferred embodiment of the present invention, as shown in FIG. 9, a cutting auxiliary line 15 is provided on both surfaces of the heat shield sheet A or the entire surface of the single side, and the cutting line 16 is arranged at any position along the auxiliary line 15, for example. The heat shield sheet A is cut into the same shape as the trapezoidal portion 14. If the heat shield sheet A has such a shape, the heat shield sheet A can be easily applied to the trapezoidal portion 14. The cut auxiliary line 15 may be formed by arbitrary printing or may be formed by arbitrary cutting. For example, the heat shielding sheet A is viewed from the front side with the heat shielding sheet of FIG. 9 standing so that the heat shielding sheet A can be cut with a scissors or a cutter knife at an angle of about 45 degrees with respect to the edge at an arbitrary position. In the state, it is preferable to provide the heat shield sheet at an angle of approximately 45 degrees with respect to both side ends. For example, when the space formed by the rafter 6, the girder 17 and the base plate 5 is the reference numeral 14 shown in FIG. 5, it is cut out as shown by the cut line 16 in FIG. By bending the end portion in the same manner as in the case of the sheet A, the trapezoidal portion of the space 14 formed by the rafter 6, the corner tree 21, and the base plate (not shown) is blocked as shown in FIG. Thermal sheet A can be constructed. Further, it is more preferable that the cut assisting line 15 is a perforation formed from a continuous linear hole since the workability of the cutting can be improved. Further, in the winter season, the condensed water even when the humidity on the indoor side becomes high moves from the perforated cut auxiliary line 15 formed on the corrugated paper to the ventilation layer, and therefore does not cause dew condensation. Even when the heat insulating material is arranged, the heat insulating property is not lowered. Further, when the cut auxiliary line 15 is provided with a perforation, it is preferable that the perforation does not exist in the vicinity of the intersection so that the heat shield sheet is not crushed and the workability is not impaired ( Not shown).

  In the embodiment of the present invention, as shown in FIG. 4, a normal heat insulating material 9 made of glass wool, rock wool, foam or the like may be installed on the indoor side of the heat shield sheet A. Such a heat shield structure of the present invention can efficiently reflect and block the heat rays entering through the field board especially in the summer, thereby preventing heat from entering the living room from the attic. Further, since a suitable space 7 is formed between the heat shield sheet A and the base plate 5 of the present invention, the temperature of the heat shield sheet A itself does not increase, and the room from the attic to the interior of the room. The heat radiation to the can also be kept low. Moreover, regarding the workability, the heat shield sheet of the present invention is simply inserted between the rafters, so the workability is greatly improved.

Next, the present invention will be described more specifically with reference to examples and comparative examples.
Example 1
A urethane adhesive for dry lamination was applied to the surface of the aluminum vapor-deposited layer of the aluminum vapor-deposited polyethylene film, and laminated on the upper paperboard of corrugated paper. Using this laminated paper as the upper paperboard, a corrugated paper having a thickness of 5 mm was produced according to a conventional method. The corrugated paper was cut into a length of 560 mm and a length of 850 mm with the side parallel to the peaks and valleys formed by corrugated paper of the corrugated paper as the heat shielding sheet of the present invention.

Example 2
Next, as shown in FIG. 11, a large number of rafters 6 of 38 mm × 89 mm × 4,000 mm are fixed on the purlin 10 and the distance between the side surfaces is 417 mm, and a field board 5 is stretched on the rafters 6 group, An asphalt roofing sheet was stretched thereon and an asphalt single roof material 11 was laid to form an attic structure. From the inside (indoor side) of this attic structure, the heat shield sheet A of Example 1 was fitted as follows. The heat shield sheet A was folded in two at both ends as shown in FIG. 2 at 200 mm from the center along the longitudinal direction. The height (α) of the peak b shown in FIG. 2 was 30 mm, and the difference (β) between the lower end of the bent piece 8 and the heat shield sheet body was 20 mm. Thus, when the heat-insulating sheet with both ends folded in half was inserted between the rafters and released, the heat-insulating sheet was fixed between the rafters by the repulsive force of the bent part. Next, a glass wool heat insulating material 9 having a density of 10 kg / m ³ and a thickness of 100 mm was applied to the ceiling of the living room to construct the heat shield structure of the present invention. The heat flow meter 12 was installed on a heat shield sheet on the attic side.

Comparative Example 1
In the structure shown in FIG. 11, an attic structure was constructed in the same manner as in Example 1 without using the heat shield sheet A of the present invention. The heat flow meter 12 was installed on the base plate 5 on the attic side.

Test example 1
In the attic structure of Example 2 and Comparative Example 1 above, the room is kept at 27 ° C. and the relative humidity is 50%, and the temperature under the conditions of Tokyo in the summer from the roof material direction (27 ° C. to 34 ° C., average 30. (06 ° C.) and the amount of solar radiation were allowed to stand for 24 hours, and the temperature of the center portion of the attic space and the heat flow rate to the attic were measured by the installed heat flow meter 12. The temperature change of the attic space over time is shown in FIG. As shown in FIG. 12, the attic structure of Example 2 was lower by about 9.7 ° C. in the hottest time zone than the attic structure of Comparative Example 1, and the attic structure of the present invention was excellent. It showed a heat shielding effect. Moreover, transition of the heat flow for every time in an attic is shown in FIG. As shown in FIG. 13, in the case of the attic structure of Example 2, it can be seen that the amount of heat entering the attic can be reduced by about 70% compared to the case of Comparative Example 1, and the heat shielding sheet and the heat shielding structure of the present invention can be reduced. The excellent heat shielding effect was confirmed.

  According to the present invention as described above, it is possible to provide a heat shield sheet that is inexpensive and has excellent heat shield properties, handling properties, workability, and dew condensation prevention properties, and a heat shield structure for an attic using the heat shield sheet. it can.

The perspective view explaining the thermal insulation sheet of the present invention. The figure explaining use of the thermal insulation sheet of this invention. The figure explaining the heat insulation structure of this invention. The figure explaining the heat insulation structure of this invention. The figure explaining the relationship between a rafter, a girder, and a field board. The figure explaining the relationship between rafters, joists and field boards. The figure explaining the usage method of the thermal insulation sheet of this invention. The figure explaining the usage method of the thermal insulation sheet of this invention. The figure explaining another embodiment of the heat shield sheet of this invention. The figure explaining the usage method of the thermal insulation sheet | seat of FIG. The figure explaining the heat insulation structure of this invention. The figure explaining the thermal-insulation effect of the thermal-insulation sheet | seat and attic structure of this invention. The figure explaining the thermal-insulation effect of the thermal-insulation sheet | seat and attic structure of this invention.

Explanation of symbols

A: Heat shield sheet 1: Upper paperboard 2: Lower paperboard 3: Corrugated paperboard 4: Reflective layer 5: Field board 6: Rafter 7: Space 8: Bending piece 9: Insulating material 10: Purlin 11: Roofing material 12: Heat flow Total 13, 14: Space formed by field plate of rafter and girder 15: Cut auxiliary line 16: Cut line 17: Girder (or head connection)
18: Ceiling joist 19: Notch 20: Prismatic bent part 21: Sumiki

Claims (12)

  In a rectangular heat shield sheet in which a reflective layer made of an aluminum foil or an aluminum vapor-deposited resin film is bonded to at least one surface of corrugated paper having a corrugated paper sandwiched between an upper paperboard and a lower paperboard, At least one corner of the sheet has at least two fold lines parallel to the longitudinal direction of the sheet that can be folded in a prismatic shape with the corner facing inward, and one cut line perpendicular to the longitudinal direction of the sheet. Each of the above heat shield sheets is provided.   The heat insulating sheet according to claim 1, wherein the reflective layer is an aluminum vapor deposited resin film.   The short side (width) of the heat shield sheet is 100 to 1,000 mm, the long side (length) is 200 to 3,000 mm, and the mountain and valley direction of the corrugated paperboard is the long side direction of the heat shield sheet. The heat-shielding sheet according to claim 1, which is parallel to   The heat insulating sheet according to claim 1, wherein the reflective layer is bonded to both sides of the corrugated cardboard.   The heat shielding sheet according to claim 1, wherein a cut auxiliary line having an angle with respect to an end portion of the heat shielding sheet is provided on the entire surface of the heat shielding sheet.   The heat-insulating sheet according to claim 1, wherein the folding line and the cut line are perforations formed from continuous linear holes.   The heat shield sheet according to claim 5, wherein the cut auxiliary line is a perforation formed from a continuous linear hole.   It is an attic structure consisting of a base plate and a plurality of rafters that support the base plate, and the thermal insulation sheet according to any one of claims 1 to 7 is at least between the plurality of adjacent rafters. A heat insulating structure for an attic characterized in that a space is formed between the reflective layer and the field plate so that one of the reflective layers faces the field plate.   The short side (width) of the heat shield sheet is larger than the interval between the inner side surfaces of the adjacent rafters, and both end portions of the heat shield sheet are bent at a substantially right angle with respect to the horizontal plane of the heat shield sheet. The heat-insulating structure according to claim 8, wherein the heat-insulating sheet is held between the sides of the adjacent rafters by causing a piece to abut the side surfaces of the adjacent rafters and the bending repulsive force of the folded heat-insulating sheet.   The heat-insulating structure according to claim 8, wherein the bent piece of the heat-shielding sheet is brought into contact with the side surface of the adjacent rafter, and the heat-shielding sheet is fixed between the side surfaces of the adjacent rafters by the fixing member through the bent piece.   The space formed by the base plate and the rafter has a member for fixing the rafter, and the corner portion of the heat shield sheet corresponding to the member is folded inward along the folding line. The described heat shield structure. Furthermore, the heat insulation structure of any one of Claims 9-11 in which the heat insulating material is arrange | positioned at the room inner side of the heat insulation sheet.

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