초록 ▼

The heat insulator includes a lower sheet (14) that is larger is both length and width than the upper sheet (12) so that the heat insulator can span over objects such as purlins, rafters and obstructions in a roof structure while maintaining the air gap (20) between the sheets. The air gap protects

The heat insulator includes a lower sheet (14) that is larger is both length and width than the upper sheet (12) so that the heat insulator can span over objects such as purlins, rafters and obstructions in a roof structure while maintaining the air gap (20) between the sheets. The air gap protects the reflectivity of the inner surfaces of the sheets, thereby preserving the ability of the sheets to reflect radiant heat. The larger, lower sheet can be formed in a single catenaries from edge to edge of the sheet, or in a multiple array of catenaries to form parallel, tubular air gaps (26), if desired. The heat insulator can be mounted to fibrous insulation (22) or to other more rigid structures, if desired, when placed in a roof structure.

대표청구항 ▼

1. A heat insulator for a roof structure comprising:an elongated first sheet having a predetermined length, opposed side edges, a predetermined width between said opposed side edges, and an intermediate portion between said side edges, an elongated flexible second sheet having a length greater than

1. A heat insulator for a roof structure comprising:an elongated first sheet having a predetermined length, opposed side edges, a predetermined width between said opposed side edges, and an intermediate portion between said side edges, an elongated flexible second sheet having a length greater than said predetermined length of said first sheet, side edges, a width between its said side edges greater than said predetermined width of said first sheet, and an intermediate portion between said side edges, said second sheet positioned in superposed relationship with respect to said first sheet and with the lengths of said sheets parallel and the length of said second sheet extended to the same length of said first sheet, and said oppossed side edges of said second sheet aligned with and connected to said opposed side edges of said first sheet, whereby said heat insulator can be stored in a reel with the second sheet collapsed against the first sheet, and when said heat insulator is unreeled, the second sheet is positioned below said first sheet and said sheets are suspended by their opposed side edges with said first sheet not folded, gravity tends to move said intermediate portion of said second sheet away from said intermediate portion of said first sheet to form an air space between said intermediate portions of said sheets, and said second sheet has enough additional length with respect to said first sheet to form folds across its length about structures in the roof, and at least one of said first or second sheets bearing a heat reflective surface facing the other of said first or second sheets. 2. The heat insulator of claim 1, whereinsaid heat reflective surface is formed of metal. 3. The heat insulator of claim 1, whereinsaid heat insulator is formed in a spiral roll with said second sheet formed with longitudinally extending folds and laterally extending folds and said intermediate portions of said sheets in abutment with each other and the air space collapsed. 4. The heat insulator of claim 1, wherein said opposed side edges of said second sheet are shined.5. The heat insulator of claim 1, wherein said second sheet is formed in corrugations extending along the length of said second sheet having apexes facing said first sheet and adhering to said first sheet, forming air gaps extending between said first and second sheets.6. The heat insulator of claim 1 wherein said first sheet is formed of a material selected from the group of materials consisting essentially of one of fiberglass, mineral wool and cellulose.7. The heat insulator of claim 1 wherein said first sheet is formed of a material selected from the group of materials consisting essentially of one of white vinyl, polyvinyl chloride, polyethylene, and polypropylene.8. A heat insulator for a roof structure including parallel rafters and parallel purlins extending normal to and supported by said rafters, the heat insulator comprising:elongated first and second sheets for positioning adjacent the rafters, each of said first and second sheets having a length dimension, a width dimension, and opposed parallel side edges, and an intermediate portion between its side edges, said first and second sheets arranged with their length dimensions parallel and connected together at their respective side edges in superposed relationship, said second sheet being longer and wider than said first sheet but extended to the same length and width of said first sheet, whereby when said first sheet is stretched substantially flat over said second sheet, said intermediate portion of said second sheet is urged away from said intermediate portion of said first sheet by gravity and forms an air space between said sheets, and when said heat insulator is extended across the lengths of said rafters said second sheet becomes folded about said rafters, and said first and second sheets form air spaces between said rafters, and when said heat insulator is formed in a reel, said heat insulator is deflated with said second sheet collapsed against said first sheet. 9. The roof structure of claim 8, wherein at least one surface of at least one of said first and second sheets bearing a heat reflective surface that faces the other sheet.10. The roof structure of claim 9, wherein said first sheet is more rigid than said second sheet and is formed of a heat insulation material selected from the group consisting essentially of fiberglass, gypsum board, and mineral wool.11. A heat insulator for a roof structure comprising:a first elongated flexible sheet having opposed parallel side edges and formed in a given length, a second elongated flexible sheet having opposed parallel side edges and being of greater length and width than said first elongated flexible sheet and extended to the same length of the first elongated flexible sheet, said first and second elongated flexible sheets attached to each other at their respective opposed side edges so that when said first elongated flexible sheet is extended in a flat configuration with said second elongated flexible sheet positioned below said first elongated flexible sheet said second elongated flexible sheet tends to sag under the influence of gravity with respect to said first elongated flexible sheet to form a space between said first and second elongated flexible sheets, at least one of said first and second elongated flexible sheets having a radiant heat reflective surface facing the other of said first and second elongated flexible sheets, whereby said heat insulator can be stored in a reel, and when the heat insulator is unreeled and extended across a series of laterally extending spaced structural supports, with said second elongated flexible sheet positioned below said first elongated flexible sheet, said second elongated flexible sheet is supported in contact with said first elongated flexible sheet by the structural supports and tends to sag under the influence of gravity beneath said first elongated flexible sheet at intervals between said structural supports and forms substantially closed air spaces between the spaced structural supports. 12. A heat insulator for installation in a building structure comprising:a first elongated sheet and a second elongated sheet, the lengths of said first and second sheets extending parallel to each other and having edges connected together, one of said sheets having a radiant heat reflective surface facing the other of said sheets, said second sheet being greater in width than said first sheet and greater in length than said first sheet for a given length of said first sheet but extended to the same length of said first sheet so that said second sheet tends to sag below said first sheet when said first sheet is placed in a flat configuration above said second sheet, said heat insulator sheet material rolled into a reel with said second sheet having wrinkles formed therein.