BACKGROUND OF THE INVENTION
A cellulous fiber defined in Japanese Industrial Standards (JIS) A-9523 is a fluff-like material obtained by cracking a raw material, such as used newspapers or corrugated boards, and then processing the cracked material through a fibrillator. The cellulous fibers have excellent heat-insulation and sound-absorption properties because of millions of air chambers in each fiber itself and air contained between intertangled fibers. For the purpose of using as a building material, there has heretofore been known a dry blowing method in which the cellulous fibers are blown directly onto the inner surface of the roof or the wall surface of a building to form a deposit of the cellulous fibers. However, the cellulous fiber deposit formed through the dry blowing method is be undesirably involved in a so-called settling-down phenomenon in which the top of the deposit will settle down with time, and the height of the deposit can be eventually reduced by about 15 to 20 % of its initial height. In particular, if cellulous fibers are deposited on a vertical wall surface through the dry blowing method, the settling-down becomes obvious to cause a gap between the top of the deposit and the building structure initially in contact with the deposit, resulting in significantly deteriorated heat-insulation, anti-condensation and sound-insulation performances. Further, existing celluros fibers can be actually handled only by specialized agencies, because the celluros fibers are formed in a sort of fluffs and thereby it is inconveniently required to surround the work environment with an anti-scattering cover such as a plastic sheet during the blowing operation of cellulous fibers on a vertical surface of a wall or the like.


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SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a heat-insurating structure using a fluff-like heat-insulating material such as cellulous fibers, capable of preventing the settling-down phenomenon and allowing everyone to conveniently handle and install even onto a vertical surface without any difficulty. In order to the above object, according to the present invention, there is provided a heat-insulating structure comprising a fluff-like heat-insulating material such as cellulous fibers, and a plurality of strap-shaped partition members partitioning the heat-insulating material into an array of heat-insulating segments. The present invention also provides a discrete heat-insulating panel comprising a surface member such as a facing member arranged to cover or be attached to at least the exposed surface, such as front and back surfaces and upper and lower sides, of the above heat-insulating structure or the interleaved structure of the partition members and the heat-insulating segments filled with the heat-insulating material. In a specific embodiment, a heat-insulating structure of the present invention may be constructed as following, (1) A plurality of strap-shaped partition members are arranged substantially in parallel with each other to define an array of heat-insulating segments therebetween. Then, a fluff-like heat-insulating material such as cellulous fibers is filled in each of the heat-insulating segments, or (2) A surface member is attached to the exposed surface, such as the front and back surfaces and the upper and lower sides, of the above structure or the interleaved structure of the partition members and the heat-insulating segments filled with the heat-insulating material to provide a discrete heat-insulating panel having any dimensions. For example, the above heat-insulating structure is placed between inner and outer walls of a building without any space therebetween. The heat-insulating structure may be used in the form of a plurality of divided pieces according to need. In a preferred embodiment, each of the strap-shaped partition members may have any suitable thickness, and may be made of, but not limited to, a paper-based material. The surface member may be a facing member as well as an underlying or lathing member. Further, in the heat-insulating panel using cellulous fibers as the fluff-like heating material, the strap-shaped partition members and the surface member may be formed of a reusable or recyclable paper-based material, and the surface member may be attached to the exposed surface with water-soluble paste. In this case, the entire heat-insulating panel can be reused or recycled because the cellulous fibers are also reused or recycled. The fluff-like heat-insulating material is not limited to cellulous fibers, and any other suitable fluff-like heat-insulating material may be used as a substitute for or in combination with cellulous fibers. Further, each of the strap-shaped partition members may be composed of at least two strap-shaped members superimposed on each other.

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Last Update 2013/10/30