JPH0633678B2 - Sound insulation dry type floating floor structure - Google Patents

Description

The present invention relates to a sound-insulating dry floating floor structure. More specifically, it is intended to provide a dry floating floor structure capable of preventing vibration and noise generated in the upper floor from propagating downstairs in a multi-storey building.

[Conventional technology]

In multi-storey buildings, vibrations and noise generated on the upper floors are
There is a strong demand for improvement and prevention in the field of construction technology because it propagates downstairs and gives unbearable discomfort to people.

Generally, the vibration and noise propagating from the upper floor through the floor is JIS-
As described in A-1418, they are roughly classified into lightweight impact sound and heavy impact sound, and the methods for preventing the propagation of these impact sounds are basically different. (“Standards for sound insulation performance of buildings and design guidelines” (Academic Society of Japan)) That is, since the lightweight impact sound generated by a hard impact body represented by a shoe sound or a falling sound of an object is in a high frequency region, High-frequency absorption capacity is required for the floor structure, and it is generally considered effective to use a soft floor finish material such as carpet or foamed vinyl chloride sheet. In addition, the heavy impact sound generated by a soft impact body, which is represented by the sound of children jumping or walking with bare feet, is in the low-frequency region, and the floor structure is required to have a low-frequency absorption capacity. Only the method of increasing the mass of is effective.

Thus, the heavy impact sound and the lightweight impact sound have the property of conflicting, the correspondence is also different, as a floor construction technology that can simultaneously prevent the propagation of the impact sound having this conflicting property, A warm floating structure has been proposed.

However, the hot floating floor structure has not been put into practical use because it is difficult to construct, it takes a long construction period, and the construction cost is also high.In the current situation, the mass of the floor base, for example, a concrete slab is increased ( For example, from thickness of 120m / m
Improves heavy impact sound and lays a dry floating floor structure on the slab for the purpose of improving habitability, making it a dry floating floor structure, and further finishing the floor with carpet etc., improving light impact sound The method of doing is generally adopted.

In addition, the dry floating floor means a support member (such as Daihiki, joists, stanchions) for installing the floating floor on the floor base, a floor base material laid on the support member, and a floor base material for fixing the floor base material. It consists of discarding.

[Problems to be solved by the invention]

Conventionally, in the dry floating floor structure, the vibration generated by impact is
It is said that it has almost no sound insulation performance because it is transmitted to the supporting member and the contacting peripheral portion without being absorbed and attenuated by the floor base material, and is propagated to the lower floor through the skeleton to generate an impact sound. However, since it has the excellent function of improving the firmness and chilliness of the floor base, improving walking safety and heat insulation, and providing a comfortable living space, in recent years it prevents the transmission of impact sound to the dry floating floor itself. Many attempts have been made to add functionality.

For example, as the support member, a wooden support part or a metal support, which is conventionally assembled with Daihiki or joist, has been used. However, a plastic support such as a nylon support having a shock absorbing ability (Japanese Utility Model Publication No. 57-32190). ) Or a metal strut equipped with a rubber elastic body (Japanese Utility Model Publication No. 54-3542) or a method of using a high density substance such as lead for a supporting member (Japanese Patent Publication No. 59-76351).
Have been proposed. Alternatively, as the floor base material, a panel in which lead, a hard urethane resin foam, or the like is sandwiched with plywood or the like instead of a conventional plywood or particle board (JP-A-59-76351 and JP-B-57-7713) ) Has been proposed. However, all of these attempts have been related to conventional concrete slabs (thickness
At 120 m / m), the Architectural Institute of Japan has not achieved the sound insulation class L-55 for heavy impact sound and the sound insulation class L-50 for light impact sound, which is the applicable grade 2 (permissible).

The present invention has been made in view of such a current situation, and its purpose is to increase the mass of the floor base without using a soft floor finishing material such as carpet, The purpose of the present invention is to develop a floor base material that can simultaneously prevent the propagation of light-weight impact sound and heavy-weight impact sound, thereby providing a sound-insulating dry floating floor structure that has a comfortable living space and is easy to construct.

[Means for solving problems]

The present inventors have conducted earnest research to develop a floor base material having a function capable of instantaneously absorbing and attenuating the impact force applied to the floor by the above-mentioned weight and lightweight impact bodies, and as a result, as a core material for sandwich panels. , A structure in which a large number of constituent materials are integrally molded without using a binder so that the constituent materials can vibrate and shift without being constrained to each other when an impact force is applied to the floor. If used,
It has been found that the impact force can be significantly attenuated to prevent the propagation of impact sound, and the present invention has been completed based on the findings.

That is, first, the present invention relates to a dry floating floor structure constructed on an upper floor base of a multi-storey building, in which a floor base material is provided via a supporting member so as to form an underfloor space on the upper floor base. Laying and installing a siding board on the floor base material, and
The floor base material is a fibrous, string-shaped or strip-shaped flexible material,
And a sheet-like, net-like or bulky processed flexible material obtained by processing a fibrous or string-like flexible material, and an integrated body obtained by appropriately combining one or more materials selected from the above A laminated structure in which face materials are fixed to upper and lower surfaces of a core material integrally formed by binding with a restraint means such as suturing, fixing metal fittings or a package, or an integrated structure of the laminated structure. A sound-insulating dry type floating floor structure characterized by being present, and secondly, in a dry type floating floor structure constructed on an upper floor base of a multi-storey building, a supporting member is provided so as to form an underfloor space on the upper floor base. A floor base material is laid through the floor base material, and a partition plate is installed on the floor base material, and the floor base material is a fibrous, string-shaped or strip-shaped flexible material, and a fibrous or Sheet-like, net-like and bulky processing made from a string-like flexible material is possible. A layered body in which one or more kinds of materials selected from the following are appropriately combined and stacked in layers, and the face materials arranged on the upper and lower surfaces thereof are tightly bound and integrated by a restraining means such as a suture or a fixing metal fitting. The present invention provides a sound-insulating dry type floating floor structure characterized by being a laminated structure formed by the above, or an integrated structure of the laminated structure. Further, in these sound-insulating dry type floating floor structures, various materials of floor base materials are layered. The integrated body formed by stacking can be configured by interposing a face material also in the middle of the integrated body.

In the present invention, a fibrous flexible material (hereinafter referred to as “fibrous material”) or a string-shaped flexible material (hereinafter referred to as “string-shaped material”) which is a constituent material of the core material is a solid (empty), It may be either hollow or porous (foamed), and as the fibrous material, all fibers such as animal and vegetable fibers, synthetic fibers, regenerated fibers, inorganic fibers and metal fibers, specifically,
Wool, silk, cotton, hemp, pulp, linter, rayon, bemberg, acetate, rayon staple, polyethylene fiber, polypropylene fiber, nylon fiber, vinylon fiber, acrylic fiber, polyester fiber, phenol fiber, mineral fiber, asbestos fiber, glass Examples include fibers, carbon fibers, stainless fibers, copper fibers, aluminum fibers and the like. Further, as the string-like material, so-called threads, strings, ropes, ropes, etc. obtained by processing these fibers (in the present invention, these are simply referred to as "string-like" for simplicity). In addition to these, string-like materials similar to these, for example, string-like plastic foam made of polystyrene, polyethylene, etc., rice or wheat straw, other naturally occurring stems, twigs, etc., Examples include bamboo straws, those obtained by processing natural products such as wooden straws, straws, plastic processed strings such as polypropylene tape for packing, and rubber strings. The cross-sectional shape of the cord-shaped material is not particularly limited, and may be circular, flat, or the like.

Examples of the sheet-shaped processed material or bulky processed material obtained by processing a fibrous or string-shaped material include woven cloth, non-woven cloth, felt, and paper.
This sheet-shaped or bulky processed material is simply a braided or assembled piece of fibrous or string-like material that is not bound to each other by a binder or a heat-sealing method, or is bound to the minimum necessary amount. The one having a large sound insulation effect is preferable. However, even in the case of sheet-like or bulky processed materials in which fibrous or string-like materials are bound by a binder or heat fusion method, the core material braided or assembled alone or in combination with other materials is It has an effect and is included in the sheet-shaped or bulky processed material of the present invention.

The reticulated flexible material (hereinafter referred to as "reticulated material") is not only a net obtained by processing from fibrous or string-like materials, but also integrally molded like reticulated plastic foam made of polyethylene, polystyrene, etc. Also included are reticulated materials. The net-like material not only has a structure in which the cord-like material constituting the net-like material is apt to cause vibration and displacement, but also has an action of introducing air into the core material, and thus also in this sense, the sound insulation effect is enhanced.

The strip-shaped flexible material (hereinafter referred to as "strip-shaped material") has a different form from a fibrous or string-shaped material, a sheet-shaped or bulky processed material based on these, or a net-shaped material, but a component of the core material. When used as, since it is in the form of a strip, it produces vibration and displacement when it receives an impact, and therefore exhibits sound insulation performance equivalent to these. As the strip material, for example, fibrous, string-like and net-like materials or fiber scraps obtained from sheet-like and bulky processed material, string scraps, straw scraps, net strips, woven strips, non-woven strips, In addition to felt waste, wood waste and other chips, bamboo bark, bark, and the like.

In the floor base material of the present invention, an aggregate (also referred to as a core material precursor) in which the same kind or different kinds of the constituent materials as described above are accumulated in layers
Then, the integrated body is tightly bound and integrated by a restraint means selected from sutures, fixing metal fittings, or a package, to form a core material. This core material can be fixed to the top and bottom face materials as a floor base material, but the core material and the top and bottom face materials can be sewn or fixed together without binding the core material alone. It is also possible to directly create the floor base material by binding tightly with the restraint means of the metal fittings. Further, in these cases, when the constituent materials are accumulated in layers as described above to form the core material precursor, the core material has a layered body in which a face material is interposed between the constituent materials to be accumulated in layers. It can also be a precursor.

Examples of the mode of accumulating these constituent materials in layers include, for example, intertwining the fibrous or string-like materials irregularly, or the fibrous or string-like materials as they are or bundling them in a vertical and horizontal direction according to a certain regularity. Alternatively, sheet-like or bulky processed material or net-like material, which is a processed product of fibrous or string-like material, may be laminated, or these may be combined. In addition, when using strip-shaped materials such as cloth strips, straw chips, and wood chips that cannot be accumulated in this way, felt,
It may be interposed between a non-woven fabric, a woven fabric, a net or the like, or may be packaged with various films, a woven fabric, a non-woven fabric, a net or the like. Alternatively, even for the materials that can be accumulated as described above, a certain amount of material is
Of course, they may be used by bundling, suturing, or packaging. Furthermore, in these cases, when interposing a face material, the face material may be inserted and accumulated during such accumulation.

Next, the core material precursor thus accumulated is sewn alone or together with a face material (a face material interposed between the core material precursors or face materials arranged above and below the core material precursor), screws, and bolts. Tighten with fixing metal fittings such as nuts, screws, nails, or package with various films, woven fabrics, non-woven fabrics, etc. to integrate. However, when packaging the entire floor base material in which the core material is sandwiched between the upper and lower surface materials, it can be used by fixing it with a stretch board, but this is not practical.

Further, the present invention is characterized in that the constituent material of the core material can be vibrated or displaced by an impact force. However, as long as the characteristics are not impaired, the constituent materials of the core material are separated from each other. The shape may be retained by heat fusion or adhesion.

Thus, the core material is subjected to an integrated treatment with the precursor alone or with the face material.At this time, the core material is 0.1 to 0.8 g / cm ² so as not to cause load deformation such as harmful sinking as a floor material.
Compression molding to a density of. Further, in order to obtain the sound insulation performance more effectively, the thickness of the core material is preferably at least 5 mm or more.

The face material according to the present invention is used for holding strength and durability as a floor base material and for joining support members, and is, for example, a wood-based material such as plywood, particle board, hard board, etc. Boards, asbestos cement board, wood wool cement board, fiber cement board such as pulp cement board, stone bone board board, rock wool board, asbestos calcium silicate board, inorganic board such as foam concrete board, polystyrene foam , Polyurethane foam, vinyl chloride foam, polyethylene foam, phenol foam, etc., foamed resin plates, acrylic resin plate, polycarbonate plate, polyester resin plate, rigid vinyl chloride plate, polyethylene plate, polypropylene plate, etc., synthetic resin plates, glass Fiber reinforced boards, cloth laminated boards, paper laminated boards, FRP boards, etc. Mi plate, iron plate, metal plate such as stainless steel plate or the like and, organic, or the like inorganic honeycomb plate and the like is not limited to these, are appropriately selected and used.

The method of joining the core material and the face material (particularly the top and bottom surface materials) in the present invention may be a method of bonding using an appropriate adhesive or the like, or the face material after sandwiching the core material between the face materials as described above. Examples include a method of stitching the spaces, a method of tightening with screws, bolts, nuts, screws, nails, etc., a method of heat-sealing, and the like. In addition, one or both sides of the face material holding the core material may be composed of two or more same or different combination face materials.

The laminated body composed of the face material and the core material thus prepared is used as it is, or as a multilayer structure in which the same kind or different kinds are further accumulated as appropriate, and is used as the floor base material of the dry floating floor according to the present invention. When further stacking the laminated body in which the core material is sandwiched between the face materials, some of such laminated bodies may be simply laminated, or the face material may be interposed between the core material and the core material. Alternatively, they may be laminated and integrally molded. As the surface material used in this case, for example, a lightweight surface material such as plywood or a foamed resin plate is preferably selected from the viewpoint of the lightness of the floor base material.

The method of constructing a dry floating floor can basically follow the conventional method, in which a floor base material is laid in a floating floor type on a floor base such as a concrete slab via a supporting member, and then it is abandoned. To do. Floor base material configured by using a special core material according to the present invention, when laid on the floor base via the support member, when an impact force is applied to the floor, it causes bending,
Along with that, vibration and displacement are generated in the constituent elements of the core material, and the impact force is absorbed and attenuated.

[Action]

The mechanism for preventing the propagation of impact sound in the dry floating floor structure according to the present invention is not always clear, but a large impact body added with a soft impact body on the surface of the floor base material laid via the supporting member on the floor base. The impact force with impact energy is
Much of the applied impact energy is converted to thermal energy due to the displacement between the constituent materials of the core material due to the slight bending of the floor base material and mutual friction, so the heavy impact sound propagated downstairs It is presumed that it will be significantly attenuated.

On the other hand, an impact force having a small impact energy applied by a hard impact body directly causes minute vibration friction between the materials forming the core material, whereby most of the impact energy is converted into thermal energy and consumed. It is speculated that the lightweight impact sound propagating downstairs is significantly attenuated.

The constituent material of the core material in the present invention is a fibrous or string-like material, a mesh material of the same element, a sheet-like or bulky material obtained from them, or a strip-like material. Therefore, it has a characteristic that vibration and displacement are likely to occur due to the impact force applied to the floor. Even sheet-like or bulky processed materials are not simply sheet-like or bulky materials, but are obtained from fibrous or string-like materials, and therefore have many properties suitable for vibration and displacement of the string-like materials. There is something.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

Floor base material production example 1 Nylon fibers are juxtaposed to have a thickness of about 5 mm on kraft paper (first layer), and a thickness of 5 mm is laminated in a direction perpendicular to the nylon fibers to form a second layer. After repeating this operation in sequence and stacking 9 layers to form a core material precursor with kraft paper laid on the uppermost layer,
This is woven with polyester tatami and sewn so that the area between the warp and weft is 8 cm ² , and the thickness is 20 mm. Length 1800 m / m × width 900
A core material of m / m × thickness 20 m / m (density 0.4 g / cm ³ ) was prepared. Next, the core material and the front and back materials (16 m / m plywood) were adhered with an epoxy adhesive to manufacture a sandwich panel, which was used as a floor base material (1).

Floor base material production example 2 20 pieces (core material precursor), thickness 20m, which is obtained by cutting polypropylene fiber woven fabric packaging bag material into a length of 1800 m / m x width of 900 m / m on a 2.5 mm plywood surface material. / m Styrene foam (face material), 20 sheets of this cutting fabric (core material precursor), and 2.5 m / m plywood face material are laminated in that order, and then stitched using polyester tatami thread to form a length of 1800 m / A sandwich panel having a multilayer structure of m × width 900 m / m × thickness 40 m / m (core material density 0.45 g / cm ³ ) was produced. Further, 9 m / m plywood was joined to the front and back surfaces of the panel with wood screws to obtain a floor base material (2).

Floor base material production example 3 Felt having a thickness of 15 mm made from unwound monofilament without binder on 10 sheets of glass non-woven fabric (thickness 1 mm), and further 10 sheets of the non-woven fabric were sequentially laminated, and then 200 m
1800 m / m long × 900 m / m wide × 20 m thick with screws tightened at m intervals
A core material with m (density 0.53 g / cm ³ ) was prepared. Next, using a 15 mm wood wool cement board for the front and back materials and a 5 mm cloth laminated board for the back material, sandwich the core material, and further tighten the four corners of the surface material with bolts and nuts to form the floor base material (3). Manufactured. The head of the bolt was embedded so that it would not protrude from the surface of the wood wool cement.

Floor base material production example 4 Three layers of rice straw are alternately laminated in the vertical and horizontal directions, and string foam polystyrene is laid on it to a thickness of about 30 m / m, and further three layers of rice straw are laminated in the vertical and horizontal directions. After that, use a polyester tatami thread to set the area between the warp and weft threads to 10 cm ² , and the thickness to 30 mm.
The core material having a length of 1800 m / m, a width of 900 m / m, and a thickness of 30 m / m (a density of 0.35 g / cm ³ ) was prepared by sewing. On the front and back surfaces of this core material, glass non-woven fabric and unsaturated polyester resin are used to make a 5 mm thick FRP by the hand-up method.
Was constructed and a sandwich panel integrated with the core material was produced and used as a floor base material (4).

Floor base material manufacturing example 5 Put glass fiber in a vinyl bag, fully deaeration and sealing, length 1800 m / m x width 900 m / m x thickness 10 m / m (density 0.42 g / c
m ³ ), a core material was prepared, and a sandwich panel in which the core material and the front and back surface materials (15 mm particle board) were bonded with an epoxy adhesive was manufactured, and this was used as a floor base material (5).

Floor base material production example 6 A core material (precursor) obtained by laminating 20 nets made of a string-shaped polyethylene foam (diameter of about 3 m / m) and front and back materials of 21 mm plywood are integrated with wood screw nails. , Length 1800m / m ×
A sandwich panel having a width of 900 m / m and a thickness of 52 m / m (core material density of 0.1 g / cm ³ ) was manufactured and used as a floor base material (6).

Floor base material production example 7 3 pieces of cotton woven cloth, cloth pieces cut into 3 cm square pieces were scattered to a thickness of 20 m / m, and a carpet of 5 mm thickness woven with acrylic fiber was further spread on it. After sequentially stacking, a polyester tatami mat was sewn so that the area between the warp and weft was 8 cm ² , and the length was 1800 m / m × width 900 m / m × thickness 15 m / m (density 0.28
After producing a core material of g / cm ³ ), a sandwich panel was produced in the same manner as in Production Example 1 and used as a floor base material (7).

Floor Substrate Production Example 8 Polypropylene packing straps are knitted into a woven fabric to form a sheet. After 10 sheets are laminated, the sheets are sewn according to the method of Production Example 1 to have a length of 1800 m / m and a width of 900 m / m. × Thickness 40m / m
A sandwich panel having a (core material density of 0.38 g / cm ³ ) was manufactured and used as a floor base material (8).

Floor base material manufacturing example 9 A 3m / mth net woven with polyethylene fiber
The sheets are stacked and sewn according to the method of Production Example 1, length 1800 m / m x width 900 m / m x thickness 15 m / m (core material density 0.22 g / c
A core material of m ³ ) was prepared. The core material and the front and back materials (2 m / m polyethylene plate) were heat-sealed, and a 21 mm plywood was further attached to the surface with a rubber adhesive to obtain a floor base material (9).

Example 1 On a 120 m / m concrete slab in a 6-tatami room in a 3DK house, a rubber elastic body of 40φ × 50 mm (hardness 80
Floor base material having six metal columns having
After laying (1) on the front surface, nailing 9 mm plywood on the base material, discarding it, attaching a skirting board to the peripheral wall part, and cushioning material between the bottom part of the skirting board and the floor surface ( A sound insulation dry type floating floor structure according to the present invention was constructed by inserting a 10 mm thick Soflan tape).

Sound insulation performance is measured according to JIS-A-1418 "Measurement method of floor impact sound level on site", on a constructed floor surface, a bang machine (Satsuki Seisakusho's heavy impact generator), or
Tapping machine (Brel & Kjr lightweight impact generator)
Was installed, and the floor surface was hit to measure the sound pressure level for each 1/1 octave band between 6 tatami mats downstairs.

As a result, the sound insulation class according to the Japan Institute of Architecture is a good one belonging to heavy impact sound L-50, light weight impact sound L-45, and application grade 1 (standard), and the data are shown in Table 1 and Table 2.
Shown in. Note that the sound insulation performance of the structure according to the present invention corresponds to a structure in which a needle punch rubber carpet 7 mm is laid on a concrete slab 200 mm described in “Sound insulation performance standards and design guidelines for buildings” on page 87. there were.

Examples 2 to 9 The sound insulation performance was measured according to Example 1 except that floor base materials (2) to (9) could be used instead of the floor base material (1). The sound insulation grades were heavy impact sound L-50 and light weight impact sound L-45, respectively, as shown in Tables 1 and 2, which were the same results as in Example 1.

Example 10 On the slab in the room used in Example 1, Daihiki was fixed with bolts at 900 mm intervals, and joists were laid on the slab at 700 mm intervals. The floor base material (1) is bonded and laid on it with a double-sided adhesive tape, and a 4 mm natural wood decorative plywood is further bonded onto the base material with a double-sided tape to perform a floor finish that is also used as a waste paste. The sound insulation dry type floating floor structure was constructed.

The sound insulation performance was measured according to Example 1. As a result, the sound insulation grades are heavy impact sound L-55 and light weight impact sound L-.
It was as good as 50. The data are shown in Tables 1 and 2.

Comparative Example 1 The sound insulation performance of the 120 m / m concrete slab itself was measured according to Example 1.

As a result, the sound insulation grades were heavy impact sound L-60 and light weight impact sound L-75. The data are shown in Tables 1 and 2.

Comparative Example 2 Length 1800 m / m × width 900 obtained by self-bonding rigid urethane foam (density 0.04 g / cm ³ ) and 16 mm plywood front and back materials
A dry floating floor structure was constructed in accordance with Example 1 except that a sandwich panel having m / m × thickness of 52 m / m was used as a floor base material, and the sound insulation performance was measured.

As a result, the sound insulation grades were heavy impact sound L-60 and light weight impact sound L-60. The data compared with Example 1 are shown in Tables 1 and 2.

Comparative Example 3 A dry floating floor structure was constructed in accordance with Example 1 except that the floor base material was changed to 21 mm plywood, and the sound insulation performance was measured.

As a result, the sound insulation grades were heavy impact sound L-60 and light weight impact sound L-60. The data are shown in Tables 1 and 2.

Comparative Example 4 Example 10 except that the floor base material was changed to 21 mm plywood.
A dry floating floor structure was constructed according to the above, and the sound insulation performance was measured.

As a result, the sound insulation grades were heavy impact sound L-65 and light weight impact sound L-65. The data are shown in Tables 1 and 2.

[Effect of the invention] According to the present invention, in a dry floating floor structure excellent in comfortability,
The flooring material itself has the effect of effectively absorbing and attenuating both heavy and light impact sounds, thereby preventing these impact sounds from propagating downstairs. Further, as a result, there is provided a sound-insulating dry type floating floor structure which does not require an increase in the mass of the floor base or the use of a flexible floor finishing material such as carpet, and which is inexpensive and easy to construct. However, the present invention is
The use of flexible floor coverings, such as carpet, is not precluded, depending on the preferences of the occupants or to prevent transmission of light impact noise.

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Claims (4)

[Claims] 1. In a dry floating floor structure constructed on an upper floor base of a multi-storey building, a floor base material is laid via a supporting member so as to form an underfloor space on the upper floor base, and the floor is under the floor. A base material is a flexible material in the form of fiber, cord or strip,
And a sheet-like, net-like or bulky processed flexible material obtained by processing a fibrous or string-like flexible material, and an integrated body obtained by appropriately combining one or more materials selected from the above A laminated structure in which face materials are fixed to upper and lower surfaces of a core material integrally formed by binding with a restraint means such as sutures, fixing metal fittings or a package, or an integrated structure of the laminated structure. A sound-insulating dry type floating floor structure characterized by being 2. In a dry floating floor structure constructed on an upper floor base of a multi-story building, a floor base material is laid via a supporting member so as to form an underfloor space on the upper floor base, and the underfloor is constructed. A base material is a flexible material in the form of fiber, cord or strip,
And a sheet-like, net-like, and bulky processed flexible material obtained by processing a fibrous or string-like flexible material, and an aggregate formed by layering the materials by appropriately combining one or more selected from And a face material arranged on the upper and lower surfaces thereof are bound and integrated by a restraint means such as a suture or a fixing metal fitting to form a laminated structure, or an integrated structure of the laminated structure. Sound insulation dry type floating floor structure. 3. In a dry floating floor structure constructed on an upper floor base of a multi-story building, a floor base material is laid via a supporting member so as to form an underfloor space on the upper floor base, and the underfloor is constructed. A base material is a flexible material in the form of fiber, cord or strip,
And a sheet-like, net-like or bulky processed flexible material obtained by processing a fibrous or string-like flexible material, and an integrated body obtained by appropriately combining one or more materials selected from the above A laminated structure in which a face material is fixed to upper and lower surfaces of a core material formed by binding and interposing a face material interposed between the face material and the face material with a restraint means such as a fixing metal fitting or a package, or A sound-insulating dry floating structure characterized by being an integrated structure of laminated structures. 4. In a dry floating floor structure constructed on an upper floor base of a multi-story building, a floor base material is laid via a supporting member so as to form an underfloor space on the upper floor base, and the underfloor is installed. A base material is a flexible material in the form of fiber, cord or strip,
And a sheet-like, net-like or bulky processed flexible material obtained by processing a fibrous or string-like flexible material, and an integrated body obtained by appropriately combining one or more materials selected from the above And a face material interposed between the face material and the face material disposed on the upper and lower surfaces of the aggregate, which are tightly bound and integrated with each other by a restraining means such as a suture or a fixture, or the laminated structure. A sound-insulating dry floating floor structure characterized by an integrated body structure.