JP4464015B2 - Sound insulation floor structure and construction method - Google Patents

Description

【００５１】
大引き根太構造では、床仕上げ材４から発生した衝撃音が根太３１や土台３６を介して階下へ直接伝わるため、床基板１（床スラブ）の厚さが１１０mmの場合の遮音性能は重量床衝撃音でＬ−８０、軽量床衝撃音でＬ−７０であった。
【００５２】
これに対し、本発明例のものでは、床基板１の厚さが１１０mmの場合の遮音性能は重量床衝撃音でＬ−７５、軽量床衝撃音でＬ−４５と、大引き根太構造に対して、重量床衝撃音では１ランク、軽量床衝撃音では大幅（５ランク）に遮音性能が向上していることが判る。
【００５３】
【発明の効果】
以上説明したように、請求項１の発明では、弾性体からなる台座及び表面床支持部材を軸材により連結してなる支持脚により表面床を表面床支持部材に当接させて床基板上に支持し、この表面床と床基板との間に緩衝板を表面床及び床基板の間の空間が第１及び第２空間部が区画形成されるように配置し、この緩衝板に、支持脚が挿入される孔部を該孔部と支持脚の軸材との間に第１及び第２空間部を連通する間隙が生じるように設けた。また、請求項２の発明では、緩衝板に第１及び第２空間部を連通する複数の孔部を設け、これら複数の孔部の一部を支持脚が挿入されるものとした。これらの発明によれば、大引き根太構造のように既存敷居の上部を切り落としてレベル調整をせずとも済み、施工の容易化を図ることができる。また、新たな配管配線は緩衝板上に載置でき、作業時間や手間の減少、メンテナンスの容易化を図ることができる。さらに、床構造を改修する場合、既存の部材を緩衝材として利用して、改修時の廃材量の削減、施工時間の短縮、解体費の減少や現場騒音の低下を図ることができる。また、表面床から発生した衝撃音が床基板に直接伝搬するのを支持脚によって防いで、遮音性能を大引き根太構造に対し大幅に向上させることができる。さらにまた、床仕上げ面からの加振による支持脚の変位によって床下地材に瞬間的に生じたたわみ現象による初期の圧縮打撃が緩衝板を加振するので、床基板への圧縮打撃が大きく緩和される上、空間部での横方向への空気の流動が発生し、より分散された形でのエアロダンパー機能が発揮され、重量及び軽量床衝撃音の遮断性能がさらに向上する。
【００５４】
請求項３の発明によると、第１空間部に吸音材を設けたことにより、表面床からの加振によって発生する初期の圧縮打撃を吸音材で緩和して、遮音性能、特に軽量床衝撃音の遮音性能を向上させることができる。
【００５５】
請求項４の発明によると、既存の床仕上げ材及び／又は床下地材に複数の孔部を形成し、これら複数の孔部の一部に、弾性体からなる台座と表面床支持部材とを軸材で連結してなる支持脚を床仕上げ材及び／又は床下地材に接触せずに孔部と支持脚の軸材との間に床仕上げ材及び／又は床下地材の上下両側の空間部を連通する間隙が生じるように挿入して、支持脚を床基板上に台座が床基板上面に載置されるように設置し、その支持脚の表面床支持部材上に表面床を表面床支持部材が表面床下面に当接するように設けることにより、中古住宅の床構造を改修する場合に、既存の部材を緩衝材として利用して、廃材量の削減、施工時間の短縮、解体費の減少や現場騒音の低下といった、環境に配慮した構法で改修することができる。
【図面の簡単な説明】
【図１】 本発明の実施形態１に係る遮音床構造を示す断面図である。
【図２】 実施形態２に係る遮音床構造を示す図１相当図である。
【図３】 実施形態３に係る遮音床構造を分解して示す斜視図である。
【図４】 実施形態４に係る遮音床構造を示す図３相当図である。
【図５】 実施形態５において中古住宅の床構造を遮音床構造に改修するときの工程の前部を示す斜視図である。
【図６】 工程の中間部を示す図５相当図である。
【図７】 工程の後部を示す図５相当図である。
【図８】 実施形態５において遮音床構造に改修する前の中古住宅の床構造を示す断面図である。
【図９】 改修後の遮音床構造を示す図８相当図である。
【図１０】 改修のための大引き根太構造を示す図８相当図である。
【図１１】 遮音床構造の遮音性能を示す図である。
【図１２】 大引き根太構造の遮音性能を示す図である。
【符号の説明】
１ 床基板
２ 表面床
３ 床下地材
４ 床仕上げ板
１０ 支持脚
１１ 軸材
１２ 台座
１３ 表面床支持部材
１８ 緩衝板
１９ 第１空間部
２０ 第２空間部
２３ 支持脚挿入用孔部
２４ 配管・配線
２５ 連通用孔部
２７ 吸音材
３２ 既存床仕上げ材
３３ 荒床（既存床下地材）[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to a technical field related to a sound insulation floor structure applied to an apartment house such as an apartment or a condominium, a building, a detached house, or the like, and a construction method thereof.
[0002]
[Prior art]
Conventionally, when refurbishing a Western-style room into a new Western-style room or a Japanese-style room into a new Japanese-style room in an existing apartment house such as an apartment or condominium, a building or a detached house, a new one is added to the upper surface of the existing floor finish. It is common practice to apply a floor covering (flooring, carpet, tatami, etc.) and install a new thin sill on an existing sill.
[0003]
When refurbishing from a Japanese-style room to a Western-style room, after removing the tatami mat as the existing floor finishing material, place the foamed plastic floor base material on the upper surface of the existing rough floor. After the auxiliary member is fixed to the surface, a new floor finish material is pasted on the foamed plastic floor base material and the upper surface of the auxiliary member. In addition, when refurbishing all the spaces between the Japanese-style rooms or Western-style rooms, the large joist structure is used to adjust the level by cutting off the existing upper part of the sill between the Japanese-style rooms or Western-style rooms. In addition, if new wiring work is required for electricity, gas, water, etc., the existing floor finish material will be removed and electrical wiring, gas pipes, water supply pipes, etc. will be installed on the floor board, and then existing The restoration work of the floor finish material is performed, and the floor finish material is newly constructed (see FIG. 10).
[0004]
In addition, in the case of a sound insulation structure that reduces the propagation of sound from the upper floor to the lower floor, after removing the existing floor finishing material and floor base material (rough floor in the case of a Japanese-style room), on the floor substrate made of concrete, etc. A plurality of support legs consisting of a rubber pedestal, a shaft member and a support plate are placed and fixed on the floor, and a floor panel is installed on the support plate of the support leg, and a damping material and a sound insulation material are placed on the floor panel. After laying a sound-insulating base material made of, a floor base material made of discarded plywood, etc., floor finishing materials such as flooring, carpets, and tatami are newly attached to form a floor (double floor) structure.
[0005]
A rubber pedestal for supporting legs used for such a floor structure is generally used for the purpose of vibration proofing and soundproofing, and there is a shape in which a hollow portion is provided on a truncated pedestal pedestal.
[0006]
[Problems to be solved by the invention]
However, the large pull joist structure that uses existing floor finishing materials and floor base materials leads to a reduction in the amount of scrap materials and dismantling costs, but used houses often have different levels of floors in Japanese and Western rooms, When all the Japanese-style rooms or Western-style rooms are western-style rooms, the level must be adjusted by cutting off the upper part of the existing sill between the Japanese-style rooms or the Western-style rooms, which makes the construction troublesome.
[0007]
In addition, when new piping and wiring work is required, part of the existing floor finishing material is removed and electrical wiring, gas pipes, water supply pipes, etc. are installed on the floor board. In addition, it takes time and labor to work on wiring and wiring, and labor is also required for maintenance.
[0008]
In addition, many existing used houses have a thin floor board (110mm), and if the Oiki jota construction method is used for this used house, the sound generated on the upper floor directly propagates downstairs, so the sound insulation performance of the floor is high. Very low.
[0009]
In addition, the floor (double floor) structure improves the sound insulation performance of the upper and lower floors, but after removing the existing floor finish and floor base material, a new support leg, floor panel, soundproof base material, discarded plywood This construction method uses almost no existing materials, such as laying floor base materials made of materials and sticking floor finish materials, increasing the amount of scrap materials and dismantling costs, as well as many new materials needed, The construction method was not considered.
[0010]
The present invention has been made in view of such points, the purpose of which is to improve the double floor structure, facilitate the construction and piping wiring work, while reducing the amount of waste and dismantling costs, The purpose is to improve the sound insulation performance of the floor and solve the above problems all at once.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, according to the invention of claim 1, on the floor substrate. The surface floor is placed on the top surface of the floor substrate Lower pedestal made of elastic material And the surface floor is placed on the surface floor. By the support leg that connects the upper surface floor support member with the shaft material Supported, Between this surface floor and the floor substrate A buffer plate is disposed, and the buffer plate causes a space between the surface floor and the floor substrate to be a first space portion positioned between the surface floor and the buffer plate, and a second space portion positioned between the floor substrate and the buffer plate. Compartmented In this buffer plate, The support legs The hole to be inserted And a gap is formed between the hole and the shaft member of the support leg so as to communicate the first and second spaces. It is provided.
[0012]
According to the above configuration, the surface floor is supported by the support legs with respect to the floor substrate, and the buffer plate having the holes into which the support legs are inserted is disposed between the surface floor and the floor substrate, and the buffer plate supports the surface. Between the floor and the floor substrate Located between the surface floor and the buffer plate An upper first space and Located between the floor substrate and the buffer plate It is divided into a lower second space portion, and both space portions are holes for inserting the support legs. And the shaft of the support leg Because it communicates via the floor, it is only necessary to install a surface floor on the upper surface of the surface floor support member on the upper part of the support leg, and the level difference of the floor between the Japanese-style room or the Western-style room can be eliminated. It is not necessary to adjust the level by cutting off the upper part of the existing threshold.
[0013]
In addition, when new pipe wiring work such as gas, water supply, electricity, etc. is necessary, it is only necessary to place the pipe / wiring on the buffer plate, so that the work time and labor are reduced, and maintenance can be facilitated. .
[0014]
In addition, when refurbishing the floor structure of a second-hand house, it can be used as a cushioning material, with almost no existing members (floor finishing materials, floor base materials, etc.) removed. It can be repaired with an environmentally friendly construction method, such as shortening the cost, reducing the cost of dismantling, and reducing noise on site.
[0015]
In addition, since the supporting sound can prevent the impact sound generated from the surface floor from directly propagating to the floor substrate, the sound insulation performance is larger than the large joist structure. For example, the floor impact sound can be greatly improved by about 5 ranks.
[0016]
In addition, in the case of a floor structure, due to the displacement of the support legs due to vibration from the floor finish surface, a momentary deflection phenomenon occurs in the floor base material, and the air in the space between the floor substrate and the floor base material directly flows into the floor. Compress the substrate. On the other hand, in the sound insulation floor structure of the present invention, since the buffer plate is located in the space portion between the floor substrate and the floor base material, the initial compression hits the buffer plate, thereby compressing the floor substrate. Is greatly relaxed. In addition, since air flows in the lateral direction in the space, the aero damper function in a more dispersed form is demonstrated, the performance of blocking weight and light floor impact sound is improved, and heavy floor impact sound Will be further improved by 1 rank.
[0017]
In the invention of claim 2, the buffer plate is provided with a plurality of holes communicating with the first and second spaces, and support legs are inserted into a part of the plurality of holes.
[0018]
In this way, the plurality of holes formed in the buffer plate are provided not only for insertion of the support legs, but also as holes for communicating the upper and lower spaces of the buffer plate, so that the sound insulation performance is achieved by the effect of the resonator. Further improve.
[0019]
According to a third aspect of the present invention, a sound absorbing material is provided in the first space portion. As a result, the sound absorbing material in the first space part alleviates the initial compression impact generated by the vibration from the surface floor, so that it is possible to improve the sound insulation performance, particularly the sound insulation performance of the lightweight floor impact sound.
[0020]
The invention of claim 4 is a construction method of a sound insulation floor structure, and first, a plurality of holes are formed in an existing floor finish material and / or floor base material. Next, a support leg formed by connecting a lower pedestal made of an elastic body and an upper surface floor support member with a shaft member is brought into contact with the floor finishing material and / or the floor base material with a part of the plurality of holes. Without this, a gap is formed between the hole portion and the shaft member of the support leg so that the space portions on both the upper and lower sides of the floor finish and / or the floor base material communicate with each other. Insert like The support leg is placed on the floor substrate so that the pedestal is placed on the top surface of the floor substrate. Install. Then, the surface floor is placed on the surface floor support member of the support leg. The surface floor support member is in contact with the lower surface of the surface floor. Provide.
[0021]
As a result, when renovating the floor structure of a second-hand house, it can be used as a cushioning material with almost no existing floor finish or floor base material removed, reducing the amount of waste material and shortening construction time. It can be modified with an environmentally friendly construction method such as a reduction in dismantling costs and a reduction in site noise.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1)
FIG. 1 shows a sound insulation floor structure according to Embodiment 1 of the present invention. 1 is a flat substrate such as a condominium such as an apartment or a condominium, a concrete slab in a building, etc. A surface floor disposed on the upper side of the floor substrate 1 at a predetermined interval, the surface floor 2 being a floor base material 3 composed of a floor panel and a floor finishing material which is located on the upper surface and constitutes a flooring It consists of four.
[0023]
The surface floor 2 is supported on the floor substrate 1 by a plurality of support legs 10, 10,. Each support leg 10 is integrally attached and fixed to a round bar-shaped shaft member 11 extending in the vertical direction and a lower end portion of the shaft member 11, and has a truncated cone-shaped rubber (elastic body) larger than the shaft member 11. ) And a rectangular plate-like surface floor support member 13 integrally attached and fixed to the upper end portion of the shaft member 11. That is, the pedestal 12 and the surface floor support member 13 are integrally connected by the shaft member 11. The pedestal 12 may be a synthetic rubber such as natural rubber, isoprene rubber, silicon rubber, or the like, and may be another elastic body. The pedestal 12 of the support leg 10 is placed on the upper surface of the floor substrate 1, while the surface floor support member 13 abuts on the lower surface of the floor base material 3 of the surface floor 2 and places it thereon. The surface floor 2 is supported on the floor substrate 1 by support legs 10, 10,.
[0024]
A buffer plate 18 is disposed between the surface floor 2 and the floor substrate 1, and a space between the surface floor 2 and the floor substrate 1 is located between the surface floor 2 and the buffer plate 18 by the buffer plate 18. The upper first space portion 19 and the lower second space portion 20 located between the floor substrate 1 and the buffer plate 18 are partitioned.
[0025]
The buffer plate 18 has support leg insertion holes 23, 23,... Into which the support legs 10 are inserted at predetermined positions corresponding to the support legs 10, 10,. Each hole 23 has a larger diameter (for example, 30 mm) than the outer diameter of the shaft member 11 and the pedestal 12 of the support leg 10. In the state where the support leg 10 is inserted into each hole 23, the support leg 10 The shaft member 11 has a gap with the buffer plate 18 around the hole 23, and the first space above the buffer plate 18 by the gap with the support leg 10 in the hole 23. The portion 19 and the second space portion 20 below the buffer plate 18 are communicated with each other. In FIG. 1, reference numeral 24 denotes a pipe or wiring representing gas or water pipes or electric wiring placed on the buffer plate 18.
[0026]
Therefore, in this embodiment, since the surface floor 2 is supported on the floor substrate 1 by the plurality of support legs 10, 10,..., The surface floor support member 13 of each support leg 10 has an upper surface below the surface floor 2. It is only necessary to install the base material 3 and the floor finishing material 4, eliminate the level difference between the Japanese-style room and the Western-style room, and do not adjust the level by cutting off the upper part of the existing sill like the large pull joist structure (see Fig. 10) Also good.
[0027]
In addition, since the buffer plate 18 is disposed between the surface floor 2 and the floor substrate 1 and each support leg 10 is inserted into the hole 23, when new piping or wiring work is required, these The piping / wiring 24 may be placed on the buffer plate 18, and the working time and labor of the piping work or wiring work are reduced, and the maintenance thereof is facilitated.
[0028]
Further, since the surface floor 2 is supported on the floor substrate 1 by a plurality of support legs 10, 10,..., The support legs 10, 10 prevent the impact sound generated from the surface floor 2 from propagating directly to the floor substrate 1. ,... Can be prevented, and the sound insulation performance can be greatly improved with respect to the large joist structure.
[0029]
Moreover, the surface floor 2 and the floor substrate 1 are partitioned into a first space portion 19 on the upper side and a second space portion 20 on the lower side by a buffer plate positioned between the two, and both the space portions 19 and 20 are supported on the supporting legs. Since the holes are communicated through the insertion holes 2323,..., The floor base material is instantaneously bent due to the displacement of the support leg due to the vibration from the floor finish surface, like the floor structure, and the floor substrate and the under floor There is no phenomenon in which the air in the space with the ground material directly compresses and hits the floor substrate, and the initial compressing impact vibrates the buffer plate 18 and the compressive impact on the floor substrate 1 is greatly reduced. In addition, the air flow in the lateral direction in the first space portion 19 is generated, and the aero damper function is exhibited in a more dispersed form, so that the performance of blocking the weight and light floor impact sound is further improved.
[0030]
(Embodiment 2)
FIG. 2 shows a second embodiment of the present invention (in the following embodiments, the same parts as those in FIG. 1 are denoted by the same reference numerals and detailed description thereof is omitted), and the surface floor 2 of another structure is shown. Is applied.
[0031]
That is, in this embodiment, the surface floor 2 is composed of a floor base material 3 and a floor finish board, as in the first embodiment, and a support member is inserted into the floor base material 3 at a position to be supported by each support leg 10. A hole 5 is opened. The pedestal 12 at the lower end portion of the support leg 10 is made of a truncated cone-shaped rubber as in the first embodiment, whereas the surface floor support member 13 at the upper end portion of the support leg 10 is different from that in the first embodiment. A cylindrical large-diameter portion 14 concentrically attached to the upper end portion of the material 11, and a cylindrical small-diameter portion 15 that is integrally formed concentrically on the upper surface of the large-diameter portion 14 and has a smaller diameter than the large-diameter portion 14. A two-stage structure consisting of The lower large-diameter portion 14 has a larger diameter than the support member insertion hole 5 of the floor base material 3 and cannot be inserted into the support member insertion hole 5, whereas the upper small-diameter portion 15 has a support member insertion hole 5. 5 is slightly smaller than 5 and can be inserted into the support member insertion hole 5. The small-diameter portion 15 of the surface floor support member 13 is inserted into the support member insertion hole 5 from below and placed on the large-diameter portion 14. By placing the floor base material 3 at the periphery of the support member insertion hole 5, the surface floor 2 is supported on the floor substrate 1 by the support legs 10 while the floor base material 3 is engaged by the surface floor support member 13. Has been.
[0032]
Further, the buffer plate 18 is positioned higher than that of the first embodiment, that is, on the upper surface floor 2 side, and the height of the first space portion 19 is lower than that of the second space portion 20. Other configurations are the same as those of the first embodiment. Therefore, this embodiment can achieve the same effects as those of the first embodiment.
[0033]
(Embodiment 3)
FIG. 3 shows a third embodiment in which the structure of the hole in the buffer plate 18 is changed. That is, in the third embodiment, like the first and second embodiments, support leg insertion holes 23, 23,... For inserting the support legs 10 are formed in portions corresponding to the support legs 10 in the buffer plate 18. Has been.
[0034]
In addition to the support leg insertion holes 23, 23,..., The buffer plate 18 is used only for the purpose of communicating the first space 19 on the upper side of the buffer plate 18 and the second space 20 on the lower side. Are formed with communication holes 25, 25,. Therefore, the buffer plate 18 is provided with a plurality of holes 23, 23,..., 25, 25, etc. that communicate the first and second spaces 19, 20, and the plurality of holes 23, 23,. .. Are partly inserted with support legs 10, 10,....
[0035]
Each of the communication hole portions 25 has a smaller diameter than the support leg insertion hole portion 23 and is preferably set to, for example, 13 to 15 mm in view of the sound insulation effect, but is not limited thereto. The number of communication holes 25 is 64 / m. ² Although it is preferable for the sound insulation effect to set it as (0.8 to 1.1% of the area of the buffer plate 18), it is not limited to this.
[0036]
Therefore, also in this embodiment, the same effect as in the first and second embodiments can be obtained. In particular, in the case of this embodiment, the plurality of holes 23, 23,..., 25, 25, etc. opened in the buffer plate 18 are not only for inserting the support legs 10, but also above and below the buffer plate 18. Since it is provided also as the communication holes 25, 25,... For communicating both the space portions 19, 20, the blocking performance can be improved by the effect of the resonator.
[0037]
(Embodiment 4)
FIG. 4 shows a fourth embodiment. In this embodiment, a sound absorbing material 27 is arranged in the first space portion 19 between the buffer plate 18 and the floor base material 3 of the surface floor 2. The sound absorbing material 27 is made of, for example, an inorganic fiber board such as glass wool or rock wool, a felt, a soft fiber board, or the like. In order to avoid interference between the sound absorbing material 27 and the support leg 10, a hole for inserting the support leg 10 may be formed in the sound absorbing material 27, and the sound absorbing material 27 is disposed at a position excluding the support leg 10. May be.
[0038]
Therefore, in this embodiment, in addition to the effects of Embodiments 1 and 2, the sound absorbing material 27 of the first space portion 19 is generated by vibration from the surface of the floor finishing material 4 of the surface floor 2. Since the initial compression hit is alleviated, it is possible to improve the sound insulation performance, particularly the sound insulation performance of the light floor impact sound.
[0039]
(Embodiment 5)
FIGS. 5-9 shows Embodiment 5 of this invention, and shows the construction method when renovating the floor structure of a used house to the sound-insulating floor structure of this invention.
[0040]
That is, in this embodiment, as shown in FIG. 8, the first Western-style room R1, the first Japanese-style room R2, the second Western-style room R3, and the second Japanese-style room R4 are provided from the left side in FIG. As shown in FIG. 9, the first Japanese-style room R2 and the second Western-style room R3 are modified so as to be changed to one new Western-style room R. In the floor structure of the first and second western-style rooms R1 and R3, a floor finish 32 is laid on the joists 31 to form a flooring. In the floor structure of the first and second Japanese-style rooms R1 and R4, a tatami mat 34 is laid as a floor finishing material on a rough floor 33 as a floor base material. 35 is a sill installed around each of the rooms R1 to R4, and 36 is a base.
[0041]
As shown in FIGS. 5 and 9, in the first and second western-style rooms R1, R3, the floor finishing material 32 is used as a buffer plate 18, and support leg insertion holes 23, 23,. .. May be formed as in the third embodiment. Further, in the first and second Japanese-style rooms R2, R4, the tatami mat 34 is peeled off and removed, and the underlying floor 33 is used as a buffer plate 18 so that the support leg insertion holes 23, 23,. Communication holes 25, 25, ...) are formed.
[0042]
Next, as shown in FIGS. 6 and 9, each support leg insertion hole 23 of the buffer plate 18 of each of the rooms R1 to R4 (floor finishing material 32 in the Western rooms R1 and R3 and rough floor 33 in the Japanese rooms R2 and R4). The support leg 10 is inserted from the pedestal 12 side so as not to contact the floor finishing material 32 and the rough floor 33 (buffer plate 18) around the hole 23, and the pedestal 12 is placed on the floor substrate 1. The support legs 10 used in the Western-style rooms R1 and R3 have the structure of the above-described embodiment 2 (the one in which the small diameter portion 15 to be inserted into the support member insertion hole 5 of the surface floor support member 13 is formed). The support legs 10 used for R2 and R4 have the structure of the first embodiment (the surface floor support member 13 has a plate shape). Moreover, the height of the support leg 10 used for 2nd Japanese-style room R4 is lower than the support leg 10 used for 1st Japanese-style room R2.
[0043]
Then, if necessary, pipes / wirings 24 are installed on the buffer plate 18 and a sound absorbing material 27 is placed thereon. Then, the floor base material of the surface floor 2 is placed on the surface floor support member 13 of each support leg 10. 3 is placed and supported. At this time, in the Western rooms R1 and R3, the small diameter portion 15 of the surface floor support member 13 is inserted into the support member insertion hole 5 of the floor base material 3, and the floor base material 3 around the support member insertion hole 5 is the large diameter portion 14. On the other hand, in the Japanese-style rooms R2 and R4, the lower surface of the floor base material 3 is placed on the upper surface of the surface floor support member 13. In the first Japanese-style room R2 and the second Western-style room R3, the floor base material 3 is placed on the sill 35 between the two rooms R2 and R3 so as to continue across the two rooms R2 and R3.
[0044]
Thereafter, as shown in FIGS. 7 and 9, the floor finishing material 4 is provided on the upper surface of the floor base material 3 of the first Western room R1, and the floor finishing material 4 is provided on the upper surfaces of the floor base material 3 of the first Japanese room R2 and the second Western room R3. Are each constructed. In addition, a tatami mat 28 having a thickness substantially the same as that of the floor finishing material 4 of the other chambers R1 to R3 (thinner than the tatami mat 34 before renovation) is laid on the upper surface of the floor base material 3 of the second Japanese room R4. Furthermore, the sill 35 between the first Japanese-style room R2 and the second Western-style room R3 is covered with the floor base material 3 and the floor finishing material 4, but the sill 35 between the first Western-style room R1 and the first Japanese-style room R2 and the second Western-style room R3. And the sill 35 between the second Japanese-style room R4 and the sill 35 on the opposite side of the second Japanese-style room R4 from the second Western-style room R3 are the surface floor 2 composed of the floor base material 3, the floor finishing material 4 and the tatami mat 28. A step is generated at a position lower than the upper surface of the slab, and a new sill 29 having a thickness substantially the same as that of the surface floor 2 is constructed on each sill 35 via an adjusting material 30 (see FIG. 7). .
[0045]
As described above, the first Japanese-style room R2 and the second western-style room R3 are repaired into one western-style room R. At the same time, the floor structure of the new Western-style room R, the first Western-style room R1 and the second Japanese-style room R4 includes a pedestal 12 whose surface floor 2 is made of an elastic body on the floor substrate 1, a surface floor support member 13, and these. A buffer plate 18 is arranged between the surface floor 2 and the floor substrate 1 to form the first and second space portions 19 and 20, and is supported by the support legs 10 including the shaft members 11 connected to each other. The support leg insertion hole portions 23, 23,... (And the communication hole portions 25, 25,.
[0046]
Note that FIG. 10 shows a large joist structure for making the first Japanese-style room R2 and the second western-style room R3 shown in FIG. 8 into one western-style room R in the same manner as described above. After removing the tatami 34 in the Japanese-style room R2, the foamed plastic floor base material 37 is placed on the upper surface of the rough floor 33, and the auxiliary members 38, 38 are fixed to both sides of the foam plastic floor base material 37, and then foamed. A new floor finish 4 over the floor finish 4 of the second Western-style room R3 is pasted on the upper surfaces of the plastic floor base material 37 and the auxiliary members 38, 38. The level adjustment is performed by cutting off the upper part of the existing sill 35 between the first Japanese-style room R2 and the second Western-style room R3. In addition, when new wiring work for electricity, gas, water, etc. is required, a part of the existing floor finish 32 is removed, and electrical wiring, gas pipes, water pipes, etc. After the wiring 24 is installed, the existing floor finishing material 32 is restored and the floor finishing material 4 is newly constructed.
[0047]
Therefore, by performing the renovation work as in the fifth embodiment, at the time of renovation of the floor structure of the used house, the existing floor finishing material 32, the rough floor 33, etc. are hardly removed like the large pull joist structure. It can be used as the buffer material 18 and can be repaired by an environmentally friendly construction method such as reduction of waste material, shortening of construction time, reduction of dismantling costs and reduction of site noise.
[0048]
【Example】
Next, a specific example will be described. For the sound insulation floor structure (example of the present invention) and the large pull joist structure (see FIG. 10) of the first and second embodiments, a lightweight floor impact test by a tapping machine and a heavy floor impact test by a bung machine are performed according to JISA 1418 standard. went. Light floor impact sounds and heavy floor impact sounds are individual propagation sounds, and heavy floor impact sounds that are assumed to be children's jumping are loud impact sounds. FIG. 11 shows the test results for the sound insulation floor structures of the first and second embodiments, and FIG. 12 shows the results for the large pull joist structure.
[0049]
For reference, the floor impact sound level determined by the Architectural Institute of Japan (grade related to floor impact sound level) is shown in Table 1 below.
[0050]
[Table 1]

[0051]
In the large pull joist structure, the impact sound generated from the floor finish 4 is directly transmitted to the lower floor via the joists 31 and the base 36. Therefore, the sound insulation performance when the thickness of the floor substrate 1 (floor slab) is 110 mm is a heavy floor. The impact sound was L-80, and the lightweight floor impact sound was L-70.
[0052]
On the other hand, in the example of the present invention, when the thickness of the floor substrate 1 is 110 mm, the sound insulation performance is L-75 for the heavy floor impact sound, L-45 for the light floor impact sound, and the large joist structure. Thus, it can be seen that the sound insulation performance is improved by one rank for heavy floor impact sound and significantly (for five ranks) for light floor impact sound.
[0053]
【The invention's effect】
As described above, in the first aspect of the invention, the surface floor is formed by the support leg formed by connecting the base made of the elastic body and the surface floor support member by the shaft member. In contact with the surface floor support member Support on the floor substrate, and a buffer plate between this surface floor and the floor substrate The space between the surface floor and the floor substrate is The first and second spaces are Parcel Arranged to be formed on this buffer plate, Insert the hole into which the support leg is inserted between the hole and the shaft of the support leg. Communicating the first and second spaces To create a gap Provided. In the invention of claim 2, the buffer plate is provided with a plurality of holes communicating with the first and second space portions, and the support legs are inserted into a part of the plurality of holes. According to these inventions, it is not necessary to adjust the level by cutting off the upper part of the existing sill like the large pull joist structure, and the construction can be facilitated. In addition, new piping wiring can be placed on the buffer plate, and the working time, labor, and maintenance can be facilitated. Furthermore, when renovating the floor structure, existing members can be used as cushioning materials to reduce the amount of waste materials at the time of refurbishment, shorten construction time, reduce dismantling costs, and reduce site noise. Also, the impact sound generated from the surface floor is prevented from propagating directly to the floor substrate by the support legs, and the sound insulation performance can be greatly improved with respect to the large joist structure. Furthermore, since the initial compression blow due to the flexure phenomenon momentarily generated in the floor base material due to the displacement of the support leg due to the vibration from the floor finish surface vibrates the buffer plate, the compression blow to the floor substrate is greatly reduced. In addition, the air flow in the lateral direction in the space portion is generated, and the aero damper function in a more dispersed form is exhibited, thereby further improving the insulation performance of weight and light floor impact sound.
[0054]
According to the invention of claim 3, by providing the sound absorbing material in the first space portion, the initial compressive impact generated by the vibration from the surface floor is relieved by the sound absorbing material, and the sound insulation performance, particularly the light floor impact sound. The sound insulation performance can be improved.
[0055]
According to the invention of claim 4, a plurality of holes are formed in an existing floor finish material and / or floor base material, and a pedestal made of an elastic body and a surface floor support member are formed in a part of the plurality of holes. Contact the support legs, which are connected by shafts, with the floor finish and / or floor base material Without this, a gap is formed between the hole portion and the shaft member of the support leg so that the space portions on both the upper and lower sides of the floor finish and / or the floor base material communicate with each other. Insert like The support legs are placed on the floor board and the pedestal is placed on the floor board. Install the surface floor on the surface floor support member of its support legs Make sure that the floor support member touches the bottom surface of the floor When renovating the floor structure of a second-hand house, the existing materials will be used as cushioning materials to reduce the amount of waste, shorten construction time, reduce dismantling costs, and reduce site noise. It can be refurbished with the construction method.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a sound insulating floor structure according to Embodiment 1 of the present invention.
FIG. 2 is a view corresponding to FIG. 1, illustrating a sound insulation floor structure according to a second embodiment.
FIG. 3 is an exploded perspective view showing a sound insulation floor structure according to a third embodiment.
FIG. 4 is a view corresponding to FIG. 3, showing a sound insulating floor structure according to a fourth embodiment.
FIG. 5 is a perspective view showing a front part of a process when the floor structure of a used house is modified to a sound insulating floor structure in the fifth embodiment.
FIG. 6 is a view corresponding to FIG. 5 showing an intermediate part of the process.
FIG. 7 is a view corresponding to FIG.
FIG. 8 is a cross-sectional view showing the floor structure of a used house before the sound insulation floor structure is repaired in the fifth embodiment.
FIG. 9 is a view corresponding to FIG. 8 showing the sound insulation floor structure after renovation.
FIG. 10 is a view corresponding to FIG. 8, showing a large joist structure for refurbishment.
FIG. 11 is a diagram showing the sound insulation performance of the sound insulation floor structure.
FIG. 12 is a diagram showing the sound insulation performance of the large pull joist structure.
[Explanation of symbols]
1 Floor board
2 Surface floor
3 Floor material
4 Floor finish board
10 Support legs
11 Shaft material
12 pedestal
13 Surface floor support member
18 Buffer plate
19 First space
20 Second space
23 Support leg insertion hole
24 Piping and wiring
25 hole for communication
27 Sound absorbing material
32 Existing floor finish
33 Rough floor (existing floor base material)

Claims (4)

A lower surface pedestal made of an elastic material placed on the upper surface of the floor substrate is connected to the upper surface floor supporting member that contacts the surface floor and mounts the upper surface floor with a shaft member. Supported by the supporting legs ,
A buffer plate is disposed between the surface floor and the floor substrate , and the buffer plate causes a space between the surface floor and the floor substrate to be between the first space portion located between the surface floor and the buffer plate, and the floor substrate and the buffer plate. Partitioned into a second space located at
The buffer plate is provided with a hole portion into which the support leg is inserted so that a gap is formed between the hole portion and the shaft member of the support leg so as to communicate the first and second space portions . Sound insulation floor structure characterized by In the sound insulation floor structure of Claim 1,
The buffer plate is provided with a plurality of holes that communicate the first and second spaces.
A sound insulation floor structure in which a support leg is inserted into a part of the plurality of holes. In the sound insulation floor structure according to claim 1 or 2,
A sound insulating floor structure, wherein a sound absorbing material is provided in the first space. A plurality of holes are formed in the existing floor finish and / or floor base material,
A support leg formed by connecting a lower pedestal made of an elastic body and an upper surface floor support member with a shaft member is not in contact with the floor finishing material and / or the floor base material at a part of the plurality of holes. Is inserted between the hole and the shaft material of the support leg so as to create a gap that communicates the space on both the upper and lower sides of the floor finish material and / or the floor base material , and the support leg is placed on the pedestal on the floor substrate. Is placed on the top of the floor board ,
A method for constructing a sound insulation floor structure, wherein a surface floor is provided on a surface floor support member of the support leg so that the surface floor support member abuts on a lower surface of the surface floor.

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