JPH0243460A - Floor structure - Google Patents

Abstract

PURPOSE:To improve a sound insulating effect without deteriorating a shock- sound absorbing force despite long time use by using a floor panel made of a porous board and ensuring the escaping place of air contained in a buffering material which is in contact with the bottom face of a floor finish material, on the lower portion of the buffering material. CONSTITUTION:A floor panel material 3 on which gas-permeating ports 31 passing through in a vertical direction are dispersedly provided all over is placed on a floor backing 1 via floor joists 2A, etc., and a floor finish material 5 is placed thereon via a buffering material 4 of a fibrous buffering material containing air or a continuous foam type foamed synthetic rein buffering material, etc. As an impact force is applied to the top of the floor finish material 5, the buffering material 4 is compressed discharging air therein downward through the gas-permeating ports 31 of the panel material 3 to reduce a floor shock sound. Also, air in the buffering material 4 always flows to prevent the stagnation of humidity, thereby preventing the deterioration of the restoring force caused by humidity of the buffering material 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a floor structure with soundproofing properties, and particularly relates to a floor structure that reduces the transmission of floor impact noise from upper floors of apartment buildings to lower floors. .

(Prior Art) Various types of floor structures are known, such as the one shown in FIG. There is a floating floor structure in which floor finishing material e is applied on the upper surface of the cushioning material with floor joists C and plywood d for temporary pasting interposed therebetween. In this floating floor structure, when the impact force applied to the floor finishing material e is transmitted to the subfloor a through the plywood d and the joists C, the impact force is absorbed by the cushioning material S, thereby reducing floor impact noise to the downstairs. The aim is to reduce the spread of

However, in this floating floor structure, the floor finishing material e and the disposable plywood d are not treated to absorb impact forces, so the floor finishing material e and the disposable plywood d
It is easy to vibrate when subjected to impact force, and the vibration tends to continue for a long time. Therefore, when this floating floor structure is used on a typical 150*@thick concrete floor slab and the floor impact sound level is measured, it is found that at the floor impact sound level specified in JI-A-1419, the light floor impact sound is L-
55. The performance is only L-60 for heavy floor impact sound, and the floor impact sound is at a level where it is not very noticeable, that is, L-50 or less for light floor impact sound, and L- for heavy floor impact sound.
It was difficult to reduce impact noise to a performance of 55 or less.

In addition, in order to directly absorb the floor impact force applied to the floor finishing material e, a cushioning material made of foam, fiber mat, etc. is attached to the entire bottom surface of the floor finishing material e, as shown in Figure 8. Ok,
A soundproof floor structure using directly bonded flooring materials has also been proposed, in which these materials are directly bonded onto the subfloor a.

However, in this floor structure, the cushioning material and the floor base a
Since it is sandwiched between the cushioning material and the floor finishing material e, there is no place for the air in the cushioning material to escape when an impact force is applied to the floor finishing material e. Therefore, when a gravimetric impact force that causes the floor finishing material e to sink significantly is applied, the air inside the cushioning material is rapidly compressed and the internal air pressure increases, allowing the cushioning material to compress smoothly. The problem is that it does not deform and transmits most of the impact force from the floor as it is. Therefore, even if this floor finishing material e is used alone, and even if this floor finishing material e is combined with the above-mentioned floating floor structure, the air pressure will increase between the floor finishing material e and the waste plywood d, and the vibration of the waste plywood d will not stop. Almost no soundproofing effect against weight method impact force can be expected.

In addition, in the floating floor structure, since the cushioning material is laid directly on the subfloor a, it is affected by moisture and alkaline content in the concrete slab, resulting in a decrease in restoring power and deterioration.
There is a problem in that when used for a long period of time, the ability to absorb impact force becomes poor.

On the other hand, a floor panel f on which a floor finishing material e is placed, as shown in FIG. A floor structure is also known in which the floor structure is supported by legs g formed by a combination of the floor structure and the elastic body absorbs floor impact force.

However, similar to the floating floor structure described above, this floor structure also has the problem that the floor finishing material e and the floor panel f tend to vibrate when subjected to impact force, and the vibration tends to continue for a long time, so that a sufficient soundproofing effect cannot be obtained. There wasn't.

(Purpose of the Invention) As described above, in view of the fact that all of the conventionally known floor structures do not have sufficient soundproofing properties, especially against weight method impact forces, the present invention aims to reduce not only lightweight floor impact noise but also heavy weight To provide a floor structure which can exhibit high soundproofing properties even against floor impact sounds and whose impact sound absorption ability does not deteriorate even after long-term use.

(Means for Solving the Problems) In order to achieve the above object, the present invention brings a cushioning material into contact with the lower surface of the floor finishing material, and also secures an escape area for the air in the cushioning material below the cushioning material. It is something.

Specifically, the solution taken by the present invention is to construct a floor structure by installing joists, legs, etc. on a subfloor made of a concrete slab or the like so that a space under the floor panel is formed between the floor panel material and the subfloor. The floor panel material is supported substantially horizontally at an appropriate height via an appropriate support member, and a breathable cushioning material containing air, such as a fibrous cushioning material or an open-cell type foamed synthetic resin cushioning material, is provided on the upper surface of the floor panel material. A floor finishing material is placed therebetween, and the floor panel material is arranged in a vertical direction in order to discharge compressed air in the cushioning material, which is generated when an impact force is applied to the floor finishing material, to the space under the floor panel. The structure is made of a perforated plate in which vent holes penetrating through the space are provided in a dispersed manner.

(Function) With the above configuration, when an impact force is applied to the upper surface of the floor finishing material, the cushioning material is compressed, but the air in the cushioning material passes through the ventilation holes provided in the floor panel material to the space under the floor panel. Since the air is discharged, the air pressure in the cushioning material does not increase. For this reason, the original shock absorbing power of the cushioning material is maintained between the floor finishing material and the floor panel material, and the vibration of the floor finishing material and floor panel stops in a short time, reducing the impact force transmitted to the floor substrate and the vibration of the floor panel. becomes extremely small, and floor impact noise is sufficiently reduced. In addition, the air in the cushioning material is released into the space under the floor panel below and is reabsorbed, so the air in the cushioning material is constantly flowing, preventing moisture from accumulating, and restoring the cushioning material. There is no need to worry about the power decreasing due to moisture.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a cross-sectional structure of an embodiment of the floor structure according to the present invention, in which a floor panel material 3 is supported substantially horizontally on a floor base 1 from a concrete slab or the like via a joist 2A that is a supporting member, A floor finishing material 5 is placed on the upper surface of this floor panel material 3 with a cushioning material 4 interposed therebetween.

As the floor finishing material 5, plywood, flooring material, etc. can be used as appropriate, and as the cushioning material 4, fibers such as synthetic fiber mats such as nylon, polyester, and polypropyne, inorganic fiber mats such as glass wool and rock wool, or vegetable fiber mats can be used. A material that contains air and has air permeability, such as a soft cushioning material or an open-cell foamed synthetic resin cushioning material, can be used as appropriate. As the cushioning material 4, a non-breathable material, such as a closed-cell foamed plastic sheet, has cushioning properties in terms of walking feeling, but cannot reduce the impact force. The reason is that when an impact force is applied to the floor finishing material 5, the cushioning material 4 is compressed between it and the floor panel material 3, and the internal air pressure increases, pushing the floor panel material 3 and the floor finishing material 5 outward. There is a repulsive force that pushes you away. This is because the vibrations generated in the floor finishing material 5 due to the impact force are amplified by this repulsive force.

The thickness of the cushioning material 4 is preferably 5 mm or more, and is 8 to 255 m.
is more preferable. The reason is as follows.

In other words, if the thickness is less than 5u+, the amount of compressive deformation when the air in the cushioning material 4 escapes and the thickness decreases is small, so the impact force of the floor finishing material 5 during a heavy floor impact is reduced. This is because the impact is not absorbed and is directly transmitted to the floor panel material 3, so the impact absorption ability is weak.

Further, although there are some differences depending on the material, if the thickness exceeds 251 mm, the floor finishing material 5 will sink significantly during a heavy floor impact, and stability will be impaired. However, if the cushioning material 4 is formed from a combination of a soft material and a slightly hard material, the thickness may be greater than 25a+m because stability will be improved.

Note that as a method for interposing the cushioning material 4, the cushioning material 4 may be adhered in advance to either the lower surface of the floor finishing material 5 or the upper surface of the floor panel material 3, or the cushioning material 4 may be attached to the floor panel material without adhesion. It is also possible to simply place it on the top surface of 3.

As the floor panel material 3, a material having rigidity that can stably support the floor finishing material 5 via the cushioning material 4 can be used as appropriate.
Specifically, particle board, plywood, wood cement board, gypsum board, precast concrete, steel plate, etc. can be used.

This floor panel material 3 has a diameter of 3 to 20 mm that penetrates in the vertical direction.
Ventilation holes 31 having a diameter of m5 are provided so as to be distributed approximately evenly over the entire surface. The pitch of the ventilation holes 31 is preferably 5 to 30 cm, and the shape of the ventilation holes 31 may be elongated holes. Generally, the opening ratio of the ventilation holes 31 is preferably 1% or more with respect to the total surface area of the floor panel material 3, and it is even better to change it as appropriate depending on the material of the cushioning material 4. When the cushioning material 4 is made of fibrous materials such as synthetic fibers or inorganic fibers, the air flow is preferably 1 to 5% because the air flow is smooth, and when the cushioning material 4 is made of polyurethane foam, the air flow is smoother than that of fibrous materials. Since it is small, 3 to 5% is preferable.

The floor panel material 3 is supported at an appropriate height by the joists 2A,
A space 6 under the floor panel is formed between the floor panel material 3 and the floor base 1.

In this embodiment, elastic bodies 7 are arranged above and below the joist 2A to more effectively absorb the floor impact force. When combining the floor support material and the elastic body 7 in this way, relatively rigid rubber, high-density foam, etc. may be used as the material for the elastic body 7 to prevent the floor panel material 3 from sinking deeply due to the load on the floor. It is preferable to use

The space 6 under the floor panel is provided to diffuse the air in the cushioning material 4, and needs to have a sufficient volume for the air to diffuse, and specifically, it should have a height of 30 ms or more. preferable.

Since the floor structure according to this embodiment is constructed as described above, when a floor impact force as shown by the arrow in FIG. 2 is applied, the following occurs. In other words, the floor finishing material 5 bends and deforms due to the floor impact force and sinks, so the cushioning material 4
is compressed. When the cushioning material 4 is compressed, the air inside the cushioning material 4 is discharged through the ventilation hole 31 of the floor panel material 3 to the space under the floor panel 6 and is diffused there, so that the air pressure in the cushioning material 4 does not increase. For this reason, the original compressive deformation of the cushioning material 4 occurs, exerting its shock absorbing power, and even if an impact force is applied to the floor, the vibrations of the floor panel material 3 and floor finishing material 5 are attenuated, reducing the sound transmitted downstairs. .

FIG. 3 shows a modification of the above embodiment, in which the floor panel material 3 is supported by legs 2B which are supporting members. Leg body 2
B consists of a rod-shaped support 21B having a plate-shaped mounting portion on the upper part, and an elastic body 22B made of rubber or the like fixed to the lower part of this support 21B.

Incidentally, although not shown in the drawings, the support member may be in the form of a block.

FIG. 4 shows another modification of the above embodiment, in which a threaded portion is provided at the top of the rod-shaped support 21B. The threaded portion here is screwed into the floor panel material 3, and the height of the floor panel material 3 can be adjusted by rotating the legs 2B.

By using the leg body 2B having a height adjustment mechanism in this way, unevenness can be easily adjusted, so unevenness can be absorbed within the range of the thickness of the cushioning material as shown in Fig. 7 or 8. Compared to conventional systems, it is possible to deal with large uneven terrain.

In addition, in this modified example, the floor impact force applied to the floor finishing material 5 is once absorbed by the cushioning material 4, and then the leg body 2
Since the impact force is transmitted to the leg body 2B, the impact force applied to the leg body 2B is reduced, and a situation where an excessive impact force is applied to the threaded portion for height adjustment and damage to the threaded portion can be avoided.

Note that in the above embodiments and modified examples, the floor base 1 is a concrete slab, but the floor base 1 may also be a wooden structure, and in this case, the space 6 under the floor panel is converted into a space under the ceiling. It can be done.

Specific examples, comparative examples, and their test results will be described below.

As a specific example, we prepared the following floor structure.

Concrete slab support member with a thickness of 150 m in the upper room on the second floor of the floor: A rod-shaped support with a threaded part and a rubber hardness of 45
Leg floor panel material consisting of rubber elastic body: diameter 12
Particle board cushioning material with a thickness of 151 m with 1111 air holes uniformly provided at a pitch of 15 cm: crimped fibers of voliv a pyrene with a density of 0°02 g/
Synthetic fiber felt bonded to form a mat so as to form a mat, and fixed to the back side of the floor finishing material with an adhesive Floor finishing material: 121 m thick plywood floor board Comparative Example 1 is a specific example. A 25-meter-thick cushioning material made of 64 kg/m3 glass wool mat was laid on the subfloor made of a concrete slab similar to the above, and a 15-meter-thick particle board was pasted on top of this cushioning material through the joists. A floor structure was prepared by laying 12-inch-thick plywood as a floor finishing material.

As Comparative Example 2, a concrete slab with a thickness of 150 m5 was prepared without any floor panel material, cushioning material, or floor finishing material applied.

Figure 5 shows the floor impact sound level for heavy floor impact sound, and Figure 6 shows the floor impact sound level for light floor impact sound based on JI 5-A-1418 and JIS.
-A-1419, the floor impact sound level of the specific example was lower than that of comparative example 1 in both cases of heavy floor impact sound and light floor impact sound. ing. It is presumed that this is because the air pressure in the cushioning material did not increase due to the outflow of air from the vent hole 31 during the floor impact, especially the heavy floor impact sound, and the compression deformation of the cushioning material was performed smoothly.

(Effects of the Invention) As explained above, according to the floor structure according to the present invention, even if an impact force is applied to the upper surface of the floor finishing material, the cushioning material maintains its original impact absorption ability, so the lightweight floor structure It has a high soundproofing effect not only against impact noise but also against heavy floor impact noise. In addition, since the cushioning material is on the floor panel and is not affected by the wood or alkali content in the concrete slab, the shock absorption capacity will not deteriorate even after long-term use.

Furthermore, even if water spilled on the floor finishing material penetrates into the cushioning material, the air in the cushioning material is discharged to the space under the floor panel every time an impact force is applied to the floor, so moisture is also discharged at the same time. This also has the effect of keeping the buffer material dry.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of one embodiment of the floor structure according to the present invention;
The figures are a cross-sectional view showing the action of the floor structure in Figure 1, Figure 3 is a cross-sectional view of a modified example of the floor structure, Figure 4 is a perspective view of another modified example of the floor structure, Figures 5 and FIG. 6 is a graph showing the measurement results of the floor impact sound level, where FIG. 5 shows the case of heavy floor impact sound, and FIG. 6 shows the case of light floor impact sound.
FIGS. 7 to 9 are sectional views of conventional floor structures, respectively. 1... Floor base, 2A... Joist, 2B... Legs, 3
... Floor panel material, 4... Cushioning material, 5... Floor finishing material, 6... Space under floor panel, 31... Ventilation hole. Second

Claims (1)

[Claims] (1) On a subfloor made of a concrete slab, etc., the floor panel material is placed approximately horizontally at an appropriate height via appropriate support members such as joists or legs so as to form a space under the floor panel between the floor panel material and the floor substrate. , and a floor finishing material is placed on the upper surface of the floor panel material with an air-containing breathable cushioning material such as a fibrous cushioning material or an open-cell foamed synthetic resin cushioning material interposed therein. The structure is such that the floor panel material comprises:
From a perforated plate provided with dispersed ventilation holes penetrating in the vertical direction to discharge compressed air in the cushioning material generated when an impact force is applied to the floor finishing material to the space below the floor panel. A floor structure characterized by: