JPS59173456A - Sound blocking floor material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a flooring material with a sound insulating function for apartment complexes, detached houses, etc., and particularly to a sound insulating flooring material suitable for use as a subfloor material. It is.

[Prior art]

Conventional flooring materials, for example flooring materials for subfloors, consist of a subfloor base made by assembling large timbers and joists in a lattice pattern on a floor slab, and several boards are laminated on top of this subfloor base. What has been done is well known. With the flooring material on the subfloor base of the Ohiki joist construction method, floor impact noise caused by children jumping on the upper floors, etc., becomes a problem on the lower floors in multi-story buildings, especially floor impact noise in the low frequency range. Improvements were desired.

Therefore, as shown in Fig. 1, we have prepared a large number of unit panels 102, which are panel boards 100 of a predetermined size and support legs 101 whose horizontal level can be adjusted, as flooring material for subfloors in housing complexes, gymnasiums, etc. , these unit panels 102
A system in which these are placed side by side on the floor slab 103 has come to be widely used. The sound insulation effect is enhanced by attaching vibration isolating rubber 104 to the lower end of the support leg 101 used here. A lining material (not shown) is installed on the unit panel 102, and a finishing material (not shown) is applied on the lining material to complete the floor structure.

A floor slab 103 was created using plywood with a thickness of 12 mm as the covering material and carpet with a thickness of 11 m++ as the finishing material.
The height from to the top of the finishing material is 120mm, and the floor slab is 1
03 with a thickness of 120 cm is JIS A-141
The results of the measurements were as shown in Table 1 below, in accordance with the "Method for Measuring Floor Impact Sound Levels at Building Sites" stipulated in Section 8.

Table 1 In addition, the correspondence between the sound insulation grade of floor impact noise and the actual living experience is shown in Table 2 below.

Table 2 In addition, in the wooden floor structure of the large joist type, the denier measured by a weight impact source was about L-65 to 71 in terms of sound insulation grade. Compared to this large joist type, unit panel 102
A significant improvement is seen in those using .

Even in a floor structure using unit panels that improves floor impact sound isolation performance in this way, the central part of the panel board 100, whose four corners are usually supported by four support legs 101, butts against the adjacent panel boards 100. There is a large difference in rigidity between the joints and directly above the support leg 101, making it unavoidable that the rigidity of the entire flooring material is uneven.
The relative balance against weight impacts, such as those caused by overturning of objects or overturning of equipment, is poor, and when an impact is applied to a location with low floor rigidity, bending vibration spreads throughout the floor, causing a deterioration in floor impact sound isolation performance. It had become. In such a floor structure, the unit panels 102 adjacent to the unit panels 102 that received the weight impact undergo relative movement that appears to be a reaction to the impact.
1251-IZ and lower, leading to a decrease in the shielding performance in the low frequency range below 1251-IZ. In addition, bending vibration due to weight impact leads to an increase in the sound pressure level at the lower middle of the unit panel 102, and so-called transmitted sound propagating directly to the downstairs is also caused by such a floor structure.

[Purpose of the invention]

This invention was invented in view of the above circumstances,
The object of the present invention is to provide a sound insulating flooring material that has improved sound insulation function, particularly in a low frequency range.

(Structure of the Invention) This invention arranges a plurality of spacers between a plurality of plate members to form a compartment area surrounded by the plate members and the spacer members, and in this compartment, a spring member made of a soft material and a spring member made of a soft material and a spring member made of a soft material A dynamic vibration absorbing material composed of a constrained additional mass made of a steel plate or the like is attached to one side of a spring material, and only the other side of the spring material of this dynamic vibration absorbing material is fixed to either the upper or lower plate material. This aims to achieve the above objectives.

[Embodiments of the invention]

Preferred embodiments of the present invention will be described below with reference to FIG. 2 and the subsequent drawings.

In the embodiment shown in FIG. 2, there are a plurality of spacers 2 between two plate members 1, 1, and in the illustrated example, seven spacers 2 are arranged parallel to each other and at equal intervals. . . . are arranged to form a partitioned area S surrounded by the plate materials 1 and 1 and the space materials 2 . Dynamic vibration absorbing materials 3 are arranged in these divided areas S. As shown in FIG. 3, this dynamic vibration absorbing material 3 consists of a spring material 4 made of a soft material such as polyurethane foam, and a restraining force 5 made of a steel plate or the like stuck to one side of the spring material 4. It consists of: The spring I44 may be made of polyurethane foam, rubber, polyethylene foam, PVC (polyvinyl chloride) foam, etc., and has a thickness of about 5 to 20 mm and a density of 0.0
Materials with low bouncing constants below 5 g/cm' are preferred. -For example, when the density is 0.045g/cm3 and the thickness is changed from 5 to 20 dragons, the spring constant is 11 x 105
More preferred is a material that can be changed to H///l/hill 2 to 4×10 ≠/. The additional restraint capacity 5 is a steel plate with a thickness of about 1.0 to 4.5 cm and a density of 1.5 g/cm3 or more, a lead sheet, a vibration damping rubber sheet, or a sheet made of vinyl chloride with an inorganic filler added. The thickness is 5.
It may also be a slate board of about 20 inches+. Since the dynamic vibration absorbing material 3 composed of the spring material 4 and the restraint addition layer 5 functions as a dynamic damper, the other side of the spring material 4 (the surface to which the restraint addition amount 5 is pasted) (the opposite side) to either the upper or lower plate U1. The plate material 1 has a thickness of about 5.5 to 12 mm and a size of 910 x 910 mm, 1910 x 1820 mm, and 1200 mm.
Use plywood or vertical board such as X2400 construction.

In addition, in the case of a flooring material installed on a subfloor constructed by the Ohiki joist method, the interval between the division areas S is made to correspond to the pitch of 300 um or 450 TIIll, which is the pitch of the Ohiki joist method. Furthermore, the arrangement of the space materials 2 does not necessarily have to be parallel, and the space materials 2 may be arranged in a grid pattern.
It may be held in between.

The combination of the spring material 4 and the restraining force 5 in the dynamic vibration absorbing material 3 can be designed according to the frequency at which impact noise is expected to be reduced, and its basic formula is the vibration system formula of degrees of freedom.
” - Determined by morale. In the formula, M is the mass of the restraint additional mass 5, K
is the spring constant of the spring material 3. - As an example, when reducing 63H2, polyurethane foam with a density of 0.02 p/cm' and a thickness of 14 parts was compressed by 50% to a thickness of 7 mm, and a 3.2 order iron plate was attached to the surface. . As shown in FIG. 4, the flooring material equipped with the dynamic vibration absorbing material 3 configured in this way is installed in the subfloor using the large joist construction method using the large joists 10 and joist materials 20, so that children can easily jump up and down, etc. Impact caused by
Even when plate vibration was caused by the addition of the vibration absorbing material 3, a damping effect was obtained over a wide range of frequencies around the design frequency due to the dynamic damper effect of the dynamic vibration absorbing material 3. In this case, it is possible to set the design frequency to several frequencies and apply them to one flooring material, and in the example shown in FIG. 4, the area of the spring material 4 disposed in each section S is changed. In the example shown in FIG. 4, the thickness of the floor slab 103 is 130T1m, and the thickness is 20T1m.
When replacing the open verticle board floor subboard with a board material 1.1 with a thickness of 9, the above-mentioned dynamic vibration absorbing material 3, and a floor material with a design frequency of 63 H2, the downstairs resistance to weight impact sources according to JIS △-1418 The floor collision! Sound A is 7 at 63 Hz.
d B (C), 5 dB (C) at 125 Hz, 25
A sound reduction effect of 2d B (C) was obtained at 01-1z and 500')lz. In addition, the reference numeral 30 in FIG. 4 is a layer of lining material and finishing material.

Note that the thickness of the dynamic vibration absorbing material 3 needs to be equal to or lower than the height of the partitioned area S to keep the restraint addition amount 5 in a free state. Further, the dynamic vibration absorbing material 3 may be attached to either the upper or lower plate material 1, and contrary to the illustrated embodiment, the dynamic vibration absorbing material 3 may be attached to a Y in which the restraint addition amount 5 is suspended from above via the spring material 4. It may be configured.

Further, the flooring material according to the present invention may be used instead of the panel board 1oo shown in FIG. 1, or the flooring material according to the present invention may be laid on the unit panel 102 shown in FIG. The floor material shown in FIG. 1 is used instead of the panel board 1oo of the unit panel 102 shown in FIG.
(see Figure (C)), a conventional unit panel 102 and a layer 30 of lining material and finishing material in which a foam material 4o is simply sandwiched (see Figure 5 (b)), and a conventional unit panel 102 (see Figure 5 (b)), The floor construction method shown in Figure 5 (a)) was compared in terms of high floor impact blocking performance. The results are as shown in FIG. 6. The example of the present invention shown in FIG. 5(C) has a sound insulation grade of L-51, and the one shown in FIG.
, the one not shown in Figure (a) was L-58. The comparison data shown in FIG. 6 is data measured by a weight impact source (tire drop).

〔Effect of the invention〕

As explained above, according to the present invention, 1. Since a dynamic vibration absorbing material having a dynamic damper effect is provided inside the flooring material, as a result, as shown in the graph of FIG. 6, the sound insulation properties in the low frequency range are significantly improved. In addition, the present invention not only can be easily used in construction regardless of whether it is a new construction or renovation of an apartment complex or a single-family house, but also can be carried out easily and quickly on-site.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional floor construction method, Fig. 2 is a partially cutaway perspective view showing a preferred embodiment of the present invention, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 2, The figure is a sectional view showing an example of application to the Ohiki joist method, Figure 5 <a> or C) is a front view showing an experimental sample, (C) is an embodiment of the present invention, and Figure 6 is a 5 It is a graph in which the floor impact sound insulation performance was measured using each of the samples shown in Figures (A > to C). 1...Plate material, 2...Space material,
3...Dynamic vibration absorbing material, 4...Spring material, 5.
...Restricted additional mass. Applicant Brideston Tire Co., Ltd. Agent Patent Attorney Masu 1) Takeo

Claims (1)

[Claims] 1. A plurality of spacers are arranged between a plurality of plate materials to form a compartment area surrounded by the plate members and the spacer material, and a spring material made of a soft material and a spring material on one side of the spring material are placed in this compartment area. Sound insulation characterized by arranging a dynamic vibration absorbing material made of bonded steel plates, etc. or a constrained additional mass, and fixing only one side of the spring material of this dynamic vibration absorbing material to either the upper or lower plate material. flooring.