JPS6033974A - Floor base construction method - 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) The present invention provides a method for constructing a subfloor layer by maintaining an appropriate space on a floor slab.
The present invention relates to an improvement in the floor construction method, which is a construction method in which a large number of unit panels are prepared, and these unit panels are laid on a floor slab to construct a subfloor.

[Prior art]

Conventional subfloor construction methods include the so-called large joist construction method, in which large joists and joists are assembled in a lattice pattern on a floor slab, and the other, as shown in Fig. There is a so-called floor construction method in which a large number of unit panels 1 with adjustable supports 1llI13 are prepared and these unit panels 1 are placed side by side on a floor slab 100. As shown in FIG. 2, on the floor subsurface shown in FIG. 1, a lining material 4 is applied, and a finishing material 5 is further applied to complete the floor structure. In the Ohiki joist construction method, flooring materials such as lining materials and finishing materials are constructed on top of the joists to complete the floor structure. When these construction methods are adopted as construction methods for constructing the floor structures of multi-level buildings such as apartment complexes, school classrooms, and upstairs gymnasiums, preventing floor impact sound from being transmitted downstairs becomes an important issue. Of the two construction methods, the floor construction method is superior in terms of floor impact sound insulation. However, even with the floor construction method, fully satisfactory results were not obtained as shown in the following table.

Table The floor structure used in the above experiment consisted of a cushion rubber 6 attached to the lower end of the support leg 3 (see Figure 2), plywood with a thickness of 12 ui as the upholstery material 4, and a plywood with a thickness of 12 ui as the finishing material 5. Floor slab 100 using 11th carpet
The height from the top surface of the finish 425 is 120 cm, and the thickness of the floor slab 100 itself is 120 days.

The table above shows the results of measurements of such floor structures in accordance with the "Method for Measuring Floor Impact Sound Levels at Building Sites" stipulated in JIS A-1418. IL-45 for sound insulation, etc. indicates JIS class 2@, and the living conditions of the apartment complex are ``a little bit careful,'' and L-4.
0 indicates JIS grade 1@, which means that the person can live comfortably. Therefore, L-45 can also be used against heavy impact sources.
The following are desirable.

In addition, the floor structure using the floor construction method shown in FIGS. 1 and 2 also leaves room for improvement in terms of insulation against floor impact noise. Several improvement measures were proposed to improve floor impact sound insulation, but many problems arose with workability on site, and as a result, a subfloor construction method that could be realized most advantageously on site was desired. .

〔the purpose〕

This invention was invented in view of the above circumstances,
It is an object of the present invention to provide a subfloor construction method that has excellent work efficiency on site, has an excellent floor impact sound cut-off after construction, and is advantageous in terms of cost as a sound-insulating floor structure. This is the purpose.

〔composition〕

In order to achieve the above object, the present invention provides a floor substructure by arranging a large number of unit panels on a floor slab, each of which supports a panel board of a predetermined size for vibration isolation with support legs while keeping an appropriate space on the floor slab. This is a subfloor construction method for constructing a subfloor, in which a partitioned space is formed by arranging a large number of joists at appropriate intervals on a large number of panel boards after arranging the unit panels side by side.
Next, a dynamic vibration absorbing material in which a restraining additional mass is attached to the surface of a spring material made of a soft foam material is placed in this divided space, and the surface of the spring material is fixed to the panel board when placing this dynamic vibration absorbing material in the divided space. After that, a lining material was constructed on the joist material so as to maintain an appropriate space from the upper surface of the restrained additional mass.

〔Example〕

A preferred embodiment of the present invention will be described below with reference to the drawings from FIG. After the unit panels 1 are lined up, a large number of joists 7 are placed on a large number of panel boards 2 at appropriate intervals.
are arranged in a row to form a compartment space 8 between these joists 7.

Next, a dynamic vibration absorbing material 9 is placed in the divided space 8 between the joists 7. This dynamic vibration absorbing material 9 is made by attaching a constraint attachment plate 111 to the surface of a spring material 10 made of a soft foam material, and the back surface of the spring material 10 is fixed to the panel board 2. Thereafter, the lining material 4 is installed on the joist material 7 so as to maintain an appropriate space from the upper surface of the restraint additional mass 11.

As the panel board 2 used in the unit panel 1, a particle board with a size of 910n x 910n and a thickness of about 20 to 25n, a particle board with double-sided plywood, etc. are suitable for use, and the support legs 3 are shown in FIG. Attach the receiving fittings 31 to the four corners of the panel board 2, screw the upper ends of the bolts 32 into these receiving fittings 31, screw the lower ends of the bolts 32 to the holes 1 into the receiving fittings 33 provided on the cushion rubber 6, and adjust the horizontal level. It is adjustable and supports the panel board 2 in a vibration-proof manner.

In the illustrated embodiment, the dynamic vibration absorbing material 9 is arranged in a central area A (see FIG. 3) of a floor space where panel boards 2 are arranged side by side, and the panel boards 2 around the central area A are The panel board 2 to which the dynamic vibration absorbing material 9 is fixed is made to have the same height as the top surface of the joist material 7. The height from the floor slab 100 is adjusted to be lower by the thickness of the floor slab.

In this way, applying the dynamic vibration absorbing material 9 only to the central area A is because furniture, etc. are usually placed on the subfloor near the wall, and as a rule of thumb, the area near the wall is an area where people do not engage in activities. This is because the above is obvious. Therefore, in a normal housing complex, it is sufficient to apply the dynamic vibration absorbing material 9 only to the central area A, which has a large influence on the floor impact sound isolation performance, and as a result, economical efficiency is also improved. However, in the case of an upstairs gymnasium, it is desirable to apply the dynamic vibration absorbing material 9 also to the flooring near the walls.

The spring material 10 constituting the dynamic vibration absorbing material 9 is made of, for example, polyurethane foam, polyethylene foam, or PVC foam, etc., with a thickness of 5 to 20 mm, and has a degree of
．． It is desirable to use materials with low spring constants of less than 0.05 o/cm3. - As an example, density 0.045 (1/Cl
Soft tube of R3, size 250
+nX250Ili'1, and when the thickness is changed from 5 to 20 mm, it is most desirable to use a material that changes to %2 within the 2596 compressive strain range. As the restraint additional mass 11, an iron plate, lead sheet, etc. with a thickness of about 1.0 to 4.5 mm is used,
250×250.200X300.300X in advance
400 (unit: inch), etc., is pasted onto the surface of the spring material 10, and is integrated with the spring material 10 at the site and used for construction.

The joists 7 may be arranged in parallel to each other, for example, at a pitch of 300 to 450 cm. In particular, the joists 7 may be arranged parallel to each other at a pitch of 300 to 450 cm. - If the panels are arranged so as to straddle the side edges of the panels 2 (see Fig. 5), a structure will be created in which the panel boards 2 are connected and integrated by the joists 7, and the floor rigidity will be improved. In addition, the panel boards 2 are assembled by assembling the joists 7 in a grid pattern vertically and horizontally.
The dynamic vibration absorbing material 9 may be provided on top, or may be arranged in a rectangular space surrounded by the joists 7 (constituting the partitioned space 8). The thickness of the joist material 7 used is 15 to 30 mm.
It has a width of about 30 to 120 u, and its upper surface is at the same level as the upper surface of the surrounding panel board 2 on which the dynamic vibration absorbing material 9 is not provided.

In addition, when improving floor impact sound insulation, the frequency at which countermeasures should be taken is 31.5 h to 12 h due to the building frame, especially the thickness and aspect ratio of the floor slab 100
Since the frequency range is approximately 57, it is necessary to prepare dynamic vibration absorbing materials 9 for each frequency. Figure 6 (a> to d) shows an example of the dynamic vibration absorbing material 9 for each countermeasure frequency, with a density of 0.02 (approximately +/ mark 3, size 250
Assuming a size of 250 mm and a thickness of approximately 10 mm, a soft urethane foam with a spring constant of approximately 9' x 105%2 in the 25% compressive strain region is used as the spring material, and designed according to the resonance frequency shown in the table below. It is. The soft urethane foam used as the spring material 10 is JIS
A material having a hardness of about 5 ko was used using the K-6401 method.

Notwithstanding the above table, it goes without saying that designs of 50 calm, 80 calm, etc. can be made by selecting a soft urethane foam, etc. In addition, the frequency-specific dynamic vibration absorbing material 9 has a lower frequency range as the rigidity of the floor slab 100 becomes lower, in other words, the slab thickness becomes thinner, and the material is made of concrete with a lower specific gravity (for example, lightweight concrete). There are many cases where countermeasures are required mainly for 31.5 Hz to 631 (z).

Note that the lining material 4 does not need to be a lining material in the precise sense of the word. That is, it goes without saying that a flooring material that should be called a finishing material in an accurate sense can also be used as the member indicated by the reference numeral 4 in FIG. Alternatively, it may be a verticle board, etc., and its name is for convenience, and it can simply be called a flooring material.

〔effect〕

As explained above, the present invention constructs a floor base by arranging a large number of unit panels on a floor slab side by side on which panel boards of a predetermined size are supported with anti-vibration support by support legs while maintaining an appropriate space on the floor slab. This is a subfloor construction method in which a partitioned space is formed by arranging a large number of joists at appropriate intervals on a large number of panel boards after the unit panels are arranged side by side, and then a spring material made of a soft foam material is installed in this partitioned space. A dynamic vibration absorbing material with a restraining material affixed to the surface of the dynamic vibration absorbing material is placed, and the back side of the spring material is fixed to the panel board when arranging the partition space l\ of this dynamic vibration absorbing material, and then restrained on the joist material. A lining material (floor material) is constructed to maintain an appropriate space from the top of the additional mass, and it can be easily constructed to provide floor impact sound insulation performance after construction using the conventional floor construction method. In addition, by simply preparing joists and dynamic vibration absorbing materials for existing subfloors and installing them on panel boards, it is possible to easily and quickly construct a subfloor with floor impact sound blocking performance. Therefore, it is possible to provide a sound-insulating flooring material at low cost.

The subfloor constructed by the construction method of this invention is more susceptible to weight impact sources than the subfloor constructed by the conventional floor construction method.
The measurement results using Tire 90011 (drop method) improved by two ranks in the JIS sound insulation class. The results are as shown in Figure 7, where the symbol X is the measurement result for the subfloor constructed by the conventional floor construction method, and the symbol @Y is the measurement result for the subfloor where dynamic vibration absorbing material was applied only in the central area. , numeral 2 is a subfloor to which dynamic vibration absorbing material is applied over the entire surface. In this experiment, the floor slab had a thickness of 130W and was made of RCII 4m x 5m (7
), and was measured according to the measuring method of JIS A-1418.

In addition, especially in apartment complexes, dynamic vibration absorbing materials are placed in the center area of the floor space made up of juxtaposed panel boards, so that the height of the panel boards around the center area is at the same level as the top surface of the joists. If construction is carried out in this way, it has the advantage that work can be carried out reliably on site, reliability is improved, and it is economical because it is limited to the central area.

Furthermore, when joists are arranged in a row across the side edges of panel boards on the same level (well, the joists connect and integrate the panel boards together, improving floor rigidity, and as a result, blocking floor impact noise. The effect can be further improved.

[Brief explanation of the drawing]

1 and 2 are perspective views showing a subfloor constructed by the conventional floor construction method, FIG. 3 is a perspective view showing a preferred embodiment of the present invention, and FIG. 4 is a plan view of FIG. 3. Figure 5 is a side view, Figures 6 (a) to (d) are perspective views showing each side of the dynamic vibration absorbing material for each countermeasure frequency, and Figure 7 is a conventional flooring and a flooring constructed according to the present invention. 3 is a graph showing the results of a comparative experiment on floor impact sound blocking effect with 1... Unit panel, 2... Panel board, 3... Support leg, 4... Thread material, 7... Joist material , 8...Division space, 9...Dynamic vibration absorbing material, 10...Spring material, 11...Restriction additional mass. Applicant Brideston Tire Co., Ltd. Agent Patent Attorney Masu 1) Takeo

Claims (1)

[Scope of Claims] 1. A floor base constructed by arranging a large number of unit panels on a floor slab side by side on a floor slab, in which a panel board of a predetermined size is supported in vibration isolation with support legs while maintaining an appropriate space on the floor slab. This is a construction method in which a partitioned space is formed by arranging a large number of joists at appropriate intervals on a large number of panel boards after unit panels are placed side by side, and then the surface of a spring material made of a soft foam material is installed in this partitioned space. A dynamic vibration absorbing material to which a restrained additional mass is attached is placed, and when placing this dynamic vibration absorbing material in the compartment space, the back side of the spring material is fixed to the panel board, and then the restrained additional mass is placed on the joist material from the top surface. A subfloor construction method characterized by the construction of pickled materials to maintain appropriate space. 2. The dynamic vibration absorbing material was placed in the center area of the floor space constituted by the panel boards arranged side by side, and the height of the panel boards around the center area was constructed to be at the same level as the top surface of the joists. A subfloor construction method according to claim 1, characterized in that: 3. The subfloor construction method according to claim 1 or 2, characterized in that the joists are arranged in a row so as to straddle the side edges of panel boards on the same level.