JP2023104623A - Unit panel and vibration isolation floor structure - Google Patents

Abstract

To provide a vibration isolation floor structure that can be made into a simple structure by applying a unit panel suitable for low flooring and improving floor impact noise isolation.SOLUTION: A vibration isolation floor structure 10 to solve the above problem employs a unit panel 18 and has a joist 16 and vibration isolating material 14 under the joist 16, the unit panel 18 having a thin-walled portion 18c with a concave back surface, the thin-walled portion 18c being wide enough to allow the insertion and contact of the upper part of the joist 16 on a floor slab 12 and disposed in accordance with the spacing between the joists 16 arranged at predetermined intervals.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a vibration-isolating floor structure, and more particularly to a unit panel suitable for lowering the floor while ensuring soundproof performance, and a vibration-isolating floor structure using this unit panel.

Of the so-called double floors, the anti-vibration floating floor is generally a wet type with high anti-vibration performance, and is not suitable for renovations and conversions because it uses water when placing concrete. On the other hand, dry floating floors, such as those disclosed in Patent Document 1 and Patent Document 2, which support joists via support legs and arrange panel members on top of these joists, are There is a drawback that the floor height is increased because the boards constituting the panel member are laminated.

Furthermore, as disclosed in Patent Document 3, a double-floor structure has been proposed to improve workability, vibration isolation, and soundproof performance. In the double floor structure disclosed in Patent Document 3, a vibration isolator is arranged at the bottom of a support pillar as a support leg, and the pillar is attached to a bracket fixed to a connecting member arranged at the bottom of the underfloor material. are screwed together to facilitate height adjustment of the panel member, and to suppress the transmission of vibration and impact noise to the floor slab. In addition, in the panel member, the rigidity of the entire panel member is increased by arranging an intermediate laying member having a higher rigidity and a higher specific gravity than the underfloor member above the underfloor member, thereby reducing the thickness of the entire panel member. there is

However, in the double-floor structure disclosed in Patent Document 3, a connection member for fixing a bracket to which a post is screwed is arranged under the underfloor material, and vibration isolation is provided below the post. Since it is a structure in which materials are arranged, it is difficult to lower the floor compared to the conventional double-floor structure, and there is a problem that the number of constituent members increases.

Japanese Patent Application Laid-Open No. 2001-279912 JP-A-2005-290708 Japanese Patent No. 6571343

Therefore, in the present invention, the above problem is solved, and a unit panel suitable for lowering the floor, and a vibration-proof floor structure that can improve floor impact sound insulation by applying this unit panel and can be a simple structure. intended to provide

A unit panel according to the present invention for achieving the above object is a unit panel used for a floor joist, the unit panel having a thin portion with a concave back surface, the thin portion being a floor slab. It has a width that allows the upper part of the joist placed thereon to intervene and come into contact with the joist, and is arranged in accordance with the intervals between the joists that are arranged at predetermined intervals.

Moreover, the unit panel having the characteristics described above is preferably constructed by joining a front plate and one or more back plates, and the thin portion is constructed by notching the back plate. With such characteristics, the thin portion can be formed more easily than by cutting the thickness of one plate.

Furthermore, in the unit panel having the characteristics described above, it is desirable that the front plate and/or the back plate are made of particle board. By having such characteristics, it is possible to improve the degree of freedom in the thickness and size of the unit panel, as well as the workability.

Further, a vibration-damping floor structure according to the present invention for achieving the above object is a unit panel having any one of the characteristics described above, a joist arranged on the lower surface of the unit panel, and a floor joist arranged below the joist. It is characterized by comprising a vibration-proof material.

Furthermore, in the vibration-isolating floor structure having the characteristics described above, it is desirable that a recess capable of accommodating at least a portion of the vibration-isolating material is formed in the lower surface of the joist. With such features, it is possible to reduce the height from the surface of the floor slab to the surface of the unit panel, compared to the case where the vibration-damping material is generally placed under the floor joists.

According to the unit panel having the above characteristics and the anti-vibration floor structure to which this unit panel is applied, it is possible to lower the double floor and simplify the structure while improving the floor impact sound insulation. can be planned.

It is a sectional view showing the composition of the anti-vibration floor structure concerning an embodiment. It is an exploded cross-sectional view for explaining the details of the anti-vibration floor structure according to the embodiment. It is a figure for comparing the anti-vibration floor structure which used the unit panel of the conventional structure, and a floor joist, and the anti-vibration floor structure which concerns on embodiment. It is a figure which shows the structure of the vibration-proof floor structure at the time of arrange|positioning a damping material to the joist of the conventional structure, and arrange|positioning the unit panel which concerns on embodiment on the upper part of a joist. FIG. 10 is a diagram showing an example of a test device for examining the state of transmission of floor impact sound to a downstairs area; 7 is a graph for explaining the effect of reducing floor impact noise; 1 is a diagram showing an example of a test apparatus for investigating the transmission of impulsive sound, which includes irregular test chambers 1 and 2. FIG. 7 is a graph for comparing and explaining the floor impact noise reduction effect of the anti-vibration floor structure according to the embodiment and the dry double floor structure according to Cited Document 3. FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a unit panel and an anti-vibration floor structure of the present invention will be described in detail with reference to the drawings. It should be noted that the embodiments shown below are part of preferred modes for carrying out the present invention, and even if part of the configuration is changed, as long as the same effect can be achieved, it is one part of the present invention. shall be considered as a department.

[composition]
First, the basic structure of the anti-vibration floor structure 10 according to the present embodiment will be described with reference to FIGS. 1 and 2, and then details of the characteristic structure will be described. The anti-vibration floor structure 10 according to this embodiment includes joists 16 arranged at predetermined intervals on a floor slab 12 constituting a floor of an apartment house, a hotel, an office, etc., and the joists 16 arranged above the joists 16. It is configured based on the unit panel 18 .

The floor joist 16 according to the present embodiment has a recess 16 a formed on the lower surface, that is, the surface facing the floor slab 12 . A vibration isolator 14 is arranged between the floor slab 12 and the floor joists 16 . The vibration-isolating material 14 may be a leaf spring, special foamed urethane, rubber, or the like, but is not limited to these as long as vibration-isolating properties can be obtained. In addition, by housing a part of the vibration-isolating material 14 in the recessed portion 16a formed on the lower surface of the joist 16, the height of the joist 16 (height from the floor slab 12 to the upper surface of the joist 16) having a vibration-isolating action can be reduced. can be suppressed. Here, the depth of the recess 16a may be determined according to the structure and height of the vibration-isolating material 14. After accommodating a part of the vibration-isolating material 14, It is sufficient that a gap is formed between them to provide a vibration damping effect. Note that the recessed portion 16a may be provided continuously along the longitudinal direction of the joist 16 (the joist 16 shown in FIGS. 1 and 2 shows a cross section in a direction intersecting the longitudinal direction), but the vibration isolator 14 may be provided in a spot shape according to the intervals of arranging the .

The unit panel 18 is configured to have a predetermined thickness (for example, about 40 mm) in order to ensure strength, sound insulation, and the like. In this embodiment, a thin portion 18c is provided to form a concave defect on the back surface of the unit panel 18. As shown in FIG. The thin portion 18c is provided in accordance with the arrangement interval of the joists 16 arranged on the floor slab 12, so that at least the upper portion of the joist 16 can be interposed and the upper portion can be brought into contact with the ceiling portion of the thin portion 18c. have width. In such a configuration, the strength of the thin portion 18c (strength in the bending direction with respect to the surface) is borne by the joists 16. As shown in FIG. Therefore, while the height from the floor slab 12 to the surface of the unit panel 18 is suppressed, the unit panel 18 as a whole can ensure a predetermined strength.

Further, in this embodiment, the unit panel 18 is configured by laminating (joining) a plurality of plate materials. Specifically, it is configured by joining a front plate 18a and one or more back plates 18b (in the example shown in FIGS. 1 and 2, one back plate 18b is used), and is thin. The portion 18c is formed by cutting out the back plate 18b. In this embodiment, at least a part of the plate materials that constitute the front plate 18a and the back plate 18b are made of particle board. This is because, by using a particle board as the plate material, the degree of freedom in selecting the thickness and size is increased, and workability can be improved. In addition, since the unit panel 18 can be configured simply by joining a plurality of particle boards (two in the example shown in FIGS. 1 and 2), the configuration of the unit panel 18 can be simplified.

In general, a surface layer material 20 such as flooring is arranged on the surface of the unit panel 18, that is, the surface of the top plate 18a. Alternatively, if a decorative particle board is used, the surface layer material 20 is not required, and the floor height of the anti-vibration floor structure 10 constituting the double floor can be further reduced.

[Action/Effect]
According to the anti-vibration floor structure 10 (structure (C) in FIG. 3) configured as described above, the conventional unit panel 28 (in the example shown in FIG. 3, a structure in which two particle boards are stacked) and the conventional Compared with the structure (structure (A) in FIG. 3) in which the floor joists 26 are laminated and the vibration-isolating material 14 is arranged below them (structure (A) in FIG. 3), the floor can be lowered by h1. In addition, compared to the conventional structure combining the unit panel 28, the joist 16 provided with the recess 16a, and the vibration-proof material 14 (structure (B) in FIG. 3), it is possible to lower the floor by h2. can. As shown in FIG. 4, even in a vibration-isolating floor structure in which the unit panel 18 according to the embodiment is arranged on the conventional joist 26 and the vibration-isolating material 14, the conventional structure (FIG. 3 (A ) can be made lower than the structure shown in ).

Further, when the anti-vibration floor structure 10 according to the embodiment was subjected to a detection test of impact noise echoing downstairs using a test apparatus 30 as shown in FIG. 5, the results shown in FIG. 6 were obtained. . The scale of the vertical axis of the graph shown in FIG. 6 is the value (dB) indicating the amount of reduction in floor impact sound level after construction of the anti-vibration floor relative to the result of the frame test before construction of the anti-vibration floor, and the scale of the horizontal axis. is a value (Hz) indicating the octave band center frequency of the impact sound. Considering FIG. 6, the reduction amount in the 63 Hz band of the determining frequency of the heavy floor impact sound level class is plus 4 dB. A high vibration isolation effect is obtained in spite of the type. Here, the test apparatus 30 arranges the frame pillars 36 on the foundation 32 via the vibration-isolating material 34, arranges the floor slabs 38, 40 constituting the floor between the frame pillars 36 vertically, and A structure such as a wall 42 is arranged in an area corresponding to the floor located at , and a microphone 44 for detecting impact sound and a vibration pickup means 46 are installed. In addition, on the floor slab 40, which is an element corresponding to the upper floor, various anti-vibration floor structures are arranged, and then a light impact source 48 and a heavy impact source 50 are arranged.

Next, the vibration-isolating floor structure 10 according to the embodiment is tested by a test apparatus 31 as shown in FIG. A sound detection test was conducted, and the results shown in FIG. 8 were obtained. Here, the test was conducted under the same conditions for the dry double bed structure disclosed in Patent Document 3 as well.

The scale of the vertical axis of the graph shown in FIG. 8 is the value (dB) indicating the amount of reduction in floor impact sound level after construction of the anti-vibration floor with respect to the CLT test result before construction of the anti-vibration floor, and the scale of the horizontal axis. is a value (Hz) indicating the octave band center frequency of the impact sound.

Referring to FIG. 8, it can be read that the anti-vibration floor structure 10 according to the present embodiment can significantly reduce noise in the entire frequency band from 63 Hz to 4000 Hz compared to the CLT frame floor. can. In addition, even when compared with a dry double floor structure as disclosed in Patent Document 3, it is possible to achieve equal or higher noise reduction, and when the center frequency band is 125 Hz or more, Patent Document 3 It can be read that a large reduction in noise can be achieved compared to the disclosed dry double floor structure. Here, the test apparatus 31 is composed of irregular test chambers 1 and 2 made of concrete with walls, floors, and ceilings. there is A CLT floor structure is constructed in the opening to separate test chambers 1 and 2. After installing a vibration-isolating floor or the like on the CLT floor structure, a light shock source 48, a heavy shock source 50, and a microphone 44 are placed in test chamber 2. This makes it possible to measure the performance of various floor structures.

Therefore, according to the anti-vibration floor structure 10 according to the present embodiment, the unit panel 18 can have a simple structure, and the double floor can be lowered. Furthermore, the transmission of impact noise to the downstairs area can be greatly suppressed compared to the conventional system, and noise reduction (improved floor impact noise isolation) can be achieved.

In the above-described embodiment, the unit panel 18 is mainly configured by layering particle boards. However, the unit panel 18 that constitutes the anti-vibration floor structure 10 according to the present invention may be formed by forming a thin portion 18c by recessing the back surface of one plate material, or by joining plate materials other than particle board. You can configure

10 Vibration-proof floor structure 12 Floor slab 14 Vibration-proof material 16 Joist 16a Recessed portion 18 Unit panel 18a Surface board 18b Back plate 18c Thin portion 20 Surface layer material 26 Joist 28 Unit panel 30, 31 Testing device 32 Foundation 34 Vibration isolator, 36 Building column, 38, 40 Floor slab, 42 Wall, 44 Microphone, 46 Vibration pick-up means, 48 Lightweight shock source , 50 . . . weight impact source.

Claims (5)

A unit panel used for a joist floor,
The unit panel has a thin portion with a concave back surface,
The thin portion has a width that allows the upper part of the floor joist placed on the floor slab to intervene and come into contact with the floor joist, and is arranged in accordance with the space between the joists placed at a predetermined interval. A unit panel characterized by The unit panel is configured by joining a front plate and one or more back plates,
2. The unit panel according to claim 1, wherein the thin portion is formed by notching the back plate. 3. The unit panel according to claim 2, wherein the front plate and/or the back plate are made of particle board. A unit panel according to any one of claims 1 to 3;
a joist arranged on the lower surface of the unit panel;
and a vibration-isolating material placed under the joists. 5. The anti-vibration floor structure according to claim 4, wherein a recessed portion capable of accommodating at least part of said anti-vibration material is formed in the lower surface of said joist.

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