JP2002206303A - Vibration control device for floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control device for a floor having some extent of elasticity for floor dead weight and a line load on the floor and sufficient strength for tension and compression. SOLUTION: This vibration control device for the floor is provided with a beltlike elastic body 1 causing elasticity in the vertical direction only and a damper member 5 capable of absorbing vibration energy in the vertical direction only, and a member constituting the floor of a building can be attached to a horizontal connection section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolator for floors for use in houses and other buildings to enhance the sound insulation of heavy and heavy floors.

[0002]

2. Description of the Related Art In order to reduce the weight impact sound of a floor, which is a problem in a detached house or an apartment house, conventionally, the mass and rigidity of the floor structure have been increased, and the attenuation of the floor structure for propagation noise has been improved. Has been dealt with. For example, the effect of weight is expected in a structure where the floor is integrated using mortar or concrete, such as reinforced concrete (RC) structures, and wooden construction materials have a better damping performance than steel materials, thus reducing the weight impact sound. The effect of has been obtained.

However, in a low-rise apartment building or a single-family house having a small building scale, in order to reduce the burden on the structural drive or to simplify the floor construction itself, a so-called dry type without using mortar or concrete. There are many floors. In such a case, the floor structure has low attenuation to the transmitted sound, and the weight impact sound is easily transmitted from the floor to the beams and columns. Various measures have been taken to reduce this, and floor vibration isolation has been observed. The construction method is also a typical example. For the vibration isolation of the floor, a method is adopted in which the floor slab is elastically supported to reduce the impact applied to the upper floor and to suppress the radiation of sound from the floor. For example, Japanese Patent No. 3015737 discloses a floor structure and its use. There are vibration-absorbing rubber means for floor structures, vibration-absorbing floor panels disclosed in JP-A-8-13641, and high-insulation-type floor panels disclosed in JP-A-10-252200.

[0004]

Conventionally, since the means for reducing floor impact noise relies on mass and rigidity, the following problems have been encountered in low-rise apartment buildings and single-family houses with a small building scale. . Since the floor was heavy, it was a burden on the structural body, and the load was applied not only to the beams but also to the columns and foundations. The thickness of the floor affects the height of the building, which can hinder building planning. Weight is directly linked to construction work, and is reflected in the construction period and costs.

[0005] In addition, in a building having a dry floor structure, there are the following problems. Each member divided by being dry-typed has its own vibration characteristics and easily emits sound at various frequencies, so that the floor impact sound damping performance is reduced. Since the elasticity of the beam influences, there is a difference in the damping performance depending on the position of the floor slab (floor panel) on the beam. In particular, the damping performance of the floor slab over the beam end is extremely poor,
For example, the outer periphery of the building (around the waist) having many beam ends supported by columns is such.

For this reason, floor vibration damping may be adopted as a method of improving performance. The effect of floor cushioning is more remarkable with a softer cushioning support in order to increase the effect on floor impact noise. The likelihood of causing a vibration disorder with a sense of fluttering is also increased. Also, depending on the distribution of the floor's own weight and the state of the load, there is a possibility that the floor will be unevenly displaced so that the floor is not horizontal.

[0007] Therefore, it is necessary to increase the floor's own weight borne by the buffer support portion while suppressing the elasticity of the buffer support portion to some extent, to suppress vibration disturbance due to human walking, and to reduce the displacement due to the loaded load. However, the load (the floor's own weight) that the buffer support portion bears per location increases, and the floor becomes a large panel. Although this can contribute to the simplification of the construction, it is impossible to cope with a fine beam group, so that the degree of freedom of the floor design is lost.

[0008] Adding a softer cushioning support leaves a fundamental problem. In other words, originally, the beam group not only supports the floor's own weight and the load imposed on the floor, but also plays an important role in the horizontal rigidity for bearing the seismic performance of the whole building. Therefore, if the beam set that bears the in-plane rigidity is supported by the elastic body, it is no longer possible to bear a structural role due to the elasticity of the support portion.

In order to solve the above-mentioned problems, the present invention provides an anti-vibration support for the beam itself so as not to cause displacement or vibration obstruction while leaving a degree of freedom of the beam assembly, and to provide in-plane rigidity of the floor horizontal construction surface. The end of the beam is made of an elastic body while retaining the elasticity, and has elasticity only in the vertical direction.It has a certain degree of elasticity against the floor's own weight and the load on the floor, and has sufficient strength against tension and compression. It is an object of the present invention to provide a floor vibration isolator.

[0010]

According to a first aspect of the present invention, there is provided a belt-like elastic body which generates elasticity only in a vertical direction, and a damper member capable of absorbing vibration energy only in a vertical direction. The present invention relates to a vibration damping device for floors, which is attached to a portion where constituent members are horizontally joined, and it is possible to design a vibration damping floor without depriving a degree of freedom in floor design.

According to a second aspect of the present invention, the mechanical strength in the horizontal direction of the elastic band is substantially equal to or higher than the mechanical strength in the horizontal direction of the members constituting the floor of the building. According to the vibration damping device for a floor according to the first aspect, it is possible to secure in-plane rigidity of the floor horizontal construction surface.

According to a third aspect of the present invention, there is provided the floor vibration isolator according to the first aspect, wherein the belt-like elastic body is a plate-like spring, and the damper member is a viscoelastic body. so,
It is possible to provide a compact floor vibration isolator without giving an elasticity only in the vertical direction and increasing the floor height.

According to a fourth aspect of the present invention, a floor of a building and / or
Or, a vibration isolating unit equipped with a band-shaped elastic body that generates elasticity only in the vertical direction and a damper member that can absorb vibration energy only in the vertical direction is attached to a position where the members constituting the ceiling are horizontally coupled. The present invention relates to a floor vibration isolator according to any one of claims 1 or 2 or 3, which has a certain degree of elasticity against the floor's own weight and a loaded load, and does not increase the floor height. In this case, it is possible to provide sufficient strength against tension and compression, and to cope with the complexity of the floor set.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an example of an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the belt-shaped elastic body 1 shown in these figures. The leaf springs 2 and 2 are made to face each other from above and below, and the inner surfaces of both sides of the U-shape are provided with a contact plate 3 so as to have a box shape and have elasticity only in the vertical direction. A plurality of bolt insertion holes 4 are formed in both sides and the contact plate 3.

The damper member 5 fitted into the box-shaped elastic body 1 formed in a box shape faces the webs 7, 7 of two L angles 6, 6 each having an L-shaped horizontal cross section. The webs 7, 7 and the viscoelastic plate 8 are bonded together with the viscoelastic plate 8 interposed between the webs 7, 7. Further, bolt insertion holes 9 are formed in the side plates of the L angles 6 and 6 so as to match the positions of the bolt insertion holes 4 of the band-shaped elastic body 1. Then, the damper member 5 is fitted into the inside of the band-shaped elastic body 1 as shown by the arrow in FIG. 2 to form the vibration isolating unit 10 shown in FIG.

FIG. 3 is a front view showing an attached state of the embodiment shown in FIG. 1, FIG. 4 is a sectional view taken along line IV-IV of FIG. 3, and FIG. 5 is an exploded perspective view showing the attached state of FIG. Then, the vibration isolating units 10 are arranged at both ends of the small beams 11 constituting the floor,
The bolts 12 are inserted through the bolt insertion holes 4 and 9 in FIG. 2, so that both ends of the small beam 11 are fixed to the outer wall side of the building via the vibration isolation unit 10.
Fasten to 4. As a result, the leaf spring 2 (see FIGS. 1 and 2) generates resistance to the horizontal bending stress applied to the end of the small beam 11, and the viscoelastic plate 8 of the damper member 5 mainly resists vertical vibration. It has a damping effect. The elastic coefficient of the vibration isolating unit 10 is determined according to the length of the small beam 11.

By making the mechanical strength of the leaf spring 2 in the horizontal direction substantially equal to or higher than the mechanical strength of the small beams 11 and the large beams 13 constituting the floor of the building, the end portions of the small beams 11 are applied. It has the necessary strength against compressive and tensile stresses and acts as a strength material in the horizontal direction.
The vibration characteristics of the elastic member 1 are alleviated by the vibration isolating unit 10, and the impact on the small beam 11 from the floor is absorbed by the deformation of the elastic band 1. In this way, it is possible to make the elasticity constant with respect to the floor's own weight and the loaded load, and by attaching the vibration isolation unit 10 to the end of the beam 11,
Can be arranged freely, and it is possible to correspond to a fine beam set. The floor's own weight including the small beams 11 and the large beams 13 is much larger than the weight of a person, and is characterized in that floor displacement and vibration disturbance due to walking of a person and the like hardly occur.

FIG. 6 is a front view showing another mounting state of the embodiment shown in FIG. 1, and FIG. 7 is an exploded perspective view showing the mounting state of FIG. Body difference 1
6, a floor support 18 is bolted to a mounting plate 17 provided through the vibration isolating unit 10 including the belt-shaped elastic body 1 and the damper member 5, and a spacer 19 (see FIG. ) Is fixed and the floor 20 is mounted thereon. Since the outer edge of the floor 20 is connected to the pillars and walls, the rigidity of the outer edge of the floor 20 is higher than that of the center of the floor 20, and the heavy shock wave propagates along the outer edge of the floor 20.
When the vibration isolating unit 10 is connected to the outer edge of the floor 20 as shown in FIGS. 6 and 7, the vibration isolating effect is remarkable.

FIG. 8 is a graph showing the sound insulation effect by comparing the sound pressure level of the heavy shock wave between the conventional floor without the vibration isolating unit 10 and the present invention with the vibration isolating unit 10 combined. 30 to 7 important as frequency band of heavy shock wave
It can be seen that the shock wave reduction effect of the present invention at 0 Hz is particularly remarkable.

[0021]

According to the first to fourth aspects of the present invention, the weight impact noise of the floor can be reduced, and the vibration damping means can be adopted without increasing the thickness of the floor and the height of the building. It is also easy and the cost is low.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the embodiment shown in FIG.

FIG. 3 is a front view showing an attached state of the embodiment shown in FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is an exploded perspective view showing an attached state of FIG. 3;

FIG. 6 is a front view showing another mounting state of the embodiment shown in FIG. 1;

FIG. 7 is an exploded perspective view showing an attached state of FIG. 6;

FIG. 8 is a graph showing a sound insulation effect between a conventional floor and the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Band-shaped elastic body 2 Leaf spring 5 Damper member 8 Viscoelastic plate 10 Vibration isolation unit

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Yajima 3-3-5 Umeda, Kita-ku, Osaka-shi, Osaka Daiwa House Industry Co., Ltd. F term (reference) 2E001 DF02 FA71 GA01 HB01 HD00 KA05 KA07 LA15

Claims (4)

[Claims] 1. A belt-like elastic body that generates elasticity only in a vertical direction, and a damper member that can absorb vibration energy only in a vertical direction, and is attached to a position where members constituting a floor of a building are horizontally connected. Characteristic floor vibration isolator. 2. The mechanical strength of the elastic band in the horizontal direction is as follows:
The floor vibration isolator according to claim 1, wherein the mechanical strength in the horizontal direction of the member constituting the floor of the building is substantially the same or higher. 3. The floor vibration isolator according to claim 1, wherein the belt-like elastic body is a plate-like spring, and the damper member is a viscoelastic body. 4. A belt-like elastic body which generates elasticity only in a vertical direction and a damper member which can absorb vibration energy only in a vertical direction are provided at a position where members constituting a floor and / or a ceiling of a building are horizontally connected. 4. The floor vibration isolator according to claim 1, further comprising a vibration isolator unit.