JP5639766B2 - Floor structure - Google Patents

Description

  The present invention relates to a floor structure.

  In the floor structure of a building, in order to improve the sound insulation performance and vibration isolation performance, it is called a so-called double floor structure in which floor materials are arranged at intervals above a floor support such as a slab via support legs. There is something.

  As one of this kind of double floor structure, in Patent Documents 1 and 2 below, a plurality of support legs (double floor struts) are erected on a floor support (slab), and between the upper ends of the support legs. The floor material (floor panel) is laid so as to hang over, and the dynamic vibration absorber elastic body (elastic body) having spring characteristics in the vertical direction and the dynamic vibration absorption supported by the dynamic vibration absorber elastic body on the support leg The thing to which the dynamic vibration absorber which consists of a container mass body (additional mass) was attached is proposed.

In Patent Document 1, a cushion rubber (first elastic body) and a cushion pedestal (second elastic body) are arranged in series, and a finishing material, a surface material of a base panel, a panel holder, a support bolt, It is a structure that is supported by the cushion pedestal via an elastic support, and the cushion pedestal absorbs vibration from the flooring by moving up and down so that the mass pedestal elastically absorbs vibration, and is further damped. The structure in which the vibration is attenuated by the cushion rubber and transmitted to the floor slab is disclosed.
Patent Document 2 discloses a structure in which, in the structure of Patent Document 1 described above, a recess is provided at the center of a cylindrical mass body, and an elastic body is disposed in the recess.
Further, Patent Document 3 discloses a floor structure in which a supporting elastic body and a dynamic vibration absorber are separately arranged, unlike Patent Documents 1 and 2 described above.

JP 2007-40093 A JP 2009-174160 A JP 2008-180073 A

However, the conventional floor structure has the following problems.
That is, in Patent Document 1, since the first elastic body, the second elastic body, and the mass body are arranged in series, the separation distance between the floor support and the flooring material becomes long, and the floor below In some cases, it could not be applied when the height was limited.
Patent Document 2 can reduce the floor by the amount of a hollow provided in the center of the mass body, but the first elastic body, the second elastic body, and the mass body as in Patent Document 1 Are arranged in series, which is an obstacle to lowering the floor.

  Moreover, in the case of the floor structure of patent document 3, since the support elastic body and the dynamic vibration absorber are arrange | positioned separately, compared with patent document 1, 2, it is advantageous to a floor reduction. However, the supporting elastic body is usually connected to the receiving material and the dynamic vibration absorber is connected to the base panel. However, one base panel is very large, and a dynamic vibration absorber equipped with a mass body is attached to it. In addition, since the assembly work such as transportation and alignment takes time and effort, improvement in workability is required, and there is room for improvement in that respect.

The present invention has been made in view of the above-described problems, and can reduce the separation distance between the floor support and the flooring material. Also, even when renovation is performed, the floor support and the flooring material can be reduced. An object of the present invention is to provide a floor structure in which the restriction of the separation distance between the two is reduced.
Another object of the present invention is to provide a floor structure that can be reduced in weight and can be easily constructed by assembling a support member and a dynamic vibration absorber to a receiving member in advance.

In order to achieve the above object, in the floor structure according to the present invention, the floor support and the floor support are disposed above the floor support with a space with respect to the floor support , and are spread over the base panel and the base panel. and floor covering that consists of a fixed finishing material, arranged on the floor support, a support member for supporting the flooring through the first elastic member elastically deformable, at least one around the support member A dynamic vibration absorber that is provided and attenuates vibration transmitted from the floor material to the floor support through the support member by vibrating the first mass body by elastic deformation of the second elastic body having the first mass body; The support member and the dynamic vibration absorber are arranged with a space therebetween, and a receiving material made of a highly rigid material whose plate surface is fixed along the lower surface of the base panel is provided.

In the present invention, when the floor material vibrates for some reason, the vibration of the floor material in the vicinity of the support member is attenuated by the dynamic vibration absorber via the receiving material. That is, the vibration of the flooring material is transmitted to the second elastic body through the receiving material and elastically deforms, and the first mass body moves up and down so as to absorb the vibration, thereby attenuating the vibration. For this reason, vibration and sound transmitted from the floor material to the floor support through the receiving material and the support member are also reduced.
Since the support member and the dynamic vibration absorber are arranged in parallel with each other, the floor support and the floor material are separated from each other as compared with a floor structure in which the support member and the dynamic vibration absorber are arranged in series. The distance can be shortened, and the floor structure can be lowered. Therefore, in the case of remodeling, construction can be performed even when the separation distance between the floor support and the flooring material can ensure only a relatively short value.
In addition, since the support member and the dynamic vibration absorber can be assembled in advance to the receiving material, and the weight can be reduced, the assembly work of the dynamic vibration absorber at this time is supported on a floor material having a large shape and a large weight as in the past. There is an advantage that it becomes much easier than the case of assembling a member or a dynamic vibration absorber.

In the floor structure according to the present invention, the first elastic body of the support member is preferably provided with a second mass body, and the first mass body and the second mass body preferably have different masses.
In the present invention, the masses of the first mass body and the second mass body are changed, or when a plurality of dynamic vibration absorbers are provided, the masses of the respective second mass bodies are changed, whereby a plurality of frequency regions are obtained. Therefore, the sound insulation effect can be further enhanced.

In the floor structure according to the present invention, it is preferable that a plurality of dynamic vibration absorbers are provided, and the second elastic bodies have different spring constants.
In the present invention, by changing the spring constants of the second elastic bodies of the plurality of dynamic vibration absorbers, it is possible to deal with a plurality of frequency regions and to further enhance the sound insulation effect.

In the floor structure according to the present invention, the support member is provided with the third elastic body having the second mass body on the first elastic body, and the second mass body is displaced by the elastic deformation of the third elastic body. Thus, the vibration may be attenuated.
Thereby, when the height between a floor support body and a flooring can be taken comparatively large, a 1st elastic body and a 3rd elastic body can be arranged in series with respect to a support member. In this case, the vibration of the floor material is transmitted to the third elastic body via the receiving material and elastically deformed, and the second mass body moves up and down so as to absorb the vibration, so that the vibration is attenuated. Good vibration damping characteristics can be obtained, and the sound insulation effect can be further enhanced.

In the floor structure according to the present invention, the support member has a support bolt for supporting the first elastic body from the receiving material, and the receiving material is provided with an internal thread portion for screwing the support bolt. It is preferable.
In the present invention, since the support bolt of the support member is screwed to the female thread portion of the receiving material, it is easy to assemble the supporting member to the receiving material in advance before construction on site, so that the construction is simplified. Can be achieved.

In the floor structure according to the present invention, it is preferable that the support member is integrally connected to the support member in a state in which a support column supporting the second elastic body of the dynamic vibration absorber on the lower end side is suspended.
In the present invention, by attaching the second elastic body having the first mass body to the support column provided integrally with the receiving material, the dynamic vibration absorber is assembled in advance to the receiving material before construction on site. Therefore, construction can be simplified.

According to the floor structure of the present invention, since the support member and the dynamic vibration absorber are separated and arranged in parallel, the separation distance between the floor support and the flooring material can be shortened. The floor can be lowered. Therefore, even when reforming is performed, the limitation on the separation distance between the floor support and the flooring can be reduced.
Further, by assembling the support member and the dynamic vibration absorber to the receiving material in advance, the weight can be reduced and construction can be easily performed.

It is a bottom view which shows the floor structure by the 1st Embodiment of this invention. It is sectional drawing which looked at the principal part of the floor structure shown in FIG. 1 from the side. It is a bottom view of the principal part of the floor structure shown in FIG. It is principal part sectional drawing shown in FIG. It is principal part sectional drawing shown in FIG. It is a sectional side view which shows the floor structure by 2nd Embodiment, Comprising: It is a figure corresponding to FIG. It is side sectional drawing which shows the structure of the receiving material by a modification.

  Hereinafter, a floor structure according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
As shown in FIGS. 1 and 2, the floor structure according to the first embodiment is a double floor structure mainly used in an apartment house such as a condominium. The floor is emitted from the upper floor and is transmitted downstairs. This reduces the impact sound and vibration.

In these drawings, reference numeral 1 denotes a slab (floor support). Above the slab 1, the flooring 2 is disposed with a space from the slab 1. The flooring 2 is composed of a base panel 3 and a finishing material 4 that is laid and fixed on the upper side of the base panel 3. Between the slab 1 and the base panel 3, support legs 10 (support members) and a plurality (two in this case) of dynamic vibration absorbers 20 are fixed to the base panel 3 via receiving members 30. A plurality of combinations (support leg structures 5) composed of the support legs 10, the dynamic vibration absorbers 20, and the receiving members 30 are arranged evenly with respect to the plurality of base panels 3.
And the support leg 10 is arrange | positioned at the receiving material 30 so that it may become the position of the joint part 3a of the base panel 3 by planar view, and the dynamic vibration absorber 20 is arrange | positioned adjacent to the vicinity position of the support leg 10. FIG.

  As shown in FIGS. 2 to 4, the support leg 10 elastically supports the flooring 2 via an elastic member. Specifically, the support leg 10 has a truncated cone-shaped support elastic body 11 (first elastic body) disposed on the slab 1, and a connecting plate 11 a on the upper surface of the support elastic body 11. And a mounting bolt 13 for fixing the support bolt 12 to the receiving member 30. The mounting bracket 13 is fixed to the receiving member 30 by appropriate fixing means (not shown). A support bolt 12 is fixed to the mounting bracket 13 by a joining means such as welding or caulking.

  As shown in FIGS. 2, 3 and 5, the dynamic vibration absorber 20 is provided separately from the support leg 10, and vibrates (including sound) transmitted from the floor material 2 to the slab 1 through the support leg 10. Attenuate. Specifically, the dynamic vibration absorber 20 is attached so that support bolts 22 (posts) constituting the dynamic vibration absorber column are suspended via an attachment plate 21 attached to the lower surface 30 a of the receiving member 30. A support plate 23 is attached to the lower end of the support bolt 22, and the lower end of the dynamic vibration absorber elastic body 24 (second elastic body) formed in a ring shape is fixed and supported by the support plate 23.

A weight 25 (first mass body) made of a metal material such as iron is attached to the upper end of the dynamic vibration absorber elastic body 24 through a connecting plate 24a by appropriate fixing means such as adhesion. The weight 25 is formed in a ring shape having a larger diameter than that of the dynamic vibration absorber elastic body 24 as a whole, and a through hole 25a through which the support bolt 22 is inserted is formed at the center. A recess 25b for accommodating the elastic body 24 is formed. The upper surface of the dynamic vibration absorber elastic body 24 is attached to the ceiling surface of the recess 25b as appropriate by a fixing means in a state where the upper surface of the dynamic vibration absorber elastic body 24 is in contact with the connection plate 24a. At this time, a predetermined clearance C (FIG. 5) is formed between the upper end of the weight 25 and the lower surface 30a of the receiving member 30, and the weight 25 is vibrated in the vertical direction within the range of the clearance C. ing.
Thus, the weight 25 is supported by the dynamic vibration absorber elastic body 24 in a mounted state, and a compressive force is applied to the dynamic vibration absorber elastic body 24. Since an elastic body such as rubber is usually more resistant to compression than tension, the reliability and durability of the dynamic vibration absorber elastic body 24 can be improved.

  The receiving material 30 including the support leg 10 and the dynamic vibration absorber 20 is for widely supporting a predetermined portion of the lower surface of the base panel 3 by the support leg 10. The receiving member 30 is made of a material having high rigidity such as an iron steel material, for example, and one side is a supporting leg 10 or a mounting member for a plurality of dynamic vibration absorbers 20 (a mounting bracket 13 and a mounting plate 23 described later). Is set to a range that can be attached, and is made of a plate material having a quadrangular shape in plan view. Note that the shape of the receiving member 30 is not limited to a quadrangular shape in plan view, and may be a polygon other than a quadrangular shape such as a pentagonal shape, and may be a circular shape or an elliptical shape.

Next, the effect | action of the floor structure of the said structure is demonstrated based on drawing.
In the present floor structure, when the flooring 2 vibrates for some reason, the vibration of the flooring 2 is attenuated by the supporting elastic body 11 via the receiving member 30 and further to the slab 1 via the supporting leg 10. It is transmitted. At this time, a pair of dynamic vibration absorbers 20, 20 are arranged in the vicinity of the support leg 10, and the weight 25 of these dynamic vibration absorbers 20 cancels the vibration of the flooring 2 via the dynamic vibration absorber elastic body 24. The vibration of the flooring 2 in the vicinity of the support leg 10 is attenuated by vibrating in the vertical direction. As a result, vibrations including sound transmitted from the receiving member 30 to the slab 1 via the support legs 10 can be reduced, and good vibration damping characteristics can be obtained.

Here, since the support leg 10 and the dynamic vibration absorber 20 are arranged in parallel with each other, the slab 1 is compared with a conventional floor structure in which the support leg and the dynamic vibration absorber are arranged in series. The distance between the floor material 2 and the flooring 2 can be shortened, and the floor structure can be lowered.
In the first embodiment, since the minimum underfloor dimension N ₀ (FIG. 2) can be reduced, when renovating, the separation distance between the slab 1 and the floor material 2, that is, the underfloor minimum dimension N ₀ is relatively small. Even if only a short value can be taken, construction is possible.
Further, since the support leg 10 and the dynamic vibration absorber 20 can be assembled to the receiving member 30 in advance, and the weight can be reduced, the assembling operation of the dynamic vibration absorber 20 at this time is a floor having a large shape and a large weight as in the prior art. It is much easier than installing support legs and dynamic vibration absorbers on the material.

In addition, by changing the mass of each of the weights 25 and 25 of the pair of dynamic vibration absorbers 20 and 20 provided on the receiving member 30, it is possible to deal with a plurality of frequency regions and further enhance the sound insulation effect. Is possible.
Furthermore, the dynamic vibration absorber 20 has a basic configuration in which the weight 25 is suspended and supported by the dynamic vibration absorber elastic body 24 whose upper end is attached to the lower surface of the floor 2 below. It is possible to simplify the configuration of itself.
In addition, it can respond also by changing the spring constant of the dynamic vibration absorber elastic bodies 24 and 24 of a pair of dynamic vibration absorbers 20 and 20 in order to respond | correspond to a several frequency area | region.

As described above, in the floor structure according to the first embodiment, since the support customer 10 and the dynamic vibration absorber 20 are separated and arranged in parallel, the separation distance between the slab 1 and the flooring 2 is shortened. The floor structure can be reduced. Therefore, even when reforming is performed, the limitation on the separation distance between the slab 1 and the flooring 2 can be reduced.
Moreover, by attaching the support leg 10 and the dynamic vibration absorber 20 to the receiving material 30 beforehand, weight reduction can be achieved and it can construct easily.

  Next, other embodiments and modifications according to the floor structure of the present invention will be described with reference to the accompanying drawings. The same reference numerals are used for members and parts that are the same as or similar to those of the first embodiment described above. A description will be omitted, and a configuration different from that of the embodiment will be described.

(Second Embodiment)
As shown in FIG. 6, the floor structure according to the second embodiment includes a second dynamic vibration absorber elastic body 15 (having a weight 14 (second mass body) above the support elastic body 11 in the support leg 10. The third elastic body) is provided on the support bolt 12, and the weight 14 is displaced by the elastic deformation of the second dynamic vibration absorber elastic body 15 so that the vibration is attenuated.
The second dynamic vibration absorber elastic body 15 and the weight 14 have the same configuration as the dynamic vibration absorber elastic body 24 and the weight 25 of the dynamic vibration absorber 20, respectively. The second dynamic vibration absorber elastic body 15 has a support plate 16 fixed to the lower surface thereof fixed to the connection plate 11a of the support elastic body 11 by appropriate connection means. At this time, the weight 25 of the dynamic vibration absorber 20 and the weight 14 of the support leg 10 are arranged so as not to interfere with each other.

  The floor structure according to the second embodiment configured as described above is effective when the height between the slab 1 and the flooring 2 can be made relatively large. The body 11 and the second dynamic vibration absorber elastic body 15 can be arranged in series. In this case, the vibration of the flooring 2 is transmitted to the second dynamic vibration absorber elastic body 15 via the receiving member 30 and elastically deformed, and the vibration is attenuated by moving up and down so that the weight 14 absorbs the vibration. Also in the support leg 10, a favorable vibration damping characteristic can be obtained, and the sound insulation effect can be further enhanced.

  In the second embodiment, it is also possible to change the masses of the weight 14 of the support leg 10 and the weight 25 of the dynamic vibration absorber 20, thereby supporting a plurality of frequency regions, It is possible to further enhance the sound insulation effect.

(Modification)
As shown in FIG. 7, the receiving member 30 according to the modification is provided with a female thread portion 31 for screwing the support bolt 12 of the support leg 10, and the dynamic vibration absorber elastic body 24 of the dynamic vibration absorber 20 is disposed at the lower end side. The supporting bolts 22 (supports) to be supported are integrally connected in a suspended state (see FIG. 2). The female screw portion 31 is formed with a female screw 31 a for screwing the support bolt 12 into the inner peripheral surface of a circular hole that penetrates the receiving member 30 in the thickness direction.

  As described above, in the modified example, the support bolt 12 of the support leg 10 is screwed into the female thread portion 31 of the receiving material 30, and the weight 25 of the dynamic vibration absorber 20 is connected to the support bolt 22 provided integrally with the receiving material 30. By attaching the dynamic vibration absorber elastic body 24 provided with the structure, the support leg 10 and the dynamic vibration absorber 20 can be easily assembled in advance to the receiving material 30 before construction at the site, thereby simplifying the construction. Can be planned.

As mentioned above, although embodiment of the floor structure by this invention was described, this invention is not limited to said embodiment, It can change suitably in the range which does not deviate from the meaning.
For example, in the present embodiment, the support leg 10 and the two dynamic vibration absorbers 20 are provided for the receiving material 30, but the number of the dynamic vibration absorbers 20 is limited to two. However, it may be arranged in parallel to the support leg 10, and may be one or three or more. That is, the number of the dynamic vibration absorbers 20 may be appropriately determined according to the setting target of the sound insulation effect based on the vibration condition of the flooring 2, the thickness dimension of the flooring 2, and the like.

The configuration of the support elastic body 11, the weight 14, the second dynamic vibration absorber elastic body 15, the dynamic vibration absorber elastic body 24 of the dynamic vibration absorber 20, the weight 25, and the like are described above. The present invention is not limited to the embodiment described above and can be set as appropriate.
Furthermore, the receiving material 30 is not limited to the configurations of the above-described embodiments and modifications, and receiving materials having other shapes may be used.
In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-described embodiments may be appropriately combined.

1 Slab (floor support)
2 Floor material 3 Base panel 4 Finishing material 5 Support leg structure 10 Support leg (support member)
11 Elastic body for support (first elastic body)
12 Support Bolt 13 Mounting Bracket 14 Weight (Second Mass)
15 Second dynamic vibration absorber elastic body (third elastic body)
20 Dynamic vibration absorber 21 Mounting plate 22 Support bolt (support)
23 support plate 24 dynamic vibration absorber elastic body (second elastic body)
25 weight (first mass)
25b Recess 30 Receiving material 31 Female thread

Claims (6)

A floor support;
Spaced relative to the bed support above the floor support and floor covering which is laid on the upper side of the base panel and the lower fabric panel Ru is configured from a fixed finishing material, said bed support A support member disposed above and supporting the flooring material via a first elastic body capable of elastic deformation;
At least one is provided around the support member, and vibrations transmitted from the floor material to the floor support through the support member are caused by elastic deformation of the second elastic body having the first mass body. A dynamic absorber that attenuates the mass body by vibrating,
The support member and the dynamic vibration absorber are arranged at intervals, and a receiving material made of a highly rigid material whose plate surface is fixed along the lower surface of the base panel ;
A floor structure characterized by comprising: The first elastic body of the support member is provided with a second mass body,
The floor structure according to claim 1, wherein the first mass body and the second mass body have different masses. The support member is provided with a third elastic body having the second mass body above the first elastic body, and the second mass body is displaced by elastic deformation of the third elastic body to attenuate vibrations. The floor structure according to claim 2 , wherein the floor structure is configured as described above. A plurality of the dynamic vibration absorbers are provided,
The floor structure according to any one of claims 1 to 3 , wherein each of the second elastic bodies has a different spring constant . The support member has a support bolt for supporting the first elastic body from the receiving material,
The floor structure according to any one of claims 1 to 4, wherein the receiving member is provided with a female screw portion for screwing the support bolt.   The said receiving material is integrally connected in the state which the support | pillar which supports the 2nd elastic body of the said dynamic vibration damper on a lower end side hangs down. Floor structure.

Images