JP2009084861A - Floor structure and floor construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor structure which exerts high vibration control efficiency, and to provide a floor construction method. <P>SOLUTION: According to the floor structure, a floor face material is supported by a plurality of floor beams 3, 6 which each have vibration control devices 10 arranged therein. Out of the floor beams 3, 6, the long floor beam 3 which has a beam length of not smaller than a predetermined dimension (2,727 mm), has the vibration control devices 10 arranged at locations that are 1/4 span away from respective edges, while the short floor beam 6 which has a beam length shorter than the predetermined dimension (2,727 mm) has the vibration control device 10 arranged at the center thereof. In this manner irrespective of the length of the floor beams 3, 6, the vibration control devices 10 are arranged on antinodes of vibrations, and therefore vibration control action is effectively exerted to the entire floor surface. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a floor structure in which a vibration control device is provided on a floor beam and a floor construction method for constructing the floor structure.

Conventionally, a floor structure in which a floor material is supported by a plurality of floor beams is often used. This floor structure is known to have a vibration control device so as not to transmit noise and vibration on the floor, for example, noise and vibration of children jumping downstairs.
As a floor structure equipped with a vibration control device, brackets are provided across the bottom and both sides of the beam attached to the bottom surface of the floor material, and dynamic dampers are attached to both sides of the bracket via rubber parts. There is an example (patent document 1).

  This patent document 1 has a structure in which a vibration damping device is attached to some of the plurality of small beams constituting the floor. This damping device is attached to the central part of the beam.

Japanese Unexamined Patent Publication No. 2004-3280 (FIGS. 1 and 2)

The conventional example shown in Patent Document 1 has a structure in which a vibration damping device is attached to a part of a plurality of small beams constituting the floor. Therefore, the floor portion and the vibration damping device that can be controlled by the vibration damping device Will be mixed with the part of the floor that cannot be damped due to the non-working.
Further, since the vibration damping device is attached to the central part of the beam regardless of the length of the small beam, the vibration damping effect is not always sufficient when the small beam is long.
Therefore, in the conventional example, there is a problem that the vibration damping action does not work efficiently on the entire surface of the floor.

  An object of the present invention is to provide a floor structure and a floor construction method with high vibration damping efficiency.

Referring to the accompanying drawings, the floor structure of the present invention supports floor materials 5 and 8 with a plurality of floor beams 3 and 6, and a vibration damping device 10 is provided on each of the floor beams 3 and 6, respectively. The long floor beam 3 in which the beam length of the plurality of floor beams 3 and 6 is equal to or greater than a predetermined dimension is provided with the vibration damping device 10 at a position of 1/4 span from the edge thereof, and The short floor beam 6 whose beam length is shorter than the dimension is provided with the vibration damping device 10 at the center thereof.
Here, the predetermined length is, for example, 2727 mm (9 scales).

In the invention of this configuration, since the vibration control device is provided on all of the plurality of floor beams, there is no floor beam on which the vibration control device is not provided, and a portion where the vibration control device works and a portion where the vibration control device does not work are mixed on the floor. Disappears.
In addition, when the floor beam is short, the vibration of the floor beam is in the central portion, so that the damping action acts on the portion of the floor. In the case where the floor beam is long, the vibration of the floor beam is at 1/4 span from both ends. Therefore, regardless of the length of the floor beam, a vibration damping device is provided on the vibration antinode.
Therefore, the present invention can provide a floor structure with high vibration damping efficiency because the vibration damping action works efficiently on the entire floor surface.

In the present invention, the vibration damping device includes a bracket 11 attached to a side surface of the floor beam, and a vibration control unit main body 12 attached to the bracket 11, and the bracket 11 moves vertically on the side surface of the floor beam. It is preferable that the angle member has one side portion 11 </ b> A arranged extending in the direction and the other side portion 11 </ b> B arranged so as to extend substantially horizontally with the vibration damping main body attached to the upper portion.
In the invention with this configuration, since the damping unit main body is attached to the side surface of the floor beam via the bracket, the damping device can be attached without protruding the bracket downward from the lower edge of the floor beam.
Therefore, since it is not necessary to project the bracket for attaching the damping part main body from the lower end of the floor beam, even if the space between the floor and the member located below, for example, the ceiling part of the lower floor is narrow, A damping device can be attached.

It is preferable that a pair of the vibration damping devices are provided with the floor beams interposed therebetween, and the brackets and the floor beams respectively provided in these vibration damping devices are connected by a connector.
In the invention of this configuration, when the vibration control device is provided on both side surfaces of the floor beam, the brackets that are opposed to each other with the floor beam interposed therebetween are connected by a connecting tool such as a bolt or a nut. Since it is not necessary to project the beam from the lower end edge of the beam, the vibration damping device can be attached even if the space between the floor and the member located below the space is narrow.

Moreover, the structure by which the floor panel is comprised including the said long floor beam, the said short floor beam, and the said floor surface material is preferable.
In the invention of this configuration, since the floor structure is composed of floor panels, the vibration damping device can be attached at the factory, so that construction at the site can be easily performed.

Further, a plurality of the floor panels are arranged side by side in contact with the side surfaces of the long floor beams arranged on the outside thereof, and the edge of the long floor beam at a portion where these floor panels are joined to each other It is preferable that the panel plate connecting portion 100 is provided at a position of ¼ span from each other, and the panel connecting portion damping device is provided on the center side from the panel plate connecting portion.
In the invention of this configuration, since the panel coupling damping device is provided so as not to interfere with the coupling position between the floor panels, the damping effect can be enhanced while maintaining the coupling strength of the floor panels.

Furthermore, it is preferable that the panel connecting portion damping device is disposed closer to the panel plate connecting portion than the center position between the edges of the long floor beam.
In the invention with this configuration, since the vibration damping device for panel connection portion is disposed closer to the inter-panel plate connection portion than the panel center position, the vibration damping effect can be increased.

The panel connecting portion damping device is provided with a pair of long floor beams arranged in contact with each other, and a bracket attached to each side surface of the long floor beam, and the bracket attached to the bracket. It is preferable that the structure includes a vibration control unit main body and the brackets provided in a pair are connected to each other by bolts via the long floor beam.
In the invention of this configuration, the number of parts can be reduced by making the vibration damping device and the panel coupling vibration damping device the same structure, and the floor panels can be connected not only between the panel coupling vibration damping devices with bolts. Can also be connected, so that the connecting strength of the floor panel can be increased.

In the floor construction method of the present invention, a plurality of floor beams are attached to floor materials in a factory, vibration control devices are attached to these floor beams, and the floor beams are transported to the construction site and then installed on the site. It is characterized by.
In the invention of this configuration, since the vibration damping device can be attached to the floor beam with high accuracy in the factory, the floor to which the vibration damping device is attached can be easily constructed on site.

Embodiments of the present invention will be described below with reference to the drawings. Here, in description of each embodiment, the same component is attached | subjected with the same code | symbol, and description is abbreviate | omitted or simplified.
1 to 4 show a first embodiment. FIG. 1 is a plan view of a floor according to the first embodiment.
FIG. 1 shows a plane of a floor in a house or other building. The building may be single-storey or multi-storey. In a multi-storey building, the floor structure applied in the present embodiment may be a lower floor or an upper floor.
The floor of the present embodiment is configured by arranging a plurality of long floor panels 1 and short floor panels 2 side by side.

FIG. 2 shows a long floor panel 1. 2A is a plan view of the long floor panel 1, and FIG. 2B is a schematic diagram illustrating a vibration state in the long floor panel 1.
In FIG. 2A, a long floor panel 1 includes a plurality of floor beams 3 in the figure, a frame body 4 that joins ends of the floor beams 3, and the floor beams 3. And a floor surface material 5 attached to the upper surface of the frame body 4. In addition, the material which comprises these floor panels 1, for example, the floor beam 3, the frame 4, and the floor surface material 5, does not ask | require the material. For example, all or a part thereof may be formed from a woody material, may be formed from a metal, or may be formed from a synthetic resin.
The floor beams 3 are arranged in parallel to each other, and are each a long floor beam having a beam length of 2727 mm (9 scales) or more. The long floor beam 3 is formed from wood and has a substantially rectangular cross section. The floor beam 3 in the present embodiment is a concept including not only the floor beam itself constituting the frame material of the panel but also the joist and the small beam.

The side surface of the frame body 4 is joined to the end of the floor beam 3, and has the same cross-sectional shape as the floor beam 3. The frame 4 is formed of the same material as the floor beam 3. The floor beam 3 and the frame 4 are joined to each other by an adhesive, a nail, or the like.
The floor surface material 5 is formed in a planar rectangular shape, and includes a particle board as a base material and a sound insulating flooring laminated on the particle board.
As shown in FIG. 2 (B), the vibration P in the longitudinal direction of the floor beam 3 is divided into nodes at the end and the position of 1/2 span, and the position of the 1/4 span from the end is antinode. It is said.
In the present embodiment, the vibration damping device 10 is provided at a position of 1/4 span from the end of the floor beam 3 corresponding to the vibration antinode.

FIG. 3 shows a short floor panel 2. 3A is a plan view of the short floor panel 2, and FIG. 3B is a schematic diagram illustrating a vibration state in the short floor panel 2.
In FIG. 3A, a short floor panel 2 includes a plurality of floor beams 6 in the figure, a frame body 7 that joins ends of the floor beams 6, and the floor beams 6. And a floor surface material 8 attached to the upper surface of the frame body 7.
The floor beams 6 are arranged in parallel to each other, and each is a short floor beam having a beam length of less than 2727 mm (9 scales). The short floor beam 6 is made of wood and has a substantially rectangular cross section as the long floor beam 3.

The side surface of the frame body 7 is joined to the end portion of the floor beam 6, and has the same cross-sectional shape as the floor beam 6. The frame 7 is made of the same material as the floor beam 6. The floor beam 6 and the frame 7 are joined to each other by an adhesive, a nail, or the like.
The floor surface material 8 is formed in a planar rectangular shape, and is configured to include a particle board and flooring in the same manner as the floor surface material 5.
As shown in FIG. 3B, both ends of the vibration P in the longitudinal direction of the floor beam 6 are nodes, and the center (position of 1/2 span from the end) is antinode.
In the present embodiment, the vibration damping device 10 is provided at a position (center portion) of ½ span from the end of the floor beam 6 corresponding to the vibration antinode.

The configuration of the vibration damping device 10 is shown in FIG. FIG. 4 is a front view showing a state in which the vibration damping device 10 is attached to the side surfaces of the floor beams 3 and 6.
In FIG. 4, the vibration damping device 10 includes a bracket 11 that is attached to the side surfaces of the floor beams 3 and 6, and a vibration damping body 12 that is attached to the bracket 11.
The bracket 11 is an angle having one side portion 11A arranged to extend vertically on the side surfaces of the floor beams 3 and 6, and the other side portion 11B arranged with the vibration damping body 12 attached to the upper part and extending substantially horizontally. It is a material. The bracket 11 made of this angle material is formed by bending a metal piece.
One side 11 </ b> A of the bracket 11 is attached to the floor beams 3 and 6 with screws 13.

The vibration control unit main body 12 includes a plate 16 joined to the upper surface of one side 11A of the bracket 11 with bolts 14 and nuts 15, an elastic member 17 provided on the plate 16, and an elastic member 17 on the elastic member 17. And a weight 18 provided to suppress vibrations from the floor panels 1 and 2 using the elastic member 17 and the weight 18.
A pin 19 is erected on the plate 16 at a position away from the elastic member 17.
The elastic member 17 is formed in a substantially cylindrical shape or a prismatic shape from rubber or other elastic materials.
An engagement piece 18A is formed at the lower end of the weight 18, and an engagement hole (not shown) through which the pin 19 is inserted is formed in the engagement piece 18A. This prevents the weight 18 from being detached from the elastic member 17 due to vibration.

A method of constructing the floor structure having the above configuration will be described.
[Floor panel manufacturing process]
First, floor panels 1 and 2 are manufactured at a factory.
A plurality of floor beams 3 and a frame 4 are combined, and a floor material 5 is attached to the upper surfaces of the floor beams 3 and the frame 4 to produce a long floor panel 1. The damping device 10 is attached to the position of the span of 1/4 from the both ends of the floor beam 3 of the floor panel 1. In the vibration damping device 10, the vibration damping body 12 is attached to the other side 11 </ b> B of the bracket 11 in advance, and one side 11 </ b> A of the bracket 11 is brought into contact with the side surface of the floor beam 3 and fixed with screws 13. .
Similarly, a plurality of floor beams 6 and a frame body 7 are combined, and a floor material 8 is attached to the upper surfaces of these floor beams 6 and the frame body 7 to manufacture a short floor panel 2. The vibration damping device 10 is attached to the position (center portion) of ½ span from both ends of the floor beam 6 of the floor panel 2.
[Floor panel construction process]
The floor panels 1 and 2 with vibration control devices manufactured at the factory are transported to the site by truck, and the floor panels 1 and 2 are arranged side by side at the site.
Adjacent floor panels 1, 2 are joined together in the same manner as before.

Therefore, in the first embodiment, the following operational effects can be achieved.
(1) Since the vibration damping device 10 is provided on all of the plurality of floor beams 3 and 6, there is no floor beam on which the vibration damping device 10 is not provided, and a vibration damping effect can be generated on the entire floor without unevenness.
(2) In the short floor beam 6 shorter than 9 meters, the vibration control device 10 is provided at the center of the floor beam 6, and in the long floor beam 3 longer than 9 meters, 1 is respectively provided from both ends of the floor beam 3. Since the damping device 10 is provided at each of the / 4 spans, the damping device 10 is provided at the antinode portion of the vibration regardless of the length of the floor beams 3 and 6. Therefore, the vibration damping action works efficiently on the entire floor surface, and the vibration damping efficiency can be increased.

(3) At the factory, a plurality of floor beams 3 and 6 are attached to the floor materials 5 and 8, and the vibration control devices 10 are attached to these floor beams 3 and 6, respectively. After transportation, the floor was constructed by construction on site. Therefore, since the vibration damping device 10 can be attached to the floor beams 3 and 6 with high accuracy at the factory, the vibration damping device 10 can be easily installed on the floor simply by constructing the floor.
(4) Since the floor panels 1 and 2 are configured to include the floor beams 3 and 6 provided with the vibration control device 10, and the floor is constructed by arranging these floor panels 1 and 2 at the construction site, The vibration device 10 can be installed on the site simply by arranging the floor panels 1 and 2.

(5) The vibration damping device 10 includes a bracket 11 attached to the side surfaces of the floor beams 3 and 6, and a vibration control unit body 12 attached to the bracket 11, and the bracket 11 is a side surface of the floor beams 3 and 6. An angle member having one side portion 11A arranged so as to extend vertically and the other side portion 11B attached to the upper part and arranged substantially horizontally is provided. Therefore, since the vibration damping device 10 can be attached even if the bracket 11 does not protrude downward from the lower edge of the floor beams 3 and 6, even if the space between the floor and the member located below it is narrow, vibration damping is possible. The device 10 can be easily attached.

Next, a second embodiment of the present invention will be described with reference to FIGS.
The second embodiment is different from the first embodiment in that the vibration damping device 10 is disposed opposite to each other with both side surfaces of the floor beams 3 and 6 interposed therebetween, and the other configuration is the same as that of the first embodiment.
The second embodiment is applied to the floor corresponding to FIG. 1 as in the first embodiment, and this floor is constructed by arranging a long floor panel 1 and a short floor panel 2 side by side.
FIG. 5 shows a floor panel 1 according to the second embodiment, wherein (A) is a plan view of the long floor panel 1 and (B) is a schematic diagram showing a vibration state in the long floor panel 1. FIG.

In FIG. 5 (A), the long floor panel 1 is comprised including the floor beam 3, the frame 4, and the floor surface material 5 similarly to the floor panel 1 of 1st Embodiment.
As shown in FIG. 5 (B), the vibration P in the longitudinal direction of the floor beam 3 is divided into a node at its end and a position of 1/2 span, and a position of 1/4 span from the end is an antinode. It is said.
Also in the second embodiment, as in the first embodiment, the vibration damping device 10 is provided at a position of ¼ span from the end of the floor beam 3 corresponding to the antinode of vibration. Unlike the above, the vibration control devices 10 are arranged opposite to each other with the floor beam 3 arranged in the center portion interposed therebetween.
FIG. 6 is a front view showing a state in which the vibration damping device is attached to the side surface of the floor beam.
In FIG. 6, these vibration damping devices 10 have one side 11 </ b> A of the bracket 11 connected to each other by a connector 20. The connecting tool 20 is composed of, for example, a bolt 21 and a nut 22, and the bolt 21 is inserted into a through hole (not shown) formed in the floor beams 3 and 6.
The mounting structure of the vibration damping device 10 on the short floor panel 2 is the same as that shown in FIG.
The floor construction method of the second embodiment is the same as that of the first embodiment.

In the second embodiment, the same operational effects as (1) to (5) of the first embodiment can be achieved, and the following operational effects can be achieved.
(6) A pair of vibration damping devices 10 are provided across the floor beams 3 and 6, and the bracket 11 and the floor beams 3 and 6 respectively provided on these vibration damping devices 10 are connected by bolts 21 and nuts 22. Since the vibration damping device 10 can be attached without connecting the connecting tool 20 downward from the lower end edges of the floor beams 3 and 6, the connecting member 20 is connected to the floor, and the member positioned below the floor Even if the space is narrow, the vibration damping device 10 can be easily attached.

Next, a third embodiment of the present invention will be described with reference to FIG.
In the third embodiment, the shapes of the floor beams 3 and 6 to which the vibration damping device 10 is attached are different from those of the first embodiment, and other configurations are the same as those of the first embodiment.
The third embodiment is applied to the floor corresponding to FIG. 1 as in the first embodiment, and this floor is constructed by arranging a long floor panel 1 and a short floor panel 2 side by side.

FIG. 7 is a front view showing a state in which the vibration damping device 10 is attached to the side surfaces of the floor beams 3 and 6.
In FIG. 7, the floor beams 3 and 6 have a mounting piece 9 bonded to the lower end of the side surface. The mounting piece 9 is formed in a rectangular shape in cross section, and a damping part main body 12 is provided on the side surface and the upper surface via a bracket 11.
The bracket 11 has a substantially right angle having a side portion 11A arranged vertically extending on the side surface of the mounting piece 9 and a side portion 11B arranged substantially horizontally extending with the vibration damping body 12 attached to the upper portion. It is a material. The corners of the bracket 11 are engaged with the corners of the mounting piece 9.

In the third embodiment, the nut 15 is embedded in the mounting piece 9, and the bolt 14 penetrating the other side portion 11 </ b> B of the bracket 11 and the plate 16 is screwed into the nut 15.
In the third embodiment, as in the second embodiment, it is possible to employ a configuration in which the vibration damping devices 10 are arranged to face each other on both side surfaces of the floor beams 3 and 6.

Therefore, in the third embodiment, the following operational effects can be obtained in addition to the operational effects of the first and second embodiments.
(7) Since the bracket 11 of the vibration damping device 10 is configured to engage with the attachment piece 9 provided on the floor beams 3 and 6, the vibration damping body 12 is supported even if the vibration damping body 12 is heavy. Since the bracket 11 to be opened does not open, the vibration damping device 10 can function with high accuracy.

Next, a fourth embodiment of the present invention will be described with reference to FIGS.
FIG. 8A is a schematic diagram showing a vibration state in the floor structure of the fourth embodiment, FIG. 8B is a plan view of the floor structure, and FIG. 9 is taken along line IX-IX in FIG. It is arrow sectional drawing.
8 and 9, the fourth embodiment is different from the first embodiment in that a panel connecting portion damping device 10 is provided on a long floor beam in contact with adjacent floor panels 1. The same as in the first embodiment.
In the second embodiment, a plurality of floor panels 1 (three in FIG. 8) are arranged side by side in contact with the side surfaces of the long floor beams 3 arranged on the outside, and these floor panels 1 are joined together. The panel board connection part 100 is provided in the position of 1/4 span from the edge of the long floor beam of the part to carry out, respectively. This panel board connection part 100 is connecting tools, such as a volt | bolt, for example.
The panel connecting portion damping device 10 of the present embodiment is closer to the panel center than the panel connecting portion 100, but is closer to the panel connecting portion 100 than the center position between the edges of the long floor beam 3. Has been placed.

The panel connecting portion damping device 10 has the same structure as the damping device 10 shown in FIG.
Specifically, the panel connecting portion damping device 10 is provided with a pair of sandwiched long floor beams 3 arranged in contact with each other, and brackets 11 attached to the side surfaces of the long floor beams 3, respectively. A vibration damping unit main body 12 attached to the bracket 11 is provided.
A pair of brackets 11 are connected and fixed to each other by bolts 21 via the long floor beam 3.

Therefore, according to the fourth embodiment, the following operational effects different from those of the first to third embodiments can be achieved.
(8) Since the panel coupling damping device 10 is provided so as not to interfere with the panel-plate coupling portion 100 that is the coupling position of the floor panels 1, the damping effect is high while maintaining the coupling strength of the floor panel 1. Can be.
(9) Since the vibration damping device 10 for the panel connecting portion is disposed closer to the panel plate connecting portion 100 than the center position between the edges of the long floor beam 3, the vibration damping effect can be increased.

(10) Since the vibration damping device 10 for panel connecting portion has the same structure as the vibration damping device 10 shown in FIG. 6, the number of parts can be reduced.
(11) Since not only the panel coupling damping devices 10 but also the floor panels 1 are coupled by the bolts 21, the coupling strength of the floor panel 1 can be increased together with the panel inter-plate coupling unit 100.
That is, in the fourth embodiment, the primary vibration mode P ₁ and the secondary vibration mode P ₂ occur when the beam length is equal to or longer than a predetermined length, for example, 2727 mm (9 scales), but the panel plate connecting portion disposed 100 from the vibration damping device provided on the panel center side 10 to the portion near the antinode of the vibration of the first vibration mode P _1, antinodes of the vibration device 10 provided in the multi-beam is secondary vibration mode P ₂ It is possible to take measures against two vibration modes at the same time. In addition, by using one type of vibration damping device 10, it is possible to achieve cost reduction while ensuring a desired vibration damping effect.
In addition, in 4th Embodiment, it is good also as a structure which abbreviate | omits the panel board connection part 100 and connects the floor panels 1 with the volt | bolt 21. FIG.

Note that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope in which the object of the present invention can be achieved are included in the present invention.
For example, in the said embodiment, although it was set as the structure which attached the damping device 10 to the floor panels 1 and 2 previously, in this invention, it is good also as a structure which attaches the damping device 10 after constructing a floor beam on the spot.

  The present invention can be used for a floor of a building that requires vibration control.

The top view of the floor concerning a 1st embodiment of the present invention. (A) is a top view of a long floor panel, (B) is a schematic diagram which shows the vibration state in a long floor panel. (A) is a top view of a short-sized floor panel, (B) is a schematic diagram which shows the vibration state in a short-sized floor panel. The front view which shows the state with which the damping device was attached to the side surface of a floor beam. (A) is a top view of the short floor panel concerning 2nd Embodiment of this invention, (B) is a schematic diagram which shows the vibration state in a short floor panel. The front view which shows the state with which the damping device was attached to the side surface of a floor beam. The front view which shows the state by which the damping device concerning 3rd Embodiment of this invention was attached to the side surface of a floor beam. (A) is a schematic diagram which shows the vibration state in the floor structure concerning 4th Embodiment of this invention, (B) is a top view of a floor structure. FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Long floor panel, 2 ... Short floor panel, 3 ... Long floor beam, 6 ... Short floor beam, 9 ... Mounting piece, 10 ... Damping device, Damping device for panel connection part 11 ... Bracket, 11A ... One side, 11B ... Other side, 12 ... Damping body, 17 ... Elastic member, 18 ... Weight, 20 ... Connecting tool

Claims (9)

While supporting the floor material with a plurality of floor beams, each of these floor beams is provided with a vibration control device,
The long floor beam in which the beam length of the plurality of floor beams is a predetermined dimension or more is provided with the vibration control device at a position of 1/4 span from the end edge thereof, and the beam length is shorter than the predetermined dimension. A floor structure characterized in that the vibration damping device is provided at the center of the short floor beam. In the floor structure according to claim 1,
The vibration damping device includes a bracket that is attached to a side surface of the floor beam, and a vibration control unit body that is attached to the bracket, and the bracket is arranged on one side portion that extends vertically on the side surface of the floor beam. And a floor structure, characterized in that the damping body is attached to an upper part and is an angle member having the other side part extending substantially horizontally. In the floor structure according to claim 2,
A floor structure characterized in that a pair of the vibration damping devices are provided across the floor beams, and the brackets and the floor beams respectively provided on the vibration damping devices are connected by a connector. In the floor structure according to any one of claims 1 to 3,
The floor structure is characterized in that the predetermined length is 2727 mm. In the floor structure according to any one of claims 1 to 4,
A floor structure comprising a floor panel including the long floor beam, the short floor beam, and the floor material.   6. The floor structure according to claim 5, wherein a plurality of the floor panels are arranged side by side in contact with the side surfaces of the long floor beams arranged on the outside, and the floor panels are joined to each other. The panel board connecting part is provided at a position of 1/4 span from the edge of the long floor beam of the part, and the panel connecting part damping device is provided at the center side from the panel board connecting part. Floor structure characterized by. In the floor structure according to claim 6,
The floor structure, wherein the panel connecting portion damping device is disposed closer to the panel plate connecting portion than a center position between edges of the long floor beam. In the floor structure according to claim 7,
The panel connecting portion damping device is provided with a pair of long floor beams arranged in contact with each other, and a bracket attached to each side surface of the long floor beam, and the bracket attached to the bracket. A floor structure comprising a vibration control unit main body and a pair of the brackets connected to each other by bolts via the long floor beams. A floor construction method for constructing the floor structure according to any one of claims 1 to 8,
In a factory, a plurality of the floor beams are attached to the floor material, and the vibration control device is attached to each of the floor beams, and the floor beams are transported to a construction site and then installed on the floor. Construction method.

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