JP2013036211A - Vibration-proof floor structure and vibration-proof material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration-proof floor capable of effectively isolating vibration over a wide range of frequencies.SOLUTION: A vibration-proof floor structure is composed of a floor base 5a of a structure, a vibration-proof material 1 laid on the floor base, and a face material 5b such as concrete floor disposed on the vibration-proof material 1. The vibration-proof material 1 includes at least one sheet of a synthetic resin foam flat plate part 2 and a plurality of synthetic resin foam protrusions 3a and 3b arranged on the plate face of the flat plate part 2. The foam protrusions 3a and 3b include a first type of protrusion 3a which is disposed on the upper plate face of the flat plate part 2 and a second type of protrusion 3b which is disposed on the lower plate face of the flat plate part 2. The foam protrusions 3a and 3b are arranged on the plate faces of the flat plate part 2 such that the position of the upper plate face of the flat plate part 2 on which the first type of foam protrusion 3a is disposed and the position of the lower plate face of the flat plate part 2 on which the second type of foam protrusion 3b is disposed are different, and the areas and the like of the foam protrusions 3a and 3b and the flat plate part 2 are designed to satisfy a predetermined relation.

Description

  The present invention relates to a vibration-proof floor structure and a vibration-proof material having excellent vibration-proof performance.

As vibration-proof materials, polystyrene-based resin foam particle molded plates and glass wool boards are known.
However, the polystyrene resin foamed particle molded plate has poor flexibility depending on the expansion ratio. Therefore, a material that has been given flexibility by compressing the foamed plate in advance to buckle bubbles is a vibration-proof material. There are problems in productivity and limiting the upper load. On the other hand, glass wool boards have problems in workability, and the thickness may be reduced by absorbing moisture or creeping over a long period of time, and as a result, the necessary vibration-proofing effect may not be maintained.

  Therefore, the present inventors have previously proposed a vibration isolating material for solving the above problems (Patent Document 1 and Patent Document 2).

The anti-vibration material of Patent Document 1 is provided with a plurality of anti-vibration rubbers provided with a predetermined interval portion, and the interval portion is provided by laminating a synthetic resin foam and a plate material or a net material, This is a vibration isolating material in which a synthetic resin foam, a vibration isolating rubber, and a plate material or a net material are integrated.
The anti-vibration material of this Patent Document 1 can be produced in a factory and is excellent in light weight, and can be easily installed and installed at a construction site. Further, it is a combination of a foam and a vibration-proof rubber, and can cope with the required vibration attenuation amount and load resistance relatively freely. Furthermore, when a polyolefin resin foam is selected as the synthetic resin foam, it is suitable as a vibration-proof material for a house because it is excellent in compression recovery and water resistance.

The anti-vibration material of Patent Document 2 is composed of a synthetic resin foam flat plate portion and a plurality of polyolefin resin foam convex portions arranged at predetermined intervals on one surface of the flat plate portion. The vibration-proof material has a columnar shape, and the height of the convex portion is 25% or more of the thickness of the vibration-proof material.
Since the vibration isolator disclosed in Patent Document 2 is composed of a combination of a synthetic resin foam flat plate portion and a specific polyolefin resin foam convex portion, the vibration isolator is a basic concrete floor. By laying the polyolefin resin foam convex part downward with the floating concrete floor, a space by an air layer can be formed around the convex part, and a simple and excellent anti-vibration property The floating floor type anti-vibration floor structure could be easily constructed.

Japanese Patent Laid-Open No. 9-242314 Utility Model Registration No. 3159295

  However, all of the vibration-damping materials disclosed in Patent Documents 1 and 2 described above attenuate vibration by using compression deformation of the synthetic resin foam. For example, the vibration frequency to be attenuated is reduced. When it came, it was difficult to design anti-vibration because of the balance with compressive strength. That is, in the past, efforts have been made to improve the vibration isolation performance by reducing the elastic modulus of the vibration isolator, but there is a limit to reducing the elastic modulus of the material from the viewpoint of compressive strength, It was difficult to have sufficient vibration-proof performance.

  The present invention has been made in view of the problems of the background art described above, and an object thereof is to provide a vibration-proof floor structure and a vibration-proof material that exhibit excellent vibration-proof performance.

In order to achieve the above-described object, the present invention provides the following vibration-proof floor structure and vibration-proof material [1] to [7].
[1] A vibration-proof floor structure comprising a floor base of a structure, a vibration-proof material laid on the floor base, and a face material disposed on the vibration-proof material. The material includes at least one synthetic resin foam flat plate portion and a plurality of synthetic resin foam convex portions disposed on a plate surface of the flat plate portion, and the plurality of synthetic resin foam convex portions are the flat plate portions. A first type of foam convex portion arranged in contact with or fixed to the upper plate surface of the first plate and a second type of foam convex portion arranged in contact with or fixed to the lower plate surface of the flat plate portion. The position where the first type foam protrusion is arranged on the upper plate surface of the flat plate portion and the position where the second type foam protrusion is arranged on the lower plate surface of the flat plate portion. The synthetic resin foam convex portions are arranged on the plate surface of the flat plate portion so that they do not overlap with each other in plan view, and the area S of the plate surface of the synthetic resin foam flat plate portion is On the other hand, the total area S1 of the area s1 of the upper surface of the convex portion of the first type foam convex portion disposed on the upper plate surface of the flat plate portion and the second type foam disposed on the lower plate surface of the flat plate portion. The ratio ((S1 + S2) / S) of the total area to the total area S2 of the area s2 of the convex upper surface of the convex part is 0.15 or more, and the ratio (s1 / s2) between s1 and s2 is 0.3. An anti-vibration floor structure characterized by being -3.5.
[2] The first type foam protrusions arranged in contact with or fixed to the upper plate surface of the synthetic resin foam flat plate portion are disposed so as to form square lattice points, The above-mentioned second type foam convex part arranged in contact with or fixed to the lower plate surface is arranged at the position of the intersection of the diagonal lines of the square. Anti-vibration floor structure.
[3] The anti-vibration floor according to [1] or [2], wherein an anti-vibration rubber is attached to an appropriate position of the flat plate portion of the synthetic resin so as to penetrate the flat plate portion. Construction.
[4] The above synthetic resin foam flat plate portion and the first and second type foam convex portions are molded polyolefin resin foam particles, and the above-mentioned [1] to [ 3].
[5] The above synthetic resin foam flat plate portion and the first and second type foam protrusions are cross-linked polyethylene resin foamed in-mold molded articles, [3] The vibration-proof floor structure according to any one of [3].
[6] It includes at least one synthetic resin foam flat plate portion and a plurality of synthetic resin foam convex portions disposed on the plate surface of the flat plate portion, and the plurality of synthetic resin foam convex portions are the flat plate portions. A first type of foam convex portion arranged in contact with or fixed to the upper plate surface of the first plate and a second type of foam convex portion arranged in contact with or fixed to the lower plate surface of the flat plate portion. The position where the first type foam protrusion is arranged on the upper plate surface of the flat plate portion and the position where the second type foam protrusion is arranged on the lower plate surface of the flat plate portion. The synthetic resin foam convex portions are disposed on the plate surface of the flat plate portion so that they do not overlap with each other in plan view, and the flat plate portion has an area S of the plate surface of the synthetic resin foam flat plate portion. The total area S1 of the area s1 of the upper surface of the convex portion of the first type of foam convex portion disposed on the upper plate surface and the second surface disposed on the lower plate surface of the flat plate portion. The ratio of the total area to the total area S2 of the area s2 of the convex upper surface of the foam convex part ((S1 + S2) / S) is 0.15 or more, and the ratio (s1 / s2) between s1 and s2 is An anti-vibration material characterized by being 0.75 to 1.25.
[7] The first type foam protrusions arranged in contact with or fixed to the upper plate surface of the synthetic resin foam flat plate portion are disposed so as to form square lattice points, The above-mentioned second type foam convex part arranged in contact with or fixed to the lower plate surface is arranged at the position of the intersection of the diagonal lines of the square. Anti-vibration material.

  According to the above-described vibration-proof floor structure of the present invention, the vibration-proof material having the synthetic resin foam convex portions respectively disposed on the upper and lower plate surfaces of the synthetic resin foam flat plate portion is laid on the floor base, and the vibration-proof material. A surface material such as a concrete floor is disposed on the surface, and the vibration isolating material has a synthetic resin foam convex portion on the flat plate portion on the upper plate surface and the lower plate surface of the synthetic resin foam flat plate portion. Synthetic resin foam against vibration because it is arranged at different positions and designed so that the area of the foam convex part and the flat plate part satisfies a predetermined relationship. Vibration can be damped not only by compressive deformation of the flat plate portion but also by effective bending deformation, and vibration in a wider frequency range can be effectively prevented.

It is the figure which showed 1st Embodiment of the vibration isolator which concerns on the vibration isolator floor structure of this invention, Comprising: (a) is a top view, (b) is a front view, (c) is a right view. It is the figure which showed the anti-vibration floor structure of this invention constructed | assembled using the anti-vibration material of FIG. 1, Comprising: (a) is notional of the anti-vibration floor part equivalent to the part in alignment with the AA of FIG. (B) is an expanded sectional view of B part of (a) figure. It is the figure which showed the 1st synthetic resin foam board used in 2nd Embodiment of the vibration isolator which concerns on the vibration-proof floor structure of this invention, (a) is a top view, (b) is a front view, (C) is a right side view. It is the figure which showed the 2nd synthetic resin foam board used in 2nd Embodiment of the vibration isolator which concerns on the vibration-proof floor structure of this invention, Comprising: (a) is a top view, (b) is a front view, (C) is a right side view. It is the figure which showed 2nd Embodiment of the vibration-proof material based on the vibration-proof floor structure of this invention formed combining the synthetic resin foam board shown in FIG. 3, FIG. 4, Comprising: (a) is a top view (B) is a front view, (c) is a right side view. It is the figure which showed the anti-vibration floor structure of this invention constructed | assembled using the anti-vibration material of FIGS. 3-5, Comprising: The conceptual of the anti-vibration floor part corresponded to the part in alignment with CC line of FIG. It is sectional drawing. It is the front view which showed notionally the measuring method of the vibration transmissibility of a vibration isolator. It is the figure which showed the change of the vibration transmissibility based on the theory when the frequency of forced excitation is changed. It is the figure which showed the test body of the Example produced as an example of 1st Embodiment of the vibration isolator which concerns on the vibration isolator floor structure of this invention, Comprising: (a) is a top view, (b) is a front view. is there. It is the figure which showed the test body of the comparative example produced as an example of the prior art which produces only a compressive deformation with respect to the test body of the Example of FIG. 9, Comprising: (a) is a top view, (b) is a front view It is. It is the figure which showed the test body of the Example produced as an example of 2nd Embodiment of the vibration isolator which concerns on the vibration-proof floor structure of this invention, Comprising: (a) is a top view, (b) is a front view. is there. It is the figure which showed the test body of the comparative example produced as an example of the prior art which produces only a compressive deformation with respect to the test body of the Example of FIG. 11, Comprising: (a) is a top view, (b) is a front view It is. It is the figure which showed the test body of the Example produced as another example of 1st Embodiment of the vibration isolator which concerns on the vibration-proof floor structure of this invention, (a) is a top view, (b) is a front view FIG. It is the figure which showed the test body of the Example produced as an example by which the 1st type foam convex part with a small upper surface area was formed with respect to the test body of the Example of FIG. 13, (a) A top view and (b) are front views.

  Hereinafter, embodiments of the vibration isolator according to the above-described vibration isolator floor structure of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a view showing a first embodiment of a vibration isolating material according to the vibration isolating floor structure of the present invention.
In this example, the vibration isolator 1 includes a single synthetic resin foam flat plate portion 2. And many synthetic resin foam convex parts 3a and 3b are each arrange | positioned so that a square lattice point may be formed in the upper-plate surface and lower-plate surface of this synthetic resin foam flat plate part 2. FIG.

  As shown in FIG. 1, the synthetic resin foam convex portions 3a and 3b arranged on the upper and lower plate surfaces of the synthetic resin foam flat plate portion 2 are formed on the upper plate surface. There is no synthetic resin foam convex portion (second type foam convex portion) 3b on the lower plate surface where the one type of foam convex portion 3a is disposed, and the synthetic resin foam is provided on the lower plate surface. There is no synthetic resin foam convex part (first type foam convex part) 3a on the upper plate surface where the convex part (second type foam convex part) 3b is disposed. It arrange | positions so that it may not overlap by planar view. Specifically, the lattice point formed by the center of each square (intersection of diagonal lines) of the square lattice point on which the synthetic resin foam convex portion (first type foam convex portion) 3a on the upper plate surface is disposed. The synthetic resin foam convex part (2nd type foam convex part) 3b of the lower board surface is arrange | positioned in the position. Preferably, the synthetic resin foam convex portions 3a and 3b are fixed to the synthetic resin foam flat plate portion 2 by adhesion or integral molding. In the illustrated embodiment, the synthetic resin foam convex portions 3a and 3b are fixed. The body flat plate portion 2 and the synthetic resin foam convex portions 3a and 3b are integrally formed by in-mold molding of synthetic resin foam particles. Moreover, in this example, the four anti-vibration rubbers 4 are provided so as to penetrate the synthetic resin foam flat plate portion 2 at a position where the load burden becomes as uniform as possible. The anti-vibration rubber 4 may be fixed to the synthetic resin foam flat plate portion 2 at the site or may be fixed in advance at the factory.

  The synthetic resin foam convex portions (first and second type foam convex portions) 3a and 3b are respectively disposed on the upper and lower plate surfaces of the synthetic resin foam flat plate portion 2 so as to be evenly distributed. Here, an example in which square lattice points are formed is shown here, but rectangular lattice points, triangular lattice points, or hexagonal lattice points may be formed. Also, if the positions where the synthetic resin foam convex portions 3a and 3b are arranged on the synthetic resin foam flat plate portion 2 on the upper and lower plate surfaces of the synthetic resin foam flat plate portion 2 do not overlap in a plan view, An arrangement that looks messy may be used.

FIG. 2 is a diagram showing a state in which a vibration-isolating floor having a floating floor structure is constructed using the vibration-isolating material of FIG.
This anti-vibration floor 10 lays the above-described anti-vibration material 1 on the foundation concrete floor 5a, and casts concrete over the plywood 6 above it to form a face material made of a concrete floor. The floating concrete floor 5b Is built. In this case, since the anti-vibration rubber 4 is disposed on the anti-vibration material 1 so that the load distribution is uniform, the synthetic resin foam convex portions (first type and second type foam convex portions) 3a, When supporting the load from the upper part only with 3b, some synthetic resin foam convex parts may be crushed or the vibration absorbing power may be reduced, but the anti-vibration rubber 4 has an effect of preventing this. Further, since the vibration absorption frequency band of the vibration isolating rubber 4 is different from that of the synthetic resin foam such as the synthetic resin foam flat plate portion 2 constituting the other part of the vibration isolating material 1, the vibration isolating rubber 4 is put in place. Providing it can also be expected to have the effect of absorbing vibration in a wide frequency band.

  When vibration is received in the vibration-isolating floor 10 having the above structure, the synthetic resin foam convex portions 3a and 3b are compressed and deformed, and the synthetic resin foam flat plate portion 2 is deformed and absorbs vibration. That is, the vibration of the upper floating concrete floor 5a causes compressive deformation of the anti-vibration rubber 4 and the upper synthetic resin foam convex portion (first type foam convex portion) 3a, and the lower synthetic resin foam. Since the convex portion (second type foam convex portion) 3b supports the synthetic resin foam flat plate portion 2 at a location not directly below the upper synthetic resin foam convex portion (first type foam convex portion) 3a, A synthetic resin foam convex portion (second type) that causes the deformation deformation of the synthetic resin foam flat plate portion 2 due to the shearing force as shown in an enlarged view in FIG. 2B and further supports the synthetic resin foam flat plate portion 2. The foam protrusion 3b is caused to undergo compression deformation. Therefore, vibration is absorbed not only by compressive deformation of the synthetic resin foam but also by bending deformation.

Here, the longitudinal elastic modulus E related to the compressive deformation of the solid and the transverse elastic modulus G related to the bending deformation have a relationship of E = G / 2 (1 + ν), where Poisson's ratio is ν (ν> 0). .
Therefore, generally, the longitudinal elastic modulus E of the solid is larger than the transverse elastic modulus G. As can be seen from FIG. 2, when the thickness of the floor to be formed is taken into consideration, the interval between the synthetic resin foam convex portions (the distance between the fulcrums) can be made larger than the thickness of the synthetic resin foam convex portions. Therefore, the natural frequency of the flexural deformation related to the distance between the transverse elastic modulus G and the fulcrum is lower than the natural frequency of the compressive deformation related to the longitudinal elastic modulus E and the thickness. It is considered that the natural frequency of the vibration isolator 1 becomes lower than that using only compression deformation. Shifting in the direction in which the natural frequency of the vibration isolator is low means that the frequency range where the anti-vibration effect is recognized widens, and the vibration isolator 1 according to the first embodiment vibrates in a wide frequency range. Can be effectively anti-vibrated.

3-5 is the figure which showed 2nd Embodiment of the vibration isolator which concerns on the vibration isolator floor structure of this invention, FIG. 3 is 1st which comprises the vibration isolator which concerns on 2nd Embodiment. FIG. 4 is a view showing a second synthetic resin foam plate constituting the vibration isolator according to the second embodiment, and FIG. 5 is a view showing the first and second synthetic resin foam plates. It is the figure which showed 2nd Embodiment of the vibration isolator which concerns on this invention formed combining the synthetic resin foam board of this.
The vibration isolator 11 according to the second embodiment includes first and second synthetic resin foam plates 11A and 11B. A large number of synthetic resin foam convex portions (first type foam convex portions) 13a form square lattice points on the lower plate surface of the synthetic resin foam flat plate portion 12a of the first synthetic resin foam plate 11A. It is arranged like this. At the position corresponding to the lattice point formed by the center of each square (intersection of diagonal lines) of the lattice point where the synthetic resin foam convex portion 13a disposed on the first synthetic resin foam plate 11A is disposed, A synthetic resin foam convex portion (second type foam convex portion) 13b is disposed on the lower plate surface of the synthetic resin foam flat plate portion 12b of the second synthetic resin foam plate 11B. On the contrary, the lattice point where the synthetic resin foam convex part (2nd type foam convex part) 13b of the lower plate surface of the synthetic resin foam flat plate part 12b of the second synthetic resin foam board 11B is disposed. Of the first synthetic resin foam plate 11A on the lower plate surface of the first synthetic resin foam plate 11A at a position corresponding to a lattice point formed by the center of each square (intersection of diagonal lines). 1 type of foam convex part) 13a is arrange | positioned. Preferably, the synthetic resin foam convex portions 13a and 13b are fixed to the synthetic resin foam flat plate portions 12a and 12b, respectively, by bonding or integral molding to form the first and second synthetic resin foam plates 11A and 11B. Has been. In the illustrated embodiment, the first synthetic resin foam plate 11A includes a synthetic resin foam flat plate portion 12a, the first type foam convex portion 13a, and the second synthetic resin foam. In the body plate 11B, the synthetic resin foam flat plate portion 12b and the second-type foam convex portion 13b are integrally formed by in-mold molding of synthetic resin foam particles.

  As shown in FIG. 5, in the vibration isolator 11 according to the second embodiment formed by combining the first and second synthetic resin foam plates 11A and 11B, the second synthetic resin foam plate 11B. Synthetic resin foam convex portions (second type foam convex portions) 13b formed on the lower plate surface of the lower plastic plate support the synthetic resin foam flat plate portion 12b of the second synthetic resin foam plate 11B. On the other hand, the synthetic resin foam convex part (the first synthetic resin foam plate 11B formed on the lower plate surface of the first synthetic resin foam plate 11A on the upper plate surface of the synthetic resin foam flat plate portion 12b of the second synthetic resin foam plate 11B. One type of foam convex part) 13a is in contact, but there is no synthetic resin foam convex part (second type foam convex part) 13b immediately below, and the foam convex parts 13b and 13a are not aligned. Are arranged so as not to overlap each other in plan view. Further, in this example, four anti-vibration rubbers 14 are provided so as to penetrate the first and second synthetic resin foam plates 11A and 11B at a position where the load burden is as even as possible. The combination of the first and second synthetic resin foam plates 11A and 11B and the anti-vibration rubber 14 may be fixed on site or in a factory.

  As in the first embodiment described above, the synthetic resin foam convex portions (first and second type foam convex portions) 13a and 13b are different from each other in the second synthetic resin foam plate 11B. The synthetic resin foam flat plate portion 12b may be in contact with or fixed to the upper plate surface and the lower plate surface, respectively, and FIGS. 3 to 5 show examples in which the square lattice points are formed. , Rectangular lattice points, or triangular lattice points or hexagonal lattice points. Further, on the upper and lower plate surfaces of the synthetic resin foam flat plate portion 12b of the second synthetic resin foam plate 11B, the positions where the synthetic resin foam convex portions 13a and 13b are in contact with or fixed to the foam flat plate portion are flat. As long as it does not overlap visually, it may be arranged so that it looks messy.

FIG. 6 is a diagram illustrating a state in which a vibration-isolating floor having a floating floor structure is constructed using the vibration-isolating material 11 illustrated in FIGS. 3 to 5.
This anti-vibration floor 20 is constructed by laying the above-mentioned anti-vibration material 11 on a foundation concrete floor 15a and placing concrete from above to construct a floating concrete floor 15b. Even in the case of the vibration-proof floor 20 using the vibration-proof material 11 according to the second embodiment, the vibration-proof rubber 14 is disposed at an appropriate position. When the load from the upper part is supported only by the parts (first and second type foam convex parts) 13a, 13b, it is prevented that some synthetic resin foam convex parts are crushed or the vibration absorbing power is lost. Has an effect. Moreover, since the vibration absorption frequency band of the synthetic resin foam which comprises the other part of the vibration-proof material 11 and the vibration-proof rubber 14 differs, the effect which can absorb a vibration in a wide frequency band can also be anticipated.

  Further, when vibration is received in the vibration-isolating floor 20 having the above structure, the vibration-proof rubber 14 absorbs vibration due to compression deformation, and the compression deformation of the synthetic resin foam convex portions 13a and 13b and the second synthetic resin foaming. The vibration is absorbed by the bending deformation of the synthetic resin foam flat plate portion 12b of the body plate 11B. That is, the vibration of the upper floating concrete floor 15b causes the compressive deformation of the anti-vibration rubber 14 and the synthetic resin foam convex portion (first type foam convex portion) 13a that supports the first synthetic resin foam plate 11A. At the same time, the lower synthetic resin foam convex portion (second type foam convex portion) 13b is not directly below the upper synthetic resin foam convex portion (first type foam convex portion) 13a. In order to support the synthetic resin foam plate 11B, the deformation deformation of the synthetic resin foam flat plate portion 12b of the second synthetic resin foam plate 11B due to the shearing force as in FIG. 2B in the case of the first embodiment. Further, the lower synthetic resin foam convex portion (second type foam convex portion) 13b supporting the second synthetic resin foam plate 11B is compressed and deformed. Therefore, the vibration is absorbed not only by the compression deformation of the synthetic resin foam but also by the bending deformation. For the same reason as in the case of the first embodiment, the vibration isolator 11 according to the second embodiment is Vibration can be effectively prevented in a wide frequency range.

  The vibration isolator 11 according to the second embodiment described above includes two synthetic resin foam plates 11A and 11B, but it is also possible to stack three or more synthetic resin foam plates. At this time, the synthetic resin foam convex part (first type foam convex part) arranged in contact with or fixed to the upper plate surface of the synthetic resin foam flat plate part of at least one synthetic resin foam board Immediately below, the synthetic resin foam convex portion (second type foam convex portion) arranged in contact with or fixed to the lower plate surface of the synthetic resin foam flat plate portion does not overlap in plan view. By arranging the first and second type foam protrusions, the synthetic resin foam flat plate portion is caused to bend and deform to absorb vibration. Even in such a case, the anti-vibration rubber is disposed so as to penetrate all the synthetic resin foam plates, and the anti-vibration rubber is arranged so that the load from above is evenly distributed to the convex portions of the synthetic resin foam. It is preferable to install.

  As the base resin constituting the synthetic resin foam flat plate portion and the first and second type foam convex portions of the vibration-damping material according to the present invention described above, a polyethylene-based resin (low density polyethylene, linear low Density polyethylene, high density polyethylene), polypropylene resin (ethylene-propylene random copolymer, butene-propylene random copolymer, ethylene-propylene block copolymer, butene-propylene block copolymer, ethylene-propylene-butene random) Copolymer, polypropylene), polystyrene resin (polystyrene, high impact polystyrene, styrene copolymer resin), other composite resins of polystyrene resin and polyolefin resin, phenol resin, vinyl chloride resin, polycarbonate resin, etc. Can be used. These base resins may be cross-linked or non-cross-linked, but are preferably cross-linked from the viewpoint of durability. Among the above synthetic resins, since the vibration-proof material obtained has an excellent balance between flexibility and mechanical strength, has high water resistance, and has a small repeated compression set, such as a crosslinked polyethylene resin, a polypropylene resin, etc. A polyolefin resin, a composite resin of a polystyrene resin and a polyolefin resin is preferable, and a crosslinked polyethylene resin is most preferable from the viewpoint of vibration proof performance.

  Moreover, as a manufacturing method of the said synthetic resin foam flat plate part, conventionally well-known methods, such as the extrusion foaming method using the said resin, the method of carrying out the in-mold shaping | molding using foamed particle | grains, are mentioned. Among these methods, the foamed particle in-mold molding method is preferable from the viewpoint of vibration-proof characteristics of the vibration-proof material to be obtained. The foamed particle-in-mold molded product obtained by this method is particularly preferable as a vibration-proof material in the present invention because of excellent uniformity in mechanical properties in the vertical, horizontal, and thickness directions. Therefore, as the synthetic resin foam flat plate portion and the foam convex portion, a cross-linked polyethylene resin expanded particle-in-mold molded product is particularly preferable.

In the present invention, the same base resin is usually selected for the synthetic resin foam flat plate portion and the foam convex portion, but different base resins may be selected. Moreover, the density of the foam which comprises a foam convex part and a synthetic resin foam flat plate part is 0.02-0.09 g / cm < ³ >, and also 0.03-0.06 g / cm from a viewpoint of a vibration proof function. ³ is preferred. In addition, as a vibration isolator in this invention, it can also design so that the density of the foam which comprises a foam convex part and a synthetic resin foam flat plate part may differ.
Moreover, the foam convex part of the above-mentioned vibration isolator according to the present invention is disposed in contact with or fixed to the synthetic resin foam flat plate part. In addition, when a foam convex part and a synthetic-resin foam flat plate part are fixed, both can also be adhere | attached with an adhesive agent, and both can be integrally molded by the in-mold molding method of a foam particle, etc. You can also.

  The shape of the synthetic resin foam flat plate portion is preferably a square or rectangular plate shape, and specifically, a plate shape of 900 to 2000 mm in length and 600 to 1500 mm in width is preferable. In addition, the arrangement of the first type foam convex portion on the synthetic resin foam flat plate portion is in the vicinity of the middle position of the second type foam convex portion supporting the synthetic resin foam flat plate portion from below. This is preferable for effectively causing the flexural deformation in the flat plate portion of the synthetic resin foam, and the distance between the foam convex portions as the fulcrum distance is preferably 5 to 30 mm, more preferably 10 to 25 mm.

  The shape of the first and second type foam protrusions is a columnar shape that can press or support a synthetic resin foam flat plate such as a cylinder, a prism, a cone, a pyramid, a truncated pyramid, or an inverted truncated pyramid. If there is no particular limitation, it is selected from a cylinder, a polygonal column, a truncated cone, a truncated pyramid, or a part of which is notched because it is easy to manufacture, excellent in strength, and difficult to break. One or more columnar shapes are preferred. Among these, a truncated cone shape and a polygonal truncated pyramid shape that exhibit stronger elasticity as they are compressed are preferable.

Moreover, since the shape of the front-end | tip of a 1st type and 2nd type foam convex part is excellent in stability at the time of comprising a vibration-proof floor structure, it is formed so that it may become a plane at least in a construction state. In that case, the area s1 of the convex upper surface (front end plane) of the first type foam convex portion arranged on the upper plate surface of the flat plate portion relative to the area S of the plate surface of the synthetic resin foam flat plate portion. Of the total area S1 and the total area S2 of the areas s2 of the top surfaces (tip planes) of the second type foam protrusions disposed on the lower plate surface of the flat plate portion ((S1 + S2 ) / S) is 0.15 or more, preferably 0.15 to 0.56, more preferably 0.20 to 0.55, and particularly preferably 0.25 to 0.53. If the value of ((S1 + S2) / S) is too small, the amount of distortion of the vibration-proof material increases, and the workability, vibration-proof performance, and the like may decrease. On the other hand, if the value of ((S1 + S2) / S) is too large, the vibration-proof performance due to the bending deformation of the synthetic resin foam flat plate portion may be insufficient. Therefore, the total area (S1 + S2) of the flat surface of the tip is preferably 1500 to 8000 cm ² , more preferably 2000 to 6000 cm ² , and particularly preferably 2500 to 5000 cm ² per 1 m ^{2 of the} vibration-proof material.

  The ratio of s1 and s2 (s1 / s2) is 0.3 to 3.5, more preferably more than 0.3 and not more than 3.0, and particularly preferably 0.4 to 2.5. . If the value of (s1 / s2) is too small or too large, the convex part on one side is distorted excessively more than the convex part on the other side, and the vibration-proof performance due to the bending deformation of the synthetic resin foam flat plate part is insufficient. Become.

  In general, the vibration-proof material in the present invention is formed in a square or rectangular fixed plate shape in which the first and second type foam protrusions are regularly and repeatedly arranged. , S1 and S2 are the surface area of the synthetic resin foam flat plate portion of the vibration isolator S, and the upper surface of the convex portion of the first type of foam convex portion arranged on the upper plate surface of the flat plate portion ( S1 is the total area of the area s1 of the flat surface of the tip, and S2 is the total area of the area s2 of the convex upper surface (the flat surface of the tip) of the second type foam convex portion disposed on the lower plate surface of the flat plate portion. To do. In rare cases, the vibration-proof material in the present invention may be an indeterminate plate shape. In that case, the areas S, S1, and The value of S2 can be obtained. Moreover, in the vibration-proof material in which the 1st type or 2nd type foam convex part from which a magnitude | size and a shape differ is formed, the value of s1 and s2 is the convex upper surface of the foam convex part from which a magnitude | size and a shape differ ( The average value of the area of the flat surface at the tip (S1 / number of first-type foam protrusions or S2 / number of second-type foam protrusions) is adopted.

Furthermore, the total number of the first type and the second type of foam convex part is based on the shape of the convex part, etc. It is preferable that it is 80-200 per 1 m < ² > of synthetic resin foam flat-plate parts, and also 100-180.

  Although the height of the foam convex portion depends on the shape of the convex portion, etc., the first embodiment, that is, one synthetic resin foam flat plate portion, is used to express particularly excellent vibration-proofing performance of the vibration-proof material. In the anti-vibration material having the first and second type foam protrusions disposed on the upper and lower plate surfaces, the thickness of the synthetic resin foam flat plate part and the first and second type foam protrusions are provided. 25 to 45%, more preferably 30 to 40%, of the sum of the thicknesses of the parts (total thickness of the vibration-proof material 1). In the second embodiment, in the synthetic resin foam flat plate portion where the foam convex portions are located at least on the upper and lower plate surfaces, the thickness of the synthetic resin foam flat plate portion and the foam convex portions on the upper and lower plate surfaces of the flat plate portion Is preferably 25 to 45%, more preferably 30 to 40% of the total thickness. Specifically, the height of the convex portion is preferably 10 to 100 mm, more preferably 20 to 50 mm.

Examples of the face material disposed on the vibration-proof material in the above-described vibration-proof floor structure of the present invention include concrete, flooring material, plywood, and resin tile. Such a face material may have a bending rigidity of 0.5 to 30 N · m ² in the case of designing an anti-vibration action in consideration of the propagation of vibrations to the anti-vibration material below due to the bending deflection of the face material. Preferably, it is 0.6-20 N · m ² . The bending rigidity in this specification is based on a bending test described in JIS A1408: 2001. Test specimen dimensions: length 200 mm, width 150 mm, bending test span: 150 mm, air-drying state: good ventilation of the specimen. It is a value measured under conditions of standing indoors for 7 days, measuring atmosphere temperature 23 ° C., and humidity 50%.
On the other hand, in the case of using a face material having such a high bending rigidity that it is not necessary to consider the bending bending of the face material such as concrete, the vibration of the face material can be transmitted to the vibration-proof material in a wide area, The anti-vibration effect of the present invention is efficiently expressed.

  The anti-vibration material of the present invention can be provided with a vibration-proof rubber penetrating as described above, as long as the anti-vibration effect by disposing the anti-vibration material of the present invention is not impaired. The anti-vibration rubber is preferably arranged regularly such as at regular intervals. The interval at which the anti-vibration rubber is disposed is preferably 100 to 500 mm, more preferably 150 to 350 mm, from the viewpoint of improving load bearing performance. When the anti-vibration rubber is regularly arranged, for example, when the concrete is placed on the anti-vibration material to form a floating floor structure, the load of the upper concrete is evenly distributed. A large load is applied to some of the convex portions of the synthetic resin foam, and the convex portions can be prevented from being crushed.

  As the material of the anti-vibration rubber, from the viewpoint of improving the load resistance of the anti-vibration material without impairing the anti-vibration performance of the foam constituting the anti-vibration material, particularly the foam constituting the convex portion, An anti-vibration rubber having a dynamic spring constant smaller than the dynamic spring constant is preferably selected. Specifically, a rubber made of natural rubber can be employed. In addition, the said dynamic spring constant is a value calculated | required from the natural frequency obtained by the sine wave excitation method based on the measuring method prescribed | regulated by JISA6321.

  Although there is no restriction | limiting in the shape of an anti-vibration rubber | gum, Since it is easy to attach to an anti-vibration material, a square pillar or a cylinder is preferable. When the horizontal cross section is square or rectangular, the length of the maximum side is 30 to 100 mm, preferably 40 to 70 mm. When the horizontal cross section is circular, the length of the diameter is 30 to 100 mm, preferably 40 to 70 mm. As a method for attaching the anti-vibration rubber, there is a method in which a hole having a horizontal cross-sectional shape of the anti-vibration rubber is formed in the flat plate portion, and the anti-vibration rubber is inserted into the hole. The thickness of the anti-vibration material is the same as the overall height of the anti-vibration material, in order to maintain a sufficient anti-vibration material volume in the anti-vibration floor structure and to exhibit excellent anti-vibration performance. It is preferable that the thickness is somewhat thicker than the overall height of the vibration material, and specifically 25 mm or more is preferable. From this viewpoint, it is more preferably 30 mm or more, and further preferably 50 mm or more. If the thickness is too thick, a space such as a residence is narrowed in a building having a certain size. Therefore, the upper limit is preferably 150 mm, and more preferably 100 mm.

  A lot of anti-vibration rubber is placed in places where elevator equipment is installed on the anti-vibration floor structure of the building underground parking lot or where heavy objects such as pianos are placed on the anti-vibration floor structure of the apartment private room. It is also possible to provide a spare through-hole for vibration-proof rubber in the synthetic resin foam flat plate portion so that it can be provided. In addition, in order to install in such a place, a specially arranged many anti-vibration rubbers may be shipped at the factory.

  Further, in the first embodiment, the first type and the second type foam convex portions are compressed by making the foam ratios of the first type and the second type foam convex portions different from each other, but not the same. By changing the elastic modulus, vibrations may be absorbed in different frequency bands, and the efficiency of vibration absorption may be improved in a wide frequency band. Further, from the same viewpoint, in the second embodiment, the foaming ratio of the synthetic resin foam flat plate portion of the first synthetic resin foam plate and the first type of foam convex portion fixed thereto, and the second The foaming ratio of the synthetic resin foam flat plate portion of the synthetic resin foam plate may be different from the foaming magnification of the second type foam convex portion fixed thereto.

  The anti-vibration material of the present invention includes a floor of a house, a floor of a measurement room where precision equipment is installed, a floor anti-vibration material used in a studio, etc .; a vibration-proof wall used in a house, building, studio, etc .; Anti-vibration material for vibration isolation used as a base for objects that dislike vibrations; Vibration isolation material used for the purpose of vibration isolation in railways, subways, etc .; Temporary construction used for vibration absorption of construction vehicles and machinery It can be used for applications such as vibration-proof materials, and has excellent vibration-proof properties and sound-insulation properties, and is particularly suitable as a vibration-proof material for structures such as for vibration-proof floors.

  The preferred embodiments of the vibration-proof floor structure and the vibration-proof material according to the present invention have been described above, but the present invention is not limited to the above-described embodiments, and the present invention described in the claims. Of course, various modifications and changes can be made within the scope of the technical idea.

  The test etc. which compared the anti-vibration material which concerns on the 1st and 2nd embodiment of this invention mentioned above and the anti-vibration material of the prior art corresponding to each were conducted.

FIG. 7 is a diagram conceptually showing a method for measuring the vibration transmissibility of each specimen.
This method is widely used for testing vibration-proof rubber and the like. A heavy object 101 is placed on a test body 100, the test body 100 is vibrated by a vibration device 102, and the vibration of the heavy object 101 is performed. It measures the amplitude of. When the amplitude a ₁ of the forced vibration of the vibration device 102 is input and the amplitude of the heavy object 101 that is the output to the input is a ₂ , the ratio τ at which the vibration is transmitted is referred to as a vibration transmissibility. ).

τ = | a _{2 /} a ₁ | (1)

Further, when the natural frequency at the time of vibration isolation support is f ₀ and the frequency of forced vibration is f, τ is expressed by the following equation (2).

τ = | 1 / (1- (f / f ₀ ) ² ) | (2)

While changing the frequency f of the forced excitation, a ₁ and a ₂ are measured, the vibration transmissibility τ is obtained by the equation (1), and the natural frequency f ₀ is obtained by using the equation (2).

FIG. 8 is a diagram showing a change in vibration transmissibility τ based on the theory when the frequency f of forced excitation is changed. As can be seen from the above equation (2) and FIG. 8, τ diverges at f = f ₀ . The same is true, but the reciprocal of τ is zero. The natural frequency f ₀ is obtained from this zero cross point. Theoretically, it has been found that there is an anti-vibration effect in the frequency region of the natural frequency f ₀ √2 or more. Therefore, by measuring the natural frequency f ₀ , the anti-vibration effect can be determined.
Based on the above theory, several specimens were tested as follows.

  In all the tests, 25 mm thick 300 mm 300 mm iron plate (load: 17.6 kg) was used as a heavy object, and forced excitation was performed at 5 to 100 Hz and 0.2 G. All test specimens were prepared by bonding a synthetic resin foam flat plate part made of a polyolefin resin foamed molded article (JSP Co., Ltd .: Mirablock 26S) and synthetic resin foam convex parts of various shapes and sizes with an adhesive. Had made. In the first to fourth tests, all of the synthetic resin foam flat plate portions have the same dimensions, and a square plate having a thickness of 25 mm and a length and width of 300 mm was used. In the fifth and sixth tests, the synthetic resin foam flat plate portion was a square plate having a thickness of 25 mm and a width and width of 250 mm. 9-14 is the figure which showed the produced various test bodies.

The first test was performed using the test specimen shown in FIG. In this test body, a total of nine synthetic resin foam convex portions of 40 mm 40 mm (thickness 25 mm) are arranged at the four corners, the center of the peripheral edge and the center of the lower plate surface of the synthetic resin foam flat plate portion. A total of four synthetic resin foam convex portions of 60 mm 60 mm (thickness 25 mm) are formed on the upper surface of the synthetic resin foam flat plate portion at positions corresponding to the intersections of the square diagonal lines formed by the synthetic resin foam convex portions. It is arranged. The natural frequency f ₀ obtained in this test body was 8 Hz. In addition, with respect to the area S of the plate surface of the synthetic resin foam flat plate portion, the total area S1 of the area s1 of the upper surface of the convex portion of the first type foam protruded on the upper plate surface of the flat plate portion and the flat plate The ratio ((S1 + S2) / S) of the total area to the total area S2 of the area s2 of the upper surface of the convex part of the second type foam convex part disposed on the lower plate surface of the part is 0.32, (s1 / s2 ) Is 2.3.

The second test was conducted with the test body shown in FIG. In this test body, a total of nine synthetic resin foam convex portions of 40 mm 40 mm (thickness 25 mm) are arranged at corresponding positions on the upper and lower plate surfaces of the synthetic resin foam flat plate portion. is there. The natural frequency f ₀ obtained in this specimen was 15 Hz. In this specimen, ((S1 + S2) / S) is 0.32, and (s1 / s2) is 1.0.

The reason why the natural frequency (8 Hz) obtained in the first test is smaller than the natural frequency (15 Hz) obtained in the second test is explained as follows.
The first specimen corresponds to the first embodiment of the present invention. For ease of understanding, in FIG. 9, the same reference numerals are assigned to members corresponding to those in FIG. The upper synthetic resin foam convex part (first type foam convex part) 3a and the lower synthetic resin foam convex part (second type fat foam convex part) 3b are the synthetic resin foam flat plate part 2. Since the upper plate surface and the lower plate surface are disposed at positions that do not correspond to each other, the synthetic resin foam flat plate portion 2 is bent and deformed, and the natural frequency is low. On the other hand, in the comparative test body of the second test, since both of the synthetic resin foam convex portions are disposed at corresponding positions, the synthetic resin foam flat plate portion does not bend and deform, Only the compression deformation of the convex part of the synthetic resin foam occurs, and the natural frequency is high.
The comparison results of the first and second tests indicate that the first embodiment of the present invention has a vibration isolation effect up to a low frequency range due to bending deformation.

The third test was conducted with the test body shown in FIG. This test body is a test body in which two synthetic resin foam plates each having a synthetic resin foam convex portion disposed on the lower plate surface of the synthetic resin foam flat plate portion are stacked. A total of nine synthetic resin foam convex portions of 40 mm 40 mm (thickness 25 mm) are arranged at the four corners, the peripheral center and the center of the lower plate surface of the synthetic resin foam flat plate portion of the lower synthetic resin foam plate. . The synthetic resin foam convex part on the lower plate surface of the synthetic resin foam flat plate part of the upper synthetic resin foam plate is the center of the square lattice (diagonal line) formed by the synthetic resin foam convex part of the lower synthetic resin foam plate. A total of four synthetic resin foam convex portions of 60 mm 60 mm (thickness 25 mm) are arranged at positions corresponding to (intersection points). The natural frequency f ₀ obtained in this test body was 8 Hz. In this specimen, ((S1 + S2) / S) is 0.32, and (s1 / s2) is 2.3.

The fourth test was performed with the test body shown in FIG. In this test body, a total of 9 synthetic resin foam convex portions of 40 mm 40 mm (thickness 25 mm) are formed at the same position on the lower plate surface of each synthetic resin foam flat plate portion of the two synthetic resin foam plates. The two synthetic resin foam plates are arranged and overlapped. The natural frequency f ₀ obtained in this specimen was 14 Hz. In this specimen, ((S1 + S2) / S) is 0.32, and (s1 / s2) is 1.00.

The reason why the natural frequency (8 Hz) obtained in the third test is smaller than the natural frequency (14 Hz) obtained in the fourth test is as follows, similar to the results of the first and second tests. Explained.
The specimen for the third test corresponds to the second embodiment of the present invention. In order to facilitate understanding, in FIG. 11, members corresponding to those in FIGS. 3 to 5 are denoted by the same reference numerals. For the lower synthetic resin foam plate 11B, the synthetic resin foam convex portion (first type foam convex portion) 13a disposed on the upper surface of the flat plate portion 12b and the synthetic resin foam disposed on the lower surface. Since the body convex portion (the second type foam convex portion) 13b is disposed at a position where the upper and lower plate surfaces of the synthetic resin foam flat plate portion 12b do not overlap in plan view, The resin foam flat plate portion 12b was bent and deformed, and the natural frequency was low. On the other hand, in the comparative test body of the fourth test, since both of the synthetic resin foam convex portions are arranged at positions where they overlap in a plan view, the plastic resin foam flat plate portion is not deformed. However, only the compression deformation of the convex part of the synthetic resin foam occurs, and the natural frequency is high.
The comparison results of the third and fourth tests indicate that the second embodiment of the present invention has a vibration isolation effect up to a low frequency range due to bending deformation.

The fifth test was conducted with the test body shown in FIG. This test sample is a synthetic resin foam convex part of a regular quadrangular pyramid shape (thickness 25 mm) having a bottom surface of 50 mm and 50 mm and an upper surface of 40 mm and 40 mm at the center and the center of the lower plate surface of the synthetic resin foam flat plate part. Are placed at a position corresponding to the intersection of the square diagonal lines formed by the convex portions of the synthetic resin foam on the lower plate surface, and the bottom surface is 50 mm and 50 mm on the upper plate surface of the synthetic resin foam flat plate portion. A total of four convex portions of a synthetic resin foam having a square pyramidal trapezoidal shape (thickness of 25 mm) of 40 × 40 mm. The natural frequency f ₀ obtained in this test body was 10 Hz. In this specimen, ((S1 + S2) / S) is 0.28, and (s1 / s2) is 1.0.

The sixth test was conducted with the test body shown in FIG. This test sample is a synthetic resin foam convex part of a regular quadrangular pyramid shape (thickness 25 mm) having a bottom surface of 50 mm and 50 mm and an upper surface of 40 mm and 40 mm at the center and the center of the lower plate surface of the synthetic resin foam flat plate part. Is placed at a position corresponding to the intersection of the diagonals of the square formed by the convex part of the synthetic resin foam on the lower plate surface, and 20 mm 20 mm (thickness 25 mm) on the upper plate surface of the synthetic resin foam flat plate part. ) Synthetic resin foam convex portions are disposed in total. The natural frequency f ₀ obtained in this test specimen was 9 Hz, but a second peak appeared in the vibration transmissibility curve near 17 Hz on the high frequency side of the natural frequency f ₀ . In this specimen, ((S1 + S2) / S) is 0.21, and (s1 / s2) is 0.3.

In the fifth and sixth tests, the test specimens used were the positions where the first type foam projections 3a were arranged on the upper plate surface of the flat plate part 2 and the second type foam projections 3b were flat plate parts. Since the anti-vibration material was arranged so as not to overlap with the position arranged on the lower plate surface of 2 in plan view, both showed good natural frequencies. However, in the sixth test, since (s1 / s2) of the test body used was 0.3, the first-type foam convex portion 3a caused bottoming due to compression, and the natural frequency in the vibration transmissibility curve. A peak appeared near 17 Hz on the high frequency side of f _{0, and} the vibration isolation effect was inferior to the result of the fifth test. Even if the comparison result of the fifth and sixth tests satisfies the requirement of ((S1 + S2) / S) of the present invention, if the value of (s1 / s2) is too small, It shows that there is a difference in the excellent anti-vibration effect, which may have a bad influence. The sixth test result shows that the first type of foam protrusion and / or the second type of foam protrusion causes bottoming due to significant compression, that is, ((S1 + S2) / S). When the value of is too small, it is suggested that the anti-vibration effect is inferior.

DESCRIPTION OF SYMBOLS 1 Anti-vibration material 2 Synthetic resin foam flat part 3a 1st type foam convex part 3b 2nd type foam convex part 4 Anti-vibration rubber 5a Foundation concrete floor 5b Floating concrete floor 6 Plywood 10 Anti-vibration floor 11 Anti-vibration floor Materials 11A First synthetic resin foam plate 11B Second synthetic resin foam plate 12a Synthetic resin foam flat plate portion 12b Synthetic resin foam flat plate portion 13a First type foam convex portion 13b Second type foam convex shape Part 14 Anti-vibration rubber 15a Foundation concrete floor 15b Floating concrete floor 20 Anti-vibration floor

Claims (7)

  A floor structure of a structure, a vibration isolation material laid on the floor base, and a vibration isolation floor structure disposed on the vibration isolation material, wherein the vibration isolation material comprises: At least one synthetic resin foam flat plate portion and a plurality of synthetic resin foam convex portions disposed on the plate surface of the flat plate portion, wherein the plurality of synthetic resin foam convex portions are upper plates of the flat plate portion. A first type foam convex portion arranged in contact with or fixed to the surface and a second type foam convex portion arranged in contact with or fixed to the lower plate surface of the flat plate portion; The position where the first type foam protrusion is disposed on the upper plate surface of the flat plate portion and the position where the second type foam protrusion is disposed on the lower plate surface of the flat plate portion are flat. The synthetic resin foam convex portions are arranged on the plate surface of the flat plate portion so as not to overlap with each other, and the area S of the plate surface of the synthetic resin foam flat plate portion is The total area S1 of the area s1 of the upper surface of the convex portion of the first type foam convex portion arranged on the upper plate surface of the flat plate portion and the second type foam convex portion arranged on the lower plate surface of the flat plate portion The ratio ((S1 + S2) / S) of the total area to the total area S2 of the area s2 of the upper surface of the convex part of the part is 0.15 or more, and the ratio (s1 / s2) of s1 to s2 is 0.3 to An anti-vibration floor structure characterized by being 3.5.   The first type foam protrusions arranged in contact with or fixed to the upper plate surface of the synthetic resin foam flat plate portion are arranged so as to form square lattice points, and the lower plate surface of the flat plate portion. 2. The vibration-proof floor structure according to claim 1, wherein the second-type foam protrusions disposed in contact with or fixed to the square are disposed at the intersections of the diagonal lines of the square. .   The anti-vibration floor structure according to claim 1 or 2, wherein an anti-vibration rubber is attached to an appropriate position of the flat plate portion of the synthetic resin foam so as to penetrate the flat plate portion.   The said synthetic resin foam flat plate part and said 1st type and 2nd type foam convex part are polyolefin-type resin foaming particle type | molding bodies in any one of Claims 1-3 characterized by the above-mentioned. Anti-vibration floor structure as described.   The said synthetic resin foam flat plate part and said 1st type and 2nd type foam convex part are crosslinked polyethylene-type resin foaming-particles in-mold molded objects, The any one of Claims 1-3 characterized by the above-mentioned. Anti-vibration floor structure as described in 1.   At least one synthetic resin foam flat plate portion and a plurality of synthetic resin foam convex portions disposed on the plate surface of the flat plate portion, wherein the plurality of synthetic resin foam convex portions are upper plates of the flat plate portion. A first type foam convex portion arranged in contact with or fixed to the surface and a second type foam convex portion arranged in contact with or fixed to the lower plate surface of the flat plate portion; The position where the first type foam protrusion is disposed on the upper plate surface of the flat plate portion and the position where the second type foam protrusion is disposed on the lower plate surface of the flat plate portion are flat. The synthetic resin foam convex portions are disposed on the plate surface of the flat plate portion so as not to overlap with each other, and the upper plate surface of the flat plate portion with respect to the area S of the plate surface of the synthetic resin foam flat plate portion The total area S1 of the upper surface area s1 of the first type foam protrusions disposed on the lower surface of the flat plate portion and the second type The ratio ((S1 + S2) / S) of the total area with the total area S2 of the area s2 of the upper surface of the convex part of the body convex part is 0.15 or more, and the ratio (s1 / s2) between s1 and s2 is 0.00. An anti-vibration material, which is 75 to 1.25.   The first type foam protrusions arranged in contact with or fixed to the upper plate surface of the synthetic resin foam flat plate portion are arranged so as to form square lattice points, and the lower plate surface of the flat plate portion. The anti-vibration material according to claim 6, wherein the second-type foam protrusions arranged in contact with or fixed to the square are arranged at the intersections of the diagonal lines of the square.

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