JP3159295U - Anti-vibration material, anti-vibration floor structure using the anti-vibration material - Google Patents

Abstract

An anti-vibration material having vibration-proof performance equal to or higher than that of a conventional anti-vibration material, excellent in lightness and workability, and easy to manufacture. Further, the present invention provides an anti-vibration floor structure that is easy to construct using the anti-vibration material and has excellent anti-vibration characteristics. The vibration isolator 1 comprises a synthetic resin foam flat plate and a plurality of polyolefin resin foam convex portions 3 arranged at predetermined intervals on one side of the flat plate. Is a columnar shape, and the height of the convex portion 3 is 25% or more of the thickness of the vibration isolator 1. [Selection] Figure 4

Description

  The present invention relates to a vibration-proof material and a vibration-proof floor structure using the vibration-proof material.

  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. And has problems in vibration proofing performance, productivity, and limit on 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.

  The inventor has proposed a vibration-proof material for solving the above-mentioned problem (Patent Document 1). The anti-vibration material of Patent Document 1 is provided with a plurality of anti-vibration rubbers provided with a predetermined interval portion, and a synthetic resin foam and a plate material or a net material are laminated and arranged in the interval portion. The vibration isolating material has a configuration in which a foam, a vibration isolating rubber, and a plate material or a net material are integrated.

  The anti-vibration material of Patent Document 1 is capable of factory production 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-based 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.

  However, the vibration-proof material described in Patent Document 1 still leaves room for improvement in terms of lightness, ease of manufacture, and the like.

Japanese Patent Laid-Open No. 9-242314

  An object of the present invention is to provide an anti-vibration material that has an anti-vibration performance equivalent to or higher than that of a conventional anti-vibration material, is excellent in lightness and workability, and is easy to manufacture. Another object of the present invention is to provide an anti-vibration floor structure that is easy to construct using the anti-vibration material and has excellent anti-vibration characteristics.

According to the present invention, the following vibration isolator is provided.
[1]
It is composed of a synthetic resin foam flat plate and a plurality of polyolefin resin foam convex portions arranged at predetermined intervals on one side of the flat plate, and the shape of the convex portion is columnar, and the height of the convex portion Is 25% or more of the thickness of the vibration isolator.
[2]
2. The vibration isolator according to 1, wherein the vibration isolator has a thickness of 25 mm or more.
[3]
Wherein the tip of the convex portion plane is provided, the total area of the flat surface is proof material 1 m ² per 500～3000Cm ^2, vibration-proof material according to the 1 or 2.
[4]
The shape of the convex part is one or more kinds of columnar shapes selected from a cylindrical shape, a polygonal column, a truncated cone shape, a truncated polygonal truncated cone shape, or a shape in which a part thereof is cut out. Anti-vibration material as described.
[5]
The convex portion is a cross shape in plan view, and is a combination shape of one rectangular plate or square plate standing upright and two right triangular plates joined to each of both planes of the rectangular plate. The right triangle plate is a columnar shape having a shape in which one of two surfaces forming a right angle portion is a bottom surface, and the other is joined to a vertical plane of the flat plate and vertically stands. The vibration-proof material in any one.
[6]
6. The vibration-proof material according to 5 above, wherein an inclination angle of a right triangle plate-shaped portion constituting the convex portion is 45 degrees or more.
[7]
The anti-vibration material according to any one of 1 to 6, wherein an anti-vibration rubber having a dynamic spring constant smaller than a dynamic spring constant of the convex portion is attached through the flat plate.
[8]
The vibration-proof material according to any one of 1 to 7, wherein the base material of the convex portion is a crosslinked polyethylene resin.
[9]
The vibration-proof material according to any one of 1 to 7, wherein a base material of the convex portion is a polypropylene resin.
[10]
The vibration isolator according to any one of 1 to 7, wherein the base material of the convex portion is a styrene-modified polyolefin resin.
[11]
The vibration isolator according to any one of 1 to 10, wherein the flat plate and the convex portion are formed by in-mold integral molding of polyolefin resin foam particles.
[12]
On the foundation concrete floor, the vibration-proof material according to any one of 1 to 11 is laid with the polyolefin resin foam convex part facing down, and the concrete floor is placed thereon. Anti-vibration floor structure.

Since the vibration isolator of the present invention is composed of a combination of a synthetic resin foam flat plate and a specific polyolefin resin foam convex portion, the vibration isolator is placed between the foundation concrete floor and the concrete floor. By laying the polyolefin resin foam convex part downward, it is possible to form a space by an air layer around the convex part, so a simple floating floor type anti-vibration floor with excellent anti-vibration characteristics The structure can be easily constructed. In addition, the vibration-proof performance can be easily adjusted.
In the vibration isolator of the present invention, the polyolefin resin foam convex portion is a polypropylene resin, a styrene-modified polyolefin resin, particularly a cross-linked polyethylene resin, so that it has excellent flexibility and durability, and is vibration-proof. Excellent performance.
In addition, the synthetic resin foam flat plate and the polyolefin resin foam convex portion are formed by in-mold integral molding of foam particles, so that they are particularly excellent in productivity, durability, and vibration proof performance. Become.
The anti-vibration floor structure of the present invention is easy to construct, and has an anti-vibration characteristic because it has a space composed of an air layer by using the anti-vibration material having a specific structure.

FIG. 1 is a plan view showing an example of the vibration isolator of the present invention. Fig.2 (a) is a front view of the vibration isolator shown in FIG. FIG.2 (b) is a side view of the vibration isolator shown in FIG. FIG. 3 is a rear view of the vibration isolator shown in FIG. FIG. 4 is a perspective view showing an example of the vibration isolator of the present invention. FIG. 5A is an enlarged perspective view showing an example of a polyolefin resin foam convex portion. FIG. 5B is an enlarged perspective view showing another example of the polyolefin resin foam convex portion. FIG. 6 is a longitudinal sectional view showing an example of a vibration-proof floor structure. FIG. 7 is a graph showing the anti-vibration effect in the anti-vibration floor using the anti-vibration material according to the embodiment of the present invention.

Hereinafter, the vibration isolator of the present invention will be described in detail with reference to the drawings.
1 is a plan view showing an example of the vibration isolator of the present invention, FIG. 2 (a) is a front view thereof, FIG. 2 (b) is a side view thereof, FIG. 3 is a rear view thereof, and FIG. FIG. 5A is an enlarged perspective view showing an example of the convex portion, and FIG. 5B is an enlarged perspective view showing another example of the convex portion.

  In the figure, 1 is a vibration isolating material of the present invention, 2 is a synthetic resin foam flat plate, 3 is a polyolefin resin foam convex portion, and 3a is a rectangular plate or square plate constituting the polyolefin resin foam convex portion ( 3b is a right triangle plate constituting the polyolefin resin foam convex portion, 3c is a plane of the square plate, and 3d is an upper surface of the square plate 3 (a plane at the tip of the convex portion). 3e represents the bottom surface of the right triangle plate, and 4 represents a vibration-proof rubber.

  As shown in FIG. 1, FIG. 2, and FIG. 4, the vibration isolator 1 of the present invention has a plurality of polyolefins arranged at predetermined intervals on one side of the synthetic resin foam flat plate 2 and the flat plate 2, as shown in FIGS. And the resin-based resin foam convex portion 3.

  The thickness of the anti-vibration material 1 is preferably 25 mm or more in order to maintain a sufficient anti-vibration material volume and a space volume for anti-vibration in the anti-vibration floor structure and to exhibit excellent anti-vibration performance. From this viewpoint, it is more preferably 30 mm or more, and still more preferably 50 mm or more. If the thickness is too thick, a space such as a residence is narrowed in a building of a certain size, so the upper limit is preferably 150 mm, more preferably 100 mm. Moreover, it is preferable that the vibration isolator 1 is a square or a rectangular plate shape, and specifically, the thing of 900-2000 mm long and 600-1500 mm wide is preferable.

  The height of the convex part 3 is 25% or more of the thickness of the vibration isolator 1, preferably 40% or more, and more preferably 50% or more. If the proportion of the height of the convex portion 3 is too small, sufficient vibration-proofing properties cannot be obtained. In addition, since the upper limit of the height of the convex part 3 needs to ensure the intensity | strength of the whole vibration isolator, it is about 85% of the thickness of a vibration isolator.

The tip of the convex portion 3 is preferably formed as a flat surface because it is excellent in stability when constituting a vibration-proof floor structure described later. Its case, the total area of the plane of the tip is, 500～3000Cm ² is preferably per proof material 1 m ^2, more preferably 800~2000cm ^2. If the total area is too small, the amount of distortion of the vibration-proof material when placing the pressing concrete is increased, and the workability and the like may be reduced. On the other hand, if the total area is too large, there is a risk of inhibiting the vibration isolation performance.

The number of the convex portions 3 is preferably 160 to 200 per 1 m ^{2 of the} vibration isolating material in order to develop good vibration isolating performance although it depends on the shape of the convex portion and the like. If the number of the convex portions 3 is too large, the strength of one convex portion is lowered and easily broken, and manufacturing becomes difficult. If the number of the convex portions 3 is too small, it becomes difficult to evenly support the load applied from the pressing concrete in the vibration-proof floor structure described later.

  The shape of the convex portion 3 is not particularly limited as long as it is a column shape that can support the flat plate 2 such as a cylinder, a prism, a cone, a pyramid, a truncated pyramid, and an inverted truncated pyramid, but it is easy to manufacture, has excellent strength, and is not easily damaged From the above, it is preferable to be one or more columnar shapes selected from a cylindrical shape, a polygonal column, a truncated cone shape, a polygonal frustum shape, or a shape in which a part thereof is cut out. Among these, a truncated cone shape and a polygonal frustum shape are preferable because stronger elasticity is exhibited as they are compressed.

Other than that, for the reason that a high vibration-proof performance can be realized with a small volume with respect to the vibration in the horizontal direction, front and rear, left and right, and vertical vibration, FIG. 1, FIG. 2, FIG. 4, FIG. A columnar shape having a cross shape in plan view as shown in FIG. Further, as shown in FIG. 5 (a), it has a combination shape of a single flat plate 3a erected vertically and two right triangular plates 3b joined to both flat surfaces 3c of the flat plate 3a. As for 3b, convex part 3 which stands upright by joining one side of two sides which form a right angle part as bottom 3e, and joining the other to perpendicular plane 3c of this flat plate is preferred. In particular, as shown in FIG. 5, it is preferable that the inclination angle θ of the right triangle plate is 45 degrees or more, and further 45 to 60 degrees in the convex portion 3 in order to express particularly excellent anti-vibration performance. Moreover, as a shape of the convex part 3, as shown in FIG.5 (b), the thing of the shape which notched the flat plate 3a and was made into the right triangle similar to the right triangle plate 3b is also one of the preferable aspects.
In addition, as the arrangement state of the convex portions 3, it is preferable to arrange them at equal intervals. In the case of the convex portions 3 having different vertical and horizontal shapes as shown in FIG. As shown in FIG. 2 and FIG. 4, it is preferable to rotate 90 ° horizontally for each adjacent convex portion 3 because the load of pressing concrete can be evenly supported. As a result, the load capacity can be increased and the space volume for vibration isolation can be increased.

In addition, if the upper surface 3d of the flat plate is a flat surface at the tip of the convex portion, and the total area of the upper surface 3d of the flat plate is 500 to 3000 cm ² per 1 m ^{2 of the} vibration damping material, it is preferable from the viewpoint of load bearing performance and vibration damping performance. Part.

  As shown in FIG. 1, FIG. 2, FIG. 3, and FIG. It is preferable that it is attached through. This anti-vibration rubber 4 can improve the load resistance of the anti-vibration material 1.

  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, and specifically, a natural rubber or the like can be adopted. The dynamic spring constant is a value obtained from the natural frequency obtained by the sine wave excitation method based on the measurement method defined in JIS A6321.

  The anti-vibration rubber 4 may be arranged irregularly, but is preferably arranged regularly such as at equal intervals. When the anti-vibration rubber 4 is regularly arranged, when the concrete is placed on the flat plate 2 of the anti-vibration material 1 to form an anti-vibration floor structure, the load of the pressing concrete is equal to the anti-vibration material 1 Therefore, local deformation and breakage of the vibration isolator 1 can be prevented, and the structure has excellent durability.

  The interval at which the anti-vibration rubber 4 is disposed is preferably 100 to 500 mm, more preferably 150 to 350 mm, from the viewpoint of improving load bearing performance.

  The thickness of the anti-vibration rubber 4 is preferably equal to the thickness of the anti-vibration material 1 and the shape thereof is not limited. 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 of attaching the anti-vibration rubber 4, there is a method in which a hole having a horizontal cross-sectional shape of the anti-vibration rubber 4 is formed in a flat plate, and the anti-vibration rubber 4 is inserted into the hole. When the horizontal cross section is a square or a rectangle and the shape of the convex portion 3 is as shown in FIG. 5, the plate 3a and the right triangle plate 3b constituting the convex portion 3 are used to make these plates 3a, It is possible to form a hole in the portion of the flat plate 2 surrounded by 3b and extend the plates 3a and 3b to form a wall surrounding the hole with the same thickness as these plates (not shown). This is preferable because the rubber 4 can be firmly fixed.

  As the base resin constituting the synthetic resin foam flat plate 2, polyethylene resin (low density polyethylene, linear low density polyethylene, high density polyethylene), polypropylene resin (ethylene-propylene random copolymer, butene-propylene). Random copolymers, ethylene-propylene block copolymers, butene-propylene block copolymers, ethylene-propylene-butene random copolymers, polypropylene), polyolefin resins such as styrene-modified polyolefin resins, other polystyrene, High impact polystyrene, styrene copolymer resin, phenol resin, vinyl chloride resin, polycarbonate resin and the like can be used. These base resins may be either crosslinked or non-crosslinked.

  Examples of the method for producing the flat plate 2 include conventionally known methods such as an extrusion foaming method using the above-described resin and a method of in-mold molding using foamed particles. Among them, the obtained vibration-proof material is excellent in flexibility and strength, has high water resistance, and has a small repeated compression set. Therefore, a foamed particle in-mold molding method using a polyolefin resin is preferable, and a crosslinked polyethylene resin foam is used. A foamed particle in-mold molding method using particles is more preferred.

  The base resin constituting the polyolefin resin foam convex part 3 is excellent in flexibility and strength, has high water resistance, and has a small repeated compression set. Therefore, a polyethylene 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 copolymers, polypropylene), and polyolefin resins such as styrene-modified polyolefin resins. These base resins may be either crosslinked or non-crosslinked. In addition, the polyolefin-type resin in this specification means what contains 30-100 weight% of olefin components in resin. The amount of the olefin component in the polyolefin resin is preferably 50 to 100% by weight, more preferably 80 to 100% by weight.

  Among the polyolefin resins, a crosslinked polyethylene resin, a polypropylene resin, and a styrene-modified polyolefin resin are preferable, and a crosslinked polyethylene resin is most preferable from the viewpoint of vibration-proof performance.

As a manufacturing method of the convex part 3, the cutting secondary process of a foam, the in-mold shaping | molding method using an expanded particle, etc. are mentioned. As a method of arranging the convex portion 3 on the flat plate 2, the flat plate 2 and the convex portion 3 can be manufactured separately and integrated using an adhesive or the like, but the flat plate 2 and the convex portion 3 are integrally formed. In addition, the foamed particle in-mold molding method is preferred because it can be expected to improve the vibration proof performance by the integral molding.
Therefore, the vibration-proof material comprising the in-mold integrated molded body of the crosslinked polyethylene-based resin expanded particles exemplified as the most preferable embodiment is excellent in water resistance, vibration-proof performance, durability, workability, and productivity, and is also vibration-proof. The performance can be easily adjusted by changing the thickness, the shape of the convex portion, etc., so that it becomes a good vibration isolator having all excellent effects.

The apparent density of the flat plate 2 is preferably 15 to 60 kg / m ³ , and the apparent density of the convex portion 3 is preferably 20 to 50 kg / m ³ . When integral molding is performed by the foam particle in-mold molding method, the flat plate 2 is formed by integral molding of foam particles having different apparent densities by so-called dual density molding as described in JP-A-2001-150471. And a vibration-proof material having different apparent densities of the convex portions 3 can be obtained.

  The anti-vibration material of the present invention includes anti-vibration materials for floors used in houses, basements, parking lots, heavy equipment foundation floors, studios, etc .; anti-vibration materials for walls used in houses, buildings, studios, etc .; precision equipment Anti-vibration material for vibration isolation used as a base for things that dislike vibration, etc .; Anti-vibration material for the purpose of vibration isolation for railways, subways, etc .; Anti-vibration material for vibration absorption of construction vehicles and machinery It can be used for applications such as, and has excellent vibration and sound insulation properties.

  Next, a vibration-proof floor structure using the vibration-proof material of the present invention will be described. FIG. 6 is a longitudinal sectional view showing an example of the vibration-proof floor structure of the present invention. As shown in the figure, the anti-vibration floor structure of the present invention has the above-described anti-vibration material 1 laid on the basic concrete floor 11 with the convex portion 3 facing downward, and the pressing concrete 12 on the flat plate 2. It is the structure which provides the concrete floor which consists of. The structure can be constructed by placing a foundation concrete floor, laying the anti-vibration material 1 thereon so that the convex portion 3 faces downward, and placing the pressing concrete 12 thereon. .

  The floating floor type anti-vibration floor structure is a structure in which the space between the foundation concrete floor 11 and the concrete floor made of the pressing concrete 12 is an air layer only space. If there is no transmission of vibration, ideal vibration isolation characteristics will be exhibited. The present invention simply realizes the floating floor type anti-vibration floor structure. In the anti-vibration floor structure of the present invention, as shown in FIG. 6, the anti-vibration material 1 supports the pressing concrete 12, and an air layer space is formed around the convex portion 3. Is expressed.

  As for the foundation concrete floor 11 and the presser concrete 12 itself, any known techniques for the foundation concrete floor and the presser concrete in the conventional vibration-proof floor structure can be applied.

  As a method of placing concrete on the vibration-proof material 1 laid on the foundation concrete floor 11, a known method or the like that has been conventionally adopted for the construction of this type of vibration-proof floor can be applied.

  Using the anti-vibration material of the present invention, the anti-vibration floor structure was made and the anti-vibration effect was measured.

Example 1
1, 2, 4, and 5 (a), an anti-vibration material (width 900 mm, length 1200 mm, thickness 50 mm, convex height 25 mm, convex the number of parts 178 / ^{m 2,} the total area 1200 cm ² of the projection end plane per proof material 1 m ^2, an apparent density of 35 kg / ^{m 3,} to obtain rubber cushion load bearing heavy 800kg / ^{m 2).}

  Next, as shown in FIG. 6, on the foundation concrete floor, a combination of the vibration-proof material and the half of the length of the vibration-proof material is combined, and the convex portion is on the bottom, and the width is 900 mm × length Laying in the range of 1800mm in length, placing concrete so that a pressing concrete layer (width 900mm x length 1800mm x thickness 150mm) is formed on it, anti-vibration floor for measuring vibration and sound insulation performance A structure was produced. FIG. 7 shows the measurement results of the vibration-proof and sound-proof performance of the obtained vibration-proof floor structure.

Comparative Example 1
The anti-vibration material is the same as in Example 1 except that glass wool having a width of 900 mm, a length of 1200 mm, and a thickness of 50 mm is used instead of the anti-vibration material comprising the crosslinked polyethylene expanded particle in-mold molded body of Example 1. A bed structure was prepared. The vibration-proof floor structure thus obtained was water-absorbing and inferior in water resistance because the vibration-proof material was glass wool. Further, when placing the pressing concrete, the upper surface of the glass wool must be covered with a resin film in order to prevent water absorption of the glass wool, which is inferior in workability. FIG. 7 shows the measurement results of the vibration-proof and sound-proof performance of the obtained vibration-proof floor structure.

Comparative Example 2
Instead of the anti-vibration material made of the crosslinked polyethylene expanded particle in-mold integrally molded product of Example 1, a sheet-like expanded polystyrene compressed product having a width of 900 mm, a length of 1200 mm and a thickness of 50 mm (compressed foamed polystyrene having a foaming ratio of 100 times to compress bubbles). An anti-vibration floor structure was produced in the same manner as in Example 1 except that the anti-vibration material was used. The resulting anti-vibration floor structure is easy to break because the anti-vibration material is foamed polystyrene, and the upper surface of the foamed polystyrene is covered with a resin film to prevent water absorption similar to the case of glass wool when placing the pressing concrete. It had to be inferior in workability. FIG. 7 shows the measurement results of the vibration-proof and sound-proof performance of the obtained vibration-proof floor structure.

Comparative Example 3
The anti-vibration material was the same as that of Example 1 except that the anti-vibration material having the same shape as that of Example 1 made of expanded polystyrene was used instead of the anti-vibration material made of the crosslinked polyethylene expanded particle in-mold integrally molded product of Example 1. A floor structure was produced. The obtained anti-vibration floor structure was easy to break because the anti-vibration material was foamed polystyrene, and the workability was poor. Since the obtained polystyrene foam material has an excessively large elastic modulus, even if it is a vibration-proof floor structure using a vibration-proof material provided with convex portions having the same shape as in Example 1, the vibration-proof and sound-proof performance is inferior. It was a thing.

Comparative Example 4
Instead of the vibration isolating material comprising the cross-linked polyethylene expanded particle in-mold integrally molded product of Example 1, a plate-shaped cross-linked polyethylene expanded particle in-mold integrated product having a width of 900 mm, a length of 1200 mm, and a thickness of 50 mm was used as the anti-vibration material. Produced a vibration-proof floor structure in the same manner as in Example 1. The obtained anti-vibration floor structure was excellent in water resistance and workability, but was insufficient in anti-vibration and sound insulation performance.

Example 2
An anti-vibration floor structure was produced in the same manner as in Example 1 except that the height of the convex portion of the anti-vibration material made of the crosslinked polyethylene expanded particle in-mold integrally molded product of Example 1 was 10 mm. The obtained anti-vibration floor structure was excellent in water resistance and workability. Further, the vibration-proof and sound-proof performance of the obtained vibration-proof floor structure was the same as that of Comparative Example 2.

Example 3
The anti-vibration method was the same as in Example 1 except that the total area of the projection tip flat surface per 1 m ² of the anti-vibration material of the anti-vibration material consisting of the crosslinked polyethylene expanded particle in-mold molded body of Example 1 was 200 cm ² . A bed structure was prepared. The obtained anti-vibration floor structure was excellent in water resistance and workability. Further, the vibration-proof and sound-proof performance of the obtained vibration-proof floor structure was the same as that of Comparative Example 2.

In addition, the soundproofing and vibration isolating performance evaluation in this example was performed as follows.
The foundation concrete floor was vibrated with a vibrator, and a vibration meter was provided on the pressing concrete to measure the vibration level.
FIG. 7 shows a graph representing the measurement results with the horizontal axis representing the excitation frequency and the vertical axis representing the vibration transmissibility. The vibration transmissibility on the vertical axis in FIG. 7 is a value given by the following equation.
Vibration transmissibility (dB) = Vibration of foundation concrete floor on excitation side (dB)-Vibration of holding concrete on measurement side (dB)

  From FIG. 7, it can be confirmed that the anti-vibration floor structure of the present invention has a soundproofing and vibration-proofing performance equivalent to or higher than those made of a foamed polystyrene compression product or a glass wool vibration-proofing material.

DESCRIPTION OF SYMBOLS 1 Anti-vibration material 2 Synthetic resin foam flat plate 3 Polyolefin resin foam convex part 3a Flat plate which comprises polyolefin resin foam convex part 3b Right-angle triangle board which comprises polyolefin resin foam convex part 3c A rectangular board or square board Plane 3d Plane tip 3e Bottom face of right triangle plate 4 Anti-vibration rubber 11 Foundation concrete floor 12 Pressing concrete

Claims (12)

  It is composed of a synthetic resin foam flat plate and a plurality of polyolefin resin foam convex portions arranged at predetermined intervals on one side of the flat plate, and the shape of the convex portion is columnar, and the height of the convex portion Is 25% or more of the thickness of the vibration isolator.   The vibration isolator of Claim 1 whose thickness of the said vibration isolator is 25 mm or more. Wherein the tip of the convex portion plane is provided, the total area of the flat surface is proof material 1 m ² per 500～3000Cm ^2, vibration-proof material according to claim 1 or 2.   The shape of the said convex part is one or more types of column shape selected from the thing of the shape which notched the cylinder, the polygonal column, the truncated cone shape, the polygonal truncated cone shape, or those parts. Anti-vibration material as described in 1.   The convex portion is a cross shape in plan view, and is a combination shape of one rectangular plate or square plate standing upright and two right triangular plates joined to each of both planes of the rectangular plate. The right-angled triangular plate is a columnar shape in which one of two surfaces forming a right-angled portion is a bottom surface and the other is joined to a vertical plane of the flat plate and is vertically erected. The vibration-proof material in any one of.   The anti-vibration material according to claim 5, wherein an inclination angle of a right triangle plate-shaped portion constituting the convex portion is 45 degrees or more.   The anti-vibration material according to any one of claims 1 to 6, wherein an anti-vibration rubber having a dynamic spring constant smaller than the dynamic spring constant of the convex portion is attached through the flat plate.   The vibration isolator according to any one of claims 1 to 7, wherein the base material of the convex portion is a cross-linked polyethylene resin.   The vibration isolator according to any one of claims 1 to 7, wherein the base material of the convex portion is a polypropylene resin.   The vibration isolator according to any one of claims 1 to 7, wherein the base material of the convex portion is a styrene-modified polyolefin resin.   The vibration isolator according to any one of claims 1 to 10, wherein the flat plate and the convex portion are formed by in-mold integral molding of polyolefin resin foam particles.   On the foundation concrete floor, the vibration isolator according to any one of claims 1 to 11 is laid with the polyolefin resin foam convex part facing down, and the concrete floor is placed thereon. Anti-vibration floor structure.