JP2002276144A - Floor bearing leg for vibration isolation, and floor bearing structure using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart high vibration isolation properties to a floor bearing leg for use in setting a floor substrate on a floor slab, without damaging floor stiffness. SOLUTION: The floor bearing leg 1 includes a vibration isolation rubber 11 at a lower end thereof, which is formed like an inverted frusto-conical block with an inverted conical surface being formed like a concave circular surface. Further, the vibration isolation rubber 11 has a cylindrical bore 12 formed therein at the center thereof in a manner opening in a bottom surface thereof. According to the floor bearing leg 1 thus formed, while the vibration isolation rubber 11 ensures its compressive-expansive resistance against application of load to a high extent, it also ensures its vibration isolation properties to a possible highest extent by slightly degrading its rubber rigidity. As a result, both the stiffness of the floor borne by the floor bearing leg 1 and the high vibration isolation properties of the floor bearing leg 1 are coped with.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration floor support leg used for arranging a floor base on a floor slab in various buildings such as condominiums and office buildings.

[0002]

2. Description of the Related Art In general, a floor supporting leg of this kind is used for a vibration isolating rubber at a lower end, a height adjusting bolt having a lower portion embedded in the rubber isolating rubber, and a screw mounted on the bolt to rotate the bolt. A wide support block for supporting the floor substrate, in which a flexible nut is embedded and fixed, which makes it possible to adjust the rotation of bolts between adjacent floor substrates, and to both the lower surface of the outer peripheral end of the adjacent floor substrate. The floor support legs for vibration isolation are arranged at predetermined intervals so that the support blocks are straddled, and the height is adjusted by rotating the bolts from the gap between the floor foundations to secure the horizontal, and In the state where the bottom surface is placed in contact with the floor slabs that define the upper and lower floors of the building, the floor base is floated and supported on the floor slab.
This is, for example, a frusto-conical block shape. For example, a relatively hard rubber having a rubber hardness of 70 to 80 degrees is used.

[0003]

In this case, a considerable degree of vibration isolation is obtained, and it is possible to reduce to a certain extent the noise such as the vibration sound applied to the floor from being transmitted downstairs through the concrete floor slab. Although it is possible, its vibration isolation is not always satisfactory, and it is required to further improve the vibration isolation.

In this case, since the vibration isolation of the floor support legs generally depends on the vibration isolation performance of the rubber, the rubber hardness of the rubber is reduced, that is, the rubber is softened. When the rubber hardness is reduced, the rubber at the lower end of the floor support leg is easily deformed due to the floor load, and as a result, the floor support leg The support of the floor substrate floating and supported on the floor slab becomes unstable, and the floor rigidity required as a floor constituting a living space for humans is impaired. Therefore, while the improvement of vibration isolation is required, the necessary It is said that it is difficult to achieve this while maintaining the floor rigidity.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an anti-vibration floor capable of securing as high an anti-vibration property as possible without impairing floor rigidity. An object of the present invention is to provide a support leg and a floor support structure using the same.

[0006]

In consideration of the above problems, it has been found that the vibration-isolating rubber is formed into a frustum-inverted pyramid-shaped block shape and is formed at the center of the block shape in a vertical direction. By arranging the perforations of
The contact area of the rubber cushion with the floor slab is reduced,
The noise transmission to the floor slab due to the contact of the rubber is reduced.
That the anti-vibration performance can be improved, and that the truncated inverted conical shape reduces the cross-sectional area downward, thereby improving the resistance to compressive expansion against floor loading;
The perforations for shape keeping prevent the rubber rubber from compressing and expanding due to the floor load, and exhibit the shape keeping effect to secure the shape keeping properties. This has led to the finding that it is possible to both improve vibration isolation and secure floor rigidity.

[0007] The present invention has been made based on this finding, that is, the vibration isolating floor according to the first aspect of the present invention, which floats and supports a floor base on a floor slab via a rubber isolating rubber at a lower end. A support leg, wherein the anti-vibration rubber has a truncated inverted pyramid-shaped block shape having a truncated surface as a bottom surface, and a perforation for shape retention oriented vertically in a central position. A floor support leg for vibration isolation characterized by the following.

[0008] In addition to the above, the invention according to claim 2 provides:
By making the inverted cone surface in the above-mentioned truncated inverted cone-shaped block shape an inverted cone surface concavely fitted inside, the resistance to compression and expansion against the above-mentioned floor load is further improved, and it is effective for securing floor rigidity. Therefore, the vibration-proof rubber is provided with the floor support leg for vibration-proof according to claim 1, characterized in that the vibration-proof rubber is provided with a concave-fitted inverted conical surface on the inside. .

According to a third aspect of the present invention, in addition to the above, by forming the block shape using, for example, an inverted conical shape, the compression and expansion resistance to the floor load can be sufficiently obtained. This can be considered as a preferable rubber for the floor support legs.
3. The anti-vibration floor support leg according to claim 1 or 2, wherein the anti-vibration rubber has a block shape of a truncated inverted cone.

According to a fourth aspect of the present invention, in addition to the above, when the above-mentioned inverted conical body is used, the inverted conical surface is larger than the maximum diameter of the vibration isolating rubber, for example, 1.5 to 3 times. By making the shape of the perforations into a cylindrical shape with a circular arc surface having a relatively large radius, the resistance to the above-mentioned compressive expansion against the floor load and the above-mentioned shape retention can be made more preferable. The anti-vibration rubber is provided with an inverted conical surface formed by an arcuate surface which is larger than the upper surface of the maximum diameter and is concavely fitted inside with the center of the rubber being located at a distance from the bottom surface to the bottom surface. Has a cylindrical shape, and is a floor support leg for vibration isolation according to claim 3.

According to a fifth aspect of the present invention, in addition to the above, the rubber hardness of the vibration isolating rubber is reduced, so that the vibration isolating performance of the rubber is improved, and the vibration isolating performance of the floor support legs is improved. The anti-vibration rubber according to any one of claims 1, 2, 3, and 4, wherein the rubber has a rubber hardness of about 70 degrees or less so that the rubber can be exhibited as high as possible. It was used as a floor support leg.

According to a sixth aspect of the present invention, there is provided a floor support structure using the vibration-isolating floor support legs to provide a floor support structure in which noise transmission to downstairs is prevented as much as possible. A floor support structure characterized in that any one of the floor support legs for vibration isolation described in any one of (1) to (5) is used, and the floor base is floated and supported on the floor slab via the floor support legs. .

In the present invention, "truncated" means to cut a head (top) as a cone. In a reverse-cone-shaped block shape, the head is inverted to form a bottom surface. Corresponds to the part.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in more detail with reference to the drawings, wherein 1 is a floor support leg for vibration isolation, 11 is a rubber cushion at its lower end, 2 is a floor slab, 3 is a floor, Reference numeral 31 denotes a floor base, and the vibration-proof floor support legs 1 form a floor support structure that floats and supports the floor base 31 with respect to the floor slab 2 via the vibration-proof rubber 11 at the lower end. It is used for

That is, the vibration-proof floor support leg 1 is provided with a height-adjusting bolt 15 embedded and raised in the vibration-proof rubber 11 at the lower end thereof via a resin washer plate 14.
And a wide support block 17 for supporting the floor substrate 31 in which a nut 16 screwed to the bolt 15 and rotatable therewith is embedded and fixed. In addition, it is possible to adjust the rotation of the bolts 15 between adjacent base panels by means of a particle board, and at a predetermined interval so that the support block 17 is straddled on both lower surfaces of the outer peripheral end portions of the adjacent floor base 31. The support legs 1 are arranged, and bolts 15
By rotating the floor, the height is adjusted and horizontal is secured, and the floor base 31 is placed on the floor slab 2 with the bottom surface of the anti-vibration rubber 11 in contact with the floor slab 2 defining the upper and lower floors of the building. The floor 3 is used so as to form a floor support structure that floats and supports the slab 2. The floor 3 is, for example, a damping mat 32 on a floating floor base 31 that is floated and supported. For example, a floor plywood 33 having a veneer finish is laid and arranged to finish the floor, and this is configured.

At this time, the anti-vibration rubber 1 of the floor support leg 1
No. 1 has a truncated inverted pyramid-shaped block shape having a truncated surface as a bottom surface, and a hole 12 for retaining the shape which is oriented vertically in the center position. The anti-vibration rubber 11 has a block shape having a truncated inverted cone shape.

That is, as the vibration-proof rubber 11 of this embodiment, for example, a natural rubber-based rubber of which natural rubber or synthetic rubber is used to adjust the rubber hardness by mixing a predetermined amount of carbon powder with natural rubber is used. Then, it is formed, for example, by molding so as to form the above-mentioned inverted truncated cone, especially the inverted truncated cone, and at this time, the rubber cushion 11 is
In this example, it is assumed that a concave-fitted inverted conical surface with a concave fit is provided inside, and the concave-fitted inverted conical surface in the present example has a center located near the bottom surface or below the bottom surface, and is separated from the upper surface having the largest diameter. An inverted conical surface is formed by an arc surface concavely fitted inside with a large diameter, and the shape retaining hole 12 is formed in a cylindrical shape.

The anti-vibration rubber 11 of the present embodiment has, for example, an upper surface diameter of about 4 cm, a lower surface diameter of about 3 cm, and a height of 2.5 cm.
The concave-fitted inverted conical surface is arranged so that, for example, the entire surface of the anti-vibration rubber 11 in the vertical direction is an arcuate surface in which the outer conical surface is concavely fitted. The circular arc surface of the concave-inverted conical surface is, for example,
The center P is arranged so as to be located on an extension line extending laterally from the bottom surface of the rubber, and the radius is set to a radius of about 1.5 to 3 times the diameter of the upper surface which forms the maximum diameter of the vibration-isolating rubber 11. A large arc surface, approximately twice as large in this example, forms a true circular arc surface having a radius of 7 to 8 cm in this example.

The shape retaining hole 12 has, for example, a diameter of about 1.5 cm and a height, that is, a depth from the bottom of about 1.5 to 2 cm, and in this example, about 1.7 cm. There is a cylindrical hole which is opened at the bottom in a cylindrical shape having the same diameter in the vertical direction. At this time, the perforation 12 of this embodiment is provided at its upper end, that is, at the tip in the depth direction, for example, for embedding the bolt 15, for example. It communicates with the lower surface of the upper bolt receiving hole 13 having a small diameter of about 7 mm corresponding to the diameter of the bolt 15 at a center position thereof. Due to the small diameter of the hole 13, the operation of the perforation 12 is not impaired by the communication.

At this time, the rubber rubber of the vibration-proof rubber 11 of this embodiment has a rubber hardness of about 70 degrees or less. In this embodiment, the rubber hardness is defined as the lower limit of the rubber hardness of the conventional vibration-proof rubber. Less than 70 degrees, preferably 68 degrees or less, which satisfies both the anti-vibration property and the strength as the anti-vibration rubber, for example, 65 degrees ± 3 degrees. The block is molded so as to have a rubber hardness of, for example, about 65 degrees, which is most preferable for securing the strength.
Is somewhat softened so that its vibration isolation can be highly secured.

The anti-vibration rubber 11 thus formed is provided at the lower end of the floor support leg 1 so that the floor support leg 1 is provided with a high degree of vibration isolation.
The floor substrate 31 is placed on the floor slab 2 via the floor support leg 1 such that the bottom surface of the cutting surface is placed in contact with the floor slab 2.
The floor 3 is formed by finishing the floor by forming a floor support structure that floats from the floor, and the floor support 31 is supported by the floor support legs 1 at this time.
Adhesive layer 1 for temporary fixing exposed by peeling 9
The floor support leg 1 is temporarily fixed to the lower surface of the floor base 31 via, for example, two end portions of the outer periphery with the support block 17 protruding sideways from the end portion, and the underfloor disposed in advance. Ground 3
1, the supporting block 17 which similarly projects laterally,
The lower surface of the end on the non-installation side of the support block is arranged so as to be placed and temporarily fixed, and the adjacent floor base 31 is similarly arranged by the support block 17 protruding to the side, and if necessary, screws or the like are used. The fixing is performed by the fixing bracket 20 and the adjustment of the horizontal bolt 15 is performed.

The floor support leg 1 for vibration isolation according to the present embodiment includes
By lowering the rubber hardness of the rubber and softening it, the vibration absorption of the vibration isolating rubber 11 can be made as high as possible.
In addition to the fact that the anti-vibration rubber 11 has the truncated inverted conical shape and the contact area of the bottom surface is reduced, the noise transmission to the floor slab 2 is extremely highly prevented, and the ultimate anti-vibration property as a floor support leg is provided. The floor 3 using the floor supporting legs 1 has almost no possibility of noise transmission downstairs, and can be suitably applied to an apartment house or the like. It became.

On the other hand, the anti-vibration rubber 11 of the anti-vibration floor support leg 1 is
Truncated inverted cone having the cylindrical hole 12 for shape retention,
In particular, the cross-sectional area of the anti-vibration rubber 11 is reduced by forming the inverted cone into a block shape having a truncated inverted cone shape, and forming the inverted conical surface into a concave inverted conical surface which is concavely inwardly formed, particularly a concavely inserted inverted conical surface formed by an arc surface. As a result, the block shape of the anti-vibration rubber 11 itself has compression-expansion resistance, and the cylindrical perforations 12 have a high height. As a result of exhibiting a good shape-retaining effect, the compression-expansion of the vibration-isolating rubber 11 due to the floor load is prevented, the shape of the block shape is surely maintained, and the above-mentioned compression-expansion resistance is extremely high. The floor 3 using the legs 1 ensures a high level of floor rigidity. Therefore, even when a large shock is instantaneously received, the vibration isolator has an extremely high level of vibration isolation without impairing the floor rigidity. Floor support leg or floor support using it It can be a structure.

Incidentally, a load was applied to the single floor support leg 1 and the amount of deflection of the vibration isolating rubber 11 was measured. As a result, the load was 5.5 mm and 200 kg under a load of 100 kg.
It was confirmed that it had a high compression-expansion resistance under the load of, and even if the load received by the single floor support leg 1 on the general floor 3 was taken into consideration, In the floor 3 using the floor supporting legs 1, the resistance to compression and expansion and the floor rigidity due to this can be ideally ensured.

In the figure, reference numeral 4 denotes a circular ring made of a porous material such as a non-woven fabric, which is arranged so that the side surfaces thereof are in contact with the space between the floor slab 2 and the floor substrate 31, and a number of rings are provided inside and between the rings. In this example, a sound absorbing ring used and arranged so as to almost completely eliminate the possibility of noise transmission downstairs by continuously installing the sound absorbing space 41 of FIG.

Although the illustrated example is as described above, if the block shape of the vibration isolating rubber is a truncated inverted pyramid shape, this is appropriately changed to a truncated inverted polygonal pyramid shape, a truncated inverted pyramid shape, or the like. It must be in a shape. The anti-vibration rubber should not have a concave fit. For example, it should have a conical surface with an inclined inverted conical surface. When the concave-inverted conical surface of the vibration-isolating rubber is an arc surface, the arc surface is reduced to 1/4 circle or less.
In order to ensure a high level of compression and expansion resistance,
In addition to the position on the extension line of the bottom surface, an arc surface whose radius is larger than the maximum diameter of the vibration isolating rubber (the maximum length of a diagonal line or the like depending on the block shape setting) is used as the separation position near the bottom surface or below the bottom surface. The shape of the drilling shall be cylindrical, matching the outer periphery of the truncated inverted pyramid block, and the depth shall be as close as possible to the lower end of the bolt receiving hole. Although it is preferable to set it deeply, for example, a partition is arranged between the bolt receiving hole to prevent communication with the bolt receiving hole and to reduce the depth by a certain amount. In carrying out the present invention, the rubber support of the present invention has the same rubber hardness as before, and the vibration proof property is ensured by reducing the contact area with the floor slab. Floor slabs, anti-vibration rubber, its block shape,
The specific materials, shapes, structures, dimensions, numbers, their relationships, and additions to the perforations, inverted conical surfaces, and floor support structures using floor support legs may be various unless they violate the gist of the invention. It can be in the form.

[0027]

The present invention is configured as described above.
According to the first aspect of the present invention, the anti-vibration rubber has a truncated inverted pyramid-shaped block shape, and a perforation for vertically retaining the shape is arranged at a center position of the block shape. As a result, the contact area of the vibration isolating rubber to the floor slab is reduced, the noise transmission to the floor slab due to the contact of the vibration isolating rubber is reduced, and the vibration isolating property can be improved. The cross-sectional area is reduced downward by doing so, so that the resistance of the compression and expansion to the floor load can be improved, and the perforation for shape retention prevents the compression and expansion of the vibration isolating rubber due to the floor load, Demonstrating the shape-retaining effect of ensuring its shape-retaining properties, and by reducing the rubber hardness of the vibration-isolating rubber as necessary, it achieves both improved vibration-proofing and floor rigidity. As high as possible without damaging It is possible to provide a vibration isolating floor supporting legs you so that.

[0028] In addition to the above, the invention according to claim 2 provides:
By making the inverted conical surface in the block shape of the truncated inverted cone like the inverted conical surface concavely fitted inside, the resistance to the above-mentioned compressive expansion against the floor load is further improved and the floor rigidity is secured. To be performed.

According to a third aspect of the present invention, in addition to the above, by forming the block shape using, for example, an inverted conical shape, a sufficient resistance to compression and expansion against the floor load is also obtained. , And is preferable as a vibration-proof rubber for floor support legs.

According to a fourth aspect of the present invention, in addition to the above, when the above-mentioned inverted conical body is used, the inverted conical surface is larger than the maximum diameter of the vibration isolating rubber, for example, 1.5 to 3 times. By making the shape of the perforations into a cylindrical shape with a circular arc surface having a relatively large radius, it is possible to further improve the resistance to compression and expansion against the floor load and the shape retention described above. it can.

According to a fifth aspect of the present invention, in addition to the above, the rubber hardness of the vibration isolating rubber is reduced, the vibration isolating performance of the rubber is improved, and the vibration isolating property of the floor support legs is improved. It can be as high as possible.

According to the sixth aspect of the present invention, it is possible to provide a floor support structure in which noise transmission to the downstairs is prevented as much as possible by using the vibration-proof floor support legs.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a floor support leg.

FIG. 2 is a partially enlarged perspective view showing a vibration-proof rubber portion of a floor support leg.

FIG. 3 is an enlarged vertical sectional view of a vibration-proof rubber.

FIG. 4 is a longitudinal sectional view showing a floor support structure using floor support legs.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor support leg 2 Floor slab 3 Floor 11 Anti-vibration rubber 12 Drilling 15 Bolt 17 Support block 31 Floor base

Claims (6)

[Claims] 1. A floor supporting leg for floating a floor base on a floor slab via a vibration isolating rubber at a lower end, wherein the vibration isolating rubber has a truncated surface as a bottom surface. An anti-vibration floor support leg having an inverted cone-shaped block shape and having a shape-retaining perforation arranged in the center at a vertical position. 2. The floor support leg for vibration isolation according to claim 1, wherein said rubber is provided with a concave inverted conical surface which is concavely fitted inside. 3. The floor support leg for vibration isolation according to claim 1, wherein the vibration isolation rubber has a block shape of a truncated inverted cone. 4. The anti-vibration rubber is provided with an inverted conical surface formed by an arcuate surface which is larger than the upper surface of the maximum diameter and is concavely fitted inside with the center being a separation position near the bottom surface or below the bottom surface. 4. The floor support leg for vibration isolation according to claim 3, wherein the perforation has a cylindrical shape. 5. The floor support leg for vibration isolation according to claim 1, wherein the rubber hardness of the vibration isolation rubber is about 70 degrees or less. 6. A floor support is floated and supported on a floor slab through the floor support leg by using the floor support leg for vibration isolation according to any one of claims 1 to 5. Floor support structure.