KR20090084181A - Shock-absorbing structure with hollow part for building bottom - Google Patents

Abstract

The present invention relates to a buffer layer structure for a building floor having a hollow part.

The buffer layer structure for a building floor having a hollow part of the present invention includes: a support plate formed under the finishing mortar layer or the lightweight foam concrete layer and supporting an upper load; A cushioning material formed at a lower portion of the support plate; It is formed in the lower portion of the buffer, the lower portion is configured to be supported by the light-weight foam concrete layer or concrete floor layer, and the auxiliary buffer material consisting of a plurality of buffer protrusions to be spaced apart from each other to have a hollow portion inward.

According to the present invention, by installing a shock absorbing material under the support plate and forming a hollow part in the shock absorbing material, the dynamic elastic modulus is significantly lowered to 5 MN / m 3 or less, thereby improving vibration blocking performance. Improved, it is possible to prevent the phenomenon of breaking the lightweight foam concrete layer due to the installation of the cushioning material.

Description

SHOCK-ABSORBING STRUCTURE WITH HOLLOW PART FOR BUILDING BOTTOM}

The present invention relates to a buffer layer structure for a building floor, and a hollow portion formed in the buffer layer to lower the dynamic elastic modulus of the entire buffer layer to improve the vibration blocking performance.

As a technology relating to the structure of the buffer layer of a building, the inventors of the present invention have disclosed a method for producing a rubber antifoam rubber and a rubber antifoam prepared therefrom (Korea Patent Publication No. 10-0504148).

As described above, the technique of mixing a plurality of materials in a state in which it is difficult to thicken the floor thickness sufficiently, such as a multi-family house, has a buffering effect by lowering vibration transmission rate.

The above technique has been constructed in the form as shown in FIG.

More specifically, in the case of Figure 1 construct a buffer layer on the concrete floor layer 10, but the buffer layer is formed in the form of the support plate 50 and the buffer material 40 loaded up and down, the lightweight foam concrete layer 20 on the buffer layer Formed to increase the thermal insulation, the heating pipe 31 is installed thereon after finishing the mortar layer 30 was laid to the floor.

In addition, in the case of Figure 2 after forming the lightweight foamed concrete layer 20 on the concrete floor layer 10, there is formed a buffer layer of the same structure as in Figure 1 on it, after installing the heating pipe 31 thereon finishing mortar The floor 30 was constructed by forming layer 30.

The floor structure in which the buffer layer is installed as described above has a higher vibration blocking effect than the floor structure before the buffer layer is installed.

In addition, by installing the support plate 50 to prevent the occurrence of cracks in the lightweight foam concrete layer 20 or the finishing mortar layer 30 when the low-elasticity buffer material construction.

However, there is a problem that does not sufficiently block the vibration despite the installation of the cushioning material in the above form.

As a technique for improving such a problem, the 'layer floor impact reduction floor structure' (Korean Utility Model Publication No. 20-2007-0000350) has been disclosed.

As described above, the mount 60 is installed on the concrete floor 10 as shown in FIG. 3, and the support plate 50, such as a curable plate, is installed on the mount 60, and then a cushioning material such as a synthetic resin pad is disposed thereon. After installing 40, the lightweight foamed concrete layer 20 is formed, and then a heating pipe 31 is installed, and then a finishing mortar is poured to install the floor.

The above technique was to absorb light impact and weight impact primarily by using a synthetic resin pad having a dynamic modulus of 40 MN / ㎥.

However, the above technique has a problem that the dynamic modulus of elasticity of the entire buffer layer structure is not low enough to fall below the 5 MN / ㎥ standard set in the present invention.

In addition, lightweight foam concrete is weak in structural strength, even after fully cured, when a concentrated load occurs there occurs a phenomenon that breaks.

Therefore, it is necessary to prevent the lightweight foamed concrete from breaking above or below the lightweight foamed concrete.

By the way, in the case of the above design, the synthetic resin pad installed under the lightweight foam concrete is made of a material having low mechanical strength.

This is, after installing the synthetic resin pads on the bottom during the construction of the floor, the lightweight foamed concrete is poured, and then the lightweight foamed concrete layer is dried, and when the workers move on the lightweight foamed concrete layer 20, the light foamed concrete layer (20) Synthetic pad cannot structurally support the load applied to), resulting in the breakdown of lightweight foam concrete.

This causes the phenomenon that the floor is turned off, the phenomenon of water seeping into the lower concrete floor layer 10 occurs.

The buffer layer structure for the building floor having the hollow part of the present invention is to solve the problems caused in the prior art as described above. The elastic modulus is 5 MN / m 3 or less by installing the buffer part under the support plate and forming the hollow part in the buffer material. It is intended to improve vibration isolation performance by lowering it significantly.

In particular, it aims to improve vibration blocking performance for the low frequency band of 63 Hz.

In addition, it is intended to prevent the phenomenon of breaking the lightweight foam concrete layer due to the installation of the cushioning material.

The buffer layer structure for a building floor having a hollow portion of the present invention, in order to solve the above problems, and is formed on the bottom of the finishing mortar layer or lightweight foam concrete layer and supporting the upper load; A cushioning material formed at a lower portion of the support plate; It is formed in the lower portion of the buffer, the lower portion is configured to be supported by the light-weight foam concrete layer or concrete floor layer, and the auxiliary buffer material consisting of a plurality of buffer protrusions to be spaced apart from each other to have a hollow portion inward.

In addition, the metal thin film layer is formed under the auxiliary buffer.

At this time, the support plate is formed from 1 to 3 kinds of polypropylene, polyvinyl chloride, polyethylene as a raw material, or plywood, a wood powder press-molded plate with a binder, an inorganic powder press-molded plate with a binder, a wood powder with a binder And it is characterized by consisting of any one selected from the press-formed plate formed by mixing the inorganic powder and press-molded.

In addition, the support plate is characterized by any one of a single layer structure or a multi-layer structure.

On the other hand, the cushioning material is a foamed molding using one or two selected from natural rubber or synthetic rubber as a raw material, or 1 to 6 selected from polyurethane, polyolefin, polyethylene, polypropylene, polyvinyl chloride, ethylene vinyl acetate The foamed molded article is used as a raw material, or is formed of a polyester nonwoven fabric layer.

In addition, the auxiliary buffer material is a foamed molding using one or two selected from natural rubber or synthetic rubber, or 1 to 6 selected from polyurethane, polyolefin, polyethylene, polypropylene, polyvinyl chloride, ethylene vinyl acetate. It is characterized by using a foamed molded product as a raw material or formed of a polyester nonwoven fabric layer.

According to the present invention, by providing a shock absorbing material under the support plate and forming a hollow portion in the shock absorbing material, the elastic modulus of elasticity is significantly lowered to 5 MN / m 3 or less, thereby improving vibration blocking performance.

In particular, the vibration blocking performance for the low frequency band of 63 Hz band is improved.

In addition, it is possible to prevent the phenomenon of breaking the lightweight foam concrete layer due to the installation of the cushioning material.

Hereinafter, a buffer layer structure for a building floor having a hollow part of the present invention will be described in detail with reference to the accompanying drawings.

The buffer layer structure for a building floor having a hollow part of the present invention includes: a support plate 100 formed under the finishing mortar layer 30 or the lightweight foamed concrete layer 20 and supporting an upper load; A buffer member 200 formed at a lower portion of the support plate 100; It is formed under the buffer member 200, the lower portion is configured to be supported by the lightweight foam concrete layer 20 or the concrete floor layer 10, a plurality of buffers to be spaced apart from each other to have a hollow 310 inwardly It consists of; auxiliary buffer 300 formed of a projection (320).

Here, the feature is that the support plate 100 is installed on the top to support the lightweight foam concrete layer 20 or the finishing mortar layer 30 of the upper to break the collapse of the lightweight foam concrete layer 20 or the finishing mortar layer 30 Is to prevent it.

Another feature is that the auxiliary buffer 300 composed of a plurality of buffer protrusions 320 to form a hollow portion 310 spaced apart from each other in the lower portion of the buffer member 200 is configured to lower the dynamic elastic modulus of the entire buffer layer of the present invention Is that it is.

As a result, the dynamic modulus of elasticity of the entire buffer layer is remarkably improved compared to the conventional floor structure.

Hereinafter, each component of the present invention will be described in detail.

The support plate 100, which is a component of the present invention, is formed at the bottom of the finishing mortar layer 30 or the lightweight foamed concrete layer 20 as shown in FIG.

At this time, rather than having the lightweight foamed concrete layer 20 is located on the lower side of the support plate 100 as shown in Figure 7 it is structurally more stable that the lightweight foamed concrete layer 20 is located on the upper side of the support plate 100 as shown in FIG. And, to increase the stability of the finish mortar layer 30, it will be excellent in waterproof.

The support plate 100 serves as a pedestal for the finishing mortar layer 30 or the light-foamed concrete layer, in particular, the light-foamed concrete layer 20, which has weak mechanical strength, and thus destroys the light-foamed concrete layer 20 due to the local upper load. It is installed to suppress.

To this end, the support plate 100 may be formed of various materials, and preferably formed of a member having high strength so as to support the lightweight foamed concrete layer 20 which is relatively brittle.

To this end, the support plate 100 may be formed using one to three kinds of polypropylene, polyvinyl chloride, polyethylene.

In addition, it may be formed of any one selected from plywood, a pressurized molding plate to which a binder is added, a pressurized molding plate to which a binder is added, a pressurized molding plate to which a binder is added, and a powdered wood powder and an inorganic powder. have.

At this time, the thickness of the support plate 100 is preferably formed to a thickness between 0.5 mm to 50 mm.

If it is thinner than 0.5 mm, not only the support function is lowered, but also local deformation occurs, so that the upper lightweight foam concrete layer 20 or the finishing mortar layer 30 cannot be well supported.

In addition, if the thickness is thicker than 50 mm, not only economic efficiency is low, but also has a problem of narrowing the space for installing the member, such as the buffer 200 or auxiliary buffer 300.

The support plate 100 should maintain the strength while making the thickness as thin as possible, and should consider economics.

Therefore, although it may be formed in the form of a general flat plate, it is more preferable to form in a multi-wall form having a column using a member having a high strength.

That is, as shown in FIG. 8, the flat plate 110 is formed on the upper and lower portions, and the wall portion 120 is formed in the form of a multi-walled form, and the material is used even if an expensive member having high strength is used. It is possible to use a small amount of high economical members.

At this time, the shape of the wall portion 120 may be formed in a polygonal shape, such as a straight line, triangle, square, hexagon, etc. in addition to the lattice shown in the figure to further improve the structural strength.

The buffer member 200, which is a component of the present invention, is formed under the support plate 100 and has a flat plate structure.

The shock absorbing material 200 is formed to block the transmission of the vibration of the upper to the concrete floor layer 10 of the lower it is preferable to use a member having a lower elastic modulus than the support plate 100.

To this end, the cushioning material 200 is preferably formed by foam molding natural rubber or synthetic rubber, or foamed molding a mixed material of natural rubber and synthetic rubber.

In addition, a foamed product can be used as a raw material of polyurethane, polyolefin, polyethylene, polypropylene, polyvinyl chloride, ethylene vinyl acetate, or a mixed material of these two to six kinds.

In addition, it is also possible to use a mixture of one to eight kinds of foamed grinding materials selected from natural rubber, synthetic rubber, polyurethane, polyolefin, polyethylene, polypropylene, polyvinyl chloride, and ethylene vinyl acetate.

In addition, a polyester nonwoven layer may be used as the auxiliary buffer 300.

Auxiliary buffer 300 is a component of the present invention is formed under the buffer 200, the concrete floor layer 10 is located in the lower portion as shown in Figure 6, or lightweight foam concrete layer 20 as shown in FIG. And concrete floor layer 10 is located.

The auxiliary buffer 300 is composed of a plurality of buffer protrusions 320, the slow impactors 320 are configured to have a hollow portion 310 inwardly spaced apart from each other.

The buffer protrusion 320 may be formed in various forms such as a strip bar shape, a polygonal column or a columnar shape, a polygon, a column of upper and lower light or lower narrow light as shown in FIG. 5.

The configuration having the hollow portion 310 is related to the technical problem of the present invention, and through the structure having the hollow portion 310, the elastic modulus of elasticity of the buffer layer structure of the present invention is significantly reduced.

As a result, the vibration transmission force is reduced to increase the vibration insulation effect, and through the structure having the hollow part 310, the cost of the raw material is reduced by reducing the ratio of raw materials.

The auxiliary buffer 300 may be appropriately adjusted to the shape of the cross section and the ratio of the arrangement area according to the load or material of the structure located on the buffer layer.

As a specific example, the width or diameter of the auxiliary buffer 300, the interval between the auxiliary buffer 300 is preferably formed in the range of 1 ~ 20 cm.

If the width or diameter is 1 cm or less, the structure is unstable, and when set to 20 cm or more, there is a problem that the spacing is excessive and the practicality is inferior.

In addition, the thickness of the auxiliary buffer 300 is preferably formed about 0.5 ~ 10 cm.

When the auxiliary buffer 300 is 0.5 cm or less in thickness, the vibration blocking performance is lowered, 10 cm or more has a problem that the thickness is too thick to be difficult to apply.

Such auxiliary buffer 300 is preferably used that is foamed with natural rubber or synthetic rubber, or a foamed material using a mixed material of natural rubber and synthetic rubber as a raw material.

In addition, foamed molding may be used using polyurethane, polyolefin, polyethylene, polypropylene, polyvinyl chloride, ethylene vinyl acetate as raw materials, or two to six kinds thereof as raw materials.

In addition, a polyester nonwoven fabric may be used as the auxiliary buffer 300.

In addition, the buffer 200 and the auxiliary buffer 300 may be made of the same material, or may be integrally molded from the same material.

However, it will be most preferable that the auxiliary buffer 300 is configured to maximize the vibration blocking effect according to the difference of the material by using the member of the buffer material 200 and different materials.

In the above configuration, it is preferable to use a foam as the buffer material and the auxiliary buffer material as already described.

At this time, when the foaming ratio is lower than 2, the dynamic modulus of elasticity of the cushioning material is increased, so that vibration transmission characteristics are deteriorated, and raw material costs are increased for the same volume.

In addition, when the foaming ratio is higher than 80, the instability of the structure may be severe.

Therefore, the cushioning material and the auxiliary buffer material are formed of a foamable member, but it is preferable to use a foamed material having a foaming rate in the range of 2 to 80.

In the above configuration, all inorganic materials such as cement mortar, ceramics, and metal oxides radiate infrared rays at temperatures above 0 ° K, which are absolute temperatures, and the radiated infrared energy is proportional to the fourth power of the temperature.

Therefore, at room temperature of about 20 ℃ (293 ° K) a very large amount of infrared radiation from the concrete floor layer (10).

At this time, the wavelength of the infrared radiation is generally 2㎛ or more as shown in Figure 10, when the wavelength band of 2 ~ 20㎛ range is absorbed by the organic material (PE, PP, Urethane, EVA, etc.) will have a thermal action on the organic material It turns out that it acts to harden an organic substance.

That is, when the organic material is foamed to have elasticity, thermal curing occurs and adverse effects of increasing the elastic modulus appear.

In consideration of this point, the metal thin film layer 400 is formed under the auxiliary buffer 300 to prevent thermal radiation from entering the foamed organic material used as the buffer 200 or the auxiliary buffer 300 from the outside. It is desirable to prevent phenomena and to ensure the long life of the auxiliary buffer and cushioning material therefrom.

Experimental Example Measurement of Dynamic Elastic Modulus

In order to confirm the performance of the buffer layer structure for a building floor having a hollow part of the present invention configured as described above, two types of samples were prepared and measured.

First, prepare a fingerboard made of 200 mm wide, 5 mm thick, and polypropylene for comparison, and then install 22 mm of foam rubber on the entire support plate as a cushioning material under the support plate. Elastic modulus was measured.

In addition, as a test object, after preparing a support plate made of 200 mm thick, 5 mm thick, and polypropylene material, a buffer material of 200 mm wide, 12 mm thick, and foamed rubber material, such as a support plate, was installed under the support plate, and then The elastic modulus of elasticity was measured by applying an auxiliary buffer material having five strip bar-type cushioning protrusions having a width of 20 mm, a length of 200 mm, a thickness of 10 mm, a foam rubber material, and a thickness of 25 mm with an upper applied load of 90 kg /.

The measured values of dynamic modulus of elasticity of the comparative object and the experimental object are shown in Table 1 below.

TABLE 1 Dynamic modulus of elasticity

object Dynamic modulus of elasticity (MN / ㎥) Measures standard comparison target 12.3 5 Test subject 4.67 5

As shown in Table 1, when the buffer layer is formed in the form of a conventional flat plate, the elastic modulus value does not exceed the reference value, whereas the elastic modulus value does not exceed the reference value.

As described above, the building buffer layer having a hollow part of the present invention described above is not only used for the floor structure, but may be applied to various parts such as vibration blocking of a mechanical structure.

1 is a cross-sectional view showing an example of a conventional buffer layer structure.

2 is a cross-sectional view showing another example of a conventional buffer layer structure.

3 is a cross-sectional view showing another example of a conventional buffer layer structure.

Figure 4 is an exploded perspective view showing a buffer layer structure for a building floor having a hollow part of the present invention.

5 is a perspective view showing an example in which the auxiliary buffer is disposed on the bottom of the shock absorbing material in a direction in which the shock absorbing material is inverted.

(A): A perspective view showing an example in which the buffer protrusion of the auxiliary buffer material is formed in a strip bar shape.

(B): A perspective view showing an example in which the buffer protrusion of the auxiliary buffer material is formed in a horn shape.

Figure 6 is a cross-sectional view showing an example of the buffer layer structure for a building floor having a hollow part of the present invention.

Figure 7 is a cross-sectional view showing another example of the buffer layer structure for a building floor having a hollow part of the present invention.

8 is a perspective view showing an example of a support plate in the present invention.

9 is a sectional view showing an example in which the metal thin film layer is installed in the present invention.

10 is a graph showing the spectral radiation rate of metal oxides.

11 is a graph showing infrared absorption spectra for each resin.

<Detailed Description of Major Symbols in Drawing>

10: concrete floor layer 20: lightweight foam concrete layer

30: finishing mortar floor 31: heating piping

40: buffer material 50: support plate

60: mount 100: support plate

110: plate portion 120: wall portion

200: buffer 300: auxiliary buffer

310: hollow part 320: buffer protrusion

400: metal thin film layer

Claims (13)

In the buffer floor structure for the building floor, A support plate 100 formed below the finishing mortar layer 30 or the lightweight foam concrete layer 20 to support an upper load; A buffer member 200 formed at a lower portion of the support plate 100; It is formed under the buffer member 200, the lower portion is configured to be supported by the lightweight foam concrete layer 20 or concrete floor layer 10, a plurality of spaced apart from each other to have a hollow portion 310 inward Consists of, including; secondary buffer 300 composed of a buffer projection (320) A buffer layer structure for a building floor having a hollow part. The method of claim 1, Characterized in that the metal thin film layer 400 is formed below the auxiliary buffer 300, A buffer layer structure for a building floor having a hollow part. The method of claim 1, The support plate 100, Characterized in that formed from 1 to 3 of polypropylene, polyvinyl chloride, polyethylene as a raw material, A buffer layer structure for a building floor having a hollow part. The method of claim 1, The support plate 100, Characterized in that any one selected from plywood, a wood powder press-molded plate added with a binder, an inorganic powder press-molded plate added with a binder, a wood powder and a binder is added, and a press-formed press molded by mixing the inorganic powder, A buffer layer structure for a building floor having a hollow part. The method of claim 1, The support plate 100 is characterized in that any one of a single layer structure or a multi-layer structure, A buffer layer structure for a building floor having a hollow part. The method of claim 1, The buffer member 200, Characterized in that the foam molded from one or two selected from natural rubber or synthetic rubber as a raw material, A buffer layer structure for a building floor having a hollow part. The method of claim 1, The buffer member 200, It is characterized in that the foamed molding using 1 to 6 selected from polyurethane, polyolefin, polyethylene, polypropylene, polyvinyl chloride, ethylene vinyl acetate as a raw material, A buffer layer structure for a building floor having a hollow part. The method of claim 1, The buffer member 200, Characterized in that formed of a polyester nonwoven layer, A buffer layer structure for a building floor having a hollow part. The method of claim 1, The buffer member 200, Characterized in that 1 to 8 kinds of foamed grinding materials selected from natural rubber, synthetic rubber, polyurethane, polyolefin, polyethylene, polypropylene, polyvinyl chloride, and ethylene vinyl acetate are mixed and molded. A buffer layer structure for a building floor having a hollow part. The method of claim 1, The auxiliary buffer 300 is, Characterized in that the foam molded from one or two selected from natural rubber or synthetic rubber as a raw material, A buffer layer structure for a building floor having a hollow part. The method of claim 1, The auxiliary buffer 300 is, It is characterized in that the foam molded from 1 to 6 selected from polyurethane, polyolefin, polyethylene, polypropylene, polyvinyl chloride, ethylene vinyl acetate as a raw material, A buffer layer structure for a building floor having a hollow part. The method of claim 1, The auxiliary buffer 300 is, Characterized in that formed of a polyester nonwoven layer, A buffer layer structure for a building floor having a hollow part. The method of claim 1, The buffer member 200, Characterized in that 1 to 8 kinds of foamed grinding materials selected from natural rubber, synthetic rubber, polyurethane, polyolefin, polyethylene, polypropylene, polyvinyl chloride, and ethylene vinyl acetate are mixed and molded. A buffer layer structure for a building floor having a hollow part.

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