WO2007061199A1

WO2007061199A1 - Supporting system for double floors

Info

Publication number: WO2007061199A1
Application number: PCT/KR2006/004860
Authority: WO
Inventors: Chul-Hwan Kim; Sung-Ha Park; Hun-Sung Kang; Mun-Sung Bae; Chung-Hwa Lee; Ho-Yeon Chang
Original assignee: Lg Chem, Ltd.
Priority date: 2005-11-25
Filing date: 2006-11-17
Publication date: 2007-05-31
Also published as: KR20070055095A

Abstract

Disclosed herein is a supporting system for double floors, which is capable of enhancing the effect of reducing heavy impact noise. The supporting system includes a supporting plate for supporting an upper plate. A hollow damping bushing is mounted to the supporting plate. A nut is secured to the damping bushing. A supporting bolt is fastened to the nut through a screw-type fastening method. Further, a supporting rubber is coupled to one end of the supporting bolt. The damping bushing is secured to the supporting plate through an adhesion method or a screw-type fastening method. The damping bushing is secured to the nut through an adhesion method or a screw-type fastening method.

Description

SUPPORTING SYSTEM FOR DOUBLE FLOORS

Technical Field

[1] The present invention relates, in general, to a supporting system for double floors and, more particularly, to a supporting system for double floors, which is capable of enhancing the effect of reducing heavy impact noise.

[2]

Background Art

[3] Recently, as residence types have changed to multiple-unit buildings, such as apartments or multiplex houses, and the scale of such buildings increases, the demands on the indoor environment of the apartment building are becoming more stringent. Thus, floor impact noise in an apartment building constitutes a social problem. Therefore, urgent measures to reduce floor impact noise are required.

[4] Generally, floor impact noise is sound which is emitted in the air by the vibration of a floor slab generated when impacts, caused by a person walking, objects dropping, children running, or furniture moving, act on a floor.

[5] In order to reduce the floor impact noise of the apartment building, a double floor system is generally used when the house is constructed. The double floor system is constructed so that a double floor is mounted on a slab, and an upper plate is mounted on the double floor, thus more efficiently preventing impact energy acting on the upper plate from being directly transmitted to the structure (the slab and walls).

[6] According to the regulations governing housing-construction standards (partially revised on April. 22, 2004), the floors in an apartment building must be constructed so that light impact noise (floor impact noise generated by relatively light and hard impacts) between layers is 58 decibels or less, and heavy impact noise (floor impact noise generated by relatively heavy and soft impacts) is 50 decibels or less. A standard floor structure and a floor-impact-noise isolation performance level, which satisfy the floor-impact-noise standards, have been determined and made known.

[7] The example of a conventional double floor system adapted to mitigate floor impact noise will be described below.

[8] Typically, the double floor system includes an upper plate and a supporting system for supporting the upper plate. The supporting system includes a supporting plate for supporting the upper plate, a nut provided on the supporting plate, a supporting bolt fastened to the nut through a screw-type fastening method, and a supporting rubber mounted on the bottom of the supporting bolt.

[9] In the double floor constructed as described above, the supporting plate may be made of metal, plasties, inorganic matter, wood, etc. Preferably, the supporting plate uses planks of wood into which nails can be driven, thus facilitating integration the supporting plate with the upper plate into a single structure.

[10] Further, the nut provided on the supporting plate and the supporting bolt fastened to the nut through a screw-type fastening method are made of a steel material to ensure rigidity. The supporting rubber comprises vibration-proof rubber having vibration damping capacity, which is made by adding an additive, for example, carbon or iron oxide, to rubber having elasticity and vibration damping capacity, so as to absorb impact force transmitted to the floor and reduce the transmission of vibrations.

[11] The double floor constructed as described above enables adjustment of the height of the supporting plate and the upper plate by adjusting the extent to which the supporting bolt is coupled to the nut. The floor impact noise is absorbed and reduced by the supporting rubber.

[12] As such, conventionally, the floor impact noise is absorbed and reduced only by the supporting rubber, so that the effect of decreasing the floor impact noise, especially heavy impact noise, is slight.

[13] Thus, the development of a supporting system for double floors, which is capable of more efficiently decreasing heavy impact noise, is required.

[14]

Disclosure of Invention

Technical Problem

[15] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a supporting system for double floors, which is capable of more efficiently decreasing heavy impact noise.

[16]

Technical Solution

[17] In order to accomplish the object, the present invention provides a supporting system for double floors, which includes a supporting plate for supporting an upper plate, a hollow damping bushing mounted to the supporting plate, a nut secured to the damping bushing, a supporting bolt fastened to the nut through a screw-type fastening method, and a supporting rubber coupled to one end of the supporting bolt.

[18] The damping bushing may comprise vibration-proof rubber having vibration damping capacity, which is made by adding an additive, for example, carbon or iron oxide, to rubber having elasticity and vibration damping capacity.

[19] Such a damping bushing is mounted to the supporting plate through an adhesive or a screw-type fastening method, and is also secured to the nut through an adhesive and/ or a screw-type fastening method. [20] As such, the damping bushing to which the nut is fastened serves to absorb or reduce heavy impact noise. [21]

Brief Description of the Drawings

[22] FlG. 1 is a view illustrating the schematic construction of a supporting system for double floors, according to an embodiment of the present invention, in a sectional view and an enlarged view; and

[23] FlG. 2 is a sectional view showing the construction of important parts of a supporting system for double floors, according to another embodiment of the present invention.

[24]

Mode for the Invention

[25] Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[26] FlG. 1 is a sectional view illustrating the schematic construction of a supporting system for double floors, according to an embodiment of the present invention.

[27] The supporting system for double floors, according to the embodiment of this invention, includes a supporting plate 10 for supporting an upper plate 100, and a supporting bolt 30 fastened to the supporting plate 10 and a supporting rubber 20.

[28] One end of the supporting bolt 30 is secured to a nut 40 mounted to the supporting plate 10, through a screw-type fastening method. A bolt head 32, provided on the other end of the supporting bolt 30, is detachably and rotatably coupled to a head mounting part (not shown) which is provided in the supporting rubber 20.

[29] Preferably, the bolt head 32 has the shape of a flat circle, thus allowing the load acting on the supporting bolt 30 to be easily and evenly distributed to the supporting rubber 20.

[30] The supporting bolt 30 is the part that serves to adjust the height of the supporting plate 10. The density of the threads of the supporting bolt 30 and the material of the supporting bolt 30 are important. When the threads are denser, precise height adjustment is possible, but the assembly speed is slow and the defect rate of the threads is high. Thus, it is preferable to use a bolt having a specified standard.

[31] For example, the supporting bolt 30 may use a bolt complying with a KS B 1002 standard, which has a diameter from 5 to 20mm and a length from 20 to 200mm.

[32] The supporting rubber 20 serves to mount the upper plate to a position spaced apart from the concrete slab by a predetermined interval, and has a hemispherical shape, as shown in the drawing. [33] The head mounting part (not shown), to which the head 32 of the supporting bolt 30 is detachably mounted, is provided on the upper surface of the supporting rubber 20.

[34] In this case, the head mounting part may comprise three or more head locking pieces which protrude to the center of the upper surface of the supporting rubber 20.

[35] At this time, an inlet formed by the head locking pieces has a size similar to the diameter of the supporting bolt 30. Thus, when the bolt head 32 is inserted into the head mounting part using the elasticity of the head locking pieces, the bolt head 32 is locked to the narrowed inlet, so that the bolt head 32 is not undesirably removed from the bolt mounting part.

[36] Further, as described above, the bottom of the supporting rubber 20 may have a round structure having a hemispherical shape. Such a structure minimizes the area through which impact noise is transmitted to the floor.

[37] The supporting rubber 20 may further include an adhesive injecting hole which vertically passes through the upper surface and the lower surface of the supporting rubber 20.

[38] The supporting rubber 20, constructed as described above, may be formed using a mold after an additive, for example, carbon or iron oxide, is added to a rubber having elasticity and vibration damping capacity. Preferably, the supporting rubber 20 may be made of vibration-proof rubber having vibration damping capacity so as to absorb impact force transmitted to the floor and reduce the transmission of vibrations.

[39] Further, at least one hollow part may be horizontally formed in the supporting rubber 20 to enhance the cushioning effect.

[40] The supporting plate 10 is the part which serves to stably support the upper plate

100 of the double floor. A hole is formed in the center of the supporting plate 10, a damping bushing 50 is inserted into the hole, and the nut 40 is inserted into the damping bushing 50.

[41] The damping bushing 50 serves to absorb or decrease floor impact noise, especially heavy impact noise, and may be formed using a mold after an additive, for example, carbon or iron oxide, is added to rubber having elasticity and vibration damping capacity. Preferably, the damping bushing 50 may be made of vibration-proof rubber having vibration damping capacity, thus absorbing impact force transmitted to the floor and decreasing the transmission of vibrations.

[42] As shown in the enlarged view of FIG. 1, an internal threaded part is formed on the damping bushing 50 to engage the nut 40.

[43] In this case, the damping bushing 50 is attached to the supporting plate 10 using an adhesive 52. The damping bushing 50 may be secured to the supporting plate 10 using an external threaded part (see reference numeral 54 of FIG. 2). Although not shown in the drawings, the damping bushing 50 may be press-fitted into the supporting plate 10. [44] As such, the assembly of the damping bushing 50 with the supporting plate 10 or the assembly of the damping bushing 50 with the nut 40 may be realized through one of a screw-type fastening method, an adhesion method, or a press-fitting method.

[45] Further, adhesive tape (not shown) is attached to the upper surface of the supporting plate 10 so that the upper plate 100 is attached to the supporting plate 10.

[46] The supporting plate 10 may be made of metal, plastic, inorganic material, or wood.

Preferably, the supporting plate 10 uses planks of wood into which nails can be driven, thus facilitating integration of the supporting plate 10 with the upper plate 100 into a single structure.

[47] Further, an adhesive storage cavity 12 is provided in the upper surface of the supporting plate 10 at a position where the nut 40 is inserted, and stores an adhesive applied thereto.

[48] Meanwhile, a rotating tool fitting part (not shown), that is, a plus- or minus-shaped groove, is formed on the end of the supporting bolt 30 that is adjacent to the nut. Thus, it is possible to adjust the height of the supporting plate 10 by rotating the supporting bolt 30 using a rotating tool, for example, a screwdriver.

[49] Further, one or more key holes (not shown) may be formed from the end of the supporting bolt 30 which is adjacent to the nut 40 to a predetermined position, for example, formed throughout the length of the supporting bolt 30. The key holes serve as a passage for supplying the adhesive, stored in the adhesive storage cavity 12 of the supporting plate 10, to the adhesive injecting hole (not shown) of the supporting rubber 20. The number and the depth of the key holes are determined in consideration of the fluidity of the adhesive to be used.

[50] The adhesive selectively uses epoxy, vinyl, or a water-soluble adhesive, which has high fluidity and thus flows easily, and is cured within a period ranging from 1 hour to 24 hours. Alternatively, an additionally developed adhesive may be used as the adhesive of the present invention.

[51] The operation of constructing the double floor using the supporting system for double floors constructed as described above will be described below.

[52] First, the bolt head 32 of the supporting bolt 30 is coupled to the supporting rubber

20, and one end of the supporting bolt 30 is coupled to the nut 40 of the supporting plate 10.

[53] In such a state, one edge of the upper plate 100 is attached to the supporting plate

10 at a predetermined position. The upper plate 100 and the supporting system are disposed above the slab 110.

[54] Thereafter, by rotating the supporting bolt 30 using the rotating tool, the operation of leveling the upper plate 100 is executed. When the operation has been completed, the adhesive is applied to the adhesive storage cavity 12 of the supporting plate 10, so that the supporting bolt 30 is attached to the nut 40, the supporting bolt 30 is attached to the supporting rubber 20, and the supporting rubber 20 is attached to the slab 110.

[55] Of course, the nut 40 may be attached to the damping bushing 50 using the adhesive.

[56] Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

[57]

Industrial Applicability

[58] As described above, the present invention provides a supporting system for double floors, in which a nut fastened to a supporting bolt through a screw-type fastening method is secured to a damping bushing mounted to a supporting plate, thus primarily decreasing floor impact noise, especially heavy impact noise, using the damping bushing, and secondarily decreasing the floor impact noise using a supporting rubber.

[59] Therefore, the heavy impact noise can be more efficiently decreased.

[60]

Claims

[1] A supporting system for double floors, comprising: a supporting plate for supporting an upper plate; a hollow damping bushing mounted to the supporting plate; a nut secured to the damping bushing; a supporting bolt fastened to the nut through a screw-type fastening method; and a supporting rubber coupled to one end of the supporting bolt. [2] The supporting system according to claim 1, wherein the damping bushing is secured to the supporting plate through one of an adhesion method, a screw-type fastening method, and a press-fitting method. [3] The supporting system according to claim 1, wherein the damping bushing is secured to the nut through one of an adhesion method, a screw-type fastening method, and a press-fitting method. [4] The supporting system according to any one of claims 1 to 3, wherein the damping bushing comprises vibration-proof rubber, having vibration damping capacity, or elastic rubber. [5] The supporting system according to any one of claims 1 to 3, wherein a lower surface of the supporting rubber has a round structure having a hemispherical shape. [6] The supporting system according to any one of claims 1 to 3, wherein the supporting rubber comprises vibration-proof rubber, having vibration damping capacity, or elastic rubber. [7] The supporting system according to any one of claims 1 to 3, wherein an adhesive storage cavity is provided in the supporting plate and stores an adhesive applied thereto.