JP2002227394A - Vibration control mechanism for floor equipped with damping mass made of concrete material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control mechanism for a floor having an excellent appearance even under long-term use and manufacturable at a low cost. SOLUTION: This vibration control mechanism 14 for the floor is mounted to the floor structure of a building for dwelling units to control vibration generated by the life of an inhabitant. The vibration control mechanism 14 comprises a stud 21 directly receiving the vibration from the floor structure or the like; a case 17 containing damping oil 26 of high viscosity; cushion rubber 19 of almost plate shape whose peripheral edge part is stuck in a liquid-tight manner to the case 17 directly or through a sleeve 20 while sticking the stud 21 in a liquid-tight manner to the center part; a damping plate 23 stuck to the other end of the stud 21 and positioned in the damping oil 26 of high viscosity; and a damping mass 15 stuck to the case 17 directly or through a fitting 20. The damping mass 15 is formed of a concrete material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor vibration isolating mechanism capable of damping floors of dwelling units and houses.

[0002]

2. Description of the Related Art Recent dwelling units and houses (hereinafter referred to as dwelling units).
In recent years, 2D4 construction, prefabricated construction, reinforced concrete construction, etc., in which a living space is constructed by assembling standard panels or lightweight steel frames, instead of traditional wooden construction, are increasing. In these modern buildings, lightweight and high-rigid materials are often used, which makes the structure easy to transmit vibration, and if the floor is widened to obtain a large living space, Vibration caused by life (hereinafter referred to as floor vibration) has sometimes become a problem. As a means to dampen this floor vibration,
A method of increasing the rigidity of beam members such as large beams and small beams constituting the floor, and a method of increasing the rigidity of the floor plate while minimizing the weight of the floor plate are adopted. However, the method of increasing the rigidity of a beam member or the like has a limitation in cost increase and a use surface (space). In addition, in the method of increasing the rigidity of the floorboard by reducing the weight of the floorboard as much as possible, the vibration attenuation of the floor does not decrease as expected.

As a floor vibration isolating mechanism that solves the above-mentioned problems, one described in Japanese Patent Application Laid-Open No. H11-2286 has been developed. FIG. 4 is a cross-sectional view of a conventional floor vibration isolator.
FIG. 5 is a perspective view showing a mounted state of the vibration isolating mechanism for a floor, in which the floor structure is partially cut. In the figure, 1 is a floor vibration isolating mechanism, 2 is a cylindrical case, and the cylindrical case 2 has a flange 2A fixed to the bottom. 3
Is a bottom plate, and the bottom plate 3 is fixed to the flange portion 2A of the cylindrical case 2 by screws 4 in a liquid-tight manner. Reference numeral 5 denotes a disk-shaped cushion rubber whose outer peripheral portion is vulcanized and bonded to the inner surface of the cylindrical case 2, and whose inner peripheral side is vulcanized and bonded to a metal stud 6. Stud 6
Are connected in a liquid-tight manner. A thread provided on the protrusion provided at the upper end of the stud 6 is cut, and the stud is fastened to the floor structure. A damping plate 7 is attached to a lower end of the stud 6 by caulking. The damping plate 7 is positioned in a liquid chamber formed by the cylindrical case 2, the cushion rubber 5, the stud 6, and the bottom plate 3, and is sealed together with a high-viscosity damping oil 8. Then, a donut-shaped damping mass 9 is loaded on the flange portion 2A of the cylindrical case 2,
The bottom plate 3 is fixed together with the screw 4. The damping mass 9 of the floor vibration isolating mechanism weighs several kg to several tens kg depending on the size and rigidity of the corresponding floor structure.

The floor structure of a dwelling unit is generally formed by connecting two large beams 10 extending in the longitudinal direction with a plurality of small beams 11 extending in the lateral direction. A joist 12 and a floor plate 13 are placed on the floor. The above-described conventional vibration damping mechanism for a floor has the following structure.
Is fastened and fixed to the lower part of the small beam 11 to attenuate the vibration of the floor structure transmitted to the small beam. The floor vibration isolating mechanism as described above is usually installed in a space such as under the floor when building a dwelling unit and used for a long time.

[0005]

However, in the underfloor space, moisture may easily accumulate depending on the use and structure of the building. In a conventional vibration isolator for floors, steel materials are usually used for the damping mass. Therefore, when used under high humidity as described above, rust is likely to occur, so rust prevention treatment is indispensable. Further, the steel damping mass of the floor vibration isolating mechanism is manufactured by adjusting to an appropriate weight by molding or cutting, but large-scale manufacturing equipment such as a molding equipment and machining is required, and the manufacturing is performed. There was a problem that the cost was extremely high. Accordingly, an object of the present invention is to provide a floor vibration isolating mechanism which has a good appearance and can be manufactured at low cost even when used for a long time.

[0006]

In order to achieve the above object, an invention according to claim 1 is provided on a floor structure of a building for a dwelling unit or the like, and is used for a floor for damping vibration caused by a resident's life. A stud that directly receives vibration from the floor structure, a case containing high-viscosity damping oil, and the stud is liquid-tightly fixed at the center, and the periphery is directly attached to the case or sleeve. A disk-shaped cushion rubber that is fixed in a liquid-tight manner through a pad, a damping plate that is fixed to the other end of the stud and positioned in the high-viscosity damping oil, and is fixed to the case directly or through a metal fitting. In the vibration damping mechanism for a floor including a damping mass, the damping mass is made of a concrete material. According to a second aspect of the present invention, in addition to the configuration of the first aspect, the case is buried in the damping mass.

In general, as a countermeasure against resonance of a vibration structure,
The installation of a dynamic damper is conceivable, but due to its nature, the dynamic damper exhibits a vibration damping effect by tuning to a fixed resonance frequency.
It is not suitable for impact vibration having a wide frequency range such as floor vibration. On the other hand, the floor vibration isolation mechanism of the present invention configured as described above has a strong damping structure using damping oil, so that adjustment of the resonance frequency is unnecessary, and it is suitable for impact vibration. work. In addition, in the case of floor vibration, generally, vibration of a floor structure in a so-called low order mode of about first to third order often causes a problem. (FEM, mode analysis, etc.), and it is more effective to attach it to the antinode position (large amplitude part) of the vibration mode in question.

The floor vibration damping mechanism according to the present invention is a floor vibration damping mechanism that is very inexpensive in both manufacturing cost and material cost by forming a damping mass having a large weight composition ratio from an inexpensive concrete material. be able to. In particular, a method of immediately releasing the concrete by putting the hardened concrete into the formwork, compacting it with pressure and vibration, and immediately removing the formwork (immediate demolding method) is suitable. This has the advantage that the cost required for the mold can be saved, and the curing time is short, so that many cycles can be manufactured per day, and a low-cost damping mass can be obtained.

Further, since the damping mass occupying most of the external surface area of the vibration isolating mechanism for the floor is formed of concrete, no rust is generated even when the damping mass is installed in a space under the floor having a high humidity atmosphere. Even if used for a long time, the appearance problem due to rust hardly occurs. In addition, since the damping mass is formed from a concrete material, the case can be buried when the damping mass is formed, and the parts for fixing the damping mass to the case can be omitted. Can be omitted.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view showing a first embodiment of a floor vibration isolating mechanism according to the present invention. FIG. 2 is a sectional view of the floor vibration isolating mechanism shown in FIG. In the figure, reference numeral 14 denotes a floor vibration isolating mechanism.
Consists of a damping mass 15 made of a concrete material formed into a rectangular parallelepiped and a damping mechanism main body 16. The damping mechanism main body 16 is a liquid-filled damping mechanism, and has the following configuration. Reference numeral 17 denotes a cup-shaped case having a stepped body formed by press-molding a stainless steel plate. The cup-shaped case 17 has a case attenuation plate 18 fitted and fixed to the stepped portion. Reference numeral 19 denotes a disk-shaped cushion rubber. The outer peripheral portion of the cushion rubber 19 is vulcanized and bonded to the inner peripheral surface of the flanged sleeve 20, and the inner peripheral side of the cushion rubber 19 is vulcanized and bonded to a metal stud 21. It has a substantially lid shape. The outer peripheral surface of the sleeve 20 with a flange is
2 is vulcanized. The stud 21 has two screw holes 24 for fixing the damping plate 23 to the floor structure at the lower end, while fixing the damping plate 23 to the floor structure at the upper end. The flanged sleeve 20 is press-fitted into the opening of the cup-shaped case 17, and the liquid is formed by the flanged sleeve 20 provided with the cup-shaped case 17, the cushion rubber 19, the stud 21, and the rubber seal member 22 having the substantially lid shape. Forming a chamber 25,
At the same time, the damping plate 23 is positioned in the liquid chamber 25 and is sealed with a high-viscosity damping oil 26.

The damping mass 15 is formed of a concrete material having a gap at the center, and the damping mechanism body 16 is arranged in the gap, and a mounting plate 27 made of a stainless steel plate is disposed vertically below in FIG. The damping mass 15 is sandwiched between the mounting plate 27 and the flange portion of the flanged sleeve 20 and the flange portion of the case 17 and fastened and fixed by stainless steel bolts 28.

In the above-described embodiment, the damping mass 15 is sandwiched by the mounting plate 27 from below vertically. This is because the damping mass 15 which is a heavy material is separated from the damping mechanism main body 16. This is because fixing to the small beam 11 is easy. The procedure is as follows. First, the damping mechanism body 16 is connected to the small beam 11 using two screw holes 24, and then the damping mass 15 is applied from below, and the damping mechanism body is placed in the gap of the damping mass 15. 16, and are clamped and fastened by the mounting plate 27. However, since the present invention is not limited to the above-described mounting process, a different mounting process may be adopted to fix the damping mass 15 from above, or of course, may be fastened together. is there.

Further, in the above-described embodiment, by providing two screw holes 24 for fastening to the small beam 11, it is possible to prevent the floor vibration isolating mechanism main body from gradually rotating due to long-term floor vibration and loosening the screws. Although it is prevented, the fixing method is not limited to the above. Further, in the above embodiment, the metal fittings are made of stainless steel metal fittings, but are not limited to the stainless steel metal fittings. In the present invention, since the damping mass occupying most of the appearance is made of concrete, the appearance of the metal surface is small, so that a bolt or a mounting plate subjected to a simple rust-proof treatment is used. Can be. Further, in the above embodiment, since the damping mass 15 is separate from the damping mechanism main body 16, if the damping mass does not include a material other than the concrete material, it can be easily disassembled and disposed at the time of disposal. It is.

FIG. 3 shows a second embodiment of the floor vibration isolating mechanism according to the present invention.
It is sectional drawing which shows an Example. In the figure, reference numeral 29 denotes a floor vibration isolating mechanism. The floor vibration isolating mechanism 29 has a cup-shaped case 30 having a flange portion 30A whose diameter is increased outward at a body intermediate height. Is provided with a welding member 31 having screw holes at equal intervals in the circumferential direction of the flange portion. The case 30 is buried and fixed at the same time as the concrete damping mass 32 is molded, and the flange 30A bites into the damping mass 32 and is engaged therewith. Other configurations are the same as those of the first embodiment.

In the present embodiment, since the flange 30A is engaged and fixed when the damping mass 32 is formed, there is no need to separately provide a fixing bracket. Further, since the metal part is buried in the damping mass 32, there are few parts that come into contact with the outside air, so that the problem of rust hardly occurs.

The above-mentioned concrete damping mass may be produced by natural drying molding using a normal mold, but it does not require strength, and therefore, it does not require quick drying concrete, resin-filled concrete or resin-filled concrete. Concrete in which a weight adjusting material such as metal is embedded can be used.

[0017]

As described above in detail, according to the floor vibration isolating mechanism of the present invention, since the damping mass is formed from the concrete material, it can be formed only by assembling a simple mold. By molding a damping mass having a large weight composition ratio from a concrete material without the need for a mold facility or a large-sized machining facility, it is possible to provide an inexpensive floor vibration isolating mechanism in terms of both manufacturing cost and material cost. In addition, regarding the production of a damping mass made of concrete material, if an immediate demolding method is adopted, a large amount of damping mass can be produced at low cost, and a more inexpensive floor vibration isolating mechanism can be obtained. In addition, since the damping mass is formed of a concrete material, the problem of rust is unlikely to occur even when the damping mass is installed in a space under the floor having a high humidity atmosphere. In addition, since the damping mass is formed of a concrete material, the case of the damping mechanism body can be buried when the damping mass is formed, and the parts and steps for fixing the damping mass to the case can be omitted, and the case can be omitted. There is an effect that the rust prevention treatment can be omitted also on the outer periphery.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a floor vibration isolation mechanism according to the present invention.

FIG. 2 is a cross-sectional view of the floor anti-vibration mechanism shown in FIG.

FIG. 3 is a cross-sectional view illustrating a second embodiment of the floor vibration isolator according to the present invention.

FIG. 4 is a cross-sectional view of a conventional floor vibration isolation mechanism.

FIG. 5 is a partially cutaway perspective view of the floor structure showing a mounting state of the floor vibration isolation mechanism.

[Explanation of symbols]

 1, 14, 29: Floor vibration-isolating mechanism 2: Cylindrical case 2A: Flange part 3: Bottom plate 4: Screw 5, 19, Cushion rubber 6, 21, ...・ Studs 7,23 ・ ・ ・ Damping plate 8,26 ・ ・ ・ Damping oil 9,15,32 ・ ・ ・ Damping mass 10 ・ ・ ・ Large beam 11 ・ ・ ・ Small beam 12 ・ ・ ・ Joint 13 ・ ・ ・ Floor plate 16 ... Attenuation mechanism body 17, 30 ... Cup-shaped case 18 ... Case attenuation plate 20 ... Sleeve with flange 22 ... Rubber seal member 24 ... Screw hole 25 ... Liquid chamber 27 ...・ Placement plate 28 ・ ・ ・ Bolt 30A ・ ・ ・ Flange 31 ・ ・ ・ Mounting member

Claims (2)

[Claims] A stud mounted on a floor structure or the like of a building for dwelling units and configured to dampen vibrations caused by the living of a resident, wherein the stud directly receives vibration from the floor structure and the like. And a substantially plate-shaped cushion rubber in which the stud is fixed in a liquid-tight manner at the center and the periphery is fixed in a liquid-tight manner directly or via a sleeve, and the other end of the stud. A damping plate fixed to the high-viscosity damping oil and fixed to the case, and a damping mass fixed to the case directly or via a metal fitting, wherein the damping mass is made of concrete material. A floor vibration isolating mechanism. 2. The vibration damping mechanism for floors according to claim 1, wherein the case is buried in the damping mass.