JP4389098B2 - Floor anti-vibration mechanism with concrete damping mass - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration isolating mechanism for a floor capable of isolating the floor of a building for dwelling units / housing.
[0002]
[Prior art]
In recent dwelling units / houses (hereinafter referred to as dwelling units), instead of the traditional wooden construction, the construction of the living space by assembling standard panels or lightweight steel frames, etc., 2x4 construction method, prefabricated construction method, reinforced concrete construction method, etc. Is increasing.
These modern buildings often use lightweight, high-rigidity materials, which makes it easy to propagate vibrations, or if the floor surface is wide to obtain a large living space. Vibrations caused by daily life (hereinafter referred to as floor vibrations) sometimes became a problem. As means for preventing the floor vibration, a method of increasing the rigidity of beam members such as a large beam and a small beam constituting the floor, and a method of increasing the rigidity of the floor panel while reducing the weight of the floor panel as much as possible are adopted.
However, the method of increasing the rigidity of a beam material or the like has a cost increase and restrictions on the use surface (space). Further, in the method of increasing the rigidity of the floor board by reducing the weight of the floor board as much as possible, the vibration damping of the floor is not lowered as expected.
[0003]
As an anti-vibration mechanism for floors that solves the above problems, one described in JP-A-11-2286 has been developed. FIG. 4 is a cross-sectional view of a conventional floor vibration isolation mechanism, and FIG. 5 is a perspective view of the floor structure partially cut, showing a state where the floor vibration isolation mechanism is attached. In the figure, reference numeral 1 denotes a floor vibration isolating mechanism, 2 denotes a cylindrical case, and the cylindrical case 2 has a flange portion 2A fixed to the bottom thereof. Reference numeral 3 denotes a bottom plate. The bottom plate 3 is liquid-tightly fixed to the flange portion 2A of the cylindrical case 2 by screws 4. Reference numeral 5 denotes a disc-shaped cushion rubber whose outer peripheral portion is vulcanized and bonded to the inner side surface of the cylindrical case 2, and whose inner peripheral side is vulcanized and bonded to a metal stud 6. The stud 6 is connected in a liquid-tight manner. The protrusion provided at the upper end of the stud 6 is threaded to fasten the stud to the floor structure. A damping plate 7 is attached to the 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 enclosed with a highly viscous damping oil 8. A donut-shaped damping mass 9 is loaded on the flange portion 2 </ b> A of the cylindrical case 2, and is fixed together with the bottom plate 3 by screws 4.
The damping mass 9 of the vibration isolating mechanism for floors has a weight of several kg to several tens kg depending on the size and rigidity of the corresponding floor structure.
[0004]
The floor structure in the dwelling unit is generally configured by connecting two large beams 10 extending in the longitudinal direction by a plurality of small beams 11 extending in the transverse direction, and a joist 12 is formed on the upper surface of the small beams 11. The floor board 13 is placed.
The conventional floor vibration isolating mechanism described above has a structure in which the floor vibration isolating mechanism 1 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. To do.
The floor vibration isolation mechanism as described above is usually installed in a space such as under the floor during construction of a dwelling unit and used for a long period of time.
[0005]
[Problems to be solved by the invention]
However, in the underfloor space, moisture may easily accumulate depending on the use and structure of the building. In conventional anti-vibration mechanisms for floors, steel materials are normally used for the damping mass. When used underneath, rusting tends to occur, so rust prevention treatment is indispensable.
Furthermore, the steel damping mass for the floor vibration isolation mechanism is adjusted to an appropriate weight by molding or cutting, but requires large-scale manufacturing equipment such as mold equipment and machining. There were problems such as very high costs.
Accordingly, an object of the present invention is to provide a vibration isolating mechanism for a floor which has a good appearance state and can be manufactured at low cost even when used for a long period of time.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an invention according to claim 1 is a floor vibration isolation mechanism that is attached to a floor structure of a building for a dwelling unit and that prevents vibration caused by the life of a resident. A stud that receives vibration directly from the case, a case that contains high-viscosity damping oil, and the stud that is liquid-tightly fixed to the center, and a peripheral part that is fixed to the case directly or via a sleeve. In the anti-vibration mechanism for a floor, comprising a plate-like cushion rubber, a damping plate fixed to the lower end of the stud and positioned in the highly viscous damping oil, and a damping mass fixed to the case , the damping mass is formed by a concrete material and, sandwiched of the flange portion provided on the upper portion of the case, a mounting made destined than vertically downward steel plate , In which the upper mounting plate was to be fastened to the casing by bolts passing through the damping mass. In the invention according to claim 2, the upper end is fixed to the floor structure, the stud for fixing the damping plate to the lower end, the cup-shaped case containing the highly viscous damping oil, and the outer peripheral surface of the sleeve portion. A flanged sleeve to which a rubber seal member is vulcanized and bonded, and an outer peripheral portion is vulcanized and bonded to the inner peripheral surface of the flanged sleeve, and an inner peripheral side is vulcanized and bonded to the outer peripheral surface of the stud. On the other hand, a disc-shaped cushion rubber having a substantially lid shape, and the rubber seal member of the sleeve with flange is press-fitted into the opening of the cup-shaped case, so that the cup-shaped case, the cushion rubber and the stud are And flanged sleeves form and seal the fluid chamber and position the damping plate in the fluid chamber damping oil. A damping mechanism for a floor comprising a damping mechanism main body and a damping mass fixed to the cup-shaped case, wherein the damping mass is formed of a concrete material having a gap in the center, After placing the damping mechanism main body, apply a steel plate mounting plate from below vertically, sandwich the damping mass between the mounting plate, the flange portion of the sleeve with flange, and the flange portion of the case. The damping mechanism main body is fastened and fixed by a penetrating bolt . In addition to the configuration of the invention described in claim 1 or 2, the case described in claim 3 is formed on the inner peripheral surface of the case by forming the body part and the bottom part by press molding. A case damping plate is fixed to the stepped portion, and the case damping plate is located between the damping plate and the cushion rubber .
[0007]
Generally, a dynamic damper can be installed as a countermeasure against the resonance of a vibrating structure, but the dynamic damper exhibits its anti-vibration effect by tuning to a fixed resonance frequency due to its nature. It is not suitable for shock vibration having such a wide frequency range. On the other hand, the floor vibration-proof mechanism of the present invention configured as described above has a strong damping structure using damping oil, so that it is not necessary to adjust the resonance frequency and is suitable for impact vibration. work.
Further, in the case of floor vibration, generally, vibration of a so-called low-order mode floor structure of about 1 to 3 is often a problem. Therefore, the floor vibration isolation mechanism according to the present invention is a vibration analysis of the floor structure to be attached. It is more effective to perform (FEM, mode analysis, etc.) and attach it to the antinode position (large amplitude part) of the vibration mode in question.
[0008]
The floor vibration isolation mechanism according to the present invention can be a floor vibration isolation mechanism that is very inexpensive in terms of both manufacturing cost and material cost by molding a damping mass having a large weight composition ratio with an inexpensive concrete material. .
In particular, a method of producing instantly demolding concrete (immediate demolding method) in which hard-mixed concrete is put into a formwork, pressure vibration compaction is performed, and the formwork is immediately removed is suitable. This has the advantage that the cost required for the formwork can be saved, and the curing time is short, so that many cycles can be produced per day, and a low-cost damping mass can be obtained.
[0009]
In addition, because the damping mass that occupies most of the surface area on the exterior of the vibration isolator for the floor is molded with concrete material, rust does not occur even when installed in the underfloor space with a high humidity atmosphere. Even if it is used, it is difficult to cause appearance problems due to rust.
In addition, since the damping mass is formed of concrete material, the case can be embedded at the time of forming the damping mass, parts for fixing the damping mass to the case can be omitted, and the outer surface of the case is also rust-proofed. Can be omitted.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view showing a first embodiment of a floor vibration isolating mechanism according to the present invention. 2 is a cross-sectional view of the floor anti-vibration mechanism shown in FIG.
In the figure, reference numeral 14 denotes a floor vibration isolation mechanism, and the floor vibration isolation mechanism 14 includes a damping mass 15 made of a concrete material formed in a rectangular shape and a damping mechanism main body 16.
The damping mechanism body 16 is a liquid-filled damping mechanism and has the following configuration. Reference numeral 17 denotes a cup-shaped case having a stepped barrel formed by press-molding a stainless steel plate. The cup-shaped case 17 has a case damping 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 generally lid shape. A rubber seal member 22 is vulcanized and bonded to the outer peripheral surface of the flanged sleeve 20.
The stud 21 engages and fixes the damping plate 23 at the lower end portion, and the upper end portion includes two screw holes 24 for fixing the floor vibration isolating mechanism 14 to the floor structure. The flanged sleeve 20 is press-fitted into the opening of the cup-shaped case 17 and the flange-shaped sleeve 20 including the cup-shaped case 17 and the cushion rubber 19 having the substantially lid shape, the stud 21 and the rubber seal member 22 is used as a liquid. A chamber 25 is formed, and at the same time, the damping plate 23 is positioned in the liquid chamber 25 and hermetically sealed together with a highly viscous damping oil 26.
[0011]
The damping mass 15 is formed of a concrete material having a gap at the center, and after placing the damping mechanism main body 16 in the gap, a mounting plate 27 made of a stainless steel plate is applied from below vertically in FIG. The damping mass 15 is sandwiched between the mounting plate 27, the flange portion of the flanged sleeve 20, and the flange portion of the case 17, and fastened and fixed by a stainless steel bolt 28.
[0012]
In the above embodiment, the damping mass 15 is sandwiched by the mounting plate 27 from below in the vertical direction. This is because the damping mass 15, which is a heavy object, is separated from the damping mechanism body 16. This is because the fixing to 11 is easy.
The procedure is as follows. First, the damping mechanism main body 16 is connected to the beam 11 using the two screw holes 24, then the damping mass 15 is applied from below, and the damping mechanism main body is placed in the gap of the damping mass 15. 16 and is clamped and fastened with the mounting plate 27.
However, since the present invention is not limited to the above-described attachment process, it is of course possible to employ another attachment process to fix the damping mass 15 from above or to be fastened as a single unit. is there.
[0013]
Further, in the above embodiment, by using two screw holes 24 for fastening to the small beam 11, it is possible to prevent the floor anti-vibration mechanism body from gradually rotating due to long-term floor vibration and preventing the screws from loosening. However, the fixing method is not limited to the above.
Moreover, in the said Example, although stainless steel metal fittings are used about metal fittings, it is not limited to stainless steel metal fittings. In the present invention, the damping mass that occupies most of the appearance is made of concrete, so the exposed metal surface is small, so use bolts and mounting plates that have been subjected to simple rust prevention treatment Can do.
In the above embodiment, since the damping mass 15 is separated 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 discarded. It is.
[0014]
FIG. 3 is a cross-sectional view showing a reference example of the floor vibration isolating mechanism according to the present invention. In the figure, reference numeral 29 denotes a floor vibration isolation mechanism. This floor vibration isolation mechanism 29 has a cup-shaped case 30 having a flange portion 30A that expands outward to the middle height of the trunk portion. Are installed by welding welding members 31 having screw holes at equal intervals in the circumferential direction of the flange portion. The case 30 is embedded and fixed simultaneously with the molding of the concrete damping mass 32, and the flange 30 </ b> A bites into and engages with the damping mass 32. Other configurations are the same as those of the first embodiment.
[0015]
In the present reference example , the flange 30A is engaged and fixed when the damping mass 32 and the damping mass 32 are formed, so there is no need to provide a separate fixing bracket. Further, since the metal part is embedded 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.
[0016]
The above-mentioned damping mass made of concrete material may be manufactured by natural drying molding using a normal formwork, but it does not require strength, so it can be used for quick-drying concrete, resin-filled concrete, metal, etc. It is possible to use concrete in which a weight adjusting material is embedded.
[0017]
【The invention's effect】
As described above in detail, according to the vibration isolating mechanism for floors according to the present invention , the damping mass is formed from a concrete material. Therefore, it is possible to form by simply assembling a simple formwork, mold equipment and large-scale machining. By forming a damping mass having a large weight composition ratio from a concrete material without the need for equipment, both a manufacturing cost and a material cost can be obtained as an inexpensive floor vibration isolation mechanism. In addition, if an immediate demolding method is employed for the production of a concrete-made damping mass, a large amount of damping mass can be produced at a low cost, and an inexpensive floor vibration isolation mechanism can be obtained. In addition, since the damping mass is formed of a concrete material, it is difficult to cause a problem of rust even when installed in an underfloor space having a high humidity atmosphere. Further , there is an effect that the rust prevention treatment can be omitted also on the outer periphery of the case.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of a vibration isolating mechanism for floors according to the present invention.
FIG. 2 is a cross-sectional view of the floor vibration isolating mechanism shown in FIG.
FIG. 3 is a cross-sectional view showing a reference example of the floor vibration isolating mechanism according to the present invention.
FIG. 4 is a cross-sectional view of a conventional vibration isolating mechanism for floors.
FIG. 5 is a partially cut perspective view of a floor structure showing a mounting state of the floor vibration isolation mechanism.

Claims (3)

It is a floor vibration isolation mechanism that is attached to the floor structure of a building for dwelling units and that prevents vibrations caused by the lives of residents,
Stud that receives vibration directly from the floor structure, a case containing highly viscous damping oil, and the stud is liquid-tightly fixed at the center, and the peripheral edge is liquid-tightly fixed to the case directly or via a sleeve a rubber cushion substantially plate-shaped that, the damping plate which is positioned in the damping oil in the high viscous secured to the lower end of the stud, the floor vibration damping mechanism comprising a damping mass to stick to the case,
The damping mass is formed of a concrete material, and
It is clamped by the flange part provided in the upper part of the said case, and the mounting plate made from the steel plate applied from the perpendicular downward direction, and the said mounting plate is fastened and fixed to the said case with the volt | bolt which penetrates the said damping mass. Anti-vibration mechanism for floor. A stud with an upper end fixed to the floor structure, a stud that fixes a damping plate at the lower end, a cup-shaped case containing highly viscous damping oil, and a flange with a rubber seal member vulcanized and bonded to the outer peripheral surface of the sleeve The sleeve and the outer peripheral portion are vulcanized and bonded to the inner peripheral surface of the flanged sleeve, and the inner peripheral side is vulcanized and bonded to the outer peripheral surface of the stud, so that the cup-shaped case has a substantially lid shape. With a disk-shaped cushion rubber
The rubber seal member of the flanged sleeve is press-fitted into the opening of the cup-shaped case, and a liquid chamber is formed and sealed by the cup-shaped case, the cushion rubber, the stud, and the flanged sleeve, and the damping plate is sealed. A damping mechanism body positioned in the damping oil of the chamber;
A floor vibration isolating mechanism comprising a damping mass fixed to the cup-shaped case,
The damping mass is formed of a concrete material having a gap in the center, and after placing the damping mechanism main body in the gap, a steel plate mounting plate is applied from below in the vertical direction. A vibration isolating mechanism for a floor, wherein a damping mass is sandwiched between a flange portion of a sleeve and a flange portion of a case, and is fastened and fixed to the damping mechanism main body by a bolt penetrating the damping mass.     The case has a body part and a bottom part formed by press molding, and a case attenuation plate is fixed to a stepped portion provided on the inner peripheral surface of the body part. The case attenuation plate includes the damping plate, a cushion, The floor vibration isolation mechanism according to claim 1 or 2, wherein the vibration isolation mechanism is located between the rubbers.

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