JP3015737B2 - Floor structure and anti-vibration rubber means for floor structure used therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor structure for elastically supporting a steel frame of a floor panel on a structural body such as a beam, a column or a floor, and a vibration isolating rubber means for the floor structure used therefor.

[0002]

2. Description of the Related Art In general, a relatively light floor structure such as a wooden house or an industrialized house is inferior in the performance of blocking heavy impact noise. For this reason, when a child jumps on the floor panel on the second floor or descends from the step platform, a loud impact sound is generated, and this impact sound is propagated downstairs, causing a problem that the downstairs residents are extremely annoyed. ing. Further, in such a wooden house or the like, a wooden flooring or a wooden floor panel frame is provided with a floor base and a floor finish. Recently, steel floor panels have been used instead of wooden floors.

[0003]

However, since a steel material is less attenuating the impact sound than wood, the propagation of the heavy impact sound downstairs is large, and it is necessary to block the propagation. Generally, a heavy impact sound generated when a child jumps on a floor panel on the second floor or descends from a platform is transmitted as noise from the floor panel through the air on the first floor (primary propagation sound). And noise transmitted through the air on the first floor from the floor panel through the frame structure, the side wall, etc. (secondary propagation sound). Therefore, in order to reduce the secondary propagation sound as well as the primary propagation sound, the damping of the floor panel frame, the beam material or the wall material is improved, and the weight impact sound in the 50 to 90 Hz band which is the lowest audible region of the weight impact sound is improved. Various attempts have been made to improve the breaking performance of
In fact, no attempt has been made to obtain a sufficient blocking performance.

[0004] Regarding the insulation performance of heavy impact noise on the upper floor, from June 1993 in the industrialized house performance certification, and from the financing standard of the Japan Housing Finance Agency in 1988.
L-65 or less has been the criterion since May. However, in a lightweight floor structure using a steel frame for a floor panel of an industrialized house or the like, a resonance point is provided at about 50 Hz, and the sound insulation performance at about 50 Hz against heavy impact is poor.
-65 was difficult to achieve.

Further, when the floor panel is supported on the structural body via a vibration-proof rubber or the like and the dynamic spring constant of the floor structure is reduced, the floor surface vibrates during the walking, and a feeling of wobbly walking becomes a problem. ing.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to provide a floor structure excellent in a performance of blocking a heavy impact sound and a vibration-proof rubber means for the floor structure used therefor.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a floor panel in which a rectangular panel is attached to at least the upper surface of a rectangular steel frame, and the floor panel is occupied in a horizontal position. The floor structure in which the steel frame of the floor panel located at a higher position in the space is supported by a structural body via a vibration-proof rubber means whose dynamic spring constant is set to 80 kgf / mm or less at 50 Hz. The steel frame of the floor panel, the structural frame,
It consists of anti-vibration rubber means disposed between the steel frame and the structural skeleton and elastically supporting the steel frame, and the anti-vibration rubber means,
A liquid chamber in which a liquid is filled and a contact surface side with the steel frame or the structural body is formed on an open surface, a rubber elastic body forming a constituent wall of the liquid chamber, and a vicinity of an open surface of the liquid chamber A second aspect is a floor structure comprising an orifice-provided partition plate disposed in the liquid chamber and partitioning the liquid chamber up and down, and an elastic thin film disposed on an open surface of the liquid chamber and closing the liquid chamber in a liquid-tight manner. ,
Anti-vibration rubber means disposed between the steel frame of the floor panel and the structural frame and elastically supporting the steel frame, wherein a liquid is filled therein and a contact surface side with the steel frame or the structural frame is open. A liquid chamber formed on a surface of the liquid chamber, a rubber elastic body forming a constituent wall of the liquid chamber, a partition plate with an orifice disposed near an open surface of the liquid chamber and vertically dividing the liquid chamber; A third aspect of the invention is a vibration isolating rubber means for a floor structure, which is provided on an open surface of the above and is formed of an elastic thin film which closes a liquid chamber in a liquid-tight manner.

That is, in the floor structure of the present invention, since the dynamic spring constant of the vibration isolating rubber means is set to 80 kgf / mm or less at 50 Hz, the impact on the upper floor (such as jumping, dropping from the platform, etc.) is obtained. , Which has a maximum component around 50 Hz) can be effectively absorbed, the effect of suppressing noise generation is great, and sound insulation near 50 Hz, which is a problem in the sound insulation performance of lightweight floor structures such as industrialized houses, etc. The performance can be improved. On the other hand, the vibration isolating rubber means for a floor structure of the present invention has a liquid chamber filled with a liquid, and a contact surface side with the steel frame or the structure body is formed on an open surface, and a constituent wall of the liquid chamber is formed. A rubber elastic body, a partition plate with an orifice disposed near the open surface of the liquid chamber and partitioning the liquid chamber up and down, and an elastic member disposed on the open surface of the liquid chamber and closing the liquid chamber in a liquid-tight manner. It is composed of a thin film. For this reason, when the rubber elastic body is deformed by vibration on the floor panel, the pressure in the liquid chamber changes, and the liquid moves up and down inside the orifice, and vibration is damped by the inertial force of the liquid moving inside the orifice. Power is gained. Therefore, the vibration-proof rubber means having the above-mentioned dynamic spring constant set at 80 kgf / mm or less at 50 Hz can be easily manufactured. The floor structure of the present invention can be easily realized by using such a vibration-proof rubber means. On the other hand, the shock when walking is 25 Hz
In the present invention, the dynamic spring constant of the vibration isolating rubber means is 170 kgf / mm or more at 25 Hz and the loss factor is 0.28 or more at 25 Hz. Can be kept within a certain range, and the vibration can be converged at an early stage, so that the walking feeling is not affected.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a floor structure according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a steel rectangular floor panel frame (a U-shaped steel angle) on which a second-floor rectangular floor panel 26 (see FIGS. 2 and 3) is attached on its upper surface. Made of a rectangular frame).
Reference numeral 2 denotes a lower structure (structural skeleton) such as a steel beam material, and the floor panel frame 1 is provided with four liquid-enclosed vibration-proof rubber means 3 in the lower structure 2 (a place surrounded by a circle in FIG. 2). Used elastically. In FIG. 2, reference numeral 27 denotes a U-shaped fixing member attached to a corner portion or a connection portion of each floor panel frame 1, which is bolted (not shown) to the floor panel frame 1 and the lower structure 2, respectively. . As shown in FIG. 4, the liquid-filled anti-vibration rubber means 3 has an upper lid 4 attached to an upper end of a lower rubber body 5. Then, when a load is applied to the liquid-enclosed anti-vibration rubber means 3 by, for example, a child jumping on the floor panel 26 on the second floor,
As shown in FIG. 5, the liquid 25 filled in the liquid chamber 24 of the liquid filled
Are orifices 15, 17 and orifice passage 18 (FIG. 12).
) And the liquid 2 generated by this traffic
The inertia force of 5 is used to obtain the damping force.

The upper lid 4 comprises a lid fitting 6 with bolts, a diaphragm 7 and a pair of partition plates 8 and 9. As shown in FIG. 6 and FIG.
The metal fitting body 6a is formed in a substantially disk-shaped downward thin dish-like body, and the mounting bolt 10 is inserted into a round hole formed in the center of the metal fitting body 6a with the screw portion 10a protruding upward. Are welded and fixed. This mounting bolt 10
It is screwed to the floor panel frame 1 with a nut 11. In the figure, reference numeral 6b denotes an outer wall hanging down from the outer peripheral portion of the metal fitting body 6a. The diaphragm 7 is, as shown in FIG.
Annular diaphragm fitting 12 (see FIGS. 9 and 10)
A rubber thin film 13 in the shape of a dish is vulcanized and formed on the lower surface of the thin film 13. An inverted truncated cone-shaped recess 13a formed at the center of the thin film 13 is formed so as to be able to be turned upside down. I have. The outer peripheral portion of such a diaphragm 7 is formed in a size that can fit inside the outer wall 6b of the metal fitting body 6a of the lid metal fitting 6.

As shown in FIGS. 11 and 12, the pair of partition plates 8 and 9 include an upper partition plate 8 and a lower partition plate 9. The upper partition plate 8 is shown in FIGS.
As shown in FIG. 3, a projection 14a for blocking a passage protrudes in a radial direction from one side of an inverted truncated cone-shaped recess 14 formed in the center thereof. A rectangular hole-shaped orifice 15 is formed in the lateral side of the protrusion 14a. Such an inverted truncated conical recess 14 is formed by the recess 13 a of the thin film 13 of the diaphragm 7.
It is slightly larger in diameter and slightly deeper. On the other hand, the lower partition plate 9 is formed in a circular dish shape as shown in FIGS. 16 and 17, and as shown in FIG.
A square hole-shaped orifice 17 is formed in the bottom wall 16a of the inverted truncated conical recess 16 formed at the center.
When the upper partition plate 8 is placed on the lower partition plate 9, the bottom wall 16 a of the recess 16 abuts against the bottom wall 14 b of the concave portion 14 of the upper partition plate 8, and the slope of the recess 16 is the upper partition plate. The plate 8 is formed in a shape that comes into contact with the tip slope 14c of the protruding portion 14a. In the state described above, the orifice 17 of the lower partition plate 9 is in contact with the recess 1 of the upper partition plate 8.
4, the orifice 15 of the upper partition plate 8 is located inside the recess 16 of the lower partition plate 9.

When such a pair of partition plates 8 and 9 are assembled, the orifice 17 of the lower partition plate 9 and the orifice 15 of the upper partition plate 8 are opposed to the projection 14a of the upper partition plate 8, respectively. After the two partition plates 8 and 9 are positioned in the state of being disposed on the side, the upper partition plate 8 is placed on the lower partition plate 9 and fixed by spot welding in that state. As a result, as shown in FIG. 19, a substantially C-shaped passage surrounded by the inner peripheral surface of the concave portion 16 of the lower partition plate 9, the concave portion 14 of the upper partition plate 8, and the outer peripheral surface of the protruding portion 14a (the above-mentioned protruding portion). An orifice passage 18 is formed as an orifice passage 18 interrupted by 14a. And
The orifice 17 of the lower partition plate 9 (opening in the vicinity of one side of the protrusion 14a) becomes the lower opening of the orifice passage 18, and the orifice 15 of the upper partition plate 8 (the other side of the protrusion 14a). (Opening in the vicinity) is the upper opening of the orifice passage 18.

The lower rubber body 5 has a circular dish-shaped upper metal member 19 (see FIGS. 20 and 21) having an outer wall 19a erected on the outer periphery and a round hole 19b formed in the center, and a substantially inverted cone. A lower metal fitting 20 with a trapezoidal bolt and a rubber body 2 made of natural rubber for integrally connecting the two metal fittings 19, 20 by vulcanization molding
It consists of 1. The rubber body 21 has an inverted truncated cone-shaped recess 21a formed on the upper surface thereof, which can abut on the recess 16 of the lower partition plate 9 in an external fitting manner, and a cylindrical recess on the lower surface of the recess 21a. 21b is formed. As shown in FIGS. 22 and 23, the lower metal fitting 20 with a bolt is provided with a round hole at the center of the bottom wall 20a. The mounting bolt 22 is welded and fixed in a protruding state. The mounting bolt 22 is screwed to the lower structure 2 with a nut 23.

When assembling the upper lid 4 integrally with the lower rubber body 5, the upper lid 4 is attached to the upper bracket 19 of the lower rubber body 5.
The outer wall 19a of the upper metal fitting 19 is bent inward and mounted and fixed in this state. As a result, the space surrounded by the lower surface of the lower partition plate 9 of the upper cover 4 and the inner peripheral surface of the rubber body 21 and the orifice passage 18 formed by the pair of upper and lower partition plates 8 and 9 form the liquid chamber 2.
The liquid chamber 24 is filled with a liquid (ethylene glycol 80% by weight + water 20% by weight) 25. In this case, the dynamic spring constant of the liquid-filled anti-vibration rubber means 3 is set to 50 to 80 kgf / mm at 50 Hz and to 170 to 200 kgf / mm at 25 Hz. The loss factor is 0.28 at 25 Hz.
It is set to 0.4. Such a dynamic spring constant and the like are set to predetermined values by appropriately adjusting the viscosity of the liquid 25, the hole diameters of the orifices 15 and 17, the length and the width of the orifice passage 18, and the like.

In the above configuration, when an impact occurs due to a child jumping on the floor panel 26 on the second floor, the impact is applied via the floor panel frame 1 to the liquid-filled anti-vibration rubber means 3.
Conveyed to. As a result, as shown in FIG. 3, the rubber body 21 of the liquid-enclosed vibration-proof rubber means 3 is compressed and deformed, and the liquid 25 filled in the liquid chamber 24 of the liquid-enclosed vibration-proof rubber means 3 is filled with the orifice of the upper partition plate 8. 15 flows into the upper part of the upper partition plate 8, and the diaphragm 7 expands and deforms. At the same time, the liquid 25 flows through the orifice 17 and the orifice passage 18 of the lower partition plate 9 also in the liquid chamber 24. Thereby, the above-mentioned impact is absorbed, and the buffer effect is exhibited.

As described above, in the above-described embodiment, the impact sound transmitted from the floor panel frame 1 to the lower structure 2 such as the beam member can be made extremely small, whereby the primary propagation sound and the secondary propagation sound can be reduced. Can be reduced to reduce noise. In this case, since the dynamic spring constant of the liquid-filled anti-vibration rubber means 3 is set to 50 to 80 kgf / mm at 50 Hz, the weight impact sound in the 50 Hz band can be extremely reduced. Moreover, the dynamic spring constant is set to 170 to 200 kgf / mm at 25 Hz, and the loss factor is 0.28 to 25 kg at 25 Hz.
Since it is set to 0.4, the displacement of the vibration of the floor panel 26 (having a maximum component near 25 Hz) due to normal walking is stopped within a certain range, and the vibration is quickly converged, which hinders the walking feeling. Do not give.

An experiment for measuring the floor impact sound level was conducted according to JIS A
Performed according to 1418-1978. The results are shown in Tables 1 and 2 below and FIG. In Tables 1 and 2, 1 to No. No. 8 shows the results in the case where a liquid-enclosed vibration-proof rubber means in which high-viscosity silicon was enclosed as a liquid was used. 9-No. Reference numeral 11 denotes a case in which the liquid-filled anti-vibration rubber means 3 of the above embodiment is used (Nos. 9 to N
o. 11, the length of the orifice passage 18 is gradually reduced in this order. Thus, the orifice passage 18
Is changed, the weight of the liquid in the orifice passage 18 changes, and the resonance frequency of the liquid resonance with the mass of the liquid in the orifice passage 18 as a mass changes. Constant and damping coefficient can be tuned in various ways).
o. Numeral 12 shows the result when no liquid-enclosed vibration-proof rubber means is used. In Table 1, the dynamic spring constant A indicates a dynamic spring constant of 50 Hz, the dynamic spring constant B indicates a dynamic spring constant of 25 Hz, and the loss factor is 25.
The loss factor in Hz is shown. In Table 2, the value of the sound insulation performance is a value obtained by converting an actual measurement value in the case of a ceiling, and the target value is 67 or less. Also, N
o. 9 and No. 9 12, the floor impact sound level (d
FIG. 24 shows the relationship between B) and the octave band center frequency (Hz). As is clear from the above experimental results, when the liquid-filled anti-vibration rubber means 3 of the above embodiment is used (from the experimental results of No. 9 to No. 11),
It can be seen that as the length of the orifice passage 18 becomes shorter, the dynamic spring constants A and B tend to increase, and the sound insulation performance and walking feeling tend to decrease. And N
o. 9 and No. 9 10, dynamic spring constant A is 80 kg
f / mm or less and excellent in sound insulation performance and walking feeling. In addition, No. In No. 11, although the dynamic spring constant A was 80 kgf / mm or more and the sound insulation performance was 67 or more, the loss factor was 0.28, and it was found that the walking feeling was good.

[0019]

[Table 1]

[0020]

[Table 2]

In the above embodiment, the liquid-filled anti-vibration rubber means 3 is attached to the lower structure 2 such as a beam.
The present invention is not limited to this, and may be directly attached to the pillar on the first floor. Further, in the above embodiment, the floor panel frame 1 on the second floor is elastically supported by the liquid-filled anti-vibration rubber means 3, but the floor panel frame 1 on the first floor may be elastically supported. In this case, the lower structure 2 becomes a floor support. In addition, the liquid-filled anti-vibration rubber means 3 is turned upside down (that is, the mounting bolt 10 of the bolted lid 6 is screwed to the lower structure 2, and the mounting bolt 22 of the bolted lower metal 20 is connected to the floor panel frame. 1
May be used).

In the above embodiment, the liquid chamber 24
Liquid 2 of 80% by weight of ethylene glycol + 20% by weight of water 2
5, but is not limited to this.
A liquid such as propylene glycol or antifreeze may be filled.

[0023]

As described above, according to the floor structure of the present invention, the dynamic spring constant of the vibration isolating rubber means is 80% at 50 Hz.
kgf / mm or less, 50Hz due to weight impact on the upper floor (due to jumping, dropping from the platform, etc.)
50 Hz, which is a problem in the sound insulation performance of a lightweight floor structure such as an industrialized house, which can effectively absorb a shock having a maximum component in the vicinity, and has a large noise suppression effect.
The sound insulation performance in the vicinity can be improved. On the other hand, the vibration isolating rubber means for a floor structure of the present invention has a liquid chamber filled with a liquid, and a contact surface side with the steel frame or the structure body is formed on an open surface, and a constituent wall of the liquid chamber is formed. A rubber elastic body, a partition plate with an orifice disposed near the open surface of the liquid chamber and partitioning the liquid chamber up and down, and an elastic member disposed on the open surface of the liquid chamber and closing the liquid chamber in a liquid-tight manner. It is composed of a thin film. For this reason, when the rubber elastic body is deformed by vibration on the floor panel, the pressure in the liquid chamber changes, and the liquid moves up and down inside the orifice, and vibration is damped by the inertial force of the liquid moving inside the orifice. Power is gained. Therefore, the vibration-proof rubber means having the above-mentioned dynamic spring constant set at 80 kgf / mm or less at 50 Hz can be easily manufactured.
The floor structure of the present invention can be easily realized by using such a vibration-proof rubber means. On the other hand, the impact at the time of walking has a maximum component around 25 Hz, but in the present invention, the dynamic spring constant of the anti-vibration rubber means is 170k at 25 Hz.
gf / mm or more and a loss factor of 0.2 at 25 Hz.
Since it is 28 or more, the displacement of the floor panel during walking can be kept within a certain range, the vibration can be converged at an early stage, and the walking feeling is not affected.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing an embodiment of a floor structure of the present invention.

FIG. 2 is a plan view showing an attached state of a floor panel.

FIG. 3 is a side view of a main part showing a mounting state of the floor panel.

FIG. 4 is an explanatory view of a liquid-filled vibration-proof rubber means.

FIG. 5 is a partial sectional view showing the operation of the floor structure.

FIG. 6 is a cross-sectional view of a lid with bolts.

FIG. 7 is a plan view of the lid with bolt.

FIG. 8 is a sectional view of a diaphragm.

FIG. 9 is a cross-sectional view of a diaphragm fitting.

FIG. 10 is a plan view of a diaphragm fitting.

FIG. 11 is a sectional view showing a state in which a pair of partition plates are assembled.

FIG. 12 is a bottom view showing a state where the pair of partition plates are assembled.

FIG. 13 is a sectional view of an upper partition plate.

FIG. 14 is a bottom view of the upper partition plate.

FIG. 15 is a perspective view of the upper partition plate as viewed from below.

FIG. 16 is a sectional view of a lower partition plate.

FIG. 17 is a bottom view of the lower partition plate.

FIG. 18 is a perspective view of the lower partition plate as viewed from below.

FIG. 19 is a perspective view of the assembled state of the pair of partition plates as viewed from below.

FIG. 20 is a cross-sectional view of the upper metal fitting.

FIG. 21 is a bottom view of the upper metal fitting.

FIG. 22 is a sectional view of a lower metal fitting.

FIG. 23 is a bottom view of the lower metal fitting.

FIG. 24 is a diagram showing the performance of blocking floor impact noise.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor panel frame 2 Lower structure 3 Liquid-filled anti-vibration rubber means 4 Upper lid body 5 Lower rubber body 6 Bolt lid 7 Diaphragm 8 Upper partition plate 9 Lower partition plate 20 Lower bolt with bolt 21 Rubber body 24 Liquid chamber 25 liquid

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masahiko Nagasawa 3600, Gezu, Kita-gaiyama, Komaki-shi, Aichi Prefecture Inside Tokai Rubber Industries Co., Ltd. Within Shonal Housing Industry Co., Ltd. (72) Minoru Kawata, 208 208 Nakagishimoto, Koto-cho, Aichi-gun, Shiga Prefecture Inside National Housing Industry Co., Ltd. (72) Miyao Nakamura 208, Nakagishimoto, Koto-cho, Aichi-gun, Shiga Prefecture National Housing Within Sangyo Co., Ltd. (56) References JP-A-2-66263 (JP, A) JP-A-2-232463 (JP, A) JP-A-4-78341 (JP, A) JP-A-1-64532 (JP) , U) Japanese Utility Model Hei 1-151549 (JP, U) Japanese Utility Model Utility Model 59-1523 (JP, U) Japanese Utility Model Utility Model 1-1118546 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB Name) E04B 5/43 E 04B 1/98 E04F 15/18 601

Claims (6)

(57) [Claims] 1. A floor panel is formed by attaching a rectangular surface material to at least the upper surface of a rectangular steel frame, and the steel frame of the floor panel positioned above a living space in a horizontal posture is provided. A floor structure, wherein the floor structure is supported by a structural skeleton via a vibration-proof rubber means having a dynamic spring constant set at 50 Hz to 80 kgf / mm or less. 2. A floor frame comprising a steel frame, a structural frame, and vibration-proof rubber means disposed between the steel frame and the structural frame for elastically supporting the steel frame. A liquid chamber in which a liquid is filled, and a contact surface side with the steel frame or the structural body is formed on an open surface; a rubber elastic body forming a constituent wall of the liquid chamber; and an open surface of the liquid chamber. A floor provided with an orifice disposed in the vicinity of the liquid chamber to partition the liquid chamber up and down, and an elastic thin film disposed on the open surface of the liquid chamber and closing the liquid chamber in a liquid-tight manner. Construction. 3. The dynamic spring constant of the vibration isolating rubber means is 25 Hz.
170kgf / mm or more and loss factor is 25H
3. The floor structure according to claim 1, wherein z is 0.28 or more. 4. An anti-vibration rubber means disposed between a steel frame of a floor panel and a structural frame and elastically supporting the steel frame,
A liquid chamber in which a liquid is filled and a contact surface side with the steel frame or the structural body is formed on an open surface, a rubber elastic body forming a constituent wall of the liquid chamber, and a vicinity of an open surface of the liquid chamber For a floor structure, comprising a partition plate provided with an orifice disposed in the liquid chamber and partitioning the liquid chamber up and down, and an elastic thin film disposed on an open surface of the liquid chamber and closing the liquid chamber in a liquid-tight manner. Anti-vibration rubber means. 5. A dynamic spring constant of 80 kgf / 50 Hz at 50 Hz.
The vibration isolating rubber means for floor structure according to claim 4, which is set to not more than mm. 6. A dynamic spring constant of 170 kgf at 25 Hz.
The vibration isolating rubber means for floor structure according to claim 5, wherein the loss factor is 0.28 or more at 25 Hz or more.