JP2001049781A - Floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remarkably reduce floor impact sound by mounting a mounting tool on a side surface of a floor joist with a floor material mounted on an upper part and suspending a weight on the mounting tool via a damper. SOLUTION: A metallic mounting tool 8c is formed by a triangular parallel plate, a suspension plate for mounting a nut 85c and a mounting plate to a floor joist 212c. The mounting plate of the mounting tool 8c is fixed with machine screws along the floor joist 212c, a shaft 52c is screwed into the nut 85c and a liquid damper 5c is mounted on the mounting tool 8c. The liquid damper 5c is formed by filling viscous liquid of silicone oil into a sealing container constituted of a metallic side wall, a lower plate and a rubber upper plate and a disc-shaped weight is mounted on an upper surface part. As a result, floor vibration is rapidly damped and is reduced, even if a person walks on a floor of an upper floor and an object drops.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor structure with reduced floor impact noise. In particular, it relates to a floor structure suitable for unit buildings and having reduced floor impact noise.

[0002]

2. Description of the Related Art In a unit building, a box-shaped building unit having a fixed size that can be transported and having finished inside and outside is manufactured in a factory in advance, and a plurality of the building units are installed on a construction site. It has been widely used in recent years because it has the characteristics of being a standardized building with a short on-site construction period and high dimensional accuracy.

There are various building units used for such unit buildings. For example, Japanese Patent Publication No. 59-5083
As described in Japanese Patent Application Publication No. 5 (1999) -2005, there is known a building unit including a rectangular floor panel and a wall panel erected on the periphery of the floor panel. In this floor panel, a plurality of floor joists are attached to floor beams provided in the periphery so as to extend substantially in parallel, and a floor material is mounted on the upper surfaces of the floor beams and the floor joists.

In Japanese Patent Publication No. 61-42061,
Four pillars erected at the four corners of a rectangular shape, a ceiling beam connecting the upper ends of the four pillars along a rectangular side, and a lower edge of the four pillars at a rectangular side A framework of a building unit consisting of floor beams connected along is described. Then, a ceiling edge is inserted over the opposing ceiling beam, a ceiling material is attached to the lower surface of the ceiling edge to form a ceiling, a small floor beam is inserted over the opposing floor beam, a floor joist is mounted thereon, and this floor is attached. Attach floor materials on the joists to form a floor, and at the place where walls are to be provided, install studs between ceiling beams and floor beams, and attach outer wall panels and inner wall panels to these studs to form building units as walls It is.

[0005] Conventionally, when walking on the floor on the upper floor or dropping an object on the floor, the floor vibrates, and the impact sound generated by the vibration reverberates on the lower floor, disturbing the people on the lower floor. become.
This problem is common to all buildings, not just the unit buildings. Conventionally, various floor structures have been known to prevent such floor impact sounds. For example, Patent No. 251
No. 8961 describes a structure for reducing the floor impact sound of a floor structure as described in JP-B-59-50835.

[0006] In this floor structure, a connecting member is extended across a substantially parallel floor joist, and a ceiling hanger is attached to the connecting member in parallel with the floor joist, and a field edge is attached to the ceiling hanger so as to cross. A floor structure in which a ceiling plate of a lower floor is hung on the edge of the floor, and a weight is attached to the ceiling hanger to reduce floor impact noise. Also, Japanese Patent Application No. Hei 11-1801
No. 67 describes a structure for reducing the floor impact sound of a floor structure as described in Japanese Patent Publication No. 61-42061. This floor structure is a floor structure in which a plurality of floor beams are installed in parallel with each other on an opposing floor beam, and a horizontal member is mounted over the substantially parallel floor beams and attached. In this case, a weight is suspended via a damper to reduce floor impact noise.

[0007]

However, the above-mentioned patent No. 2
In the floor structure of No. 518961, since a weight is attached to the ceiling suspender, the natural vibration of the weight is significantly different from the natural vibration of the floor material and the floor joist. The vibrations cancel each other to reduce the floor impact noise, but the floor impact noise of the floor structure is insufficiently reduced.

The floor structure of Japanese Patent Application No. 11-180167 is
Since the weight is suspended via the damper, the natural vibration of the weight is significantly different from the natural vibration of the floor material, the floor beam, and the floor beam, so that the floor impact sound is reduced as described above. Furthermore,
The floor impact noise causes the weight to vibrate through the floor material, the floor beam, the floor beam, and the damper, and the vibration of the weight causes the floor beam to vibrate through the damper. These two vibrations are significantly reduced by the elasticity and viscosity of the damper when passing through the damper in the middle. This difference in natural vibration and the action of the damper overlap, resulting in a floor structure with low floor impact sound.

As described above, the floor structure of Japanese Patent Application No. 11-180167 is an extremely preferable floor structure in which floor impact noise is reduced. Therefore, this floor structure is attached by extending a floor joist to a floor beam like the floor structure of Japanese Patent No. 2518961,
In this floor structure with floor materials attached on the floor joists,
Attempts to further reduce the floor impact sound of this floor structure by applying the floor structure of 1-180167 have been found to be not straightforward.

[0010] The reason for this is disclosed in Japanese Patent Application No. 11-18016.
The floor structure of No. 7 has a floor joist on the floor beam and the floor material is mounted on this floor joist, so there is a gap between the floor beam and floor material, A horizontal member can be bridged over the floor beam, but in the floor structure described in JP-B-59-50835 and the floor structure of Japanese Patent No. 2518961, a floor joist is spread over the floor beam, Since the floor material is directly mounted on the floor joist, the floor material hinders the cross strut from being laid over the floor joist or the like.

Accordingly, an object of the present invention is to greatly reduce floor impact noise even in a floor structure in which a floor joist is mounted across a floor beam and a floor material is mounted on the floor joist. It is to provide a floor structure that can be used.

[0012]

Means for Solving the Problems The present invention has been made to achieve the above object, and the invention according to claim 1 has a structure in which a plurality of floor joists are mounted across opposing floor beams. In a floor structure in which a floor material is mounted on the floor joist, a fitting is mounted on a side surface of the floor joist,
A weight is suspended from the attachment via a damper.

According to a second aspect of the present invention, there is provided a floor structure in which a plurality of floor joists are attached to an opposing floor beam so as to extend substantially in parallel, and a floor material is mounted on the floor joists.
A metal joist connecting material is attached to the side of the substantially parallel opposing floor joists so as not to protrude the upper surface from the upper surface of the floor joists, and a weight is attached to the metal joist connecting material via a damper. It is suspended.

According to a third aspect of the present invention, there is provided a floor structure in which a plurality of floor joists are attached to opposing floor beams so as to extend substantially in parallel, and a floor material is mounted on the floor joists.
A wooden joist tie between the substantially parallel opposing floor joists is attached to the wooden joist ties in a state where the upper surface does not protrude from the upper surface of the floor joists, and a mounting tool is attached to a side surface of the wooden joist ties. A weight is suspended from the attachment via a damper.

According to a fourth aspect of the present invention, there is provided the sealed container according to the first to third aspects, wherein the damper comprises a rubber upper plate, a metal side wall, and a metal lower plate. A sealed container having a shaft attached to the upper plate in a state penetrating the upper plate of the sealed container, a viscous liquid filled in the sealed container, and a small gap between the side wall of the sealed container and the sealed container. And a damping plate attached to an inner shaft. The viscous liquid in the invention according to claim 4 is a liquid having a high viscosity, and is preferably a silicone oil, a lubricating oil, a vegetable oil, or the like.

(Function) According to the first aspect of the present invention, a fixture is attached to the side of the floor joist, and a weight is suspended from the fixture via a damper. When the floor vibrates by walking or dropping an object on the floor, and as a result, the floor joist vibrates, the weight vibrates through a mounting tool or a damper attached to the side of the floor joist. The vibration of the weight causes the floor joists to vibrate in the opposite direction, that is, through the damper and the fixture. Both vibrations are greatly attenuated while passing through the damper.

Further, the floor joists and the weight are greatly different in both size and weight, and the weight is simply suspended, so that the natural vibration of the floor joists and the like and the natural vibration of the weight greatly differ. The vibrations of both cancel each other out. As described above, the floor impact sound is caused by the fact that the floor vibration is attenuated by the damper and the natural vibration of the floor joist and the weight is different.
This floor vibration is rapidly attenuated and reduced.

In addition, even in a floor structure in which a plurality of floor joists are attached to the floor beams, the mounting fixture is mounted on the side surfaces of the floor joists. Since the weight is attached to the fixture via the damper, this fixture, damper, and weight can be attached without protruding from the upper surface of the floor joist, and the fixture and the weight attach the floor material on the floor joist. It does not get in the way. In particular, when this floor structure is applied to a unit building in which a plurality of building units are assembled, the building unit can be manufactured quickly and with high dimensional accuracy in a place such as a factory where facilities are provided. By simply installing, a quiet unit building with reduced floor impact noise.

According to the second aspect of the present invention, a metal joist connecting member is inserted across the side surfaces of the substantially parallel floor joists, and a weight is suspended from the metal joist connecting member via a damper. Therefore, when a person walks on the floor on the upper floor or drops an object on the floor, the floor vibrates, and as a result, the floor joist vibrates. The weight vibrates through the joists and dampers. or,
The vibration of the weight causes the floor joists and the like to vibrate in the opposite direction, that is, through dampers and metal joist connecting members. Both vibrations are greatly attenuated while passing through the damper.

Further, the floor joists and the weight are greatly different in both size and weight, and since the weight is merely suspended, the natural vibration of the floor joists and the natural vibration of the weight greatly differ. , Both vibrations cancel each other out. As described above, the floor vibration is attenuated by the damper, and the natural vibration of the floor joist and the weight is different from that of the floor, so that the floor vibration is rapidly attenuated and reduced.

Further, even in a floor structure in which a plurality of floor joists are mounted so as to extend substantially parallel to the opposing floor beams, and a floor material is mounted on the floor joists.
In the described invention, the metal joist connecting material on the side of the floor joist,
Since the upper surface is mounted so as not to protrude from the upper surface of the floor joist, and the weight is suspended via a damper to this metal joist connecting material, this metal joist connecting material does not protrude from above the floor joist, The damper or weight attached to the metal joist can be attached without protruding from the upper surface of the floor joist, and the metal joist connecting material does not interfere with the mounting of the floor material on the floor joist. .

According to the third aspect of the present invention, a wooden joist connecting member is inserted and attached between substantially parallel opposing floor joists, and a fixture is attached to a side surface of the joist connecting member. Since the weight is suspended via the damper, the floor vibrates when a person walks on the upper floor or drops an object on the floor, and as a result, the floor joists vibrate. The weight oscillates through the wooden joist ties, fittings, and dampers that are spread over the floor joists. In addition, the vibration of the weight causes the floor joists and the like to vibrate in the opposite direction, that is, through the damper, the fixture, and the wooden joist connecting member. Both vibrations are greatly attenuated while passing through the damper.

Further, the floor joists and the weight are greatly different in size and weight, and the weight is simply suspended, so that the natural vibration of the floor joists and the weight and the natural vibration of the weight are large. Differently, their vibrations cancel each other out. Thus, the floor vibration is damped by the damper,
Due to the fact that the natural vibration of the floor joist and the like differs from that of the weight, this floor vibration is rapidly attenuated and reduced.

Further, even in a floor structure in which a plurality of floor joists are attached to the opposing floor beams so as to extend substantially in parallel, and a floor material is mounted on the floor joists.
In the described invention, a wooden joist connecting member is provided on the side of the floor joist, in a state where the upper surface does not protrude from the upper surface of the floor joist, and a mounting tool is attached to the side surface of the wooden joist connecting material. Since the weight is suspended via the damper, this wooden joist connecting member does not protrude above the floor joist, and the mounting fixture, damper, and weight can be attached without protruding from the upper surface of the floor joist. The joist connecting material does not interfere with the installation of the floor material on the floor joist.

According to the fourth aspect of the present invention, the damper has a sealed container including a rubber upper plate, a metal side wall, and a metal lower plate, and the upper plate is provided so as to pass through the upper plate of the sealed container. A liquid seal comprising a shaft attached to the container, a viscous liquid filled in the sealed container, and a damping plate attached to the shaft in the sealed container with a small gap between the side wall of the sealed container. Since it is a damper, the shaft that projects above the upper plate of the sealed container of the damper is attached to a metal joist connecting member, a fixture, a wooden joist connecting material, etc., and a weight is attached to the side wall or lower plate of the sealed container, The vibration transmitted from the floor joist to the shaft through the metal joist connecting material, the mounting fixture, the wooden joist connecting material, etc. is due to the elasticity of the rubber attached to the shaft and the damping plate due to the vibration of the damping plate attached to the shaft. sealing By a small gap to the reciprocating movement of the viscous liquid viscosity between side walls of the vessel, it is greatly attenuated, thereby vibrating the weight arrived in weight.

The vibration of the weight is transmitted to the floor joist through a damper or the like, and the vibration of the weight is also transmitted through the damper in the same manner as described above. It is greatly attenuated and transmitted to the floor joists. That is,
Both vibrations are greatly damped while passing through the damper.

[0027]

Next, embodiments of the present invention will be described with reference to examples. (Embodiment 1) FIGS. 1 to 8 show an embodiment of the present invention. FIG. 1 is a perspective view showing a unit building, FIG. 2 is a partially cutaway perspective view showing a building unit on the first floor, and FIG. 4 is a partially cutaway perspective view showing the building unit on the second floor, FIG. 4 is a partially cutaway plan view of the floor panel of FIG. 3, FIG. 5 is a cross-sectional view taken along line AA of FIG. 4, and FIG. 7 is a partially cutaway plan view of the liquid ring damper, and FIG. 8 is a cross-sectional view taken along line BB of FIG. 1 to 8, U is a unit building. As shown in FIG. 1, the unit building U has nine building units 1 installed on a foundation 9 to form a first floor. Nine building units 2 are installed on the building unit 1 on the floor to form the second floor.
A plurality of roof units 3 (borders of roof units are omitted) are mounted on building units 2 on the floor.

As shown in FIG. 2, the building unit 1 on the first floor has a wall panel 12 erected on a peripheral edge of a floor panel 11. The floor panel 11 on the first floor is approximately 140 m long
m, a wooden floor beam 111 having a width of approximately 38 mm is assembled into a rectangular shape, and the opposite floor beam 111 has a length of approximately 140 m.
m, four wooden floor joists 112 having a width of approximately 38 mm are attached in parallel with each other, and the floor beams 111 and the floor joists 11 are attached.
A wooden joist connecting member 7 having a length of approximately 140 mm and a width of approximately 38 mm is interposed between the two, and a floor board 113 of a particle board having a thickness of approximately 20 mm is mounted thereon.

The wall panel 12 on the first floor is approximately 89 m long.
m, a wooden frame member 121 having a width of approximately 38 mm is assembled in a rectangular shape, and a wooden bar 122 having a length of approximately 89 mm and a width of approximately 38 mm is attached to the upper and lower frame members 121, and is attached to one or both surfaces. A wall material 123 such as an inner wall material of a gypsum board having a thickness of about 12 mm or an outer wall material of a hard wood chip cement board is attached.

In the building unit 2 on the second floor, as shown in FIG. 3, a wall panel 22 is erected on the periphery of a floor panel 21.
The ceiling panel 23 of the first floor is attached below the floor panel 21. The floor panel 21 on the second floor has a height of approximately 235.
mm, a wooden floor beam 211 having a width of approximately 38 mm is assembled into a rectangular shape, and the opposite floor beam 211 has a length of approximately 235 m.
m, four wooden floor joists 212 having a width of approximately 38 mm are attached in parallel with each other, and the floor beams 121 and the floor joists 12 are mounted.
A wooden joist connecting member 7 having a length of approximately 184 mm and a width of approximately 38 mm is mounted between the two, and a floor board 123 of a particle board having a thickness of approximately 20 mm is mounted thereon.

Further, as shown in FIGS. 4 and 5, a metal joist connecting member 4 is provided on the side surfaces of the substantially parallel floor beams 211 and the floor joists 212 of the floor panel 21 on the second floor, as shown in FIGS.
A weight 6 is attached to the metal joist connecting member 4 via a liquid seal damper 5 so as not to come out from the upper surface of the metal joist.

As shown in FIG. 6, the metal joist connecting member 4 has metal mounting plates 42 attached to both sides of a main body 41 of a square metal cylinder. A nut 43 is attached to a substantially central lower surface of the main body 41. Also, mounting plate 4
2 has a large number of through holes 421. The joist connecting member 4 is made of a substantially parallel opposing floor beam 211 or a floor joist 21.
2 and the through holes 421 of the mounting plates 42 on both sides.
Through the screw which is screwed into the floor joist 212, it is inserted and attached to the side surface of the opposing floor joist 212.

The second-floor wall panel 22 is approximately 89 m long.
m, a wooden frame member 221 having a width of approximately 38 mm is assembled in a rectangular shape, and a wooden bar 222 having a length of approximately 89 mm and a width of approximately 38 mm is attached to the upper and lower frame members 221, and is attached to one or both surfaces. A wall material 223 such as an inner wall material of a gypsum board having a thickness of about 12 mm or an outer wall material of a hard wood chip cement board is attached.

The ceiling panel 23 on the first floor is approximately 89 m long.
m, a wooden frame 231 having a width of about 38 mm is assembled in a rectangular shape, a wooden crosspiece having a length of about 89 mm and a width of about 38 mm is attached to the facing frame 231, and a gypsum board having a thickness of about 12 mm on the lower surface The ceiling material 233 is attached.

Numeral 5 is a liquid ring damper. The liquid ring damper 5 has a rubber upper plate 5 as shown in FIGS.
11, a sealed container 51 including a metal side wall 512 and a metal lower plate 513, a shaft 52 attached to the upper plate 511 so as to pass through the upper plate 511 of the sealed container 51,
A gap 59 between the viscous liquid 53 of silicone oil filled in the sealed container 51 and the side wall 512 of the sealed container 51.
And a damping plate 54 attached to the shaft 52 of the sealed container 51 in a reduced state. In addition, shaft 5
A male screw 521 is bored at the upper end of 2.

The weight 6 is composed of a disk 62 having a through hole 61 through which a shaft 52 can pass at a central portion, and a weight portion 63 integrally provided on the outer peripheral surface of the disk 62. Is approximately 15 kg. The weight 6 is mounted on the side wall 512 with a screw 69 while being placed on the side wall 512.

As shown in FIG. 5, the metal joist connecting member 4 is bridged between the opposing floor joists 212, 212 and the floor beam 211, and provided on the lower surface at the center of the metal joist connecting member 4. A male screw 521 is screwed into the nut 43 at the end of the shaft 52 of the liquid ring damper 5, and the liquid ring damper 5 and the weight 6 are attached to the metal joist connecting member 4. In this way, the liquid ring damper 5 and the weight 6
Is attached. The description of the roof panel 3 is omitted because it is almost the same as the conventional one.

Next, the construction method and operation of the unit building U will be described. In a factory, a building unit 1 on the first floor, a building unit 2 on the second floor, and a roof unit 3 are manufactured in the factory. The first-floor building unit 1, the second-floor building unit 2, and the roof unit 3 are transported to the construction site.

At the construction site, the foundation 9
, Nine building units 1 are installed to form a first floor, and nine building units 2 are installed on the first floor building unit 1 to form a second floor. The unit building U is completed when the roof panel 3 is attached on the floor 2, the floor finishing material is laid, and various finishings are performed.

The unit building U completed in this way
Then, the metal joist connecting member 4 does not protrude from the upper surface of the floor joist 212 on the substantially parallel opposing floor joist 212 or the side surface of the floor beam 211 of the floor panel 21 of the building unit 2 on the second floor. The weight 6 is suspended from the metal joist connecting member 4 via the liquid ring damper 5 so that a person can walk on the second floor or place an object on the floor. When the floor is vibrated by dropping or the like, as a result, when the floor joist 212 vibrates, the weight 6 vibrates through the metal joist connecting member 4 and the liquid ring damper 5 extended over the floor joist 212.
The vibration of the weight 6 is in the opposite direction, that is, the liquid ring damper 5
And the floor joists 212 and the like are vibrated through the joist connecting member 4 made of metal. Both vibrations are greatly attenuated while passing through the liquid ring damper 5.

That is, the liquid ring damper 5 includes a sealed container 51 composed of a rubber upper plate 511, a metal side wall 512, and a metal lower plate 513, and an upper plate 51 of the sealed container 51.
Shaft 52 attached to upper plate 511 in a state where
And a viscous liquid 53 filled in a sealed container 51;
It comprises a damping plate 54 attached to a shaft 52 in the sealed container 51 with the clearance 59 between the side wall 512 of the sealed container 51 reduced.

The sealed container 5 of the liquid ring damper 5
When the shaft 52 protruding above the upper plate 511 is attached to the metal joist connecting member 4, the side wall 51 of the sealed container 51
2, the vibration transmitted from the floor joist 212 to the shaft 52 through the metal joist connecting member 4 is:
The elasticity of the rubber attached to the shaft 52 and the viscous liquid 53 reciprocating in a small gap 59 between the damping plate 54 and the side wall 512 of the sealed container 51 due to the vibration of the damping plate 54 attached to the shaft 522. The weight 6 is greatly attenuated by the viscosity and causes the weight 6 to vibrate.
The vibration of the weight 6 is transmitted to the floor joist 212 in the opposite direction, that is, through the liquid ring damper 5, but the vibration traveling in both directions is greatly attenuated while passing through the liquid ring damper 5. .

Thus, both vibrations are greatly attenuated while passing through the liquid ring damper 5. In addition, weight 6
Is approximately 15 kg, which is heavy and is simply suspended, so that the natural vibration of the floor joist 212 and the like and the natural vibration of the weight greatly differ, and the vibrations of both of them cancel each other. As described above, the floor vibration is attenuated by the liquid ring damper 5, and the natural vibration of the floor joist 212 and the like differs from the natural vibration of the weight 6, so that the floor vibration is rapidly attenuated and reduced.

Further, the metal joist connecting member 4 is attached to the side surface of the floor joist 212 such that the upper surface does not protrude from the upper surface of the floor joist 212, and is connected to the metal joist connecting member 4 via the liquid sealing damper 5. Since the weight is suspended,
The metal joist connecting member 4 does not protrude from the floor joist 212, and the liquid ring damper 5 and the weight 6 attached to the metal joist connecting member 4 can be attached without protruding from the upper surface of the floor joist 212. The metal joist connecting member 4 and the like do not hinder the mounting of the floor member 213 on the floor joist 212.

The weight is dropped on the floor of the building unit 2 on the second floor of the unit building U to generate a heavy impact sound,
JI measuring sound intensity in the room of building unit 1 on the first floor
When measured by the measurement method specified in S, the sound pressure level at a frequency of 125 Hz was reduced by about 6.5 dB as compared with a case where a weight having the same weight was simply attached without the liquid ring damper. Further, in this unit building U, since the weight 6 is suspended from the floor beam 25 of the building unit 2 on the second floor via the liquid ring damper 5, the building unit 2 on the second floor is used for equipment such as a factory. It can be manufactured quickly and with high dimensional accuracy in a well-arranged place. By simply installing this building unit 2, a quiet building with less floor impact noise can be obtained.

(Embodiment 2) FIG. 9 shows another embodiment of the present invention, and is a plan view showing the relationship between a floor beam or a floor joist and a liquid ring damper or a weight.

Comparing the second embodiment shown in FIG. 9 with the first embodiment shown in FIGS. 1 to 8, the position and number (six) of the liquid ring dampers 5a and the weight 6a attached to the liquid ring dampers 5a are different. The difference is that the weight is 10 kg, and four 10 kg weights 65a are directly attached to the metal joist connecting member 4a separately from the liquid ring damper 5a. Other structures and construction methods are almost the same as those in the first embodiment, and thus description thereof is omitted.

Building unit 2 on the second floor of this unit building
Drop the weight on the floor of a and generate a heavy impact sound,
JI measuring sound intensity in the room of building unit 1 on the first floor
When measured by the measurement method specified in S, the sound pressure level at a frequency of 125 Hz is reduced by about 5 dB as compared with a case where a weight having the same weight is simply attached to the metal connecting member 4a without a liquid ring damper. did.

(Embodiment 3) FIG. 10 shows another embodiment of the present invention and is a plan view showing the relationship between a floor beam or a floor joist and a liquid ring damper or a weight.

When the third embodiment shown in FIG. 10 is compared with the first embodiment shown in FIGS. 1 to 8, the position and number (six) of the liquid ring dampers 5b and 25 kg separately from the liquid ring dampers 5a are different.
Is different in that the weight 65b is directly attached to the metal joist connecting member 4b. The weight 6b attached to the liquid ring damper 5b is 15 kg, which is almost the same as in the first embodiment. Other structures and construction methods are almost the same as those in the first embodiment, and thus description thereof is omitted.

The building unit 2 on the second floor of this unit building
Drop the weight on the floor of b to generate a heavy impact sound,
JI measuring sound intensity in the room of building unit 1 on the first floor
When measured by the measurement method specified in S, the sound pressure level at a frequency of 125 Hz is almost 6 dB lower than when a weight having the same weight is simply attached to the metal root connecting member 4b without the liquid ring damper. did.

Embodiment 4 FIGS. 11 to 13 show still another embodiment of the present invention. FIG. 11 is a partially cutaway plan view of a floor panel of a building unit on the second floor, and FIG. C-
FIG. 13 is a cross-sectional view taken along the line C, and FIG.

Comparing the fourth embodiment shown in FIGS. 11 to 13 with the first embodiment shown in FIGS. 1 to 8, the mounting fixture 8c is attached to the floor joist 212c, and the liquid sealing damper 5c is attached to the mounting fixture 8c. The weight 6c is suspended through the intermediary, the number of the mounting fixture 8c and the liquid ring damper 5c is eight, and the wooden floor beam 211c is approximately 286 mm long and 38 mm wide.
Is different. Accordingly, a description will be given of the attachment 8c and a structure in which the weight 6c is attached to the attachment 8c via the liquid seal damper 5c.

As shown in FIG. 13, the mounting fixture 8c is composed of two substantially parallel triangular metal parallel plates 81c, and a suspension plate extending between the lower sides of the two parallel plates 81c. 82c and a mounting plate 83c protruding outward on both sides from the two parallel plates 81c. And the suspension plate 8
A nut 85c is attached to substantially the center of 2c, and four attachment holes 86c are provided in the attachment plate 83c.

Using this mounting member 8c, the liquid ring damper 5
As shown in FIG. 12, the weight 6c is suspended through the mounting plate 83c along the side of the floor joist 212c.
The attachment 8c is attached to the floor joist 212c with a screw screwed into the floor joist 212c through the mounting hole 86c. Then, the shaft 52c of the liquid ring damper 5c is screwed into the nut 85c, and the liquid ring damper 5c is mounted on the fixture 8c. still,
The mounting structure in which the weight 6c is mounted on the liquid ring damper 5c is almost the same as that of the first embodiment. Other structures and construction methods are almost the same as those in the first embodiment, and thus description thereof is omitted.

Building unit 2 on the second floor of this unit building
Drop the weight on the floor of c to generate a heavy impact sound,
JI measuring sound intensity in the room of building unit 1 on the first floor
When measured by the measurement method specified in S, the sound pressure level at a frequency of 125 Hz was reduced by about 7 dB as compared with a case where a weight having the same weight was simply attached without the liquid ring damper.

(Embodiment 5) FIGS. 14 to 16 show still another embodiment of the present invention. FIG. 14 is a partially cutaway plan view of a floor panel of a building unit on the second floor, and FIG. D-
FIG. 16 is a cross-sectional view taken along a line D, and FIG.

A comparison between the fifth embodiment shown in FIGS. 14 to 16 and the first embodiment shown in FIGS. 1 to 8 shows that the wooden joist connecting member 7 d
And a weight 6d is suspended from the fixture 8d via a liquid seal damper 5d.
The floor beam 211d is approximately 286 mm long and 38 m wide.
m wood. Therefore, this fixture 8d
The structure in which the weight 6d is attached to the attachment 8d via the liquid seal damper 5d will be described.

The attachment 8d is almost the same as that used in the fourth embodiment. That is, as shown in FIG. 16, a parallel plate 81 made of two metal plates facing each other in a substantially triangular and substantially parallel manner.
d, a suspension plate 82d which extends across the lower side of the two parallel plates 81d, and a mounting plate 83d which protrudes outward on both sides from the two parallel plates 81c. And the suspension plate 82d
, A nut 85d is mounted substantially at the center, and four mounting holes 86d are provided in the mounting plate 83d.

Using this mounting fixture 8d, the liquid ring damper 5
As shown in FIG. 15, the structure in which the weight 6c is suspended through the mounting plate 83d extends along the side surface of the floor joist 212d.
The attachment 8d is attached to the floor joist 212d with screws screwed into the floor joist 212d through the mounting holes 86d. Then, the shaft 52d of the liquid ring damper 5d is screwed into the nut 85d, and the liquid ring damper 5c is mounted on the fixture 8d. still,
The mounting structure in which the weight 6d is mounted on the liquid ring damper 5d is almost the same as that of the first embodiment. The weight 6d is approximately 15kg
It is. Other structures and construction methods are almost the same as those in the first embodiment, and thus description thereof is omitted.

The building unit 2 on the second floor of this unit building
Drop the weight on the floor of d to generate a heavy impact sound,
JI measuring sound intensity in the room of building unit 1 on the first floor
When measured by the measurement method specified in S, the sound pressure level at a frequency of 125 Hz was reduced by about 5 dB as compared with the case where a weight having the same weight was simply attached without the liquid ring damper.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. Is also included in the present invention. For example, although the embodiment describes the floor structure of a unit building, the present invention is not limited to a unit building in which a building unit is installed in a factory or the like and a plurality of building units are installed at a construction site. That is, it may be a floor structure of a building that is built at a conventional site.

[0063]

According to the first aspect of the present invention, a fixture is attached to the side of the floor joist, and a weight is suspended from the fixture via a damper. Even if floor materials or floor joists vibrate by walking or dropping an object on the floor, the vibration of the floor joists is attenuated by the damper, and the natural vibration of the floor joists and the weight differs from the weight. This floor vibration is rapidly attenuated and reduced.

A floor structure in which a plurality of floor joists are attached to the opposing floor beams so as to extend substantially in parallel and a floor material is mounted on the floor joists. According to the present invention, the mounting tool, the damper, and the weight can be mounted so as not to protrude from the floor joist, and the mounting tool, the damper, and the weight do not hinder the floor material or the floor material from being mounted on the floor joist.

According to the second aspect of the present invention, a metal joist connecting member is attached across the side faces of the substantially parallel floor joists, and a weight is suspended from the metal joist connecting member via a damper. Therefore, even if a person walks on the upper floor or drops an object on the floor and the floor material or floor joist vibrates, the vibration of the floor joist is damped by the damper. Because the natural vibration of the weight is different from that of the floor beam,
This floor vibration is rapidly attenuated and reduced.

Further, even in a floor structure in which a plurality of floor joists are attached to the opposing floor beams so as to extend substantially in parallel and a floor material is mounted on the floor joists. In the invention, a metal joist connecting material is attached to the side of the floor joist so that the upper surface does not protrude from the upper surface of the floor joist,
Since the weight is suspended from the metal joist connecting member via the damper, the metal joist connecting member and the like do not interfere with the mounting of the floor material on the floor joist.

According to the third aspect of the present invention, a wooden joist connecting member is inserted and mounted between substantially parallel opposing floor joists, and a fixture is attached to a side surface of the joist connecting member. Since the weight is suspended via the damper, even if a person walks on the upper floor or drops an object on the floor, the floor material or floor joist vibrates, Since the vibration is attenuated by the damper and the natural vibration of the floor joist and the weight is different from the floor, the floor vibration is rapidly attenuated and reduced.

Further, even in a floor structure in which a plurality of floor joists are mounted so as to extend substantially parallel to the opposing floor beams and a floor material is mounted on the floor joists. In the present invention, the wooden joist connecting material is passed over the side of the floor joist so that the upper surface does not protrude from the upper surface of the floor joist, and a fixture is attached to the side of the wooden joist, and a damper is attached to the mounting tool. Since the weight is suspended through the floor, the wooden joist connecting member or the like does not hinder the mounting of the floor material on the floor joist.

According to the fourth aspect of the present invention, the damper has a sealed container including a rubber upper plate, a metal side wall, and a metal lower plate, and the upper plate is provided so as to penetrate the sealed container upper plate. A liquid seal comprising a shaft attached to the container, a viscous liquid filled in a sealed container, and a damping plate attached to the shaft in the sealed container with a small gap between the side wall of the sealed container. Since the damper is a damper, the shaft protruding above the upper plate of the sealed container of the damper is attached to a metal joist connecting material, a fixture, a wooden joist connecting material, etc., and a weight is attached to the side wall or lower plate of the sealed container. The vibration of the floor joist is greatly attenuated while passing through the damper due to the elasticity of the rubber upper plate and the viscosity of the viscous liquid.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a unit building according to an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view showing a building unit on the first floor.

FIG. 3 is a partially cutaway perspective view showing a building unit on the second floor.

FIG. 4 is a partially cutaway plan view of the floor panel of FIG. 3;

FIG. 5 is a sectional view taken along line AA of FIG.

FIG. 6 is a perspective view of a metal joist connecting member.

FIG. 7 is a partially cutaway plan view of the liquid ring damper.

FIG. 8 is a sectional view taken along line BB in FIG. 7;

FIG. 9 shows another embodiment of the present invention, and is a plan view showing a relationship between a floor beam or a floor joist and a liquid ring damper or a weight.

FIG. 10 shows another embodiment of the present invention, and is a plan view showing a relationship between a floor beam or a floor joist and a liquid ring damper or a weight.

FIG. 11 is a partially cutaway plan view of a floor panel of a building unit on the second floor, showing still another embodiment of the present invention.

FIG. 12 is a sectional view taken along line CC in FIG. 11;

FIG. 13 is a perspective view of a fixture.

FIG. 14 is a partially cutaway plan view of a floor panel of a building unit on the second floor, showing still another embodiment of the present invention.

FIG. 15 is a sectional view taken along line DD in FIG. 14;

FIG. 16 is a perspective view of a fixture.

[Explanation of symbols]

U unit building 1 building unit on the first floor 2 building unit on the second floor 21 floor panel 211, 211b, 211c, 211d floor beam 212, 212b, 212c, 212d floor joist 213 flooring material 3 roof unit 4, 4a, 4b metal joist Connecting material 5, 5a, 5b, 5c, 5d Damper (liquid sealing damper) 51 Sealed container 511 Upper plate 512 Side wall 513 Lower plate 52 Shaft 53 Viscous liquid (silicone oil) 54 Damping plate 6, 6a, 6b, 6c, 6d weight 7, 7d wooden joist connecting material 8c, 8d

Claims (4)

[Claims] 1. A floor structure in which a plurality of floor joists are extended across opposing floor beams and a floor material is mounted on the floor joists, a mounting tool is mounted on a side surface of the floor joists. A floor structure, wherein a weight is suspended from the attachment via a damper. 2. In a floor structure in which a plurality of floor joists are attached to opposing floor beams so as to be substantially parallel to each other and a floor material is mounted on the floor joists, the floor parallel joists of the substantially parallel opposing floor joists. A metal joist connecting material is attached to the side surface so that the upper surface does not protrude from the upper surface of the floor joist, and the weight is suspended via a damper on the metal joist connecting material. Floor structure. 3. A floor structure in which a plurality of floor joists are attached to opposing floor beams so as to extend in substantially parallel with each other, and a floor material is mounted on the floor joists. A wooden joist connecting material is inserted and attached in a state where the upper surface does not protrude from the upper surface of the floor joist,
A floor structure, wherein a fixture is attached to a side surface of the wooden joist connecting member, and a weight is suspended from the fixture via a damper. 4. A sealed container comprising a rubber upper plate, a metal side wall, and a metal lower plate, and a shaft attached to the upper plate while penetrating the upper plate of the sealed container. And a viscous liquid filled in a sealed container, and a damping plate attached to a shaft in the sealed container in a state where the gap between the side wall of the sealed container is reduced. The floor structure according to any one of claims 1 to 3, characterized in that: