JPH0369746A - Floor structure body - Google Patents

Abstract

PURPOSE:To decrease impact sound to a floor by forming an external frame of a plurality of floor girders, by installing ceiling hangers to floor beams arranged between the girders and by providing weights to the sides of the ceiling hangers. CONSTITUTION:An external frame 1 is formed of four wooden floor girders 1a and 1b, and four floor beams 2 are installed at equal intervals between the girders 1b on the opposite gable ends. Then floor boards 3 are fixed to the upper face of the external frame 1 and to the upper faces of the floor beams 2. Vertical connecting boards 4 and connecting hardwares 9 are installed in the direction intersecting the floor beams 2 at a right angle and are also fixed to the sides of the ridge-side floor girders and the floor beams 2. Then ceiling hangers 5 are installed between the vertical connecting boards 4 and the gable-side floor girders 1b, and weights, approximately weighing 2kg each, are installed to the sides of the ceiling hangers 5. Thereby impact sound reverberating to downstair rooms can be decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a floor structure for a building, and particularly to its sound insulation performance.

(Prior Art) Conventionally, as a floor structure constituting a wooden building unit or the like, the one described in, for example, Japanese Patent Application Laid-Open No. 62-55358 is known.

In this conventional floor structure, an outer frame is formed by a plurality of floor girders, and a plurality of floor girders arranged in parallel are constructed between opposing girders of the outer frame. It consists of a floor plate fixed to the top surface.

(Problems to be Solved by the Invention) However, in buildings constructed using such conventional floor structures, when an object falls, for example, a child living in an upper floor room may jump or run around. The sound of the floor impact when the floor was moved was echoing in the lower floor rooms, impairing the livability of the lower floor rooms.

Therefore, the present invention focuses on the above-mentioned conventional problems.

It is an object of the present invention to provide a floor structure that can reduce floor impact noise transmitted to a lower floor room.

(Means for Solving the Problems) The present invention has been made for the purpose of solving the above-mentioned problems, and in order to achieve this purpose, the floor structure of the present invention has a plurality of floor girders. In a floor structure in which a frame is formed, a plurality of floor beams arranged in parallel are constructed between opposing girders of the outer frame, and a floor plate is fixed to the upper surface of the floor beam, A ceiling hanging tree is installed between the opposing girders in parallel, the lower surface of the ceiling hanging tree is placed at a predetermined height lower than the lower surface of the floor beam, and a ceiling board is placed on the lower surface of the ceiling hanging tree. is fixed.

It is desirable to provide the ceiling hanging tree with a weight at a portion corresponding to the antinode of vibration of a predetermined frequency among the vibrations generated in the ceiling hanging tree.

(Function) Light floor impact sound when a lightweight object falls on the floor is mainly caused by the vibration of the floorboard, and the vibration is transmitted to the lower floor room by the solid wide width and air wide width. On the other hand, heavy floor impact noise when a heavy object falls onto the floor is mainly caused by vibration of the entire floor structure.

Therefore, in the floor structure according to claim 1, the ceiling hanging tree is installed between the opposing floor girders, and the lower surface of the ceiling hanging tree is placed at a predetermined height lower than the lower surface of the floor beam. between the top surface of the ceiling board and the bottom surface of the floor beam.
A gap equivalent to the difference in height between the bottom surface of the ceiling suspended tree and the bottom surface of the floor beam is secured, and the solid wide path of vibration is routed between the floor beam and the ceiling suspended beam without going through the floor beam. This is the route to take. Therefore, compared to the conventional structure in which vibration is directly propagated from the floor girder and floor girder to the ceiling panel, in this example structure, the length of the vibration solid wide path is extended, and the vibration solid solid width Since the cross-sectional area of the path is narrowed, the propagation of light floor impact sound to the downstairs room is reduced.

In addition, in the floor structure according to claim 2, by providing a weight at a portion corresponding to the antinode of the vibration of the ceiling hanging tree when the low sound that is desired to be reduced is generated, the vibration of the ceiling hanging tree is efficiently suppressed. As a result, vibrations of the entire floor structure can be damped, and low-pitched heavy floor impact noise can be reduced.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the structure of the floor structure of the embodiment will be explained based on FIGS. 1 to 4.

Fig. 1 is a plan view showing the floor structure of this embodiment, Fig. 2 is a sectional view taken along line 11-II in Fig. 1, and Fig. 3 is a sectional view taken along line III in Fig. 1.
-III sectional view and FIG. 4 are perspective views showing essential parts of the floor structure.

As shown in these drawings, in the floor structure of this embodiment, a rectangular outer frame l is formed by four wooden floor girders 1a, la, lb, and lb, and the outer frame l has four The wooden floor beams 2.2.2.2 are fixed. The four floor beams 2.2.2.2 are arranged in parallel at equal intervals, and the outer frame l
It is constructed between the opposing gable girders 1b and lb.

The floor plate 3 is fixed to the upper surface of the outer frame 1 and the upper surface of the floor beam 2.

Further, a vertical connecting plate 4 and a connecting fitting 9 are fixed to the side surface of the floor beam 2 to connect the adjacent floor beams 2.2 to each other.

The vertical connecting plate 4 and the connecting metal fittings 9 are provided in a direction perpendicular to the floor beam 2, the vertical connecting plate 4 is arranged at the center position in the longitudinal direction of the floor beam 2, and the connecting metal fitting 9 is arranged in the longitudinal direction of the floor beam 2. 2 at the span 1/4 point and at the span 3/4 point. Further, the upper surface of the vertical connecting plate 4 is arranged at a height that is flush with the upper surface of the floor beam 2 and the upper surfaces of the floor girders la and lb. Incidentally, the vertical connecting plate 4 and the connecting fitting 9 are also fixed to the surfaces of both beams 1a and 2 so as to connect the girder side floor size tp la and the floor beam 2 in the same manner.

Moreover, between the vertical connecting plate 4 and the gable side floor girder 1b,
A ceiling hanging tree 5 is installed, and both ends of the ceiling hanging tree 5 are fixed to the lower end of the side surface of the vertical connecting plate 4 and the lower end of the side surface of the gable floor girder 1b. Moreover, this ceiling hanging tree 5 is provided in parallel with the floor beam 2, and is arranged at the center position in the width direction between the adjacent floor beams 2.2. Further, the lower surface of this ceiling hanging tree 5 is arranged at a height lower than the lower surface of the floor beam 2 by 5 mm or more.

Fourth, the span 1 of the floor beam 2 is attached to the side surface of the ceiling hanging tree 5.
A weight 6 made of an approximately 2 kg iron plate is provided at the /4 position and the span 3/4 point (a portion corresponding to the antinode of vibration in the frequency band of 63 Hz).

The ceiling board 7 is fixed to the lower surface of the ceiling hanging tree 5 via the edge 8. That is, the upper surface of the field edge 8 and the floor beam 2
A gap of 5 mm or more, which corresponds to the difference in height between the lower surface of the ceiling hanging tree 5 and the lower surface of the floor beam 2, is ensured between the lower surface and the lower surface.

Next, the operation of the embodiment will be explained.

In the floor structure of this embodiment, the ceiling hanging tree 5 is installed between the vertical connecting plate 4 and the gable floor girder 1b, and the lower surface of the ceiling hanging tree 5 is connected to the floor beam 2. Since it is located at a predetermined height lower than the bottom surface, the top surface of the field edge 8 and the floor beam 2
A gap of 5 mm or more, which corresponds to the difference in height between the lower surface of the ceiling hanging tree 5 and the lower surface of the floor beam 2, is ensured between the lower surface and the lower surface.

In other words, the solid wide path of vibration does not pass through the floor beams 2,
Since the path passes through the gable side floor girder 1a, the vertical connecting plate 4, and the ceiling hanging tree 5, the structure of this embodiment is more In this case, the length of the vibration solid wide path is lengthened, and the cross-sectional area of the vibration solid wide path is narrowed, and the propagation of light floor impact sound to the downstairs room is reduced.

Furthermore, in this embodiment, since the lower ends of the adjacent floor beams 2.2 are connected by the vertical connecting plate 4 and the connecting metal fittings 9, the rigidity of the floor beams 2 is improved, and heavy electric power When something falls onto the floor (for example, when a child living in an upper floor room jumps or runs around), the vibration of the entire floor structure is suppressed, and heavy floor impact noise is reduced.

Also, since the weight 7 is provided on the side surface of the ceiling hanging tree 5 at the center position between the gable side floor girder lb and the vertical connecting plate 4 (corresponding to the antinode of vibration in the frequency 6: lHz band), The vibrations of the ceiling hanging tree 5 can be efficiently damped, and as a result, the vibrations of the entire floor structure can be damped, and the low a heavy floor impact noise can be further reduced.

Figure 5 is a graph showing the relationship between the average floor impact sound level and octave band center frequency, showing the experimental results for light floor impact noise, and Figure 6 is the average floor impact sound level, showing the experimental results for heavy floor impact sound. It is a graph showing the relationship between the octave band center frequency and the octave band center frequency. That is, in the floor structure of this embodiment, when a lightweight object falls, the vibration of the floor plate 3 can be suppressed over the frequency range of 125 Hz to 4 KH2, and the weight can be reduced. When an object falls, vibration can be suppressed over a frequency band of 63 fez to 4.1 (z).

The other side floor structure shown in FIG. 5 is a structure in which glass wool is provided in the space between the floorboard material 3 and the ceiling material 7 in the floor structure of the above embodiment. As shown in FIG. 5, as a result of an experiment, when a lightweight object falls, by providing glass wool, vibrations can be suppressed over a frequency band of 63 Hz to 4 KHz. That is, it is desirable to provide glass wool in order to improve sound insulation.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and even if there are design changes within the scope of the gist of the present invention, they are included in the present invention. It will be done.

For example, in the embodiment, a vertical connecting plate is provided between the opposing gable side floor girders, but this vertical connecting plate is not necessarily required. If a vertical connection plate is not provided, a ceiling hanging tree can be continuously installed between the opposing gable side floor girders, and both ends of the ceiling hanging tree can be fixed to the face of the gable side floor girder.

In addition, in the example, a weight was provided at the center position between the gable side floor girder and the vertical connection plate (corresponding to the antinode of vibration in the frequency 6:1llz band), but the position of the weight is limited to the example. I can't.

Further, an elastic body may be interposed between the ceiling hanging tree and the weight.

(Effects of the Invention) As explained above, in the floor structure of the present invention, it is possible to reduce the floor impact sound that resonates in the lower floor room, and it is possible to obtain the effect that the livability is improved.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a floor structure according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-I in FIG. 1, and FIG.
I-I11 sectional view, FIG. 4 is a perspective view showing the main parts of the floor structure, and FIGS. 5 and 6 are graphs showing the relationship between average floor impact sound level and octave band center frequency showing experimental results. be. l...-Outer frame la--Mold side floor beam lb...-Gable side floor beam 2...Floor small beam 3...-Floor plate 4...-Vertical connection plate 5--Ceiling suspension tree 6-・・Weight 7・・・Ceiling board 8・・・Nobori

Claims (1)

[Scope of Claims] 1) An outer frame is formed by a plurality of floor girders, a plurality of floor girders arranged in parallel are constructed between opposing girders of the outer frame, and a floor plate is formed on the upper surface of the floor girder. In the floor structure fixed to the floor structure, a ceiling hanging tree is installed between the opposing girders in parallel with the floor beam, and the lower surface of the ceiling hanging tree is installed at a predetermined height lower than the lower surface of the floor beam. 1. A floor structure comprising: a ceiling hanging tree; and a ceiling board is fixed to the lower surface of the ceiling hanging tree. 2) The floor structure according to claim 1, wherein the ceiling hanging tree is provided with a weight at a portion corresponding to an antinode of vibration of a predetermined frequency among the vibrations generated in the ceiling hanging tree.