JP2934001B2 - Underfloor equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to an underfloor device used for a multi-story building, and in particular, an upper floor is used as an exercise facility such as a training room, a gymnasium, and a judo hall. The present invention relates to an underfloor device suitable for use in a building.

(B) Conventional technology In recent years, in order to make effective use of the premises in cities, attempts have been made to install sports facilities on the floor.

In this case, the propagation of noise and vibration downstairs has become a major problem. Conventionally, rock wool and lightweight concrete are laid on a concrete slab, and furthermore, a floor foundation apparatus using a bundle member having a vibration-proof rubber thereon. The floor is laid by.

Generally, noises that sound downstairs are classified into light noises generated when walking with slippers or the like and heavy noises generated when a person jumps up and lands. The former is a light floor impact sound generator (tapping). Machine), and the latter generates an impact sound by dropping a heavy floor impact sound generator (hang machine) consisting of tires for small cars to the upper floor,
By measuring this in a room downstairs, the sound insulation characteristics of the floor are measured.

(C) Problems to be Solved by the Invention The above-described floor grounding device has a predetermined sound insulation characteristic for a light sound produced by a tapping machine, but has a sufficient sound insulation effect for a heavy sound produced by a hang machine. It is difficult to use the room downstairs as a room where a quiet environment is required, such as a classroom, a lecture hall, or a hospital room.

On the other hand, for sound insulation downstairs, especially for heavy noise, it is effective to increase the mass of the slab, that is, to increase the thickness of the slab, but the slab must be sufficiently large to achieve a quiet environment. In order to increase the thickness, a robust column or the like that can withstand the slab is required, and the entire building is significantly heavier and the construction cost is significantly increased.

Therefore, the present invention prevents the propagation of noise and vibration, especially heavy noise, downstairs by applying an impact of the upper floor to the beam portion of the concrete slab, while having an extremely simple structure. It is an object of the present invention to provide a floor covering device that has been eliminated.

(D) Means for Solving the Problems The present invention has been made in view of the above circumstances, and, for example, as shown in FIGS. 1 to 3, the beam (1a) is provided at predetermined intervals (l). ...) on a concrete floor slab (2) laid on a concrete slab (1) having a large stiffening material (3) extending in a direction orthogonal to the longitudinal direction of the beam (1a). A deck plate (7) in which a steel plate is formed in an irregular shape is laid on the large pulling material via a cushion rubber (6) over substantially the entire floor area, and the deck plate (7a) in a portion where the beam (1a) is located is provided. A bundle member (5) having a male screw part (5a) and a female screw part (5b) screwed to each other is arranged on a concrete slab (1), and the large pulling material (3) is attached to the beam (1a). ) Is positioned and supported by the bundle member (5) at a portion where the parentheses are located.

(E) Operation Based on the above configuration, for example, when a person jumps on the floor material (13) and generates a heavy noise sound on the floor material (13), the heavy noise is generated by the large rigid material (3). ) And the bundle member (5), and acts on the concrete slab (1) of the beam (1a). The beam (1a) portion is significantly thicker than the normal slab (1b) portion, and the heavy noise is effectively absorbed by the thick concrete slab (1) having a large mass, Sounds downstairs are greatly reduced.

Also, the deck plate (7) laid over the entire area disperses the impact on the flooring (13), thereby dispersing the impact without excessively concentrating on the large pulling material (3), and thereby reducing the load. Works. In addition, beam (1) of concrete slab (1)
a) The interval (1) is much longer than the pitch (90 (cm)) of a general bundle member, for example, every 270 (cm), and therefore, the bundle member (3) having high rigidity is used for the bundle member (3). 5) is fixed, and even though the deck plate (7) laid over the entire area is provided, the deck plate (7) is interposed between the large attracting material (3) and the deck plate (7). The cushioning rubber (6) absorbs the lightweight sound on the flooring (13) and supports the flooring with excessive elasticity.

(F) Effects of the present invention As described above, according to the present invention, the beam (1a) provided on the ordinary concrete slab (1) is used as a mass for absorbing an impact load. Without increasing the thickness of the building and increasing the weight and construction cost of the building, it is possible to effectively absorb the impact sound, especially the heavy noise, acting on the upper floor, and keep the lower floor room in a quiet environment.

The interval (l) of the beams (1a) of the concrete slab (1) is much longer than the pitch (90 (cm)) of a general bundle member, for example, every 270 (cm), but has high rigidity. Since the bundle member (5) is fixed to the large attracting material (3), the floor member (13) can be supported with sufficient rigidity regardless of the arrangement of the bundle member (5) at the long interval.

Further, when the deck plate (7) is laid on the large pulling material (3) via the buffer rubber (6), the impact load on the floor material is dispersed and acts on the large pulling material (3), and Cushioning rubber (6)
Disperses the load of the deck plate (7) and propagates to the large attracting material (3), and together with the large rigid material (3),
Despite the arrangement of the bundle member (5) having a long interval, sufficient durability can be provided.

In addition, the cushioning rubber (6) between the large attraction material (3) and the deck plate (7) absorbs the impact noise, especially the lightweight sound, and supports the floor material (13) with an appropriate elasticity, and provides a gymnasium. It has a predetermined performance as a floor substrate device for exercise facilities such as.

The reference numerals in parentheses are for comparison with the drawings, but do not limit the configuration.

(G) Examples Hereinafter, examples of the present invention will be described with reference to the drawings.

When a gymnasium is installed on the upper floor of a heavy-weight building, for example, the top floor of a ten-story school or hospital, as shown in FIGS.
It is laid on the concrete slab 1 on the top floor (one floor below the roof). Like the other floors, the concrete slab 1 has a beam 1a extending in a predetermined direction at a relatively long interval l (for example, 2,700 mm), and the beam portion 1a is at least twice as large as the normal slab portion 1b. For example, the normal slab portion 1b has a thickness of 300 mm to 500 mm or more, while the normal slab portion 1b has a thickness of 150 mm. A bundle member 5 is fixed to a portion of the beam 1a on the slab 1, so that the interval of the bundle member 5 in the direction of the large attracting material 3 described later is equal to the interval 1 of the beam 1a. The interval m between the bundle members 5 in the direction along the beam 1a is set to about 900 mm, almost in the same manner as in the prior art. On the bundle member 5, a large attracting material 3 is extended in a direction orthogonal to the beam 1a, and a deck plate 7 is provided on the large attracting material 3 through a cushion rubber 6 over substantially the entire floor area. It is laid, and floor material 13 is further stretched thereon.

As shown in detail in FIG. 3, the bundle member 5 includes a male screw portion 5a, a female screw portion 5b screwed to the male screw portion 5a, and an anti-vibration rubber 5c. The large attracting material 3 is fixed by an upper nut 8 and lower nuts 9, 9 so as to be adjustable. The large attracting material 3 is extended at predetermined intervals m in a direction orthogonal to the longitudinal direction of the beam 1a, is made of a highly rigid steel material having a rectangular cross section, and has an upper surface 3a. A buffer member 12 is fixed on the upper surface 3a.
Is composed of a cushion rubber 6, a lower plate 10 that is baked and fixed to the lower surface of the cushion rubber 6, and an upper plate 11 that is baked and fixed to the upper surface of the cushion rubber. The upper plate 11 is made of a steel plate having a U-shaped cross section with both sides bent, and the bent portions 11a, 11a are configured to abut on the lower plate 10 to limit the amount of deformation of the cushion rubber 6. Have been. Further, a deck plate 7 is fixed to the upper surface of the upper plate 11, and the deck plate 7 is made of a wide member obtained by bending a damping steel plate or a normal steel plate into a trapezoidal wave shape,
It is laid almost all over the floor. On the upper surface 7a of the deck plate 7, a discarded plywood 13a, a vibration-proof sheet 13b
The floor member 13 composed of the surface member 13c and the floor member 13c is fixed.

Next, a method of installing the floor covering device 2 will be described.

The bundle member 5 adheres the bolts 5d fixed to the lower surface of the anti-vibration rubber 5c at predetermined intervals m on a line that is marked out at predetermined intervals l on which the beams 1a extend on the concrete slab 1, and so on. The level with respect to the slab 1 surface is adjusted by further adjusting the female screw portion 5b of the bundle member 5. Then, after all the bundle members 5 are fixed and adjusted, the large drawing material 3 is flowed in the direction orthogonal to the blackout line above the male screw portions 5a of these bundle members 5, and the upper nut 8 and the lower nut 9 , 9 is adjusted so that the height is adjusted to a predetermined level. Thus, a very rigid and highly rigid support portion is formed. And the upper surface 3a of the large attracting material 3
The cushioning member 12 is provided by fixing the lower plate 10 with an adhesive or a screw or the like.
On the upper surface, the bottom surface 7b of the deck plate 7 is fixed over substantially the entire floor surface with an adhesive or a screw. As a result, the floor foundation device 2 including the bundle member 5, the large attracting material 3, the buffer member 12, and the deck plate 7 is assembled. Further, on the upper surface 7a of the deck plate 7, a discarded plywood 13a, an anti-vibration sheet 13b and a surface material 13c are fixed with screws and an adhesive, and
Is configured.

Since the present embodiment is configured as described above, the impact and the bounce action when the competitor performs the exercise on the flooring 13 are:
It is absorbed by the cushioning rubber 6 of the cushioning member 12 via the deck plate 7, and can exercise well with proper elasticity. If the competitor falls for some reason and hits the head, elbows, knees, waist, etc., the shock absorbing rubber 6 carries the impact with a moderate softness, and furthermore, the vibration isolating rubber 5c
Carry the impact. Also, at this time, an impact acting on a point on the floor material 13 caused by the competitor is diffused in a plane by the deck plate 7 which has high rigidity and is spread over substantially the entire floor surface, The cushion rubber 6
, The elasticity performance and the softness performance which are substantially the same are maintained at any position of the floor material 13.

Also, when a person jumps and generates a heavy noise (heavy noise due to a soft impact body) on the flooring 13, the heavy noise is generated by the deck plate 7, the cushioning rubber 6, the large attracting material 3, the bundle member 5, The vibration is transmitted to the beam portion 1a of the concrete slab 1 via the vibration isolating rubber 5c. At this time, the cushion rubber 6 and the vibration-proof rubber
In 5c, the heavy noise cannot be sufficiently absorbed,
Since the beam 1a is much thicker than the normal slab 1b and the mass is greatly increased, the heavy noise is effectively absorbed by the beam 1a of the concrete slab 1, Sounds sounding downstairs are greatly reduced. Further, the lightweight sound is effectively absorbed by the floor material 13 and the cushioning rubber 6, and is further absorbed by the anti-vibration rubber 5c.

Next, a floor impact sound level test in the above flooring apparatus will be described.

Laying the layer building under construction the subfloor apparatus 2 described above, it was measured using a hang machine, in the 150mm of the slab according to the conventional method, generally weight sound insulation grade L _H -55
And the even spread lightweight concrete and glass wool as described above, but at most sound insulation grade L _H -50, those of subfloor apparatus 2 described above, to obtain a sound insulation grade L _H -45.

In addition, the bundle members 5, 5 are arranged on the support base portions at both ends in the longitudinal direction on a test concrete slab having a thickness of 150 mm, a width of 2,500 mm, and a length of 4,000 mm. Was installed and a floor impact sound level improvement test was conducted in accordance with JISA-1418 (method for measuring floor impact sound level at building sites). Lightweight sound insulation class L _L- 45 and heavy sound insulation class L _H Results within -45 were obtained.

Based on the above results, the impact sound from the heavy impact source and the impact noise from the lightweight impact source are also within the sound insulation class L-45, and the noise level on the sound source side of the sports facility such as a gymnasium is lower than the reception level on the lower floor. Has satisfied the allowable levels of ordinary classrooms, audio-visual rooms, and library rooms.

Further, a partially modified embodiment will be described with reference to FIG. 4 and FIG.

In the embodiment shown in FIG.
Is not the same thickness, and a smaller beam 1c thinner than the beam 1a is arranged in the middle of the large beam 1a. This means that strictly speaking
Although the sound insulation effect of the heavy sound propagating to the bundle member 5 on 1c is slightly affected, the heavy sound can be effectively shielded as a whole.

In the embodiment shown in FIG. 5, the beam 1a is arranged above the concrete slab 1 instead of below it.
The bundle member 5 is fixed thereon. Also in this case, there is no change in the sound insulation effect of the heavy noise, the heavy noise can be effectively isolated, and the bundle member 5 can be configured to be short.

In the above-described embodiment, the large attracting material 3 is configured to have a rectangular cross section. However, the present invention is not limited to this, and a shape steel such as an I-shaped steel may be used. The upper plate 11 of the cushioning member 12 may not be a U-shaped cross section, but may be a simple flat plate.

[Brief description of the drawings]

FIG. 1 is a side view showing a floor foundation apparatus in which the present invention is applied to a building having a multi-story structure such as an exercise facility on the upper floor, and FIG. 2 is a plan view thereof. FIG. 3 is an enlarged side view showing a part of the floor foundation device. FIG. 4 is a side view showing a partially modified embodiment, and FIG. 5 is a side view showing another modified embodiment. DESCRIPTION OF SYMBOLS 1 ... Concrete slab, 1a ... Beam, 2 ... Floor underlaying device, 3 ... Large drawing material, 5 ... Bundle member, 5a ... Bundle member male screw part, 5b ... Bundle member female screw part, 5c …… Anti-vibration rubber, 6… Buffer rubber, 7… Deck plate.

Claims (1)

(57) [Claims] An underlaying device laid on a concrete slab having beams at predetermined intervals, wherein a large rigid material is extended in a direction orthogonal to a longitudinal direction of the beams, and Then, a deck plate formed of a steel sheet in an uneven shape is laid over substantially the entire floor area via a cushion rubber, and male screws screwed to each other on the concrete slab in a portion where the beam is located. A floor covering device, comprising: a bundle member having a section and a female screw section; and a level adjustment support for the large attracting material at a position where the beam is located by the bundle member.