JPH0446760Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a smokeproof wall that also has a sound absorption function.
Specifically, it is installed on the ceiling of a building, etc., and can extremely effectively suppress the flow of smoke in the event of an emergency such as a fire, and can also be prevented to some extent from the effects of smoke and heat. This relates to a smoke-proof wall that can effectively absorb and prevent noise.

The Fire Service Act, Building Standards Act, and related government ordinances require smoke-proof walls to be installed on the ceilings of buildings such as hotels, schools, and factories in order to meet certain standards. ing. This smoke barrier is something that obstructs the flow of smoke in the event of a fire, and according to the provisions of Article 28 of the Fire Service Act Enforcement Order, it is defined as a hanging wall that protrudes 50 cm or more downward from the ceiling surface and obstructs the flow of smoke. It is equivalent.

Therefore, in hotels, factories, etc., a smoke-proof wall is usually constructed by supporting a hanging wall of wired glass plates against the ceiling with a metal frame and hanging fittings such as bolts. This smoke-proof wall is made of glass plates, and it prevents the flow of smoke in the event of a fire without damaging the lighting, making it an effective smoke-proof wall, and this structure has become common. . In the event of a fire, the smoke barrier is exposed to high-temperature heat, and the high-temperature smoke collides with it at a considerable speed, so that considerable heat and external force are applied to the smoke barrier. For this reason, in the smoke-proof wall according to the conventional example, the smoke-proof effect is achieved by simply using a reinforced glass plate with wires instead of using transparent glass. However, even if it is made of wire-filled glass plates, in the event of a fire, the resulting heat and smoke will damage them, rendering them useless and rendering them useless as they fail to achieve their purpose and are often not used during normal times. , on the contrary, the noise is reflected by the smoke prevention piece and is superimposed,
In fact, smoke walls are a source of noise.

From this point of view, we focused on providing a smoke-proof wall with a sound-absorbing effect and tried to develop a smoke-proof wall with this function. By making effective use of the sound-absorbing function of firewalls, we have developed a smoke-proof wall that is both smoke-proof and sound-absorbing, and that can minimize the effects of smoke in the event of a fire.

For example, when this smoke-proof wall is installed on the ceiling of a place with a lot of foot traffic, a factory, etc., the noise is constantly absorbed, and a smoke-proof effect can be achieved in the event of a fire. Because of this, it is heat resistant and can withstand fires.
It can sufficiently absorb the velocity and energy of the generated smoke, and can sufficiently withstand the impact of smoke.

Therefore, the smokeproof wall according to the present invention will be explained with reference to the drawings.

In addition, FIG. 1 is a perspective view showing a part of the smokeproof wall according to one embodiment of the present invention, FIG. 2 is an explanatory diagram of the sound absorption mechanism of the soundproof box, and FIG. It is a side view which shows a part of smoke-proof wall based on another Example.

First, in FIG. 1, reference numeral 1 indicates the ceiling of a building or the like. At this ceiling 1, as usual, extend a wall 2 that hangs downward from the surface to a height of 51cm, for example.
Protrude more than cm. The hanging wall 2 has a sound insulation function in addition to a smoke prevention function, and may be made of any material such as a steel plate, but it is constructed of a metal frame wall as usual. You can also do that. Although it may be mounted in any manner, it can usually be mounted using mounting fittings such as bolts.

Next, a porous plate 4 is arranged approximately parallel to the hanging wall 2 with a predetermined air space 3, and a plate-shaped fixture is installed at the lower end between the porous plate 4 and the hanging wall 2. Connected by 5. That is,
The upper edge of the hanging wall 2 is attached to the ceiling 1 via a plate-shaped fixture, and the lower edge is also attached via a plate-shaped fixture 5. In addition, accommodation grooves are formed on the opposing surfaces of the upper and lower fixtures, and the upper and lower edges of the porous plate 4 are fitted into these grooves to facilitate attachment. In this case, as shown in FIG.
It is also possible to arrange porous plates 4 on both sides of the
As shown in FIG. 3, it is also possible to arrange the porous plate 4 only on one side. In either case, the porous plate 4, the hanging wall 2, and the plate-shaped fixture 5 can constitute at least one so-called sound-absorbing box, and sound can be efficiently absorbed.

That is, FIG. 2 is an explanatory view of the sound absorption mechanism of this sound absorption box, in which the surface porous plate 4 is made of a sintered body of metal or ceramic powder particles 4a. Holes are formed between these powder particles 4a, and the holes communicate three-dimensionally with each other to form three-dimensional communicating holes 4b. Therefore, when a sound compression wave enters from the direction of the arrow, it enters the air space 3 through the three-dimensional communication hole 4b, and in particular, the sound compression wave resonates with the air layer of the air space 3.
The energy is lost and the sound is absorbed. Furthermore, even if the smoke generated during a fire has a considerable velocity,
While passing through this three-dimensional communication hole 4b, a considerable amount of velocity energy is lost, and in this state it collides with the hanging wall 2.

Therefore, when we constructed the smoke-proof wall shown in Figure 1 in the factory building, the installation reduced factory noise by approximately 4 dB, and it was extremely well received by factory personnel.

In addition, a smoke-proof wall shown in Figure 3 was installed on the ceiling of the rising atrium in the hotel lobby, and at this time the sound-insulating wall was made of wire-filled glass plates to create a spatial effect. This also improves fire safety.
It was also effective in sound absorption.

In summary, the present invention is a sintered porous plate that leaves a predetermined air space on both sides or one side of a hanging wall that projects downward from the ceiling surface of a building, etc., and has communication holes that communicate three-dimensionally between the particles. It is constructed by arranging. Therefore, this smoke-proof wall has a structure in which a sound-absorbing box consisting of a hanging wall and a sintered porous plate is constructed on both sides or one side, so that smoke-proof and sound-proof effects can be achieved, as well as smoke prevention. This can also reduce the load in the event of a collision.

In other words, according to the Fire Service Act and related ordinances, smoke walls should protrude more than 50 cm below the ceiling as shown above.
It is covered with a non-combustible material that restricts the flow of smoke. Therefore, in the case of the present invention, in which a sound absorbing box is attached to at least one side, the porous plate is made of a non-combustible material such as metal or ceramics, and the flow of smoke is sufficiently hindered, Since a considerable amount of the velocity energy of the smoke is lost, the smoke-proofing effect can be achieved without any problems, and it will not be damaged in the event of a fire.

In addition, when sound waves pass through the thin (diameter = approximately 100μ) three-dimensional communication holes in the porous plate, they resonate with the air layer in the air space behind, and the sound energy is attenuated. This shows a great sound absorption effect.

In addition, as mentioned above, the porous plate is made of a sintered material such as metal powder or ceramics, but it is not economical.
From the viewpoint of light weight, Al or an alloy thereof is preferable.

When composed of powder of Al or its alloy, it not only has an extremely high sound absorption effect, but also
It also has a great anti-inflammatory effect, so even if the flame hits it, it will not spread to the adjacent ceiling. The above-mentioned hanging walls can be constructed according to the taste of the building, and for example, in addition to glass plates, they can also be made of heat-resistant steel plates, etc., and any material that has heat-resistant and sound-insulating properties can be used. But it's okay.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a part of a smokeproof wall according to one embodiment of the present invention, Fig. 2 is an explanatory diagram of its sound absorption mechanism,
FIG. 3 is a perspective view of a part of a smokeproof wall according to another embodiment of the present invention. Reference numerals 1... Ceiling, 2... Hanging wall, 3... Air space, 4... Porous plate, 4a... Powder particles, 4b... Three-dimensional communication hole, 5... Plate-shaped fixture.

Claims (1)

[Scope of Claim for Utility Model Registration] In a smoke-proof wall that includes a hanging wall hanging downward from the ceiling of a building, etc., with an air space at a predetermined interval from one or both sides of the hanging wall, 1. A smoke-proof wall that also has a sound-absorbing function, characterized in that a porous sintered plate having communication holes that three-dimensionally communicates between particles is arranged approximately parallel to a shaped wall and is integrated with the porous sintered plate.