JPH088229Y2 - Airtight device for soundproof door - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) An airtight device for a soundproof door according to the present invention is an opening provided on a wall surface that requires a high degree of sound insulation, such as a wall surface that partitions a studio of a broadcasting station. It is provided in a portion between the soundproof door that closes the portion and the wall surface in order to minimize the sound leaking from this portion.

(Prior Art) In a broadcasting station, the door for opening and closing the opening provided on the wall that separates the adjacent studios has a high level of sound so that sound does not leak between the adjacent studios. Sound insulation (for example, about 60 dB) is required.

For this reason, conventionally, the door itself is thick and has a structure having a high degree of sound insulation, and an airtight material is supported on one surface of the peripheral front surface of the opening and the outer peripheral edge portion of the rear surface of the door, When the door is closed, the airtight material is pressed between the front surface and the rear surface so that the sound leaking from between the rear surface of the door and the front surface of the wall is minimized.

FIG. 3 shows an example of an airtight device for such a soundproof door that has been conventionally considered.

A frame-shaped support plate 3 is fixed to the front surface (left surface in FIG. 3) of the wall 1 so as to surround the opening 2 formed in the wall 1. On the front surface of this support plate 3, three locking grooves 4, 4 are provided.
Are formed so as to surround the entire circumference of the opening 2, and the airtight materials 5 and 5 are locked in the locking grooves 4 and 4, respectively.

Each of the airtight members 5 and 5 is made of an elastic material such as silicon rubber so as to be hollow. When the soundproof door 6 is closed, the airtight members 5 and 5 are located on the rear surface of the soundproof door 6 (right surface of FIG. 3). And the front surface of the wall 1 are elastically compressed to maintain airtightness between both surfaces and reduce the sound leaking from between both surfaces.

(Problems to be solved by the invention) However, in the case of the conventional airtight device for the soundproof door configured as described above, since the same airtight members 5 and 5 are all used, it is not always sufficient. I could not get the sound insulation performance.

For example, according to an experiment conducted by the present inventor, when the hollow airtight materials 5 and 5 made of silicon rubber sponge, which are provided as shown in FIG. 3, are compressed by 5 mm when the soundproof door 6 is closed. The sound insulation at the portion where the airtight material is attached is shown by the solid line a in FIG. In addition, the compression amount of each airtight material 5, 5
When it was set to 8 mm, the sound insulation was as shown by the broken line b in the figure.

When sound leaks between adjacent studios, the sound that is sensitive to the human ear is a relatively high frequency such as over 1000 Hz, which is clear from the solid line a and the broken line b in FIG. As described above, in the case of the conventional airtight device for the soundproof door, the sound insulation performance in the important frequency range is not always sufficient.

The soundproof door airtight device of the present invention eliminates such inconvenience.

(Means for Solving the Problems) An airtight device for a soundproof door according to the present invention, like the airtight device for a conventional soundproof door described above, has an opening provided on a wall surface of a building and the opening can be closed freely. A soundproof door having a size and shape, supported on one surface of a front surface around the opening and a rear surface outer peripheral edge portion of the soundproof door, and when the soundproof door is closed, between the front surface and the rear surface. It is composed of an airtight material that is pressed.

Further, in the airtight device for the soundproof door of the present invention, at least the above-mentioned airtight material is provided, and the hardness and cross-sectional shape of the double airtight material and the hardness of the second airtight material are provided. And the cross-sectional shape are different from each other.

(Function) In the case of the soundproof door airtight device of the present invention configured as described above, the sound leaks from between the front surface of the wall and the rear surface of the soundproof door due to the cooperation of the first and second airtight members. It is possible to reduce the amount, and it is possible to sufficiently reduce the leakage of sound in the frequency range over 1000 Hz, which is particularly sensitive to the human ear.

(Embodiment) Next, the present invention will be described in more detail with reference to the illustrated embodiment.

FIG. 1 shows an embodiment of an airtight device for a soundproof door of the present invention,
FIG.

Similar to the conventional airtight device for the soundproof door, the opening 2 formed in the wall 1 is formed on the front surface of the wall 1 (left surface in FIG. 3).
A frame-shaped support plate 3 is fixed around the periphery of the support plate 3, and three locking grooves 4 and 4 are formed on the front surface of the support plate 3 so as to surround the entire circumference of the opening 2. ing.

First and second airtight members 5a and 5a are respectively locked in the respective locking grooves 4 and 4, but in the soundproof door airtight device of the present invention, they are supported in the middle portion. The hardness and cross-sectional shape of the first air-tight material 5a are different from the hardness and cross-sectional shape of the second air-tight materials 5b and 5b supported on the outer peripheral side and the inner peripheral side.

That is, the first airtight material 5a supported on the intermediate portion is made of silicone rubber sponge and formed into a tube shape like the airtight materials 5 and 5 (FIG. 3) which constitute the airtight device of the conventional soundproof door described above. Has been formed. However, the second airtight members 5b, 5b supported on the outer peripheral side (lower side in FIG. 1) and the inner peripheral side (also upper side)
Unlike the first airtight material 5a, is made of a hard neoprene rubber and has a rectangular cross section.

In the case of the soundproof door airtight device of the present invention configured as described above, the front surface of the wall 1 and the rear surface of the soundproof door 6 are produced by the cooperation of the first and second airtight members 5a and 5b provided in triple layers. It is possible to reduce the amount of sound leaking from between, and it is possible to sufficiently reduce the sound leak in the frequency range over 1000 Hz, which is particularly sensitive to the human ear.

For example, according to the experiment conducted by the present inventor, as shown in FIG. 1, the second airtight materials 5b and 5b are attached to the inner peripheral side locking groove 4 and the outer peripheral side locking groove 4, respectively. When the first airtight material 5a is installed in the locking groove 4 in the middle part and each airtight material 5a, 5b is compressed by 5 mm, the sound insulation at the airtight material installation part is shown by the chain line c in FIG. It became like.

Further, the first airtight material 5a is attached to the inner peripheral side engaging groove 4 and the intermediate part engaging groove 4 and the outer peripheral side engaging groove 4 is provided with the second airtight material 5b.
When the airtight materials 5a and 5b are each compressed by 5 mm, the sound insulation at the airtight material installation part is shown by the chain line d in FIG.
It came to show in.

As is clear from this experiment, the airtight device of the soundproof door of the present invention exhibits good sound insulation performance as a whole, and produces a sound with a relatively high frequency such as 1000 Hz which is particularly sensitive to humans. Dampen effectively.

(Effects of the Invention) The airtight device for the soundproof door of the present invention is configured and operates as described above, but it is possible to reduce the amount of sound leaking between the front surface of the wall and the rear surface of the soundproof door, and in particular, Since it is possible to sufficiently reduce the sound leakage in the frequency range over 1000 Hz that the human ear feels sensitive, it meets the requirements in places where high sound insulation is required, such as studios of broadcasting stations. It is possible to improve the efficiency of use of various spaces.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an embodiment of an airtight device for a soundproof door of the present invention, and FIG. 2 is a diagram showing sound insulation performance by the airtight device,
FIG. 3 is a partial sectional view showing an example of a conventional airtight device for a soundproof door. 1: Wall, 2: Opening part, 3: Support plate, 4: Locking groove, 5: Airtight material, 5a:
First airtight material, 5b: Second airtight material, 6: Soundproof door.

Claims (1)

[Scope of utility model registration request] 1. An opening provided on a wall surface of a building, a soundproof door having a size and a shape capable of closing the opening, a front surface around the opening, and a portion near a rear outer peripheral edge of the soundproof door. In an airtight device for a soundproof door, which is supported by one surface of the soundproof door and is composed of an airtight material which is pressed between the front surface and the rear surface when the soundproof door is closed, at least double layers of the airtight material are provided. At the same time, the airtightness device of the soundproof door is characterized in that the hardness and the cross-sectional shape of the first airtight material and the hardness and the cross-sectional shape of the second airtight material that are provided in duplicate are different from each other.