JPH08240077A - Soundproof door - Google Patents

Abstract

PURPOSE: To provide a soundproof door generating an extremely low proper tone due to a shock and a vibration, having a small loss of sound insulation, and ensuring a light weight and inexpensiveness by holding both sides of a paper board vibration control material containing a rigid plate, on the middle rail and outer frame of a door. CONSTITUTION: Visco-elastic resin such as hot melt adhesive layers 13 and 13 is provided at least in the gap of one of layers formed out of one or more paper boards 12, 12, 14 and 14 stacked on top of each other, and paper board vibration control materials 11 and 11 are thereby formed. Then, decorative panels 10 and 10, and support plywood 15 and 15 functioning as rigid boards are pasted to one or both sides of each member 11 to form a composite member. Both side plate sections 2 and 2 are thereby constituted. Also, support members as a middle rail and an outer frame 4 laid within a door are arranged in the vicinity of the region of the section 2 having a large amplitude in a vibration mode. In this case, the internal space of the door formed out of the middle rail and the outer frame 4 is preferably provided with a sound absorbing material 5.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to soundproof doors. More specifically, the invention relates to a soundproof door used for buildings such as general houses, apartment houses, and office buildings.

[0002]

2. Description of the Related Art Conventional soundproof doors have mainly focused on sound insulation performance against sound waves propagating in the air. That is, when a sound wave propagating in the air is transmitted to the indoor side surface or the outdoor side surface of the soundproof door, the soundproof door is prevented from resonating and radiating the sound wave to the outdoor side surface or the indoor side surface of the soundproof door.

Such a soundproof door is composed of a member having a large mass and a high density so as not to resonate due to the energy of sound waves propagating in the air. For example, an iron plate or a lead sound insulation sheet is used as a core material, and a gypsum board, a plywood, a rubber plate or the like is attached to the core material.

[0004]

In the conventional soundproof door having the above-mentioned structure, when a direct vibration is applied to the door due to an impact at the time of opening / closing the door or a mechanical vibration of a piano or the like,
There is a problem in that it does not solve the essential noise because it generates the characteristic sound of the door.

Further, the conventional soundproof door has a problem that when the characteristic sound of the door itself coincides with the vibration of the noise source, a sound insulation defect occurs due to the coincidence effect in a high frequency band and the soundproof effect is deteriorated. In addition, if the weight of the door itself is increased in order to reduce the sound pressure level of the transmitted sound due to this sound insulation defect, the sound insulation defect frequency band shifts to a lower frequency band, and the sound insulation defect band becomes audible. There was a problem that it moved to an easy frequency band (around 1KHZ).

Further, the conventional soundproof door has a problem that the weight of the door is inevitably heavy and the opening / closing operation of the door is forceful. In particular, in a general house in which opening and closing operations are frequently required and children and the elderly must operate, the problem is large because the weight is heavy.

Furthermore, the conventional soundproof door uses a steel sheet or a soundproof sheet made of lead, so that the manufacturing cost of the door itself is high, and since it is heavy, it cannot be installed by one person and the installation cost is high. There was a problem that

In view of the above points, the present invention has an object to provide a soundproof door which is extremely small in characteristic sound due to impact vibration, small in sound insulation loss, lightweight and inexpensive, and low in installation cost. To do.

[0009]

SUMMARY OF THE INVENTION A soundproof door of the present invention comprises a board-type damping material having a viscoelastic resin disposed between at least one of the board-laminating layers, and a support for supporting the board-type damping material. And a member.

[0010]

When the soundproof door of the present invention is directly vibrated by the impact of opening and closing the door or mechanical vibration of a piano or the like, the paperboard of the paperboard damping material not supported by the supporting member. Vibrates, causing a shear gap between the paperboard and another paperboard supported by the support member. This misalignment shear is converted into heat energy and attenuated by the viscoelastic resin arranged between the laminated paperboards.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The soundproof door of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a soundproof door of an embodiment according to the present invention. FIG. 1 (A) is a front view of the soundproof door with a part of its surface cut away, and FIG. 1 (B) is the same. It is a longitudinal cross-sectional view of a soundproof door. 2 is a partially enlarged view of the upper end portion of FIG. 1B, and FIG. 3 is a partially enlarged view of the upper end portion of the vertical cross section of the comparative example of the soundproof door.

In FIG. 1, reference numeral 1 denotes both side plate portions 2,
It is an openable soundproof door including a wooden middle frame 3, a wooden outer frame 4, a side plate portion 2, a sound absorbing material 5 arranged in a gap defined by the middle frame 3 and the outer frame 4. . Reference numeral 6 is a door knob.

Of the above-mentioned middle bars 3, the middle bars provided in the horizontal direction are 1/6, 2/6, in the long side direction of the soundproof door 1.
It is arranged so as to be divided at a ratio of 2/6 and 1/6. still,
In the case where the soundproof door of this embodiment does not have a middle crosspiece, the middle crosspiece is arranged near the center of the soundproof door, especially since the vicinity of the center of the soundproof door is the region where the amplitude of the vibration mode is the largest. Incidentally, it is preferable to provide the middle rails not only in the horizontal direction as described above but also in the vertical direction to further increase the rigidity of the paperboard damping material.

The inner bar 3 and the outer frame 4 are made of a paperboard damping material 11
A support member having a role of indirectly supporting the board and increasing the rigidity of the paperboard damping material. Therefore, the middle rail 3 and the outer frame 4
The form is not limited as long as it can increase the rigidity of the paperboard damping material.

The both side plate portions 2 each have a three-layer structure, and in order from the outside, the decorative plate 10, the paperboard damping material 11, and the support plywood 15 are provided.
Are bonded and laminated. The paperboard damping material 11 is formed by stacking a paperboard 12, a hot melt adhesive layer 13, and a paperboard 14 in this order from the outside. As the paperboards 12 and 14, thick paperboards are used, and for example, those having a basis weight of about 250 to 650 g / m 2 are preferable. In addition, in the both side plate portions 2, the decorative board 10 bonded to the paper board 12 and the support plywood 15 bonded to the paper board 14
Have a role as a rigid plate that enhances the rigidity of the respective bonded paperboards.

The adhesive of the hot melt adhesive layer 13 has a loss elastic modulus (G ″) of 104 to 109 dyne / cm 2 and a loss tangent (tan δ) of 0.3 to 3.0, and its peak value in the operating temperature range. It is preferable that they are close to each other.
Unlike emulsion adhesives, there is no migration of water into the paper layer after application of the adhesive, and the rigidity of the paper does not decrease due to it, and the vibration energy absorption capacity of the hot melt adhesive layer and the vibration energy absorption of the paperboard Combined with the ability, it gives a good vibration damping and soundproofing effect.

As the hot melt adhesive, a base polymer such as a known ethylene-vinyl acetate copolymer, styrene copolymer, polyethylene, polyamide, nylon, polyester, polypropylene, etc. is added to a tackifier, a plasticizer and a softening agent. The agents, fillers, waxes, and softening inhibitors are appropriately mixed and used. The paperboard damping material for the soundproof door of the present invention is not limited to a hot-melt adhesive, and any viscoelastic resin can be used. For example, an acrylic synthetic rubber adhesive, EAA (ethylene-ethyl). Acrylate), EV
Consider using A (ethylene vinyl acetate [vinyl acetate content 20% or more]), SIS (styrene isoprene styrene), SEBS (styrene ethylene butene styrene), SBS (styrene butadiene styrene). To be

There are various possible laminated structures of the above paperboard damping material, but basically the following laminated structure is conceivable. Paperboard / HM / paperboard / EM / paperboard / HM / paperboard Paperboard / PE / paperboard / HM / paperboard / PE / paperboard Paperboard / HM / paperboard HM: hot melt adhesive EM: emulsion adhesive PE: polyethylene Above PE layer In addition to polyethylene, laminated resin or film having high rigidity such as polypropylene, polyethylene terephthalate, and polymethylpentene is used.

When the soundproof door of this embodiment is vibrated, this vibration propagates to the paperboard 12 through the decorative board 10, and shearing occurs between the vibration and the paperboard 14. The paperboard 14 is indirectly supported by the middle crosspiece 3 and the outer frame 4 via the support plywood 15 to enhance the rigidity. Therefore, the paperboard 14 does not resonate due to the vibration of the paperboard 12, and the vibration is efficiently converted into shear shear. Then, this misalignment shearing is attenuated by the hot melt adhesive layer 13 disposed between the laminated paperboards 12 and 14.

The experimental data of the soundproof door of this embodiment and the comparative example are shown below. In the soundproof door of this embodiment, the thickness of the decorative board 10 is 3 mm, the thickness of the paperboard damping material 11 is 3 mm, and the support plywood 1
The thickness of 5 is 3 mm, and the thickness of the entire door is 43 mm. On the other hand, in the comparative example having the same outer frame and middle rail as the soundproof door of the present embodiment shown in FIG. 3 and using no boardboard damping material, the thickness of the decorative board 20 is 4 mm and the thickness of the plywood 21 is Is 5 mm,
The total thickness of the door is also 43 mm (see Fig. 3).
Both soundproof doors are 1790 mm long and 800 mm wide.

This experiment was carried out and measured for each of the vibration methods of impact vibration and continuous vibration. In this experiment, a temporary partition was provided between two semi-anechoic chambers, the soundproof door was attached to the partition, the soundproof door was directly vibrated from one room side, and a microphone and a vibration sensor were used in the other room side. It is to measure. The vibration points were set at five points set at an interval of 115 mm at a position 230 mm above the central middle rail, and the average value was calculated. 25 microphones from the door
The vibration sensor was placed 0 mm apart, and the vibration sensor was attached directly to the soundproof door.

The impact vibration method was a method in which a golf ball having a diameter of 43 mm and a mass of 57 g, which was filled with clay, was suspended by a nylon thread and collided with the center of the door at a speed of about 1 m / sec. On the other hand, the continuous excitation method uses an electrodynamic exciter (rated exciter force: 10N), excites in the 10HZ to 5.5KHZ band, and transforms the force connected to the electrodynamic exciter. A container (affected mass: 1.1 g) was attached to the door surface via a cement stud.

FIG. 4 is a vibration acceleration waveform diagram of the present embodiment in the impact vibration experiment, and FIG. 5 is a vibration acceleration waveform diagram of the comparative example. In both figures, the vertical axis represents acceleration and the horizontal axis represents elapsed time. It can be seen that the soundproof door of this embodiment hardly vibrates.

FIG. 6 is a sound pressure waveform diagram of the present example in the impact vibration experiment, and FIG. 7 is a sound pressure waveform diagram of the comparative example. In both figures, the vertical axis represents the sound pressure level and the horizontal axis represents the elapsed time.
It can be seen that the sound pressure level itself is low and the sound pressure waveform is attenuated in a short time in the soundproof door of this embodiment.

FIG. 8 shows the difference in sound pressure level between the present example and the comparative example in the impact vibration test. In the figure, the vertical axis represents the sound pressure level and the horizontal axis represents the frequency. The solid line is the comparative example, and the broken line is the data of this example. It can be seen that the sound pressure of this example is about 10 dB lower than that of the comparative example over the entire frequency band.

FIG. 9 shows the difference in sound pressure level between this example and the comparative example in the above continuous vibration experiment. In the figure, the vertical axis represents the sound pressure level and the horizontal axis represents the frequency. The solid line is the comparative example, and the broken line is the data of this example. It can be seen that the sound pressure of this example is lower by about 5 dB to 15 dB than the comparative example over the entire frequency band.

FIG. 10 shows the difference in vibration acceleration between the present example and the comparative example in the continuous vibration experiment. In the figure, the vertical axis represents vibration acceleration / force (dB) and the horizontal axis represents frequency.
The solid line is the comparative example, and the broken line is the data of this example. It can be seen that the vibration acceleration / force of this example is about 20 dB lower than that of the comparative example over the entire frequency band.

From the above experiments, it can be understood that the soundproof door of the present embodiment attenuates reverberant sound earlier than the soundproof door of the comparative example, and is also excellent in normal sound insulation performance. Further, it can be understood that the characteristics are excellent not only in a specific frequency band but in all frequency bands.

Further, the sound insulation characteristics of the soundproof door of this embodiment and the conventional soundproof door using a lead sheet will be compared. FIG. 11 is a sound transmission loss diagram of the soundproof door of this embodiment having a TS-35 grade sound insulation performance, and FIG. 12 is a sound transmission loss diagram of a conventional soundproof door having a TS-35 grade sound insulation performance. In both figures, the vertical axis represents the sound transmission loss and the horizontal axis represents the center frequency of the 1/3 octave band. In addition, "TS" is the sound insulation performance standard of the soundproof door of the Japan Institute of Architecture. Also,
The soundproof door of this embodiment has a TS between 125HZ and 500HZ.
Although it is 1 dB below the -35 class sound insulation standard, according to the above-mentioned standards of the Japan Institute of Architecture, it is considered that TS-35 class is accepted because it is treated as a measurement error in the 1 dB range in this frequency band. Moreover, the conventional soundproof door is 2 dB below the sound insulation standard of TS-40 grade in the band near 1 KHZ, but according to the standard of the above-mentioned Architectural Institute of Japan, no measurement error is recognized and TS-35 grade is recognized. It is not too much.

As described above, the soundproof door of this embodiment has a thickness of 43 mm and a weight of 21 kg, while the conventional soundproof door uses a 0.5 mm thick lead sheet and has a thickness of 55 mm and a heavy weight. It is 42.5 kg. Thus, it can be seen that the soundproof door of the present embodiment has approximately the same weight but has the same sound insulation characteristics.

The present invention is not limited to the above-mentioned embodiment, and for example, the material and the number of the middle crosspiece, the presence or absence of the decorative plate or the supporting plywood, the material, the number of laminated layers, etc. can be appropriately determined. It can be arbitrarily changed and implemented.

[0033]

As described above, since the soundproof door of the present invention is excellent in the vibration damping performance of the door itself, it does not resonate with the impact vibration directly applied to the door due to the impact at the time of opening and closing the door,
The essential noise can be solved.

Further, since the soundproof door of the present invention is excellent in the vibration damping performance of the door itself, the sound insulation loss due to the coincidence effect in the high frequency band is unlikely to occur, and by disposing the middle crosspiece paying attention to the vibration mode, the low frequency band in Resonance can be reduced and an excellent soundproofing effect can be provided.

Furthermore, the soundproof door of the present invention is light in structure and can exhibit the sound insulation performance of the conventional soundproof door with about half the weight.

Further, since the soundproof door of the present invention uses the paperboard type damping material and does not use the iron plate or the lead sound insulating sheet, the manufacturing cost is low and the installation cost is low because it is lightweight.

[Brief description of drawings]

FIG. 1 is an explanatory view of a soundproof door of an embodiment of the present invention, FIG. 1 (A) is a front view in which a part of the surface of the soundproof door is cut away, and FIG. 1 (B) is a vertical section of the soundproof door. It is a side view.

FIG. 2 is a partially enlarged view of an upper end portion of FIG.

FIG. 3 is a partially enlarged view of an upper end portion of a vertical cross section of a soundproof door of a comparative example.

FIG. 4 is a vibration acceleration waveform diagram of the soundproof door of the present embodiment in an impact vibration test.

5 is a vibration acceleration waveform diagram of the soundproof door of the comparative example of FIG.

FIG. 6 is a sound pressure waveform diagram of the soundproof door of the present embodiment in the impact vibration test.

7 is a sound pressure waveform diagram of the soundproof door of the comparative example of FIG.

FIG. 8 is a sound pressure spectrum diagram showing a difference in sound pressure level between the soundproof door of the present example and the soundproof door of the comparative example in an impact vibration test.

FIG. 9 is a sound pressure spectrum diagram showing a difference in sound pressure level between the soundproof door of the present example and the soundproof door of the comparative example in a continuous vibration test.

FIG. 10 is an acceleration spectrum diagram showing a difference in vibration acceleration between the soundproof door of the present example and the soundproof door of the comparative example in a continuous vibration test.

FIG. 11 is a sound transmission loss diagram of the soundproof door of the present embodiment. In the band from 125HZ to 4KHZ, TS-3
Also shown is a sound insulation standard graph for grades 0, 35 and 40.

FIG. 12 is a sound transmission loss diagram of a soundproof door using a conventional lead sheet having a TS-35 grade sound insulation performance.
In the band from 125HZ to 4KHZ, TS-30, 3
Also shown is a sound insulation standard graph for grades 5 and 40.

[Explanation of reference numerals] 1 soundproof door 2 both side plate portions 3 middle rail 4 outer frame 5 sound absorbing material 6 door knob 10 decorative board 11 paperboard damping material 12, 14 paperboard 13 hot melt adhesive layer 15 support plywood 20 decorative board 21 plywood

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kaoru Shimura 1-33-14 Kamakura, Katsushika-ku, Tokyo

Claims (6)

[Claims] 1. A paperboard damping material having a viscoelastic resin disposed between at least one layer between layers of laminated one or more paperboards, and a support member for supporting the board damping material. Soundproofing door. 2. A paperboard damping material having a viscoelastic resin disposed between at least one layers of one or more paperboard laminated layers, and a rigid board disposed on one or both sides of the paperboard damping material. A soundproof door having a composite material and a support member supporting the composite material. 3. The soundproof door according to claim 1, wherein the viscoelastic resin is a hot melt adhesive. 4. The support member according to claim 1, wherein the support member is disposed in the vicinity of a region in which the vibration mode of the paperboard damping material or the composite material has a large vibration mode. Soundproof door. 5. The soundproof door according to claim 1, wherein the support member is a middle rail and an outer frame provided inside the door. 6. The soundproof door according to claim 5, wherein a sound absorbing material is arranged in a space inside the door formed by the middle rail and the outer frame.