JPS6366977B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a partition structure that partitions a room into a room using partition plates such as panels. In recent years, efforts have been made to make effective use of space in buildings such as houses, offices, workshops, research institutes, etc., and to divide rooms as appropriate and use them, and to remove partitions and reuse them as the purpose of use changes. To configure
There is a growing demand for movable and variable partitions. On the other hand, in order to ensure the comfort of living or working spaces and from the perspective of energy conservation, the above-mentioned variable partitions (meaning movable variable partitions. The same shall apply hereinafter)
Even in the case of fixed walls, the same sound insulation, heat insulation, airtightness, etc. as regular fixed walls are now required. Therefore, a variable partition must sufficiently balance its variable structure with the various functions required of a normal fixed wall. In addition, partitions must be fixed between the ceiling and floor with a certain level of strength, which tends to be at odds with ease of installation and removal.Furthermore, when the partition is removed, the attached part cannot be used for living or working. It is necessary that no inconvenience be caused. In the conventional variable partition structure, for example, floor fixing fittings are attached to the lower edge of the partition plate, and via this fitting,
Methods such as fixing it to the floor with screws, etc., or interposing a fixing device with a jack structure between the ceiling and the upper edge of the partition plate and fixing it by pressure are used. was extremely inadequate. Furthermore, when a wall body is constructed from panels, it is necessary to connect the panels to each other for some reason. In conventional variable partition structures, metal devices and the like are used as connecting joints, but these are still not sufficient in terms of sound insulation and heat insulation. The inventors of the present application suppressed panel vibration and further improved sound insulation by using rubber elastic bodies with sufficient vibration damping properties as members for connecting and fixing panels when constructing variable partitions. They discovered what they could do and completed the present invention. The gist of the present invention is to provide an air layer between the partition plates on both sides, and a bonding material made of a material having rubber elasticity to connect the partition plates without any gaps and tightly fix the peripheral walls of the partition plates. As a material having rubber elasticity, a material with an absolute value of complex elastic modulus |E ^* | at 10 to 30°C of 4×10 ⁶ to 1×10 ⁹ dyne/cm ² and a loss coefficient (tan δ) of 0.2 or more is used. The partition board is a composite board formed by laminating plywood, glass wool board, and soft sound insulation sheet in this order, or a composite board formed by laminating plywood, soft sound insulation sheet, plywood, glass wool board, and soft sound insulation sheet in this order. It is in the configuration of the partition structure. Joints (both the connection of panels and the fixing of panels to the floor, etc., are collectively referred to as joints. The same applies hereinafter) made of materials with rubber elasticity are used depending on the flexibility, damping properties, etc. of this material. It has effects such as vibration isolation, damping, buffering, and sealing, and greatly contributes to the final partition performance, such as sound insulation, heat insulation, ease of construction, and ability to follow interlayer displacement. Rubber products generally have drawbacks in weather resistance and structural strength, but in the present invention, the absolute value of the complex modulus of elasticity |E ^* | of the rubber elastic material for bonding is set to 4×10 ⁶ to 1×
By setting it in the range of 10 ⁹ dyne/cm ² , conditions such as structural strength, damping performance, sound insulation performance, airtightness, etc. are effectively satisfied. In other words, the absolute value of the complex modulus |E ^* | is determined from the viewpoint of structural strength and fixed strength,
4×10 ⁶ dyne/cm ² or more is required, and it must be 1×10 ⁹ dyne/cm ² or less in order to prevent the propagation of sound through solid objects, as well as to ensure collision safety and appropriate minute deformation. is necessary. The dynamic properties of rubber elastic bodies vary greatly depending on vibration frequency and temperature. Therefore, it is difficult to define this uniformly, but between the two,
There is a temperature-frequency conversion law, and the usage conditions of partitions in houses, etc., especially the temperature, are limited to some extent, so the set vibration frequency of the loss coefficient (tanδ) is approximately
The value should be around 100Hz. According to the temperature-frequency conversion law, when 20℃ is the reference temperature,
From the temperature characteristics of the dynamic properties at a frequency of 100 Hz, the dynamic properties at a frequency of several KHz can be expected to be around 10°C. Therefore, as long as the specified range of dynamic properties is satisfied at 10 to 30°C, the frequency range required for practical use can be covered. In the present invention, the loss coefficient (tanδ) is
By setting it to 0.2 or more, preferably 1.0 or more,
It exhibits damping properties and further improves the sound insulation properties as a partition. The types of materials used are NR (natural rubber),
SBR, BR, IR, NBR, CR, IIR, EPDM,
PNR (norbornene rubber), PUR (urethane rubber)
In addition, many other materials having rubber elasticity can be used. Use these alone or in combination,
Further, these foams may also be used. It is also possible to perform surface treatment on the surface of the rubber connector or on the periphery of the partition plate. Further, for further reinforcement, a reinforcing frame made of metal or synthetic resin or the like may be used in combination. In addition, to improve dynamic performance etc., it is also good to mix solid content into the foam.
In addition to dynamic performance, it is also effective to add or insert a steel plate into the rubber member to improve creep resistance, weather resistance, etc. Since the partition structure according to the present invention uses a connector made of a rubber elastic material having the above characteristics, it has the following advantages and features. 1 Normally, in the interior walls of houses, in the partitions that are in contact with various sources of noise and vibration, rubber partition connectors (hereinafter simply referred to as rubber connectors) with the absolute value of the complex modulus of elasticity and the loss coefficient (tan δ) in the above range are used. ) shows a high soundproofing effect. For example, partition panels, particularly lightweight panels, often tend to provide effective sound radiating surfaces for mechanical excitation forces transmitted through the support. On the other hand, if the above-mentioned rubber joints are used, the vibration-proofing effect prevents the propagation of solid sound, resulting in vibrations of several Hz to several hundred Hz.
It functions as a vibration isolator against vibrations and sound waves, and can prevent the above problems. Further, for heat insulation and sound insulation, it is advantageous to have a double wall structure in which the wall bodies are further separated by an air layer. Although this double wall originally has high sound insulation properties, it may not exhibit sufficient sound insulation properties due to the sound waves propagating through the support rather than through the air layer. On the other hand, when the above-mentioned rubber joint is used, the two panels constituting the double wall are acoustically separated due to the vibration-proofing effect and sound/vibration damping effect in the rubber. 2. When the partition panels are joined using the joining tool, there is an effect of damping the vibrations, and the sound insulation properties of the panels are improved. The panel is vibrated by the sound from the noise source, creating a complex vibration state depending on the structure and fixing conditions of the panel, with high vibration peaks appearing especially near the natural frequencies of the entire panel system and each part. . This panel vibration has a close relationship with the indoor sound pressure on the opposite side, so suppressing panel vibration and reducing re-radiated sound is an important issue for improving sound insulation. However, in general, in order to suppress vibration, it is considered advantageous to improve the apparent rigidity of the panel by solidifying the fixation around the panel, and there is also a lot of actual measurement data that supports this, especially in the low frequency range. It is generally accepted. However, with the present invention, 100Hz
By setting the loss coefficient (tan δ) to 0.2 or more, a vibration suppressing effect appears, the vibration energy of the panel is absorbed into the rubber elastic material, and the sound insulation properties of the partition as a whole can be improved comprehensively. In particular, it has a great effect of suppressing the reduction in sound transmission loss near the coincidence frequency, which is a problem in sound insulation, and the resonance transmission frequency in the low frequency range that occurs in the double wall of the panel, and is extremely useful in practice. This effect becomes greater as the loss coefficient (tan δ) of the rubber connector increases. Additionally, in general, as the loss coefficient (tanδ) of a rubber elastic material increases, its hardness tends to increase, and when it is firmly bonded to a panel, it exhibits extremely excellent sound insulation performance in combination with the effect of rigidity. reach. 3. The sound insulation properties of a partition are greatly affected by the quality of airtightness, and in particular, the presence of gaps, even if they are only a few millimeters in diameter, reduces the sound insulation properties depending on the apparent gap ratio. At the same time, it also causes a decrease in insulation performance. To solve this problem, the rubber joints deform appropriately at the contact portion with the panel, and the two are in full contact with each other to maintain airtightness and exhibit excellent performance in terms of sound insulation and heat insulation. 4 Regarding insulation, in addition to preventing heat loss due to ventilation as described above, due to the high insulation properties of the rubber itself (thermal conductivity of approximately 0.2 Kcal/mhr℃), loss due to heat conduction in the joints is also prevented. It is small and has high insulation properties. For example, it will be about 1/6 of the size when a partition connector of the same shape is made of aluminum. 5 Appropriate holding strength is necessary to fix a partition for a long period of time, but the rubber joints described above do not maintain adequate strength across the board due to minute elastic deformations that occur over the entire contact surface with the panel. It becomes possible to hold the panel with strength. Furthermore, even though it becomes difficult to attach and detach movable partitions due to the deformation of the frame, which is common in wooden houses, etc., the elastic deformation of the rubber joints described above sufficiently absorbs the deformation of the frame, making it easy to attach and detach. also has the great advantage of almost no loss. 6. Since the impact load applied to the panel is also absorbed by the elastic deformation of the rubber joints, the impact resistance of the partition is also improved. The rubber joint according to the present invention is very different from the auxiliary fixtures in existing movable partitions that have a slight sealing effect and cushioning effect, and the rubber joint has a specific plurality of absolute values of elastic modulus and loss coefficient (tan δ) range. It is made of elastic material and exhibits excellent sound insulation performance and overall performance. Hereinafter, the present invention will be specifically explained with reference to Examples and Comparative Examples. Implementation row, comparative example ² of an experimental housing building consisting of 2 square rooms of 7.5 m 2
We installed partitions between the rooms and investigated their sound insulation properties. The partition consists of two panels 1a and 1, as shown in the partially omitted vertical cross-sectional view in Figure 1 and the partially omitted cross-sectional view in Figure 2.
A were placed opposite each other with an air layer 2 in between, and were fixed to the ceiling with fixtures 4 and to the floor with fixtures 5. In addition, it was fixed to the side wall (or house) with fixtures 6, and connecting fixtures were inserted between adjacent panels to connect them. Moreover, in order to prevent a gap from forming and a significant drop in sound insulation when panel connectors are not used, an overlay board 3 is attached to the panel surface as shown in FIG. 3. Panel 1a is made of 5.5mm thick plywood, 40mm thick glass wool and 1mm thick soft material with areal density of 3.2Kg/ ^m2.
A composite panel made by laminating PVC sound insulation sheets (trade name: Sandum, manufactured by Nippon Zeon Co., Ltd.) with a surface density of
It was 3.5Kg/ ^m2 . Furthermore, a partition with a double wall structure separating an air layer was similarly formed by using panel 1b instead of panel 1a. Panel 1b is residence 1a
The plywood part was changed to a sandwich structure of plywood - soft sound insulating sheet - plywood, and the overall areal density was approximately 14 kg/ ^m2 . Each panel is 240cm tall.
It was 90cm wide and about 5cm thick. The present invention uses a composite plate made of a combination of a soft sound insulating sheet and a glass wool sound absorbing material, which is known to have an excellent soundproofing function, and has a double wall structure with an air layer in the middle, thereby further improving the soundproofing performance. The purpose of the present invention is to obtain a partition structure with improved thermal insulation properties. The fixing devices 4, 5, and 6 each have a convex cross section, the thickness of the panel contact portion is approximately 1 cm, the thickness of the portion facing the air layer is approximately 2 cm, and the width of the connecting device is approximately 1 cm.
I installed them so that they were in close contact with each other. The panel fixings are made of chloroprene rubber (CR)
CR and wood were used as connectors. Two types were created, and the top panel was made from CR, and these were used in combination to form a partition. The dynamic properties of CR and NSX are shown in Table 1 below.

[Table] Sound insulation performance was measured by measuring the difference in sound pressure level between two rooms in accordance with JIS-A-1417 ``Method for measuring sound pressure level differences at building sites''. Also,
At the same time, the vibration acceleration level (VAL) of each part of the panel
(abbreviated as ) was measured. These results are summarized in Figures 4 to 10. In addition, Table 2 shows the evaluation results of the combinations of panels and joints, and sound insulation performance (500 to 2K, which is the most problematic in terms of noise prevention)
(expressed as sound insulation grade in Hz).

【table】

[Table] It is widely known that the sound pressure level on the sound receiving room side has a close relationship with the vibration acceleration level of the panel, but the sound insulation performance of the partition itself is limited as long as the acoustic radiation characteristics of the panel do not change. , can be evaluated or compared according to the vibration condition of the panel,
In addition, the sound from the sound source room side is propagated to the adjacent room using a route other than the partition as a detour. Therefore, when evaluating the sound insulation performance of a partition, it is best to take this vibration state into account.
More beneficial. From this point of view, when the above measurement results were examined, it was confirmed that the connector made of the rubber elastic body according to the present invention is extremely effective. These effects will be explained below. Figures 4 and 5 show that both the connectors are made of wood and the fixtures are made of CR (Experiment No. 1) and wooden (Experiment No. 2).
Room sound pressure level difference and VAL for
This is a comparison of the following. Regarding sound insulation, it is better to use CR in general except around 250Hz, and it is especially good at several dB at 500 to 2kHz, which is important for noise countermeasures.
It is about 10dB better than that. This is thought to be because the use of rubber elastic material improved airtightness and reduced sound leakage. In addition, when comparing the vibration state of the panel (the measurement point is the surface of the central part of the panel; the same applies hereinafter), a decrease in the vibration acceleration level of about 10 dB from a few dB was observed in the vicinity of 500 to 2 kHz, and the vibration of the panel was It can be seen that this is largely suppressed by the elastic material. This is thought to be due to the large vibration damping effect of the panel due to the rubber elastic body. As a result, the panel
It is judged that fixing with a rubber elastic body having the above-mentioned dynamic characteristics represented by CR is extremely effective. Figures 6 and 7 compare the sound pressure level difference between rooms and VAL for Experiments Nos. 1, 3, and 4. Here, CR is commonly used as a fixture, and the connectors are wood (Experiment No. 1), CR (Experiment No. 3), and CR is not inserted between panels (Experiment No. 3).
4) The sound insulation performance was compared when the panel was simply overlaid on the panel surface (hereinafter referred to as "without connector"). From Figure 6, compared to the case without connectors
Sound insulation performance is generally better when CR and wood are used, especially from a few dB above 500Hz.
An improvement of more than 10dB can be seen. Plus 125-250Hz
CR near 250-500Hz and above 1600Hz
It can be seen that this is an improvement of several dB more than that of wood. Also, when comparing the vibration conditions of the panels, the vibration acceleration level is generally CR<wood<
There are no connectors, and it has excellent vibration damping effects.
This clearly supports the above-mentioned trend in sound insulation performance. Therefore, it is recognized that the rubber elastic body defined in the present invention is very effective as a panel connector. From the above results, the present invention can be used as a panel fixing device and connector, that is, as a connector. It is clear from the CR example that using a rubber elastic material is extremely effective in improving sound insulation. Figures 8 and 9 are comparisons between Experiment No. 4 and Experiment No. 5 regarding CR and oil-extended norbornene rubber (NSX), which has better damping properties than CR.
(In this case, it is an example of using it as a fixture without a connector.) From this result, from the low frequency range to around 1kHz,
Almost the same, but about 5dB above 1600Hz
Using NSX shows better results.
Also, when comparing the vibration conditions of the panels, it can be seen that using NSX generally suppresses vibration by several dB. Therefore, it can be said that it is advantageous to use a member that has a large damping effect against vibrations of the panel. However, the reason why the sound insulation performance is not necessarily high in the midrange as shown in Figure 8 is probably due to the high hardness of NSX and the slightly inferior airtightness. It is true that the radiated sound volume is reduced. From this, it can be seen that it is particularly desirable to use an elastic body with high vibration damping properties as the connector. FIG. 10 compares the sound pressure level difference between the rooms in Experiment No. 6 and Experiment No. 7, in which a panel 1b type different from that in the previous experiment was used. Despite the increase in panel weight, CR was used for the fixtures and connectors (Experiment No. 6), while NSX, which has excellent vibration damping properties, was used for the fixtures but without connectors (Experiment No. 7). Compared to the above, an improvement in sound insulation is seen at frequencies above 500 Hz, indicating that the use of rubber elastic bodies as connectors is useful regardless of the panel form. As seen above, the sound insulation effect, especially in the mid to high frequency range above 500Hz, has a remarkable improvement in sound insulation performance.
This is an area where a reduction in sound insulation performance due to the coincidence effect of a rigid face member is a problem, and the present invention
The aim is to improve sound insulation performance by several dB or more in this area. In addition, through this experiment, we found that construction using rubber elastic bodies is extremely easy, and it has also become possible to construct partitions by yourself. In addition, in Experiment No. 3, it was revealed that not only sound insulation but also heat insulation had an extremely excellent heat transmission coefficient of approximately 0.3kcal/m ² hr℃, and there was virtually no condensation. . This is due to the fact that the rubber elastic body used this time ensures airtightness and that the rubber elastic body itself has a relatively low thermal conductivity. As described above, the partition structure according to the present invention exhibits extremely excellent functions not only in sound insulation, but also in many aspects such as heat insulation, dew condensation resistance, and ease of construction.

[Brief explanation of drawings]

1, 2, and 3 respectively show a partially omitted longitudinal sectional view, a partially lateral sectional view, and a lateral sectional view of a portion between panels of the partition structure according to the present invention, and FIGS. The figures are drawings showing the relationship between frequency and inter-room sound pressure level difference or the relationship between frequency and VAL for Examples and Comparative Examples, respectively. 1a...Panel, 2...Air layer, 3...Top board, 4, 5, 6...Fixing tool, 7...Connecting tool.

Claims (1)

[Claims] 1 An air layer is provided between the partition plates on both sides, and a bonding material made of a material having rubber elasticity connects each partition plate without a gap and tightly fixes the peripheral wall of the partition plate, and the material has rubber elasticity. as 10~
The absolute value of the complex modulus at 30℃ |E ^* | is 4×
10 ⁶ to 1×10 ⁹ dyne/cm ² and loss coefficient (tanδ)
0.2 or more, and the partition board is a composite board in which plywood - glass wool board - soft sound insulation sheet is laminated in this order, or plywood - soft sound insulation sheet - plywood.
A partition structure characterized by being a composite board made by laminating a glass wool board and a soft sound insulating sheet in this order.