JP4179972B2 - Partition wall structure - Google Patents

Description

  The present invention relates to a partition wall structure of a building, and more particularly to a partition wall structure capable of preventing a coincidence effect and improving soundproofing and sound insulation performance.

  As a dry partition wall for buildings or works, a so-called framed lightweight steel partition wall in which building interior board material (board building material) such as gypsum board or calcium silicate board is attached to a stud stud made of steel is widely used. It is offered to. In this type of partition wall structure, the steel studs are aligned and arranged at predetermined intervals along the wall core, and the upper end portion and the lower end portion of the steel stud are supported by the ceiling runner and the floor runner, respectively. Board building materials are fixed to the studs made of steel, and a vertical wall surface by the board building materials is formed on the indoor side.

  As another type of dry partition wall structure, a partition wall having a non-stud structure or a studless structure in which steel studs are omitted is known in order to improve sound insulation performance and workability of the partition wall. This type of partition wall has a configuration in which board materials reinforced by reinforcing ribs or the like are attached to a ceiling runner and a floor runner, as disclosed in, for example, Japanese Patent Application Laid-Open Nos. 2002-213038 and 9-4096. .

With recent demands for high airtightness and high thermal insulation in residential buildings, various studies have been conducted on improving soundproofing and sound insulation performance of joinery and outer walls. As a result, in recent buildings, noise transmitted from the outside of the building to the room is greatly reduced by improving the soundproofing and sound insulation performance of the fittings and outer walls, etc. Thus, the background noise level in the room is considerably low. Reduced to noise level. On the other hand, such a decrease in indoor background noise is the result of making residents relatively aware or aware of the presence of noise generated indoors and noise of other residences transmitted through the boundary walls. Invited. For example, from the sound of hanging cabinet doors, the sound of indoor doors, wall impact sounds, walking sounds, conversations, and other indoor sound sources such as indoor electrical products, indoor air conditioning equipment, ventilation equipment, acoustic equipment, musical instruments, etc. The generated sound is transmitted to other rooms through indoor partition walls or door walls, and even the level of noise that has been canceled by the background noise is strongly recognized or recognized by residents. Is occurring.
JP 2002-213038 A Japanese Patent Laid-Open No. 9-4096

Conventionally, in order to improve the soundproofing and sound insulation performance of the wall body, the mass of the wall body is increased, the solid propagation sound is blocked by eliminating the noise bridge, etc., or the air propagation sound is blocked by opening the wall or sealing the gap. Various measures have been adopted.

  However, these measures require changes to the design of the wall structure, the addition of special soundproofing / sound insulation means, or the use of relatively expensive members or parts. For example, there are cases that are difficult to adopt in practice.

In addition, as described above, gypsum board or calcium silicate board is generally used as the board building material that constitutes the partition wall of the dry method, but when this type of board building material is used as a wall surface material, 1600 In a high-frequency sound range exceeding 1700 Hz, a characteristic that the sound insulation performance of the wall body decreases without depending on the mass law occurs. This phenomenon is known as a coincidence effect that occurs due to the relationship between the incident angle of the air- borne sound incident on the wall surface and the bending wave of the wall body. In order to eliminate such a coincidence effect, measures to adjust the specific gravity of the building material board, or to form a rib or weight part on the back of the building material board, and to intentionally change the mass distribution of the wall surface have been used. Has been adopted.

  However, it is difficult to easily eliminate the coincidence effect even with such measures (adjustment of mass distribution) in dry partition walls designed to exhibit high sound insulation performance such as sound insulation grade (JIS A 1419) D-55. Therefore, it was necessary to take further measures.

  The present invention has been made in view of such circumstances, and its purpose is to eliminate the coincidence effect without modifying the wall structure, thereby improving the sound insulation performance. The object is to provide a partition wall structure.

  The present invention also provides an inexpensive means for reducing the sound and sound insulation performance of the wall without changing the design of the wall structure, adding special sound or sound insulation means, or adopting relatively expensive members or parts. An object of the present invention is to provide a partition wall structure that can be improved by a dry method.

The present inventor uses a vibration-damping adhesive on the partition wall of the dry construction method to bond the board building materials to each other, conducts various sound insulation performance tests as will be described later, and acts on the vertically built board building materials. As a result of confirming the strength of the wall-specific requirements such as the peel strength of the face material or the strength of the face material against the shear stress, it was confirmed that the destruction of the board building material preceded the peeling or shear failure of the adhesive surface. Based on this, the present invention has been achieved. That is, the present invention
With the board building materials to each other of the same material is thus bonded to the adhesive to form a wall, partition walls dry method of forming a portion (17,18,19,20,21) on the rear surface of the board building materials constituting the rib or weight In the partition wall structure that is a structure and generates a coincidence effect of the wall body due to noise in a high frequency range of 1600 to 4000 Hz ,
The adhesive comprises an acrylic resin emulsion, an ethylene vinyl acetate resin emulsion, NBR or SBR latex, or a mixture of a plurality of latexes. The specific gravity after curing is 0.95 to 1.2, and at least 400 after curing. % of a vibration-damping adhesive which exhibits elongation, loss factor of the composite material adhered board building materials to each other use the damping adhesive having a 0.1 or more curing properties, 1600～4000Hz The partition wall structure is characterized in that the coincidence effect due to the noise in the high frequency region is suppressed by the vibration damping property of the adhesive .

  In the partition wall structure in which the wall surface is formed by a board building material such as gypsum board or calcium silicate board, the coincidence effect is generated as described above, which reduces the sound insulation effect against noise in the high frequency range of 1600 to 4000 Hz. According to the above configuration, such a coincidence effect is obtained by using a vibration damping adhesive having a hardened property (damping property) having a loss factor of 0.1 or more of a composite material in which the board building materials are bonded to each other. It can be suppressed by bonding them together. Based on the results of various tests conducted by the present inventors, even when such a vibration-damping adhesive is used, the vertically built board building material exhibits sufficient peeling resistance, and the board building material. It was found to withstand shear stress acting on

  According to the partition wall structure of the present invention, conventionally, a partition wall structure in which a desired sound insulation class (JIS A 1419), for example, a sound insulation class D-55, has not been obtained due to a decrease in sound insulation performance due to the coincidence effect. Even so, by adhering the board building material using the vibration-damping adhesive, the sound insulation performance exceeding the desired sound insulation grade (D-55) is improved.

  The loss factor above is calculated by attaching the center of the surface of a composite material with two 12.5mm thick gypsum board (JISA6901) bonded with this damping adhesive and attaching it to the end. The response signal obtained with the accelerometer is analyzed with an FFT analyzer and the loss factor is measured as a reference.

Conventionally, vibration-damping adhesives used for automobile bodies and the like are known as vibration-damping adhesives, but these are applied to coated steel sheets used for car bodies, so to speak, as paints. on may be limited to Do using a little, this kind of damping adhesive is intended to suppress the propagation of solid vibrated by the vibration absorption capacity, and input to the wall was not air-borne sound is intended to prevent the transmission between the chambers. In addition, a technique for applying the vibration damping effect of such a vibration damping adhesive to floor materials to prevent generation of floor impact noise and propagation of solid vibration has been proposed in the construction field. In addition, it is only intended for use in floor structures where stress in the direction perpendicular to the construction surface of the board building material acts mainly, and in the case of floor structures, the flooring material such as wood is used. Underneath it is a rubber material, sponge material sheet, asphalt sheet, gypsum board, plywood, etc., which is composed of several different materials with different thicknesses and / or elastic moduli to form a structural material that can be used for sound insulation and control. It is customary to take measures against vibrations, and there are cases where the floor is made of concrete, so the coincidence effect has hardly been a problem.

According to the present invention, by using the vibration-damping adhesive in place of a conventional adhesive such as a vinyl acetate adhesive, the coincidence effect that is a phenomenon caused by the incidence of air- borne sound is eliminated. The partition wall structure of the dry construction method with improved sound insulation performance can be provided by the above, and the design change of the wall structure, addition of special soundproof / sound insulation means, or the adoption of relatively expensive members or parts, etc. Without performing, the soundproofing and soundproofing performance of the dry partition wall can be improved by inexpensive means.

According to a preferred embodiment of the present invention, the vibration-damping adhesive is provided with a peeling or shearing force between the gypsum board base paper and the gypsum core prior to peeling or shearing of the adhesive surfaces when the gypsum boards are bonded to each other. It is prepared so as to exhibit sufficient peel strength and shear strength to cause fracture. Compared with a partition wall with the same structure using conventional adhesives, the partition wall in which the board building material is bonded with such a vibration damping adhesive has a coincidence as an effect of the combination of the board building material and the vibration damping adhesive. The effect is considerably suppressed, and the sound insulation performance can be remarkably improved.

  The base resin material used in the vibration damping adhesive is preferably one having a relatively large elongation of the cured film, but the vibration damping performance of the laminated composite material of the board building materials is not determined by itself. Absent. As the vibration-damping adhesive, an acrylic resin emulsion-based adhesive can be suitably used. If desired, various additives used in ordinary emulsions such as preservatives, antifungal agents, antifreezing agents, viscosity modifiers, plasticizers, and the like may be appropriately added to the adhesive. Furthermore, carbon black, titanium white, aerosil and various inorganic fillers may be added as appropriate. However, excessive addition causes a reduction in vibration damping performance, so it is preferable to regulate the addition amount to 20% or less. . The damping adhesive can be applied by manual work with a spatula, brush, trowel, etc., but automatic application methods using mechanical equipment such as roll coaters, spreaders, and airless sprays are adopted. May be.

The application amount of the vibration-damping adhesive is preferably set to 200 to 1000 g / m ² , more preferably 400 to 800 g / m ² . If the coating amount is set to a smaller amount than this range, the adhesive layer after curing is difficult to exert sufficient adhesive force, reducing the intended solid propagation sound, preventing sufficient coincidence effect, and further improving the sound insulation performance. It is thought that it becomes difficult to achieve each action. On the other hand, even if the coating amount is set to be larger than the above range, the action of the vibration-damping adhesive is not improved in accordance with the coating amount. Conversely, the weight of the structure is increased and the cost is increased. Furthermore, since adverse effects such as deterioration of workability are likely to occur, it is desirable from the viewpoint of efficiency to set the coating amount within the above range.

  The damping adhesive may be applied to the entire surface of the board building material on the entire wall surface, or may be selectively applied only to the wall surface portion near the sound source or the vibration generating source. Further, the vibration-damping adhesive may be applied only between two board building materials, or may be applied to each bonding surface in a state where three board building materials are bonded. Furthermore, a damping adhesive is applied to the joint surface between the board building material and the runner, and the joint surface between the board building material and the stud (stud), and these members are bonded to each other with the vibration damping adhesive. You may do it. That is, according to the present invention, the sound insulation performance of the partition wall can be effectively and efficiently improved according to the arrangement and use of the partition wall, which is also beneficial in this respect.

  The viscosity of the vibration-damping adhesive is desirably in the range of 10 to 500 Pa · s, and a structural viscosity index (SVI value) of 2.5 or more and high thixotropy can be preferably used. If the viscosity is reduced too much, the damping adhesive will penetrate excessively into the board surface when applying the damping adhesive. As a result, it will be difficult to secure the adhesive force, and it will be scattered and run off. Workability deteriorates for the reason. On the other hand, if the viscosity is too high, when applying the vibration-damping adhesive, a trowel or a spatula is felt heavy, the spreadability is poor, and problems are likely to occur from the viewpoint of workability.

  The solid content of the vibration-damping adhesive is preferably in the weight ratio range of 35 to 60 wt%. If the weight ratio of the solid content is too low, the specific gravity of the vibration-damping adhesive is also lowered, it is easy to cause penetration into the board surface, and the content of the active ingredient is also reduced, resulting in a decrease in adhesive strength. There are concerns. On the other hand, if the solid content is too high, the viscosity of the vibration-damping adhesive also increases, and the workability deteriorates.

The specific gravity of the vibration-damping adhesive after curing, solid content, in conjunction with viscosity, but is intended to be defined in relation to these, the case of adding various inorganic fillers, the vibration-damping properties added amount is too large In the present invention, the specific gravity increased by adding the inorganic filler is 1.2 or less .

The adhesive strength of the vibration-damping adhesive after curing is such that the tensile strength in a state where the gypsum boards are bonded together causes material destruction of the board base paper and the gypsum core material (gypsum core). Modulus of the damping adhesive after curing, arbitrary desired to be in the range of 2～100MPa. In the present invention, the elongation rate of the vibration-damping adhesive after curing is at least 400%. If the elastic modulus and elongation of the vibration damping adhesive are below this range, the vibration damping adhesive will not exhibit the desired adhesive force, and a creep phenomenon will occur in summer, or the board building material will peel off. There are concerns about the occurrence of this phenomenon.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an exploded perspective view of a partition wall according to a first embodiment of the present invention, and FIGS. 2 and 3 are a longitudinal sectional view and a transverse sectional view of the partition wall shown in FIG.

  The partition wall W includes a floor runner 2 and a ceiling runner 3 made of lightweight steel. The floor runner 2 is disposed on a floor base F such as a concrete slab or a floor mortar base, and extends on the floor base F substantially horizontally and in a wall core direction. The floor runner 2 is fixed to the floor base F by a fixing tool (not shown) such as a driving pin disposed at an interval of about 900 mm. The ceiling runner 3 is fixed to a ceiling base C such as a lightweight steel ceiling base material or an upper floor concrete slab by fixing means (not shown) such as welding, a tapping screw or an anchor. The ceiling runner 3 faces the floor runner 2 and extends substantially horizontally and in the direction of the wall core.

  The upper end portion and the lower end portion of the underboard 10 are fixed to the floor runner 2 and the ceiling runner 3 by a locking tool 15 such as a tapping screw. The hollow portion 6 is defined inside the partition wall W, and the heat insulating and sound absorbing material 5 is disposed in the hollow portion 6. The underboard 10 is made of, for example, a gypsum board having a width of 600 to 1200 mm and a plate thickness of 12.5 to 15 mm, and the heat insulating and sound absorbing material 5 is made of, for example, a glass wool mat or a glass wool molded plate having a thickness of about 25 to 50 mm. .

  The gypsum-based adhesive 20 is dotted in a row on the back surface of the underboard 10 (inner side surface of the partition wall W) with an interval of about 150 to 300 mm in the vertical direction, and the strip-shaped second board piece 18. Is fixed to the inner surface of the underboard 10 by a fastener such as a staple and a vinyl acetate adhesive. A strip-shaped first board piece 17 having a width approximately twice that of the second board piece 18 is fixed to the inner surface of the first board piece 18 by a locking tool and a vinyl acetate adhesive. Half of the first board piece 17 overlaps and is integrated with the second board piece 18, and the other half of the second board piece 18 is applied to the gypsum adhesive 20 while crushing the gypsum adhesive 20 flatly. Glue. By drying and hardening the gypsum adhesive 20, the underboard 10 and the first board piece 17 are integrated. An open space 8 that is open on one side is formed between the first board piece 17 and the underboard 10, and the flattened and hardened gypsum adhesive 20 has a relatively high specific gravity scattered in the open space 8. Form an adhesive mass.

  The third board piece 19 is further fixed to the inner side surface of the underboard 10 with a locking tool and a vinyl acetate adhesive, and the reinforcing hardware 21 is fixed to the third board piece 19 with a locking tool 22 such as a screw. The The board pieces 17, 18, 19 are made of cut pieces of board building material such as gypsum board and have a thickness of about 10 to 15 mm. The reinforcing hardware 21 is made of a lightweight steel member having a width and depth of about 20 to 75 mm. As shown in FIG. 2, the lower and upper ends of the board pieces 17, 18, 19 and the reinforcing hardware 21 are positioned at a predetermined distance E from the floor F and the ceiling base C, and the distance E is in the range of 50 to 150 mm. For example, it is set to 75 mm.

A vibration-damping adhesive 11 is applied to the entire interior side surface of the underboard 10. The application amount of the damping adhesive 11 is set to 400 to 800 g / m ² , for example, 600 g / m ² . As the vibration-damping adhesive 11, an adhesive manufactured by Cemedine Co., Ltd., product number (temporary) EM850, which is a product developed by the present inventor, can be suitably used.

  The upper board 12 is attached to the indoor side surface of the lower board 10 and laminated on the lower board 10. In consideration of the curing time of the vibration-damping adhesive 11, the temporary board 12 may be temporarily fixed on the lower board 10 by using an appropriate temporary fixing means, for example, a locking tool such as a staple. The upper board 12 is made of, for example, a gypsum board having a width of 600 to 1200 mm and a thickness of 12.5 to 15 mm.

  The interior board 14 having the entire surface coated with the vinyl acetate-based adhesive 13 on the back surface is further laminated on the interior side surface of the upper board 12 together with a fastener such as a staple. The interior board 14 is fixed to the indoor side surface of the upper board 12 by a fastening force by a locking tool and an adhesive force of a vinyl acetate adhesive. For example, a gypsum board having a thickness of 9.5 mm and a width of 910 mm is used as the interior board 14, and an interior finishing material such as a cloth material or a paint is finished or painted on the interior surface of the interior board 14. If desired, a decorative plaster board or the like having an interior finish applied in advance on one side (surface) may be used as the interior plate 14.

  The wall surfaces on both sides of the partition wall W have the same configuration, but the joints of the underboard 10 on each surface are arranged at positions shifted in the direction of the wall core by a distance L2 (FIG. 3). For example, when the width of the underboard 10 is L1 = 910 mm, the joint positions of the underboard 10 on each wall surface are arranged at a predetermined interval set to L2 = about 150 to 760 mm.

  FIG. 4 is an exploded perspective view of the partition wall according to the second embodiment of the present invention.

In the partition wall W ′ shown in FIG. 4, the damping adhesive 11 is partially applied to the interior side surface of the underboard 10. As in the first embodiment, the application amount of the vibration damping adhesive 11 is set to 400 to 800 g / m ² , for example, 600 g / m ² , and the above-mentioned Cemedine Co., Ltd. is used as the vibration damping adhesive 11. An adhesive made, product number (provisional) EM850 can be preferably used.

  In this embodiment, the vibration-damping adhesive 11 is used only for the wall portion that requires a soundproofing / sound insulation effect, and in the other wall portion, the vinyl acetate adhesive 13 is used as the underboard 10. It is applied to the side of the room.

  The coating film of the vibration-damping adhesive 11 and the cured layer thereof have only a thickness equivalent to that of a conventional adhesive such as the vinyl acetate-based adhesive 13, and the wall thickness T of the partition wall W: W ′ (see FIG. 2) can be designed to have the same dimensions as conventional partition walls. Also, no special soundproofing / soundproofing means are added, or relatively expensive members or parts are not used.

However, in the partition wall W: W ′, the impact sound or vibration sound of the wall surface is reduced, and the noise generated in one chamber of the partition wall W: W ′ is difficult to propagate to the other chamber. The wall W: W ′ exhibited excellent soundproof performance and sound insulation performance.

  The inventor measured the soundproofing effect of the wall body to which the face material was bonded with the vibration-damping adhesive 11 by an inertance level measurement method. The outline of the measuring method is shown in FIG. 5, and the figure of the test body is shown in FIG.

  As shown in FIG. 5, the present inventor manufactured a partition wall test piece for measuring the inertance level, impact hammer I as a vibration source device, vibration acceleration pickup device P as a vibration receiving device, and data recorder R as a recording device. Was used to record the impact at the excitation point and the vibration acceleration at the receiving point, thereby measuring the inertance level. Generally, when a wall body shows a low inertance level, it can be evaluated that the wall body has physical properties that are difficult to transmit vibration.

  As shown in FIG. 6, the three types of test specimens manufactured as Examples 1 and 2 and Comparative Example 1 have front dimensions of width (W) = 3650 mm and height (H) = 2735 mm. The inertance level measurement is performed by applying vibration to the excitation point shown in FIG. 5 with the impact hammer I, measuring the vibration acceleration at the receiving point shown in FIG. 5 with the pickup device P, and recording the measurement result in the data recorder R. ,It was implemented.

  Examples 1 and 2 and Comparative Example 1 all have the above-described wall structure (FIGS. 1 to 4) except for the configuration of the adhesive. That is, the test body of Example 1 corresponds to the partition wall W of the first embodiment described above, and the test body of Example 2 corresponds to the partition wall W ′ of the second embodiment described above. In addition, the test body of the comparative example 1 has the structure which bonded the boards 10 and 12 using the vinyl acetate adhesive instead of the damping adhesive 10 in the partition wall structure shown in FIG.

  The structure of each part common to the wall structure of Examples 1 and 2 and Comparative Example 1 is as follows.

Wall thickness T of partition wall: 150mm
Underlay board 10: Gypsum board thickness 12.5mm, width 910mm
Upper board 12: Gypsum board 15mm thick, 910mm wide
Interior board 14: Gypsum board Thickness 9.5mm, width 910mm
Thermal insulation / sound absorbing material 5: Glass wool 25mm thickness, 24kg / m ³
Gypsum adhesive 20: 2kg / m ²
1st board piece 17: Gypsum board thickness 12.5mm, width 200mm
Second board piece 18: gypsum board thickness 12.5mm, width 100mm
Third board piece 19: gypsum board thickness 12.5mm, width 100mm
Reinforcement hardware 9: Lightweight grooved steel 25mm (width) x 25mm (depth) x 0.5mm (plate thickness)

The types and application amounts of the vibration-damping adhesives in Examples 1 and 2 are as follows.

Example 1
Type of damping adhesive 11: Adhesive manufactured by Cemedine Co., Ltd., part number (provisional) EM850
Application area of the damping adhesive 11: entire application on the interior side of the underboard 10 Application amount of the damping adhesive 11: 600 g / m ²
Adhesive 13: Vinyl acetate adhesive, entire surface application Adhesive for board pieces 17, 18, 19: Vinyl acetate adhesive, entire surface application

Example 2
Type of vibration-damping adhesive 11: Adhesive manufactured by Cemedine Co., Ltd.
Application area of the vibration-damping adhesive 11: about 1/2 of the interior side surface of the underboard 10
Application amount of vibration-damping adhesive 11: 600 g / m ²
Adhesive 13: Vinyl acetate adhesive, entire surface application Adhesive for board pieces 17, 18, 19: Vinyl acetate adhesive, entire surface application

  In the test body of Example 2, the portion where the boards 10 and 12 are bonded with the vibration damping adhesive 11 is the half of the test body on the excitation point side as shown in FIG. The boards 10 and 12 were bonded with a vinyl acetate adhesive except for a portion where the boards 10 and 12 were bonded with the vibration-damping adhesive 11.

  The wall body of Comparative Example 1 has a configuration in which the vibration damping adhesive 11 is not used at all, and the boards 10 and 12 are bonded with vinyl acetate adhesive throughout the entire test body. Therefore, the test bodies of Examples 1 and 2 and Comparative Example 1 differ only in the area of the region bonded by the vibration damping adhesive 11 or the presence or absence thereof, and are the same in other configurations.

  FIG. 7 is a diagram showing the inertance level at the excitation side receiving point (the receiving point on the wall surface on the excitation side), and FIG. 8 is at the opposite side receiving point (the receiving point on the non-excitation side wall surface). It is a diagram which shows an inertance level.

  7 and 8 show the inertance level (the average value of the inertance levels of the A to C stages) of the receiving points in the first row. The measurement results similar to those shown in FIGS. 7 and 8 were obtained for other receiving points. Illustration of the inertance levels of other receiving points is omitted.

  As shown in FIG. 7 and FIG. 8, the inertance level is lower in Example 2 in which the damping adhesive 11 is used in the half of the wall than in Comparative Example 1 in which only the vinyl acetate adhesive is used. In Example 1 using the damping adhesive 11 over the entire wall, the inertance level further decreased. That is, a solid vibration damping effect effective in reducing the impact and vibration acting on the wall surface of the partition wall was obtained by using the damping adhesive 11.

  9 to 11 show the measurement results of the sound transmission loss measurement for the test bodies of Examples 1 and 2 and the comparative example. The sound transmission loss was measured by a test method based on JIS A 1416.

  9 shows the measurement results of the test specimen of Example 1, FIG. 10 shows the measurement results of the test specimen of Example 2, and FIG. 11 shows the measurement results of the test specimen of the comparative example. It is shown.

As can be clearly understood from the comparison of the measurement results of Examples 1 and 2 and Comparative Example 1, in Examples 1 and 2 using the vibration damping adhesive 11, sound transmission loss in a frequency band of about 200 Hz or more is present. Increase significantly. This means that the adhesive layer of the vibration-damping adhesive 11 also contributes to the sound insulation of the air propagation sound.

  In particular, in the measurement results of Examples 1 and 2 and Comparative Example 1, a significant difference appears with respect to the coincidence effect in the high frequency sound range of 1600 to 4000 Hz.

  Referring to FIG. 11, the sound transmission loss curve of Comparative Example 1 shows a decrease in sound transmission loss due to the coincidence effect in the high frequency sound range of 1600 to 4000 Hz (this phenomenon is shown in the region surrounded by the phantom line). Have been). On the other hand, in the sound transmission loss curve of Example 2 shown in FIG. 10, such a decrease in sound transmission loss is eliminated, and this portion of the curve is almost leveled and appears as a curve that rises to the right. . Furthermore, in the sound transmission loss curve of Example 1 shown in FIG. 9, the value of the sound transmission loss indicated by this part of the curve increases overall. In Example 1 (FIG. 9), the sound transmission loss in the frequency range of 1600 to 4000 Hz appears as if it is relatively lowered. This is because the sound transmission loss in the frequency range of 500 to 1500 Hz is present. As a significantly increased influence, it appears only as if the sound transmission loss in the frequency range of 1600 to 4000 Hz was relatively lowered.

As a result of such a sound transmission loss test, the partition wall using the vibration-damping adhesive 11 not only exhibits a very good sound insulation performance against the air- propagating sound generated in one chamber, but also has a coincidence effect. It was confirmed that it works effectively to solve the problem.

FIG. 12 is a diagram showing a measurement result of impact sound generated when the door of the hanging cabinet is opened and closed.

The inventor attached a hanging cabinet to one side of the specimens of Example 1 and Comparative Example 1, performed door opening and closing operations, and measured the impact sound generated when the doors were opened and closed. In FIG. 12 , the sound pressure level on the sound source side is the sound pressure level measured in the indoor region on the side where the hanging cabinet is attached, and the sound pressure level on the receiving side is on the opposite side of the hanging cabinet with the wall in between. The measured sound pressure level in the indoor area. The sound pressure level is shown in FIG. 12 as an average value of values measured at a plurality of measurement points.

  In contrast to Comparative Example 1, in Example 1 using the vibration-damping adhesive 11, a significant reduction in impact sound was observed except for a part of the frequency band (frequency band near 125 Hz on the sound source side). Further, as a result of the impact sound test conducted many times, the values of the first embodiment using the vibration damping adhesive 11 are related to the noise level difference (noise level difference between the sound source side and the sound receiving side) in almost all frequency bands. Therefore, according to the partition wall of the present invention using the vibration damping adhesive 11, the soundproofing / working which effectively works against the impact sound generated in the room as described above is recognized. It was confirmed that sound insulation performance can be obtained.

From the above various test results, the partition wall W: W ′: W ″ of the present invention having a structure in which the face material is bonded by the vibration damping adhesive 11 is used for sound insulation of solid propagation sound, suppression of impact sound generation, Compared to conventional partition walls that have a structure in which face materials are bonded with vinyl acetate adhesive, they also provide superior soundproofing and sound insulation performance and eliminate the coincidence effect. Thus, it has been found that the transmission of air- borne sound between rooms can be effectively prevented.

Thus, according to the wall structure of the present invention, the coincidence effect, which is a phenomenon caused by the incidence of air- borne sound, is eliminated, thereby improving the sound insulation performance of the partition wall W: W ′: W ″ and the wall body. Insulation / sound insulation performance of partition wall W: W ': W "is an inexpensive means without changing the design of the structure, adding special sound / sound insulation means, or adopting relatively expensive members or parts. Can be improved.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiments, and various modifications or changes can be made within the scope of the present invention described in the claims. Is possible.

  For example, the vibration-damping adhesive 11 and the vinyl acetate adhesive 13 may be alternately applied onto the underboard 10 in a vertical or horizontal strip shape. When constructed in this way, the application area of the vibration-damping adhesive 11 is arranged on the indoor side surface of the underboard 10 as a vertical band or a horizontal band with a predetermined interval.

  Moreover, the various board building materials which can be used for a building or a workpiece can be used for the wall structure of the present invention. For example, as a board building material, in addition to gypsum board, calcium silicate board, flexible board, gypsum slag board, gypsum fiber board, inorganic fiber reinforced gypsum board, glass fiber reinforced gypsum board, asbestos cement board, fiber reinforced gypsum board (FG board) Various board materials such as can be used.

    INDUSTRIAL APPLICABILITY The present invention can be used to improve the soundproofing / sound insulation performance of a new or existing wall body. Examples of the structure type of the wall include a light-iron partition wall having a frame structure, a partition wall having a non-stud structure, a wooden structure wall, a reinforced concrete wall, a steel frame wall, a concrete block wall, a brick wall, and an ALC wall. The configuration of the present invention is applied to the vertical surface members constituting the wall surfaces of these wall bodies, and improves the soundproofing and sound insulation performance of the wall bodies.

It is a disassembled perspective view of the partition wall which concerns on 1st Example of this invention. It is a longitudinal cross-sectional view of the partition wall shown in FIG. It is a cross-sectional view of the partition wall shown in FIG. It is a disassembled perspective view of the partition wall which concerns on 2nd Example of this invention. It is a conceptual diagram which shows the outline | summary of an inertance level measuring method. It is a figure (front view and cross-sectional view) of a test body. It is a diagram which shows the inertance level in the vibration side receiving point (receiving point of the wall surface on the vibration side). It is a diagram which shows the inertance level in the other side receiving point (receiving point of the wall surface of a non-excitation side). It is a diagram which shows the test result of the sound transmission loss test regarding the test body of Example 1. FIG. It is a diagram which shows the test result of the sound transmission loss test regarding the test body of Example 2. FIG. 6 is a chart showing test results of a sound transmission loss test for a test body of Comparative Example 1. It is a diagram which shows the measurement result of the impact sound generated at the time of opening and closing of the door of a hanging cupboard.

Explanation of symbols

2 Floor Runner 3 Ceiling Runner 5 Heat Insulation / Sound Absorbing Material 6 Hollow Part 10 Lower Board 11 Damping Adhesive 12 Upper Board 13 Vinyl Acetate Adhesive 14 Interior Panel W Partition Wall

Claims (4)

With the board building materials to each other of the same material is thus bonded to the adhesive to form a wall, partition walls dry method of forming a portion (17,18,19,20,21) on the rear surface of the board building materials constituting the rib or weight In the partition wall structure that is a structure and generates a coincidence effect of the wall body due to noise in a high frequency range of 1600 to 4000 Hz ,
The adhesive comprises an acrylic resin emulsion, an ethylene vinyl acetate resin emulsion, NBR or SBR latex, or a mixture of a plurality of latexes. The specific gravity after curing is 0.95 to 1.2, and at least 400 after curing. % of a vibration-damping adhesive which exhibits elongation, loss factor of the composite material adhered board building materials to each other use the damping adhesive having a 0.1 or more curing properties, 1600～4000Hz A partition wall structure characterized in that the coincidence effect caused by noise in a high frequency range is suppressed by the vibration damping property of the adhesive . The partition wall structure according to claim 1, wherein an application amount of the vibration-damping adhesive is set in a range of 200 to 1000 g / m ² .   The partition wall structure according to claim 1 or 2, wherein a viscosity of the vibration-damping adhesive is set within a range of 10 to 500 Pa · s. The partition wall structure according to any one of claims 1 to 3 , wherein the elastic modulus of the vibration-damping adhesive after curing is set within a range of 2 to 100 MPa.

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