JP2007107315A - Sound insulating partition wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound insulating partition wall capable of providing excellent sound insulating performance by suppressing a coincidence effect. <P>SOLUTION: This partition wall comprises one side surface material A and the other side surface material B facing each other with an intermediate hollow layer disposed therebetween and constructed for partitioning an internal space of a building. The surface material A is formed by stacking an ordinary gypsum board and a high density gypsum board heavier than the ordinary gypsum board. The surface material B is formed of a single layer of high density gypsum board. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sound insulation partition wall that is formed as a partition of an interior space of a building such as a house, a store, or an office building, and particularly excellent in sound insulation performance.

  In order to protect the privacy and improve the environment of living spaces, the sound insulation performance of the partition walls has become increasingly important in recent years. However, due to the need to plan the interior space of the building, the wall thickness of the partition constructed is limited. Moreover, it is difficult to adopt a heavy structure such as a concrete wall due to constraints on design, structure, cost, etc., and most of them use a so-called flash structure in which boards are stretched on both sides of a core material such as a stud. It has been. Thus, many proposals have been made on how to effectively block sound within such a limited thickness and structure range.

  For example, there is a method of absorbing sound energy by filling the interior space of the partition wall with a porous sound absorbing material such as glass wool, rock wool, sponge, etc. However, since the wall thickness is not sufficient as described above, the filling amount is reduced. There is a limit, and these sound-absorbing materials are effective for middle and high sounds, but are not effective for deep bass, and there is a problem that even if the sound-absorbing material is increased, the bass cannot be cut off.

  In addition, various sound insulation sheets have been developed, such as mixing iron powder into a base layer such as PVC or asphalt, or laminating these base layers and a lead sheet, and further covering a reinforcing nonwoven fabric. Used over the entire surface of the wall base plate. Although there are certain effects such as sealing the gaps between the wall base plates, the sound insulation effect is limited.

  Therefore, many proposals have been made to improve the sound insulation performance of gypsum boards often used for partition walls. For example, there is a gypsum board whose performance has been improved by blending about 3 to 30 parts by weight of wollastonite, which is a natural mineral of acicular crystals used as a reinforcing material for cement / calcal board building materials. And it has been shown that the wollastonite having an average crystal length of 40 μm or more and an average aspect ratio of 5 or more exhibits particularly excellent sound insulation performance (see, for example, Patent Document 1).

Further, instead of the wollastonite, a fixed amount of tuff grains or powder is added to improve water absorption performance, moisture absorption performance and fire resistance performance, and a gypsum board with improved sound insulation and sound absorption (for example, see Patent Document 2) Or a gypsum board in which stainless steel fine wires having a wire diameter of 5 to 30 μm, a length of 3 to 30 mm, and a volume ratio after molding of 1.0 × 10 ^{−6 to} 1.0 × 10 ⁻³ are dispersed and mixed (for example, And Patent Document 3) have been proposed.

  In addition to the addition of a reinforcing material in the gypsum raw material, a coated gypsum board that covers both sides of the molded board with a thin metal plate having a thickness of about 30 to 100 μm to improve the sound insulation performance has been proposed (for example, Patent Documents). 4).

JP-A-10-96279 Tomi-3029229 JP 2000-183367 A JP 2001-245291 A

  However, many materials such as gypsum board have a frequency at which vibration is likely to occur, and when sound having the same frequency as that frequency is incident on the material, resonance occurs and the sound insulation performance decreases at that frequency. This phenomenon is called the coincidence effect, and the frequency at which the coincidence effect occurs is defined as the coincidence frequency. The coincidence frequency of the gypsum board varies depending on the thickness and type of the board, but generally exists in the range of 1600 Hz to 5000 Hz, and this range falls within the frequency range of the sound insulation performance required by the partition wall. As a result, as shown in FIG. 8, even if gypsum boards b and b having improved sound insulation performance are fixed to both sides of the intermediary column a to form an intermediary wall, it is required for the interim wall due to the influence of the coincidence effect. There is a problem that sufficient sound insulation performance cannot be obtained.

  The present invention is basically formed by laminating a normal gypsum board and a high-density gypsum board heavier than this normal gypsum board, and has excellent sound blocking performance by suppressing the coincidence effect. The challenge is to provide a sound-insulating partition wall.

  In order to achieve the above-mentioned object, the invention according to claim 1 has an A-side material on one side and a B-side material on the other side facing each other with an intermediate hollow layer interposed therebetween, and partitions the internal space of the building The A-side material is formed by laminating a normal gypsum board and a high specific gravity gypsum board heavier than this normal gypsum board, and the B-side material is It is formed by a single layer of specific gravity gypsum board.

  In the invention according to claim 2, a hard gypsum board having a specific gravity exceeding 1.1 and a thickness of 7 to 20 mm is used as the high specific gravity gypsum board, and the high specific gravity gypsum board according to the invention according to claim 3 is In the invention according to claim 4, the high specific gravity gypsum board constituting the A face material is a high-strength material that forms the B face material. It is characterized by using a plate material of the same quality and thickness as the specific gravity gypsum board.

  Since the invention according to claim 1 uses a high-specific gravity gypsum board in which both the A-side material and the B-side material 4 facing each other across the hollow layer are used, the total weight of the partition walls is increased and the sound insulation performance is improved. Moreover, the normal gypsum board laminated with the high specific gravity gypsum board in the A side material has a low specific gravity, so its sound insulation performance is poor, but the coincidence frequency is different from the high specific gravity gypsum board, so the A side is synthesized as a laminate. The coincidence frequency of the material is deviated from the coincidence frequency of the B-side material of the high specific gravity gypsum board alone. As a result, since the deterioration of the sound insulation performance due to the coincidence effect of the entire partition wall is suppressed, a large transmission loss can be obtained while suppressing the overall wall thickness and weight, and a high-level sound insulation partition wall can be constructed.

  Although the hard gypsum board used in the invention according to claim 2 has an excellent sound insulation performance, the coincidence effect appears remarkably in the vicinity of a frequency of 1500 to 4000 Hz, and the sound insulation performance is limited. However, since the influence by the coincidence effect is greatly suppressed by laminating with the normal gypsum board in the face A material, excellent sound insulation performance can be obtained as a whole partition wall.

  Further, in the invention according to claim 3, the reinforced gypsum board to which a reinforcing material such as glass fiber is added exhibits a high fireproof performance as well as a sound insulation performance, and therefore can be suitably used as a fireproof partition wall for houses, schools, buildings, and the like. In addition, it is possible to construct a partition wall with excellent sound insulation performance by reducing the coincidence effect by lamination with ordinary gypsum board.

  In the invention according to claim 4, since the same specific gravity gypsum board is used for both the A-side material and the B-side material, the coincidence frequency can be adjusted by laminating ordinary gypsum board based on the coincidence frequency. And the kind of building material which comprises a partition wall can be reduced, and workability can be improved.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the sound insulation partition wall 1 is arranged in an internal space of a building according to a plan plan, and divides this space, and faces one side with an intermediate hollow layer 2 interposed therebetween. A face material 3 and the other B face material 4 are provided. Further, in this embodiment, the A face material 3 and the B face material 4 are respectively attached to both sides of the lightweight steel base 23 fixed between the floor 21 and the ceiling 22.

  As shown in FIG. 3, the lightweight steel base 23 includes a runner 24 formed by bending a plated steel sheet having a thickness of about 0.5 to 1.2 mm into a U-shaped cross section, And L-shaped studs 25 (in this embodiment, B-shaped). The runner 24 is fixed to the floor 21 and the ceiling 22 in an inward posture. Further, the upper and lower ends of the stud 25 are fitted in the groove of the runner 24 and are vertically attached between the runners 24 and 24. Further, if necessary, a reinforcing material is bridged between the runners 24, 24, and a lightweight steel base 23 that forms the framework of the partition wall is formed. The lightweight steel base 23 is preferable in terms of excellent fire resistance and good workability. However, the present invention is not limited to this, and a wood substrate may be used.

The A face material 3 is attached to one side of the lightweight steel base 23 and is configured by laminating a normal gypsum board 5 and a high specific gravity gypsum board 6. Normal gypsum board 5 is formed by adding water to half-water gypsum and sandwiching it into base paper for board, and a large number of boards with standard thicknesses of 9.5mm, 12.5mm, 15mm, etc. are produced. The The ordinary gypsum board 5 is relatively light with a specific gravity of about 0.6 to 0.7, and has a Young's modulus of about 1.5 to 3.5 × 10 ⁹ .

  On the other hand, the high specific gravity gypsum board 6 is formed to have a higher specific gravity than the normal gypsum board 5. From the mass rule that the transmission loss increases as the sound insulation material becomes heavier and thicker, the high specific gravity gypsum board 6 has higher sound insulation performance than the normal gypsum board 5.

  In this embodiment, a hard gypsum board 6H is used as the high specific gravity gypsum board 6. The hard gypsum board 6H is formed to be super-hard by adding glass fiber, an inorganic material or the like to the board core. Compared to ordinary gypsum board 5, the surface hardness is about 4 times higher, and the specific gravity is higher than 1.1. Therefore, it has excellent sound insulation performance and about twice the bending fracture load. The rate is about 1/3 and has excellent strength performance and waterproof performance. The thickness of the hard gypsum board 6H is, for example, about 7.0 to 20 mm, preferably 9.5 to 15 mm. If the thickness is less than 7.0, the sound insulation performance cannot be obtained sufficiently due to insufficient thickness. Conversely, if the thickness exceeds 20 mm, the weight becomes too heavy and the construction efficiency is lowered and the design allowable thickness of the partition wall can be exceeded. There is sex. As the hard plaster board 6H, “Tiger Super Hard” (registered trademark) manufactured by Yoshino Gypsum Co., Ltd., “Toughy Board” (registered trademark) manufactured by Chiyodaute Co., Ltd., or the like can be used.

  As shown in FIG. 2, the A-face material 3 composed of the two types of boards, as shown in FIG. 2, fixes a hard gypsum board 6 </ b> H having a seam arranged on the stud 25 to a lightweight steel base 23 using a board screw 26, and The normal gypsum board 5 is attached to the inside of the hard gypsum board 6H using an adhesive such as vinyl acetate woodworking bond and laminated. At this time, since the ordinary gypsum board 5 having substantially the same width as the inner dimension interval of the studs 25, 25 is used, the studs 25 are attached in a state where no gap is generated. Further, the inner surfaces of both sides of the normal gypsum board 5 are sandwiched between the board pressing member 27 fixed to the stud 25 and the hard gypsum board 6H, and bonded to the board pressing member 27 using a sealant. Thereby, the normal gypsum board 5 is firmly laminated with the hard gypsum board 6H and is also integrated with the lightweight steel base 23.

  A high specific gravity gypsum board 6 heavier than the normal gypsum board 5 is also used for the B-side material 4, and this embodiment exemplifies a case where the B-side material 4 is configured using a hard gypsum board 6 H as with the A-side material 3. The hard gypsum board 6H constituting the B-side material 4 is also fixed to the opposite surface of the stud 25 using a board screw 26. In this embodiment, glass wool 30 is inserted into the hollow layer 2 between the B face material 4 and the A face material 3.

  Thus, since the sound insulation partition wall 1 of this form contains the heavy hard gypsum board 6H in both A surface material and B surface material and total weight increases, it has high sound insulation performance by a mass rule. In addition, since the hard plaster board 6H of the A face material is laminated and integrated with the ordinary plaster board 5 having a coincidence frequency different from that of the hard plaster board 6H, the coincidence frequency of the A face material synthesized as a laminate is equal to the hard plaster board 6H. Deviation occurs between the coincidence frequencies of the single B-side material. That is, although the hard gypsum board 6H has excellent sound insulation performance as described above, the coincidence effect is noticeable in the vicinity of a frequency of 1500 to 4000 Hz, and the sound insulation performance is limited when used alone. However, since the influence of the coincidence effect is greatly suppressed by being laminated with the normal plaster board 5 in the A-side material, a large transmission loss can be obtained while suppressing the overall wall thickness and weight, and a high level of sound insulation. Partition walls can be constructed.

  Moreover, in this form, it comprises using the hard gypsum board 6H of the same quality and the same thickness for A surface material and B surface material. Therefore, it is possible to simulate the coincidence frequency on the side of the A face material on which the normal gypsum board 5 is laminated based on the coincidence frequency of the same value, and the adjustment operation becomes easy. In addition, since the types of building materials constituting the partition walls are reduced, the workability can be improved, the integrating work and the building material management can be facilitated, and troubles of unsent and mis-sent can be reduced.

  In another embodiment, a reinforced gypsum board 6S can be used for the high specific gravity gypsum board 6. Only the contents different from the above will be described below. This reinforced gypsum board 6S is a board in which fire resistance is enhanced by adding glass fiber or the like, and is a gypsum board having excellent sound insulation performance.

  The thickness of the reinforced gypsum board 6S is, for example, about 7.0 to 20 mm, preferably 9.5 to 15 mm. If the thickness is less than 7.0, the sound insulation performance cannot be obtained sufficiently due to insufficient thickness. Conversely, if the thickness exceeds 20 mm, the weight becomes too heavy and the construction efficiency is lowered and the design allowable thickness of the partition wall can be exceeded. There is sex. As the hard plaster board 6H, “Tiger Board Type Z” (registered trademark) manufactured by Yoshino Gypsum Co., Ltd., “General-purpose reinforced gypsum board” manufactured by Chiyodaute Co., Ltd. and the like can be used.

  When the reinforced gypsum board is used, it exhibits high fireproof performance as well as sound insulation performance, and thus can be suitably used as a fireproof partition wall for houses, schools, buildings, and the like. In addition, it is possible to construct a partition wall with excellent sound insulation performance by reducing the coincidence effect by lamination with ordinary gypsum board.

  When constructing the sound insulation partition wall 1, first, as shown in FIG. 3 and FIG. 7 (A), a board screw 26 having a diameter of 4 mm and a length of about 28 mm is driven at intervals of about 250 mm, whereby the high specific gravity gypsum board 6 is formed. It is fixed on the lightweight steel base 23. At this time, the high specific gravity gypsum board 6 is arranged so that the seam thereof coincides with the stud 25.

  Next, as shown in FIG. 4 and FIG. 7 (B), the ordinary gypsum board 5 is laminated and integrated on the inner surface of the high specific gravity gypsum board 6 fixed to the lightweight steel base 23 using an adhesive such as vinyl acetate woodwork bond. Turn into. At this time, it is important to apply the adhesive evenly over the peripheral edge of the high specific gravity gypsum board 6 and the inside thereof.

  Next, as shown in FIGS. 5 and 7C, a wooden square bar-shaped board pressing member 27 having a cross section of about 30 mm × 24 mm is fixed to the side surface of the stud 25 using a flat head nail 28 having a length of 45 mm. The peripheral portion of the normal gypsum board 5 is sandwiched between the high specific gravity gypsum board 6 and the board pressing member 27. At this time, a sealant 29 is applied to the board pressing member 27 and adhered to the peripheral edge of the ordinary gypsum board 5. As a result, the normal gypsum board 5 is firmly bonded to the hard gypsum board 6H and is integrated with the lightweight steel base 23 to form the A face material 3 in a laminated manner.

  Next, as shown in FIG. 6 and FIG. 7 (D), the high specific gravity gypsum board 6 constituting the B-face material 4 is fixed to the opposite surface of the stud 25 using a board screw 26. At this time, glass wool 30 having a thickness of 25 mm is inserted between the A face material 3 and the B face material 4.

The sound insulation performance of Examples 1 to 5 in which various combinations of gypsum boards as shown in Table 1 were stretched as the A-side material and the B-side material on the partition wall with a lightweight steel base height of 2500 mm was simulated. . The simulation method is as follows.
(1) The primary resonance frequency (fr) when the intermediate double wall is regarded as a one-mass system spring-mass system is obtained from the surface weight of the face material constituting the intermediate double wall and the air layer thickness.
(2) The value calculated from the mass law of the one mass system is calculated at a frequency 1.4 times the frequency of fr.
(3) With respect to this value, sound insulation for each frequency is determined by a curve having a slope of 9 dB / oct.
(4) Correction is performed to lower the 11 dB sound insulation at the coincidence frequency.
And the sound insulation grade D value which is an evaluation standard of sound insulation performance was calculated | required, D value 35 was set as a performance target level, and pass / fail was determined.

Conventional example

  As shown in Table 2, in the same partition walls as in the examples, the same evaluation was performed on the conventional examples 1 to 6 provided with the A-side material and the B-side material composed of a single layer of gypsum board. As a result, in Examples 4 and 6 in which high-specific gravity gypsum boards were used for both the A-side material and the B-side material, the sound insulation grade D value was 30, and it was found that the coincidence effect appeared remarkably.

Comparative example

  As shown in Table 3, the same evaluation was performed on Comparative Examples 1 to 16 in which the A-side material on which the gypsum board was laminated and the single-sided B-side material were provided on the partition walls similar to the examples. In Comparative Examples 2, 4, and 10 using a laminate of ordinary gypsum board, it can be seen that even if a hard gypsum board having a different coincidence frequency is used, the standard cannot be satisfied due to insufficient sound insulation performance of the ordinary gypsum board itself. Moreover, in Comparative Examples 5-8, although the laminated body of the hard gypsum board was used for A surface material, since it was the laminated body of the same board, it became clear that sound insulation performance was insufficient by the coincidence effect.

  The above description is an example of the embodiment of the present invention. Therefore, the technical scope of the present invention is not limited to this, and various modifications are included in addition to the above-described embodiment.

It is a perspective view which illustrates one embodiment of the present invention. It is the XX sectional view. It is a schematic perspective view explaining a construction procedure sequentially. It is a schematic perspective view explaining a construction procedure sequentially. It is a schematic perspective view explaining a construction procedure sequentially. It is a schematic perspective view explaining a construction procedure sequentially. (A)-(D) are sectional drawings which explain a construction procedure sequentially. It is sectional drawing of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sound insulation partition wall 2 Hollow layer 3 A surface material 4 B surface material 5 Normal gypsum board 6 High specific gravity gypsum board 6H Hard gypsum board 6S Reinforced gypsum board

Claims (4)

A partition wall that has an A-side material on one side and a B-side material on the other side facing each other across an intermediate hollow layer, and is constructed to partition the internal space of the building,
The A-side material is formed by laminating a normal gypsum board and a high specific gravity gypsum board heavier than the normal gypsum board,
The sound insulation partition wall, wherein the B-side material is formed of a single layer of the high specific gravity gypsum board.   The sound insulating partition wall according to claim 1, wherein the high specific gravity gypsum board is configured by using a hard gypsum board having a specific gravity exceeding 1.1 and a thickness of 7 to 20 mm.   The sound-insulating partition wall according to claim 1, wherein the high specific gravity gypsum board is made of fiber-reinforced reinforced gypsum board having a thickness of 7 to 20 mm.   The high specific gravity gypsum board that constitutes the A-side material is constituted by using a plate material that is the same and has the same thickness as the high-specific gravity gypsum board that forms the B-side material. Sound insulation partition wall as described.

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