JP2017190575A - Sound insulation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound insulation method capable of improving a sound insulation performance between upper and lower floors without enlarging an external diameter of a mullion.SOLUTION: A sound insulation method improves a sound insulation performance of a curtain wall 1 by post-construction. The sound insulation method comprises: a step S2 to form open holes 50A, 50B at predetermined positions of a mullion 20 of the curtain wall 1; a step S3 to prepare a corbel 51 capable of elastically deforming and block the inside of the mullion 20 at a position lower than the open hole 50A by the corbel 51 by inserting the corbel 51 from the open hole 50A into the mullion 20; and a step S4 to block the inside of the mullion 20 by injecting urethane foam 52 from the open hole 50A.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a sound insulation method for improving the sound insulation performance of a hollow shape of a curtain wall in post-construction.

  Conventionally, in a building in which an aluminum wall (hereinafter referred to as ACW) is adopted as an outer wall surface, a sound having a specific frequency may be transmitted between upper and lower floors. For example, a normal conversation is hardly transmitted, but a voice through a microphone or a sound of applause may be transmitted.

  Therefore, the present inventors installed a sound source on the upper floor and a sound measuring device on the lower floor, and attached a vibration measuring device on the ACW glass and the vertical, and measured the frequency of the sound generated by the sound source on the lower floor. The correlation between the measured sound pressure level, the ACW glass surface and the vertical frequency was investigated. As a result, the following facts were found.

1. The frequency band of applause is between 1 kHz and 2 kHz.
2. Regardless of the situation of interlayer blocking between the upper and lower floors, the sound pressure level becomes high at a frequency near 2 kHz. Further, at a frequency of about 2 kHz, the ACW glass surface hardly vibrates, but the direction is greatly vibrated.

  From the above, since the ACW stand is the sound propagation path, a method of enhancing the sound insulation performance between the upper and lower floors by placing a sheet or board having a high sound insulation performance around the stand is considered ( For example, see Patent Document 1).

JP 2010-13847 A

  However, if the vertical is surrounded by a sheet or board with high sound insulation performance, the outer diameter of the vertical becomes large, which causes a problem in terms of design and a restriction in the usage form of the indoor space. .

  An object of this invention is to provide the sound-insulation method which can improve the sound-insulation performance between the upper and lower floors, without enlarging the outer diameter of a vertical.

  The sound insulation method according to claim 1 is a sound insulation method for improving the sound insulation performance of a curtain wall (for example, curtain wall 1, 1A, which will be described later) having a hollow shape (for example, a later-described vertical 20) in post-construction. A method of forming a through hole (for example, through holes 50A and 50B described later) that communicates the inside and outside of the vertical at a predetermined portion of the vertical (for example, steps S2 and S12 described later). And an elastically deformable receiving material (for example, receiving material 51 to be described later), the receiving material is inserted into the vertical from the through hole, and the receiving material is below the through hole. A step of closing the inside of the vertical at the height position (for example, steps S3 and S13 described later), and injecting urethane foam (for example, urethane foam 52 described later) from the through hole, The process of closing the inside ( Eg to characterized in that it comprises a step S4, S14) which will be described later.

  According to this invention, since the interior of the vertical is closed with urethane foam, the sound insulation performance is prevented by preventing the sound from passing between the upper and lower floors through the vertical without increasing the outer diameter of the vertical. Can be improved. In addition, since it is only necessary to inject urethane foam into the vertical interior, construction is possible at low cost.

  In the sound insulation method according to claim 2, in the step of forming the through hole, in addition to the through hole, a second through hole (for example, a through hole 50B described later) is formed above the through hole, After the step of injecting the urethane foam, a step of injecting a grout material (for example, a grout material 53 described later) from the second through hole and filling the urethane foam onto the urethane foam (for example, step S5 described later). Is further provided.

  According to this invention, since the interior of the vertical is closed with the grout material, it is possible to more reliably prevent sound from passing between the upper and lower floors through the interior of the vertical. Moreover, since it is only necessary to inject the grout material into the vertical, it can be constructed at low cost.

  According to the present invention, it is possible to improve the sound insulation performance between the upper and lower floors without increasing the vertical outer diameter.

It is a longitudinal cross-sectional view of the building used as the application object of the sound insulation construction method which concerns on 1st Embodiment of this invention. It is AA sectional drawing of FIG. It is a flowchart which shows the procedure of the sound insulation construction method which concerns on the said embodiment. It is explanatory drawing (the 1) of the procedure of the sound insulation construction method which concerns on the said embodiment. It is explanatory drawing (the 2) of the procedure of the sound insulation construction method which concerns on the said embodiment. It is a flowchart which shows the procedure of the sound insulation construction method which concerns on 2nd Embodiment of this invention. It is explanatory drawing of the procedure of the sound insulation construction method which concerns on the said embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.
[First Embodiment]
FIG. 1 is a longitudinal sectional view of a building 10 including a curtain wall 1 to which a sound insulation method according to a first embodiment of the present invention is applied. FIG. 2 is a cross-sectional view taken along the line AA of FIG.
The curtain wall 1 constitutes the outer wall surface of the building 10 and is supported by brackets and fasteners (not shown) provided on the floor slab 12 of each floor 11 of the building 10.
The curtain wall 1 is arranged in the horizontal direction at predetermined intervals and extending in the vertical direction. The curtain wall 1 is arranged between the vertical 20 in the vertical direction at predetermined intervals and extending in the horizontal direction. A rectangular glass panel 23 fitted into an opening 22 surrounded by the vertical 20 and the mesh 21.

The vertical 20 and the mesh 21 are made of metal, and are integrally formed by aluminum extrusion or the like (continuously formed with the same cross-sectional shape in the longitudinal direction). The vertical 20 and the mesh 21 include a hollow cylindrical main body 30 and a substantially H-shaped attachment portion 31 provided on the outdoor side of the main body 30.
Concave grooves 32 are provided on both side surfaces of the attachment portion 31, and the four sides of the glass panel 23 are inserted into the concave grooves 32. After a backup material is inserted into the gap between the concave groove 32 and the glass panel 23, a sealing material is placed thereon, whereby the glass panel 23 is held on the vertical 20 and the mesh 21.

  Each floor 11 has a double floor structure, and an OA floor 13 is provided on the floor slab 12. The OA floor 13 includes struts (not shown) disposed on the floor slab 12 at predetermined intervals, and rectangular floor panels 14 supported on the struts.

A metal plate-like fireproof board receiver 40 is attached to the blank 21 along the edge of the floor slab 12, and a fireproof board 41, which is a fireproof material, is attached to the fireproof board receiver 40. Yes. A gap between the inner wall surface of the fireproof board 41 and the end surface of the floor slab 12 is closed with rock wool 42 that is a fireproof material.
The blind 21 is provided with a roof plate 15 that hides the fireproof board receiver 40 and the fireproof board 41, and the end portion of the floor panel 14 of the OA floor 13 extends to the end portion of the flange plate 15.

In the present invention, the sound insulation work for improving the sound insulation performance of the curtain wall 1 is performed by post-construction after the building 10 is completed. Hereinafter, the procedure of the sound insulation work will be described with reference to the flowchart of FIG.
In step S1, as shown in FIG. 4 and FIG. 5, the construction site where the sound insulation work is performed is exposed as a preparation work. Specifically, the floor panel 14 that contacts the roof plate 15 is removed, and then the roof plate 15 is removed to expose a portion of the vertical 20 near the floor slab 12.

In step S2, as shown in FIGS. 4 and 5, through holes 50A and 50B are formed in two places above and below the vertical 20 so as to communicate the inside of the vertical 20 with the outside.
Specifically, a through hole 50A is opened with a drill on the side surface of the vertical 20 on the floor slab 12 side. Moreover, the through-hole 50B is opened with a drill in the upper side of the fireproof board receiver 40 and the lower side of the cover 15 among the side surfaces of the vertical 20 on the fireproof board receiver 40 side. The height position of the through hole 50B is set higher than the height position of the through hole 50A.

  In step S3, as shown in FIGS. 4 and 5, an elastically deformable resin receiving material 51 is prepared, and the receiving material 51 is rolled and inserted into the vertical 20 from the lower through-hole 50A. Then, it is restored and expanded after insertion, and the receiving member 51 closes the inside of the vertical 20 at a height position below the through hole 50A.

In step S4, as shown in FIG. 4 and FIG. 5, the urethane foam 52 is injected into the vertical 20 from the lower through-hole 50A to close the inside of the vertical 20. The height position of the upper end of the urethane foam 52 is set lower than the upper through hole 50B. The filled foamed urethane 52 is supported from below by the receiving material 51 until foamed and cured.
At this time, the operator inserts the fiberscope from the through hole 50B and confirms that the urethane foam 52 is filled in the vertical 20 without a gap. If there is a gap between the foamed urethane 52 and the inside of the vertical 20, a spatula is inserted from the through hole 50 </ b> A or the through hole 50 </ b> B, and the foamed urethane 52 is brought close by this spatula to close the gap.

In step S5, as shown in FIGS. 4 and 5, the grout material 53 is injected into the vertical 20 from the upper through-hole 50B, and filled inside the vertical 20 and onto the urethane foam 52. The filled grout material 53 is supported from below by the urethane foam 52 until it is cured.
In step S6, the construction site where the sound insulation work has been performed is concealed. Specifically, the roof plate 15 and the floor panel 14 are restored to cover the through holes 50 </ b> A and 50 </ b> B provided in the vertical 20.

According to this embodiment, there are the following effects.
(1) Since the inside of the vertical 20 is closed with the urethane foam 52, it is possible to prevent the sound from passing between the upper and lower floors through the inside of the vertical 20 without increasing the outer diameter of the vertical 20, Sound insulation performance can be improved. Moreover, since it is only necessary to inject the urethane foam 52 into the vertical 20, construction is possible at a low cost.

  (2) Since the inside of the vertical 20 is closed by the grout material 53, it is possible to prevent the sound from passing between the upper and lower floors through the inside of the vertical 20 more reliably. Moreover, since it is only necessary to inject the grout material 53 into the vertical 20, construction can be performed at low cost.

[Second Embodiment]
FIG. 5 is a schematic perspective view of a curtain wall 1A to which the sound insulation method according to the second embodiment of the present invention is applied.
In the present embodiment, as viewed from the indoor side, the pillar 16 is located on the front side, that is, the inner side of the vertical 20 (see FIG. 7), and the through hole 50A of the first embodiment cannot be formed. Different from form.
Hereinafter, the procedure for improving the sound insulation performance of the curtain wall 1A in the post-construction will be described with reference to the flowchart of FIG.
Step S11 is the same as step S1 of the first embodiment.
In step S12, as shown in FIG. 7, the through-hole 50B is provided in the side face of the vertical 20 on the side of the side 21.

  In step S13, as shown in FIG. 7, an elastically deformable receiving material 51 is prepared, and the receiving material 51 is rounded and inserted into the vertical 20 from the through hole 50B, and restored and expanded after insertion, The receiving member 51 closes the interior of the vertical 20 at a height position below the through hole 50B.

In step S <b> 14, as shown in FIG. 7, urethane foam 52 is injected from the through hole 50 </ b> B and filled into the vertical 20.
Step S15 is the same as step S6 of the first embodiment.

  According to the present embodiment, there is an effect similar to the above (1).

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

DESCRIPTION OF SYMBOLS 1, 1A ... Curtain wall 10 ... Building 11 ... Each floor 12 ... Floor slab 13 ... OA floor 14 ... Floor panel 15 ... Perforated board 16 ... Pillar 20 ... Standing 21 ... Seamless 22 ... Opening 23 ... Glass panel 30 ... Body 31 ... Mounting portion 32 ... Ditch 40 ... Fireproof board receiver 41 ... Fireproof board 42 ... Rock wool 50A ... Through hole 50B ... Through hole 51 ... Receiver material 52 ... Polyurethane urethane 53 ... Grout material

Claims (2)

It is a sound insulation method that improves the sound insulation performance of curtain walls with a hollow shape in the post-construction,
A step of forming a through-hole communicating with the inside and the outside of the vertical at a predetermined position of the vertical;
An elastically deformable receiving material is prepared, and the receiving material is inserted into the vertical from the through hole, and the internal of the vertical is lowered by the receiving material at a lower position than the through hole. A blockage step;
And a step of injecting urethane foam from the through-hole to close the inside of the vertical body. In the step of forming the through hole, in addition to the through hole, a second through hole is formed above the through hole,
The sound insulation method according to claim 1, further comprising a step of injecting a grout material from the second through hole and filling the urethane foam after the step of injecting the urethane foam.

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