JP2010237386A - Sound absorber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound absorber which reduces a cleaning work load and effectively uses an acoustic material. <P>SOLUTION: The sound absorber 10 includes: the acoustic material 1 with sound absorbing characteristics, which stretches to a predetermined axis direction; a covering material 2 for covering an outer side face which stretches to the predetermined axis direction of the acoustic material 1; and a pair of side lids 4a and 4b, respectively provided on both edge faces which stretch to a crossing direction of the predetermined axis direction of the acoustic material 1. A connection 3 by which the covering material 2 is freely removable from the acoustic material 1, is provided in the covering material 2. Thereby, comparing with the case that a sound absorber which is degraded over time is replaced with a new one, the cleaning work load is reduced. The sound absorbing can be continuously used by replacing the covering material 2, thereby the acoustic material 1 is effectively used. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sound absorber.

  Conventionally, in order to reduce reverberation in a movie theater, a concert hall, a station, an airport, or the like, a sound absorbing material is embedded in a wall surface or ceiling, and the sound absorbing material is used as an interior material or a base material. Moreover, a sound absorber is suspended from the ceiling to adjust the echo effect (see, for example, Patent Document 1).

JP 2006-219932 A

  In the suspension type sound absorber described in Patent Document 1, the surface area facing the indoor space per unit volume of the sound absorber is larger than that of a sound absorber that is embedded in a wall surface or ceiling. For this reason, the suspension type sound absorber is relatively rapidly deteriorated in the foamed resin molded body and the inorganic fiber molded body constituting the sound absorber, and dust tends to accumulate in the sound absorber.

  Therefore, in the sound absorbing system described in Patent Document 1, a sound absorbing body installation rail is attached to the ceiling surface, and a structure in which the sound absorbing body is suspended from the ceiling via a locking member is employed to replace the sound absorbing body. . In the sound absorbing system described in Patent Document 1, it may be necessary to replace a sound absorber that has deteriorated over time with a new sound absorber. However, depending on the arrangement of the sound absorber, replacement is difficult, and the burden of cleaning work is large. Further, the removed sound absorber itself has become waste.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the sound-absorbing body which can use a sound-absorbing material effectively while reducing the burden of cleaning work.

  In order to solve the above-described problems, a sound absorber of the present invention includes a sound-absorbing material that extends in a predetermined axial direction and has sound-absorbing properties, a covering material that covers an outer surface extending in the predetermined axial direction of the sound-absorbing material, And a pair of side lids respectively provided on both end faces extending in a direction intersecting the direction, and the covering material is provided with a connecting portion for making the covering material detachable from the sound absorbing material. And

  In the sound absorber of the present invention, since the covering material is provided so as to cover the outer surface of the sound absorbing material, dirt such as dirt and dust adheres to the covering material. It is possible to make the covering material detachable from the sound-absorbing material through the connection part, so the sound-absorbing body can be easily cleaned by removing the covering material that needs to be replaced and attaching a new covering material to the sound-absorbing material. It can be carried out. Therefore, the burden of the cleaning work can be reduced as compared with the case where the sound absorber itself is replaced with a new sound absorber. Further, by replacing the dirty covering material with a new covering material, it is not necessary to replace the sound absorbing material that can be continuously used, and the sound absorbing material can be used effectively.

  The sound absorbing material is preferably cylindrical or columnar. When the sound absorbing material is cylindrical or columnar, uniformity in the sound absorbing direction is improved.

  Moreover, it is preferable that a connection part is a fastener. Thereby, even if it is a case where the sound absorption body is attached to the place where cleaning work is difficult, such as a ceiling, the exchange work of covering material can be made easy.

  Moreover, it is preferable that a pair of side cover comprises the cap structure which has an annular rib, and the both ends of the sound-absorbing material covered with the coating | covering material are engage | inserted with respect to a pair of side cover. The sound absorbing material and the covering material can be firmly fixed by the pair of side covers having such a cap structure.

  Further, it is preferable that the sound absorbing material further includes a rod-shaped material extending in a predetermined axial direction, and the sound absorbing material is fixed between the pair of side lids by fixing the pair of side lids to the rod-shaped material. . Thereby, the sound absorbing material can be firmly fixed. Further, since the rod-shaped material is inside the sound-absorbing material, the influence on the sound-absorbing characteristics is less than when the rod-shaped material is provided outside the sound-absorbing material.

  ADVANTAGE OF THE INVENTION According to this invention, while reducing the burden of cleaning work, the sound absorber which can use a sound-absorbing material effectively can be provided.

It is a perspective view which shows the sound absorber which concerns on embodiment. It is sectional drawing along the II-II line in FIG. It is a perspective view which shows the state which the coating | covering material has coat | covered the sound-absorbing material. It is a figure which shows the example which attached the sound-absorbing body which concerns on embodiment to room | chamber interior. It is a perspective view which shows the state which provided the intermediate material between the sound-absorbing material and the coating | covering material. It is a graph which shows the frequency dependence of the sound absorption rate by the presence or absence of an intermediate material.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a perspective view showing a sound absorber 10 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a perspective view showing a state in which the covering material 2 covers the sound absorbing material 1. The sound absorber 10 includes a sound absorbing material 1 having sound absorbing properties, a covering material 2 that covers the outer surface of the sound absorbing material 1, and a connecting portion 3 that is provided on the covering material 2 and that allows the covering material 2 to be detachable from the sound absorbing material 1. And a pair of side lids 4a and 4b provided on both end faces of the sound-absorbing material 1.

  The sound absorbing material 1 has a cylindrical shape having a hollow portion 9 and extends in the axis X direction. For the sound absorbing material 1, a material that absorbs sound such as reverberation is used, and for example, inorganic fibers such as glass wool and rock wool, resin foam, and the like can be used. The thickness T1 of the sound absorbing material 1 is appropriately adjusted depending on the noise level of the sound source, and can be set to, for example, 10 mm to 200 mm.

  The covering material 2 extends in the axis X direction and covers the outer surface of the sound absorbing material. The covering material 2 can cover the sound absorbing material 1 by a method of wrapping around the sound absorbing material 1. For the covering material 2, a material having a function of suppressing deterioration of the sound absorbing material 1 is used. For example, a sheet, a film such as a resin film, a cloth such as cotton, a glass cloth, or the like can be used. Moreover, it is preferable that the coating | covering material 2 has air permeability and nonflammability. The thickness T2 of the covering material 2 is appropriately adjusted from the viewpoint of the sound absorption performance and weight limit of the sound absorber 10, and can be set to, for example, 0.05 mm to 10 mm.

  As shown in FIG.1 and FIG.3, the connection part 3 of this embodiment is a wire fastener. The covering material 2 can be freely detached from the sound absorbing material 1 by opening and closing the wire fastener. When the wire fastener is closed (when the two sides 2a and 2b of the covering material 2 are joined by the connecting portion 3), the covering material 2 has a cylindrical shape with no bottom. In a state in which the wire fastener is opened (a state in which the joining of the two side portions 2a and 2b of the covering material 2 by the connecting portion 3 is removed and widened), the covering material 2 has a strip shape (rectangular shape). In order to prevent fraying of the sides 2a and 2b of the covering material 2, the space between the wire fastener and the covering material 2 may be reinforced by a reinforcing film such as a heat-meltable resin sheet.

  The pair of side lids 4a and 4b are respectively provided on both end surfaces of the sound absorbing material 1 extending in a direction intersecting with the axis X (orthogonal in FIG. 2). The pair of side lids 4a and 4b form a cap structure including a main body portion 4c and an annular rib 4d provided on the outer edge of the main body portion 4c. FIG. 1 shows an example in which the main body portion 4c of the side lids 4a and 4b has a disk shape. Both ends of the sound absorbing material 1 covered with the covering material 2 are fitted into the pair of side lids 4a and 4b. The body portions 4 c of the side lids 4 a and 4 b have substantially the same shape as the end surface of the sound absorbing material 1 covered with the covering material 2. In the present embodiment, the main body portion 4c of the side lids 4a and 4b and the end surface of the sound absorbing material 1 covered with the covering material 2 have a circular shape. A through hole 4e is provided in the vicinity of the center of the main body 4c of the side lid 4a, and a female screw 4f is cut in a side wall of the through hole 4e. A non-through hole 4g is provided in the vicinity of the center of the body portion 4c of the side lid 4b, and a female screw 4h is cut on the side wall of the non-through hole 4g. A metal material, a resin material, a wood material, or the like is used for the side lids 4a and 4b.

  The rod-shaped member 5 is a reinforcing member that fixes the pair of side lids 4a and 4b. The rod-shaped material 5 penetrates through the hollow portion 9 of the sound absorbing material 1 and extends in the axis X direction. One end of the rod-like material 5 passes through a through hole 4e provided near the center of the side lid 4a, and the other end of the rod-like material 5 is fixed to a non-through hole 4g provided near the center of the side lid 4b. Has been. One end of the rod-shaped member 5 is cut with a male screw corresponding to the above-described female screw 4f. A male thread corresponding to the female thread 4h is cut at the other end of the rod-shaped member 5. More specifically, the side cover 4a passes through the through hole 4e of the side cover 4a at one end of the rod-shaped member 5 and reaches the place necessary for sandwiching the sound absorbing material 1 between the side cover 4a and the side cover 4b. The male thread is cut to the length that can be moved. The other end of the rod-shaped member 5 is cut off with a male thread to a length that allows the rod-shaped member 5 to be screwed into the non-through hole 4g of the side lid 4b. As the rod-shaped member 5, for example, a long screw can be used. Thus, by providing the rod-shaped member 5, the pair of side lids 4a and 4b can be firmly fixed. Further, the sound absorbing material 1 can be suitably fixed by the rod-shaped material 5 and the pair of side lids 4a and 4b. In addition, since the rod-shaped material 5 is inside the sound absorbing material 1, the influence on the sound absorption characteristics is small as compared with the case where the rod-shaped material 5 is provided outside the sound absorbing material 1.

  Further, as shown in FIG. 2, at one end of the rod-shaped member 5, in addition to the fixing of the rod-shaped member 5 with the male screw and the female screw 4f of the side cover 4a, the rod-shaped member 5 is passed through the opening of the nut 5a. The side lid 4a may be pressed. At the other end of the rod-shaped member 5, in addition to fixing the rod-shaped member 5 with the male screw and the female screw 4h of the side lid 4b, the rod-shaped member 5 is passed through the opening of the nut 5b, and the side lid 4b is pressed by the nut 5b. Also good. Further, at one end of the rod-shaped member 5, in addition to fixing with the male screw of the rod-shaped member 5 and the female screw 4f of the side lid 4a, one end of the rod-shaped member 5 and the side lid 4a may be fixed by welding. Further, at the other end of the rod-shaped member 5, in addition to fixing with the male screw of the rod-shaped member 5 and the female screw 4h of the side lid 4a, the other end of the rod-shaped member 5 and the side lid 4b may be fixed by welding.

  The attachment 6a can be provided near the center of the main body 4c of the side lid 4a. The attachment 6a is a member for suspending and attaching the sound absorber 10 from a ceiling or the like. For example, a ring-type metal fitting can be used as the fixture 6a. A metal material or a resin material is used for the fixture 6a.

  It is also possible to employ a structure in which the side cover 4a having the through hole 4e and the fixture 6a are used at both ends of the sound absorber 1. In this case, the rod-shaped material 5 can be provided so as to penetrate the sound absorbing material 1 and extend in a predetermined axial direction, and to penetrate the through holes 4e provided in each of the pair of side lids 4a.

  The fixtures 7a and 7b can be provided on a part of the outer edge of the main body portion 4c of the side lids 4a and 4b. The fixtures 7a and 7b are members for attaching the sound absorber 10 to a ceiling or a wall surface. For example, an L-shaped metal fitting can be used as the fixture 7. A metal material or a resin material is used for the fixtures 7a and 7b.

  FIG. 4 shows a state in which the sound absorber 10 according to the present embodiment is attached to the room 40. When the sound absorber 10 is suspended from the ceiling 21, the support 11 of the ceiling 21 and the attachment 6 a of the sound absorber 10 are connected via a suspension member 31 such as a chain. Alternatively, the sound absorber 10 may be directly attached to the wall surface 22 by the fixtures 7a and 7b. Further, the sound absorber 10 may be disposed directly on the floor surface 23.

  According to the sound absorber 10 as described above, since the covering material 2 is provided so as to cover the outer surface of the sound absorbing material 1, dirt such as dust and dust adheres to the covering material 2. And since it is possible to make the covering material 2 detachable from the sound absorbing material 1 by the connecting portion 3, it is possible to simply remove the dirty covering material 2 and attach a new covering material to the sound absorbing material 1, thereby easily making the sound absorbing body. Ten cleanings can be performed. Therefore, compared with the case where the sound absorber 10 itself is replaced with a new sound absorber, the burden of cleaning work can be reduced. Further, by replacing the dirty covering material 2 with a new covering material, the sound absorbing material 1 itself can be used continuously without having to be replaced, so that the sound absorbing material 1 can be used effectively.

  The preferred embodiment of the present invention has been described in detail above, but the present invention is not limited to the above embodiment. In the said embodiment, although the sound-absorbing material 1 showed the example which is a cylindrical shape which has the hollow part 9, the column shape etc. which do not have the hollow part 9 may be sufficient as the sound-absorbing material 1. Here, when the cylindrical sound absorbing material 1 and the rod-shaped material 5 are used as the sound absorbing body 10, the rod-shaped material 5 extending in a predetermined axial direction may be provided so as to penetrate the vicinity of the center of the sound absorbing material 1. When the sound absorbing material 1 is circular such as cylindrical or columnar, the uniformity of the sound absorbing direction is improved.

  In the above embodiment, the covering material 2 has a cylindrical shape with no bottom when the wire fastener is closed, and the covering material 2 has a belt shape when the wire fastener is opened. However, the shape of the covering material 2 is not limited thereto, and the covering material 2 may have a bag shape and cover the entire surface of the sound absorbing material 1. That is, the covering material 2 can cover not only the outer surface of the sound absorbing material 1 but also the end surface. In this case, the connection part 3 such as a wire fastener can be provided in a cut provided in a part of the bag-shaped covering material 2.

  In the above embodiment, a wire fastener is used as an example of the connection portion 3. However, the connection portion 3 may be a connection means such as a fastener, and may be a hook-and-loop fastener such as Velcro (registered trademark) or a snap button. A fastener or the like may be used.

  1 and 2 show examples in which the side lids 4a and 4b have a cap structure, but the side lids may have a plate shape such as a disc. Further, in the cap structure in which the side lids 4a and 4b are composed of the main body portion 4c and the annular rib 4d, the main body portion 4c is not limited to a disk shape, but may be a three-dimensional shape such as a hemisphere. In addition, when the sound absorber 10 is directly installed on the floor surface 23, the sound absorber 10 may further include a leg stand or the like for preventing overturning.

  In the said embodiment, although the example which has the single rod-shaped material 5 was shown, multiple rod-shaped materials may be sufficient. Thereby, a pair of side lids 4a and 4b can be fixed more firmly.

  In the above-described embodiment, an example in which both the fixtures 6a and 6b and the fixtures 7a and 7b are provided on the pair of side lids 4a and 4b has been shown, but depending on the installation state of the sound absorber 10, the fixtures 6a and 6b Only one of 6b and fixtures 7a and 7b may be used.

  Further, in order to improve the sound absorbing performance, an intermediate material 8 may be provided between the sound absorbing material 1 and the covering material 2 in the sound absorbing body 20 as shown in FIG. As the intermediate material 8, for example, a film such as a polyethylene film is used. FIG. 6 shows the frequency dependence of the sound absorption coefficient depending on the presence or absence of the intermediate material 8 (polyethylene film). In FIG. 6, the horizontal axis indicates the frequency (Hz), the vertical axis indicates the sound absorption coefficient, G1 indicates the case with the intermediate material 8, and G2 indicates the case without the intermediate material 8. As can be seen from FIG. 6, the sound absorption coefficient at a high frequency is lower than when there is no intermediate material 8. Thus, by providing the intermediate material 8 between the sound absorbing material 1 and the covering material 2, the sound absorbing characteristics in a desired frequency band can be adjusted.

  DESCRIPTION OF SYMBOLS 1 ... Sound absorption material, 2 ... Coating | covering material, 3 ... Connection part, 4a, 4b ... Side cover, 4c ... Main part, 4d ... Rib, 4e ... Through-hole, 4f, 4h ... Female screw, 4g ... Non-through-hole, 5 ... Rod-shaped material, 5a, 5b ... Nut, 6a ... Mounting tool, 7a, 7b ... Fixing tool, 8 ... Intermediate material, 9 ... Hollow part, 10, 20 ... Sound absorber.

Claims (5)

A sound-absorbing material extending in a predetermined axial direction and having a sound-absorbing property;
A covering material covering an outer surface extending in the predetermined axial direction of the sound absorbing material;
A pair of side covers respectively provided on both end surfaces extending in a direction intersecting the predetermined axis direction in the sound absorbing material,
The sound absorbing body, wherein the covering material is provided with a connecting portion that makes the covering material detachable from the sound absorbing material.   The sound absorber according to claim 1, wherein the sound absorbing material is cylindrical or columnar.   The sound absorber according to claim 1, wherein the connection portion is a fastener. The pair of side lids has a cap structure having an annular rib,
The sound absorber according to any one of claims 1 to 3, wherein both ends of the sound absorbing material covered with the covering material are fitted into the pair of side lids. A rod-shaped material extending through the sound-absorbing material and extending in the predetermined axial direction;
The sound absorber according to any one of claims 1 to 4, wherein the sound absorbing material is fixed between the pair of side lids by fixing the pair of side lids to the rod-shaped material.

Images