JP2006095115A - Fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide fixture Z where a reverberation time of the whole of a room can easily be controlled while construction to the inside of the room where special acoustic consideration is not given is not required. <P>SOLUTION: The fixture is provided with: a fixture main body 1 which is used in the room such as a lecture room where the special acoustic consideration is not given and which nearly reflects sound waves radiated from an electric sound source; and a sound absorption part 2 which is provided at the main body 1 detachably and which can absorb the sound waves. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fixture used in a room such as a lecture room where no special acoustic consideration is made.

  In recent years, for example, lectures are performed using a PA system including a microphone and a speaker in a large classroom at a university, and lectures such as playing a moving image file on a personal computer are increasing.

  The prior art as described above is a very general technique, and there is no special disclosure as patent literature.

  However, the desks and chairs used in such large classrooms, for example, have a large sounding sound depending on whether or not the audience is seated, such as a chair used in a concert hall. In order not to make a difference, special acoustic considerations such as the use of a flip-up chair with a perforated plate and a sound absorbing material inside the perforated plate are not made. Moreover, because desks and chairs used in large classrooms are mainly made of materials that substantially reflect sound waves, specifically metals, plastics, or wood, sound waves emitted from speakers are absorbed by these chairs and desks. However, the reverberation time of the entire room becomes long, so that the sound reproduced from the speaker loses intelligibility and is very difficult to hear.

  In addition, sound-absorbing boards made of porous materials are often placed on the ceiling of this type of large classroom, but due to its thinness, the sound-absorbing effect cannot be expected so much. Even if it is desired to obtain a suitable sound absorbing effect, it is substantially difficult to solve this problem due to construction problems and the like.

  The present invention has been made paying attention to such a problem, and its main purpose is to easily reduce the reverberation time of the entire room while eliminating the need for construction on the indoor side where no special acoustic consideration is made. It is to provide a controllable fixture.

  That is, the fixture of the present invention is used in a room such as a lecture room where no special acoustic consideration is made, and the fixture main body substantially reflects the sound wave emitted from the electric sound source, and the fixture main body. And a sound absorbing portion that is detachably provided and can absorb the sound wave.

  With such a configuration, for example, as the number of sound absorbing portions is increased, a higher sound absorbing effect can be obtained. Therefore, the reverberation time of the entire room can be shortened, and the clarity of sound and the like can be suitably ensured. In addition, since the sound absorbing part is detachable from the fixture body, the reverberation time of the entire room can be easily controlled by changing the structure of the sound absorbing part, and the sound absorbing part has problems such as deterioration due to aging. It can be easily replaced. Furthermore, since construction on the indoor side is unnecessary, it is possible to reduce the cost burden during construction.

  That is, it is possible to provide a fixture that can easily control the reverberation time of the entire room while eliminating the need for construction on the indoor side where special acoustic considerations are not made.

  If the incident surface on which the sound wave is incident on the sound absorbing part is exposed to an area in the main body of the fixture that is accessible to the user in a normal use state or an area where an article can be placed, the sound absorbing part is exposed. Since the incident surface is not obstructed by the user or the article, a stable sound absorbing effect can be obtained.

  If the incident surface on which the sound wave is incident on the sound absorbing portion is provided at a position covering the surface portion of the fixture main body that can be substantially opposed to the indoor plane such as a ceiling surface or a wall surface, the indoor plane and the surface portion of the fixture Flutter echo generated between the two can be suitably suppressed.

  If the incident surface on which the sound wave enters the sound absorbing portion is configured to be variable with respect to the fixture body, for example, the direct sound from the sound source can be effectively absorbed by making the incident surface face the sound source.

  In addition, in order to make it possible to easily adjust the sound absorption effect by attaching and detaching the sound absorbing portion, the fixture main body includes a plurality of columns, and the sound absorbing portion is elastically engaged between the columns. It is desirable to be detachably clamped.

  In order to facilitate the adjustment of the sound absorption effect by replacing the sound absorbing material, the sound absorbing portion horizontally spans a pair of contact portions that respectively contact the adjacent struts and both end sides of the contact portion. A pair of horizontal portions, and a sound absorbing material disposed in an inner space surrounded by the contact portions and the horizontal portions; the inner space; and the outer space of the contact portions and the horizontal portion; Is preferably communicated at least partially.

  Moreover, as said support | pillar, it is desirable that this support | pillar is a leg part for supporting a top plate.

  As a desirable aspect of the present invention, the fixture main body is a desk type provided with a curtain plate that hangs down from the counter-use end side of the top plate, and the sound absorbing portion is an abbreviation of the counter-use end side surface of the curtain plate. The thing provided in the whole surface and the thing which provided the said sound-absorbing part in the substantially whole surface of the downward surface of a top plate are mentioned.

  Further, the fixture main body may include a storage unit that can store an article, and the sound absorbing unit may be provided in the storage unit.

  As another desirable aspect of the present invention, the fixture body is of a chair type including at least a leg portion that supports a seat on which a user is seated, and the sound absorbing portion is disposed on a surface of the leg portion. What is provided so as to cover substantially, or the furniture main body is of a chair type provided with at least a back portion that supports the back of the user who is seated, and the sound absorbing portion is a surface on the side opposite to the use end of the back portion. Are provided so as to cover substantially.

  As described above, according to the fixture of the present invention, for example, as the number of sound absorbing portions is increased, a higher sound absorbing effect can be obtained. . In addition, since the sound absorbing part is detachable from the fixture body, the reverberation time of the entire room can be easily controlled by changing the structure of the sound absorbing part, and the sound absorbing part has problems such as deterioration due to aging. It can be easily replaced. Furthermore, since construction on the indoor side is unnecessary, it is possible to reduce the cost burden during construction.

  That is, it is possible to provide a fixture that can easily control the reverberation time of the entire room while eliminating the need for construction on the indoor side where special acoustic considerations are not made.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a fixture Z according to the present invention includes a fixture main body 1 and a plurality of sound absorbing portions 2 that are detachably attached to the fixture main body 1 (a sound absorbing portion 2 a for the top plate 11, leg portions). 12 and a sound absorbing portion 2c) for the curtain 13 and used in a room such as a large classroom at a university. Hereinafter, each part will be described.

  The fixture main body 1 is suspended from a top plate 11 having a substantially rectangular shape in plan view, a pair of leg portions 12 that support left and right side end portions of the top plate 11, and a counter-use end side of the top plate 11. It comprises a curtain plate 13 placed horizontally between the parts 12, each part being formed by plastic deformation of a steel material or the like and attached by an appropriate method such as screws or welding. The leg 12 includes a leg column 121 having a substantially vertically long rectangular shape when viewed from the side, and a leg base 122 extending from the lower end of the leg column 121 toward the use end side. The configuration of the unit 12 is not limited to this.

  The sound absorbing portion 2a for the top plate 11 has a substantially rectangular shape having a size that substantially overlaps with the top plate 11, and is detachably attached to the downward surface 11s of the top plate 11 by an appropriate method. The surface 2a1 of the sound absorbing portion 2a for the top plate 11 corresponds to the incident surface on which sound waves are incident.

  The sound absorbing portion 2b for the leg portion 12 has a substantially rectangular shape having a size that substantially overlaps with the leg strut 121 of the leg portion 12, and is appropriately applied to the outward surface and the inward surface of the leg strut 121. It is attached detachably. In addition, the surface 2b1 of the sound absorbing portion 2b for the leg portion 12 corresponds to an incident surface on which sound waves are incident.

  The sound absorbing portion 2c for the curtain plate 13 is of a substantially rectangular shape having a size that substantially overlaps with the curtain plate 13, and is detachably attached to the opposite end surface of the curtain plate 13 by an appropriate method. Note that the surface 2c1 of the sound absorbing portion 2c for the curtain plate 13 corresponds to an incident surface on which sound waves are incident.

  In addition, in this embodiment, (1) what provided the tension ground on the surface side of the open cell urethane foam is employ | adopted in common for each sound absorption part 2, For example, (2) Open cell urethane The sound absorbing portion 2 can be appropriately changed according to the embodiment, such as a punching panel provided on the surface side of the foam, or (3) a porous type aluminum panel.

  In addition, for example, changing the degree of breathability of the upholstery, changing the surface weight, increasing the thickness of the urethane foam, or providing irregularities in the surface shape, and replacing the urethane foam with a non-woven fabric May be adopted. This is because the sound absorbing characteristics of the sound absorbing portion 2 can be suitably changed by changing the sound absorbing material and the sound absorbing structure in this way. Furthermore, the sound absorbing unit 2 may be a resonator type in which a part of the closed space is opened to the outside.

  Hereinafter, the usage method of the fixture Z is demonstrated below.

  First, the sound absorber 2a for the top plate 11, the sound absorber 2b for the leg 12, and the sound absorber 2c for the curtain 13 are attached to the fixture body 1 in the state of FIG. The state shown in FIG.

  When the sound wave (direct sound x1 or indirect sound x2 reflected on the wall or the like) radiated from the speaker SP provided on the wall surface (not shown), which is a room-side plane in the classroom, reaches the fixture Z, the curtain 13 The sound absorbing portion 2c for the curtain plate 13 provided in FIG. At this time, since the sound absorbing portion 2c for the curtain plate 13 has frequency characteristics, the sound wave that has not been absorbed is reflected, but compared with the case where the sound absorbing portion 2c for the curtain plate 13 is not provided. The reflected energy becomes small. Moreover, since the sound absorbing portion 2a for the top plate 11 and the sound absorbing portion 2b for the leg portion 12 are also provided on the top plate 11 and the leg portion 12, the sound is radiated from the speaker SP and then reached through various acoustic paths. Sound waves can be suitably absorbed by these sound absorbing portions 2. That is, the acoustic energy of the entire room is reduced, and it is possible to suitably ensure the clarity of voice and the like.

  Further, a flutter echo having a frequency characteristic corresponding to the distance may occur between the wall surface on which the speaker SP is arranged and the curtain plate 13, but the surface 131 of the curtain plate 13 is used for the curtain plate 13. Since the sound absorbing portion 2c is provided, this flutter echo can be suitably suppressed.

  Thus, according to the fixture Z according to the present embodiment, the sound absorbing portion 2a for the top plate 11 provided on substantially the entire downward surface 11s of the top plate 11, the outward surface and the inward surface of the leg column 121 are substantially omitted. Since the three sound absorbing parts 2 such as the sound absorbing part 2b for the leg 12 provided on the entire surface and the sound absorbing part 2c for the curtain plate 13 provided on the substantially entire surface of the counter-use end side 131 of the curtain 13 can obtain a high sound absorbing effect. The reverberation time of the whole room can be shortened, and the clarity of voice and the like can be suitably ensured. Further, since the sound absorbing portion 2 is detachable from the fixture body 1, the reverberation time of the entire room can be easily controlled by changing the configuration of the sound absorbing portion 2, and the sound absorbing portion 2 is deteriorated due to aging. Even if there is a problem such as, it can be easily replaced. Furthermore, since construction on the indoor side is unnecessary, it is possible to reduce the cost burden during construction.

  That is, it is possible to provide a fixture Z that can easily control the reverberation time of the entire room while eliminating the need for construction on the indoor side where special acoustic considerations are not made.

  In addition, since the incident surface on which the sound wave enters the sound absorbing unit 2 is exposed to a region in the main body 1 that is accessible to the user in a normal use state or a region that avoids the region 11u where the article can be placed. Since the incident surface 2a1, 2b1, 2c1 of the sound absorbing unit 2 is not obstructed by the user or the article, a stable sound absorbing effect can be obtained.

  Further, since the incident surface 2c1 on which the sound wave enters the sound absorbing portion 2 is provided at a position covering the curtain plate 13 substantially opposite to the wall surface, flutter echo generated between the wall surface and the curtain plate 13 is suitably suppressed. can do.

  The present invention is not limited to the embodiment described in detail above.

  For example, if the incident surface of the sound absorbing portion 2c for the curtain plate 13 is configured to be variable with respect to the fixture body 1, for example, the direct sound from the sound source can be effectively absorbed by making the incident surface face the sound source. it can.

  Furthermore, you may provide the said sound absorption part 2 using the accommodating part (not shown) which can accommodate the articles | goods of the said fixture main body 1. FIG.

  In addition, as shown in FIG. 1 (b), a chair-type fixture body 3 including a seat 31, a leg portion 32 that supports the seat 31, and a back portion 33 that supports the back of a user seated on the seat 31. On the other hand, the thing to which the sound absorption part 4 is applied is mentioned.

  Specifically, the sound absorbing portion 4 is provided so as to substantially cover the surface of the leg portion 32, and the sound absorbing portion 4 is provided so as to substantially cover the surface of the back portion 33 on the side opposite to the use end. In addition, it does not prevent providing in the position which covers a part or all of the surface by the side of the use end of the back part 33. FIG.

  Further, as shown in FIG. 2, the sound absorbing portion is configured to be detachably sandwiched between the plurality of leg portions 12 of the fixture body 1 by elastic engagement, and the sound absorbing effect is adjusted by attaching and detaching the sound absorbing portion. Can be made easy.

  Specifically, the sound absorbing portion 5 has a pair of abutting portions 501 having a partial arc shape in a cross-sectional view that abuts the adjacent cylindrical leg portions 12 respectively, and a pair of both ends of the abutting portion 501 that are horizontally mounted. A horizontal portion 502, and a sound absorbing material (not shown) disposed in an inner space surrounded by the contact portion 501 and the horizontal portion 502, and the inner space 2k; For example, a plurality of holes (not shown) penetrating in the thickness direction may be formed in the horizontal portion 502 so that the contact portion 501 and the space 1k outside the horizontal portion 502 communicate at least partially. .

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The whole perspective view of the fixture which concerns on one Embodiment of this invention. Schematic which shows the sound absorption part which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Fixture body 2 ... Sound absorption part 3 ... Fixture body 4 ... Sound absorption part 5 ... Sound absorption part 11 ... Top plate 11u ...・ Area that can be touched by a user in a normal use state or an area where an article can be placed 12... Leg 13... Curtain 31... Seat 32. · Back 131 ··· Surface portion 501 of fixture body 1 ··· Contact portion 502 ··· Horizontal portion 2a1 ··· Incident surface 2b1 ··· Incident surface 2c1 ··· Incident surface 2k ··· Space 1k ... Outer space SP ... Electric sound source (speaker)
Z ... fixtures

Claims (12)

It is used in a room such as a lecture room where no special acoustic considerations are made,
A fixture comprising: a fixture main body that substantially reflects sound waves radiated from an electrical sound source; and a sound absorbing portion that is detachably provided on the fixture main body and can absorb the sound waves. The incident surface on which the sound wave in the sound absorbing portion is incident,
The fixture according to claim 1, wherein the fixture main body is exposed to a region where a user can touch in a normal use state or a region where an article can be placed. The incident surface on which the sound wave in the sound absorbing portion is incident,
The fixture according to claim 1 or 2, wherein the fixture is provided at a position covering a surface portion of the fixture main body which can be substantially opposed to a room-side plane such as a ceiling surface or a wall surface.   The fixture according to claim 1, 2 or 3, wherein an incident surface on which the sound wave enters the sound absorbing portion is configured to be variable with respect to the fixture main body. The fixture main body is provided with a plurality of columns,
The fixture according to claim 1, 2, 3, or 4, wherein the sound absorbing portion is detachably held between the columns by elastic engagement. The sound absorbing portion is surrounded by a pair of abutting portions that respectively abut on adjacent struts, a pair of horizontal portions that laterally cross both ends of the abutting portion, and an inner side surrounded by the abutting portions and the horizontal portion Sound absorbing material arranged in the space of
The fixture according to claim 5, wherein the inner space and the outer space of the contact portion and the horizontal portion are communicated at least partially.   The fixture according to claim 5 or 6, wherein the column is a leg for supporting the top plate. The fixture body is of a desk type provided with a curtain plate hanging from the counter-use end side of the top plate,
The fixture according to claim 1, 2, 3, or 4, wherein the sound absorbing portion is provided on substantially the entire side surface of the curtain plate opposite to the use end.   The fixture according to claim 1, 2, 3, 4, or 8, wherein the sound absorbing portion is provided on substantially the entire downward surface of the top plate. The fixture main body is provided with a storage unit that can store articles,
The furniture according to claim 1, 2, 3, 4, 8, or 9, wherein the sound absorbing portion is provided in the housing portion. The fixture body is of a chair type including at least a leg portion that supports a seat on which a user is seated,
The fixture according to claim 1, 2, 3, or 4, wherein the sound absorbing portion is provided so as to substantially cover a surface of the leg portion. The fixture body is of a chair type provided with at least a back portion for supporting the back of a user who is seated,
The fixture according to claim 1, 2, 3, 4, or 11, wherein the sound absorbing portion is provided so as to substantially cover a surface of the back portion on the side opposite to the use end.

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