JPH10307588A - Sound insulating structure and sound insulating wall for casing panel - Google Patents
Sound insulating structure and sound insulating wall for casing panelInfo
- Publication number
- JPH10307588A JPH10307588A JP9116881A JP11688197A JPH10307588A JP H10307588 A JPH10307588 A JP H10307588A JP 9116881 A JP9116881 A JP 9116881A JP 11688197 A JP11688197 A JP 11688197A JP H10307588 A JPH10307588 A JP H10307588A
- Authority
- JP
- Japan
- Prior art keywords
- panel
- noise
- interference plate
- plate
- sound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Building Environments (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は騒音発生源が内蔵さ
れた筐体のパネル面から発する騒音を低減するための遮
音構造に関し、また、騒音発生源の前に配置して遮音を
行う遮音壁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulating structure for reducing noise emitted from a panel surface of a housing in which a noise generating source is built, and to a sound insulating wall disposed in front of the noise generating source to perform sound insulation. .
【０００２】[0002]
【従来の技術】従来、電源装置等の機器は、防塵や危険
防止のために一般に筐体内に収容して使用されている
が、高周波電源装置等、高周波数でスイッチングする装
置では、そのスイッチング周波数でその構成部品が振動
して騒音発生源となり、その振動が周囲の部品や支持部
材等を介して筐体のパネルに伝達されて、パネル面から
周囲に不快な騒音を発生する問題があった。2. Description of the Related Art Conventionally, devices such as a power supply device are generally housed in a housing for dust prevention and danger prevention. However, in a device that switches at a high frequency, such as a high-frequency power supply device, the switching frequency is high. Therefore, there is a problem that the component parts vibrate and become a noise generation source, and the vibration is transmitted to the panel of the housing via surrounding parts and support members, etc., and unpleasant noise is generated from the panel surface to the surroundings. .
【０００３】そこで、従来では、騒音発生源の内蔵され
ている筐体の内側に制振材を張ったり、外部に遮音壁を
設けており、さらに、特開平７−６４５６４号公報に記
載されているように、厚さ方向に貫通した開口部を形成
して、前記開口部内の空気質量の共振周波数を音源主周
波数成分の略１／√２倍よりも下回るように構成した特
殊な遮音壁を音源となるパネル面に沿って近接配置し
て、パネル面から発生するこのような騒音を低減させる
ことも提案されている。Therefore, conventionally, a vibration damping material is provided inside a housing in which a noise generating source is built, or a sound insulating wall is provided outside, and further described in Japanese Patent Application Laid-Open No. 7-64564. As described above, an opening penetrating in the thickness direction is formed, and a special sound insulation wall configured so that the resonance frequency of the air mass in the opening is lower than approximately 1 / √2 times the main frequency component of the sound source is defined as the sound source. It has also been proposed to dispose such noise in close proximity along the panel surface to reduce such noise generated from the panel surface.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、騒音発
生源が内蔵されている筐体の内側に制振材を張る場合に
は、制振材として一般に放熱特性の悪いゴムが用いられ
ているため、電源装置等から発生する熱が筐体内部にこ
もる問題があり、これを解消するために、別途クーラー
等を設けて筐体内部を冷却する必要があった。However, when a damping material is provided inside a housing in which a noise generating source is built, rubber having poor heat radiation properties is generally used as the damping material. There is a problem that heat generated from a power supply device or the like is trapped inside the housing. In order to solve the problem, it is necessary to provide a separate cooler or the like to cool the inside of the housing.
【０００５】また遮音壁を用いる場合には、従来の遮音
壁は、騒音発生源と共振してそれ自体が新たな騒音発生
源とならないようにするために重厚に作られており、そ
の設置や運搬作業に多大な労力を要するとともに、筐体
周囲に遮音壁を設けるためのスペースを確保する必要が
あった。When a sound insulating wall is used, the conventional sound insulating wall is made heavy in order to resonate with the noise source and not to become a new noise source itself. Requires a great deal of labor, and it is necessary to secure a space for providing a sound insulation wall around the housing.
【０００６】また、前述した特開平７−６４５６４号公
報に記載されているような特殊な遮音壁を用いる場合で
は、遮音壁を騒音発生源からの振動が伝達されない安定
した取付場所を確保する必要があるとともに、振動系を
構成する遮音壁開口部内の空気質量を大きくするため
に、遮音壁自体を厚くしたり、開口部周縁部を騒音発生
源側に突出させる必要があり、遮音壁の製作コストが高
くなる問題があった。In the case where a special sound insulating wall as described in the above-mentioned Japanese Patent Application Laid-Open No. 7-64564 is used, it is necessary to secure a stable mounting place where the vibration from the noise source is not transmitted to the sound insulating wall. At the same time, in order to increase the mass of air inside the sound insulation wall opening that constitutes the vibration system, it is necessary to increase the thickness of the sound insulation wall itself and protrude the periphery of the opening toward the noise source side, which increases the cost of manufacturing the sound insulation wall. was there.
【０００７】そこで、本発明は、前述したような従来技
術における問題を解決し、騒音発生源が内蔵された筐体
のパネルを介して外側に放射される騒音を容易且つ効果
的に低減できる低コストな遮音構造を提供し、また、運
搬や設置が容易で騒音を効果的に低減できる低コストな
遮音壁を提供することを目的とする。Therefore, the present invention solves the above-mentioned problems in the prior art, and can easily and effectively reduce noise radiated outside through a panel of a housing in which a noise source is built. It is an object of the present invention to provide an inexpensive sound insulation structure, and to provide a low-cost sound insulation wall that can be easily transported and installed and effectively reduce noise.
【０００８】[0008]
【課題を解決するための手段】前記目的のため、本発明
の筐体パネルの遮音構造は、騒音発生源を内蔵する筐体
のパネル外面にその略半分の面積を分散して覆う干渉プ
レートを連結部材を介して固定し、前記干渉プレート外
面が前記パネル外面から前記騒音発生源の除去したい周
波数成分の略半波長の奇数倍分の垂直距離だけ離間した
位置でパネル外面と同位相で振動するようにしたもので
ある。In order to achieve the above object, a sound insulation structure for a housing panel according to the present invention comprises an interference plate that covers approximately half the area of the outer surface of the panel in which a noise source is built. It is fixed via a connecting member, and the outer surface of the interference plate vibrates in the same phase as the outer surface of the panel at a position where the outer surface of the interference plate is separated from the outer surface of the panel by a vertical distance of an odd multiple of substantially a half wavelength of a frequency component to be removed by the noise source. It is like that.
【０００９】また、本発明の遮音壁は、後面を騒音発生
源に向けて配置される共振プレートの前面にその略半分
の面積を分散して覆う干渉プレートを連結部材を介して
固定し、前記干渉プレート前面が前記共振プレート前面
と前記騒音発生源の除去したい周波数成分の略半波長の
奇数倍分の垂直距離だけ離間した位置で共振プレート外
面と同位相で振動するようにしたものである。Further, in the sound insulation wall according to the present invention, an interference plate that covers approximately half the area dispersedly on the front surface of the resonance plate disposed with the rear surface facing the noise generation source is fixed via a connecting member, and the interference plate is fixed. The plate front surface vibrates in the same phase as the outer surface of the resonance plate at a position where the front surface of the plate is separated from the front surface of the resonance plate by a vertical distance of an odd multiple of substantially a half wavelength of the frequency component to be removed by the noise source.
【００１０】[0010]
【作用】本発明の筐体パネルの遮音構造においては、筐
体のパネルに騒音発生源の振動が伝達されてこれが振動
すると、連結部材で前記パネルに固定されている干渉プ
レートがパネルと同位相で振動する。In the sound insulation structure of the housing panel of the present invention, when the vibration of the noise source is transmitted to the housing panel and vibrates, the interference plate fixed to the panel by the connecting member has the same phase as the panel. Vibrates at
【００１１】パネルの外面と干渉プレートの外面は、騒
音発生源の除去したい周波数成分の略半波長の奇数倍分
の垂直距離だけ離間しているため、干渉プレートの振動
によってその外面から放射される音波は、パネルの振動
によってその外面から放射される音波と前記周波数の成
分が逆位相となり、干渉プレートの外側では両方の音波
が干渉して前記周波数成分が互いに打ち消し合い、騒音
が低減される。The outer surface of the panel and the outer surface of the interference plate are separated from each other by a vertical distance equivalent to an odd multiple of substantially a half wavelength of the frequency component to be removed from the noise source, and are radiated from the outer surface by the vibration of the interference plate. As for the sound wave, the sound wave radiated from the outer surface due to the vibration of the panel and the component of the frequency have opposite phases, and outside the interference plate, both sound waves interfere with each other and the frequency components cancel each other, thereby reducing noise.
【００１２】また、本発明の遮音壁においては、後面を
騒音発生源に向けて配置された共振プレートが前記騒音
発生源から受ける音波で振動すると、前記共振プレート
に連結部材で固定されている干渉プレートが共振プレー
トと同位相で振動する。In the sound insulation wall according to the present invention, when a resonance plate disposed with its rear surface facing the noise source vibrates with a sound wave received from the noise source, an interference plate fixed to the resonance plate by a connecting member is provided. Vibrate in phase with the resonance plate.
【００１３】共振プレートの前面と干渉プレートの前面
は、騒音発生源の除去したい周波数成分の略半波長の奇
数倍分の垂直距離だけ離間しているため、干渉プレート
の振動によって前面から放射される音波は、パネルの振
動によってその前面から放射される音波と前記周波数の
成分が逆位相となり、干渉プレートの外側では、両方の
音波が干渉して前記周波数成分が互いに打ち消し合い、
騒音発生源からの騒音が低減される。The front surface of the resonance plate and the front surface of the interference plate are separated from each other by a vertical distance that is an odd multiple of substantially a half wavelength of the frequency component to be removed from the noise source, so that the front surface is radiated by the vibration of the interference plate. The sound wave, the sound wave radiated from the front surface by the vibration of the panel and the component of the frequency have opposite phases, outside the interference plate, both sound waves interfere with each other, the frequency components cancel each other,
Noise from the noise source is reduced.
【００１４】[0014]
【実施例】以下、図面に基づいて本発明を詳細に説明す
る。図１は、本発明のパネルの遮音構造の一実施例を示
す断面図であって、筐体１の前面のパネル２の内側に高
周波電源３が隣接配置されている。前記高周波電源３
は、１２．２ＫＨｚでスイッチング動作を行うもので、
その動作時にはこれを主周波数成分とした騒音を発生し
ている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing one embodiment of the panel sound insulation structure of the present invention. A high-frequency power supply 3 is disposed adjacently inside a panel 2 on the front surface of a housing 1. The high frequency power supply 3
Performs a switching operation at 12.2 KHz.
During operation, noise is generated with this as the main frequency component.
【００１５】一方、前記筐体１の高周波電源３に隣接し
ているパネル２の外面には、多数の棒状の連結部材４が
分散して立設されていて、それぞれの先端に円板型の干
渉プレート５が固定されている。On the other hand, on the outer surface of the panel 2 adjacent to the high-frequency power supply 3 of the housing 1, a number of rod-shaped connecting members 4 are erected in a dispersed manner, and a disc-shaped connecting member is provided at each end. The interference plate 5 is fixed.
【００１６】これらの干渉プレート５は、パネル２の表
面と干渉プレート５の表面が高周波電源３の周波数に対
応する音波の略半波長分の垂直距離ｄだけ離間した位置
で、同位相で振動するようになっており、また、図２に
示すように、パネル２の表面の略半分の面積を覆うよう
に分散して配置されている。These interference plates 5 vibrate in the same phase at a position where the surface of the panel 2 and the surface of the interference plate 5 are separated from each other by a vertical distance d substantially half a wavelength of a sound wave corresponding to the frequency of the high frequency power supply 3. In addition, as shown in FIG. 2, they are distributed so as to cover substantially half the area of the surface of the panel 2.
【００１７】図３に示すように、連結部材４の一方の端
にはネジ部４Ａが設けられており、前記ネジ部４Ａをパ
ネル２に形成されている取付孔６に差し込み、パネル２
の裏面側からナット７を螺合することによって、連結部
材４がパネル２に固定されている。As shown in FIG. 3, a threaded portion 4A is provided at one end of the connecting member 4, and the threaded portion 4A is inserted into a mounting hole 6 formed in the panel 2, and
The connection member 4 is fixed to the panel 2 by screwing a nut 7 from the back side of the panel 2.
【００１８】また、連結部材４の他方の端部にはネジ孔
４Ｂが形成されており、前記ネジ孔４Ｂに干渉プレート
５の中心に形成された中心孔５Ａを貫通して取付ネジ８
が螺合され、干渉プレート５が連結部材４に固定されて
いる。A screw hole 4B is formed at the other end of the connecting member 4. The screw hole 4B passes through a center hole 5A formed at the center of the interference plate 5, and a mounting screw 8B is formed.
Are screwed together, and the interference plate 5 is fixed to the connecting member 4.
【００１９】前記パネル２の外面と干渉プレート５の外
面との垂直距離ｄは、本実施例では、標準状態での空気
中の音速を３４０ｍ／秒、高周波電源３の発する騒音の
主周波数を１２．２ＫＨｚとすると、その波長はほぼ
２．８ｃｍとなり、ｄ≒１．４ｃｍに設定されている。In the present embodiment, the vertical distance d between the outer surface of the panel 2 and the outer surface of the interference plate 5 is 340 m / sec in the air in the standard state, and 12 mm in the main frequency of the noise generated by the high frequency power supply 3. Assuming that the frequency is 0.2 KHz, the wavelength is approximately 2.8 cm, and d ≒ 1.4 cm.
【００２０】図１に示すように、高周波電源３のスイッ
チング動作の振動にパネル２が共振してその外面から音
波Ｓが生じ、干渉プレート５間の隙間を通過して前方へ
放射される。As shown in FIG. 1, the panel 2 resonates with the vibration of the switching operation of the high-frequency power supply 3, and a sound wave S is generated from the outer surface of the panel 2, and radiated forward through the gap between the interference plates 5.
【００２１】一方、パネル２のともに振動する干渉プレ
ート５の外面からは、音波Ｓ’が放射されるが、前記音
波Ｓ’は、パネル２外面よりも略半波長分の距離ｄだけ
前方から放射されるため音波Ｓと逆位相となり、干渉プ
レート５の外側では、これらの音波Ｓ，Ｓ’どうしが互
いに打ち消しあって騒音が低減する。On the other hand, a sound wave S 'is radiated from the outer surface of the interference plate 5 which vibrates together with the panel 2, but the sound wave S' is radiated from the front of the outer surface of the panel 2 by a distance d substantially half a wavelength. As a result, the sound wave S has an opposite phase to the sound wave S, and these sound waves S and S ′ cancel each other outside the interference plate 5 to reduce noise.
【００２２】なお、パネル２の外面と干渉プレート５の
外面との距離ｄは、高周波電源３の周波数主成分に対応
する音波の略半波長分の奇数倍に設定すれば、パネル２
の外面から放射される音波と干渉プレート５の外面から
放射される音波は逆位相となって騒音の低減効果が得ら
れる。If the distance d between the outer surface of the panel 2 and the outer surface of the interference plate 5 is set to be an odd multiple of approximately half the wavelength of the sound wave corresponding to the main frequency component of the high frequency power supply 3,
The sound wave radiated from the outer surface of the interference plate 5 and the sound wave radiated from the outer surface of the interference plate 5 have opposite phases, and a noise reduction effect is obtained.
【００２３】実際には、パネル２から外部へ放射される
騒音は種々の周波数成分を含んでいるため、前記距離ｄ
は高周波電源３の主周波数に対応する音波の略半波長分
の奇数倍に設定する。なお、騒音の中から特に人が不快
に感じる特定の周波数のものを除去したい場合には、距
離ｄは前記特定の周波数の音の略半波長分の奇数倍に設
定してもよい。In practice, the noise radiated from the panel 2 to the outside contains various frequency components, so that the distance d
Is set to an odd multiple of approximately half the wavelength of the sound wave corresponding to the main frequency of the high frequency power supply 3. When it is desired to remove noise of a specific frequency which is particularly uncomfortable to humans from the noise, the distance d may be set to an odd multiple of substantially half wavelength of the sound of the specific frequency.
【００２４】次に、図４は本発明の他の実施例を示すも
のであって、同図（Ａ）は、干渉プレート５を正方形状
としたもので、パネル２の外面の略半分の面積を分散し
て覆うように、個々の干渉プレート５の面積と数が選択
される。FIG. 4 shows another embodiment of the present invention. FIG. 4A shows a case where the interference plate 5 has a square shape, and the area of the outer surface of the panel 2 is substantially half. The area and number of the individual interference plates 5 are selected so as to disperse and cover.
【００２５】また、（Ｂ）は、干渉プレート５をパネル
２外面と同程度の大きさの一枚の板体で形成し、円形の
透孔５Ｂを均等に分散して形成したもの、（Ｃ）は、干
渉プレート５をパネル２外面と同程度の大きさの一枚の
板体で形成し、正方形状の透孔５Ｃを均等に分散して形
成したものであって、（Ｂ）及び（Ｃ）の干渉プレート
５においては、パネル２の外面の略半分の面積を分散し
て覆うように、個々の孔の面積や数が選択される。(B) shows a case in which the interference plate 5 is formed of a single plate having the same size as the outer surface of the panel 2 and the circular through-holes 5B are uniformly distributed. In (B), (B) and (B) are diagrams in which the interference plate 5 is formed of a single plate having the same size as the outer surface of the panel 2 and the square through-holes 5C are uniformly dispersed. In the interference plate 5 of C), the area and the number of the individual holes are selected so as to disperse and cover substantially half the area of the outer surface of the panel 2.
【００２６】次に、図５は、本発明の遮音壁の一実施例
を示すものであって、遮音壁１１は、騒音発生源１２に
後面を向けて配置される共振プレート１３を有してお
り、前記共振プレート１３の前面に、多数の干渉プレー
ト１４が前記共振プレート１３前面の略半分の面積を分
散して覆うように配置されている。Next, FIG. 5 shows an embodiment of the sound insulation wall of the present invention. The sound insulation wall 11 has a resonance plate 13 which is arranged with the rear surface facing the noise source 12. A large number of interference plates 14 are arranged on the front surface of the resonance plate 13 so as to disperse and cover substantially half the area of the front surface of the resonance plate 13.
【００２７】前記干渉プレート１４は、本実施例におい
ては、前述した図１〜図３に示す干渉プレート５と同様
な円板状のものが用いられていて、共振プレート１３に
連結部材１５を介して固定されている。In the present embodiment, the interference plate 14 is a disk-shaped one similar to the interference plate 5 shown in FIGS. 1 to 3 described above. Is fixed.
【００２８】共振プレート１３の前面と干渉プレート１
４の前面は騒音発生源１２の除去したい周波数成分の略
半波長の奇数倍分の垂直距離Ｄだけ離間して両者が同位
相で一体に振動するように配置されている。なお、前記
連結部材１５は、図３に示した連結部材４と同じ構造を
有している。The front surface of the resonance plate 13 and the interference plate 1
The front surface 4 is disposed so as to be separated by a vertical distance D that is an odd multiple of substantially a half wavelength of the frequency component to be removed by the noise generation source 12 so that the two vibrate together in the same phase. The connecting member 15 has the same structure as the connecting member 4 shown in FIG.
【００２９】前記遮音壁１１は、共振プレート１３が騒
音発生源１２から放射される音波で振動すると、連結部
材１５でこれと一体に連結された干渉プレート１４が共
振プレート１３と同位相で振動する。When the resonance plate 13 vibrates with the sound wave radiated from the noise source 12, the interference plate 14 vibrated in the same phase as the resonance plate 13 by the connecting member 15 in the sound insulating wall 11.
【００３０】この際、共振プレート１３の振動によって
その前面から放射される音波と干渉プレート１４の前面
から放射される音波は、その主周波数成分が逆位相にな
り、干渉プレート１４の外側では、両方の音波が干渉し
て主周波数成分が互いに打ち消し合い、騒音発生源１２
から出る騒音が低減される。At this time, the sound wave radiated from the front surface of the resonance plate 13 and the sound wave radiated from the front surface of the interference plate 14 have opposite main frequency components in phase. The sound waves interfere with each other and the main frequency components cancel each other, so that the noise source 12
Noise generated from the vehicle is reduced.
【００３１】なお、共振プレート１３に取り付けられる
干渉プレート１４は、本実施例のように円板型の他、前
述した図４に示すものと同様な各種の形状のものを用い
ることができる。As the interference plate 14 attached to the resonance plate 13, not only a disk type as in this embodiment but also various shapes similar to those shown in FIG. 4 described above can be used.
【００３２】次に、図６は、前述した図１〜図３に示す
パネルの遮音構造を適用した筐体に内蔵された電源装置
から発生する騒音を、筐体のパネル外部で実測した結果
あって、筐体前面のパネル中央から３０ｃｍ離れた位置
で騒音レベルを計測したものである。このときの前記パ
ネル外面と干渉プレート外面との垂直距離は１．４ｃｍ
である。Next, FIG. 6 shows the results of actual measurement of the noise generated from the power supply device built in the housing to which the panel sound insulation structure shown in FIGS. The noise level was measured at a position 30 cm away from the center of the panel on the front of the housing. At this time, the vertical distance between the outer surface of the panel and the outer surface of the interference plate is 1.4 cm.
It is.
【００３３】一方、図７は、図６の実測に用いたものと
同一構造の電源装置を内蔵した筐体から発生する騒音
を、干渉プレートを取り付けていない筐体前面のパネル
中央から３０ｃｍ離れた位置での騒音レベルを実測した
結果である。On the other hand, FIG. 7 shows that noise generated from a housing having a power supply unit having the same structure as that used in the actual measurement shown in FIG. 6 is separated by 30 cm from the center of the front panel of the housing where no interference plate is attached. It is a result of actually measuring a noise level at a position.
【００３４】図６と図７に示す騒音レベルの実測結果を
比較すると、電源装置のスイッチングの周波数である１
２．２ＫＨｚにおいて、干渉プレートを用いた場合は、
４８．７ｄＢであるのに対し、干渉プレートの無い場合
は、５９．２ｄＢであり、本発明の遮音構造によって、
１０ｄＢ以上の騒音低減効果を得られることが判明し
た。A comparison between the actual measurement results of the noise level shown in FIGS. 6 and 7 shows that the switching frequency 1
At 2.2 KHz, when using an interference plate,
48.7 dB, but 59.2 dB when there is no interference plate. With the sound insulation structure of the present invention,
It has been found that a noise reduction effect of 10 dB or more can be obtained.
【００３５】[0035]
【発明の効果】以上説明したように、本発明の筐体パネ
ルの遮音構造によれば、電源装置等の騒音発生源を内蔵
した筐体のパネルに連結部材で干渉プレートを取り付け
るだけで遮音効果を得ることができるので、低コストで
容易に騒音の低減を行うことができ、しかも、連結部材
の長さを選択することで、騒音中の耳障りな特定の周波
数成分を効果的に取り除くことができる。As described above, according to the sound insulating structure of the housing panel of the present invention, the sound insulating effect can be obtained only by attaching the interference plate to the panel of the housing in which the noise generating source such as the power supply device is incorporated by the connecting member. Therefore, noise can be easily reduced at low cost, and by selecting the length of the connecting member, it is possible to effectively remove annoying specific frequency components in the noise. it can.
【００３６】また、パネルの外側に遮音壁を設置した
り、パネルからの振動が伝達されない部材に遮音壁を取
付けずに済むため、パネル周囲に遮音壁や遮音壁を設置
するためのスペースが不要となるとともに、高周波電源
装置等が内蔵されている筐体の移設を容易に行うことが
できる。In addition, since it is not necessary to install a sound insulating wall outside the panel or to attach a sound insulating wall to a member to which vibration from the panel is not transmitted, a space for installing the sound insulating wall and the sound insulating wall around the panel is not required. The housing in which the high-frequency power supply device or the like is built can be easily moved.
【００３７】さらに、筐体のパネルに熱伝導率の小さい
ゴム等の弾性制振材を張付ける必要がなく、パネル面か
らの放熱効率が向上するため、筐体内に電源装置等から
発生した熱がこもることを防止でき、別途クーラー等を
設けて筐体内部を冷却する必要がない。Further, there is no need to attach an elastic damping material such as rubber having a low thermal conductivity to the panel of the housing, and the heat radiation efficiency from the panel surface is improved. It is possible to prevent stagnation, and there is no need to provide a separate cooler or the like to cool the inside of the housing.
【００３８】また、本発明の遮音壁によれば、共振プレ
ートと干渉プレートとを連結部材で連結した簡単な構造
あるため低コストで製造することができる。しかも、構
造上軽量であるため、容易に騒音発生源の場所まで運ん
で設置することができる。Further, according to the sound insulation wall of the present invention, since the resonance plate and the interference plate have a simple structure connected by the connection member, they can be manufactured at low cost. Moreover, since it is light in structure, it can be easily transported to the location of the noise source and installed.
【００３９】また、前述した発明のパネルの遮音構造と
同様に、連結部材の長さを選択することで、騒音中の耳
障りな特定の周波数成分を効果的に取り除くことができ
る。Further, similarly to the above-described sound insulation structure of the panel according to the invention, by selecting the length of the connecting member, it is possible to effectively remove a specific frequency component that is annoying in noise.
【図１】 本発明の筐体パネルの遮音構造の一実施例を
示す断面図。FIG. 1 is a sectional view showing one embodiment of a sound insulation structure of a housing panel of the present invention.
【図２】 本発明の筐体パネルの遮音構造の一実施例を
示す正面図。FIG. 2 is a front view showing one embodiment of the sound insulation structure of the housing panel of the present invention.
【図３】 パネル表面への干渉プレートの取付構造を示
す斜視部分図。FIG. 3 is a partial perspective view showing a mounting structure of an interference plate on a panel surface.
【図４】 本発明の筐体パネルの遮音構造の他の実施例
における干渉プレートの種々の形状を示す図。FIG. 4 is a view showing various shapes of an interference plate in another embodiment of the sound insulation structure of the housing panel of the present invention.
【図５】 本発明の一実施例を示す遮音壁の断面図。FIG. 5 is a cross-sectional view of a sound insulation wall showing one embodiment of the present invention.
【図６】 本発明の遮音構造が適用された筐体パネル前
面における騒音の測定結果を示す図。FIG. 6 is a diagram showing a measurement result of noise on a front surface of a housing panel to which the sound insulation structure of the present invention is applied.
【図７】 筐体パネル前面から直接放射される騒音の測
定結果を示す図。FIG. 7 is a view showing a measurement result of noise directly radiated from a front surface of a housing panel.
１ 筐体 ２ パネル ３ 高周波電源 ４，１５ 連結部材 ５ 干渉プレート ５Ａ 中心孔 ５Ｂ，５Ｃ 透孔 ６ 取付孔 ７ ナット ８ 取付ネジ １１ 遮音壁 １２ 騒音発生源 １３ 共振プレート DESCRIPTION OF SYMBOLS 1 Housing 2 Panel 3 High frequency power supply 4,15 Connecting member 5 Interference plate 5A Center hole 5B, 5C Through hole 6 Mounting hole 7 Nut 8 Mounting screw 11 Sound insulation wall 12 Noise generating source 13 Resonance plate
Claims (2)
にその略半分の面積を分散して覆う干渉プレートを連結
部材を介して固定し、前記干渉プレート外面が前記パネ
ル外面から前記騒音発生源の除去したい周波数成分の略
半波長の奇数倍分の垂直距離だけ離間した位置でパネル
外面と同位相で振動するように構成したことを特徴とす
る筐体パネルの遮音構造。An interference plate that covers approximately half the area thereof is fixed to an outer surface of a panel containing a noise generating source through a connecting member, and the outer surface of the interference plate is configured to generate the noise from the outer surface of the panel. A sound insulation structure for a housing panel, wherein the panel vibrates in the same phase as the outer surface of the panel at a position separated by a vertical distance of an odd multiple of substantially a half wavelength of a frequency component to be removed from a source.
振プレートの前面にその略半分の面積を分散して覆う干
渉プレートを連結部材を介して固定し、前記干渉プレー
ト前面が前記共振プレート前面と前記騒音発生源の除去
したい周波数成分の略半波長の奇数倍分の垂直距離だけ
離間した位置で共振プレート外面と同位相で振動するよ
うに構成したことを特徴とする遮音壁。2. An interference plate, which disperses and covers approximately half the area thereof, is fixed to a front surface of a resonance plate disposed with its rear surface facing the noise source via a connecting member, and the front surface of the interference plate is fixed to the resonance plate. A sound insulation wall configured to vibrate in the same phase as the outer surface of a resonance plate at a position separated from a front surface by a vertical distance substantially an odd multiple of a half wavelength of a frequency component to be removed by the noise source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9116881A JPH10307588A (en) | 1997-05-07 | 1997-05-07 | Sound insulating structure and sound insulating wall for casing panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9116881A JPH10307588A (en) | 1997-05-07 | 1997-05-07 | Sound insulating structure and sound insulating wall for casing panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10307588A true JPH10307588A (en) | 1998-11-17 |
Family
ID=14697958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9116881A Pending JPH10307588A (en) | 1997-05-07 | 1997-05-07 | Sound insulating structure and sound insulating wall for casing panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10307588A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008190363A (en) * | 2007-02-01 | 2008-08-21 | Yanmar Co Ltd | Covering member for engine |
| JP2017110476A (en) * | 2015-12-18 | 2017-06-22 | 東日本高速道路株式会社 | Sound deadening method and sound deadening structure for elevated structure |
| CN109373400A (en) * | 2018-11-27 | 2019-02-22 | 佛山市云米电器科技有限公司 | A kind of acquisition methods of noise of range hood interference device |
-
1997
- 1997-05-07 JP JP9116881A patent/JPH10307588A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008190363A (en) * | 2007-02-01 | 2008-08-21 | Yanmar Co Ltd | Covering member for engine |
| JP2017110476A (en) * | 2015-12-18 | 2017-06-22 | 東日本高速道路株式会社 | Sound deadening method and sound deadening structure for elevated structure |
| CN109373400A (en) * | 2018-11-27 | 2019-02-22 | 佛山市云米电器科技有限公司 | A kind of acquisition methods of noise of range hood interference device |
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