JP2954069B2 - Resonant sound prevention device - Google Patents
Resonant sound prevention deviceInfo
- Publication number
- JP2954069B2 JP2954069B2 JP6974797A JP6974797A JP2954069B2 JP 2954069 B2 JP2954069 B2 JP 2954069B2 JP 6974797 A JP6974797 A JP 6974797A JP 6974797 A JP6974797 A JP 6974797A JP 2954069 B2 JP2954069 B2 JP 2954069B2
- Authority
- JP
- Japan
- Prior art keywords
- vibration
- motor
- rotation
- cover
- resonance
- 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.)
- Expired - Fee Related
Links
Landscapes
- Accessory Devices And Overall Control Thereof (AREA)
- Vibration Prevention Devices (AREA)
- Casings For Electric Apparatus (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は共振音防止装置に関
し、特にモータなどの振動源を内蔵したＯＡ機器などに
おいて振動源に共振して発生する共振音の防止装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resonance sound preventing device, and more particularly to a device for preventing resonance sound generated by resonating with a vibration source in an OA device having a vibration source such as a motor.
【０００２】[0002]
【従来の技術】ＯＡ機器、例えばパーソナルコンピュー
タあるいは複写機などは、静かな室内で使用する場合が
多く、その使用環境からいって低騒音が必須条件であ
る。騒音の発生源は一般にモータなどの回転機である
が、この場合モータ自体から発生する騒音とモータの振
動が付近の構造体に伝達されて発生する振動音とがあ
る。2. Description of the Related Art OA equipment such as a personal computer or a copying machine is often used in a quiet room, and low noise is an essential condition in view of the usage environment. The source of the noise is generally a rotating machine such as a motor. In this case, there is a noise generated from the motor itself and a vibration sound generated by transmitting the vibration of the motor to a nearby structure.
【０００３】前者のモータ自体から発生する騒音に対し
ては、発生源をカバーなどで密閉し遮蔽するするのが一
般的な方法である。例えば特開昭５９−２３３６２号公
報に記載された方法は、カバーで騒音源を密閉するが、
特に低周波の騒音に対してカバーに吸音箱体を設けて遮
蔽している。[0003] It is a general method to shield the source of noise generated by the motor itself by sealing it with a cover or the like. For example, in the method described in JP-A-59-23362, a noise source is sealed with a cover.
In particular, a low-frequency noise is shielded by providing a sound-absorbing box in the cover.
【０００４】また、後者の振動に対しては振動源のモー
タ部とこれを直結する構造体との結合部に制振材を挟ん
で防振するのが一般的方法である。この振動音は振動源
の振動数と振動する構造部材の固有振動数とが一致した
時に発生する共振音が大きな騒音となり問題となる。例
えば、特開平５−３２３６８４号公報に記載された方法
は、特に制振材に制振鋼板を用いてモータの振動がここ
で充分に減衰して構造体に伝達されないようにし共振音
を防止したものである。It is a general method for the latter vibration to interpose a vibration damping material at a joint between a motor part of a vibration source and a structure directly connected to the motor part to prevent the vibration. This vibration sound is a problem because the resonance sound generated when the vibration frequency of the vibration source and the natural frequency of the vibrating structural member coincide with each other becomes a loud noise. For example, the method described in Japanese Patent Application Laid-Open No. Hei 5-323684 uses a damping steel plate as a damping material, so that the vibration of the motor is sufficiently attenuated here so as not to be transmitted to the structure, thereby preventing resonance noise. Things.
【０００５】[0005]
【発明が解決しようとする課題】このように従来例で
は、モータなどの騒音源をカバーおよび吸音箱などで密
閉して遮蔽したり、あるいは制振材を用いて構造体に伝
達する振動を減衰させたりして騒音を防止しているが、
何れも完全に騒音を無くすことは困難である。As described above, in the conventional example, a noise source such as a motor is closed and sealed by a cover and a sound absorbing box, or a vibration transmitted to a structure is damped by using a damping material. To prevent noise,
In any case, it is difficult to completely eliminate noise.
【０００６】特に振動音は制振材などで振動を減衰させ
ても、この減衰して伝達された振動の振動数と構造体の
固有振動数とが一致した時に共振して増幅発生する共振
音は完全に防止することができない。In particular, even when the vibration sound is attenuated by a damping material or the like, the resonance sound resonates and is amplified when the frequency of the attenuated and transmitted vibration coincides with the natural frequency of the structure. Cannot be completely prevented.
【０００７】構造体（例えば機器の表面カバー）の固有
振動数はその構造体の取付ネジの締め付けトルク、周辺
の内部構造体との接触状態，あるいは外部機器との接触
状態などで変化するものである。従って、この共振によ
る振動音は制振材などで一時的に防止したとしても、こ
れらの条件が変化すれば再び発生するので完全に防音す
ることが困難であるという問題がある。The natural frequency of a structure (for example, a surface cover of a device) varies depending on the tightening torque of a mounting screw of the structure, a state of contact with a surrounding internal structure, or a state of contact with an external device. is there. Therefore, even if the vibration noise due to the resonance is temporarily prevented by a damping material or the like, it is difficult to completely prevent the sound from being generated again if these conditions change.
【０００８】[0008]
【課題を解決するための手段】本発明の共振防止装置
は、モータなどの振動源の振動に共振して共振音を発っ
する構造部材の振動レベルを検出してこの値を示す検出
信号を出力する振動検出部と、前記検出信号の値が所定
の基準値を超えた時に制御信号を出力する電子回路と、
この制御信号により回転を開始する制御用モータと、前
記制御用モータの回転軸に取付けられ回転数を下げる減
速機構と、この減速機構を介し取付けられ前記制御用モ
ータの回転に従って前記構造部材の表面を徐々に圧接す
るカム機構とを備えている。Resonance prevention device of the present invention SUMMARY OF THE INVENTION, the detection indicating the value by detecting the vibration level of the structural members which resonate with the vibration of the vibration source such as a motor to after leaving the resonant sound
A vibration detection unit that outputs a signal, and a value of the detection signal is predetermined.
An electronic circuit that outputs a control signal when the reference value exceeds
A control motor for starting rotation by this control signal;
Attached to the rotating shaft of the control motor to reduce the number of rotations
Speed mechanism and the control mode mounted via the speed reduction mechanism.
Gradually presses the surface of the structural member as the rotor rotates
And a cam mechanism .
【０００９】[0009]
【００１０】[0010]
【００１１】[0011]
【００１２】[0012]
【発明の実施の形態】次に本発明の実施の形態について
図面を参照して説明する。図１は本発明の実施の形態例
を示すブロック、図２は図１の部分斜視図、図３は図１
の動作を説明する断面図である。Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a partial perspective view of FIG. 1, and FIG.
FIG. 4 is a cross-sectional view illustrating the operation of FIG.
【００１３】図１および図２において、本図はモータ
（図示せず）などの振動源を内蔵した機器本体部７とカ
バー部６とで構成するＯＡ機器に本共振防止装置を装着
した例を示す。本共振防止装置は、カバー部６の側面に
取付けられた振動センサー１と、このセンサー出力１０
１のレベルが所定の基準値を超えた時に制御信号１０２
を出力する電子回路２と、機器本体部７に取付けられた
制御信号１０２で回転する制御用モータ３と、この制御
用モータ３の回転数を下げる減速部４と、この減速部４
に取付けられ制御モータ３の回転と共にカバー部６の一
部を徐々に圧接を強めて行くカム５とで構成している。FIGS. 1 and 2 show an example in which the present resonance preventing device is mounted on an OA device composed of a device main body 7 having a built-in vibration source such as a motor (not shown) and a cover portion 6. Show. The resonance preventing device includes a vibration sensor 1 attached to a side surface of a cover 6 and a sensor output 10.
1 when the level of the control signal 1 exceeds a predetermined reference value.
, A control motor 3 that is rotated by a control signal 102 attached to the device body 7, a reduction unit 4 that reduces the number of revolutions of the control motor 3,
And a cam 5 that gradually increases the pressure contact of a part of the cover 6 with the rotation of the control motor 3.
【００１４】次に、この共振音防止装置の動作について
説明する。振動センサー１はモータなどの振動源の振動
に共振して振動するカバー部６に取付けられており、こ
の振動の振幅を電気的アナログ量で検出して検出信号１
０１を出力する。電気回路部２はこの検出信号１０１の
振幅レベルと内部の基準電圧とを比較し、検出信号１０
１のレベルがこれを超えた時に制御信号１０２を出力す
る。即ち、カバー部６が振動源の振動数と共振した場
合、この振動レベルが所定値を超えた時に制御信号１０
２が出力される。Next, the operation of the resonance sound preventing apparatus will be described. The vibration sensor 1 is attached to a cover section 6 which vibrates in resonance with vibration of a vibration source such as a motor.
01 is output. The electric circuit unit 2 compares the amplitude level of the detection signal 101 with the internal reference voltage, and
When the level of 1 exceeds this, the control signal 102 is output. That is, when the cover unit 6 resonates with the vibration frequency of the vibration source, the control signal 10 is output when the vibration level exceeds a predetermined value.
2 is output.
【００１５】この電子回路部２と制御用モータ３などは
機器本体部７のシャーシなどに取付けられている。制御
信号１０１により制御用モータ３は回転を始める。この
回転は減速部４で減速されて減速側の回転軸に取付けら
れたカム５に伝達される。カム５は徐々に回転して行
き、先ず回転軸に対し短い距離にある側面がカバー部６
の側面に接触し、回転と共にこの接触を強めて行く。こ
の動作の様子は図３に示す通りである。図３（ａ）はカ
ム５がカバー部６に接触した状態を示し、（ｂ）は制御
用モータ３の回転と共に接触を強めて行く様子を示す。The electronic circuit section 2 and the control motor 3 are mounted on a chassis of the apparatus main body section 7 or the like. The control motor 3 starts rotating according to the control signal 101. This rotation is reduced by the reduction unit 4 and transmitted to the cam 5 attached to the rotation shaft on the reduction side. The cam 5 rotates gradually, and first, the side surface at a short distance from the rotation axis is
Touches the side of the wing and strengthens this contact with rotation. This operation is as shown in FIG. FIG. 3A shows a state in which the cam 5 contacts the cover portion 6, and FIG. 3B shows a state in which the contact is strengthened with the rotation of the control motor 3.
【００１６】カバー部６の固有振動数はこのカム５の接
触の強さで変化するので、カム５がカバー部６との接触
を強めて行くと、振動源のモータの振動数との振動数差
が広がり共振状態から逸脱して共振音がおさまる。この
共振音がおさまることにより振動センサー１の検出信号
１０１のレベルは低下し、制御信号１０２は停止して制
御用モータ３は回転を止める。従って、カム５は共振を
止めた状態の位置で停止する。Since the natural frequency of the cover 6 changes depending on the strength of the contact with the cam 5, as the contact of the cam 5 with the cover 6 increases, the frequency of the vibration relative to the frequency of the vibration source motor increases. The difference widens and deviates from the resonance state, and the resonance sound subsides. When the resonance sound stops, the level of the detection signal 101 of the vibration sensor 1 decreases, the control signal 102 stops, and the control motor 3 stops rotating. Therefore, the cam 5 stops at the position where the resonance has stopped.
【００１７】また、カバー部６の固有振動数が機器の設
置条件などで変化して再び共振した場合、制御用モータ
３が回転を始め、一回転して再び接触を強めて行き共振
逸脱点を探がして振動音を止める。If the natural frequency of the cover 6 changes due to the installation conditions of the equipment and re-oscillates, the control motor 3 starts to rotate, makes one rotation and strengthens the contact again to go to the resonance deviating point. Search and stop the vibration sound.
【００１８】尚、本実施例ではカバー部６の固有振動数
をカム機構により変化させるようにしているが、カム機
構の変りに制御用モータ３の回転動作をシャフトの往復
運動に代え、このシャフト先端に取付けた制振材などを
用いた部材によりカバー部６を圧接して行きこの固有振
動数を変化させるようにしても良い。In this embodiment, the natural frequency of the cover 6 is changed by the cam mechanism. Instead of the cam mechanism, the rotation of the control motor 3 is replaced by the reciprocating motion of the shaft. The natural frequency may be changed by pressing the cover 6 with a member using a damping material or the like attached to the tip.
【００１９】[0019]
【発明の効果】以上説明したように本発明のＯＡ機器
は、モータなどの振動源の振動に共振して振動するカバ
ーなどの側面に振動センサーを取付け、この検出出力で
振動するカバーの側面をカムなどで圧接することにより
カバーの固有振動を変化させて共振音を自動的に停止さ
せているので完全に共振音を防止することができ、特に
ＯＡ機器の設置条件などによりカバーの固有振動数が変
化し再び共振音が発生した場合でも再び共振音を完全に
防止することができるという効果がある。As described above, in the OA device of the present invention, a vibration sensor is attached to the side of a cover or the like that resonates with the vibration of a vibration source such as a motor, and the side of the cover that vibrates with this detection output is attached. The resonance sound is automatically stopped by changing the natural vibration of the cover by pressing with a cam etc., so that the resonance sound can be completely prevented. Especially, the natural frequency of the cover depends on the installation conditions of the OA equipment, etc. Is changed, and the resonance sound is generated again, so that the resonance sound can be completely prevented again.
【図１】本発明の実施の形態例を示すブロック図であ
る。FIG. 1 is a block diagram showing an embodiment of the present invention.
【図２】図１の構造を示す部分斜視図である。FIG. 2 is a partial perspective view showing the structure of FIG.
【図３】図１の動作を説明する（ａ）制御初期状態の断
面図、（ｂ）制御完了状態の断面図である。FIGS. 3A and 3B are cross-sectional views illustrating an operation of FIG. 1 in an initial state of control, and FIG.
１ 振動センサー ２ 電子回路部 ３ 制御用モータ ４ 減速部 ５ カム ６ カバー部 ７ 機器本体部 DESCRIPTION OF SYMBOLS 1 Vibration sensor 2 Electronic circuit part 3 Control motor 4 Reduction part 5 Cam 6 Cover part 7 Device main body part
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) F16F 1/00 - 6/00 F16F 15/00 - 15/32 B41J 29/08 G05D 19/02 H05K 5/02 Continuation of the front page (58) Field surveyed (Int. Cl. 6 , DB name) F16F 1/00-6/00 F16F 15/00-15/32 B41J 29/08 G05D 19/02 H05K 5/02
Claims (1)
振音を発っする構造部材の振動レベルを検出してこの値
を示す検出信号を出力する振動検出部と、前記検出信号
の値が所定の基準値を超えた時に制御信号を出力する電
子回路と、この制御信号により回転を開始する制御用モ
ータと、前記制御用モータの回転軸に取付けられ回転数
を下げる減速機構と、この減速機構を介し取付けられ前
記制御用モータの回転に従って前記構造部材の表面を徐
々に圧接するカム機構とを備えることを特徴とする共振
音防止装置。1. A vibration level of a structural member that emits a resonance sound by resonating with the vibration of a vibration source such as a motor is detected and the value is detected.
A vibration detection unit that outputs a detection signal indicating
Output a control signal when the value exceeds a predetermined reference value.
And a control circuit for starting rotation by the control signal.
And the rotation speed attached to the rotation shaft of the control motor.
The speed reduction mechanism that lowers
The surface of the structural member is gradually reduced according to the rotation of the control motor.
Resonant sound preventing device, characterized in that it comprises a cam mechanism that presses people to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6974797A JP2954069B2 (en) | 1997-03-24 | 1997-03-24 | Resonant sound prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6974797A JP2954069B2 (en) | 1997-03-24 | 1997-03-24 | Resonant sound prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10267074A JPH10267074A (en) | 1998-10-06 |
| JP2954069B2 true JP2954069B2 (en) | 1999-09-27 |
Family
ID=13411713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6974797A Expired - Fee Related JP2954069B2 (en) | 1997-03-24 | 1997-03-24 | Resonant sound prevention device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2954069B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869247B (en) * | 2018-07-25 | 2023-10-13 | 珠海格力电器股份有限公司 | Vibration reduction method and system for compressor and electrical product comprising system |
-
1997
- 1997-03-24 JP JP6974797A patent/JP2954069B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10267074A (en) | 1998-10-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4000217B2 (en) | Microphone | |
| JP2530779B2 (en) | Noise reduction device | |
| JP2954069B2 (en) | Resonant sound prevention device | |
| US5805714A (en) | Noise suppressor in image forming apparatus and noise suppressing method | |
| JP2785616B2 (en) | Silent driving system | |
| US6283637B1 (en) | Method for detuning the natural frequency of a rotatable part as well as a tunable rotatable part | |
| EP2025966A2 (en) | Motor fixing structure and motor assembly | |
| JP3526613B2 (en) | Silencer for information processing equipment | |
| JPH04262076A (en) | Support device for horizontal rotary compressor | |
| JP2580778Y2 (en) | Noise reduction device for electric motor | |
| JPH0678492A (en) | Noise reducing device | |
| KR20050074065A (en) | Vibration reduction apparatus and method for compressor | |
| JP3102350B2 (en) | Engine crank pulley mounting structure | |
| JP2006323176A (en) | Noise control system and noise control method | |
| JPH10208462A (en) | Mounting structure for information processing unit | |
| JP2003144977A (en) | Centrifuge | |
| JPH06159483A (en) | Gear transmission | |
| JPH0510855A (en) | Drum of chassis dynamometer | |
| JPH0615503Y2 (en) | Resonance prevention structure for fan motor | |
| JPH0718170Y2 (en) | Crystal oscillator | |
| JPH11102192A (en) | Soundproof structure | |
| JP2003043861A (en) | Photoreceptor driving unit | |
| JPH06158747A (en) | Sound insulating device | |
| JPS5935856Y2 (en) | Motor mounting structure | |
| KR100559390B1 (en) | Damping control device of vehicle and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19990629 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070716 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080716 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090716 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100716 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110716 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110716 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120716 Year of fee payment: 13 |
|
| LAPS | Cancellation because of no payment of annual fees |