JP3571475B2

JP3571475B2 - Ventilation fan

Info

Publication number: JP3571475B2
Application number: JP31985496A
Authority: JP
Inventors: 義政伊藤; 伸也高見
Original assignee: Toshiba Carrier Corp
Current assignee: Toshiba Carrier Corp
Priority date: 1996-11-29
Filing date: 1996-11-29
Publication date: 2004-09-29
Anticipated expiration: 2016-11-29
Also published as: JPH10160215A; CN1185545A; CN1096575C; TW384377B; KR19980042075A; KR100270636B1

Description

【０００１】
【発明の属する技術分野】
本発明は化粧枠の通気口を開閉する開閉体を具えた換気扇に関する。
【０００２】
【従来の技術】
従来より、換気扇においては、一般に、本体枠が、例えば円筒状や角筒状の筒部を中央部に具え、この筒部より外方にフランジ部を具える構造で、その筒部の内方にファンモータ及びファンが取付けられている。又、この本体枠には上記フランジ部を覆う化粧枠が取付けられ、この化粧枠に上記ファンが吸引する空気を通す通気口が形成されている。
【０００３】
このような換気扇では、化粧枠の通気口を通して本体枠に具えられたファンやファンモータが見え、外観が良くない。このため、更に、化粧枠の通気口を開閉するパネルや複数枚のルーバ状シャッタといった開閉体が設けられ、通常はこの開閉体を閉鎖状態に保って、上記ファンやファンモータが化粧枠の通気口を通して見えることのないようにしたものが供されている。
【０００４】
このものの場合、開閉体に対して、モータや電磁石等の電動駆動源を主体とする開閉機構が具えられ、これによって、運転時には開閉体を開放させて通気するようになっている。そして、この開閉機構の電動駆動源は上記本体枠のフランジ部の下部に取付けられている。
【０００５】
【発明が解決しようとする課題】
上述の換気扇は多湿環境例えば浴室においても使用される。この場合、本体枠のフランジ部の表面（室内側の面）や開閉機構の電動駆動源の表面には、ことに冬季等の低温時、浴室の水蒸気が冷やされることによって、結露が発生する。そして、それらのうち、本体枠のフランジ部の表面に生じた露は、そのフランジ部の表面を伝って下方へ流れ、開閉機構の電動駆動源部分に至ってその内部に浸入するおそれを有していた。又、開閉機構の電動駆動源の表面に生じた露は、直接、電動駆動源の内部に浸入するおそれを有していた。
【０００６】
本発明は上述の事情に鑑みてなされたものであり、従ってその目的は、浴室等の多湿環境で使用した場合に露が生じても、それが開閉機構の電動駆動源の内部に浸入するおそれのない換気扇を提供するにある。
【０００７】
【課題を解決するための手段】
上記目的を達成するために、本発明の換気扇においては、円筒状の筒部を中央に有すると共に、この筒部より外方に四角形のフランジ部を有する本体枠と、この本体枠の筒部の内方に取付けられたファンモータ及びファンと、前記本体枠の前方に前記フランジ部を覆って着脱可能に取付けられ、中央部に前記ファンが吸引する空気を通すベルマウス状の通気口を有する化粧枠と、この化粧枠の前面部に前後移動可能に支持して設けられ、その前後移動により前記化粧枠の通気口を運転停止状態では閉鎖し、運転中は開放する開閉体と、この開閉体を開閉させる開閉機構とを具備するものにおいて、前記開閉機構を、前記開閉体を常時は前記化粧枠側に寄せて該化粧枠に圧接させることにより前記通気口を閉鎖する状態に保つスプリング等の付勢手段と、プラスチック製の箱状の主体部と、これの開口部を開閉する蓋部とにより形成され、その主体部の下部に条部材導出口を有する駆動源カバーを具え、この駆動源カバーの内部に開閉用モータと、この開閉用モータの出力軸に取付けたレバー、このレバーの先端部に一端部を取付けた金属製の条部材を収納し、その条部材の他端側を前記条部材導出口から下方に導出させて構成され、前記本体枠のフランジ部の上部側方部に取付けた電動駆動源と、この電動駆動源より下方位置に配置され、金属線材から成って、前記筒部に回動可能に支持される軸部と、この軸部の途中部に折曲形成され前記条部材導出口から導出した条部材の先端部が連結されて前記開閉用モータ及び前記レバーによる条部材の引き上げにより前記軸部を回動させるほゞＵ字形のクランク部と、前記筒部の中心部の前部に位置されて前記クランク部の回動に連動して旋回することにより前記開閉体を後方より押して前記付勢手段に抗し前方に移動させ開放させるほゞコ字形の操作アーム部とを有する操作部材とを具備したことを特徴とする。
【０００８】
このものによれば、浴室等の多湿環境で使用した場合、本体枠のフランジ部の表面に露が生じてそれが流下しても、その流下先には開閉機構の電動駆動源が存在しない。又、開閉機構の電動駆動源部分では、その電動駆動源が駆動源カバーに収納されているので、露は駆動源カバーの表面に生じ、電動駆動源の表面に生じることはない。かくして、開閉機構の電動駆動源の内部に露が浸入することが避けられる。
【０００９】
【発明の実施の形態】
以下、本発明の一実施例につき、図面を参照して説明する。
まず図２には換気扇の全体構成を取付状態で示しており、家屋の壁１に貫通状態で設けた通気用のパイプ２に、本体枠３の筒部４を室内側（図中左側）より挿入している。この本体枠３の筒部４は円筒状で、挿入先部分の外周部に複数個（１個のみ図示）の板ばね５を取付部材としてあらかじめ取付けており、この板ばね５をパイプ２の内周面に圧接させて抜け止めをしている。
【００１０】
又、本体枠３の筒部４の挿入先部分の内部には、円環状のモータ取付部６を複数個のリブ６ａで連ねて形成しており、これにファンモータ７を複数個のねじ８によって取付けている。更に、ファンモータ７の回転軸９にはファン１０を取付けて、このファン１０を筒部４内に位置させている。
【００１１】
一方、筒部４の前縁部にはこれより外方に平坦部１１を形成し、更にこの平坦部１１から筒部４と平行に室外側（図中右側）へ延びる段部１２を形成している。又、この段部１２から外方へはフランジ部１３を形成し、このフランジ部１３からは筒部４と平行に室内側へ延びる外周壁部１４を形成している。従って、本体枠３は筒部４を中心に、平坦部１１、段部１２、フランジ部１３、及び外周壁部１４を有するもので、例えばプラスチックによりそれらを一体に形成している。この場合、図１に示すように、平坦部１１と段部１２は円環形であり、フランジ部１３と外周壁部１４は四角形としている。
【００１２】
そして、上記本体枠３のフランジ部１３の上部、中でも上記円環形の平坦部１１及び段部１２との間で広くなった右側の隅部には、後述する開閉体を開閉させる開閉機構１５の電動駆動源である開閉用モータ１６を、電気絶縁材であるプラスチック製の駆動源カバー１７に収納して取付けている。この場合、開閉用モータ１６は詳細にはメカニックモータと称されるもので、途中部に摩擦クラッチ等のトルクリミッタを具えた減速用のギヤトレーンを図３に示すプラスチック製のケース１８に一体に収納して有するものであり、そのケース１８から突出した出力軸１９の先端部にはレバー２０を取付け、更にこのレバー２０の先端部には条部材例えば金属の撚り線から成るワイヤ２１を取付けている。
【００１３】
これに対して、駆動源カバー１７は例えば箱状の主体部２２と、これの開口部を開閉する蓋部２３とを、薄肉のセルフヒンジ部２４で連ねて一体に形成したもので、その主体部２２には、取付孔２５を有する取付部２６と、条部材導出口２７とを隣接させて下部に形成し、更にその条部材導出口２７に向かって下降傾斜する傾斜部２８を、主体部２２の全周にわたる外周リブ２９の右下側部の内外両面に形成している。なお、この傾斜部２８は外周リブ２９の内面のみに形成していても良い。
【００１４】
このほか、駆動源カバー１７の主体部２２には、傾斜部２８の上方に位置して下向きに開口するリード線導出口３０を形成し、内部の左上部及び右下部の対角位置に図４に示す位置決め部材としてのピン３１を突設している。又、この主体部２２の内部の右上部及び左下部の対角位置にはねじ孔３２を形成している。これらに対応して、前記開閉用モータ１６には位置決め孔３３を左上部及び右下部の対角位置に形成し、取付孔３４を右上部及び左下部の対角位置に形成しており、そのうちの位置決め孔３３をそれぞれピン３１に嵌合して位置決めしつつ、開閉用モータ１６を駆動源カバー１７の主体部２２に収納し、取付孔３４をねじ孔３２に合致させている。
【００１５】
そして、その状態で、固定手段であるねじ３５（図３参照）を取付孔３４からねじ孔３２に螺挿して締付け、かくして駆動源カバー１７の主体部２２に収納した開閉用モータ１６の固定をしている。図３はこの開閉用モータ１６の固定状態を示しており、駆動源カバー１７の主体部２２の内周部と開閉用モータ１６の外周部との間には隙間３６が全周に保たれている。すなわち、駆動源カバー１７は、主体部２２の内周部と開閉用モータ１６の外周部との間にその隙間３６が保たれる大きさに形成しているのである。
【００１６】
なお、主体部２２のリード線導出口３０からは開閉用モータ１６のリード線３７を導出させている。更に、主体部２２の条部材導出口２７にはブッシュ収納部３８を形成し、このブッシュ収納部３８に、前記ワイヤ２１を図５にも示すように挿通した例えば円筒状のブッシュ３９を収納している。このブッシュ３９は中心部に上記ワイヤ２１の挿通に供した挿通孔４０を有する円筒状のもので、硬質材例えば金属から成っている。
【００１７】
このようにした状態で、駆動源カバー１７は主体部２２に前記蓋部２３を合わせ、その前後を反転させ（蓋部２３が後側に位置する状態にし）た上で、図１に示すように、前記本体枠３の外周壁部１４の上部右側に形成した止め部である突片４１の裏側に上部を位置させている。そして、更にその状態で、固定手段であるねじ４２を、主体部２２の取付孔２５から、蓋部２３に形成した取付孔４３（図３参照）に通し、前記本体枠３のフランジ部１３の上部に形成したねじ孔（図示せず）に螺挿して締付けており、かくして、本体枠３のフランジ部１３の上部に、駆動源カバー１７と共に開閉用モータ１６を取付けている。
【００１８】
なお、本体枠３のフランジ部１３の上部の中でも左側の隅部には、端子カバー４４を取付けている。この端子カバー４４は、詳しくは図示しないが前記駆動源カバー１７同様に、プラスチック製で、箱状の主体部と、これの開口部を開閉する蓋部とを、薄肉のセルフヒンジ部で連ねて一体に形成したものであり、その内部には、前記ファンモータ７のリード線４５の先端部に設けた接続端子（特には速結端子：電線を挿入するだけでチャックし接続保持するもので、ＳＬ端子ともいう）４６を収納すると共に、前記駆動源カバー１７のリード線導出口３０から導出させて接続端子４６に接続したリード線３７の先端部を収納している。
【００１９】
又、この端子カバー４４の取付けも、前記駆動源カバー１７の取付けと同様に本体枠３の外周壁部１４の上部左側に形成した止め部である突片４７の裏側に上部を位置させることと、下部の取付部４８を固定手段であるねじ４９でフランジ部１３に締付けることとで行っている。
【００２０】
この場合、ファンモータ７のリード線４５は本体枠３のフランジ部１３の下部、中でも左側の隅部に装着した軟質材から成るコードブッシュ５０上の導入孔５１を通してフランジ部１３の裏側より表側（室内側）へ引き込んでいる。又、コードブッシュ５０からは、これに形成した十字状の切目５２を通して図示しない電源電線を同じくフランジ部１３の裏側より表側へ引き込むようにしており、この引き込んだ電源電線の先端部（裸線）を端子カバー４４の外方から図示しない挿入口を通し接続端子４６に挿入して接続することにより、電源電線から接続端子４６、リード線４５並びにリード線３７を通じて、ファンモータ７並びに開閉用モータ１６に通電がなされるようになっている。
【００２１】
一方、前記駆動源カバー１７の条部材導出口２７から導出したワイヤ２１の先端部は、前記開閉機構１５の操作部材５５のほゞＵ字形に折曲形成したクランク部５６に連結している。操作部材５５は金属線材から成るもので、その途中部には上記クランク部５６のほかにほゞコ字形の操作アーム部５７を折曲形成しており、そのほかの部分を上記クランク部５６及び操作アーム部５７に共通の軸部５８としている。この軸部５８は、その一方（図１中右側）の端部を、本体枠３の外周壁部１４の右側内部に取付けた支持具５９によって回動可能に支持し、他方（図１中左側）の端部を、本体枠３の筒部４前縁部の左側部に形成した支持孔６０によって同じく回動可能に支持している。
【００２２】
なお、この場合、本体枠３の平坦部１１の右側部には凹部６１を形成していて、この凹部６１内に上記操作部材５５の軸部５８のうちのクランク部５６近くの部分を位置させることにより、軸部５８が平坦部１１より前方（室内側）に突出することのないようにしている。又、操作部材５５の操作アーム部５７は筒部４の中心部の前部に位置されている。
【００２３】
そして、これら操作部材５５等を取付けた本体枠３の前方には図２に示す化粧枠６２を取付けている。この化粧枠６２はプラスチック製で、本体枠３のフランジ部１３とほゞ同形の平坦部６３を主体部としており、この平坦部６３の外周部に形成した外周壁部６４を、本体枠３の外周壁部１４外側に嵌合して、図示しない係合爪等の係合手段により着脱可能に取付け、本体枠３のフランジ部１３を覆っている。
【００２４】
又、上記化粧枠６２の平坦部６３の中央部にはベルマウス状の通気口６５を形成しており、この通気口６５の左右両側の縁部にはそれぞれ凹欠部６６を形成していて、この凹欠部６６を前記操作部材５５の軸部５８に遊嵌しながら、通気口６５を本体枠３の筒部４内に位置させている。この結果、操作部材５５は操作アーム部５７の先端部を除く部分と操作アーム部５７両側の軸部５８部分とが通気口６５内に位置されている。
【００２５】
更に、この場合、化粧枠６２の通気口６５周囲の部分の裏側には、気密材例えば独立発泡のクッション材から成る円環状のシール部材６７を貼着しており、これを本体枠３の平坦部１１に圧接させて、筒部４と化粧枠３との間に該シール部材６７を挟設している。なお、シール部材６７は、上述とは反対に、本体枠３の平坦部１１に貼着して、これに化粧枠６２の通気口６５周囲の部分の裏側を圧接させるようにしても良い。
【００２６】
又、この場合、シール部材６７が圧接した本体枠３の平坦部１１は、前述のように、凹部６１内に操作部材５５の軸部５８を位置させることにより該軸部５８が平坦部１１より前方（室内側）に突出することのないようにしているから、シール部材６７を操作部材５５の軸部５８に邪魔されず本体枠３の平坦部１１に一様に隙間なく圧接させることができて、後述するシール効果がより確実に得られるようになっている。
【００２７】
化粧枠６２の前面部には装飾パネル６８を設けている。この装飾パネル６８はプラスチック製で、化粧枠６２の前面部のほゞ全面を覆う大きさのものであり、裏面のほゞ全面に防露用の断熱材６９を貼着し、中心部に当て部材７０を設けている。
【００２８】
又、この装飾パネル６８は図示しない案内部材によって化粧枠６２に前後移動可能に支持されており、その前後移動により前記化粧枠６２の通気口６５を開閉する開閉体として機能するようになっている。更に、この装飾パネル６８と化粧枠６２との間には、装飾パネル６８を常時は化粧枠６２側に寄せて該化粧枠６２に圧接させることにより化粧枠６２の通気口６５を閉鎖する状態に保つスプリング等の付勢手段を設けており、その閉鎖状態で、上記当て部材７０の後端面に前記操作部材５５の操作アーム部５７の先端部を位置させている。
【００２９】
なお、前記開閉機構１５は前記開閉用モータ１６、レバー２０、ワイヤ２１、操作部材５５、及び上述のスプリング等の付勢手段によって構成されている。
【００３０】
次に、上記構成のものの作用を述べる。
まず図２に示す運転停止状態から、図示しない電源スイッチをオンさせると、ファンモータ７と開閉機構１５の開閉用モータ１６とが通電されて起動される。このうち、開閉用モータ１６により、出力軸１９が回転されて、レバー２０が図３に矢印Ａで示すように反時計方向に回動され、ワイヤ２１を引き上げる。
【００３１】
このため、操作部材５５が、クランク部５６をワイヤ２１により引き上げられて、軸部５８を中心に図２に矢印Ｂで示すように回動され、操作アーム部５７を同方向に旋回させる。これにより、装飾パネル６８が、当て部材７０を後方より操作アーム部５７に押されて図示しないスプリング等の付勢手段の付勢力に抗し前方へ移動され、化粧枠６２から離間して該化粧枠６２の通気口６５を開放させる。
【００３２】
このとき、装飾パネル６８の移動は図示しないストッパ機構により所定距離に規制されるようになっている。このため、レバー２０の回動は強制的に停止されるが、その後も開閉用モータ１６は通電されたままであり、この状態での開閉用モータ１６の回転は、減速用のギヤトレーン中に存したトルクリミッタが例えばスリップを起こすことにより吸収されるもので、これにより開閉用モータ１６のロックが防止される。
【００３３】
一方、ファンモータ７によってはファン１０が回転され、これにより、室内の空気が上記装飾パネル６８と化粧枠６２との間より化粧枠６２の通気口６５を通じて筒部４内に吸引され、そして、パイプ２を通じ室外に排出されるという換気運転が行われる。
【００３４】
そして、この換気運転状態から、前記電源スイッチをオフさせると、ファンモータ７と開閉機構１５の開閉用モータ１６とが断電されて、ファンモータ７はファン１０の回転駆動を停止し、開閉用モータ１６はレバー２０によるワイヤ２１の引き上げを解除するため、装飾パネル６８が操作部材５５の操作アーム部５７による押圧から解放され、スプリング等の付勢手段の付勢力のままに化粧枠６２側に寄せられて該化粧枠６２に圧接し通気口６５を閉鎖する状態に戻される。
【００３５】
このように本構成のものでは、通常（運転停止状態）では装飾パネル６８で化粧枠６２の通気口６５を閉鎖するもので、これにより、本体枠３内部のファン１０やファンモータ７が化粧枠６２の通気口６５を通して見えることのないようにでき、外観を良くできる。
【００３６】
又、そのための開閉機構１５の開閉用モータ１６はプラスチック製の駆動源カバー１７に収納して、本体枠３のフランジ部１３の上部に取付けている。そのため、浴室等の多湿環境で使用した場合に、室内より本体枠３の外周壁部１４と化粧枠６２の外周壁部６４との合わせ部分の隙間や、化粧枠６２の通気口６５を通じて本体枠３のフランジ部１３と化粧枠６２の平坦部６３との間に水蒸気が入ることにより、本体枠３のフランジ部１３の表面に露が生じてそれが流下しても、その流下先には開閉用モータ１６が存在しないことになり、流下した露が開閉用モータ１６の内部に浸入することが避けられる。なお、この場合、開閉用モータ１６の取付部より更に上方の部分からも露の流下があるが、それはごく僅かであり、開閉用モータ１６の内部に浸入するほどのことはない。
【００３７】
更に、開閉用モータ１６部分では、この開閉用モータ１６が駆動源カバー１７に収納されているので、露は駆動源カバー１７の表面に生じ、開閉用モータ１６の表面に生じることはない（万一生じてもごく僅かである）。かくして、この場合にも、開閉モータ１６の内部には露が浸入することが避けられる。
【００３８】
加えて、上記構成のものでは、本体枠３の筒部４と化粧枠６２との間にシール部材６７を挟設している。これにより、本体枠３のフランジ部１３と化粧枠６２の平坦部６３との間に室内より化粧枠６２の通気口６５を通じて水蒸気が入ることからして防止できるので、本体枠３のフランジ部１３の表面に露が生じにくくでき、開閉用モータ１６の内部に露が浸入することを一層確実に防止できる。
【００３９】
又、この場合、室外より本体枠３の筒部４を通じて本体枠３のフランジ部１３と化粧枠６２の平坦部６３との間に冷たい外風が入ることも防止できるもので、これにより、化粧枠６２の平坦部６３や外周壁部６４の外面に露ができることも防止でき、その垂れ落ち等も防止できるから、ことに居間用として使用する場合に適する。
【００４０】
更に、開閉機構１５が開閉用モータ１６によって操作されるワイヤ２１を有し、このワイヤ２１を通すブッシュ３９をプラスチック製の駆動源カバー１７の条部材導出口２７に設けている。これにより、ワイヤ２１は装飾パネル６８を開閉させるときに直接にはブッシュ３９に摺接し、駆動源カバー１７の条部材導出口２７に直接摺接することがないので、その条部材導出口２７周囲の部分をすり減らしてしまってそこから水蒸気が入りやすくなることを回避でき、開閉用モータ１６の内部に露が浸入することを一層確実に防止できる。
【００４１】
そして、駆動源カバー１７の内周部とこれに収納された開閉用モータ１６の外周部との間には隙間３６が保たれるようにしている。これにより、万一、駆動源カバー１７内に露が生じた場合の、毛細管現象による開閉用モータ１６内への露の浸入まで防止することができる。
【００４２】
又、上記駆動源カバー１７は条部材導出口２７に向かって下降傾斜する傾斜部２８を有している。これにより、上述の万一駆動源カバー１７内に生じた露もその傾斜部に沿って流下させ、条部材導出口２７から駆動源カバー１７外に排出できるので、やはり開閉用モータ１６の内部に露が浸入することを一層確実に防止できる。
【００４３】
なお、上記実施例では電源電線のための接続端子４６もプラスチック製の端子カバー４４に収納して本体枠３のフランジ部１３の上部に取付けているので、上記開閉用モータ１６と同様に露の浸入を防止できるが、これについては、それを必要とするもののみ採用するようにしても良い。
又、上記実施例では本発明を家屋の壁１に設けた通気用のパイプ２に本体枠３の筒部４を挿入して取付けるパイプ用ファンに適用して述べたが、それに限られるものではなく、通常の台所用や居間用等の換気扇にも同様に適用して実施できる。
【００４４】
なお、本発明は上記し且つ図面に示した実施例にのみ限定されるものではなく、要旨を逸脱しない範囲内で適宜変更して実施し得る。
【００４５】
【発明の効果】
本発明は以上説明したとおりのもので、下記の効果を奏する。
請求項１の換気扇によれば、化粧枠の通気口を開閉する開閉体を開閉させる開閉機構の電動駆動源が本体枠のフランジ部の表面に生じる露の流下先に存せず、且つ、電動駆動源の表面に露が生じることもないので、その電動駆動源の内部に露が浸入するおそれをなくすことができる。
【図面の簡単な説明】
【図１】本発明の一実施例を示す化粧カバーを取外した状態での正面図
【図２】取付状態で示す全体の縦断側面図
【図３】主要部分の駆動源カバー蓋開放状態での正面図
【図４】主要部分の駆動源カバー蓋開放状態での分解斜視図
【図５】開閉機構のワイヤ（条部材）と操作部材との連結部分の斜視図
【符号の説明】
３は本体枠、４は筒部、７はファンモータ、１０はファン、１３はフランジ部、１５は開閉機構、１６は開閉用モータ（電動駆動源）、１７は駆動源カバー、２１はワイヤ（条部材）、２７は条部材導出口、２８は傾斜部、３６は隙間、３８はブッシュ収納部、３９はブッシュ、５５は操作部材、５６はクランク部、５７は操作アーム部、６２は化粧枠、６５は通気口、６７はシール部材、６８は装飾パネル（開閉体）、７０は当て部材を示す。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a ventilation fan having an opening / closing body for opening / closing a vent of a decorative frame.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a ventilation fan, a body frame generally has a structure in which, for example, a cylindrical portion or a rectangular cylindrical portion is provided at a central portion, and a flange portion is provided outside the cylindrical portion. , A fan motor and a fan are attached. Further, a decorative frame for covering the flange portion is attached to the main body frame, and a ventilation port for passing air sucked by the fan is formed in the decorative frame.
[0003]
In such a ventilation fan, the fan and the fan motor provided in the main body frame can be seen through the ventilation holes of the decorative frame, and the appearance is not good. For this reason, an opening / closing body such as a panel for opening and closing the ventilation opening of the decorative frame and a plurality of louver-shaped shutters is provided. Usually, the opening / closing body is kept in a closed state, and the fan or the fan motor is used for ventilation of the decorative frame. They are provided so that they cannot be seen through the mouth.
[0004]
In this case, an opening / closing mechanism mainly including an electric drive source such as a motor or an electromagnet is provided for the opening / closing body, so that the opening / closing body is opened and ventilated during operation. The electric drive source of the opening / closing mechanism is attached to a lower portion of the flange of the main body frame.
[0005]
[Problems to be solved by the invention]
The above described ventilation fan is also used in a humid environment such as a bathroom. In this case, dew condensation occurs on the surface of the flange portion of the main body frame (the surface on the indoor side) and the surface of the electric drive source of the opening / closing mechanism, especially when the temperature of the bathroom is low at a low temperature such as winter. Among them, the dew generated on the surface of the flange portion of the main body frame flows downward along the surface of the flange portion, reaches the electric drive source portion of the opening / closing mechanism, and may enter the inside. Was. In addition, dew generated on the surface of the electric drive source of the opening / closing mechanism has a risk of directly entering the inside of the electric drive source.
[0006]
The present invention has been made in view of the above-described circumstances, and accordingly, the object is that even if dew occurs when used in a humid environment such as a bathroom, the dew may enter the electric drive source of the opening / closing mechanism. To provide a fan without ventilation.
[0007]
[Means for Solving the Problems]
To achieve the above object, the ventilation fan of the present invention, as well as have a cylindrical tubular portion in the center, a body frame having a flange portion of the square outward from the cylindrical portion, the cylindrical portion of the body frame of a fan motor and a fan mounted inwardly, removably mounted in front of the front Stories body frame to cover the flange portion, bell-shaped vent through which air before Symbol fan sucks in the central portion A makeup frame having a front and rear portion of the makeup frame which is supported so as to be movable back and forth , and the front and rear movement of which closes the ventilation opening of the makeup frame in a stopped state, and opens and closes during operation , Oite to those and a opening and closing mechanism Ru is opening and closing the opening-the closing mechanism, closing the vent by constantly the closing body is pressed against the said decorative frame Intention to the decorative frame side With springs etc. Means, a plastic box-shaped main body, and a lid for opening and closing the opening of the main body, comprising a drive source cover having a strip member outlet at a lower portion of the main body, comprising a drive source cover. An opening / closing motor, a lever attached to the output shaft of the opening / closing motor, and a metal strip member having one end attached to the distal end of the lever are housed therein, and the other end of the strip member is the strip member. An electric drive source that is configured to be drawn out from the outlet and attached to an upper side portion of the flange portion of the main body frame; and an electric drive source that is disposed below the electric drive source and that is made of a metal wire, A shaft member rotatably supported on the shaft member, and a tip portion of a bar member bent at an intermediate portion of the shaft portion and led out from the bar member outlet, are connected to each other to form a bar member by the opening / closing motor and the lever. The shaft is rotated by pulling up A substantially U-shaped crank portion, which is located at a front portion of a center portion of the cylindrical portion and pivots in conjunction with the rotation of the crank portion, pushes the opening / closing body from behind to oppose the urging means. An operating member having a substantially U-shaped operating arm for moving forward and opening .
[0008]
According to this, when used in a humid environment such as a bathroom, even if dew is generated on the surface of the flange portion of the main body frame and flows down, there is no electric drive source of the opening / closing mechanism at the flow destination. Further, in the electric drive source portion of the opening / closing mechanism, since the electric drive source is housed in the drive source cover, dew is generated on the surface of the drive source cover and does not occur on the surface of the electric drive source. Thus, it is possible to prevent dew from entering the inside of the electric drive source of the opening / closing mechanism.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
First, FIG. 2 shows the entire configuration of the ventilation fan in an attached state, in which a pipe portion 4 of a main body frame 3 is attached to a ventilation pipe 2 provided in a penetrating state on a wall 1 of a house from the indoor side (left side in the figure). Inserted. The tubular portion 4 of the body frame 3 by a circle cylindrical, the insert destination portion is previously attached to the plate spring 5 a plurality (only one shown) as a mounting member to the outer peripheral portion of the plate spring 5 of the pipe 2 It is pressed against the inner peripheral surface to prevent it from falling off.
[0010]
An annular motor mounting portion 6 is formed by connecting a plurality of ribs 6a inside the insertion portion of the cylindrical portion 4 of the main body frame 3, and a fan motor 7 is connected to the plurality of screws 8 by the ribs 6a. Installed by. Further, a fan 10 is attached to the rotating shaft 9 of the fan motor 7, and the fan 10 is located in the cylindrical portion 4.
[0011]
On the other hand, a flat portion 11 is formed on the front edge portion of the cylindrical portion 4 outward from the front portion, and a step portion 12 extending from the flat portion 11 to the outside of the room (right side in the drawing) in parallel with the cylindrical portion 4 is formed. ing. A flange portion 13 is formed outward from the step portion 12, and an outer peripheral wall portion 14 is formed from the flange portion 13 and extends in parallel with the cylindrical portion 4 toward the indoor side. Therefore, the main body frame 3 has a flat portion 11, a step portion 12, a flange portion 13, and an outer peripheral wall portion 14 with the cylindrical portion 4 as a center, and these are integrally formed by, for example, plastic. In this case, as shown in FIG. 1, the flat part 11 and the step part 12 are annular, and the flange part 13 and the outer peripheral wall part 14 are square.
[0012]
An opening / closing mechanism 15 for opening / closing an opening / closing body, which will be described later, is provided at an upper portion of the flange portion 13 of the main body frame 3, in particular, at a right corner widened between the annular flat portion 11 and the step portion 12. An opening / closing motor 16 as an electric drive source is housed and attached to a drive source cover 17 made of plastic, which is an electric insulating material. In this case, the opening / closing motor 16 is what is called a mechanic motor in detail, and a gear train for reduction provided with a torque limiter such as a friction clutch at an intermediate portion is integrally housed in a plastic case 18 shown in FIG. A lever 20 is attached to the distal end of the output shaft 19 protruding from the case 18, and a strip member such as a wire 21 made of a metal stranded wire is attached to the distal end of the lever 20. .
[0013]
On the other hand, the drive source cover 17 is formed by integrally forming, for example, a box-shaped main part 22 and a lid part 23 for opening and closing the opening thereof by a thin self-hinge part 24. In the portion 22, a mounting portion 26 having a mounting hole 25 and a strip member outlet 27 are formed adjacent to each other at a lower portion, and further, an inclined portion 28 which is inclined downward toward the strip member outlet 27 is provided with a main body portion. The outer peripheral rib 29 is formed on both the inner and outer surfaces at the lower right side of the outer peripheral rib 29 over the entire periphery of the outer peripheral rib 22. Note that the inclined portion 28 may be formed only on the inner surface of the outer peripheral rib 29.
[0014]
In addition, a lead wire outlet 30 is formed in the main body portion 22 of the drive source cover 17 and located above the inclined portion 28 and opened downward. A pin 31 as a positioning member shown in FIG. Further, screw holes 32 are formed at diagonal positions on the upper right and lower left inside the main body portion 22. Correspondingly, the opening / closing motor 16 has positioning holes 33 formed at upper left and lower right diagonal positions, and mounting holes 34 formed at upper right and lower left diagonal positions. The opening / closing motor 16 is housed in the main body portion 22 of the drive source cover 17 while fitting the positioning holes 33 to the pins 31 for positioning, and the mounting holes 34 are aligned with the screw holes 32.
[0015]
Then, in this state, a screw 35 (see FIG. 3) serving as a fixing means is screwed into the screw hole 32 from the mounting hole 34 and tightened, thus fixing the opening / closing motor 16 housed in the main body 22 of the drive source cover 17. are doing. FIG. 3 shows the fixed state of the opening / closing motor 16. A gap 36 is maintained on the entire circumference between the inner peripheral portion of the main body 22 of the drive source cover 17 and the outer peripheral portion of the opening / closing motor 16. I have. That is, the drive source cover 17 is formed in such a size that the gap 36 is maintained between the inner peripheral portion of the main body portion 22 and the outer peripheral portion of the opening / closing motor 16.
[0016]
The lead wire 37 of the opening / closing motor 16 is led out from the lead wire outlet 30 of the main body 22. Further, a bush housing portion 38 is formed in the strip member outlet 27 of the main body portion 22, and a bush 39 having, for example, a cylindrical shape, into which the wire 21 is inserted as shown in FIG. ing. The bush 39 has a cylindrical shape having a through hole 40 for inserting the wire 21 at the center, and is made of a hard material such as metal.
[0017]
In this state, the drive source cover 17 is arranged such that the cover 23 is aligned with the main body 22, the front and the back are reversed (the cover 23 is positioned on the rear side), and then as shown in FIG. In addition, the upper part is located on the back side of the projecting piece 41 which is a stopper formed on the upper right side of the outer peripheral wall part 14 of the main body frame 3. Then, in this state, a screw 42 serving as a fixing means is passed from the mounting hole 25 of the main body 22 to a mounting hole 43 (see FIG. 3) formed in the lid portion 23, and the flange portion 13 of the main body frame 3 is formed. A screw hole (not shown) formed in the upper portion is screwed and fastened. Thus, the opening / closing motor 16 is mounted together with the drive source cover 17 on the upper portion of the flange portion 13 of the main body frame 3.
[0018]
A terminal cover 44 is attached to the left corner of the upper portion of the flange portion 13 of the main body frame 3. Although not shown in detail, the terminal cover 44 is made of a plastic box-shaped main body and a lid that opens and closes an opening of the box-shaped main body, like the drive source cover 17, and is connected by a thin self-hinge part. A connection terminal (particularly a quick connection terminal: a connection terminal provided at the tip of the lead wire 45 of the fan motor 7 is chucked and connected and held only by inserting an electric wire, In addition to accommodating the SL terminal 46, the leading end of the lead wire 37 led out from the lead wire outlet 30 of the drive source cover 17 and connected to the connection terminal 46 is housed.
[0019]
Also, the terminal cover 44 is mounted on the rear side of the projecting piece 47 which is a stop formed on the upper left side of the outer peripheral wall portion 14 of the main body frame 3 similarly to the mounting of the drive source cover 17. The lower mounting portion 48 is fastened to the flange portion 13 with a screw 49 as a fixing means.
[0020]
In this case, the lead wire 45 of the fan motor 7 passes through the introduction hole 51 on the cord bush 50 made of a soft material attached to the lower portion of the flange portion 13 of the main body frame 3, especially the left corner portion, from the back side of the flange portion 13 to the front side ( Indoors). A power cable (not shown) is also drawn from the cord bush 50 to the front side from the back side of the flange portion 13 through a cross cut 52 formed in the cord bush 50, and the leading end (bare wire) of the drawn power cable. Is inserted from the outside of the terminal cover 44 through an insertion opening (not shown) into the connection terminal 46, and is connected to the fan motor 7 and the opening / closing motor 16 from the power supply wire through the connection terminal 46, the lead wire 45, and the lead wire 37. Is supplied with electricity.
[0021]
On the other hand, the tip of the wire 21 led out from the strip member outlet 27 of the drive source cover 17 is connected to a crank portion 56 of the operating member 55 of the opening / closing mechanism 15 which is bent in a substantially U shape. The operation member 55 is made of a metal wire, and a substantially U-shaped operation arm 57 is formed in the middle of the operation member 55 in addition to the crank 56. The shaft portion 58 is common to the arm portion 57. This shaft portion 58 is rotatably supported at one end (right side in FIG. 1) by a support 59 mounted inside the right side of the outer peripheral wall portion 14 of the main body frame 3, and the other (left side in FIG. 1). ) Is rotatably supported by a support hole 60 formed on the left side of the front edge of the cylindrical portion 4 of the main body frame 3.
[0022]
In this case, a concave portion 61 is formed on the right side of the flat portion 11 of the main body frame 3, and a portion of the shaft portion 58 of the operation member 55 near the crank portion 56 is located in the concave portion 61. This prevents the shaft portion 58 from protruding forward (inside the room) from the flat portion 11. The operation arm 57 of the operation member 55 is located at the front of the center of the cylinder 4.
[0023]
A decorative frame 62 shown in FIG. 2 is mounted in front of the body frame 3 to which the operation members 55 and the like are mounted. The decorative frame 62 is made of plastic and mainly includes a flat portion 63 having substantially the same shape as the flange portion 13 of the main body frame 3, and an outer peripheral wall portion 64 formed on the outer peripheral portion of the flat portion 63 is attached to the main body frame 3. It is fitted to the outside of the outer peripheral wall portion 14 and is detachably attached by an engaging means such as an engaging claw (not shown) to cover the flange portion 13 of the main body frame 3.
[0024]
A bell mouth-shaped vent 65 is formed at the center of the flat portion 63 of the decorative frame 62, and concave notches 66 are formed at both left and right edges of the vent 65. The vent hole 65 is positioned in the cylindrical portion 4 of the main body frame 3 while the concave portion 66 is loosely fitted to the shaft portion 58 of the operation member 55. As a result, in the operation member 55, the portion excluding the distal end portion of the operation arm portion 57 and the shaft portions 58 on both sides of the operation arm portion 57 are located in the vent 65.
[0025]
Further, in this case, an annular sealing member 67 made of an air-tight material, for example, a closed-cell foam cushion material is adhered to the back side of a portion around the ventilation port 65 of the decorative frame 62, The sealing member 67 is sandwiched between the cylindrical portion 4 and the decorative frame 3 by being pressed against the portion 11. Alternatively, the sealing member 67 may be attached to the flat portion 11 of the main body frame 3, and the back side of the portion around the vent 65 of the decorative frame 62 may be pressed against the flat member 11.
[0026]
In this case, the flat portion 11 of the main body frame 3 to which the sealing member 67 is pressed against is positioned above the flat portion 11 by positioning the shaft portion 58 of the operation member 55 in the concave portion 61 as described above. Since it does not protrude forward (inside of the room), the seal member 67 can be uniformly pressed into the flat portion 11 of the main body frame 3 without any gap without being disturbed by the shaft portion 58 of the operation member 55. Thus, the sealing effect described later can be obtained more reliably.
[0027]
A decorative panel 68 is provided on the front surface of the decorative frame 62. The decorative panel 68 is made of plastic and is large enough to cover almost the entire front surface of the decorative frame 62. A heat insulating material 69 for dew-proofing is attached to almost the entire rear surface of the decorative frame 62, and is applied to the center. A member 70 is provided.
[0028]
The decorative panel 68 is supported by the decorative frame 62 so as to be movable back and forth by a guide member (not shown), and functions as an opening / closing body that opens and closes the vent 65 of the decorative frame 62 by the longitudinal movement. . Further, between the decorative panel 68 and the decorative frame 62, the decorative panel 68 is normally moved toward the decorative frame 62 and pressed against the decorative frame 62 to close the ventilation port 65 of the decorative frame 62. A biasing means such as a retaining spring is provided, and in a closed state, the distal end of the operation arm 57 of the operation member 55 is positioned on the rear end surface of the contact member 70.
[0029]
The opening / closing mechanism 15 includes the opening / closing motor 16, the lever 20, the wire 21, the operating member 55, and biasing means such as the above-described spring.
[0030]
Next, the operation of the above configuration will be described.
First, when a power switch (not shown) is turned on from the operation stop state shown in FIG. 2, the fan motor 7 and the opening / closing motor 16 of the opening / closing mechanism 15 are energized and started. Of these, the output shaft 19 is rotated by the opening / closing motor 16, and the lever 20 is turned counterclockwise as shown by the arrow A in FIG.
[0031]
For this reason, the operating member 55 is pulled up by the wire 21 from the crank portion 56 and is turned around the shaft portion 58 as shown by the arrow B in FIG. 2 to rotate the operating arm portion 57 in the same direction. As a result, the decorative panel 68 is pushed by the operating arm 57 from behind to move the decorative panel 68 forward against the urging force of the urging means such as a spring (not shown). The vent 65 of the frame 62 is opened.
[0032]
At this time, the movement of the decorative panel 68 is restricted to a predetermined distance by a stopper mechanism (not shown). For this reason, the rotation of the lever 20 is forcibly stopped, but the opening / closing motor 16 is still energized thereafter, and the rotation of the opening / closing motor 16 in this state exists in the deceleration gear train. The torque limiter is absorbed, for example, by causing a slip, thereby preventing the opening / closing motor 16 from being locked.
[0033]
On the other hand, the fan 10 is rotated by the fan motor 7, whereby the indoor air is sucked into the cylindrical portion 4 from between the decorative panel 68 and the decorative frame 62 through the vent 65 of the decorative frame 62, and Ventilation operation is performed in which the air is discharged outside the room through the pipe 2.
[0034]
Then, when the power switch is turned off from the ventilation operation state, the fan motor 7 and the opening / closing motor 16 of the opening / closing mechanism 15 are cut off, and the fan motor 7 stops the rotational drive of the fan 10, Since the motor 16 releases the lifting of the wire 21 by the lever 20, the decorative panel 68 is released from being pressed by the operation arm 57 of the operation member 55, and is moved toward the decorative frame 62 with the urging force of the urging means such as a spring. Then, it is brought back into a state of being pressed against the decorative frame 62 and closing the ventilation port 65.
[0035]
As described above, in this configuration, the ventilation port 65 of the decorative frame 62 is normally closed by the decorative panel 68 in the operation stop state, whereby the fan 10 and the fan motor 7 inside the main body frame 3 are closed. It can be prevented from being seen through the ventilation holes 65 of 62, and the appearance can be improved.
[0036]
Further, the opening / closing motor 16 of the opening / closing mechanism 15 is accommodated in a drive source cover 17 made of plastic and mounted on the upper portion of the flange portion 13 of the main body frame 3. Therefore, when used in a humid environment such as a bathroom, the space between the outer peripheral wall portion 14 of the main frame 3 and the outer peripheral wall portion 64 of the decorative frame 62 from the room or through the ventilation port 65 of the decorative frame 62. When water vapor enters between the flange portion 13 of the main frame 3 and the flat portion 63 of the decorative frame 62, dew is generated on the surface of the flange portion 13 of the main body frame 3 and even if it flows down, the flow destination is opened and closed. The motor 16 does not exist, so that the dew that has flowed down can be prevented from entering the inside of the motor 16. In this case, dew flows down from a portion further above the mounting portion of the opening / closing motor 16, but the flow is very small and does not enter the inside of the opening / closing motor 16.
[0037]
Further, in the opening / closing motor 16, since the opening / closing motor 16 is housed in the drive source cover 17, dew is generated on the surface of the drive source cover 17, and is not generated on the surface of the open / close motor 16. It is very slight even if it occurs.) Thus, also in this case, it is possible to prevent dew from entering the inside of the opening / closing motor 16.
[0038]
In addition, in the above configuration, the seal member 67 is interposed between the cylindrical portion 4 of the main body frame 3 and the decorative frame 62. Thereby, water vapor can be prevented from entering the room through the ventilation port 65 of the decorative frame 62 between the flange portion 13 of the main frame 3 and the flat portion 63 of the decorative frame 62, so that the flange portion 13 of the main frame 3 can be prevented. The dew can hardly be generated on the surface of the motor, and the dew can be more reliably prevented from entering the inside of the opening / closing motor 16.
[0039]
In this case, it is also possible to prevent cold outside air from entering between the flange portion 13 of the main body frame 3 and the flat portion 63 of the decorative frame 62 from outside through the cylindrical portion 4 of the main body frame 3. It is possible to prevent dew from forming on the outer surface of the flat portion 63 and the outer peripheral wall portion 64 of the frame 62, and to prevent dripping of the outer surface. Therefore, it is suitable especially for use in a living room.
[0040]
Further, the opening / closing mechanism 15 has a wire 21 operated by the opening / closing motor 16, and a bush 39 for passing the wire 21 is provided at the strip member outlet 27 of the drive source cover 17 made of plastic. Accordingly, when the decorative panel 68 is opened and closed, the wire 21 directly contacts the bush 39 and does not directly contact the strip member outlet 27 of the drive source cover 17. It is possible to avoid that the portion is worn down and that water vapor easily enters therefrom, and it is possible to more reliably prevent dew from entering the inside of the opening / closing motor 16.
[0041]
A gap 36 is kept between the inner peripheral portion of the drive source cover 17 and the outer peripheral portion of the opening / closing motor 16 housed therein. Thus, in the event that dew occurs in the drive source cover 17, it is possible to prevent the dew from entering the opening / closing motor 16 due to the capillary phenomenon.
[0042]
The drive source cover 17 has an inclined portion 28 that is inclined downward toward the strip member outlet 27. As a result, the dew generated in the drive source cover 17 described above can flow down along the inclined portion and can be discharged out of the drive source cover 17 from the strip member outlet port 27. Dew can be more reliably prevented from entering.
[0043]
In the above embodiment, the connection terminal 46 for the power supply wire is also housed in the plastic terminal cover 44 and attached to the upper part of the flange portion 13 of the main body frame 3. Although infiltration can be prevented, only those that require it may be adopted.
In the above embodiment, the present invention is applied to a pipe fan in which the tubular portion 4 of the main body frame 3 is inserted into and attached to the ventilation pipe 2 provided on the wall 1 of the house. However, the present invention can be similarly applied to a ventilation fan for a normal kitchen or a living room.
[0044]
It should be noted that the present invention is not limited to the embodiment described above and shown in the drawings, and may be implemented with appropriate modifications without departing from the scope of the invention.
[0045]
【The invention's effect】
The present invention is as described above, and has the following effects.
According to the ventilation fan of the first aspect, the electric drive source of the opening / closing mechanism for opening / closing the opening / closing body for opening / closing the ventilation opening of the decorative frame does not exist at the destination of the dew flowing on the surface of the flange portion of the main body frame, and the electric motor is electrically driven. Since dew does not occur on the surface of the drive source, it is possible to eliminate the possibility that dew enters the inside of the electric drive source.
[Brief description of the drawings]
FIG. 1 is a front view of a state in which a decorative cover is removed according to an embodiment of the present invention. FIG. 2 is an overall vertical side view showing an installed state. FIG. FIG. 4 is an exploded perspective view of a main part with a drive source cover lid opened. FIG. 5 is a perspective view of a connecting portion between a wire (strip member) of an opening / closing mechanism and an operation member.
3 is a body frame, 4 is a cylinder, 7 is a fan motor, 10 is a fan, 13 is a flange, 15 is an opening / closing mechanism, 16 is an opening / closing motor (electric drive source), 17 is a drive source cover, and 21 is a wire ( , 27 is an inclined portion, 36 is a gap, 38 is a bush storage portion, 39 is a bush, 55 is an operation member, 56 is a crank portion, 57 is an operation arm portion, and 62 is a decorative frame. , 65 denotes a vent, 67 denotes a seal member, 68 denotes a decorative panel (opening / closing body), and 70 denotes a contact member.

Claims

A main body frame having a cylindrical tubular portion at the center and having a square flange portion outside the tubular portion,
A fan motor and a fan mounted inside the cylindrical portion of the body frame;
A decorative frame which is detachably attached to the front of the main body frame so as to cover the flange portion, and has a bell mouth-shaped ventilation opening through which air sucked by the fan is provided at a central portion ;
An opening / closing body which is provided so as to be movable back and forth on the front portion of the decorative frame, and which closes the ventilation opening of the decorative frame when the operation is stopped and opens during the operation by the longitudinal movement .
In those and a opening and closing mechanism Ru is opening and closing the opening-
The opening and closing mechanism,
Biasing means such as a spring that keeps the ventilation port closed by always bringing the opening and closing body toward the decorative frame side and pressing against the decorative frame;
A drive source cover is formed by a plastic box-shaped main body and a lid for opening and closing the opening of the main body. The drive source cover has a strip member outlet at the lower part of the main body. Motor, a lever attached to the output shaft of the opening / closing motor, and a metal strip member having one end attached to the tip of the lever, and the other end of the strip member is inserted from the strip member outlet. An electric drive source configured to be led out downward and attached to an upper side portion of a flange portion of the main body frame;
A shaft portion, which is disposed below the electric drive source and is made of a metal wire, is rotatably supported by the cylindrical portion, and is bent at an intermediate portion of the shaft portion and led out from the strip member outlet. A substantially U-shaped crank portion to which the leading end of the strip member is connected and the shaft portion is rotated by pulling up the strip member by the opening / closing motor and the lever, and a front portion of a center portion of the cylindrical portion. And an operating member having a substantially U-shaped operating arm portion that pushes the opening / closing body from behind by moving in conjunction with the rotation of the crank portion to move forward and open against the urging means. A ventilation fan comprising: