JP5223455B2

JP5223455B2 - Blower

Info

Publication number: JP5223455B2
Application number: JP2008133858A
Authority: JP
Inventors: 英樹林; 隆善松本; 将司田口; 隆一中村; 修二松原
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 2008-05-22
Filing date: 2008-05-22
Publication date: 2013-06-26
Anticipated expiration: 2028-05-22
Also published as: JP2009281266A

Description

本発明は、工具等を用いずに容易に羽根を着脱できる送風機に関する。 The present invention relates to a blower in which a blade can be easily attached and detached without using a tool or the like.

従来のこの種の送風機においては、羽根の回転軸への着脱を、羽根を回転軸に嵌めて押し付けることにより取り付け、また、指で挟む操作により回転軸への保持を解除して取り外すものが知られている（例えば、特許文献１参照）。 In this type of conventional blower, it is known that the blade is attached to or detached from the rotating shaft by fitting the blade onto the rotating shaft and pressing it, and the operation to pinch with the finger releases the holding on the rotating shaft. (For example, refer to Patent Document 1).

以下、その羽根の着脱装置について、図９および図１０を参照しながら説明する。 Hereinafter, the blade attaching / detaching device will be described with reference to FIGS. 9 and 10.

図９および図１０に示すように、電動機の回転軸１０１には、羽根１０２のブレード部１０３に設けたボス部１０４の係合部１０５が係合して回り止めとなる羽根回り止め部１０６と、凹溝１０７とを設けている。 As shown in FIGS. 9 and 10, the rotating shaft 101 of the electric motor is engaged with the engaging portion 105 of the boss portion 104 provided on the blade portion 103 of the blade 102 to prevent the rotation of the blade rotation preventing portion 106. The groove 107 is provided.

また、ブレード部１０３には、凹溝１０７に係合し保持される保持部１０８と、押圧部１０９とで回転軸１０１を囲むようにほぼＵ字状に形成した羽根ロック部１１０を、対向するように一対設けている。 Further, the blade portion 103 is opposed to a blade lock portion 110 formed in a substantially U shape so as to surround the rotating shaft 101 by a holding portion 108 engaged and held in the concave groove 107 and a pressing portion 109. A pair is provided.

上記構成により、羽根１０２を回転軸１０１に取り付けるときは、ボス部１０４を回転軸１０１に嵌め、ボス部１０４に設けた係合部１０５を回転軸１０１に設けた羽根周り止め部１０６に係合させる。 With the above configuration, when the blade 102 is attached to the rotating shaft 101, the boss 104 is fitted to the rotating shaft 101, and the engaging portion 105 provided on the boss 104 is engaged with the blade rotation stopper 106 provided on the rotating shaft 101. Let

また、この時、回転軸１０１の先端部分により、一対の羽根ロック部１１０の保持部１０８が開かれ、次に回転軸１０１の凹溝１０７が、一対の保持部１０８の弾性力で挟持されることにより、羽根１０２が取り付けられる。 At this time, the holding portion 108 of the pair of blade lock portions 110 is opened by the tip portion of the rotating shaft 101, and the concave groove 107 of the rotating shaft 101 is then sandwiched by the elastic force of the pair of holding portions 108. Thus, the blade 102 is attached.

また、羽根１０２を取り外す時には、押圧部１０９を指先で内方側に向け押圧する。 Moreover, when removing the blade | wing 102, the press part 109 is pressed toward an inward side with a fingertip.

すると、押圧部１０９と一体に設けられた一対の保持部１０８が回転軸１０１の凹溝１０７から離れる方向に移動するので、羽根１０２を容易に取り外すことができる。
特開２００４−１２４７８２号公報（第３頁、図１，２） Then, since the pair of holding portions 108 provided integrally with the pressing portion 109 moves away from the concave groove 107 of the rotating shaft 101, the blade 102 can be easily removed.
JP 2004-124782 A (page 3, FIGS. 1 and 2)

このような従来の送風機は、たとえば、パイプ用換気扇の羽根のように小さくて軽い羽根の場合は、回転軸１０１への保持力が長期間にわたって確保されるが、天井埋込形換気扇に組み込まれる遠心送風機の羽根のように、大きさおよび構造上、重量が大きくなるものは、長期間、回転軸１０１が垂直になる方向に設置されると、羽根ロック部１１０の保持力が徐々に低下し、場合によっては、羽根１０２が回転軸１０１から外れて落下してしまうおそれがある。 In the case of such a conventional blower, for example, in the case of a small and light blade such as a blade of a pipe ventilation fan, the holding force to the rotating shaft 101 is ensured for a long period of time. When the rotating shaft 101 is installed in a direction in which the rotating shaft 101 becomes vertical for a long time, such as a blade of a centrifugal blower, which has a large size and structure, the holding force of the blade lock unit 110 gradually decreases. In some cases, the blades 102 may fall off the rotating shaft 101 and fall.

すなわち、羽根１０２の掃除のために容易に着脱できる構造にするためには、例えば上記従来例では保持部１０８には弾性力を持たせるが、このように弾性力を利用するものでは、長期使用のうちに、羽根１０２が回転軸１０１から外れて脱落する可能性が高くなる。 That is, in order to make a structure that can be easily attached and detached for cleaning the blades 102, for example, in the above-described conventional example, the holding portion 108 is given an elastic force. Among them, the possibility that the blades 102 are detached from the rotating shaft 101 and dropped is increased.

そこで本発明は、羽根の脱落防止を図ることを目的とするものである。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to prevent vanes from falling off.

そしてこの目的を達成するために本発明は、回転軸を有する電動機と、この電動機の回転軸が挿入されるボス部を有する羽根と、この羽根の前記回転軸に対する着脱操作を行う着脱手段とを備え、前記着脱手段は、前記羽根を回転軸に保持させる保持力を生じさせる保持手段と、この保持手段による前記保持力を解除する解除手段とを有し、この着脱手段の保持手段が、前記保持力の解除方向へ移動するのを抑制する脱落防止保証手段を設け、この脱落防止保証手段は、前記保持手段を回転軸方向に付勢する構成とし、これにより所期の目的を達成するものである。 In order to achieve this object, the present invention includes an electric motor having a rotating shaft, a blade having a boss portion into which the rotating shaft of the electric motor is inserted, and an attaching / detaching means for performing an attaching / detaching operation of the blade to the rotating shaft. The attaching / detaching means includes a holding means for generating a holding force for holding the blades on the rotation shaft, and a releasing means for releasing the holding force by the holding means. A drop-off prevention guarantee means that suppresses movement in the release direction of the holding force is provided, and this drop-off prevention guarantee means is configured to bias the holding means in the direction of the rotation axis, thereby achieving the intended purpose. It is.

以上のように本発明は、回転軸を有する電動機と、この電動機の回転軸が挿入されるボス部を有する羽根と、この羽根の前記回転軸に対する着脱操作を行う着脱手段とを備え、前記着脱手段は、前記羽根を回転軸に保持させる保持力を生じさせる保持手段と、この保持手段による前記保持力を解除する解除手段とを有し、この着脱手段の保持手段が、前記保持力の解除方向へ移動するのを抑制する脱落防止保証手段を設け、この脱落防止保証手段は、前記保持手段を回転軸方向に付勢する構成としたものであるので、羽根の脱落防止に対する信頼性を高めることが出来るものとなる。 As described above, the present invention includes an electric motor having a rotating shaft, a blade having a boss portion into which the rotating shaft of the electric motor is inserted, and an attaching / detaching means for performing an attaching / detaching operation of the blade with respect to the rotating shaft. The means has a holding means for generating a holding force for holding the blade on the rotation shaft, and a releasing means for releasing the holding force by the holding means, and the holding means of the attaching / detaching means releases the holding force. A drop-off prevention guarantee means that suppresses movement in the direction is provided, and this drop-off prevention guarantee means is configured to bias the holding means in the direction of the rotation axis, so that the reliability for prevention of blade drop-off is improved. It will be possible.

すなわち、本発明では、着脱手段の保持手段が、保持力の解除方向へ移動するのを抑制する脱落防止保証手段を設けたものであるので、保持手段が保持力の解除方向へ移動するのを抑制することができ、その結果として羽根の脱落防止に対する信頼性を高めることが出来るのである。 That is, in the present invention, since the holding means of the attaching / detaching means is provided with the drop-off preventing guarantee means for suppressing the movement of the holding means in the releasing direction of the holding force, the holding means moves in the releasing direction of the holding force. As a result, it is possible to increase the reliability for preventing the blades from dropping off.

また、この脱落防止保証手段は、前記保持手段を回転軸方向に付勢する構成としたものであるので、羽根を回転軸に保持させる保持手段の保持力を強化することが出来、その点からも羽根の脱落防止に対する信頼性を高めることが出来るものとなる。 Further, since the drop-off prevention guarantee means is configured to bias the holding means in the direction of the rotation axis, the holding force of the holding means for holding the blades on the rotation axis can be strengthened. Also, the reliability for preventing the blades from falling off can be improved.

以下、本発明の実施の形態について、図１〜図８を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to FIGS.

（実施の形態１）
実施の形態１は、図１に示すように、天井埋込形の換気扇に組み込まれる遠心タイプの送風機に係るものである。 (Embodiment 1)
As shown in FIG. 1, Embodiment 1 relates to a centrifugal type blower incorporated in a ceiling-embedded ventilation fan.

天井埋込形の換気扇は、天井裏に挿入設置され、下面に室内に臨む開口を有する箱状のフレーム２を有する。 A ceiling-embedded ventilation fan has a box-shaped frame 2 that is inserted and installed in the back of the ceiling and has an opening facing the room on the lower surface.

このフレーム２内には、スクロール状のケーシング３を設け、このケーシング３内には、このケーシング３内に配設され電動機４（図２に示す）と、この電動機４によって回転駆動される遠心送風式の羽根１とからなる送風機を組み込んでいる。 A scroll-like casing 3 is provided in the frame 2, and an electric motor 4 (shown in FIG. 2) disposed in the casing 3 and a centrifugal fan that is rotationally driven by the electric motor 4 are provided in the casing 3. The blower which consists of the type | formula blade | wing 1 is incorporated.

図２に示すように、電動機４の回転軸５の根元側（図２における上方）には、ピン６ａを直交貫通させて固着した羽根回り止め部６を設け、また回転軸５の先端側（図２における下側）には、全周にわたって外周方向に開口した環状の凹溝７を設けている。 As shown in FIG. 2, on the base side of the rotating shaft 5 of the electric motor 4 (upper side in FIG. 2), there is provided a blade detent portion 6 fixed by penetrating pins 6a orthogonally, and the tip side of the rotating shaft 5 ( On the lower side in FIG. 2, there is provided an annular groove 7 that opens in the outer circumferential direction over the entire circumference.

羽根１は、複数のブレードを備えた外周側のブレード部８と、電動機４の回転軸５を挿入して固着される中央側のボス部９とを一体化して形成したものであり、またボス部９の図２の上側端部には、回転軸５の羽根回り止め部６に係合する係合部１０が形成されている。 The blade 1 is formed by integrating an outer peripheral blade portion 8 having a plurality of blades and a central boss portion 9 into which the rotating shaft 5 of the electric motor 4 is inserted and fixed. An engaging portion 10 that engages with the blade rotation preventing portion 6 of the rotating shaft 5 is formed at the upper end portion of the portion 9 in FIG.

さらに、回転軸５の図２における下端側には、凹溝７を構成要件の一つとする羽根１の抜け止めをなす羽根ロック部１１が設けられている。 Further, on the lower end side of the rotating shaft 5 in FIG. 2, a blade lock portion 11 is provided that prevents the blade 1 from being detached, the groove 7 being one of the constituent requirements.

羽根ロック部１１には、図２、図３に示すように、横断面形状が回転軸５を挟む、ほぼＵ字状となる保持部１２と押圧部１３とが配設されており、保持部１２を回転軸５の凹溝７の底面に当接させている。なお、押圧部１３の根元側（図２の上端側）は、これら図２、図３のごとく、ボス部９に固定されており、押圧部１３の遊端側（図３の上端側）に上記Ｕ字状となる保持部１２が一体化されている。 As shown in FIGS. 2 and 3, the blade lock portion 11 is provided with a holding portion 12 and a pressing portion 13 having a substantially U-shaped cross section across the rotation shaft 5. 12 is brought into contact with the bottom surface of the groove 7 of the rotary shaft 5. In addition, the base side (upper end side of FIG. 2) of the press part 13 is being fixed to the boss | hub part 9 like these FIG. 2, FIG. 3, and it is on the free end side (upper end side of FIG. 3) of the press part 13. The U-shaped holding part 12 is integrated.

すなわち、横断面形状が回転軸５を挟む、ほぼＵ字状となる保持部１２と押圧部１３とを、回転軸５に対して互い違いの方向に一対設けて、一対の羽根ロック部１１を構成している。 That is, a pair of blade locking portions 11 is configured by providing a pair of holding portions 12 and pressing portions 13 that are substantially U-shaped with a cross-sectional shape sandwiching the rotating shaft 5 in a direction alternate with respect to the rotating shaft 5. doing.

そしてこの状態では、一対の保持部１２が、その弾性力により内面側どうしで凹溝７部を挟持して、羽根１を回転軸５に保持している。 In this state, the pair of holding portions 12 hold the blade 1 on the rotating shaft 5 by sandwiching the concave groove 7 portion between the inner surfaces by the elastic force.

羽根ロック部１１は回転軸５に対して互い違いの方向に一対設けられているので、一対となる押圧部１３を指先で挟んで力を内方に加えると、一対の保持部１２は、互いに離れる方向へ移動して回転軸５の凹溝７から外れ保持力が解除される。 Since a pair of blade lock portions 11 are provided in a direction alternate with respect to the rotation shaft 5, when a force is applied inward with the pair of pressing portions 13 sandwiched between the fingertips, the pair of holding portions 12 are separated from each other. It moves in the direction and is released from the concave groove 7 of the rotating shaft 5 to release the holding force.

すなわち、この羽根ロック部１１は羽根１の回転軸５への着脱手段を構成しているのである。 That is, the blade lock portion 11 constitutes a means for attaching and detaching the blade 1 to the rotating shaft 5.

また、ボス部９には、羽根ロック部１１を覆うキャップ状のカバー１４が開閉自在に設けられている（後述するが、このカバー１４が羽根１の脱落防止保証手段を構成している）。 The boss portion 9 is provided with a cap-like cover 14 that covers the blade lock portion 11 so as to be freely opened and closed (which will be described later, this cover 14 constitutes a means for preventing the blade 1 from falling off).

カバー１４は、図３に示すボス部９に固定されるベース部１４ａと、ベース部１４ａの外周部に設けられたヒンジ部１４ｂを介して開閉自在に設けられたキャップ部１４ｃとからなる。 The cover 14 includes a base portion 14a fixed to the boss portion 9 shown in FIG. 3 and a cap portion 14c provided to be opened and closed via a hinge portion 14b provided on the outer peripheral portion of the base portion 14a.

また、図４に示すようにキャップ部１４ｃの外周部には、ヒンジ部１４ｂと対向する箇所にベース部１４ａの係合用突起１５ａと係合してキャップ部１４ｃの閉塞を保持する係合孔１５ｂを有する係合用爪１５ｃが設けられている。 Further, as shown in FIG. 4, an engagement hole 15 b is formed in the outer peripheral portion of the cap portion 14 c so as to engage with the engagement protrusion 15 a of the base portion 14 a at a position facing the hinge portion 14 b to keep the cap portion 14 c closed. The engaging claw 15c having the above is provided.

さらに、キャップ部１４ｃの背面（図４における上面）には、キャップ部１４ｃ閉塞時に、一方の羽根ロック部１１の保持部１２と、この保持部１２と隣り合うもう他方の羽根ロック部１１の押圧部１３との間に挿入されて、保持部１２の内方（開放方向）への動きを阻止する突起状の保持部固定部１６を設けている。 Further, on the back surface (upper surface in FIG. 4) of the cap portion 14c, when the cap portion 14c is closed, the holding portion 12 of one blade lock portion 11 and the other blade lock portion 11 adjacent to the holding portion 12 are pressed. A protrusion-shaped holding portion fixing portion 16 that is inserted between the holding portion 13 and prevents the holding portion 12 from moving inward (in the opening direction) is provided.

また、図４に示すように、キャップ部１４ｃの外周部で係合用爪１５ｃの直近に、キャップ部１４ｃを開く操作をしやすくする指掛け用リブ１７を設けている。さらに、係合用爪１５ｃとの間に隙間を形成し、先端側を根元側よりも薄くなるように傾斜させたガイドリブ１８を設け、係合用爪１５ｃに係合するベース部１４ａの外周部がこの隙間に嵌合するようにして、キャップ部１４ｃを塞ぐ操作をしやすくしている。 Further, as shown in FIG. 4, a finger hooking rib 17 is provided on the outer peripheral portion of the cap portion 14c in the vicinity of the engaging claw 15c to facilitate the operation of opening the cap portion 14c. Further, a gap is formed between the engaging claw 15c, a guide rib 18 is provided with a tip end inclined so as to be thinner than the base side, and the outer peripheral portion of the base portion 14a engaged with the engaging claw 15c is this. The cap portion 14c is easily closed by fitting in the gap.

また、図１に示すように、キャップ部１４ｃの表面側となる前面には、指掛け用リブ１７を指し、キャップ部１４ｃの開放時に指掛け用リブ１７をつまんで操作することを示す刻印２４を施している。なお、刻印２４に代えてラベルを貼付してもよい。 Further, as shown in FIG. 1, the front surface which is the front side of the cap portion 14c is provided with a marking 24 indicating that the finger-hooking rib 17 is pinched and operated when the cap portion 14c is opened. ing. A label may be attached instead of the stamp 24.

また、図３に示すように、羽根ロック部１１とカバー１４とボス部９とは、それぞれが別体の構成要素で、複数の爪１９と穴２０を係合させて接合し、一体に形成されている。 Further, as shown in FIG. 3, the blade lock part 11, the cover 14, and the boss part 9 are separate components, and are joined together by engaging a plurality of claws 19 and holes 20. Has been.

この場合、複数の爪１９および穴２０のうち、少なくとも一組の爪１９および穴２０は他の爪１９および穴２０と幅が違い、形状が異なっている。したがって、これらの構成要素は所定の取付け方向にしか取り付かない。 In this case, among the plurality of claws 19 and the holes 20, at least one pair of the claws 19 and the holes 20 is different in width and shape from the other claws 19 and the holes 20. Thus, these components can only be attached in a predetermined mounting direction.

また、キャップ部１４ｃの下部に水抜き穴２１を設けるとともに、キャップ部１４ｃの背面側を中央部から水抜き穴２１に向かって低くなるように傾斜をつけた形状としている。 In addition, a drain hole 21 is provided in the lower part of the cap part 14c, and the back side of the cap part 14c is inclined so as to become lower from the center toward the drain hole 21.

また、羽根ロック部１１とカバー１４とボス部９のそれぞれの色が異なるようにしている。 In addition, the blade lock part 11, the cover 14, and the boss part 9 are different in color.

上記構成において、換気扇を長時間運転すると羽根１に埃等が付着し、風量が減少したり、騒音が高くなるので、羽根１を電動機４の回転軸５から取り外して掃除する必要があるが、この羽根１の取り外しは以下のようにして行われる。 In the above configuration, if the ventilation fan is operated for a long time, dust or the like adheres to the blade 1, and the air volume decreases or the noise increases, so it is necessary to remove the blade 1 from the rotating shaft 5 of the electric motor 4 and clean it. The blade 1 is removed as follows.

まず、図５に示すように、フレーム２の下面を覆って取り付けられている前面パネル２２を外し、ケーシング３の下面に設けられて吸込口を形成したオリフィス２３を外す。 First, as shown in FIG. 5, the front panel 22 attached so as to cover the lower surface of the frame 2 is removed, and the orifice 23 provided on the lower surface of the casing 3 to form the suction port is removed.

そして、図４のカバー１４のキャップ部１４ｃを、指掛け用リブ１７を指でつまんでヒンジ部１４ｂを支点として開く（例えば図３の状態）。このとき、指掛け用リブ１７によって、キャップ部１４ｃを開く方向に力を加える箇所をつまみやすくなり、また、指掛け用リブ１７の使用を指し示す刻印２４によって、キャップ部１４ｃを開放するためにつまみ操作する箇所が、迷わずにすぐにわかることとなる。 Then, the cap portion 14c of the cover 14 of FIG. 4 is opened with the finger hooking ribs 17 pinched with fingers and the hinge portion 14b as a fulcrum (for example, the state of FIG. 3). At this time, the finger-engaging rib 17 makes it easy to pinch a portion where force is applied in the direction of opening the cap portion 14c, and the knob operation is performed to open the cap portion 14c by the marking 24 indicating the use of the finger-hanging rib 17. The location will be immediately understood without hesitation.

そして、キャップ部１４ｃを開くと、キャップ部１４ｃの背面の保持部固定部１６が羽根ロック部１１の保持部１２と押圧部１３との間から引き出された状態となり、一対の押圧部１３を指先で挟み内方に力を加えると、それぞれの押圧部１３と一体に形成された保持部１２が連動して回転軸５から離れる方向に動き、羽根ロック部１１の凹溝７における保持力が解除され、羽根１が回転軸５から容易に取り外される。 When the cap portion 14c is opened, the holding portion fixing portion 16 on the back surface of the cap portion 14c is pulled out from between the holding portion 12 and the pressing portion 13 of the blade lock portion 11, and the pair of pressing portions 13 are moved to the fingertips. When a force is applied inwardly between the holding portions 12, the holding portions 12 formed integrally with the respective pressing portions 13 move in a direction away from the rotating shaft 5, and the holding force in the concave groove 7 of the blade lock portion 11 is released. Then, the blade 1 is easily detached from the rotating shaft 5.

羽根１の掃除を終え回転軸５に取り付けるときは、ボス部９を回転軸５に嵌め、ボス部９の係合部１０を回転軸５の羽根回り止め部６に係合しながら、羽根１を押し上げる。すると、回転軸５の先端部（図２における下端側）で一対の保持部１２が、その弾性力に抗して左右に開き、この状態から羽根１をさらに上昇させると、凹溝７内に一対の保持部１２が弾性復帰し、係合し、これにより保持部１２の弾性力で回転軸５を凹溝７において挟持し、羽根１を回り止め、かつ、抜け止めの状態に容易に取り付けることができる。 When the blade 1 is cleaned and attached to the rotating shaft 5, the boss portion 9 is fitted on the rotating shaft 5, and the engaging portion 10 of the boss portion 9 is engaged with the blade rotation preventing portion 6 of the rotating shaft 5. Push up. Then, the pair of holding portions 12 opens to the left and right against the elastic force at the tip end portion (the lower end side in FIG. 2) of the rotating shaft 5, and when the blade 1 is further raised from this state, The pair of holding parts 12 are elastically restored and engaged, whereby the rotating shaft 5 is clamped in the concave groove 7 by the elastic force of the holding part 12, and the blades 1 are prevented from rotating and easily attached to the retaining state. be able to.

そして、以上のようにして羽根１を羽根ロック部１１によって固定した後、キャップ部１４ｃを閉じる方向に操作してカバー１４を塞ぐ。この操作により、図４のごとくキャップ部１４ｃの係合用爪１５ｃとガイドリブ１８との間の隙間に、ベース部１４ａの外周部が嵌合してキャップ部１４ｃをベース部１４ａに係合するようにガイドするので、その係合が確実になされることとなる。 And after fixing the blade | wing 1 with the blade | wing lock part 11 as mentioned above, it operates in the direction which closes the cap part 14c, and closes the cover 14. FIG. By this operation, as shown in FIG. 4, the outer peripheral portion of the base portion 14a is fitted into the gap between the engaging claw 15c of the cap portion 14c and the guide rib 18, and the cap portion 14c is engaged with the base portion 14a. Since it guides, the engagement will be made reliably.

また、図４のごとくキャップ部１４ｃを閉じると、図２のごとく突起状の保持部固定部１６が保持部１２と押圧部１３との間に挿入される。 When the cap portion 14 c is closed as shown in FIG. 4, the protruding holding portion fixing portion 16 is inserted between the holding portion 12 and the pressing portion 13 as shown in FIG. 2.

この時、突起状の保持部固定部１６は、その先端側（図２における上方）の肉厚が薄く、中部からは保持部１２と押圧部１３間の間隔よりもわずかながら大きな肉厚状態としている。このため、一対の保持部１２は突起状の保持部固定部１６により押されて凹溝７内に押されるので、保持力が強化され、また押圧部１３は外側に押され、これらの結果から長期間設置されても羽根１の荷重などにより、一対の保持部１２が広げられように動くのを阻止できる。このため、保持部１２が凹溝７から外れることがなく、羽根１が回転軸５から脱落するのを確実に防止することができる。 At this time, the protrusion-shaped holding portion fixing portion 16 has a thin thickness on the tip side (upper side in FIG. 2) and is slightly thicker than the interval between the holding portion 12 and the pressing portion 13 from the middle portion. Yes. For this reason, the pair of holding portions 12 are pushed by the protruding holding portion fixing portion 16 and pushed into the concave groove 7, so that the holding force is strengthened, and the pressing portion 13 is pushed outward. Even if it is installed for a long period of time, the pair of holding portions 12 can be prevented from moving so as to be spread due to the load of the blade 1 or the like. For this reason, the holding | maintenance part 12 does not remove | deviate from the ditch | groove 7, and it can prevent reliably that the blade | wing 1 falls off from the rotating shaft 5. FIG.

また、上記のキャップ部１４ｃの開閉操作は、キャップ部１４ｃとベース部１４ａとを連結するヒンジ部１４ｂに対向する箇所に設けた係合用爪１５ｃの係合孔１５ｂを、図４のごとくベース部１４ａの係合用突起１５ａに係合させるか、外すかの簡単な操作で行うことが出来る。またこのように、一箇所のキャップ部１４ｃの開閉で行えばいいので、操作が簡単であるだけでなく、係合用爪１５ｃの係合孔１５ｂと、ベース部１４ａの係合用突起１５ａとの一箇所の係合の状態を確認すれば良いので、キャップ部１４ｃの閉塞を確実に行うことができるようになる。 Further, the opening / closing operation of the cap portion 14c is performed by changing the engagement hole 15b of the engagement claw 15c provided at a position facing the hinge portion 14b connecting the cap portion 14c and the base portion 14a to the base portion as shown in FIG. It can be performed by a simple operation of engaging with or disengaging from the engaging protrusion 15a of 14a. Further, as described above, since it is only necessary to open and close the cap portion 14c at one place, not only the operation is simple, but also one of the engagement hole 15b of the engagement claw 15c and the engagement protrusion 15a of the base portion 14a. Since it is only necessary to confirm the state of engagement of the portions, the cap portion 14c can be reliably closed.

また、係合用爪１５ｃの係合孔１５ｂと、ベース部１４ａの係合用突起１５ａとの係合時には、「カチッ」と音がするので、この音を確認すれば、キャップ部１４ｃの閉成状態が確認できることにもなる。 Further, when the engagement hole 15b of the engagement claw 15c is engaged with the engagement protrusion 15a of the base portion 14a, a “click” sound is made. If this sound is confirmed, the cap portion 14c is closed. Can also be confirmed.

さらに、羽根ロック部１１とカバー１４とボス部９のそれぞれの色が異なるので、キャップ部１４ｃの開閉、そして、羽根１の着脱の操作時に、操作に対応する構成要素が一目で識別でき、目的の操作が迷わずに確実にできることとなる。 Further, since the colors of the blade lock part 11, the cover 14, and the boss part 9 are different, the components corresponding to the operation can be identified at a glance when the cap part 14c is opened and closed and the blade 1 is attached and detached. The operation of can be surely performed without hesitation.

一方、換気扇の製造時、羽根ロック部１１およびカバー１４をボス部９に一体に組み立てる際、複数の爪１９および穴２０のうち、少なくとも一組の爪１９および穴２０の形状が他の爪１９および穴２０の形状と異なるので、羽根１の重量バランス等を考慮して決めた所定の取付け方向にしか取り付けることができず、重量アンバランスに起因する振動の発生等の防止ができ、品質を確保できることとなる。 On the other hand, when assembling the blade lock part 11 and the cover 14 integrally with the boss part 9 at the time of manufacturing the ventilation fan, at least one pair of the claw 19 and the hole 20 among the plurality of claws 19 and the hole 20 has the shape of the other claw 19. Since it is different from the shape of the hole 20, it can be mounted only in a predetermined mounting direction determined in consideration of the weight balance of the blade 1. It can be secured.

以上のように本発明の実施の形態１の羽根の着脱装置によれば、天井に取り付けられ、内部の空間が狭い天井埋形の換気扇野のフレーム２内に組み込まれた送風機の羽根１の着脱が容易であり、羽根１の着脱が容易であっても、羽根１が電動機４の回転軸５から外れて脱落するのを確実に防止することができ、さらに、これらの羽根１の容易な着脱、羽根１の確実な脱落防止を達成できる構成としても、羽根１の落下防止のための操作が、迷わずに手間なく、かつ、確実に行うことができることとなる。 As described above, according to the blade attachment / detachment device of Embodiment 1 of the present invention, the attachment / detachment of the blade 1 of the blower that is attached to the ceiling and incorporated in the frame 2 of the ceiling-embedded ventilation fan with a narrow internal space. Even if the blades 1 are easy to attach and detach, it is possible to reliably prevent the blades 1 from being detached from the rotating shaft 5 of the electric motor 4, and to easily attach and detach these blades 1. Even if the blade 1 can be reliably prevented from falling off, the operation for preventing the blade 1 from falling can be performed without trouble and without trouble.

また、カバー１４は、上方に開いた状態のキャップ部１４ｃを備えているので、換気扇を設置する場所によっては、キャップ部１４ｃに水の溜まることがあるが、少し溜まったところで下部に設けた水抜き穴２１から下方に落ちて排出されるので、キャップ部１４内に長時間水を溜めることがなくなり、羽根１を固着している回転軸５に錆が発生したり、カバー１４内に錆水が発生するのを抑制することができる。 In addition, since the cover 14 includes the cap portion 14c that is open upward, depending on where the ventilation fan is installed, water may accumulate in the cap portion 14c. Since the water falls downward from the punched hole 21 and is discharged, water is not accumulated in the cap portion 14 for a long time, rust is generated on the rotating shaft 5 to which the blade 1 is fixed, and rust water is contained in the cover 14. Can be suppressed.

さらに、キャップ部１４ｃの背面側を、水抜き穴２１に向かって低くなる傾斜をつけた形状としているので、水の排出効果が高まる。 Furthermore, since the back surface side of the cap part 14c is made into the shape which attached the inclination which becomes low toward the drain hole 21, the discharge effect of water increases.

（実施の形態２）
実施の形態２は、図６に示すように、上記実施の形態１に対し、別体の構成要素である羽根ロック部１１とカバー１４とボス部９とを接合して一体に形成する複数の爪１９Ａおよび穴２０Ａの配置間隔を、等間隔でなく不均一にした点が相違する。 (Embodiment 2)
As shown in FIG. 6, the second embodiment has a plurality of components that are integrally formed by joining the blade lock portion 11, the cover 14, and the boss portion 9, which are separate components, to the first embodiment. The difference is that the intervals between the nails 19A and the holes 20A are not equal but non-uniform.

上記構成により、羽根１の重量バランス等を考慮して決めた所定の取付け方向とは異なる方向に誤って取り付けることが確実になくなり、品質がより保障されることとなる。 With the above-described configuration, it is possible to reliably prevent erroneous attachment in a direction different from the predetermined attachment direction determined in consideration of the weight balance of the blades 1 and the like, thereby further ensuring the quality.

（実施の形態３）
実施の形態３は、図７に示すように、カバー１４のキャップ部１４ｃの背面に突出して設ける保持部固定部１６Ａを、横断面形状でＬの字状としたことに特徴がある。 (Embodiment 3)
As shown in FIG. 7, the third embodiment is characterized in that the holding portion fixing portion 16A provided to protrude from the back surface of the cap portion 14c of the cover 14 has an L shape in cross-sectional shape.

なお、保持部固定部１６Ａの形状以外の他の構成要素と関係する構成および機能は、上記実施の形態１と同じである。 The configuration and functions related to other constituent elements other than the shape of the holding portion fixing portion 16A are the same as those in the first embodiment.

上記構成により、保持部固定部１６Ａの厚みを薄くしても強度が確保でき、保持部固定部１６Ａを背面に突出形成するキャップ部１４ｃの表面側における成形時のひけの発生をなくすことができる。 With the above configuration, the strength can be secured even if the thickness of the holding portion fixing portion 16A is reduced, and the occurrence of sink marks at the time of molding on the surface side of the cap portion 14c that protrudes and forms the holding portion fixing portion 16A on the back surface can be eliminated. .

このように本発明の実施の形態３の羽根の着脱装置によれば、保持部固定部１６Ａの強度を、カバー１４の外観上好ましい状態で確保できる。 As described above, according to the blade attaching / detaching device of Embodiment 3 of the present invention, the strength of the holding portion fixing portion 16A can be ensured in a preferable state in terms of the appearance of the cover 14.

（実施の形態４）
実施の形態４は、図８に示すように、カバー１４のキャップ部１４ｃの背面に突出して設ける保持部固定部１６Ｂを、横断面形状でコの字状としたことに特徴がある。 (Embodiment 4)
As shown in FIG. 8, the fourth embodiment is characterized in that the holding portion fixing portion 16B provided to protrude from the back surface of the cap portion 14c of the cover 14 has a U-shaped cross section.

上記構成により、上記実施の形態３と同様に、保持部固定部１６Ｂの厚みを薄くでき、キャップ部１４ｃの表面側における成形時のひけの発生をなくすことができる。 With the above-described configuration, the holding portion fixing portion 16B can be reduced in thickness as in the third embodiment, and the occurrence of sink marks during molding on the surface side of the cap portion 14c can be eliminated.

このように本発明の実施の形態４の羽根の着脱装置によれば、保持部固定部１６Ｂの強度を確保したうえで、カバー１４の外観上の不具合な状態の発生を抑えることができる。 As described above, according to the blade attaching / detaching device of Embodiment 4 of the present invention, it is possible to prevent the occurrence of a defective state in the appearance of the cover 14 while securing the strength of the holding portion fixing portion 16B.

羽根の着脱が容易で、しかも、羽根の回転軸からの脱落が確実に防止でき、特に高所に取り付けられる機器に組み込まれる送風機に有用である。 It is easy to attach and detach the blades, and the blades can be reliably prevented from falling off the rotating shaft, and is particularly useful for a blower incorporated in equipment mounted at a high place.

本発明の実施の形態１を天井埋込形換気扇に適用した斜視図The perspective view which applied Embodiment 1 of the present invention to the ceiling embedded type ventilation fan 同羽根部分の断面図Cross section of the blade 同羽根部分のカバーを外した状態を示す斜視図The perspective view which shows the state which removed the cover of the blade part 同着脱手段部分の拡大断面図Enlarged sectional view of the detachable means 同羽根を取り外し時の状態を示す分解斜視図Exploded perspective view showing the state when the blade is removed 本発明の実施の形態２の羽根からカバーを外した状態を示す斜視図The perspective view which shows the state which removed the cover from the blade | wing of Embodiment 2 of this invention 本発明の実施の形態３の羽根からカバーを外した状態を示す斜視図The perspective view which shows the state which removed the cover from the blade | wing of Embodiment 3 of this invention 本発明の実施の形態４の羽根からカバーを外した状態を示す斜視図The perspective view which shows the state which removed the cover from the blade | wing of Embodiment 4 of this invention 従来の羽根の着脱手段の拡大断面図Expanded cross-sectional view of conventional blade attachment / detachment means 同羽根の取り外し時の状態を示す分解斜視図An exploded perspective view showing the state when the blade is removed

Explanation of symbols

１羽根
５回転軸
６羽根回り止め部
７凹溝
９ボス部
１０係合部
１１羽根ロック部
１２保持部
１３押圧部
１４カバー
１４ｂヒンジ部
１５係合用爪
１６保持部固定部
１６Ａ保持部固定部
１６Ｂ保持部固定部
１７指掛け用リブ
１８ガイドリブ
１９爪
１９Ａ爪
２１水抜き穴
２４刻印 DESCRIPTION OF SYMBOLS 1 blade | wing 5 rotating shaft 6 blade | wing rotation prevention part 7 concave groove 9 boss | hub part 10 engaging part 11 blade | wing lock part 12 holding | maintenance part 13 pressing part 14 cover 14b hinge part 15 engaging claw 16 holding | maintenance part fixing | fixed part 16A holding | maintenance part fixing | fixed part 16B Holding part fixing part 17 Finger hooking rib 18 Guide rib 19 Claw 19A Claw 21 Drain hole 24 Marking

Claims

An electric motor having a rotating shaft; a blade having a boss portion into which the rotating shaft of the electric motor is inserted ; and an attaching / detaching means having a blade lock portion that performs an attaching / detaching operation of the blade to the rotating shaft. A holding means for generating a holding force for holding the blade on the rotation shaft, and a releasing means for releasing the holding force by the holding means. The holding means of the attaching / detaching means is arranged in the releasing direction of the holding force. A drop prevention guarantee means having a cap-like cover that covers the blade lock portion that suppresses the movement is provided, and the drop prevention guarantee means is configured to bias the holding means in the direction of the rotation axis . A blower provided with finger-hooking ribs that are pinched with a finger on the outer periphery to open the cover .

The blower according to claim 1, wherein the drop-off prevention guarantee means biases the releasing means of the attaching / detaching means to a side opposite to a direction in which the holding force of the holding means is released.

The blower according to claim 1 or 2, wherein the drop-off prevention guarantee means has a protrusion, and the protrusion is inserted between the holding means and the release means of the adjacent attaching / detaching means.