JP3972513B2

JP3972513B2 - Stirrer blade for washing machine

Info

Publication number: JP3972513B2
Application number: JP10936199A
Authority: JP
Inventors: 克哉齋藤; 隆行石原
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 1999-04-16
Filing date: 1999-04-16
Publication date: 2007-09-05
Anticipated expiration: 2019-04-16
Also published as: JP2000296286A

Description

【０００１】
【発明の属する技術分野】
本発明は、洗濯槽に回転自在に配設し、洗濯衣類を撹拌する洗濯機用撹拌翼に関するものである。
【０００２】
【従来の技術】
従来より、日本においては、いわゆる渦巻式洗濯機と呼ばれる、洗濯槽の底部に撹拌翼を設け、この回転によって渦巻撹拌水流を生じさせて洗濯する形式のものが実用化されている。
【０００３】
一般に、この種の撹拌翼は、図２４〜図２６に示すように、洗濯槽の内径寸法に対してほぼ７０〜９０％の外形寸法の略円盤状の基盤４０と、この基盤４０の中央部近傍から外周近傍まで、略放射状に複数個の翼４１を備えているのが通常である。
【０００４】
以上のような構成で、その動作を説明すると、撹拌翼を右回転−休止−左回転・・・・と反転させ、その回転数は毎分約１２０回転に設定し、比較的低速で回転させる。このとき、洗濯衣類に洗浄効果を与えるのは、撹拌翼により生じる水流の効果と、撹拌翼の翼４１が回転することで、衣類と撹拌翼との間に発生する抵抗力により衣類を動かす効果の２つに大別される。
【０００５】
そこで、この二要素のもたらす効果について述べると、水流に乗せて動かす要素が強いと、衣類は傷まず、また、よじれやからみが少ないが、洗浄力は弱いものとなる。一方、衣類と撹拌翼との間に発生する抵抗力により衣類を動かす要素が強いと、洗浄むらや衣類の傷みが大きく、また、よじれやからみが大きくなり、反面、洗浄効果は大きくなる。
【０００６】
これら二要素のバランスをとり、洗浄力を確保しているのが通常である。
【０００７】
【発明が解決しようとする課題】
このような従来の構成では、衣類と撹拌翼との動きは、図２６に示すように、衣類と撹拌翼との間に発生する抵抗力により異なる。図２６で、実線ａは撹拌翼の動きを示しており、点線ｂは撹拌翼の動きに対する衣類の動きを示している。
【０００８】
図２６により衣類の動きを詳しく説明すると、撹拌翼付近の衣類は、撹拌翼が起動時では、撹拌翼と衣類との抵抗が少ないため、撹拌翼のみ回転して衣類は動かないが、撹拌翼と衣類との抵抗が大きくなってから、撹拌翼の回転に追従して衣類が動き出し、撹拌翼の定常状態ではほぼ同期する。そして、撹拌翼の回転が休止に入っても、回転翼の惰性回転以上に衣類が回転する。
【０００９】
このため、衣類のよじれが大きく、洗濯や脱水終了後に衣類を取り出すとき、ほぐす労力が大きくなるという問題を有していた。
【００１０】
本発明は上記課題を解決するもので、撹拌起動時および撹拌休止時に発生する撹拌翼と衣類の回転位相差を少なくすることで、洗浄性能を維持しつつ、布のよじれや傷みを抑えることを目的としている。
【００１１】
【課題を解決するための手段】
本発明は上記目的を達成するために、洗濯衣類を撹拌するため洗濯槽に回転自在に配設する略円盤状の撹拌翼であって、中心部位と外周部位の間が略凹曲面となるように基盤の上方基面を構成し、この基面の中心部位と外周部位の中間点よりも外周部位側で、かつ周方向に間隔をおいて複数個の突出部を形成し、前記突出部の相互間に、前記突出部より高さが低く、中心寄りから外周寄りにまたがった翼部を有するものである。
【００１２】
これにより、突出部相互間の翼部による水流効果が得られるとともに、撹拌起動時および撹拌休止時に発生する撹拌翼と衣類の回転位相差を少なくすることができ、布のよじれや傷みを抑えつつ、洗浄性能を向上することができる。
【００１３】
【発明の実施の形態】
本発明の請求項１に記載の発明は、洗濯衣類を撹拌するため洗濯槽に回転自在に配設する略円盤状の撹拌翼であって、内、外周部位の間が略凹曲面となるように基盤の上方基面を構成し、この基面の径方向中間点よりも外周で、かつ周方向に間隔をおいて複数個の突出部を形成したものであり、突出部相互間の翼部による水流効果が得られるとともに、撹拌起動時および撹拌休止時に発生する撹拌翼と衣類の回転位相差を少なくすることができ、布のよじれや傷みを抑えつつ、洗浄性能を向上することができる。
【００１４】
請求項２に記載の発明は、上記請求項１に記載の発明において、突出部は、回転中心軸に対向して、かつこれに平行な稜線を持つ略平面部を有するものであり、衣類を回転中心軸側に寄せつつ撹拌するため、撹拌翼から外周方向への力の分散が減少し、消費電力を低減できる。
【００１５】
請求項３に記載の発明は、上記請求項１に記載の発明において、突出部は、回転中心軸に対向して、かつこれに平行でない稜線を持つ略平面部を有するものであり、衣類を洗濯槽の中心側に寄せつつ撹拌するため、撹拌翼から外周方向への力の分散が減少するため、消費電力を低減でき、かつ、衣類の動きが複雑になり洗いむらを小さくすることができる。
【００１６】
請求項４に記載の発明は、上記請求項１〜３に記載の発明において、突出部は、回転方向に対して、対向する略傾斜面を有するものであり、撹拌翼が回転したとき、衣類が洗濯槽の上部方向へ移動しようとすることで、洗いむらを低減することができる。
【００１７】
請求項５に記載の発明は、上記請求項１〜４に記載の発明において、突出部は、その外周側の側面を、回転中心軸側に向けに傾斜する傾斜面としたものであり、撹拌翼が回転したとき、衣類は突出部と洗濯槽との隙間が確保されているため、衣類が挟まり、抵抗となることがなく、突出部への抵抗が減少し、消費電力も減少できる。
【００１８】
請求項６に記載の発明は、上記請求項３〜５に記載の発明において、突出部は、その基盤との接続部分に略鉛直方向の面を形成したものであり、撹拌翼が回転したとき、水流をおこし、衣類が少ない場合、突出部が衣類に機能しにくい場合でも、水流による洗浄効果を確保できる。
【００１９】

【実施例】
以下、本発明の実施例について、図面を参照しながら説明する。
【００２０】
（実施例１）
図３に示すように、洗濯兼脱水槽（洗濯槽）１は、中央底部に撹拌翼２を回転自在に配設している。水槽３は洗濯兼脱水槽１を内包し、この水槽３の外底部には基板４を固着し、モータ５、排水弁装置６、洗濯兼脱水切替機構７などを配設しており、基板４の外縁部には防振装置８、吊り棒９を介して外枠１０の上部角隅より垂下支持している。外枠１０の上部に上部カバー１１を設け、給水弁１２、電源スイッチ１３、制御装置１４などを配設している。
【００２１】
撹拌翼２は、図１および図２に示すように、その上面１５の中央部が球面上に盛り上がった半球部になっており、外周方向に向かって基面１６が下降し、ある距離下降して基面１６は水平面１７となり、中心部１８と外周部１９のほぼ中間点付近から外周方向に向かって上昇する曲面を持たせて基盤２０を形成し、この基盤２０の上に、中心部１８と外周部１９のほぼ中間点付近よりも外周よりに、略直方体状の突出部２１を形成している。
【００２２】
突出部２１の個数ｎ、高さｈ、幅ｗは、撹拌翼２の基盤２０の半径ｒと洗濯機の洗濯容量により異なるが、個数ｎ＝３の場合、高さｈは、半径ｒの２０〜３０％の範囲にとったのが良好な結果を示した。幅ｗについては、突出部２１間の距離が大きいほど衣類をひっかける効果があるため、幅ｗはｈ以下が好ましい。
【００２３】
上記構成において、図４および図５を参照しながら動作を説明する。撹拌翼２を右回転−休止−左回転・・・・と反転させ、その回転数は毎分約１２０回転程度で低速回転させる。
【００２４】
衣類に洗浄効果を与えるのは、撹拌翼２の回転により生じる水流の効果と衣類と撹拌翼２の間に発生する抵抗力により衣類を動かす効果の２つに大別される。
【００２５】
上記構成の撹拌翼２を回転させると、撹拌翼２の基盤２０の中央部の中心部１８と外周部１９のほぼ中間点までの間は、基面１６のみで形成しているので、この部分で衣類に対して抵抗力は生じないため、衣類をひっかけて動かすことはない。
【００２６】
つぎに、撹拌翼２の基盤２０の中心部１８と外周部１９のほぼ中間点から外周部１９では、図４に示すように、突出部２１相互間に水２２に浸かっている衣類２３が入り込むため、図５に示すように、撹拌翼２と衣類２３との回転位相差をほとんどなくして、衣類を動かすことができる。なお、図５で、実線ａは撹拌翼の動きを示しており、点線ｂは撹拌翼の動きに対する衣類２３の動きを示している。
【００２７】
このように、撹拌翼２は、基盤２０の中央部の中心部１８と外周部１９のほぼ中間点までの間は、基面１６のみで形成し、中心部１８と外周部１９のほぼ中間点付近よりも外周よりに略直方体状の突出部２１を形成しているので、起動時から衣類と撹拌翼２の回転位相差がなく、撹拌翼２の回転が休止してからも、衣類が撹拌翼２の回転に追従しやすくなる。このため、余分な布まわりが減少することができ、布傷み、布からみを減少することができる。
【００２８】
洗浄性能は、従来形状の撹拌翼２での衣類との回転位相による機械力伝達ロスがないため、小刻みな反転時限の水流（例えば、１．０秒オン−０．６秒オフ）、低い回転数（例えば、毎分９０回転）で同等の性能が得られる。
【００２９】
なお、本実施例では、洗濯兼脱水槽１の底部に配設した全自動洗濯機の撹拌翼２を例に説明しているが、洗濯槽と脱水槽を併設した二槽式洗濯機の洗濯槽に併設しても同様の効果が得られる。
【００３０】
また、本実施例では、撹拌翼２は、基盤２０の上に中心部１８と外周部１９のほぼ中間点付近よりも外周よりに、略直方体状の突出部２１を形成しているが、突出部２１は、略直方体状の他、略多面体状、略多角錐体状、略円筒状、略円錐体状などであっても同様の作用効果を得ることができる。
【００３１】
（実施例２）
図６〜図８に示すように、撹拌翼２ａは、基盤２０の中央部の中心部１８と外周部１９のほぼ中間点までの間は基面１６のみで形成し、中心部１８と外周部１９のほぼ中間点付近よりも外周よりに、回転軸２４に対向して、かつこれに平行な稜線２５を持つ略平面部２６を有する突出部２７を形成している。他の構成は実施例１と同じである。
【００３２】
上記構成において、撹拌翼２ａを回転させると、撹拌翼２ａの基盤２０の中央部の中心部１８と外周部１９のほぼ中間点までの間は、基面１６のみで形成しているので、この部分で衣類に対して抵抗力は生じないため、衣類をひっかけて動かすことはなく、基盤２０の中心部１８と外周部１９のほぼ中間点から外周部１９では、突出部２１相互間に衣類が入り込むため、撹拌翼２ａと衣類との回転位相差をほとんどなくして、衣類を動かすことができる。
【００３３】
したがって、起動時から衣類と撹拌翼２ａの回転位相差がなく、撹拌翼２ａの回転が休止してからも、衣類が撹拌翼２ａの回転に追従しやすくなる。このため、余分な布まわりが減少することができ、布傷み、布からみを減少することができる。
【００３４】
さらに、突出部２７に回転方向に対して傾斜した略平面部２６があるため、撹拌翼２ａを図６の矢印Ａ方向に回転させたとき、衣類は、図６の矢印Ｂに示すように、外周方向へ移動しようとする力は働かず、中心軸方向へ移動しようとする力が働く。したがって、衣類が撹拌翼２ａ上に寄りやすくなり、洗濯兼脱水槽１と衣類間の抵抗が減少し、消費電力も減少できる。
【００３５】
（実施例３）
図９〜図１１に示すように、撹拌翼２ｂは、基盤２０の中央部の中心部１８と外周部１９のほぼ中間点までの間は基面１６のみで形成し、中心部１８と外周部１９のほぼ中間点付近よりも外周よりに、回転軸２４に対向して、かつこれに平行でない稜線２８を持つ略平面部２９を有する突出部３０を形成している。この稜線２８の角度は、水平面に対し５０〜７０度程度とする。他の構成は実施例１と同じである。
【００３６】
上記構成において、撹拌翼２ｂを回転させると、撹拌翼２ｂの基盤２０の中央部の中心部１８と外周部１９のほぼ中間点までの間は、基面１６のみで形成しているので、この部分で衣類に対して抵抗力は生じないため、衣類をひっかけて動かすことはなく、基盤２０の中心部１８と外周部１９のほぼ中間点から外周部１９では、突出部３０相互間に衣類が入り込むため、撹拌翼２ｂと衣類との回転位相差をほとんどなくして、衣類を動かすことができる。
【００３７】
したがって、起動時から衣類と撹拌翼２ｂの回転位相差がなく、撹拌翼２ｂの回転が休止してからも、衣類が撹拌翼２ｂの回転に追従しやすくなる。このため、余分な布まわりが減少することができ、布傷み、布からみを減少することができる。
【００３８】
さらに、突出部３０に回転方向に対して傾斜した略平面部２９があるため、撹拌翼２ｂを図９の矢印Ａ方向に回転させたとき、衣類は、図９および図１０の矢印Ｂに示すように、外周方向へ移動しようとする力は働かず、洗濯兼脱水槽１の中心方向へ移動しようとする力が働く。
【００３９】
したがって、衣類が撹拌翼２ｂ上に寄りやすくなり、洗濯兼脱水槽１と衣類間の抵抗が減少し、消費電力も減少できる。また、衣類が洗濯兼脱水槽１の中心方向へ移動しようとすることで、洗いむらを低減することができる。
【００４０】
（実施例４）
図１２〜図１４に示すように、撹拌翼２ｃは、基盤２０の中央部の中心部１８と外周部１９のほぼ中間点までの間は基面１６のみで形成し、中心部１８と外周部１９のほぼ中間点付近よりも外周よりに、回転方向に対して、対向する略傾斜面３１を有する突出部３２を形成している。この略傾斜面２８の角度は約７０度とする。他の構成は実施例１と同じである。
【００４１】
上記構成において、撹拌翼２ｃを回転させると、撹拌翼２ｃの基盤２０の中央部の中心部１８と外周部１９のほぼ中間点までの間は、基面１６のみで形成しているので、この部分で衣類に対して抵抗力は生じないため、衣類をひっかけて動かすことはなく、基盤２０の中心部１８と外周部１９のほぼ中間点から外周部１９では、突出部３２相互間に衣類が入り込むため、撹拌翼２ｃと衣類との回転位相差をほとんどなくして、衣類を動かすことができる。
【００４２】
したがって、起動時から衣類と撹拌翼２ｃの回転位相差がなく、撹拌翼２ｃの回転が休止してからも、衣類が撹拌翼２ｃの回転に追従しやすくなる。このため、余分な布まわりが減少することができ、布傷み、布からみを減少することができる。
【００４３】
さらに、突出部３２に回転方向に対して傾斜している略傾斜面３１があるため、撹拌翼２ｃを図１２の矢印Ａ方向に回転させたとき、衣類は、図１２および図１３の矢印Ｂに示すように、洗濯兼脱水槽１の上部方向へ移動しようとする力が働く。したがって、衣類の突出部３２への抵抗が減少し、消費電力も減少できる。また、衣類が洗濯兼脱水槽１の上部方向へ移動しようとすることで、洗いむらを低減することができる。
【００４４】
（実施例５）
図１５および図１６に示すように、撹拌翼２ｄは、基盤２０の中央部の中心部１８と外周部１９のほぼ中間点までの間は基面１６のみで形成し、中心部１８と外周部１９のほぼ中間点付近よりも外周よりに、外周側の側面を、回転中心軸側に向け傾斜する略傾斜面３３を有する突出部３４を形成している。この略傾斜面３３の角度は、洗濯兼脱水槽１の底部の形状、モータ５のトルクにより決まるが、水平面に対し８０度程度とする。他の構成は実施例１と同じである。
【００４５】
上記構成において、撹拌翼２ｄを回転させると、撹拌翼２ｄの基盤２０の中央部の中心部１８と外周部１９のほぼ中間点までの間は、基面１６のみで形成しているので、この部分で衣類に対して抵抗力は生じないため、衣類をひっかけて動かすことはなく、基盤２０の中心部１８と外周部１９のほぼ中間点から外周部１９では、突出部３４相互間に衣類が入り込むため、撹拌翼２ｄと衣類との回転位相差をほとんどなくして、衣類を動かすことができる。
【００４６】
したがって、起動時から衣類と撹拌翼２ｄの回転位相差がなく、撹拌翼２ｄの回転が休止してからも、衣類が撹拌翼２ｄの回転に追従しやすくなる。このため、余分な布まわりが減少することができ、布傷み、布からみを減少することができる。
【００４７】
さらに、突出部３４に外周側の側面に回転中心軸側に向け傾斜する略傾斜面３３があるため、撹拌翼２ｄが回転したとき、衣類は、突出部３４と洗濯兼脱水槽１との隙間が確保されているため、衣類が挟まり、抵抗となることがなく、突出部３４への抵抗が減少し、消費電力も減少できる。
【００４８】
（実施例６）
図１７〜図１９に示すように、撹拌翼２ｅは、基盤２０の中央部の中心部１８と外周部１９のほぼ中間点までの間は基面１６のみで形成し、中心部１８と外周部１９のほぼ中間点付近よりも外周よりに、基盤２０との接続部に略鉛直面３５を有する突出部３６を形成している。略鉛直面３５の高さは、突出部３６の高さに対して、約２０％程度とれば、突出部３６の効果を大きく損なわれない結果が出ている。他の構成は実施例１と同じである。
【００４９】
上記構成において、撹拌翼２ｅを回転させると、撹拌翼２ｅの基盤２０の中央部の中心部１８と外周部１９のほぼ中間点までの間は、基面１６のみで形成しているので、この部分で衣類に対して抵抗力は生じないため、衣類をひっかけて動かすことはなく、基盤２０の中心部１８と外周部１９のほぼ中間点から外周部１９では、突出部３４相互間に衣類が入り込むため、撹拌翼２ｅと衣類との回転位相差をほとんどなくして、衣類を動かすことができる。
【００５０】
したがって、起動時から衣類と撹拌翼２ｅの回転位相差がなく、撹拌翼２ｅの回転が休止してからも、衣類が撹拌翼２ｅの回転に追従しやすくなる。このため、余分な布まわりが減少することができ、布傷み、布からみを減少することができる。
【００５１】
さらに、突出部３６にその基盤２０との接続部に略鉛直面３５を有しているため、撹拌翼２ｅが回転したとき、水流をおこし、衣類が少ない場合、突出部３６が衣類に機能しにくい場合でも、水流による洗浄効果を得ることができる。
【００５２】
（実施例７）
図２０および図２１に示すように、撹拌翼２ｆは、基盤２０の中央部の中心部１８と外周部１９のほぼ中間点までの間は基面１６のみで形成し、中心部１８と外周部１９のほぼ中間点付近よりも外周よりに突出部３７を有し、突出部３７の相互間に突出部３７より高さが低く、基盤２０の中心部１８より外周部１９にまたがった翼部３８を有している。
【００５３】
この翼部３８の最高点は、基盤２０の中心部１８と外周部１９のほぼ中間点付近にとり、突出部３７が隆起してくる付近では下降させることで、突出部３７の効果を損なわれない結果が出ている。また、この翼部３８の形状は、目的とする衣類により異なる。他の構成は実施例１と同じである。
【００５４】
上記構成において、撹拌翼２ｆを回転させると、基盤２０の中心部１８と外周部１９のほぼ中間点から外周部１９では、突出部３４相互間に衣類が入り込むため、撹拌翼２ｆと衣類との回転位相差をほとんどなくして、衣類を動かすことができる。
【００５５】
したがって、起動時から衣類と撹拌翼２ｆの回転位相差がなく、撹拌翼２ｆの回転が休止してからも、衣類が撹拌翼２ｆの回転に追従しやすくなる。このため、余分な布まわりが減少することができ、布傷み、布からみを減少することができる。
【００５６】
さらに、突出部３７相互間の翼部３８による水流効果が得られ、撹拌起動時および撹拌休止時に発生する撹拌翼２ｆと衣類の回転位相差を少なくすることで、布のよじれや傷みを抑えながら、洗浄性能をさらに向上することができる。
【００５７】
（実施例８）
図２２および図２３に示すように、撹拌翼２ｇは、基盤２０の中央部の中心部１８と外周部１９のほぼ中間点までの間は基面１６のみで形成し、中心部１８と外周部１９のほぼ中間点付近よりも外周よりに突出部３９を有し、突出部３９の相互間に突出部３９より高さが低く、かつ、突出部３９より内側に位置する内側突出部４０を有している。
【００５８】
この内側突出部４０は、外周側の突出部３９の効果を損なわない形状で、かつ、外周側の突出部３９の機能しない内側に寄った衣類に入り込みやすい形状であるのが望ましい。他の構成は実施例１と同じである。
【００５９】
上記構成において、撹拌翼２ｇを回転させると、基盤２０の中心部１８と外周部１９のほぼ中間点から外周部１９では、突出部３４相互間に衣類が入り込むため、撹拌翼２ｇと衣類との回転位相差をほとんどなくして、衣類を動かすことができる。
【００６０】
したがって、起動時から衣類と撹拌翼２ｇの回転位相差がなく、撹拌翼２ｇの回転が休止してからも、衣類が撹拌翼２ｇの回転に追従しやすくなる。このため、余分な布まわりが減少することができ、布傷み、布からみを減少することができる。
【００６１】
さらに、突出部３９相互間の内側突出部４０が、撹拌起動時および撹拌休止時に発生する撹拌翼２ｇと衣類の回転位相差を少なくする効果を増幅し、さらに布のよじれや傷みを抑えつつ、洗浄性能を向上することができる。
【００６２】
【発明の効果】
以上のように本発明の請求項１に記載の発明によれば、洗濯衣類を撹拌するため洗濯槽に回転自在に配設する略円盤状の撹拌翼であって、中心部位と外周部位の間が略凹曲面となるように基盤の上方基面を構成し、この基面の中心部位と外周部位の中間点よりも外周部位側で、かつ周方向に間隔をおいて複数個の突出部を形成し、前記突出部の相互間に、前記突出部より高さが低く、中心寄りから外周寄りにまたがった翼部を有するから、突出部相互間の翼部による水流効果が得られるとともに、撹拌起動時および撹拌休止時に発生する撹拌翼と衣類の回転位相差を少なくすることができ、布のよじれや傷みを抑えつつ、洗浄性能を向上することができる。
【００６３】
また、請求項２に記載の発明によれば、突出部は、回転中心軸に対向して、かつこれに平行な稜線を持つ略平面部を有するから、衣類を回転中心軸側に寄せつつ撹拌するため、撹拌翼から外周方向への力の分散が減少し、消費電力を低減できる。
【００６４】
また、請求項３に記載の発明によれば、突出部は、回転中心軸に対向して、かつこれに平行でない稜線を持つ略平面部を有するから、衣類を洗濯槽の中心側に寄せつつ撹拌するため、撹拌翼から外周方向への力の分散が減少するため、消費電力を低減でき、かつ、衣類の動きが複雑になり洗いむらを小さくすることができる。
【００６５】
また、請求項４に記載の発明によれば、突出部は、回転方向に対して、対向する略傾斜面を有するから、撹拌翼が回転したとき、衣類が洗濯槽の上部方向へ移動しようとすることで、洗いむらを低減することができる。
【００６６】
また、請求項５に記載の発明によれば、突出部は、その外周側の側面を、回転中心軸側に向けに傾斜する傾斜面としたから、撹拌翼が回転したとき、衣類は突出部と洗濯槽との隙間が確保されているため、衣類が挟まり、抵抗となることがなく、突出部への抵抗が減少し、消費電力も減少できる。
【００６７】
また、請求項６に記載の発明によれば、突出部は、その基盤との接続部分に略鉛直方向の面を形成したから、撹拌翼が回転したとき、水流をおこし、衣類が少ない場合、突出部が衣類に機能しにくい場合でも、水流による洗浄効果を確保できる。
【図面の簡単な説明】
【図１】本発明の第１の実施例の洗濯機用撹拌翼の上面図
【図２】同洗濯機用撹拌翼の断面図
【図３】同洗濯機用撹拌翼を備えた洗濯機の断面図
【図４】同洗濯機用撹拌翼を円周方向に展開し衣類との関連を示す図
【図５】同洗濯機用撹拌翼の動きと衣類の動きを示すタイムチャート
【図６】本発明の第２の実施例の洗濯機用撹拌翼の上面図
【図７】同洗濯機用撹拌翼の断面図
【図８】同洗濯機用撹拌翼の要部斜視図
【図９】本発明の第３の実施例の洗濯機用撹拌翼の上面図
【図１０】同洗濯機用撹拌翼の断面図
【図１１】同洗濯機用撹拌翼の要部斜視図
【図１２】本発明の第４の実施例の洗濯機用撹拌翼の上面図
【図１３】同洗濯機用撹拌翼の断面図
【図１４】同洗濯機用撹拌翼の要部斜視図
【図１５】本発明の第５の実施例の洗濯機用撹拌翼の上面図
【図１６】同洗濯機用撹拌翼の断面図
【図１７】本発明の第６の実施例の洗濯機用撹拌翼の上面図
【図１８】同洗濯機用撹拌翼の断面図
【図１９】同洗濯機用撹拌翼の要部斜視図
【図２０】本発明の第７の実施例の洗濯機用撹拌翼の上面図
【図２１】同洗濯機用撹拌翼の断面図
【図２２】本発明の第８の実施例の洗濯機用撹拌翼の上面図
【図２３】同洗濯機用撹拌翼の断面図
【図２４】従来の洗濯機用撹拌翼の上面図
【図２５】同洗濯機用撹拌翼の断面図
【図２６】同洗濯機用撹拌翼の動きと衣類の動きを示すタイムチャート
【符号の説明】
１洗濯兼脱水槽（洗濯槽）
２撹拌翼
２１突出部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stirring blade for a washing machine that is rotatably disposed in a washing tub and stirs laundry clothes.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in Japan, a so-called spiral washing machine, in which a stirring blade is provided at the bottom of a washing tub and a swirl stirring water flow is generated by this rotation, has been put into practical use.
[0003]
Generally, as shown in FIGS. 24 to 26, this type of agitating blade includes a substantially disk-shaped base 40 having an outer dimension of approximately 70 to 90% of the inner diameter of the washing tub, and a central portion of the base 40. In general, a plurality of blades 41 are provided substantially radially from the vicinity to the vicinity of the outer periphery.
[0004]
With the configuration as described above, the operation will be described. The stirring blade is reversed to the right rotation-pause-left rotation..., The rotation speed is set to about 120 rotations per minute, and the rotation is performed at a relatively low speed. . At this time, the washing effect is given to the washing clothes by the effect of the water flow generated by the stirring blades and the effect of moving the clothes by the resistance force generated between the clothes and the stirring blades by the rotation of the blades 41 of the stirring blades. It is roughly divided into two.
[0005]
Therefore, the effects of these two elements will be described. If the elements that are moved in the water flow are strong, the clothes will not be damaged, and there will be little kinking and entanglement, but the cleaning power will be weak. On the other hand, if the element that moves the clothes due to the resistance generated between the clothes and the stirring blade is strong, the unevenness of washing and the damage of the clothes become large, and the kinking and entanglement become large, while the cleaning effect becomes large.
[0006]
Usually, these two factors are balanced to ensure detergency.
[0007]
[Problems to be solved by the invention]
In such a conventional configuration, the movement between the garment and the stirring blade varies depending on the resistance force generated between the clothing and the stirring blade, as shown in FIG. In FIG. 26, the solid line a indicates the movement of the stirring blade, and the dotted line b indicates the movement of the clothing with respect to the movement of the stirring blade.
[0008]
The movement of the clothing will be described in detail with reference to FIG. 26. Since the clothing near the stirring blade has little resistance between the stirring blade and the clothing when the stirring blade is activated, only the stirring blade rotates and the clothing does not move. After the resistance between the garment and the clothes increases, the garment starts to follow the rotation of the stirring blade, and is almost synchronized in the steady state of the stirring blade. And even if the rotation of the stirring blade enters a pause, the clothes rotate more than the inertial rotation of the rotating blade.
[0009]
For this reason, there has been a problem that the kinking of the clothes is large, and the labor for unraveling becomes large when the clothes are taken out after washing or dehydration.
[0010]
The present invention solves the above-mentioned problem, by reducing the rotational phase difference between the stirring blade and the clothing that occurs when stirring is started and when the stirring is stopped, thereby suppressing the kinking and damage of the fabric while maintaining the cleaning performance. It is aimed.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is a substantially disc-shaped stirring blade that is rotatably disposed in a washing tub for stirring laundry clothes so that a substantially concave curved surface is formed between a central portion and an outer peripheral portion. to constitute an upper base surface of the base, in the outer peripheral portion side from the midpoint of the central portion and the outer peripheral portion of the base surface and circumferentially spaced to form a plurality of protrusions, the protrusions Between each other, there is a wing that is lower than the protrusion and spans from the center to the outer periphery .
[0012]
As a result, the water flow effect by the blades between the protrusions can be obtained, and the rotational phase difference between the stirring blades and the clothes generated when stirring is started and when the stirring is stopped can be reduced, and the kinking and damage of the cloth can be suppressed. , Cleaning performance can be improved.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention is a substantially disk-shaped stirring blade that is rotatably disposed in a washing tub for stirring laundry clothes so that a substantially concave curved surface is formed between the inner and outer peripheral portions. to constitute an upper base surface of the base, the outer peripheral than the radial midpoint of the base surface, and are those circumferential direction at intervals to form a plurality of projections, wings between the projecting portions mutually As a result, the rotational phase difference between the stirring blade and the garment that occurs when stirring is started and when the stirring is stopped can be reduced, and the washing performance can be improved while suppressing the kinking and damage of the cloth.
[0014]
The invention according to claim 2 is the invention according to claim 1, wherein the projecting portion has a substantially flat portion having a ridge line facing and parallel to the rotation center axis. Since the agitation is performed while approaching the rotation center axis side, the dispersion of force from the agitating blade toward the outer peripheral direction is reduced, and the power consumption can be reduced.
[0015]
According to a third aspect of the present invention, in the first aspect of the present invention, the protrusion has a substantially flat portion having a ridge line that faces the rotation center axis and is not parallel to the rotation center axis. Since stirring is performed while approaching the center side of the washing tub, dispersion of force from the stirring blade to the outer peripheral direction is reduced, so that power consumption can be reduced, and movement of clothing becomes complicated and washing unevenness can be reduced. .
[0016]
According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the protrusion has a substantially inclined surface facing the rotation direction. Unevenness of washing can be reduced by moving toward the upper part of the washing tub.
[0017]
The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the protruding portion has a side surface on the outer peripheral side thereof as an inclined surface inclined toward the rotation center axis side, and is stirred. When the wing rotates, the garment has a gap between the protruding portion and the washing tub, so that the garment is caught and does not become resistance, the resistance to the protruding portion is reduced, and the power consumption can be reduced.
[0018]
The invention according to claim 6 is the invention according to any one of claims 3 to 5, wherein the projecting portion is formed by forming a substantially vertical surface at a connection portion with the base, and the stirring blade rotates. When the water flow is caused and the amount of clothing is small, the washing effect by the water flow can be ensured even when the protruding portion is difficult to function on the clothing .
[0019]

【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0020]
Example 1
As shown in FIG. 3, the washing and dehydrating tub (washing tub) 1 has a stirring blade 2 rotatably disposed at the center bottom. The water tank 3 contains the washing / dehydration tank 1, and a substrate 4 is fixed to the outer bottom of the water tank 3, and a motor 5, a drain valve device 6, a washing / dehydration switching mechanism 7, etc. are provided. The outer edge of the outer frame 10 is supported by hanging from the upper corners of the outer frame 10 via the vibration isolator 8 and the suspension rod 9. An upper cover 11 is provided on the upper portion of the outer frame 10, and a water supply valve 12, a power switch 13, a control device 14 and the like are disposed.
[0021]
As shown in FIGS. 1 and 2, the stirring blade 2 has a hemispherical portion in which the central portion of the upper surface 15 is raised on a spherical surface, and the base surface 16 is lowered toward the outer peripheral direction, and is lowered by a certain distance. Thus, the base surface 16 becomes a horizontal surface 17, and a base 20 is formed with a curved surface that rises in the outer peripheral direction from approximately the middle point between the central portion 18 and the outer peripheral portion 19, and the central portion 18 is formed on the base 20. A substantially rectangular parallelepiped protruding portion 21 is formed on the outer periphery of the outer peripheral portion 19 in the vicinity of a substantially intermediate point.
[0022]
The number n, the height h, and the width w of the protrusions 21 vary depending on the radius r of the base 20 of the stirring blade 2 and the washing capacity of the washing machine, but when the number n = 3, the height h is 20 of the radius r. Good results were obtained when it was in the range of -30%. As for the width w, the larger the distance between the protrusions 21 is, the more effective it is to catch clothes.
[0023]
In the above configuration, the operation will be described with reference to FIGS. The agitating blade 2 is reversed to right rotation-pause-left rotation... And rotated at a low speed of about 120 rotations per minute.
[0024]
The washing effect on the clothes is roughly divided into two effects, that is, the effect of the water flow generated by the rotation of the stirring blades 2 and the effect of moving the clothes by the resistance force generated between the clothes and the stirring blades 2.
[0025]
When the stirring blade 2 configured as described above is rotated, the portion between the central portion 18 of the central portion of the base 20 of the stirring blade 2 and the substantially middle point of the outer peripheral portion 19 is formed only by the base surface 16. Because there is no resistance against the clothing, the clothing is not moved by being caught.
[0026]
Next, as shown in FIG. 4, the clothing 23 immersed in the water 22 enters between the protrusions 21 at the outer peripheral portion 19 from the substantially middle point between the central portion 18 and the outer peripheral portion 19 of the base 20 of the stirring blade 2. Therefore, as shown in FIG. 5, the clothing can be moved with almost no rotational phase difference between the stirring blade 2 and the clothing 23. In FIG. 5, the solid line a indicates the movement of the stirring blade, and the dotted line b indicates the movement of the clothing 23 with respect to the movement of the stirring blade.
[0027]
Thus, the stirring blade 2 is formed only by the base surface 16 between the central portion 18 and the outer peripheral portion 19 at the central portion of the base 20, and is substantially at the intermediate point between the central portion 18 and the outer peripheral portion 19. Since the substantially rectangular parallelepiped protrusion 21 is formed on the outer periphery rather than the vicinity, there is no rotational phase difference between the clothing and the stirring blade 2 from the start, and the clothing is stirred even after the stirring blade 2 stops rotating. It becomes easy to follow the rotation of the blade 2. For this reason, the excess cloth circumference can be reduced, and the damage to the cloth and the tangling of the cloth can be reduced.
[0028]
As for the cleaning performance, since there is no mechanical force transmission loss due to the rotation phase with the clothes in the conventional stirring blade 2, the water flow is infinitely reversed (for example, 1.0 sec on-0.6 sec off), low rotation Equivalent performance is obtained with a number (eg, 90 revolutions per minute).
[0029]
In this embodiment, the stirring blade 2 of the fully automatic washing machine disposed at the bottom of the washing and dewatering tub 1 is described as an example. The same effect can be obtained even if it is added to the tank.
[0030]
Further, in the present embodiment, the stirring blade 2 forms the substantially rectangular parallelepiped protruding portion 21 on the base 20 from the outer periphery rather than near the middle point between the center portion 18 and the outer peripheral portion 19. In addition to the substantially rectangular parallelepiped shape, the portion 21 can obtain the same effects even if it has a substantially polyhedral shape, a substantially polygonal pyramid shape, a substantially cylindrical shape, a substantially conical shape, or the like.
[0031]
(Example 2)
As shown in FIGS. 6 to 8, the stirring blade 2 a is formed by only the base surface 16 between the central portion 18 of the center portion of the base 20 and the substantially intermediate point of the outer peripheral portion 19, and the central portion 18 and the outer peripheral portion. A projecting portion 27 having a substantially flat portion 26 having a ridge line 25 opposite to the rotation shaft 24 and parallel to the rotation shaft 24 is formed on the outer periphery rather than near the middle point of 19. Other configurations are the same as those of the first embodiment.
[0032]
In the above configuration, when the stirring blade 2a is rotated, the center portion 18 of the central portion of the base 20 of the stirring blade 2a and the outer peripheral portion 19 are formed only by the base surface 16; Since there is no resistance against the clothing at the portion, the clothing is not caught and moved, and the clothing is placed between the protruding portions 21 at the outer peripheral portion 19 from approximately the middle point between the center portion 18 and the outer peripheral portion 19 of the base 20. Therefore, the clothes can be moved with almost no rotational phase difference between the stirring blade 2a and the clothes.
[0033]
Accordingly, there is no rotational phase difference between the clothing and the stirring blade 2a from the time of activation, and the clothing can easily follow the rotation of the stirring blade 2a even after the stirring blade 2a stops rotating. For this reason, the excess cloth circumference can be reduced, and the damage to the cloth and the tangling of the cloth can be reduced.
[0034]
Furthermore, since the protrusion 27 has a substantially flat portion 26 inclined with respect to the rotation direction, when the stirring blade 2a is rotated in the direction of arrow A in FIG. The force to move in the outer peripheral direction does not work, but the force to move in the central axis direction works. Therefore, the clothes are liable to move closer to the stirring blade 2a, the resistance between the washing and dewatering tank 1 and the clothes is reduced, and the power consumption can be reduced.
[0035]
(Example 3)
As shown in FIGS. 9 to 11, the stirring blade 2 b is formed by only the base surface 16 between the central portion 18 of the center portion of the base 20 and the substantially intermediate point of the outer peripheral portion 19, and the central portion 18 and the outer peripheral portion. A projecting portion 30 having a substantially flat portion 29 having a ridge line 28 that is opposed to and is not parallel to the rotating shaft 24 is formed on the outer periphery rather than in the vicinity of the substantially middle point 19. The angle of the ridge line 28 is about 50 to 70 degrees with respect to the horizontal plane. Other configurations are the same as those of the first embodiment.
[0036]
In the above configuration, when the stirring blade 2b is rotated, the center portion 18 of the central portion of the base 20 of the stirring blade 2b and the outer peripheral portion 19 are formed only by the base surface 16; Since there is no resistance against the garment at the part, the garment is not caught and moved, and the garment is placed between the protrusions 30 at the outer peripheral part 19 from the middle point between the center part 18 and the outer peripheral part 19 of the base 20 Therefore, the clothes can be moved with almost no rotational phase difference between the stirring blade 2b and the clothes.
[0037]
Accordingly, there is no rotational phase difference between the clothing and the stirring blade 2b from the start, and the clothing can easily follow the rotation of the stirring blade 2b even after the stirring blade 2b stops rotating. For this reason, the excess cloth circumference can be reduced, and the damage to the cloth and the tangling of the cloth can be reduced.
[0038]
Further, since the protruding portion 30 has a substantially flat portion 29 inclined with respect to the rotation direction, when the stirring blade 2 b is rotated in the direction of arrow A in FIG. 9, the clothing is indicated by arrow B in FIGS. 9 and 10. Thus, the force that moves toward the outer peripheral direction does not work, and the force that moves toward the center of the washing and dewatering tub 1 works.
[0039]
Accordingly, the clothes are liable to move closer to the stirring blade 2b, the resistance between the washing and dewatering tank 1 and the clothes is reduced, and the power consumption can be reduced. Moreover, washing | cleaning nonuniformity can be reduced because clothing is going to move to the center direction of the washing and dewatering tank 1.
[0040]
Example 4
As shown in FIGS. 12 to 14, the stirring blade 2 c is formed by only the base surface 16 between the central portion 18 of the center portion of the base 20 and the substantially middle point of the outer peripheral portion 19, and the central portion 18 and the outer peripheral portion. A protrusion 32 having a substantially inclined surface 31 opposed to the rotation direction is formed on the outer periphery rather than near the middle point of 19. The angle of the substantially inclined surface 28 is about 70 degrees. Other configurations are the same as those of the first embodiment.
[0041]
In the above configuration, when the stirring blade 2c is rotated, the center portion 18 of the central portion of the base 20 of the stirring blade 2c and the outer peripheral portion 19 are formed only by the base surface 16; Since there is no resistance against the garment at the part, the garment is not caught and moved. Therefore, the clothes can be moved with almost no rotational phase difference between the stirring blade 2c and the clothes.
[0042]
Therefore, there is no rotational phase difference between the clothing and the stirring blade 2c from the start, and the clothing can easily follow the rotation of the stirring blade 2c even after the stirring blade 2c stops rotating. For this reason, the excess cloth circumference can be reduced, and the damage to the cloth and the tangling of the cloth can be reduced.
[0043]
Furthermore, since the protrusion 32 has a substantially inclined surface 31 that is inclined with respect to the rotational direction, when the stirring blade 2c is rotated in the direction of arrow A in FIG. As shown in FIG. 2, a force that moves toward the upper portion of the washing and dewatering tub 1 works. Therefore, the resistance to the protrusion part 32 of clothing decreases and power consumption can also be reduced. Moreover, washing | cleaning unevenness can be reduced because clothing is going to move to the upper direction of the washing and dewatering tank 1.
[0044]
(Example 5)
As shown in FIGS. 15 and 16, the stirring blade 2 d is formed by only the base surface 16 between the central portion 18 of the center portion of the base 20 and the substantially intermediate point of the outer peripheral portion 19, and the central portion 18 and the outer peripheral portion. A protrusion 34 having a substantially inclined surface 33 that inclines the side surface on the outer peripheral side toward the rotation center axis side from the outer periphery rather than near the middle point of 19 is formed. The angle of the substantially inclined surface 33 is determined by the shape of the bottom of the washing and dewatering tub 1 and the torque of the motor 5, but is about 80 degrees with respect to the horizontal plane. Other configurations are the same as those of the first embodiment.
[0045]
In the above configuration, when the stirring blade 2d is rotated, the center portion 18 of the central portion of the base 20 of the stirring blade 2d and the outer peripheral portion 19 are formed only by the base surface 16; Since there is no resistance against the garment at the part, the garment is not caught and moved. Therefore, the clothes can be moved with almost no rotational phase difference between the stirring blade 2d and the clothes.
[0046]
Accordingly, there is no rotational phase difference between the clothing and the stirring blade 2d from the start, and the clothing can easily follow the rotation of the stirring blade 2d even after the stirring blade 2d stops rotating. For this reason, the excess cloth circumference can be reduced, and the damage to the cloth and the tangling of the cloth can be reduced.
[0047]
Further, since the protruding portion 34 has a substantially inclined surface 33 inclined toward the rotation center axis side on the outer peripheral side surface, when the agitating blade 2d rotates, the clothes are separated by a gap between the protruding portion 34 and the washing / dehydrating tub 1. Therefore, clothing is not caught and resistance does not occur, resistance to the protrusion 34 is reduced, and power consumption can be reduced.
[0048]
(Example 6)
As shown in FIGS. 17 to 19, the stirring blade 2 e is formed by only the base surface 16 between the central portion 18 of the center portion of the base 20 and the substantially middle point of the outer peripheral portion 19, and the central portion 18 and the outer peripheral portion. A projecting portion 36 having a substantially vertical surface 35 is formed at the connection portion with the base 20 from the outer periphery rather than near the middle point of 19. If the height of the substantially vertical surface 35 is about 20% with respect to the height of the protrusion 36, the effect of the protrusion 36 is not greatly impaired. Other configurations are the same as those of the first embodiment.
[0049]
In the above configuration, when the stirring blade 2e is rotated, the space between the center portion 18 of the central portion of the base 20 of the stirring blade 2e and the substantially middle point of the outer peripheral portion 19 is formed only by the base surface 16, so this Since there is no resistance against the garment at the part, the garment is not caught and moved. Therefore, the clothes can be moved with almost no rotational phase difference between the stirring blade 2e and the clothes.
[0050]
Accordingly, there is no rotational phase difference between the clothing and the stirring blade 2e from the start, and the clothing can easily follow the rotation of the stirring blade 2e even after the stirring blade 2e stops rotating. For this reason, the excess cloth circumference can be reduced, and the damage to the cloth and the tangling of the cloth can be reduced.
[0051]
Further, since the protruding portion 36 has a substantially vertical surface 35 at the connection portion with the base 20, when the stirring blade 2 e rotates, a water flow occurs, and when the clothing is small, the protruding portion 36 functions as clothing. Even when it is difficult, a cleaning effect by a water flow can be obtained.
[0052]
(Example 7)
As shown in FIGS. 20 and 21, the stirring blade 2 f is formed by only the base surface 16 between the central portion 18 of the center portion of the base 20 and the substantially intermediate point of the outer peripheral portion 19, and the central portion 18 and the outer peripheral portion. 19 has a protrusion 37 on the outer periphery rather than near the middle point of the wing 19, the height of the protrusion 37 is lower between the protrusions 37, and the wing 38 that extends from the center 18 of the base 20 to the outer periphery 19. have.
[0053]
The highest point of the wing portion 38 is near the middle point between the central portion 18 and the outer peripheral portion 19 of the base 20 and is lowered near the protruding portion 37 so that the effect of the protruding portion 37 is not impaired. Results are coming out. Further, the shape of the wing portion 38 varies depending on the intended clothing. Other configurations are the same as those of the first embodiment.
[0054]
In the above configuration, when the stirring blade 2f is rotated, clothing enters between the protruding portions 34 from the substantially middle point between the center portion 18 and the outer peripheral portion 19 of the base 20 to the outer peripheral portion 19. The clothes can be moved with almost no rotational phase difference.
[0055]
Accordingly, there is no rotational phase difference between the clothing and the stirring blade 2f from the start, and the clothing can easily follow the rotation of the stirring blade 2f even after the stirring blade 2f stops rotating. For this reason, the excess cloth circumference can be reduced, and the damage to the cloth and the tangling of the cloth can be reduced.
[0056]
Furthermore, the water flow effect by the blades 38 between the protrusions 37 is obtained, and the rotational phase difference between the stirring blades 2f and the clothing that occurs when stirring is started and when the stirring is stopped is reduced, thereby preventing the fabric from being twisted or damaged. The cleaning performance can be further improved.
[0057]
(Example 8)
As shown in FIGS. 22 and 23, the stirring blade 2g is formed by only the base surface 16 between the central portion 18 of the center portion of the base 20 and the substantially middle point of the outer peripheral portion 19, and the central portion 18 and the outer peripheral portion. 19 has a projecting portion 39 on the outer periphery rather than near the middle point, and has an inner projecting portion 40 that is lower in height than the projecting portion 39 and located inside the projecting portion 39 between the projecting portions 39. is doing.
[0058]
It is desirable that the inner projecting portion 40 has a shape that does not impair the effect of the outer peripheral side projecting portion 39 and that it is easy to enter clothing that does not function on the outer peripheral side projecting portion 39. Other configurations are the same as those of the first embodiment.
[0059]
In the above configuration, when the stirring blade 2g is rotated, clothing enters between the protrusions 34 at the outer peripheral portion 19 from approximately the middle point between the center portion 18 and the outer peripheral portion 19 of the base 20, so that the stirring blade 2g and the clothing are separated. The clothes can be moved with almost no rotational phase difference.
[0060]
Accordingly, there is no rotational phase difference between the clothing and the stirring blade 2g from the time of startup, and the clothing can easily follow the rotation of the stirring blade 2g even after the stirring blade 2g stops rotating. For this reason, the excess cloth circumference can be reduced, and the damage to the cloth and the tangling of the cloth can be reduced.
[0061]
Further, the inner protrusion 40 between the protrusions 39 amplifies the effect of reducing the rotational phase difference between the stirring blade 2g and the clothes generated at the time of starting stirring and stopping stirring, and further suppressing the kinking and damage of the cloth, Cleaning performance can be improved.
[0062]
【The invention's effect】
As described above, according to the first aspect of the present invention, there is provided a substantially disc-shaped agitating blade rotatably disposed in the washing tub for agitating the laundry clothes , between the central portion and the outer peripheral portion. The upper base surface of the base is configured so as to be a substantially concave curved surface, and a plurality of protrusions are provided on the outer peripheral portion side of the intermediate portion between the central portion and the outer peripheral portion of the base surface and at intervals in the circumferential direction. Formed and having wings that are lower than the protrusions and span from the center to the outer periphery between the protrusions, so that the water flow effect by the wings between the protrusions can be obtained and stirring The rotational phase difference between the stirring blade and the clothing generated at the time of start-up and suspension of stirring can be reduced, and the cleaning performance can be improved while suppressing the kinking and damage of the cloth.
[0063]
According to the second aspect of the present invention, since the projecting portion has a substantially flat portion having a ridge line facing and parallel to the rotation center axis, stirring is performed while bringing the garment toward the rotation center axis. Therefore, the dispersion of force from the stirring blade to the outer circumferential direction is reduced, and the power consumption can be reduced.
[0064]
According to the invention described in claim 3, since the protrusion has the substantially flat portion having the ridge line that faces the rotation center axis and is not parallel to the rotation center axis, the clothing is brought closer to the center side of the washing tub. Since the agitation is performed, the dispersion of force from the agitating blade to the outer circumferential direction is reduced, so that power consumption can be reduced, and the movement of the clothes becomes complicated, and washing unevenness can be reduced.
[0065]
According to the invention described in claim 4, since the projecting portion has a substantially inclined surface that opposes the rotation direction, when the stirring blade rotates, the clothes try to move upward in the washing tub. By doing so, washing unevenness can be reduced.
[0066]
According to the invention described in claim 5, since the protrusion has an inclined surface inclined toward the rotation center axis side on the outer peripheral side, when the stirring blade rotates, the garment protrudes. Since the clearance between the tub and the washing tub is secured, clothing is caught and resistance does not occur, resistance to the protruding portion is reduced, and power consumption can be reduced.
[0067]
Further, according to the invention described in claim 6, since the projecting portion forms a substantially vertical surface at the connection portion with the base, when the stirring blade rotates, a water flow occurs, and when there is little clothing, Even when the protruding portion is difficult to function on clothes, the cleaning effect by the water flow can be secured .
[Brief description of the drawings]
FIG. 1 is a top view of a stirring blade for a washing machine according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the stirring blade for the washing machine. Sectional view [Fig. 4] Fig. 5 is a diagram showing the relation between the stirring blade for the washing machine in the circumferential direction and the relationship with the clothing. [Fig. 5] Time chart showing the movement of the stirring blade for the washing machine and the movement of the clothing [Fig. FIG. 7 is a top view of a stirring blade for a washing machine according to a second embodiment of the present invention. FIG. 7 is a cross-sectional view of the stirring blade for the washing machine. FIG. 10 is a top view of a stirring blade for a washing machine according to a third embodiment of the invention. FIG. 10 is a cross-sectional view of the stirring blade for the washing machine. FIG. 13 is a cross-sectional view of the washing blade for the washing machine according to the fourth embodiment of the present invention. FIG. 14 is a perspective view of the main part of the stirring blade for the washing machine. Of the fifth embodiment FIG. 16 is a cross-sectional view of the washing blade for the washing machine. FIG. 17 is a top view of the washing blade for the washing machine according to the sixth embodiment of the present invention. Cross-sectional view of the wing [FIG. 19] Perspective view of the main part of the agitating blade for the washing machine [FIG. 20] A top view of the agitating blade for the washing machine of the seventh embodiment of the present invention [FIG. FIG. 22 is a top view of a stirring blade for a washing machine according to an eighth embodiment of the present invention. FIG. 23 is a sectional view of a stirring blade for the washing machine. FIG. 24 is a top view of a conventional stirring blade for a washing machine. FIG. 25 is a cross-sectional view of the washing machine stirring blade. FIG. 26 is a time chart showing movement of the washing machine and clothing.
1 Washing and dewatering tub (washing tub)
2 Stirring blade 21 Projection

Claims

A substantially disk-shaped stirring blade that is rotatably disposed in a washing tub for stirring laundry clothes, and the upper base surface of the base is configured so that a substantially concave curved surface is formed between the central portion and the outer peripheral portion. A plurality of projecting portions are formed on the outer peripheral portion side of the intermediate portion between the central portion and the outer peripheral portion of the base surface and spaced in the circumferential direction, and the height between the projecting portions is higher than the projecting portion. A stirring blade for a washing machine having a wing portion that is low and extends from the center to the outer periphery .

The stirring blade for a washing machine according to claim 1, wherein the protrusion has a substantially flat portion having a ridge line facing the rotation center axis and parallel thereto.

The stirring blade for a washing machine according to claim 1, wherein the protruding portion has a substantially flat portion having a ridge line that is opposed to and is not parallel to the rotation center axis.

The stirring blade for a washing machine according to any one of claims 1 to 3, wherein the protruding portion has a substantially inclined surface facing the rotation direction.

The stirring blade for a washing machine according to any one of claims 1 to 4, wherein the protruding portion has a side surface on the outer peripheral side thereof inclined as being inclined toward the rotation center axis side.

The stirring blade for a washing machine according to any one of claims 3 to 5, wherein the protruding portion has a surface in a substantially vertical direction at a connection portion with the base .