JP2004081706A

JP2004081706A - Dishwasher/dryer

Info

Publication number: JP2004081706A
Application number: JP2002249814A
Authority: JP
Inventors: Tatsumi Tomibayashi; 冨林　達実; Yasuhiro Hazamada; 硲田　泰廣; Hiroki Inoue; 井上　博喜; Hiroki Suenaga; 末永　浩己; Yasuaki Sakane; 坂根　安昭; Hirokazu Nishio; 西尾　浩和; Kazuyuki Furukawa; 古川　和志
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2002-08-28
Filing date: 2002-08-28
Publication date: 2004-03-18

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher/dryer having such a mechanism of upper and lower doors associated to be opened/closed as the lower door is rotated larger than the upper door when the door is in the full-closed position but the upper door is rotated larger than the lower door when the door is nearly full-open, using three quadri-joint linkages for the mechanism, and skillfully setting the position of the fixed shaft and the length of links for achieving the above-mentioned complicated motions of the doors. <P>SOLUTION: In the dishwasher/dryer, an upper support shaft and an lower support shaft are horizontally attached to the upper part and the lower part of a front opening of a washing tub, respectively, and the upper door and the lower door are opened/closed, associated with each other, as the doors are connected to each other with association links with the upper and lower support shafts as the centers. When the association links in the upper and lower doors start to open from the closed state of the doors, the rotation speed of the lower door is larger than that of the upper door. When the association links start to close from the open state of the doors, the rotation speed of the upper door is larger than that of the lower door. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、食器洗い乾燥機の改良、特に食器洗い乾燥機の前部開口を開閉するべく設けられた水平軸まわりに回動自在な上部扉と下部扉の開閉運動の円滑化を図った食器洗い乾燥機に関するものである。
【０００２】
【従来の技術】
図６に上記洗浄槽の前部開口の上部及び下部にそれぞれ水平に設けられた上部支持軸及び下部支持軸を中心として互いに後述する連動リンクで連結されることによって互いに連動して開閉する上部扉ＤＣと下部扉ＤＤとを備えてなる従来例１にかかる食器洗い乾燥機の外観を示す。
上記のような食器洗い乾燥機では、上部扉ＤＣと下部扉ＤＤが、所定のリンク機構によって連結されており、一方の扉を開こうとすると、上記リンク機構によって、同時に他方の扉も開く様に構成されている。
また特許文献１（として特開２００１−３２７４５１号公報）には上記のような上下に回動する扉を備えた食器洗い乾燥機の扉構造が開示されている。
【０００３】
【発明が解決しようとする課題】
上記のような食器洗い乾燥機では、内部の水分の漏れを防止するために、図２に示す扉の閉状態では、下部扉の先端が上部扉の先端を外側から押さえている構造となっている。従って、閉状態にある扉を最初に開こうとする場合、上部扉ＤＡと下部扉ＤＢのうち、下部扉ＤＢの方が先に大きく開いて、上部扉ＤＡの開動作を自由にする事が望ましい。
また一方、扉の全開状態では、図４に示すように、下部扉は９０度程度しか開かないが、上部扉は、外部からの視野を広めるために９０度を通り越して更に４５度近く開く構造とする事が望ましい。
従って、扉の回動機構としては、扉の全開に近い位置では、上部扉の方が下部扉より大きく回動するような機構を考える必要がある。
また上記従来例２では、図７に示すように、比較的簡単な４節連鎖を２個使って扉の連動開閉を行なっているが、そのために本発明が目的とするような複雑な機能を盛り込んだ扉の開閉をする事が出来ない。
即ち、連動して開閉する上下の扉が、扉の全閉位置では下部扉が上部扉より大きく回動し、全開近くでは上部扉が下部扉より大きく回動する機構を提案すること、及び、そのために三個の４節連鎖を用い、この固定軸の位置とリンクの長さなどを巧妙に設定して上記のような複雑な扉の動きを達成することが本発明の目的である。
【０００４】
【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が採用する手段は、
食器を載置するかごを収納する洗浄槽と、
上記洗浄層内に供給された水を上記かご内の食器に噴射するための循環手段と、
洗い終わった食器を高温空気にさらして食器を乾燥させる乾燥手段と、
上記洗浄槽の前部開口の上部及び下部にそれぞれ水平に設けられた上部支持軸及び下部支持軸を中心として互いに連動リンクで連結されることによって互いに連動して開閉する上部扉及び下部扉と、
を備えてなる食器洗い乾燥機において、
上記連動リンクが、
上記両扉の閉状態から開き始めるときには、上記下部扉の回動速度が上記上部扉の回動速度より大きく、両扉の開状態から閉じ始めるときには、上記上部扉の回動速度が上記下部扉の回動速度より大きくなる様に設定されてなる食器洗い乾燥機として構成されている。
【０００５】
このリンク機構は、その一例として
上記連動リンクが、
上記上部中心軸及び下部中心軸とはそれぞれ離れた位置にあるそれぞれ固定の第１回動中心軸と第２回動中心軸と、
上記第１中心軸に回動自在に取り付けられ、その一端がその他端に対して上記第１回動軸を中心としてその反対側にある第１リンクと、
上記第２中心軸に回動自在に取り付けられ、、その一端がその他端に対して上記第２回動軸を中心としてその反対側にある第２リンクと、
上記第１リンクの上記一端を上記上部扉に固定の第１中間位置と接続する第３リンクと、
上記第２リンクの上記一端を上記下部扉に固定の第２中間位置と接続する第４リンクと、
上記第１リンクの上記他端と上記第２リンクの上記他端とを接続する第５リンクとを具備し、
上記第１回動中心軸及び上記第２回動中心軸の上記上部中心軸及び下部中心軸の座標（Ｐ１（Ｘ１、Ｙ１）、Ｐ１０（Ｘ２、Ｙ２））に対する座標位置（Ｐ４（Ｘ３、Ｙ３）、Ｐ７（Ｘ４、Ｙ４））、上記第１中間位置と上部中心軸の間の長さＬ１Ａ、第２中間位置と下部中心軸の間の長さＬ１Ｂ、上記第３リンク及び第４リンクの長さＬ２Ａ、Ｌ２Ｂ、上記第１リンクの上記一端から上記第１回動中心軸までの長さＬ３Ａ、上記第２リンクの上記一端から上記第２回動中心軸までの長さＬ３Ｂ、上記第１リンクの上記他端から上記第１回動中心軸までの長さＬ４Ａ、上記第２リンクの上記他端から上記第２回動中心軸までの長さＫ４Ｂ、上記第５リンクの長さＬ５が、
上記両扉の閉状態から開き始めるときには、上記下部扉の回動速度が上記上部扉の回動速度より大きく、両扉の開状態から閉じ始めるときには、上記上部扉の回動速度が上記下部扉の回動速度より大きくなる様に設定されてなるものであっても良い。
【０００６】
さらに具体的には、
上記Ｐ１（Ｘ１、Ｙ１）を原点（０，０）としたとき、
Ｐ１０（Ｘ２、Ｙ２）＝（−３６、３３２）
Ｐ４（Ｘ３、Ｙ３）＝（８５、−７６）
Ｐ７（Ｘ４、Ｙ４）＝（９５、２５６．５）
Ｌ１Ａ＝３７
Ｌ１Ｂ＝５７．３
Ｌ２Ａ＝１３５
Ｌ２Ｂ＝９２．７
Ｌ３Ａ＝６０
Ｌ３Ｂ＝６５
Ｌ４Ａ＝６０
Ｌ４Ｂ＝６５
Ｌ５＝１７０．２
θＡ＝１２７度
θＢ＝３０度
θＣ＝６度
或はその近傍、或はその相似形に近い設定であれば、請求項１の動きを満足する。ここにθＡ、θＢ、θＣは、それぞれ扉が全閉状態における第１アームの初期角度、第３アームの初期角度、第５アームの初期角度である。
なお、上記第１リンクの一端部の上記第３リンクとの接続点に、遊びが設けられていると共に、上記第１リンクと上記第３リンクとの接続点を上記第１リンク−第３リンク間に設けられた第１中間位置の方向に弾性付勢する付勢部材が設けられるように構成することで、よりスムーズな動きが達成される。
【０００７】
【作用】
上部扉と下部扉の連動リンクを、上記両扉の閉状態から開き始めるときには、上記下部扉の回動速度が上記上部扉の回動速度より大きく、両扉の開状態から閉じ始めるときには、上記上部扉の回動速度が上記下部扉の回動速度より大きくなる様に設定することで、連動して開閉する上下の扉が、扉の全閉位置では下部扉が上部扉より大きく回動し、全開近くでは上部扉が下部扉より大きく回動するように構成される。この場合、上記遊びと上記付勢部材により上部扉が、全開したときに本体上部にある棚等の障害物に上扉の全開が阻止されたとしても遊びの範囲内では、下部扉は下方向に全開することができる。
さらに、上述した構成により、例えば、従来と同じ本体高さ５２５ｍｍでありながら６００ｍｍの高さスペースしか無い台所でも上部扉に遊びを設けたことより上部下部扉ともに扉を充分に開けることができ、設置が可能となる。これにより従来例では、７００ｍｍの高さスペースが必要で、設置可能な家庭が国内で８５％であったが、６００ｍｍの高さスペースで良くなることで、設置可能な家庭が９５％以上となる。
【０００８】
【発明の実施の形態】
続いて本発明の一実施形態にかかる食器洗い乾燥機Ａの構造について図を参照して説明する。
ここに図１は、本発明の一実施形態にかかる食器洗い乾燥機Ａの外観図、図２はその側断面図であって、扉が閉じた状態を示すもの。図３は同側断面図であって、扉が途中まで開いた状態を示すもの。第４図は、同側断面図であって、扉が前回の状態のもの、図５は、上記扉の連結機構を示す概念図である。
図２〜図４は、詳細な図面で理解しにくいので、以下の説明は図５の概念図によることとし、主要な部品名称のみを図２〜図４に示す。座標は図５に示すごとく、Ｙ軸は図５の下向きを正とし、Ｘ軸は図５の右向きを正とする。これは便宜的に決めているだけで、任意の方向に取ることができる。
【０００９】
図５に示すようにこの食器洗い乾燥機Ａの上部扉ＤＡは、上部中心軸Ｐ１を中心に矢印Ｙ１の方向に回動する。上記上部中心軸Ｐ１の座標をＰ１（Ｘ１、Ｙ１）とする。この座標は原点であり既知である。
上記上部扉ＤＡに固定された回動中心を第１中間位置Ｐ２と呼び、上記上部中心軸Ｐ１からの距離をＬ１Ａとする。Ｐ１Ｐ２を第１アームＡ１と呼ぶ。
上記第１中間位置Ｐ２に揺動自在に取り付けられたリンクを第３リンクＲ３と呼び、その長さをＬ２Ａとする。
下部扉ＤＢは、下部中心軸Ｐ１０を中心に矢印Ｙ２の方向に回動する。上記下部中心軸Ｐ１０の座標をＰ１０（Ｘ２、Ｙ２）とする。この座標は設計上決まる値であり、既知である。
上記下部扉ＤＢに固定された回動中心を第２中間位置Ｐ９と呼び、上記下部中心軸Ｐ１０からの距離をＬ１Ｂとする。Ｐ９Ｐ１０を第６アームＡ６と呼ぶ。
上記第２中間位置Ｐ９に揺動自在に取り付けられたリンクを第４リンクＲ４と呼び、その長さをＬ２Ｂとする。
【００１０】
上記上部中心軸Ｐ１および下部中心軸Ｐ１０は、設計上決まる位置であるが、更に上記Ｐ１、Ｐ１０とは別の固定の第２回動中心軸Ｐ４、第２回動中心軸Ｐ７も設計上、任意に決めることが出来、この位置座標をＰ４（Ｘ３、Ｙ３）、Ｐ７（Ｘ４、Ｙ４）とする。
上記第１回動中心軸Ｐ４に取り付けられ、図５の紙面に直角の面内で揺動自在のリンクを第１リンクＲ１と呼ぶ。第１リンクＲ１は、その一端部である第２アームＡ２と、その他端である第３アームＡ３からなっており、第２アームＡ２の長さをＬ３Ａ、第３アームＡ３の長さをＬ４Ａとする。
前記第３リンクＲ３の他端Ｐ３は、上記第２アームＡ２の先端と回動自在に連結されている。
【００１１】
上記第２回動中心軸Ｐ７に取り付けられ、図５の紙面に直角の面内で揺動自在のリンクを第２リンクＲ２と呼ぶ。第２リンクＲ２は、その一端部である第５アームＡ５と、その他端である第４アームＡ４からなっており、第５アームＡ５の長さはＬ３Ｂ、第４アームＡ４の長さはＬ４Ｂである。
前記第４リンクＲ４の他端Ｐ８は、上記第５アームＡ５の先端と回動自在に連結されている。
最後に上記第３アームＡ３の先端Ｐ５と第４アームＡ４の先端Ｐ６とは、第５リンクＲ５によって回動自在に連結されており、その長さＰ４Ｐ６はＬ５である。
【００１２】
次に、これらのリンクおよびアームの回動動作について説明する。
上記のように上部中心軸Ｐ１（Ｘ１、Ｙ１）、下部中心軸Ｐ１０（Ｘ２、Ｙ２）、第１回動中心軸Ｐ４（Ｘ３、Ｙ３）、第２回動中心軸Ｐ７（Ｘ４、Ｙ４）を既知（固定）として以下説明するが、Ｐ１を除き、他の３点は種々変化させてそれぞれにおける最適な条件を以下の説明通りに選ぶことができる。
上記の設定において、まず図５の全閉状態から、上部扉ＤＡがθａだけ開いた場合を考える。
すると上部ドアＤＡに固定の第１アームＡ１も、当然ながらθａだけ回動する。
ここにＰ１とＰ４は位置固定され座標が既知であるから、Ｐ１Ｐ４、Ｐ１Ｐ２、Ｐ２Ｐ３、Ｐ３Ｐ４は周知の４節連鎖を構成し、それぞれのリンクの長さＰ１Ｐ２＝Ｌ１Ａ、Ｐ２Ｐ３＝Ｌ２Ａ、Ｐ３Ｐ４＝Ｌ３Ａを与えれば第１アームＡ１がある角度θＡから角度θａだけ回動した時の、第２アームＡ２の回動角θＡ２は周知の手法で計算可能である。この計算は周知であるので、ここでは省略する。また当然ながら、第３アームＡ３の回動角度θＡ３＝θＡ２である。即ち、θＡ３＝θＡ２＝Ｆ１（θＡ、θａ）と表せる。ここにθＡは、固定リンクＰ１Ｐ４に対する第１アームＡ１の初期角度であり、これも予め与えることが出来る。
【００１３】
またＰ４とＰ７は位置固定され座標が既知であるから、Ｐ４Ｐ５、Ｐ５Ｐ６、Ｐ６Ｐ７、Ｐ７Ｐ４は周知の４節連鎖を構成し、それぞれのリンクの長さＰ４Ｐ５＝Ｌ４Ａ、Ｐ５Ｐ６＝Ｌ５、Ｐ６Ｐ７＝Ｌ４Ｂと、固定リンクＰ５Ｐ６に対する第３アームＡ３の初期角度θＢを与えれば、第３アームＡ３がθＡ３だけ回動した時の、第４アームＡ４の回動角θＡ４は周知の手法で計算可能である。この計算は周知であるので、ここでは省略する。また当然ながら、第４アームＡ４の回動角度θＡ４は、第４アームＡ４と一体の第５アームＡ５の回動角度θＡ５と同一である。即ち、θＡ５＝θＡ４＝Ｆ２（θＡ、θａ）と表せる。
【００１４】
更にＰ４とＰ１０は位置固定され座標が既知であるから、Ｐ７Ｐ８、Ｐ８Ｐ９、Ｐ９Ｐ１０、Ｐ１０Ｐ７は周知の４節連鎖を構成し、それぞれのリンクの長さＰ７Ｐ８＝Ｌ３Ｂ、Ｐ８Ｐ９＝Ｌ２Ｂ、Ｐ９Ｐ１０＝Ｌ１Ｂ、及び第５アームＡ５と固定リンクＰ７Ｐ１０との初期角度θＣを与えれば、第５アームＡ５がθＡ５だけ回動した時の、第６アームＡ６の回動角θＡ６は周知の手法で計算可能である。この計算は周知であるので、ここでは省略する。また当然ながら、第６アームＡ６の回動角度θＡ６は、第６アームＡ６と一体の下部扉ＤＢの回動角度θｂと同一である。即ち、θｂ＝Ｆ３（θＡ、θａ）と表せる。
【００１５】
以上述べたところから、上記設定によれば、下部扉ＤＢの回動角度は上部扉ＤＡのその時の角度θＡ（初期角度と呼ぶ）とその回動角度θａとの関数として表され、この関数は第１アームＡ１〜第６アームＡ６、第３リンクＲ３〜第５リンクＲ５の長さの関数で表されることが理解される。
従って、上部扉ＤＡが全閉状態からθａだけ回動した時の下部扉の回動角度θｂをθａ＜θｂにしたい場合には、θＡ；既知の条件のもとで、θａ＜Ｆ３（θａ）を得る第１アームＡ１〜第６アームＡ６、第３リンクＲ３〜第５リンクＲ５を選択すればよいことになる。
このような選択は、上記関数Ｆ３をコンピュータに記憶させておき、これにθＡ＝既知のもとで、第１アームＡ１〜第６アームＡ６、第３リンクＲ３〜第５リンクＲ５のそれぞれを数ミリ刻みで生成したデータを与えて、θａ＜Ｆ３（θａ）となるデータを選択すればよい。このようなデータは複数組得られよう。
【００１６】
また上部扉ＤＡが全開状態近傍でθａだけ回動した時（即ち、θＡを第１アームＡ１が９０度〜１３５度となる値に設定したとき）の下部扉ＤＢの回動角度θｂの関係をθａ＞θｂにしたい場合には、上記θＡに関する既知の条件のもとで、θａ＞Ｆ３（θａ）を得る第１アームＡ１〜第６アームＡ６、第３リンクＲ３〜第５リンクＲ５を選択すればよいことになる。
このような選択も、コンピュータに記憶された上記関数Ｆ３に、θＡに関する条件と、第１アームＡ１〜第６アームＡ６、第３リンクＲ３〜第５リンクＲ５のそれぞれを数ミリ刻みで生成したデータを与えて、θａ＞Ｆ３（θａ）となるデータを選択すればよい。このようなデータも多数組み得られる。
そこで、上記２つの条件下で得られた複数の解データの組のうちで共通の解を選択すれば、それは上扉ＤＡが閉から開き始めるときに下部扉ＤＢの方が早く開き始めると共に、上扉が開に近い状態では、下部扉ＤＢよりも上部扉ＤＡのほうが早く閉じ始めるという二つの条件の両方を満足する解を得ることとなる。
【００１７】
そのような特殊な扉の動きを実現し得る各固定軸の座標と、各リンクの長さと、各４節連鎖の１辺を構成するアームの初期角度の一例を下に記載する。このデータに近い構造の機構或はこれに相似或はそれに近い形状の機構は、扉を上記二つの条件の両方を満足するような動きを達成することができる。
即ち、図５におけるＰ１（Ｘ１、Ｙ１）を原点（０，０）としたとき、
Ｐ１０（Ｘ２、Ｙ２）＝（−３６、３３２）
Ｐ４（Ｘ３、Ｙ３）＝（８５、−７６）
Ｐ７（Ｘ４、Ｙ４）＝（９５、２５６．５）
Ｌ１Ａ＝３７
Ｌ１Ｂ＝５７．３
Ｌ２Ａ＝１３５
Ｌ２Ｂ＝９２．７
Ｌ３Ａ＝６０
Ｌ３Ｂ＝６５
Ｌ４Ａ＝６０
Ｌ４Ｂ＝６５
Ｌ５＝１７０．２
θＡ＝１２７度
θＢ＝３０度
θＣ＝６度
或はその近傍、或はその相似形に近い設定であれば、上記二つの条件を同時に満足する。ここにθＡ、θＢ、θＣは、それぞれ扉が全閉状態における第１アームの初期角度、第３アームの初期角度、第５アームの初期角度である。
ここに、座標は、図５の右方向をＸ軸の正に、下向きにＹ軸の正に取っているが、これは便宜的なものであり、任意の方向に設定できる。
なお、上記第１リンクの一端部の上記第３リンクとの接続点に、遊びが設けられていると共に、上記第１リンクと上記第３リンクとの接続点を上記第１リンクに設けられた第１中間位置の方向に弾性付勢する付勢部材が設けられるように構成することで、よりスムーズな動きが達成される。また、上記遊びと上記付勢部材により上部扉が、全開したときに本体上部にある棚等の障害物に上扉の全開が阻止されたとしても遊びの範囲内では、下部扉は下方向に全開することができる。そして、上部扉と下部扉の連動リンクを、上記両扉の閉状態から開き始めるときには、上記下部扉の回動速度が上記上部扉の回動速度より大きく、両扉の開状態から閉じ始めるときには、上記上部扉の回動速度が上記下部扉の回動速度より大きくなる様に設定することで、連動して開閉する上下の扉が、扉の全閉位置では下部扉が上部扉より大きく回動し、全開近くでは上部扉が下部扉より大きく回動することが達成される。
さらに、上述した構成により、例えば、従来と同じ本体高さ５２５ｍｍでありながら６００ｍｍの高さスペースしか無い台所でも上部扉に遊びを設けたことより上部下部扉ともに扉を充分に開けることができ、設置が可能となる。これにより従来例では、７００ｍｍの高さスペースが必要で、設置可能な家庭が国内で８５％であったが、６００ｍｍの高さスペースで良くなることで、設置可能な家庭が９５％以上となる。
【００１８】
【実施例】
上記実施形態では、閉状態或は開状態での扉の回動角度からその大小を条件としてリンクやアームの長さを決める手法を採用したが、扉の回動速度を求めて、その大小を条件としてみたすリンクやアームの長さを決めても良い。このような計算は、上記角度θと関数Ｆ３の微分を取ればよい。計算は周知であるのでここでは省略する。
【００１９】
【発明の効果】
本発明は以上述べたように構成されているので、
上部扉と下部扉の連動リンクを、上記両扉の閉状態から開き始めるときには、上記下部扉の回動速度が上記上部扉の回動速度より大きく、両扉の開状態から閉じ始めるときには、上記上部扉の回動速度が上記下部扉の回動速度より大きくなる様に設定することで、連動して開閉する上下の扉が、扉の全閉位置では下部扉が上部扉より大きく回動し、全開近くでは上部扉が下部扉より大きく回動するように構成される。また、上部扉とリンクしている接続点に遊び設けていることとバネ等による付勢部材により上部扉が、全開したときに本体上部にある棚等の障害物に上扉の全開が阻止されたとしても遊びの範囲内では、下部扉は下方向に全開するように構成されている。
【図面の簡単な説明】
【図１】本発明の一実施形態にかかる食器洗い乾燥機の外観図。
【図２】一実施形態にかかる食器洗い乾燥機の扉部分の側断面図（扉閉じの状態）。
【図３】一実施形態にかかる食器洗い乾燥機の扉部分の側断面図（扉中間開の状態）。
【図４】一実施形態にかかる食器洗い乾燥機の扉部分の側断面図（扉全開の状態）。
【図５】一実施形態にかかる食器洗い乾燥機の扉回動機構を模式的に表した図。
【図６】従来の食器洗い乾燥機の外観図
【図７】従来の食器洗い乾燥機の側面図
【符号の説明】
Ｐ１　上部中心軸
Ｐ２　第１中間位置
Ｐ３　接点
Ｐ４　第１回動中心軸
Ｐ５　接点
Ｐ６　接点
Ｐ７　第２回動中心軸
Ｐ８　接点
Ｐ９　第２中間位置
Ｐ１０　下部中心軸
Ｌ１Ａ〜Ｌ４Ａ　長さ
Ｌ１Ｂ〜Ｌ４Ｂ　長さ
Ｌ５　長さ
Ａ１〜Ａ６　第１アーム〜第６アーム
ＤＡ　上部扉
ＤＢ　下部扉[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dishwasher, and more particularly to a dishwasher that facilitates opening and closing movements of an upper door and a lower door that are rotatable around a horizontal axis provided to open and close a front opening of the dishwasher. It is about.
[0002]
[Prior art]
FIG. 6 shows an upper door that opens and closes in conjunction with each other by being connected to each other by an interlocking link, which will be described later, about an upper support shaft and a lower support shaft that are horizontally provided above and below the front opening of the cleaning tank, respectively. 1 shows an appearance of a dishwasher / dryer according to Conventional Example 1 including a DC and a lower door DD.
In the above dishwasher / dryer, the upper door DC and the lower door DD are connected by a predetermined link mechanism. When one door is to be opened, the other door is simultaneously opened by the link mechanism. It is configured.
Patent Document 1 (Japanese Patent Application Laid-Open No. 2001-327451) discloses a door structure of a dishwasher provided with a door that rotates up and down as described above.
[0003]
[Problems to be solved by the invention]
In the dishwasher as described above, in order to prevent the leakage of water inside, in the closed state of the door shown in FIG. 2, the tip of the lower door presses the tip of the upper door from the outside. . Therefore, when the door in the closed state is to be opened first, the lower door DB of the upper door DA and the lower door DB is opened wider first, and the opening operation of the upper door DA is free. desirable.
On the other hand, when the door is fully opened, as shown in FIG. 4, the lower door opens only about 90 degrees, but the upper door opens more than 45 degrees past 90 degrees to widen the field of view from the outside. It is desirable to do.
Accordingly, it is necessary to consider a mechanism for rotating the door such that the upper door rotates more than the lower door at a position near the fully opened position of the door.
Further, in the above-mentioned conventional example 2, as shown in FIG. 7, two relatively simple four-bar chains are used to open and close the door in an interlocking manner. I can't open and close the door that I put in.
That is, to propose a mechanism in which the upper and lower doors that open and close in conjunction with each other, the lower door rotates more than the upper door at the fully closed position of the door, and the upper door rotates more than the lower door near the fully open position, and For this purpose, it is an object of the present invention to achieve the above-described complicated door movement by using three four-bar chains and skillfully setting the position of the fixed shaft and the length of the link.
[0004]
[Means for Solving the Problems]
Means adopted by the present invention to achieve the above object is:
A washing tank that stores a basket on which tableware is placed,
Circulating means for injecting the water supplied into the washing layer to the dishes in the basket,
Drying means for drying the dishes by exposing the washed dishes to high-temperature air;
An upper door and a lower door that open and close in conjunction with each other by being connected to each other by an interlocking link about an upper support shaft and a lower support shaft that are horizontally provided at upper and lower portions of the front opening of the washing tank, respectively;
In the dishwasher comprising:
The link above is
When starting to open from the closed state of both doors, the rotation speed of the lower door is greater than the rotation speed of the upper door, and when starting to close from the open state of both doors, the rotation speed of the upper door is lower than the lower door. It is configured as a dishwasher and dryer that is set to be faster than the rotation speed of the dishwasher.
[0005]
In this link mechanism, as an example, the interlocking link is
A fixed first rotation center axis and a second rotation center axis which are respectively located at positions separated from the upper center axis and the lower center axis;
A first link rotatably attached to the first central shaft, one end of which is opposite to the other end with respect to the first rotational axis about the first pivot shaft;
A second link rotatably attached to the second central shaft, one end of which is on the opposite side to the other end with respect to the second rotational axis as a center;
A third link connecting the one end of the first link to a first intermediate position fixed to the upper door;
A fourth link connecting the one end of the second link to a second intermediate position fixed to the lower door,
A fifth link connecting the other end of the first link and the other end of the second link,
A coordinate position (P4 (X3, Y3) with respect to coordinates (P1 (X1, Y1), P10 (X2, Y2)) of the upper central axis and the lower central axis of the first rotation center axis and the second rotation center axis. ), P7 (X4, Y4)), the length L1A between the first intermediate position and the upper central axis, the length L1B between the second intermediate position and the lower central axis, the third link and the fourth link. Lengths L2A and L2B, a length L3A from the one end of the first link to the first rotation center axis, a length L3B from the one end of the second link to the second rotation center axis, Length L4A from the other end of one link to the first rotation center axis, length K4B from the other end of the second link to the second rotation center axis, length L5 of the fifth link But,
When starting to open from the closed state of both doors, the rotation speed of the lower door is greater than the rotation speed of the upper door, and when starting to close from the open state of both doors, the rotation speed of the upper door is lower than the lower door. The rotation speed may be set to be higher than the rotation speed.
[0006]
More specifically,
When the above P1 (X1, Y1) is set to the origin (0, 0),
P10 (X2, Y2) = (− 36, 332)
P4 (X3, Y3) = (85, -76)
P7 (X4, Y4) = (95, 256.5)
L1A = 37
L1B = 57.3
L2A = 135
L2B = 92.7
L3A = 60
L3B = 65
L4A = 60
L4B = 65
L5 = 170.2
θA = 127 degrees θB = 30 degrees θC = 6 degrees or its vicinity, or a setting close to its similar shape, the movement of claim 1 is satisfied. Here, θA, θB, and θC are the initial angle of the first arm, the initial angle of the third arm, and the initial angle of the fifth arm when the door is fully closed, respectively.
A play is provided at a connection point between the one end of the first link and the third link, and a connection point between the first link and the third link is defined as the first link-third link. A smoother movement can be achieved by providing an urging member that elastically urges in the direction of the first intermediate position provided therebetween.
[0007]
[Action]
When starting to open the interlocking link between the upper door and the lower door from the closed state of the two doors, the rotation speed of the lower door is greater than the rotation speed of the upper door, and when starting to close from the open state of both doors, By setting the rotation speed of the upper door to be higher than the rotation speed of the lower door, the upper and lower doors that open and close in conjunction with each other, the lower door rotates more than the upper door at the fully closed position of the door. Near the full opening, the upper door is configured to rotate more than the lower door. In this case, even if the upper door is fully opened by an obstacle such as a shelf at the upper part of the main body when the upper door is fully opened by the play and the biasing member, the lower door is directed downward within the range of the play. Can be fully opened.
Furthermore, with the above-described configuration, for example, even in a kitchen having the same main body height of 525 mm as in the past but having a space of only 600 mm, the upper and lower doors can be fully opened by providing play on the upper door, Installation becomes possible. Thus, in the conventional example, a height space of 700 mm is required, and homes that can be installed are 85% in Japan. However, if a height space of 600 mm is sufficient, homes that can be installed will be 95% or more. .
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, the structure of the dishwasher A according to one embodiment of the present invention will be described with reference to the drawings.
Here, FIG. 1 is an external view of a dishwasher A according to an embodiment of the present invention, and FIG. 2 is a side sectional view showing a state in which a door is closed. FIG. 3 is a sectional side view of the same, showing a state where the door is partially opened. FIG. 4 is a sectional side view of the same, in which the door is in a previous state, and FIG. 5 is a conceptual diagram showing a connecting mechanism of the door.
Since FIGS. 2 to 4 are difficult to understand with detailed drawings, the following description is based on the conceptual diagram of FIG. 5 and only main component names are shown in FIGS. As for the coordinates, as shown in FIG. 5, the Y axis is positive when the downward direction in FIG. 5 is positive, and the X axis is positive when the right direction in FIG. 5 is positive. This can be taken in any direction, for convenience only.
[0009]
As shown in FIG. 5, the upper door DA of the dishwasher A rotates in the direction of arrow Y1 about the upper central axis P1. The coordinates of the upper central axis P1 are P1 (X1, Y1). This coordinate is the origin and is known.
The center of rotation fixed to the upper door DA is called a first intermediate position P2, and the distance from the upper central axis P1 is L1A. P1P2 is called a first arm A1.
The link swingably attached to the first intermediate position P2 is called a third link R3, and its length is L2A.
The lower door DB rotates about the lower central axis P10 in the direction of arrow Y2. The coordinates of the lower central axis P10 are defined as P10 (X2, Y2). These coordinates are values determined by design and are known.
The center of rotation fixed to the lower door DB is called a second intermediate position P9, and the distance from the lower central axis P10 is L1B. P9P10 is called a sixth arm A6.
The link swingably attached to the second intermediate position P9 is called a fourth link R4, and its length is L2B.
[0010]
Although the upper central axis P1 and the lower central axis P10 are positions determined by design, the fixed second rotational center axis P4 and the second rotational central axis P7, which are fixed separately from the P1 and P10, are also designed. The position coordinates can be arbitrarily determined, and the position coordinates are P4 (X3, Y3) and P7 (X4, Y4).
The link attached to the first rotation center axis P4 and swingable in a plane perpendicular to the plane of FIG. 5 is referred to as a first link R1. The first link R1 includes a second arm A2 at one end thereof and a third arm A3 at the other end. The length of the second arm A2 is L3A, and the length of the third arm A3 is L4A. I do.
The other end P3 of the third link R3 is rotatably connected to the tip of the second arm A2.
[0011]
The link attached to the second rotation center axis P7 and swingable in a plane perpendicular to the plane of FIG. 5 is referred to as a second link R2. The second link R2 includes a fifth arm A5 at one end thereof and a fourth arm A4 at the other end. The length of the fifth arm A5 is L3B, and the length of the fourth arm A4 is L4B. is there.
The other end P8 of the fourth link R4 is rotatably connected to the tip of the fifth arm A5.
Finally, the tip P5 of the third arm A3 and the tip P6 of the fourth arm A4 are rotatably connected by a fifth link R5, and the length P4P6 is L5.
[0012]
Next, the rotation operation of these links and arms will be described.
As described above, the upper center axis P1 (X1, Y1), the lower center axis P10 (X2, Y2), the first rotation center axis P4 (X3, Y3), and the second rotation center axis P7 (X4, Y4). Explained below as known (fixed), except for P1, the other three points can be variously changed and the optimum conditions for each can be selected as described below.
In the above setting, first, consider the case where the upper door DA is opened by θa from the fully closed state in FIG.
Then, the first arm A1 fixed to the upper door DA also naturally rotates by θa.
Here, since P1 and P4 are fixed in position and the coordinates are known, P1P4, P1P2, P2P3, and P3P4 form a well-known four-node chain, and the lengths of the respective links P1P2 = L1A, P2P3 = L2A, P3P4 = L3A , The rotation angle θA2 of the second arm A2 when the first arm A1 rotates from the certain angle θA by the angle θa can be calculated by a known method. Since this calculation is well known, it is omitted here. In addition, the rotation angle θA3 of the third arm A3 = θA2. That is, θA3 = θA2 = F1 (θA, θa). Here, θA is the initial angle of the first arm A1 with respect to the fixed link P1P4, which can also be given in advance.
[0013]
Since P4 and P7 are fixed in position and have known coordinates, P4P5, P5P6, P6P7, and P7P4 form a well-known four-node chain, and have link lengths P4P5 = L4A, P5P6 = L5, and P6P7 = L4B. Given the initial angle θB of the third arm A3 with respect to the fixed link P5P6, the rotation angle θA4 of the fourth arm A4 when the third arm A3 rotates by θA3 can be calculated by a known method. Since this calculation is well known, it is omitted here. The rotation angle θA4 of the fourth arm A4 is, of course, the same as the rotation angle θA5 of the fifth arm A5 integrated with the fourth arm A4. That is, θA5 = θA4 = F2 (θA, θa).
[0014]
Further, since P4 and P10 are fixed in position and the coordinates are known, P7P8, P8P9, P9P10, and P10P7 form a well-known four-node chain, and the lengths of the respective links P7P8 = L3B, P8P9 = L2B, P9P10 = L1B, Given the initial angle θC between the fifth arm A5 and the fixed link P7P10, the rotation angle θA6 of the sixth arm A6 when the fifth arm A5 rotates by θA5 can be calculated by a known method. Since this calculation is well known, it is omitted here. The rotation angle θA6 of the sixth arm A6 is, of course, the same as the rotation angle θb of the lower door DB integrated with the sixth arm A6. That is, θb = F3 (θA, θa).
[0015]
As described above, according to the above setting, the rotation angle of the lower door DB is expressed as a function of the angle θA (referred to as an initial angle) of the upper door DA at that time and the rotation angle θa. It is understood that the distance is represented by a function of the length of the first arm A1 to the sixth arm A6, the third link R3 to the fifth link R5.
Therefore, when it is desired that the rotation angle θb of the lower door when the upper door DA rotates by θa from the fully closed state is set to θa <θb, θA; θa <F3 (θa) under known conditions. In this case, the first arm A1 to the sixth arm A6, and the third link R3 to the fifth link R5 may be selected.
For such a selection, the above function F3 is stored in a computer, and θA = the number of the first arm A1 to the sixth arm A6 and the number of the third link R3 to the fifth link R5 are determined based on the known θA. Data generated in millimeter increments may be given to select data satisfying θa <F3 (θa). Multiple sets of such data could be obtained.
[0016]
The relationship between the rotation angle θb of the lower door DB and the rotation angle θb of the lower door DB when the upper door DA is rotated by θa in the vicinity of the fully opened state (ie, when θA is set to a value in which the first arm A1 is 90 degrees to 135 degrees). When it is desired to satisfy θa> θb, the first arm A1 to the sixth arm A6 and the third link R3 to the fifth link R5 that obtain θa> F3 (θa) are selected under the known condition regarding θA. It would be good.
Such a selection is also made by adding the condition regarding θA and the data generated by generating the first arm A1 to the sixth arm A6 and the third link R3 to the fifth link R5 at intervals of several millimeters in the function F3 stored in the computer. And the data satisfying θa> F3 (θa) may be selected. Many such data sets can be obtained.
Therefore, if a common solution is selected from among a plurality of solution data sets obtained under the above two conditions, when the upper door DA starts to open from closed, the lower door DB starts to open earlier, In a state where the upper door is almost open, a solution that satisfies both of the two conditions that the upper door DA starts closing earlier than the lower door DB is obtained.
[0017]
An example of the coordinates of each fixed axis capable of realizing such a special door movement, the length of each link, and the initial angle of the arm constituting one side of each four-bar chain is described below. A mechanism having a structure close to this data or a mechanism similar to or similar to this data can achieve the movement of the door so as to satisfy both of the above two conditions.
That is, when P1 (X1, Y1) in FIG. 5 is set to the origin (0, 0),
P10 (X2, Y2) = (− 36, 332)
P4 (X3, Y3) = (85, -76)
P7 (X4, Y4) = (95, 256.5)
L1A = 37
L1B = 57.3
L2A = 135
L2B = 92.7
L3A = 60
L3B = 65
L4A = 60
L4B = 65
L5 = 170.2
θA = 127 degrees θB = 30 degrees θC = 6 degrees or near or a setting close to the similar form, the above two conditions are simultaneously satisfied. Here, θA, θB, and θC are the initial angle of the first arm, the initial angle of the third arm, and the initial angle of the fifth arm when the door is fully closed, respectively.
Here, the coordinates are set such that the right direction in FIG. 5 is positive on the X axis and downward is positive on the Y axis, but this is for convenience and can be set in any direction.
In addition, a play is provided at a connection point of the one end of the first link with the third link, and a connection point between the first link and the third link is provided on the first link. By providing a biasing member that elastically biases in the direction of the first intermediate position, smoother movement is achieved. Also, even if the upper door is fully opened by the play and the biasing member, the upper door is prevented from being fully opened by an obstacle such as a shelf at the upper part of the main body, but within the range of the play, the lower door moves downward. Can be fully opened. When the interlocking link between the upper door and the lower door starts to open from the closed state of both doors, when the rotation speed of the lower door is greater than the rotation speed of the upper door, and when the doors start closing from the open state of both doors. By setting the rotation speed of the upper door to be higher than the rotation speed of the lower door, the upper and lower doors that open and close in conjunction with each other can be rotated more than the upper door in the fully closed position of the door. And the upper door pivots more than the lower door near full open.
Furthermore, with the above-described configuration, for example, even in a kitchen having the same main body height of 525 mm as in the past but having a space of only 600 mm, the upper and lower doors can be fully opened by providing play on the upper door, Installation becomes possible. Thus, in the conventional example, a height space of 700 mm is required, and homes that can be installed are 85% in Japan. However, if a height space of 600 mm is sufficient, homes that can be installed will be 95% or more. .
[0018]
【Example】
In the above embodiment, the method of determining the length of the link or the arm on the condition of the size of the door from the rotation angle of the door in the closed state or the open state is adopted.However, the rotation speed of the door is obtained, and the size is determined. The length of the link or arm to be used may be determined as a condition. Such a calculation may be performed by taking the derivative of the angle θ and the function F3. Since the calculation is well known, the description is omitted here.
[0019]
【The invention's effect】
Since the present invention is configured as described above,
When starting to open the interlocking link between the upper door and the lower door from the closed state of the two doors, the rotation speed of the lower door is greater than the rotation speed of the upper door, and when starting to close from the open state of both doors, By setting the rotation speed of the upper door to be higher than the rotation speed of the lower door, the upper and lower doors that open and close in conjunction with each other, the lower door rotates more than the upper door at the fully closed position of the door. Near the full opening, the upper door is configured to rotate more than the lower door. In addition, when the upper door is fully opened, the upper door is prevented from being fully opened by an obstacle such as a shelf at the upper part of the main body when the upper door is fully opened by providing a play at a connection point linked with the upper door. Even if it is within the range of play, the lower door is configured to fully open downward.
[Brief description of the drawings]
FIG. 1 is an external view of a dishwasher according to an embodiment of the present invention.
FIG. 2 is a side sectional view of a door portion of the dishwasher according to the embodiment (in a state where the door is closed).
FIG. 3 is a side sectional view of a door portion of the dishwasher according to the embodiment (a state in which the door is intermediately opened).
FIG. 4 is a side sectional view of a door portion of the dishwasher according to the embodiment (when the door is fully opened).
FIG. 5 is a diagram schematically illustrating a door rotating mechanism of the dishwasher according to the embodiment.
FIG. 6 is an external view of a conventional dish washer / dryer. FIG. 7 is a side view of a conventional dish washer / dryer.
P1 Upper center axis P2 First intermediate position P3 Contact point P4 First rotation center axis P5 Contact P6 Contact P7 Second rotation center axis P8 Contact P9 Second intermediate position P10 Lower center axis L1A to L4A Length L1B to L4B Length L5 Length A1 to A6 First arm to sixth arm DA Upper door DB Lower door

Claims

A washing tank that stores a basket on which tableware is placed,
Circulating means for injecting the water supplied into the washing layer to the dishes in the basket,
Drying means for drying the dishes by exposing the washed dishes to high-temperature air;
An upper door and a lower door that open and close in conjunction with each other by being connected to each other by an interlocking link about an upper support shaft and a lower support shaft that are horizontally provided at upper and lower portions of the front opening of the washing tank, respectively;
In the dishwasher comprising:
The link above is
When starting to open from the closed state of both doors, the rotation speed of the lower door is greater than the rotation speed of the upper door, and when starting to close from the open state of both doors, the rotation speed of the upper door is lower than the lower door. Dishwasher and dryer set to be faster than the rotating speed of the dishwasher.

The link above is
A fixed first rotation center axis and a second rotation center axis which are respectively located at positions separated from the upper center axis and the lower center axis;
A first link rotatably attached to the first central shaft, one end of which is opposite to the other end with respect to the other end with respect to the first rotation shaft;
A second link rotatably attached to the second central axis, one end of which is on the opposite side of the other end about the second rotational axis with respect to the other end;
A third link connecting the one end of the first link to a first intermediate position fixed to the upper door;
A fourth link connecting the one end of the second link to a second intermediate position fixed to the lower door,
A fifth link connecting the other end of the first link and the other end of the second link,
A coordinate position (P4 (X3, Y3) with respect to coordinates (P1 (X1, Y1), P10 (X2, Y2)) of the upper central axis and the lower central axis of the first rotation center axis and the second rotation center axis. ), P7 (X4, Y4)), the length L1A between the first intermediate position and the upper central axis, the length L1B between the second intermediate position and the lower central axis, the third link and the fourth link. Lengths L2A and L2B, a length L3A from the one end of the first link to the first rotation center axis, a length L3B from the one end of the second link to the second rotation center axis, Length L4A from the other end of one link to the first rotation center axis, length L4B from the other end of the second link to the second rotation center axis, and length L5 of the fifth link But,
When starting to open from the closed state of both doors, the rotation speed of the lower door is greater than the rotation speed of the upper door, and when starting to close from the open state of both doors, the rotation speed of the upper door is lower than the lower door. 2. The dishwasher / dryer according to claim 1, wherein the speed is set to be higher than the rotation speed of the dishwasher.

When the above P1 (X1, Y1) is set to the origin (0, 0),
P10 (X2, Y2) = (− 36, 332)
P4 (X3, Y3) = (85, -76)
P7 (X4, Y4) = (95, 256.5)
L1A = 37
L1B = 57.3
L2A = 135
L2B = 92.7
L3A = 60
L3B = 65
L4A = 60
L4B = 65
L5 = 170.2
The dishwasher / dryer according to claim 1, wherein θA = 127 degrees, θB = 30 degrees, θC = 6 degrees, or a vicinity thereof, or a setting similar to the similar shape. Here, θA, θB, and θC are the initial angle of the first arm, the initial angle of the third arm, and the initial angle of the fifth arm when the door is fully closed, respectively.

A play is provided at a connection point of the one end of the first link with the third link, and a connection point between the first link and the third link is provided between the first link and the third link. The dishwasher / dryer according to claim 2, further comprising an urging member that elastically urges in a direction of the provided first intermediate position.