1237085 玖、發明說明： (一） 發明所屬之技術領域 本發明有關一種在彈簧式關門器內組合有油壓制動結構 的雙開式關門器，尤其是有關一種組合有能在一扇門的推 和拉方向上的各個開門的動作過程中，利用開門動作時積 蓄的勢能進行門的關閉動作，而在關門動作作過程中利用 所述積蓄的勢能來限制的急劇關閉的油壓制動結構的、結 構簡單的、且能在門內容納關門器本體的小型雙開式關門 器。 本發明還有關一種在組合有上述制動結構的雙開式關門 器中，組合有一種能在門從〇點位置開始到左右90度以 上的打開位置，能夠.使門的開閉動作在途中暫時停止的自 由停止機構的雙開式關門器。 (二） 先前技術 作爲用來支撐各種商店入口處設置的雙開門的門鉸鏈裝 置，通常使用通過如埋入在天花板中的頂部樞軸裝置中的 樞軸和地板中埋設的底層鉸鏈中的樞軸來支撐門的門鉸鏈 裝置。 已有的這種在兩方向上打開的雙開門由於主要是以埋入 地板中的形式爲主，因此對其進行施工的必要性以及因下 雨和淸掃時需要淸潔劑等不方便的問題經常發生。 另外，已有的雙開用門鉸鏈裝置也有使用彈簧式關門器 的，但都是僅僅依靠彈簧力關閉門的裝置，因而具有急劇 開閉門動作的危險性。再者，現行的中心吊掛式關門器中 -6- 1237085 ，由於是根據彈簧卷緊方向和活塞螺栓的切削螺紋 決定門左右打開@力式的緣古文’医•而不能做成^胃 ，因此也帶來問題。 從這一觀點出發’近來也已經提出了結構比較簡 夠小型化的，設置時露出部分較少的外觀也好看的 彈簧式關門器（專利文獻1)。另外，也已經提出了 爲對門的關閉力進行制動和吸收而採用油壓力調節 閉速度的緩衝器鉸鏈等裝置（專利文獻2)。 【專利文獻1】特許第3 0 2 3 649號 【專利文獻2】特公平7- 1 8 2 9 1號 例如，在專利文獻1中記載了一種彈簧式關門 ，如第17圖所示，在圓筒形的本體外殼102內， 突出的旋轉軸1 04配置成能夠轉動，旋轉軸1 04的 外嵌入螺旋彈簧108，同時還外嵌入有旋轉軸104 和下部的止動部1 06、1 07，使之能在所定的角度 轉動。螺旋彈簧1 0 8的上端被固定在上側的止動部 上’螺旋彈簧1 08的下端被固定在下側的上動部件 。從覆蓋安裝在本體外殼102的上部的安裝板103 在其內側的止動銷103b與上側的止動部件106的 106b連接，從本體外殻102的底板105處突設的止動 與下側的止動部件107的止動部107b連接。並且 的彈簧式關門器1 0 1，採取將其本體外殼埋設在門 禾口 T部 '對其安裝板進行固定的方式進行安裝，在 #與彈簧式關門器相對的天花板側和地板側中的接 方向來 式結構 單，能 雙開型 另一種 門的關 器101 將端部 周圍被 的上部 範圍內 件 106 107上 處突設 止動部 銷 105b ，這樣 的上部 被安裝 頭配件 1237085 中’嵌合並固定該旋轉軸的突出端而被安裝和使用。爲此 ’這種彈簧式關門器，由於在旋轉軸周圍僅僅只安裝有一 根螺旋彈簧和止動部件，其結構簡單且能做成小型結構， 因而能被安裝成埋入門的內部，外觀不引人注目，能有效 地使用於雙開門的門鉸鏈裝置。 然而’上述關門器爲了能利用螺旋彈簧的勢能對門在閉 鎖方向上給予勢能，且爲了能實現門的自動關閉而在關閉 門時沒有制動部，結果門關閉時勢頭過猛，造成使用問題 。爲解決這樣的問題點，現在除了這樣的門關閉器外，有 必要使用緩衝器機構。但是，上述專利文獻2中記載的彈 簧式緩衝器機構中僅能使用單開式門，不適用於雙開門用 途。 另外上述的自閉式門鉸鏈由於不能被附加有在門的開啓 動作作途中將門釋放和保持的機能，例如必須在門和地板 之間插入楔形止動器’或採用掛鈎等適宜手段將門止動在 地板一側等措施，因此無論哪種情況均需要人彎腰等工夫 。爲此，爲改進上述的問題’提出了專利文獻3和專利文 獻4中公開的自由停止機構等。但是’這些文獻中的門關 閉器並不對應於雙開式關門器。 【專利文獻3】特開平1 〇 -2 2 〇 1 2 0號公報 【專利文獻4】特開平9-158605號公報 (三）發明內容 因此，本發明的目的是1 ’通過提丨共一種在已有公知的弓單 簧式關門器內組合了 '油S _觀1 @ _白勺^胃β _ Μ _ $角军& -8- 1237085 上述已有的關門器所具有的問題點。 本發明的另一個目的是，在組合有上述油壓制動結構的 雙開式關門器中，通過提供一種採取比較簡單的結構能在 門從〇點位置開始到左右9 0度以上的打開位置，能夠使 門的開閉動作在途中暫時停止的自由停止結構的雙開式關 門器，來解決上述已有的關門器所具有的問題點。 本發明通過在彈簧式關門器內組合有根據門在一側的開 啓動作和另一側的開啓動作來同軸地移動油室內的活塞， 而在門返回時利用油壓來限制活塞的移動那樣的制動機構 ，來實現具有同軸雙開功能的、能被安裝在門內的、外觀 漂亮的雙開式關門器。另外，本發明由於組合有自由停止 機構，因此能發揮從門開啓角度超過左右9 0度的位置起 實現連續停止的功能。 爲實現上述目的，本發明採取的技術解決手段爲： 一種雙開式關門器，由固定在門框側中的門框側固定部 件，以及能旋轉自由地安裝在該門框側固定部件中的門側 固定部件構成，其特徵爲：通過被安裝在上述門框側固定 部件中輸出軸，當門向一側開啓時，與門的開啓動作一起 向開啓方向旋轉的外輪，以及當門向另一側開啓時與門的 開啓動作一起向開啓方向旋轉的內輪，各自能自由旋轉地 安裝在上述門框側固定部件內，上述外輪中安裝有筒體， 上述內輪中安裝有被插入上述筒體的緩衝器軸，上述緩衝 器軸和上述同體之間配置有能通過兩者的相對旋轉積蓄勢 能的彈性體，上述緩衝器軸和上述筒體一起形成油室，上 -9- 1237085 述油室中在緩衝器軸的軸方向上將活塞螺栓以滑動自由且 非旋轉狀態的形式安裝在上述緩衝器軸中，另外上述活塞 螺栓的外周和上述筒體側通過螺栓結合構成，根據門打開 的方向使緩衝器軸或筒體旋轉，使上述活塞螺栓能在油室 中移動。 又’本發明所述的雙開式關門器，其特徵爲：上述筒體 側與活塞螺栓的螺栓結合是由筒體側設置的圓柱內表面上 形成的螺栓和活塞螺栓外圍上形成的螺栓通過螺旋相結合 的。 又’本發明所述的雙開式關門器，其特徵爲：上述活塞 螺栓被做成圓筒狀，上述活塞螺栓的外周與上述圓柱內表 面螺旋結合，上述緩衝器軸以非旋轉且具有油的流路的形 式結合在上述活塞螺栓的上部，且在上述活塞螺栓的下部 設置有能根據門的開啓動作使活塞螺栓在油室內迅速移動 的止回閥。 又，本發明所述的雙開式關門器，其特徵爲：上述緩衝 器軸以及活塞螺栓中，流路調整用的調速棒貫通於活塞螺 栓的軸方向上，調速棒和活塞螺栓之間形成有油通過的流 路。 又，本發明所述的雙開式關門器，其特徵爲：上述調速 棒貫通活塞螺栓的部分被形成爲錐形，通過將調速棒在軸 方向上移動能調整它與活塞螺栓之間的流路面積。 又，本發明所述的雙開式關門器，其特徵爲：上述調速 棒被螺旋連接地安裝在門框側固定部件中，通過調速棒的 -10- 1237085 旋轉能使調速棒在軸方向上移動並調整它與活塞螺栓之間 的流路面積。 又，本發明所述的雙開式關門器，其特徵爲：上述調速 棒的旋轉是通過調速齒輪來使之能夠旋轉。 又，本發明所述的雙開式關門器，其特徵爲：上述彈性 體是將緩衝器軸貫通配置在由上述筒體和緩衝器軸所形成 的間隙之間的螺旋彈簧。 又，本發明所述的雙開式關門器，其特徵爲：設置有隨 著門在一側的開閉動作，使上述門框側固定部件和上述外 輪之間，以及上述門側固定部件和上述內輪成爲一體化， 且隨著門在另外側的開閉動作，使上述門框側固定部件和 上述內輪之間，以及上述門側固定部件和上述外輪形成一 體化的止動裝置。 又，本發明所述的雙開式關門器，其特徵爲：上述止動 裝置能使在外輪和內輪中各自能自由旋轉地設置的旋轉體 ，通過對各自形成在上述門框側固定部件一側、上述門側 固定部件一側的結合部的停止對象作切換，實現內轉動作 和外轉動作向一側以及另一側的開閉。 又，本發明所述的雙開式關門器，其特徵爲：上述止動 裝置是由在外輪和內輪中各自能自由旋轉地設置的旋轉體 ’和上述門框側固定部件的外周面上形成的上述旋轉體形 成的多個結合部，以及和上述門側固定部件的內周面上形 成的上述旋轉體形成的多個結合部所形成。 又，本發明所述的雙開式關門器，其特徵爲：上述門框 1237085 側固定部件中安裝的輸出軸，和上述外輪以及上述內輪之 間設置有能使門的自閉動作在任何一個位置上釋放的自由 停止機構。 又，本發明所述的雙開式關門器，其特徵爲：上述自由 停止機構配備有安裝在門框側固定部件上的輸出軸和上述 外輪、內輪之間所配置的旋轉部件保持器，自由旋轉地保 持在上述旋轉部件保持器中，且固定在門框側固定部件中 的輸出軸下部的外周面上所形成的結合部以及結合在門側 固定部件內周面上形成的結合部上的旋轉部件，另外還設 置有伴隨著門在一側的開閉動作，使上述旋轉部件保持器 和外輪之間，以及上述門框側固定部件和上述內輪形成一 體化，且隨著門在另一側的開閉動作，在旋轉部件保持器 和上述內輪之間，以及上述門側固定部件和上述外輪形成 一體化的止動裝置。 又，本發明所述的雙開式關門器，其特徵爲：上述門側 固定部件的內周面上形成的結合部形成爲在上述門的開閉 角度的位置上具有基本等於或稍大於上述旋轉部件的直徑 的寬度。 又，本發明所述的雙開式關門器，其特徵爲：上述止動 裝置通過對各自在外輪和內輪中自由旋轉設置的旋轉體向 各自在上述旋轉部件保持器一側和上述門側固定部件一側 形成的結合部的止動對象進行切換，能使內輪動作和外輪 動作向一側以及另一側開閉。 以下，根據附圖來對本發明的實施例做詳細說明。 1237085 (四）實施方式 有關本實施形式的雙開式關門器CL如第1圖所示被安 裝在門D的單側上方而使用。此時門D所對應的下部被 可旋轉地用另一體上的門鉸鏈Η所支持。 雙開式關門器C L如第2圖所示，在形成於安裝在門D 的門框側中的已有技術的鉸鏈的軸5 0中，不能旋轉地嵌 合有門框側固定部件1。具體來說，在該門框側固定部 件1的中央，整體地固定有輸出軸le，在該輸出軸le的 中心如第3圖所示那樣被形成有插入上述軸5 0的栓槽孔 1 a，該栓槽孔1 a內嵌合有形成在上述鉸鏈的軸5 0的前 端上的栓槽軸5 0a，它們兩者被不能旋轉地結合在一起。 如第2圖所示，固定在門框側固定部件1中的輸出軸1 e 上被形成有大直徑部1 A和小直徑部1 B，該輸出軸1 e的 中心形成有後面將要敘述的與調速棒2螺紋連接的孔1 b ，該孔1 b中安裝有自由旋轉的調速齒輪 3 a，它的一端 被不能旋轉但能上下自由運動的嵌合在上述調速棒2的中 心孔中，同時，組合與上述調速齒輪 3 a嚙合的調速齒輪 3 b的孔1 c與上述孔1 b垂直相交地形成在上述門框側固 定部件1中。 另外，輸出軸1 e的小直徑部1 B的外圓周上，經軸承4 、4和蓋部件5安裝有圓筒形的門側固定部件7，通過這 種結構，門側固定部件7能夠安裝在門框側固定部件1中 並形成爲相對於該門框側固定部件1能夠旋轉的結構。此 外，圖中的6爲阻止蓋部件5的C型止動輪，8爲結合門 1237085 和門側固定部件7的螺紋孔，該螺紋孔8以適當的多個數 目形成在門側固定部件7上。 如第6圖（c)所示，在形成爲圓筒形的門側固定部件7 的空隙S中，嵌合配置有立設在上部一側的具有壁部9a 的圓筒形外輪 9，以及立設在上部一側的具有壁部1 〇a 的圓筒形內輪1 0，另外在外輪9的內圓周上還自由旋轉 地嵌合有形成在上述內輪10的下部的軸部10c(參照第6 圖（b))。外輪9和內輪1〇的上部一側的各自的壁部9a、10a ，其外徑形成爲具有相同的直徑且被嵌合在上述空隙S中 ，並且在外輪9和內輪10的上述壁部9a、10a上形成有 保持旋轉體1 1(本例中爲鋼球，圓形斷面的滾柱也可以）的 切口部9 b和1 0 b。 另外，如第6圖（a)所示，整個固定在門框側固定部件1 上的輸出軸1 e的大直徑部1 A的外圓周上，被形成有多個 嵌合有上述旋轉體1 1的斷面爲圓弧形的凹部1 d，並且 在門側固定部件7的內圓周上，如圖示那樣被形成有多個 嵌合有上述旋轉體11的斷面爲圓弧形的凹部7a(本例中 爲2個部位），由這些凹部1 d、7a以及旋轉體1 1來形成 門框側固定部件1的輸出軸1 e以及門側固定部件7和內 輪1 〇的止動裝置、以及門框側固定部件1的輸出軸1 e以 及門框側固定部件7和內輪1 〇的止動裝置（根據開門的方 向來切換止動對象）。另外，門框側固定部件1的輸出軸 1 e上被形成有連接壁部1 〇 a和9 a而阻止內輪1 〇和外輪9 旋轉的突起1 3，此外，門側固定部件7的內圓周上被形 1237085 成有連接壁部1 〇 a和9 a而使內輪1 〇和外輪9旋轉的突起 14。這樣，在門處於關閉狀態時，如第6(a)圖所示那樣 ’門側固定部件7的突起1 4和門框側固定部件1的輸出 軸1 e的突起1 3被後面將要敘述的螺旋彈簧的勢能挾持在 外輪9和內輪1 0之間且將兩突起1 3和1 4的位置對齊保 持在中立狀態。 如第2圖所示，筒體15的上端由上動銷16被固定在 外輪9的下部’並被構成能與外輪9成一體地進行旋轉。 另外，緩衝器軸1 7的上端被不能旋轉地安裝在內輪1 〇的 下部，緩衝器軸1 7與內輪1 0 —起被構成能一體地進行旋 轉。另外在本例中，由於內輪1 0和緩衝器軸1 7是被鋸 齒連接方式固定的，因此緩衝器軸1 7和內輪1 0能夠被 形成爲一*體。 在筒體1 5的內圓周和緩衝器軸1 7的外圓周之間，配置 有能將緩衝器軸1 7卷回的用作彈性體的螺旋彈簧1 8， 螺旋彈簧18的上端用適當的固定裝置被固定在上述筒體 1 5 —側，而螺旋彈簧1 8的下端用適當的固定裝置被固定 在緩衝器軸1 7 —側。另外在本例中，嵌合在緩衝器軸1 7 中的彈簧座1 9中被停止有螺旋彈簧1 8的上端，在使該彈 簧座1 9旋轉從而在螺旋彈簧1 8中積蓄扭轉力的狀態時 ，由上述彈簧座1 9的外圓周上形成的凹部1 9a的筒體1 5 的窗口 1 5 a而來的固定銷2 0固定，據此能將螺旋彈簧1 8 的上端固定在筒體1 5的一側，同時將螺旋彈簧1 8的下端 結合在緩衝器軸1 7的切口部1 7 a中，通過該構成方式能 1237085 在筒體1 5和緩衝器軸1 7相對旋轉時，在螺旋彈簧1 8中 積蓄一定的扭轉力。 筒體15的下部內，配置有圓筒21，該圓筒21與圓筒 底蓋22通過熔接等方式被形成爲一個整體，此外，圓筒 底蓋22用止動銷23等固定在筒體15的下部。圓筒基座 2 4用密封件2 5等液密地安裝在上述圓筒2 1的前端內部 ’該圓筒基座2 4中貫通地配置有上述緩衝器軸1 7。緩衝 器軸1 7和圓筒基座2 4之間配置有基座用套筒2 4 a和密封 件2 6。這樣上述圓筒基座2 4經由止動銷3 5將圓筒2 1和 冠裝在圓筒21的上部緩衝器軸承34 —體地固定。 上述圓筒21的內部形成有由圓筒基座24和圓筒底蓋22 形成的油室2 7，該油室2 7的內部被充滿油。油室2 7中 ，配置有將油室2 7劃分爲上部室2 8和下部室2 9的活塞 螺栓30，該活塞螺栓30被做成圓筒形，上述活塞螺栓30 的外圓周與上述圓筒2 1的內表面通過螺旋相結合，上述 緩衝器軸1 7以非旋轉、且具有油的流路的方式通過栓槽 結合在上述活塞螺栓3 0的上部，此外，上述活塞螺栓3 〇 的下部被固定有閥座30A、該閥座30A中設置有如圖所示 那樣根據門的開啓動作在當活塞螺栓3 0向上方移動時能 使油迅速地從上部室2 8移動到下部室2 9中的止回閥3 1 ( 本例中爲球閥）。此外，活塞螺栓3 0和緩衝器軸1 7之間 ，如第5圖所示那樣，形成有連通上部室2 8和下部室2 9 的流路（油逃逸溝）3_2。 上述活塞螺栓3 0和緩衝器軸1 7通過鋸齒被結合在一 1237085 起，該活塞螺栓3 0沿鋸齒上下移動。通過這種構成，例 如，緩衝器軸1 7在非旋轉狀態時若筒體1 5旋轉的話，則 與筒體1 5組成爲一體的圓筒2 1便旋轉，並且與圓筒2 i 的內表面螺旋結合的活塞螺栓3 〇通過圓筒2 1的旋轉以非 旋轉的狀態向上方移動。另外，如果與筒體1 5成一體的 圓筒2 1處於非旋轉狀態而緩衝器軸1 7旋轉的話，與緩 衝器軸1 7通過鋸齒結合的活塞螺栓3 0便與緩衝器軸1 7 成一體地旋轉，由此，螺旋連接在圓筒2 1中的活塞螺栓 3 〇便使經鋸齒結合的緩衝器軸1 7向上方移動。 此外，活塞螺栓30的上述閥座3〇A的中央部中貫通有 調速棒2，該調速棒2貫通活塞螺栓3 0的閥座3 Ο A的部 分被形成爲錐形（本例中形成爲從下方一側向上方一側依 次減少直徑的錐形形狀）。從而將設置在上述門框側固定 部件1的一側的調速齒輪3 b轉動，且經過設置在輸出軸 1 e內部的調速齒輪3 a將調速棒2轉動，這樣能使門框側 固定部件1的輸出軸1 e上經螺旋結合的調速棒2相對於 活塞螺栓3 0上下移動，由此，活塞螺栓3 0上形成的貫通 孔和調速棒2之間的間隙可通過調速棒2的錐形部加以調 節，也可以調節該間隙部分的流路面積。此外，調速棒2 和緩衝器軸17之間設置有密封件33，能防止油室27的 油流入孔1 b內。另外，調速棒2的上下移動並不限於螺 旋方式，也可以採用手動提升調整等其他手段。此外，3 6 、3 7爲用來對圓筒2 1的外圓周和活塞螺栓3 0的外圓周 進行密封的密封件和保護件。3 8爲緩衝器軸1 7的軸止動 1237085 輪。 以下說明上述結構的雙開式關門器的動作。 在門關閉狀態時’內輪1 0、外輪9位於第7 (b)圖所示 的〇點靜止位置上。 若從該狀態向右方開啓門D、與門D固定的門側固定部 件7則向右方旋轉（參照第7 (c)圖）。通過該門側固定部件 7的右方向旋轉，形成在門側固定部件7上的突起1 4 一 邊壓向內輪1 〇的壁部1 0 a，一邊將內輪向右旋轉。此時 ’爲使內輪1 〇的切口部1 Ob上保持的旋轉體1 1 a —邊止 留在門側固定部件7上形成的凹部7a中，一邊將門框側 固定部件1的一側的輸出軸1 e的外圓周移動，門框側固 定部件7和內輪10形成一體地向右方移動。另一方面， 在外輪9 一側，在門框側固定部件1的輸出軸1 e的突起 1 3上接觸外輪9的壁部9a從而阻止旋轉，同時旋轉體1 1 b 向形成在門框側固定部件1的輸出軸1 e的大直徑部1 A上 的凹部1 d移動並嵌合在裏面，因此門側固定部件7能夠 以其在旋轉體1 1 b上的旋轉不被阻止的方式進行移動。此 時，與內輪1 〇 —體固定的緩衝器軸1 7也沿著第8圖內開 啓動作所示那樣向右方旋舊並將螺旋彈簧1 8扭緊，同時 將勢能積蓄在螺旋彈簧1 8中。另外，因此同時，由緩衝 器軸1 7的旋轉，活塞螺栓3 0也向右方旋轉。由於該活 塞螺栓3 0的旋轉，從而使活塞螺栓3 0的外圓周與圓筒2 1 的內表面螺旋結合，因此僅僅活塞螺栓3 0由螺旋作用而 向上方移動。 1237085 由於活塞螺栓3 0向上方移動，止回閥3 1打開，將上部 室2 8的油經止回閥3 1向下部室2 9移動，從而在門d開 啓動作時不發揮制動作用。但是，由於門D —邊將勢能積 蓄在螺旋彈簧1 8中，一邊被打開，因此若從門〇打開狀 態釋放，由於蓄有勢能的螺旋彈簧1 8的作用使門d向關 閉方向旋轉。此時，如第8圖的開閉動作所示那樣，緩衝 器軸1 7朝著與上述相反的方向旋轉，在活塞螺栓3 〇向下 方移動的同時止回閥關閉，由此從下部室29出來的油只 能流過調速棒和活塞螺栓3 0的閥座3 Ο Α的貫通孔之間的 間隙。此時，門側固定部件7由於是和內輪1 〇成爲一體 的，因而不能被門D的慣性所分離。因此，此時，對流過 間隙的油的阻力便能發揮對門D在關閉方向上的制動作用 ，門D便能慢慢地關閉。另外，該關閉速度將調節調速棒 2速度的調速齒輪3 a、3 b進行旋轉，對上下移動間隙調 節，因此能夠調整門D的關閉速度。 此外，門D從關閉狀態時開始向左方開啓時，門D和 固定在門D上的門側固定部件7 —起也向左方向旋轉（參 照第7圖（a))。由於該門側固定部件7的向左方的旋轉， 形成在門側固定部件7 —側的突起1 4 一邊壓向外輪9的 壁部9a，一邊將外輪9朝左方旋轉。此時，外輪9的切 口部9b上保持的旋轉體1 1 b被止留在門側固定部件7上 所形成的凹部7 a中，同時移動門框側固定部件1的輸出 軸1 e的外圓周，爲此門側固定部件7同外輪9形成爲一 體並向左方移動。另一方面，在內輪1 〇 —側，在門框側 1237085 固定部件1的輸出軸1 e的突起1 3上接觸內輪1 0的壁部 1 〇 a，從而阻止旋轉，同時旋轉體1 1 a移動到門框側固定 部件1的輸出軸1 e的大直徑部1 A上形成的凹部1 d上並 嵌合在那裏，從而能使門側固定部件7在旋轉體1 1 a中的 旋轉不能被阻止地進行移動。此時，與外輪9固定爲一體 的筒體1 5也如第9圖的開啓動作所示那樣向左方移動， 從而將螺旋彈簧1 8擰緊，同時將勢能積蓄在螺旋彈簧1 8 中。與此同時，與筒體15爲一體的圓筒21也向左旋轉， 因而圓筒2 1的內周面上螺旋結合的活塞螺栓3 0由於處在 非旋轉的狀態，因此僅使活塞螺栓3 0在螺旋的作用下向 上方移動。 由於活塞螺栓3 0向上方的移動，止回閥3 1打開，上部 室2 8中的油經過止回閥3 1向下部室2 9移動，因此在門 D的開啓動作時不發揮制動作用。但是，由於門D —邊將 勢能積蓄在螺旋彈簧1 8中，一邊打開，若此時從門d打 開狀態釋放的話，由於積蓄有勢能的螺旋彈簧i 8的作用 ，門D便向關閉方向旋轉。此時，如第9圖的開閉動作所 示，外輪9朝與前述方向相反的方向旋轉，筒體1 5也朝 相反方向旋轉且活塞螺栓3 0向下方移動的同時止回閥3 i 關閉，因而從下部室2 9出來的油僅能通過調速棒2和活 塞螺栓3 0的閥座3 Ο A的貫通孔之間的間隙進行移動。此 時，門側固定部件7由於與外輪9成爲一體，因而不能被 門的慣性所分離。從而，此時流過間隙的油的阻力能發揮 對門D在關閉方向上的制動作用，從而使門d慢慢的關 -20- 1237085 閉。此外，該關閉速度由於能對調節調速棒2的速度的調 速齒輪3 a、3 b旋轉，且對上下運動間隙調整，因而門d 的關閉速度也能被調整。 如上所示，上述實施例，無論是關於一側還是另一側的 動作，當門開啓時’都在彈性體內積蓄勢能，在門關閉時 ’利用弾性體內積畜的勢能被來關閉門，而且，利用流向 上部室和下部室的油的移動阻力將制動作用施加於門上， 從而能使門慢慢關閉。另外，在上述詳述的實施例中，筒 體和緩衝器軸之間配置的螺旋彈簧，只要是能達到同樣功 能的彈性體的話，就能採用其他的不同形態。 以下參照附圖來說明在上述雙開式關門器中組合有自由 停止結構的雙開式關門器。本實施例的特徵爲，上述雙開 式關門器的上部中組合有自由停止結構。因此，由於關門 器的基本結構和上述實施例相同，此處主要對自由停止結 構加以說明。另外，對於和上述實施例相同的部件使用相 同的符號。第1 〇圖爲組合有該自由停止結構的雙開式關 門器的上部剖視圖（對應於上述實施例中的第 2圖中的上 部剖面的圖面）、第11圖爲除去門側固定部件狀態的自由 停止結構的各部件（輸出軸、回轉部件保持器（以下稱滾柱 保持器）、內輪、外輪）的分解說明圖、第1 2圖爲滾柱保 持器的剖視圖、側視圖、頂視圖和底視圖、第1 3圖爲第 1 1圖中的c - C剖面上門側固定部件安裝的剖視圖、第1 4 圖爲第1 1圖中D-D剖面上門側固定部件安裝的剖視圖。 第1 〇圖中，在門框側固定部件1的中央’一體地固定 1237085 有輸出軸60 ’在該輸出軸60的中心形成有插入軸50的 检槽孔60a ’該栓槽孔6〇a內嵌合有形成上述軸50的前端 上的检槽軸5 〇 a，兩者被不能旋轉地結合在一起。另外 ’圖中6 7、6 8分別爲設置在旋轉部中的襯套，它們由例 如樹脂類和燒結含油類的材料形成。但也可以使用具有相 同功能的其他材料。 在門框側固定部件〗固定的輸出軸6 〇的下部的外圓周 面_h ’如第1 1圖所示那樣形成有結合旋轉部件（以下稱滾 柱）61的滾柱溝（結合部）62，該滾柱溝62形成在相隔180 度的兩處（參照後述第13圖）。 經襯套6 7可旋轉地嵌合在該輸出軸6 0中的滾柱保持器 6 3採取如第1 1圖和第i 2圖所示的由大直徑部6 3 a和小 直徑部6 3 b形成的斷面爲倒帽形的結構。· 滾柱保持器6 3上形成有中心部被插入調速棒2的貫通 孔64，另外如第1 1圖和第1 2圖所示那樣，在大直徑部6 3 a 的上半部分中保持上述滾柱6 1的、側視爲U形的貫通溝 6 3 c形成在兩相隔1 8 0度的位置上，另外在大直徑部6 3 a 的下半部分中形成有嵌合並被保持在內輪1 0和外輪9中 所形成的切口部l〇b和9b中的旋轉體1 1的圓弧狀凹部63d 。該凹部6 3 d對應於形成在上述實施例的輸出軸1 e中的 凹部1 d。 在輸出軸6 0和滾柱保持器6 3以及內輪1 0和外輪9的 外圓周上，如第1 〇圖所示那樣，配置有門側固定部件7 。另外，如第1 1圖和第13圖（第1 1圖中C-C剖視圖）所 •22- 1237085 示那樣，上述門側固定部件7的內圓周面中相對於0點靜 止位置，上述輸出軸的下部外圓周面上形成的滾柱溝62被 相隔1 8 0度地形成在兩個位置上，還形成有作爲具有相對 於滾柱6 1約兩倍的直徑的結合部的溝6 5。該溝6 5的大 小根據門開閉角度的大小也可以爲大約滾柱6 1的直徑。 另外，上述溝65並非一定要在兩處形成，61若爲一個， 則也可在一處形成，另外溝6 5的形狀也可以採取在嵌合 滾柱6 1的上述實施例中說明的圓弧形凹部。 另外，在對應於內輪1 〇和外輪9的滚柱保持器6 3形成 有與上述實施例的輸出軸1 e的大直徑部1 Α上形成的圓弧 形凹部1 d相當的圓弧形凸部6 3 d，同時還形成有與形成 在輸出軸1 e上的突起1 3相對應的突起6 6。這樣，滾柱 保持器6 3、內輪1 0、外輪9、以及門側固定部件7如第 1 4圖所示那樣形成與上述實施例相同的組合結構。另外 ，滾柱保持器63、內輪1 0、外輪9、門側固定部件7的 動作也與上述的實施例相同，在此省略對它們的詳細說明 〇 現在參考第1 5圖來說明上述自由停止結構的作用。 在第15圖（b)中，門處於關閉狀態時，內輪1〇、外輪9 、滾柱保持器6 3位於0點靜止位置（對應於上述實施例的 第7圖（b))，滾柱保持器63和輸出軸60以及門側固定部 件7同樣也位於0點靜止位置。 從該狀態起如第1 5圖（c)所示，門D向右方向開啓時， 與門D相固定的門側固定部件7向右方旋轉，由於該門側 -23- 1237085 固定部件7的右方向的旋轉，如上述實施例中所述的那樣 ，門D在螺旋彈簧1 8中積蓄勢能的同時被打開，因此若 從門打開的狀態釋放的話，在積蓄有勢能的螺旋彈簧18 的作用下門D向關門的方向旋轉。此時，由於制動作用， 門D便慢慢地關閉。 另外，在自由停止機構中，首先，在門D關閉的0點靜 止位置，保持在滾柱保持器6 3上的滾柱6 1結合在輸出 軸60上所形成的滾柱溝62中。由此，如用手推開門D的 話，在自由停止機構一側，與門D成一體旋轉的門側固定 部件7向相同方向轉動。此時，滾柱保持器63通過滾柱 61與輸出軸60形成一體，處於非旋轉狀態。這樣，內 輪1 〇或外輪9中所結合的螺旋彈簧1 8中與上述實施例一 樣地被積蓄彈性力。接下來將門D於途中放開的話，門D 便通過螺旋彈簧1 8的彈性力返回原處。 但是，若將門D打開90度（參照第15圖（〇)，此時，滾 柱保持器63中所保持的滾柱6 1從輸出軸60 —側所形成 的滾柱溝62向形成在門側固定部件7的內圓周面上的尺 寸大的溝65內移動，滾柱61向輸出軸60的外圓周面移 動’通過輸出軸6 0和滾柱保持器6 3的滾柱6 1的結合便 被解除’接著滾柱保持器6 3和門側固定部件7通過滾柱 6 1形成一體。其結果，在螺旋彈簧1 8中積蓄的彈性力被 維持的情況下，門；〇 一側固定部件7在滾柱6 1被收容在 溝65內的狀態下能夠在輸出軸60的外圓周上自由旋轉， 此外若停止門側固定部件7的旋轉的話，門D能在該位置 -24- 1237085 上維持停止狀態。這樣在本例中，即使超過9 0度進一步 打開門D的話，在此之後在所希望的位置上都能將門d 停止在任意的位置。另外，在關閉門D時，在9 0度以內 若門D返回時，在螺旋彈簧1 8的彈性力的作用下，門d 能自動地關閉。此時’上述實施例中說明的制動作用起作 用，從而能回避門D的急劇關閉的作用。另外，在反向一 側開門時，若門D打開90度，如第1 5圖（a)所示那樣也 能得到與第1 5圖（b )相同的同樣動作的自由停止狀態。 如此，在本實施例中，門側固定部件7的內圓周面上形 成的溝6 5以0點爲中心具有向左向右以相同長度（約爲 滾柱6 1的直徑）分開的寬度，因此門D從〇點靜止位置 開始左右9 0度開啓時的那一點開始便能得到自由停止的 狀態。 但是’在單側9 0度打開的狀態，爲能得到自由停止狀 態，如第1 6圖（b)那樣在門側固定部件7的內圓周面上 形成的溝7 1以〇點爲中心在偏開α度的位置上，滾柱6 1 嵌合在圓弧形凹部的場合，如第1 6圖（〇那樣，將門D向 右側開啓時，門D從9 0度開啓時的那一點開始便能得到 自由停止的狀態。但是，門D在相反一側開啓的場合， 如第1 6圖（a)所不那樣，若不開到（9 〇 + 2 α)度的話，就不能 得到自由停止的狀態。這樣，門側固定部件7的內圓周面 上所形成的溝7 1在以〇點爲中心偏開α度的位置上形成 的場合（例如上述已有技術，參照特開平1 0-220 1 02號公 報）’根據左右開啓的角度得到自由停止狀態的開度是不 -25 - 1237085 一樣的，便會產生與雙開式關門器等的場合不相配的情況 。然而，即使是雙開式關門器，在建築物的結構和雙開的 角度不一樣的場合，也能採用如第1 6圖所示那樣的自由 停止結構。 採用以上所示的上述實施例，可構成在雙開式關門器中 附加滾柱保持器和滾柱的自由停止結構，由於這種構成方 式簡易，因此適合於小型化。 另外，上述實施例僅僅爲示例性的，在不脫離本發明的 精神和主要特徵的情況下，本發明仍然可以實施爲其他不 同的形式，而不應對此加於限定性的解釋。 如以上詳細說明的那樣，本發明具有如下優異的效果， 由於彈簧式關門器內安裝有油壓制動結構，對裝置能夠小 型化的同時也簡化了其結構，其結果，能在門內容納雙開 式關門器，且使施工變得容易，另外也不受雨和淸掃時的 淸潔劑的影響。因爲能夠從左右任何一側打開，因而擴大 了使用範圍，另外，本發明由於安裝有自由停止結構，因 此門開啓的角度可從左右超過9 0度的位置開始連續地發 揮停止的功能，並且由於溝寬度形成得大，因此在左右任 何方向9 0度的位置上都能發揮自由停止的功能。 (五）圖式簡單說明 第1圖爲有關本實施例的雙開式關門器，安裝在門上的 狀態的正視圖和側視圖； 第2圖爲該雙開式關門器的剖視圖； 第3圖爲該雙開式關門器的頂視圖； -26- 1237085 第4圖爲第2圖所示的雙開式關門器的a-A剖視圖； 第5圖爲第2圖所示的雙開式關門器的b _ B剖視圖； 第6圖爲外輪和內輪的組裝圖，零件圖和剖視圖； 第6 (a)圖爲雙開式關門器之剖視圖； 第6 (b)圖爲雙開式關門器之左側部零件圖； 第6(c)圖爲雙開式關門器之上端部零件圖； 第6 ( d)圖爲雙開式關門器之右側部零件圖； 第7圖爲該雙開式關門器在開閉動作時的外輪和內輪的 φ 動作圖； 第7 (a)圖爲雙開式關門器向左開啓動作圖； 第7(b)圖爲雙開式關門器在〇點靜止位置旋轉方向切換 動作圖； 第7(c)圖爲雙開式關門器向右開啓動作圖； 第8圖爲該雙開式關門器的右開方向的油壓機構剖視圖； 第9圖爲該雙開式關門器的左開方向的油壓機構剖視圖； 第1 〇圖爲結合有自由停止結構的雙開式關門器的上部 ® 剖視圖； 第1 1圖爲除去門側固定部件狀態的自由停止結構的各 部件（輸出軸、滾柱保持器、內輪、外輪）的分解說明圖； 第1 2圖爲滾柱保持器的剖視圖、側視圖、頂視圖和底 視圖； 第1 3圖爲第1 1圖中的C - C剖面上裝配有門側固定部件 的剖視圖； -27- 1237085 第1 4圖爲第1 1圖中的D - D剖面上裝配有門側固定部件 的剖視圖， 第1 5圖爲自由停止結構的動作說明圖； 第1 5(a)圖爲向左開啓動作圖； 第1 5 (b)圖爲在0點靜止位置旋轉方向切換動作圖； 第15(c)圖爲向右開啓動作圖； 第1 6圖爲其他的自由停止結構的動作說明圖； 第16(a)圖爲向左開啓動作圖； 第1 6 (b )圖爲在Ο點靜止位置旋轉方向切換動作圖； 第16(c)圖爲向右開啓動作圖； 第1 7圖爲已有的彈簧式關門器的結構剖視圖。 主要部分之代表符號說明 1 門框側固定部件 1 A 大直徑部 1 B 小直徑部 la 栓槽 Id 凹部 1 e 輸出軸 2 調速棒 3 a 調速齒輪 3b 調速齒輪 4 軸承 5 蓋部件 7 門側固定部件 7a 凹部 -28- 1237085 8 螺紋孔 9 外輪 9 a 壁部 9b, 10b 切口部 10 內輪 10a 壁部 1 1 (1 1 a, lib) 旋轉體 13 突起 14 突起 15 筒體 16 止動銷 17 緩衝器軸 17a 切口 18 螺旋彈簧 19 彈簧座 20 固定銷 2 1 圓筒 22 圓筒底蓋 23 止動銷 24 圓筒基座 25 密封件 26 密封件 27 油室 28 上部室 29 下部室1237085 (1) Description of the invention: (1) The technical field to which the invention belongs The present invention relates to a double-opening door closer combined with a hydraulic brake structure in a spring-type door closer, and more particularly to a combination of a During each door opening operation in the pulling direction, the door closing operation is performed using the potential energy accumulated during the door opening operation, and the accumulated potential energy is used to limit the sharply closed hydraulic brake structure during the door closing operation. A simple, small double-opening door closer that can hold the door closer body in the door. The present invention also relates to a double-opening door closer in which the above-mentioned braking structure is combined, in which an opening position capable of starting from the 0 o'clock position to 90 degrees left and right can be combined in the door. A double-opening door closer with a free-stop mechanism that temporarily stops the door opening and closing operation on the way. (2) Prior art As a door hinge device for supporting double-open doors provided at the entrances of various stores, Door hinge devices that support a door by, for example, a pivot in a top pivot device embedded in a ceiling and a pivot in a bottom hinge embedded in a floor are generally used. Since the existing double-opening doors that open in two directions are mainly embedded in the floor, Therefore, the necessity of construction and frequent inconveniences such as rain and cleaning agents required during cleaning. In addition, The existing double door hinge device also uses a spring-type door closer, But they are all devices that rely on spring force to close the door. Therefore, there is a danger of sudden opening and closing of the door. Furthermore, In the current center hanging door closer -6- 1237085, Because it is determined by the direction of the spring tightening and the cutting thread of the piston bolt that the door is opened left and right @ 力 式 的 缘 古文 ’doctor •, it cannot be made ^ stomach, So it brings problems. From this point of view ’recently, it ’s also been proposed that the structure is relatively simple and small, A spring-loaded door closer that has a good appearance with few exposed parts during installation (Patent Document 1). In addition, A device such as a shock absorber hinge that uses oil pressure to adjust the closing speed in order to brake and absorb the closing force of the door has also been proposed (Patent Document 2). [Patent Document 1] Patent No. 3 0 2 3 649 [Patent Document 2] Special Fair 7- 1 8 2 9 1 For example, Patent Literature 1 describes a spring-loaded door, As shown in Figure 17, Inside the cylindrical body housing 102, The protruding rotation shaft 104 is configured to be rotatable, The helical spring 108 is embedded outside the rotating shaft 104, At the same time, the rotating shaft 104 and the lower stopper 1 06, 1 07, It can be turned at a predetermined angle. The upper end of the coil spring 108 is fixed to the upper stopper. The lower end of the coil spring 108 is fixed to the lower moving member. The stopper pin 103b on the inner side of the mounting plate 103 covering the upper portion of the main body housing 102 is connected to the upper stopper member 106b, The stopper protruding from the bottom plate 105 of the main body housing 102 is connected to the stopper portion 107b of the lower stopper member 107. And the spring-loaded door closer 1 0 1, It is installed by burying its body shell in the door and the T part of the gate. In the direction of the ceiling side and floor side opposite to the spring-loaded door closer, the structure is single, A double-opening type shutter 101 can protrude a stopper pin 105b on the upper part of the upper part of the surrounding area 106 107, Such an upper portion is fitted and fixed to the protruding end of the rotating shaft in the mounting head fitting 1237085 and is installed and used. To this end, ‘this spring-loaded door closer, Since only one coil spring and stopper are installed around the rotating shaft, Its structure is simple and can be made into a small structure, So it can be installed inside the entrance door, The appearance is unobtrusive, Can be effectively used for door hinges for double doors. However, in order to use the potential energy of the coil spring to give the door potential energy in the closing direction, And in order to realize the automatic closing of the door, there is no braking part when the door is closed, As a result, the door was too aggressive when the door was closed, Causes usage problems. To solve such problems, In addition to such door closers, It is necessary to use a buffer mechanism. but, Only the single-opening door can be used in the spring-type shock absorber mechanism described in the above Patent Document 2. Not suitable for double doors. In addition, since the self-closing door hinge described above cannot be added with the function of releasing and holding the door during the opening operation of the door, For example, wedge-shaped stoppers ’must be inserted between the door and the floor, or the door must be stopped on the floor by a suitable means such as a hook. So in either case, it takes time for people to bend over and wait. to this end, In order to improve the above-mentioned problems, a free stop mechanism and the like disclosed in Patent Document 3 and Patent Document 4 have been proposed. But 'the door closers in these documents do not correspond to double-opening door closers. [Patent Document 3] Japanese Unexamined Patent Publication No. 1 2-2 0 1 2 0 [Patent Document 4] Japanese Unexamined Patent Publication No. 9-158605 (3) Summary of Invention Therefore, The purpose of the present invention is to combine a combination of '油 S _ 观 1 @ _ 白 碗 ^ stomach β _ Μ _ $ angle army & -8- 1237085 The problems with the existing door closers mentioned above. Another object of the invention is, In the double-opening door closer combined with the above hydraulic brake structure, By providing a relatively simple structure, the door can be opened from 0 o'clock to more than 90 degrees left and right. A double-opening door closer with a free-stop structure capable of temporarily stopping the opening and closing operation of a door on the way, To solve the problems of the existing door closers. According to the present invention, a piston in an oil chamber is moved coaxially in a spring-type door closer according to the opening operation of the door on one side and the opening operation of the other side. And when the door returns, the brake mechanism, such as the use of oil pressure to limit the movement of the piston, To achieve coaxial dual opening, Can be installed in the door, Appearance Beautiful double-opening door closer. In addition, Since the present invention is combined with a free stop mechanism, Therefore, it can perform the function of continuous stop from the position where the door opening angle exceeds 90 degrees left and right. To achieve this, The technical solutions adopted by the present invention are: A double-opening door closer, By the door frame side fixing member fixed in the door frame side, And a door-side fixing member which can be rotatably mounted in the door-frame-side fixing member, Its characteristics are: By mounting the output shaft in the door frame-side fixing member, When the door opens to one side, The outer wheel that rotates in the opening direction together with the door opening action, And the inner wheel that rotates in the opening direction together with the opening action of the door when the door opens to the other side, Each is rotatably mounted in the door frame-side fixing member, A cylinder is installed in the outer wheel, A bumper shaft inserted into the cylinder is mounted on the inner wheel, An elastic body capable of accumulating potential energy through the relative rotation of the shock absorber shaft and the same body is arranged, The buffer shaft and the cylinder form an oil chamber together, Above -9-1237085 In the oil chamber, a piston bolt is mounted in the above-mentioned buffer shaft in a sliding free and non-rotating state in the axial direction of the buffer shaft. In addition, the outer periphery of the piston bolt and the cylinder side are configured by bolting, Rotate the buffer shaft or cylinder according to the direction in which the door opens, The piston bolt can be moved in the oil chamber. Also ’the double-opening door closer according to the present invention, Its characteristics are: The bolt coupling between the cylinder side and the piston bolt is made by screwing the bolt formed on the inner surface of the cylinder provided on the cylinder side and the bolt formed on the periphery of the piston bolt. Also ’the double-opening door closer according to the present invention, Its characteristics are: The piston bolt is made into a cylindrical shape, The outer periphery of the piston bolt is spirally combined with the inner surface of the cylinder. The buffer shaft is coupled to the upper part of the piston bolt in a non-rotating and oil flow path form. A check valve is provided at the lower part of the piston bolt to allow the piston bolt to move rapidly within the oil chamber in accordance with the opening operation of the door. also, The double-opening door closer according to the present invention, Its characteristics are: In the above buffer shaft and piston bolt, The speed control rod for flow path adjustment penetrates the axial direction of the piston bolt, A flow path is formed between the governor rod and the piston bolt. also, The double-opening door closer according to the present invention, Its characteristics are: The part of the speed control rod penetrating the piston bolt is tapered, The area of the flow path between the governor and the piston bolt can be adjusted by moving the governor in the axial direction. also, The double-opening door closer according to the present invention, Its characteristics are: The speed control rod is screw-connected to the door frame side fixing member, The -10- 1237085 rotation of the speed control rod can move the speed control rod in the axial direction and adjust the flow path area between it and the piston bolt. also, The double-opening door closer according to the present invention, Its characteristics are: The speed control rod is rotated by the speed control gear. also, The double-opening door closer according to the present invention, Its characteristics are: The elastic body is a coil spring that penetrates and arranges a buffer shaft between a gap formed by the cylindrical body and the buffer shaft. also, The double-opening door closer according to the present invention, Its characteristics are: Provided with the door opening and closing action on one side, Between the door frame side fixing member and the outer wheel, And the door-side fixing member and the inner wheel are integrated, And as the door opens and closes on the other side, Between the door frame side fixing member and the inner wheel, And the door-side fixing member and the outer wheel form an integrated stopper. also, The double-opening door closer according to the present invention, Its characteristics are: The above-mentioned stopper device can enable a rotating body provided in each of the outer wheel and the inner wheel to be freely rotatable, By forming the respective fixing members on the door frame side, The stop target of the joint part on the door side fixing member side is switched, Opening and closing of inward and outward movements to one side and the other. also, The double-opening door closer according to the present invention, Its characteristics are: The stopper is a plurality of coupling portions formed by a rotating body ′ provided on each of the outer wheel and the inner wheel so as to be rotatable, and the rotating body formed on the outer peripheral surface of the door frame-side fixing member. And a plurality of coupling portions formed with the rotating body formed on the inner peripheral surface of the door-side fixing member. also, The double-opening door closer according to the present invention, Its characteristics are: The output shaft installed in the above door frame 1237085 side fixing member, A free stop mechanism is provided between the outer wheel and the inner wheel to release the self-closing action of the door at any position. also, The double-opening door closer according to the present invention, Its characteristics are: The above-mentioned free stop mechanism is provided with an output shaft mounted on a door frame-side fixing member and the above-mentioned outer wheel, Holders of rotating parts placed between the inner wheels, Freely held in the rotating member holder, And a joint formed on the outer peripheral surface of the lower portion of the output shaft in the door frame-side fixing member and a rotating member coupled to the joint formed on the inner peripheral surface of the door-side fixing member, In addition, it is also provided with the opening and closing action accompanying the door on one side, Between the rotating member holder and the outer wheel, And the door frame side fixing member and the inner wheel are integrated, And as the door opens and closes on the other side, Between the rotating part holder and the above-mentioned inner wheel, And the door-side fixing member and the outer wheel form an integrated stopper. also, The double-opening door closer according to the present invention, Its characteristics are: The coupling portion formed on the inner peripheral surface of the door-side fixing member is formed to have a width substantially equal to or slightly larger than the diameter of the rotating member at a position where the door is opened and closed. also, The double-opening door closer according to the present invention, Its characteristics are: The stopper device switches the stopper object of each of the joints formed on the rotating member holder side and the door-side fixing member side by rotating the rotating bodies provided on the outer wheel and the inner wheel freely. The inner and outer wheels can be opened and closed to one side and the other. the following, Embodiments of the present invention will be described in detail with reference to the drawings. 1237085 (four) Embodiment A double-opening door closer CL according to this embodiment is installed on one side of door D and used as shown in FIG. 1. At this time, the lower part corresponding to the door D is rotatably supported by a door hinge Η on the other body. As shown in Figure 2, the double-opening door closer C L In the shaft 50 of the prior art hinge formed in the door frame side of the door D, The door frame side fixing member 1 is fitted in a non-rotatable manner. Specifically, At the center of the door frame side fixing member 1, The output shaft le is integrally fixed, As shown in FIG. 3, a center of the output shaft le is formed with a bolt slot 1a for inserting the shaft 50, A bolt groove shaft 50a formed on the front end of the shaft 50 of the hinge is fitted in the bolt groove hole 1a, Both of them are combined non-rotatably. As shown in Figure 2, The output shaft 1 e fixed in the door frame-side fixing member 1 is formed with a large-diameter portion 1 A and a small-diameter portion 1 B. The center of the output shaft 1 e is formed with a hole 1 b to be screwed with the speed governing rod 2 to be described later. A freely rotating speed regulating gear 3 a is installed in the hole 1 b. One end is fitted into the center hole of the speed control stick 2 which can not rotate but can move up and down freely. Simultaneously, A hole 1c combined with a speed regulating gear 3b that meshes with the speed regulating gear 3a is formed in the door frame side fixing member 1 so as to intersect the hole 1b perpendicularly. In addition, On the outer circumference of the small-diameter portion 1 B of the output shaft 1 e, Warp bearing 4 4 and the cover member 5 are provided with a cylindrical door-side fixing member 7, Through this structure, The door-side fixing member 7 can be mounted on the door-frame-side fixing member 1 and is formed in a structure capable of rotating with respect to the door-frame-side fixing member 1. In addition, 6 in the figure is a C-shaped stopper wheel that blocks the cover member 5, 8 is a threaded hole combining the door 1237085 and the door-side fixing member 7, The threaded holes 8 are formed in the door-side fixing member 7 in an appropriate number. As shown in Figure 6 (c), In the gap S formed in the cylindrical door-side fixing member 7, A cylindrical outer wheel 9 having a wall portion 9a standing on the upper side is fitted and arranged, And a cylindrical inner wheel 10 with a wall portion 10a standing on the upper side, A shaft portion 10c formed on a lower portion of the inner wheel 10 is also rotatably fitted on an inner circumference of the outer wheel 9 (see FIG. 6 (b)). Respective wall portions 9a, 9a, on the upper side of the outer wheel 9 and the inner wheel 10. 10a, Its outer diameter is formed to have the same diameter and is fitted in the above-mentioned space S, And the wall portions 9a, 9a of the outer wheel 9 and the inner wheel 10 10a is formed with a holding rotating body 1 1 (a steel ball in this example, The rollers with a circular cross section are also possible.) The cutouts 9b and 10b. In addition, As shown in Figure 6 (a), The entire outer diameter of the large-diameter portion 1 A of the output shaft 1 e fixed to the door frame-side fixing member 1, A plurality of concave portions 1 d having a circular arc cross-section in which the above-mentioned rotating body 11 is fitted is formed, And on the inner circumference of the door-side fixing member 7, As shown in the figure, a plurality of recessed portions 7a (two portions in this example) in which the cross-section of the rotary body 11 is fitted is formed in a circular arc shape, By these recesses 1 d, 7a and the rotating body 11 to form the output shaft 1e of the door frame-side fixing member 1, the stopper of the door-side fixing member 7, and the inner wheel 10, And the stopper of the output shaft 1 e of the door frame side fixing member 1 and the door frame side fixing member 7 and the inner wheel 10 (the stop target is switched according to the direction of opening the door). In addition, The output shaft 1 e of the door frame-side fixing member 1 is formed with a protrusion 1 3 that connects the wall portions 10 a and 9 a to prevent the inner wheel 10 and the outer wheel 9 from rotating. In addition, 1237085 is formed on the inner circumference of the door-side fixing member 7 to form a protrusion 14 connecting the wall portions 10 a and 9 a to rotate the inner wheel 10 and the outer wheel 9. such, When the door is closed, As shown in FIG. 6 (a), the protrusions 14 of the door-side fixing member 7 and the protrusions 1 of the output shaft 1 e of the door-frame-side fixing member 1 are held by the potential energy of the coil spring to be described later on the outer wheel 9 and the inner Between the wheels 10, the positions of the two protrusions 13 and 14 are aligned and maintained in a neutral state. As shown in Figure 2, The upper end of the cylinder 15 is fixed to the lower portion 'of the outer wheel 9 by an upper moving pin 16, and is configured to be rotatable integrally with the outer wheel 9. In addition, The upper end of the bumper shaft 17 is non-rotatably mounted below the inner wheel 10, The bumper shaft 17 and the inner wheel 10 are configured to rotate integrally. Also in this example, Since the inner wheel 10 and the bumper shaft 17 are fixed by a zigzag connection, Therefore, the bumper shaft 17 and the inner wheel 10 can be formed as a single body. Between the inner circumference of the cylinder 15 and the outer circumference of the bumper shaft 17, It is equipped with a coil spring 1 8 as an elastic body that can roll back the buffer shaft 17, The upper end of the coil spring 18 is fixed to the side of the above-mentioned cylinder 1 5 with a suitable fixing device. On the other hand, the lower end of the coil spring 18 is fixed to the bumper shaft 17 by a suitable fixing device. Also in this example, The upper end of the coil spring 18 is stopped in the spring seat 19 fitted in the buffer shaft 17, In a state where the spring seat 19 is rotated to store a torsional force in the coil spring 18, The fixing pin 20 from the window 1 5 a of the cylinder 15 of the concave portion 19a formed on the outer circumference of the spring seat 19 is fixed, According to this, the upper end of the coil spring 18 can be fixed on one side of the cylinder 15, At the same time, the lower end of the coil spring 18 is coupled to the cutout portion 17a of the bumper shaft 17, With this configuration, 1237085 can be used when the cylinder 15 and the bumper shaft 17 are relatively rotated. A certain torsional force is accumulated in the coil spring 18. In the lower part of the cylinder 15, Equipped with a cylinder 21, The cylinder 21 and the cylinder bottom cover 22 are integrally formed by welding or the like. In addition, The cylindrical bottom cover 22 is fixed to the lower portion of the cylindrical body 15 by a stopper pin 23 or the like. The cylindrical base 24 is sealed with a seal 2 5 and the like inside the front end of the cylindrical 21, and the buffer shaft 17 is disposed through the cylindrical base 24. A base sleeve 2 4 a and a seal 26 are arranged between the buffer shaft 17 and the cylindrical base 2 4. In this way, the cylinder base 24 is integrally fixed to the cylinder 21 and the upper bumper bearing 34 mounted on the cylinder 21 via the stopper pin 35. Inside the above-mentioned cylinder 21 is formed an oil chamber 27 formed by a cylinder base 24 and a cylinder bottom cover 22, The inside of the oil chamber 27 is filled with oil. Oil chamber 2 7 A piston bolt 30 dividing the oil chamber 27 into an upper chamber 28 and a lower chamber 29 is provided, The piston bolt 30 is formed into a cylindrical shape, The outer circumference of the piston bolt 30 and the inner surface of the cylinder 21 are combined by a spiral, The above-mentioned bumper shaft 17 is non-rotating, And a method of having an oil flow path is coupled to the upper part of the above-mentioned piston bolt 30 through a bolt groove, In addition, A valve seat 30A, This valve seat 30A is provided with a check valve 3 1 that can move oil from the upper chamber 2 8 to the lower chamber 2 9 quickly when the piston bolt 30 moves upward according to the opening operation of the door as shown in the figure. (Ball valve in this example). In addition, Between piston bolt 30 and bumper shaft 17 As shown in Figure 5, A flow path (oil escape groove) 3_2 is formed to communicate the upper chamber 28 and the lower chamber 2 9. The above-mentioned piston bolts 30 and bumper shafts 17 are combined in a serrated manner from 1237085, The piston bolt 30 moves up and down along the teeth. With this composition, E.g, When the buffer shaft 17 is in a non-rotating state, if the cylinder 15 is rotated, The cylinder 21, which is integrated with the cylinder 15, is rotated. Further, the piston bolt 3 helically coupled to the inner surface of the cylinder 2 i is moved upward in a non-rotating state by the rotation of the cylinder 21. In addition, If the cylinder 21 integrated with the cylinder 15 is in a non-rotating state and the bumper shaft 17 is rotated, The piston bolt 30, which is combined with the buffer shaft 17 through the serration, rotates integrally with the buffer shaft 17, thus, The piston bolt 3 screwed in the cylinder 21 moves the bumper shaft 17 which is connected by serrations upward. In addition, A speed governing rod 2 is penetrated through a central portion of the valve seat 30A of the piston bolt 30, The part of the governor rod 2 that penetrates the valve seat 3 0 A of the piston bolt 30 is tapered (in this example, it is formed into a tapered shape in which the diameter is sequentially reduced from the lower side to the upper side). Thereby, the speed regulating gear 3 b provided on one side of the door frame-side fixing member 1 is rotated, And through the speed regulating gear 3 a provided inside the output shaft 1 e, the speed regulating rod 2 is rotated, In this way, the speed regulating rod 2 screwed on the output shaft 1 e of the door frame side fixing member 1 can be moved up and down relative to the piston bolt 30. thus, The clearance between the through hole formed in the piston bolt 30 and the speed control rod 2 can be adjusted by the tapered portion of the speed control rod 2, The flow path area of the gap portion can also be adjusted. In addition, A seal 33 is provided between the speed governor 2 and the buffer shaft 17, It is possible to prevent the oil in the oil chamber 27 from flowing into the hole 1b. In addition, The up and down movement of the speed stick 2 is not limited to the screwing method, Other methods such as manual lifting adjustment can also be used. In addition, 3 6 、 37 is a seal and a protector for sealing the outer circumference of the cylinder 21 and the outer circumference of the piston bolt 30. 3 8 is the shaft stop of the buffer shaft 1 7 1237085 wheel. The operation of the double-opening door closer with the above structure will be described below. When the door is closed ’, the inner wheel 1 0, The outer wheel 9 is located at the 0 o'clock rest position shown in Fig. 7 (b). If door D is opened to the right from this state, The door-side fixing member 7 fixed to the door D is rotated to the right (refer to FIG. 7 (c)). As the door-side fixing member 7 rotates in the right direction, The protrusion 1 4 formed on the door-side fixing member 7 is pressed against the wall portion 10 a of the inner wheel 1 0, While rotating the inner wheel to the right. At this time, ′ is a rotating body 1 1 a held on the cutout portion 1 Ob of the inner wheel 10, and the side is left in the recessed portion 7a formed on the door-side fixing member 7, While moving the outer circumference of the output shaft 1 e on the side of the door frame side fixing member 1, The door frame side fixing member 7 and the inner wheel 10 are integrally moved to the right. on the other hand, On the outer wheel 9 side, The projection 13 of the output shaft 1e of the door frame side fixing member 1 contacts the wall portion 9a of the outer wheel 9 to prevent rotation, At the same time, the rotating body 1 1 b moves to the recessed portion 1 d formed in the large-diameter portion 1 A of the output shaft 1 e of the door frame-side fixing member 1 and fits in, Therefore, the door-side fixing member 7 can be moved in such a manner that its rotation on the rotating body 1 1 b is not prevented. at this time, The bumper shaft 17 fixed to the inner wheel 10 is also opened along the inside of FIG. 8 and is turned to the right as shown in the figure and the coil spring 18 is tightened. At the same time, potential energy is accumulated in the coil spring 18. In addition, So at the same time, By the rotation of the buffer shaft 17 The piston bolt 30 also rotates to the right. Due to the rotation of the piston bolt 30, Thereby, the outer circumference of the piston bolt 30 and the inner surface of the cylinder 21 are spirally combined, Therefore, only the piston bolt 30 is moved upward by the screw action. 1237085 As piston bolt 30 moves up, Check valve 3 1 opens, Move the oil in the upper chamber 2 8 through the check valve 3 1 to the lower chamber 2 9, Therefore, when the door d is opened and operated, the braking effect is not exerted. but, Since the gate D-side stores potential energy in the coil spring 18, One side is opened, Therefore, if released from the open state of door 0, The door d is rotated in the closing direction by the action of the coil spring 18 storing potential energy. at this time, As shown in the opening and closing operation of Fig. 8, The bumper shaft 17 rotates in the opposite direction to the above, The check valve closes while the piston bolt 3 moves downward, As a result, the oil coming out of the lower chamber 29 can only flow through the gap between the governor rod and the through hole of the valve seat 30A of the piston bolt 30. at this time, Since the door-side fixing member 7 is integrated with the inner wheel 10, Therefore, it cannot be separated by the inertia of the door D. therefore, at this time, The resistance to the oil flowing through the gap can exert the braking effect on the door D in the closing direction, Door D can be closed slowly. In addition, This closing speed will adjust the speed control gear of the speed control stick 2a, 3 b for rotation, Adjusting the vertical movement gap, Therefore, the closing speed of the door D can be adjusted. In addition, When door D opens to the left from the closed state, The door D and the door-side fixing member 7 fixed to the door D also rotate to the left (see Fig. 7 (a)). Due to the leftward rotation of the door-side fixing member 7, The protrusion 1 4 formed on the side of the door-side fixing member 7 presses the wall portion 9a of the outer wheel 9 while While rotating the outer wheel 9 to the left. at this time, The rotating body 1 1 b held on the cutout portion 9 b of the outer wheel 9 is retained in the recessed portion 7 a formed on the door-side fixing member 7. At the same time, move the outer circumference of the output shaft 1 e of the door frame side fixing member 1, To this end, the door-side fixing member 7 is formed integrally with the outer wheel 9 and moves leftward. on the other hand, On the inner wheel 1 〇 — side, On the door frame side 1237085, the projection 13 of the output shaft 1e of the fixing member 1 contacts the wall portion 1a of the inner wheel 10, Thereby preventing rotation, At the same time, the rotating body 1 1 a moves to the recess 1 d formed on the large-diameter portion 1 A of the output shaft 1 e of the door frame side fixing member 1 and fits there, Therefore, the rotation of the door-side fixing member 7 in the rotating body 1 1 a cannot be prevented from moving. at this time, The cylinder 15 fixed to the outer wheel 9 is also moved to the left as shown in the opening action in FIG. 9, Thereby, the coil spring 18 is tightened, At the same time, potential energy is stored in the coil spring 18. at the same time, The cylinder 21 integrated with the cylinder 15 is also rotated to the left, Therefore, the piston bolt 30 screwed together on the inner peripheral surface of the cylinder 21 is in a non-rotating state. Therefore, only the piston bolt 30 is moved upward by the screw. As the piston bolt 30 moves upward, Check valve 3 1 opens, The oil in the upper chamber 2 8 moves through the check valve 3 1 to the lower chamber 2 9, Therefore, the braking effect is not exerted when the door D is opened. but, Since the gate D-side stores potential energy in the coil spring 18, Open one side, If released from the open state of door d at this time, Due to the role of the coil spring i 8 that has accumulated potential energy, The door D rotates in the closing direction. at this time, As shown in the opening and closing action in Figure 9, The outer wheel 9 rotates in a direction opposite to the aforementioned direction, The cylinder 15 is also rotated in the opposite direction and the piston bolt 30 is moved downward while the check valve 3 i is closed, Therefore, the oil coming out of the lower chamber 29 can be moved only through the gap between the governor rod 2 and the through hole of the valve seat 3 0 A of the piston bolt 30. at this time, Since the door-side fixing member 7 is integrated with the outer wheel 9, Therefore cannot be separated by the inertia of the door. thereby, At this time, the resistance of the oil flowing through the gap can exert a braking effect on the door D in the closing direction. As a result, door d is slowly closed -20-1237085. In addition, This closing speed is due to the speed adjustment gear 3 a, which can adjust the speed of the speed control rod 2. 3 b rotation, And adjust the vertical motion gap, Therefore, the closing speed of the door d can also be adjusted. As shown above, The above embodiment, Whether it's about one side or the other, When the door is opened ’, potential energy is accumulated in the elastic body, When the door is closed, ’the potential energy of the animal is used to close the door. and, A braking effect is applied to the door by the movement resistance of the oil flowing to the upper and lower chambers, The door can then be closed slowly. In addition, In the embodiment detailed above, A coil spring arranged between the barrel and the buffer shaft, As long as it is an elastomer that can achieve the same function, Can take other different forms. Hereinafter, a double-opening door closer in which the free-stop structure is combined in the double-opening door closer will be described with reference to the drawings. The features of this embodiment are: A free-stop structure is combined in the upper part of the above double-opening door closer. therefore, Since the basic structure of the door closer is the same as the above embodiment, The free stop structure is mainly explained here. In addition, The same symbols are used for the same components as those of the above-mentioned embodiment. Fig. 10 is an upper cross-sectional view of a double-opening door closer combined with the free-stop structure (corresponding to the upper cross-sectional view of Fig. 2 in the above embodiment), Figure 11 shows the components of the free stop structure (output shaft, Swivel part holder (hereinafter referred to as roller holder), Inner wheel, Explanatory illustration of the outer wheel), Figures 12 and 2 are sectional views of the roller cage, Side view, Top and bottom views, Fig. 13 is a cross-sectional view of the door-side fixing member installation on the c-C section in Fig. 11; Fig. 14 is a sectional view of the door-side fixing member installed on the D-D section in Fig. 11. In Figure 10, The center of the door frame-side fixing member 1 is integrally fixed 1237285 with an output shaft 60. A slot hole 60a for inserting the shaft 50 is formed at the center of the output shaft 60. The above-mentioned shaft is fitted into the bolt slot hole 60a Groove shaft 50a on the front end of 50, The two are rotatably combined. In addition, 6 7 in the picture, 6 8 are bushes provided in the rotating part, respectively. They are formed of materials such as resins and sintered oil-containing materials. However, other materials with the same function can be used. The outer peripheral surface _h 'of the lower part of the output shaft 6 fixed to the door frame side fixing member is formed with a roller groove (combination portion) 62 that combines a rotating member (hereinafter referred to as a roller) 61 as shown in FIG. 11. , The roller grooves 62 are formed at two positions separated by 180 degrees (see FIG. 13 to be described later). A roller holder 6 3 rotatably fitted in the output shaft 60 via a bushing 6 7 adopts a large-diameter portion 6 3 a and a small-diameter portion 6 as shown in FIG. 11 and FIG. 2. The section formed by 3b is an inverted hat-shaped structure. · The roller retainer 63 is formed with a through hole 64 having a central portion inserted into the speed governor rod 2, In addition, as shown in Figure 11 and Figure 12, The above-mentioned roller 6 1 is held in the upper half of the large-diameter portion 6 3 a, The U-shaped through groove 6 3 c is formed at two positions 180 degrees apart, In addition, in the lower half of the large-diameter portion 6 3 a, a circular arc-shaped recess 63 d of the rotating body 11 in the cutout portions 10 b and 9 b formed in the inner ring 10 and the outer ring 9 is formed and held. . This concave portion 6 3 d corresponds to the concave portion 1 d formed in the output shaft 1 e of the embodiment described above. On the outer circumference of the output shaft 60 and the roller cage 63, and the inner and outer wheels 10 and 9, As shown in Figure 10, A door-side fixing member 7 is provided. In addition, As shown in Figures 11 and 13 (C-C sectional view in Figure 11) • 22-1237085, The inner circumferential surface of the door-side fixing member 7 is at a rest position with respect to 0, The roller grooves 62 formed on the lower outer circumferential surface of the output shaft are formed at two positions spaced 180 degrees apart. A groove 65 is also formed as a joint portion having a diameter approximately twice that of the roller 6 1. The size of the groove 65 may be approximately the diameter of the roller 61 depending on the opening / closing angle of the door. In addition, The groove 65 does not have to be formed in two places. 61 if one Can also be formed in one place, In addition, the shape of the groove 65 may be a circular arc-shaped recessed portion described in the above-mentioned embodiment in which the roller 61 is fitted. In addition, The roller retainer 63 corresponding to the inner wheel 10 and the outer wheel 9 is formed with an arc-shaped convex portion corresponding to the arc-shaped concave portion 1 d formed on the large-diameter portion 1 A of the output shaft 1 e of the above embodiment. 6 3 d, At the same time, protrusions 6 6 corresponding to the protrusions 13 formed on the output shaft 1 e are also formed. such, Roller cage 6 3, Inner wheel 1 0, Outer wheel 9, And the door-side fixing member 7 has the same combined structure as the above-mentioned embodiment as shown in FIG. 14. In addition, Roller cage 63, Inner wheel 1 0, Outer wheel 9, The operation of the door-side fixing member 7 is also the same as that of the above-mentioned embodiment. A detailed description of them is omitted here. ○ Now, the effect of the above-mentioned free stop structure will be described with reference to FIG. 15. In Figure 15 (b), When the door is closed, Inner wheel 10, Outer wheel 9 The roller holder 63 is located at the 0-point rest position (corresponding to FIG. 7 (b) of the above embodiment), The roller holder 63, the output shaft 60, and the door-side fixing member 7 are also located at the 0-point rest position. From this state, as shown in FIG. 15 (c), When door D opens to the right, The door-side fixing member 7 fixed to the door D rotates to the right, Due to the right-hand rotation of the door side -23-1237085 fixing part 7, As described in the above embodiment, The door D is opened while the potential energy is accumulated in the coil spring 18, So if you release it from the open state, The door D is rotated in the direction of closing the door by the coil spring 18 having stored potential energy. at this time, Due to the braking effect, Door D closes slowly. In addition, In a free-stop agency, First of all, At the 0 o'clock rest position where door D is closed, The roller 61 held on the roller holder 63 is incorporated in a roller groove 62 formed in the output shaft 60. thus, If you open door D by hand, On the free-stop side, The door-side fixing member 7 that rotates integrally with the door D rotates in the same direction. at this time, The roller holder 63 is integrated with the output shaft 60 by a roller 61, Non-rotating. such, An elastic force is accumulated in the coil spring 18 incorporated in the inner wheel 10 or the outer wheel 9 in the same manner as in the above embodiment. If you open the door D on the way, The door D returns to its original position by the elastic force of the coil spring 18. but, If door D is opened 90 degrees (refer to Figure 15 (〇), at this time, The roller 61 held in the roller holder 63 moves from a roller groove 62 formed on the side of the output shaft 60 into a large-sized groove 65 formed on the inner peripheral surface of the door-side fixing member 7, The roller 61 is moved toward the outer peripheral surface of the output shaft 60. 'The coupling between the output shaft 60 and the roller 61 of the roller holder 63 is released.' Then the roller holder 63 and the door-side fixing member 7 pass The roller 61 is integrated. the result, When the elastic force accumulated in the coil spring 18 is maintained, door; 〇 The one side fixing member 7 can rotate freely on the outer circumference of the output shaft 60 in a state where the roller 61 is accommodated in the groove 65, If the rotation of the door-side fixing member 7 is stopped, Door D can remain stopped at this position -24-1237085. So in this example, Even if door D is opened further than 90 degrees, After that, the door d can be stopped at an arbitrary position at a desired position. In addition, When door D is closed, Within 90 degrees, if door D returns, Under the action of the elastic force of the coil spring 18, Door d can close automatically. At this time, 'the braking effect described in the above embodiment works, Thus, the effect of the sudden closing of the door D can be avoided. In addition, When opening the door on the opposite side, If door D opens 90 degrees, As shown in Fig. 15 (a), a free stop state with the same operation as in Fig. 15 (b) can be obtained. in this way, In this embodiment, A groove 65 formed on the inner peripheral surface of the door-side fixing member 7 has a width separated from the left to the right by the same length (approximately the diameter of the roller 61) around the 0 point. Therefore, the door D can be in a free stop state from the point at which the door D is opened at about 90 degrees from the 0-point rest position. But ’in the state of 90 degrees open on one side, To get a free stop state, The groove 71 formed on the inner circumferential surface of the door-side fixing member 7 as shown in FIG. 16 (b) is at a position shifted by α degrees with the center of 0 point, When the roller 6 1 is fitted in the arc-shaped recess, As shown in Figure 16 (0, When door D is opened to the right, From the point when the door D is opened at 90 degrees, the free stop state can be obtained. but, When door D opens on the opposite side, As shown in Figure 16 (a), If not open to (90 + 2 α) degrees, You cannot get a free stop state. such, When the groove 71 formed on the inner peripheral surface of the door-side fixing member 7 is formed at a position shifted by α degrees from the center of 0 point (for example, in the prior art, (Refer to JP-A-1 0-220 1 02) ’The opening degree of the free stop state based on the left and right opening angles is not the same as -25-1237085. It will not be suitable for occasions such as double-opening door closers. however, Even with double-opening door closers, Where the structure of the building and the angle of the double opening are different, A free stop structure as shown in Fig. 16 can also be adopted. With the above-mentioned embodiment shown above, Free stop structure with additional roller holder and roller in double-opening door closer, Because of its simple structure, Therefore, it is suitable for miniaturization. In addition, The above embodiments are merely exemplary, Without departing from the spirit and main features of the present invention, The invention can still be implemented in other different forms, It should not be interpreted restrictively. As detailed above, The present invention has the following excellent effects, Due to the hydraulic brake structure installed in the spring door closer, The device can be miniaturized while simplifying its structure, the result, Can hold double-opening door closer in the door, And make construction easier, It is also unaffected by rain and cleaning agents. Because it can be opened from either side, Thus expanding the scope of use, In addition, Since the present invention is equipped with a free stop structure, Therefore, the door can be opened and stopped continuously from a position of more than 90 degrees left and right. And because the groove width is formed large, Therefore, the free stop function can be performed at a position of 90 degrees in either direction. (V) Brief Description of Drawings Figure 1 shows the double-opening door closer in this embodiment. Front and side views of the state mounted on the door; Figure 2 is a sectional view of the double-opening door closer; Figure 3 is a top view of the double-opening door closer; -26- 1237085 Figure 4 is an a-A sectional view of the double-opening door closer shown in Figure 2; FIG. 5 is a cross-sectional view of b_B of the double-opening door closer shown in FIG. 2; Figure 6 is an assembly diagram of the outer wheel and the inner wheel, Part drawing and section view; Figure 6 (a) is a sectional view of a double-opening door closer; Figure 6 (b) is the left part of the double door closer; Figure 6 (c) is a diagram of the upper part of the double-opening door closer; Figure 6 (d) is the right part of the double-opening door closer; Figure 7 is the φ action diagram of the outer wheel and the inner wheel when the double-opening door closer is opened and closed; Figure 7 (a) is a diagram of a double-opening door closer opening to the left; Figure 7 (b) shows the action of switching the direction of rotation of the double-opening door closer at the 0 o'clock position Figure 7 (c) is a diagram of a double-opening door closer opening to the right; Figure 8 is a sectional view of the hydraulic mechanism in the right-opening direction of the double-opening door closer; FIG. 9 is a sectional view of a hydraulic mechanism in a left-opening direction of the double-opening door closer; Figure 10 is a cross-sectional view of the upper part of a double-opening door closer combined with a free-stop structure; Figure 11 shows the components of the free stop structure (output shaft, Roller cage, Inner wheel, Explanatory illustration of the outer wheel); Figure 12 is a sectional view of the roller cage, Side view, Top view and bottom view; FIG. 13 is a sectional view of the door-side fixing member assembled on the C-C section of FIG. 11; -27- 1237085 Figure 14 is a cross-sectional view of the door-side fixing member assembled on the D-D section in Figure 11 Fig. 15 is an operation explanatory diagram of the free stop structure; Figure 15 (a) is the action diagram of opening to the left; Figure 15 (b) is the action diagram for switching the rotation direction at the 0-point rest position; Figure 15 (c) is the action diagram of opening to the right; FIG. 16 is an operation explanatory diagram of another free stop structure; Figure 16 (a) is the action diagram of turning to the left; Figure 16 (b) is the action diagram for switching the rotation direction at the 0-point stationary position; Figure 16 (c) is the action diagram of opening to the right; Fig. 17 is a sectional view showing the structure of a conventional spring-type door closer. Description of main symbols of the main part 1 Door frame side fixing part 1 A large diameter part 1 B small diameter part la bolt groove Id recess 1 e output shaft 2 speed governor 3 a speed governor 3b speed governor 4 bearing 5 cover member 7 door Side fixing part 7a recess -28-1237085 8 threaded hole 9 outer wheel 9 a wall 9b, 10b Notch 10 Inner wheel 10a Wall 1 1 (1 1 a, lib) Rotating body 13 Projection 14 Projection 15 Cylinder body 16 Stopper pin 17 Bumper shaft 17a Notch 18 Coil spring 19 Spring seat 20 Fixing pin 2 1 Cylinder 22 Cylinder bottom cover 23 Stopper pin 24 Cylinder base 25 Seal 26 Seal 27 Oil chamber 28 Upper chamber 29 Lower chamber
-29- 1237085 3 0 活塞螺栓 3 0 A 閥座 3 1 止回閥 3 2 流路 34 緩衝器軸承 50 軸 50a 栓槽軸 60 輸出軸 6 1 滾柱（旋轉部件） 62 滾柱溝結合部）（ 63 滾柱保持部（旋轉部件保持器） 63a 大直徑部 63b 小直徑部 63c 貫通溝 63d 凹部 64 貫通溝 65 溝（結合部） 66 突起 67, 68 襯套 7 1 溝 CL 關門器 D 門 H 鉸鏈 S 空隙-29- 1237085 3 0 piston bolt 3 0 A valve seat 3 1 check valve 3 2 flow path 34 bumper bearing 50 shaft 50a bolt groove shaft 60 output shaft 6 1 roller (rotating part) 62 roller groove joint) (63 Roller holding part (rotary part holder) 63a Large diameter part 63b Small diameter part 63c Through groove 63d Concave part 64 Through groove 65 groove (joint) 66 Protrusion 67, 68 Bushing 7 1 groove CL Door closer D Door H Hinge S Clearance
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